阅读说明：本技术 一种热作模具钢的热处理加工装置 (Heat treatment processing device for hot work die steel ) 是由 李雪云 于 2021-09-14 设计创作，主要内容包括：本发明公开了一种热作模具钢的热处理加工装置,包括：热处理加工装置包括：壳体、封隔门、转动平台、平台转动驱动部、至少一个固定组件、翻转组件和夹持转动组件；壳体内形成有空腔,转动平台设置于空腔内,封隔门位于转动平台的上方；封隔门的一部分设置于空腔内,剩余部分延伸至壳体的外部,封隔门能够将空腔分隔为热处理腔和冷却腔并且封隔门能够于空腔内往复运动；平台转动驱动部通过转动连接件与转动平台相连接,以能够驱动转动平台转动；固定组件设置于转动平台上,以能够安装热作模具钢；翻转组件设置于封隔门上且延伸至冷却腔内,夹持转动组件设置于壳体上,该装置解决了现有技术中热处理加工装置处理后模具钢开裂问题。(The invention discloses a heat treatment processing device of hot work die steel, which comprises: the heat treatment processing device comprises: the device comprises a shell, a sealing door, a rotating platform, a platform rotating driving part, at least one fixing component, a turnover component and a clamping rotating component; a cavity is formed in the shell, the rotating platform is arranged in the cavity, and the packing door is positioned above the rotating platform; one part of the sealing door is arranged in the cavity, the other part of the sealing door extends to the outside of the shell, the sealing door can divide the cavity into a heat treatment cavity and a cooling cavity, and the sealing door can reciprocate in the cavity; the platform rotation driving part is connected with the rotation platform through a rotation connecting piece so as to drive the rotation platform to rotate; the fixed assembly is arranged on the rotating platform so as to be capable of mounting hot-work die steel; the turnover assembly is arranged on the sealing door and extends into the cooling cavity, the clamping rotating assembly is arranged on the shell, and the device solves the problem that the die steel cracks after being processed by the heat treatment processing device in the prior art.)

1. The utility model provides a hot work die steel's heat treatment processingequipment which characterized in that: the method comprises the following steps: the heat treatment processing device includes: the device comprises a shell (1), a sealing door (9), a rotating platform (5), a platform rotating driving part (6), at least one fixing component (7), a turning component (12) and a clamping rotating component (16); a cavity is formed in the shell (1), the rotating platform (5) is arranged in the cavity, and the sealing door (9) is positioned above the rotating platform (5); a part of the sealing door (9) is arranged in the cavity, the rest part of the sealing door extends to the outside of the shell (1), the sealing door (9) can divide the cavity into a heat treatment cavity (2) and a cooling cavity (3), and the sealing door (9) can reciprocate in the cavity; the platform rotation driving part (6) is connected with the rotation platform (5) through a rotation connecting piece (4) so as to drive the rotation platform (5) to rotate; the fixing assembly (7) is arranged on the rotating platform (5) so as to be capable of installing hot-work die steel; the overturning assembly (12) is arranged on the sealing door (9) and extends into the cooling cavity (3), and the clamping rotating assembly (16) is arranged on the shell (1);

in the case of the enclosure door (9) being remote from the rotary platform (5), the rotary platform (5) can rotate to switch the fixed assembly (7) between the thermal treatment chamber (2), cooling chamber (3); when the rotating platform (5) is positioned in the cooling cavity (3), the overturning assembly (12) can drive the hot-work die steel to overturn, and the clamping rotating assembly (16) can drive a clamping piece on the fixing assembly (7) and the hot-work die steel to generate displacement.

2. The heat treatment processing apparatus of hot work die steel according to claim 1, characterized in that: the fixing component (7) comprises a pair of supporting seats (23), a pair of fixing plates (26) and a pair of lifting plates (30); the pair of fixing plates (26) are positioned between the pair of supporting seats (23), and the fixing plates (26) are arranged on the supporting seats (23) through fixing plate rotating shafts (25); the fixed plate rotating shaft (25) can extend to the outside of the supporting seat (23) and is connected with the overturning assembly (12), a guide groove (27) is formed in the fixed plate (26), two ends of the lifting plate (30) are clamped in the guide groove (27) and can reciprocate along the guide groove (27), and the lifting plate (30) can be fixed on the fixed plate (26) through a positioning assembly so that the hot-work die steel is fixed between the two lifting plates (30); a rotary connecting seat (31) is arranged on the outer side of the lifting plate (30);

wherein the overturning assembly (12) can be connected with the fixed plate rotating shaft (25) so as to drive the fixed plate (26) to rotate; the clamping rotating assembly (16) can be matched with the rotating connecting seat (31) so as to drive the lifting plate (30) to rotate.

3. The heat treatment processing apparatus for hot work die steel according to claim 2, characterized in that: the overturning assembly (12) comprises an overturning rotating unit (36), an overturning rotating shaft (37), an overturning telescopic unit (38) and an overturning telescopic shaft (39) which are connected in sequence; the overturning rotating unit (36) is arranged in the sealing door (9), and the overturning rotating unit (36) can drive the overturning rotating shaft (37) to rotate; the overturning telescopic unit (38) can drive the overturning telescopic shaft (39) to be telescopic back and forth so as to be far away from or connected with the fixed plate rotating shaft (25).

4. The heat treatment processing apparatus of hot work die steel according to claim 3, characterized in that: the outer edge of the supporting seat (23) is provided with a shaft connecting seat (24), and a bearing is arranged in the shaft connecting seat (24) to connect the fixing plate rotating shaft (25) and the overturning telescopic shaft (39).

5. The heat treatment processing apparatus for hot work die steel according to claim 3 or 4, characterized in that: the clamping rotating assembly (16) comprises a clamping rotating unit (17), a clamping rotating shaft (18), a clamping telescopic unit (19) and a clamping telescopic shaft (20), wherein the clamping rotating unit (17), the clamping rotating shaft (18), the clamping telescopic unit (19) and the clamping telescopic shaft (20) are at least sequentially connected from top to bottom, the clamping rotating unit (17) is arranged at the top of the shell (1), the clamping rotating unit (17) can drive the clamping rotating shaft (18) to rotate, and the clamping telescopic unit (19) can drive the clamping telescopic shaft (20) to vertically extend and retract; when the lifting plate (30) is positioned below the clamping telescopic shaft (20), the clamping telescopic shaft (20) can extend into the rotating connecting seat (31).

6. The heat treatment processing apparatus for hot work die steel according to any one of claim 5, characterized in that: the clamping rotating unit (17) and the overturning rotating unit (36) are motors, and the clamping telescopic unit (19) and the overturning telescopic unit (38) are respectively and independently selected from air cylinders or hydraulic cylinders.

7. The heat treatment processing apparatus for hot work die steel according to any one of claims 2 to 4, characterized in that: the positioning assembly comprises an inner positioning block (29) and an outer positioning block (28), the inner positioning block (29) and the outer positioning block (28) can be positioned in the guide groove (27) to slide, and the inner positioning block (29) and the outer positioning block (28) can be fixed on the guide groove (27) through positioning pieces (33); the end of the lifting plate is positioned between the inner positioning block (29) and the outer positioning block (28).

8. The heat treatment processing apparatus for hot work die steel according to any one of claims 2 to 4, characterized in that: the lifting plate (30) comprises a circular frame (33), a plurality of parallel warp ribs (34), a plurality of parallel weft ribs (35) and a plurality of ejector pin assemblies, wherein the warp ribs (34) and the weft ribs (35) are mutually crossed to form cross joints; the ejector pin assembly is arranged on the inner edge of the cross connection part, so that the ejector pin assembly can abut against the hot work die steel; the rotary connecting seat (31) is arranged on the outer edge of the cross connection position.

9. The heat treatment processing apparatus of hot work die steel according to claim 8, characterized in that: the ejector pin assembly comprises a plurality of ejector pin groups, and each ejector pin group comprises a plurality of ejector pins (32); the lengths of the thimbles (32) in each thimble group are the same, the lengths of the thimbles (32) in two adjacent thimble groups are different, and the thimble groups are arranged in a crossed manner.

10. The heat treatment processing apparatus for hot work die steel according to any one of claims 2 to 4, characterized in that: the heat treatment processing device further comprises an air cooling unit (13), an air outlet (22) is formed in the outer wall of the cooling cavity (3), the air cooling unit (13) and the air outlet (22) are respectively located at two ends of one diagonal of the cooling cavity (3), the air cooling unit (13) is located above the air outlet (22), and the fixing component (7) is located between the air cooling unit (13) and the air outlet (22);

preferably, two ends of the other diagonal of the cooling cavity (3) are respectively provided with an air guide mechanism (21), the air guide mechanism (21) comprises a fixed rod (42) and an inwards concave curved plate (41) which are sequentially connected, the fixed rod (42) is fixed on the inner wall of the cooling cavity (3), and the curved plate (41) faces the fixed component (7);

preferably, the air cooling unit (13) is connected with a cold air providing unit through an air inlet pipe (15), and a plurality of blowing pipes (14) are arranged on the side edge of the air cooling unit (13) facing the fixing component (7);

preferably, the heat treatment processing device further comprises a preheating chamber (40), wherein the preheating chamber (40) is connected with the air outlet (22);

preferably, a preheating unit (8) is arranged in the heat treatment cavity (2);

preferably, racks (11) are respectively arranged on two side walls of an inner cavity of the sealing door (9), and a door driving unit (10) is arranged in the sealing door (9); the driving wheel of the door driving unit (10) is meshed with the rack (11) so as to drive the sealing door (9) to reciprocate up and down.

Technical Field

The invention relates to post-treatment of hot die steel, in particular to a heat treatment processing device of hot die steel.

Background

The main characteristic of the working condition of the hot working die is the contact with hot metal, which is the main difference from the working condition of the cold working die. The hot working die comprises a hammer forging die, a hot extrusion die and a die-casting die. The hot work die steel is a raw material for manufacturing the hot work die, and has proper requirements on hardness, and focuses on red hardness, thermal conductivity and wear resistance.

In order to improve mechanical properties such as hardness and toughness of hot-work die steel, it is necessary to heat-treat the hot-work die steel. The heat treatment process of the hot die steel plays a decisive role in the structure and the performance, and the heat treatment aims to change the structure of the steel by heating and cooling methods so as to improve the mechanical properties such as hardness, toughness and the like.

The heat treatment system adopted by the steel at present is a quenching and spheroidizing annealing process method, the quenching system mainly comprises heating to a temperature of 30-50 ℃ above Ac3, oil cooling or water cooling, taking out and immediately tempering when the temperature is cooled to 150-200 ℃, the spheroidizing annealing system comprises heating to a temperature of 20-30 ℃ above Ac1, rapidly cooling to Ar 1-20-30 ℃, isothermally taking out and air cooling.

Most of the existing die steel heat treatment forging furnaces have the problem of complex cold-hot alternate treatment, the die steel is taken out by the mechanical arm after the die is heated and treated, the die steel is placed in the water cooling chamber, after the water cooling, the die steel is clamped in the heating chamber by the mechanical arm, the operation is complex, sparks are easy to splash in the mechanical arm transportation process, and certain danger exists.

In order to solve the above problems, patent document No. CN210314378U discloses "a multi-stage forging furnace for heat treatment of die steel, which includes a treatment furnace, a preheating chamber, a first motor, a heating device and a second motor, wherein a water cooling chamber is provided on the right side of the treatment furnace, a water pipe is provided on the upper surface of the water cooling chamber, a water outlet hole is provided on the surface of the water pipe, an air outlet is provided on the upper surface of the water cooling chamber, an air duct is fixed on the upper surface of the water cooling chamber, the preheating chamber is fixed on the right surface of the water cooling chamber, the first motor is fixed on the lower surface of the treatment furnace, a turntable is fixed on the output end of the first motor, and a sliding groove is provided on the upper surface of the turntable. This multistage hot work die steel heat treatment forging furnace is provided with carousel and dog, has simplified the step of die steel when carrying out cold and hot processing, has also prevented that die steel can meet unexpected risk in the external transportation, when having protected staff's life safety, has also improved the thermal treatment efficiency "of die steel.

Although the die steel heat treatment forging furnace solves the problem of complex cold and hot alternate treatment, the inventor finds that the hot die steel cracks in cooling in the using process, thereby causing waste of raw materials and aggravation of production cost.

Disclosure of Invention

The invention aims to provide a heat treatment processing device for hot work die steel, which aims to solve the problem of cracking of the hot work die steel after being processed by the heat treatment processing device in the prior art.

In order to solve the technical problems, the invention specifically provides the following technical scheme:

the invention provides a heat treatment processing device of hot work die steel, comprising: the heat treatment processing device includes: the device comprises a shell, a sealing door, a rotating platform, a platform rotating driving part, at least one fixing component, a turnover component and a clamping rotating component; a cavity is formed in the shell, the rotating platform is arranged in the cavity, and the sealing door is positioned above the rotating platform; a part of the sealing door is arranged in the cavity, and the rest part of the sealing door extends to the outside of the shell, the sealing door can divide the cavity into a heat treatment cavity and a cooling cavity, and the sealing door can reciprocate in the cavity; the platform rotation driving part is connected with the rotation platform through a rotation connecting piece so as to drive the rotation platform to rotate; the fixed assembly is arranged on the rotating platform so as to be capable of mounting hot-work die steel; the overturning assembly is arranged on the sealing door and extends into the cooling cavity, and the clamping rotating assembly is arranged on the shell;

the rotary platform can rotate to enable the fixing assembly to be switched between the heat treatment chamber and the cooling chamber under the condition that the isolation door is far away from the rotary platform; when the rotating platform is positioned in the cooling cavity, the overturning assembly can drive the hot die steel to overturn, and the clamping rotating assembly can drive the clamping piece on the fixing assembly to displace with the hot die steel.

As a preferred embodiment of the present invention, the fixing assembly includes a pair of supporting seats, a pair of fixing plates, and a pair of lifting plates; the pair of fixing plates are positioned between the pair of supporting seats, and the fixing plates are arranged on the supporting seats through fixing plate rotating shafts; the rotating shaft of the fixed plate can extend to the outside of the supporting seat to be connected with the overturning assembly, a guide groove is formed in the fixed plate, two ends of the lifting plate are clamped in the guide groove and can reciprocate along the guide groove, and the lifting plate can be fixed on the fixed plate through a positioning assembly so that the hot work die steel is fixed between the two lifting plates; a rotary connecting seat is arranged on the outer side of the lifting plate;

the overturning assembly can be connected with the fixed plate rotating shaft so as to drive the fixed plate to rotate; the clamping rotating assembly can be matched with the rotating connecting seat to drive the lifting plate to rotate.

As a preferred embodiment of the present invention, the turnover assembly includes a turnover rotation unit, a turnover rotation shaft, a turnover telescopic unit, and a turnover telescopic shaft, which are connected in sequence; the overturning rotating unit is arranged in the packer door and can drive the overturning rotating shaft to rotate; the turnover telescopic unit can drive the turnover telescopic shaft to stretch back and forth so as to be far away from or connected with the fixed plate rotating shaft.

As a preferred embodiment of the present invention, a shaft connecting seat is disposed at an outer edge of the supporting seat, and a bearing is disposed in the shaft connecting seat to connect the fixed plate rotating shaft and the turnover telescopic shaft.

As a preferred embodiment of the present invention, the clamping rotating assembly includes a clamping rotating unit, a clamping rotating shaft, a clamping telescopic unit and a clamping telescopic shaft, which are at least sequentially connected from top to bottom, the clamping rotating unit is disposed at the top of the housing, the clamping rotating unit can drive the clamping rotating shaft to rotate, and the clamping telescopic unit can drive the clamping telescopic shaft to extend and retract up and down; when the lifting plate is located below the clamping telescopic shaft, the clamping telescopic shaft can extend into the rotating connecting seat.

As a preferred embodiment of the present invention, the clamping rotation unit and the overturning rotation unit are motors, and the clamping telescoping unit and the overturning telescoping unit are each independently selected from a cylinder or a hydraulic cylinder.

As a preferred embodiment of the present invention, the positioning assembly includes an inner positioning block and an outer positioning block, the inner positioning block and the outer positioning block can be located in the guide slot to slide, and both the inner positioning block and the outer positioning block can be fixed on the guide slot by a positioning element; the end part of the lifting plate is positioned between the inner positioning block and the outer positioning block.

As a preferred embodiment of the invention, the lifting plate comprises a circular frame, a plurality of parallel warp ribs, a plurality of parallel weft ribs and a plurality of ejector pin assemblies, wherein the warp ribs and the weft ribs are mutually crossed to form cross joints; the ejector pin assembly is arranged on the inner edge of the cross connection part, so that the ejector pin assembly can abut against the hot work die steel; the rotary connecting seat is arranged on the outer edge of the cross connection position.

As a preferred embodiment of the present invention, the thimble assembly comprises a plurality of thimble groups, each of the thimble groups comprises a plurality of thimbles; the length of the thimble in each thimble group is the same, the length of the thimble in two adjacent thimble groups is different, and each thimble group is arranged in a crossing way.

As a preferred embodiment of the present invention, the heat treatment processing apparatus further includes an air cooling unit, an air outlet is disposed on an outer wall of the cooling chamber, the air cooling unit and the air outlet are respectively located at two opposite ends of one of opposite corners of the cooling chamber, wherein the air cooling unit is located above the air outlet, and the fixing component is located between the air cooling unit and the air outlet.

As a preferred embodiment of the present invention, two ends of the other diagonal of the cooling cavity are respectively provided with an air guiding mechanism, the air guiding mechanism includes a fixed rod and an inwardly concave curved plate which are sequentially connected, the fixed rod is fixed on the inner wall of the cooling cavity, and the curved plate faces the fixed component.

As a preferred embodiment of the present invention, the air cooling unit is connected to the cold air providing unit through an air inlet pipe, and a plurality of blowing pipes are disposed on a side of the air cooling unit facing the fixing assembly.

As a preferred embodiment of the present invention, the heat treatment processing apparatus further includes a preheating chamber, and the preheating chamber is connected to the air outlet.

As a preferred embodiment of the present invention, a preheating unit is disposed in the heat treatment chamber.

As a preferred embodiment of the present invention, two side walls of an inner cavity of the enclosure door are respectively provided with a rack, and a door driving unit is arranged in the enclosure door; and the driving wheel of the door driving unit is meshed with the rack so as to drive the sealing door to reciprocate up and down.

In the above technical solution, the specific operation process of the present invention is as follows: firstly, opening a furnace door of a heat treatment processing device (the furnace door is not marked in the figure, and two sides of a heat treatment cavity and a cooling cavity are respectively provided with the furnace door), fixing hot working die steel on the fixed component, then driving the isolation door to move so as to enable an enough space gap to be formed between the isolation door and the rotating platform, then driving the rotating platform to rotate through the platform rotating driving part so as to enable the fixed component to be positioned in the heat treatment cavity, and then continuously starting the isolation door so as to enable the isolation door to be tightly combined with the rotating platform, thereby dividing a cavity in the shell into the heat treatment cavity and the cooling cavity; once the hot work die steel is heated in the heat treatment cavity, the separating door is opened again, and the platform rotation driving part is started, so that the fixed assembly is transferred into the cooling cavity, namely the hot work die steel is transferred into the cooling cavity; in the cooling process, the hot die steel is overturned through the overturning assembly, and meanwhile, the clamping piece in the fixing assembly and the hot die steel are displaced through the clamping rotating assembly.

Compared with the prior art, the invention has the following beneficial effects:

1. in the prior art, no matter water cooling, oil cooling or air cooling, the cooling direction is fixed relative to hot work die steel, so that the cooling speed of each surface of the hot work die steel is inconsistent, for example, one side close to a cooling source is cooled quickly, and the other side far away from the cooling source is cooled slowly, the inventor finds through research that the cooling speed of each part on the same hot work die steel is inconsistent, so that the hot work die steel is easy to crack; aiming at the phenomenon, the cooling speed of each part on the same hot work die steel is basically consistent through the matching of the overturning assembly and the fixing assembly, so that the cracking phenomenon is avoided.

2. The inventor also found that since the hot-work die steel needs to use a fixed tool, such as the "support bar" in the patent document of publication No. CN210314378U, during the cooling process, the fixed tool and the hot-work die steel have a fixed contact area, and the cooling rate of the contact portion is affected by the contact of the fixed tool and is also slowed down, so that the cooling rates of the same hot-work die steel are not the same, and the cracking of the hot-work die steel is further accelerated. Aiming at the situation, the clamping piece and the hot work die steel are displaced through the matching of the clamping rotating assembly and the fixing assembly, so that the change of the contact position between the clamping piece and the hot work die steel is further ensured, the consistency of the cooling speed of all parts on the same hot work die steel is ensured as much as possible, and the cracking of the hot work die steel is effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic structural view of a preferred embodiment of a heat treatment apparatus for hot work die steel according to the present invention;

FIG. 2 is a schematic structural view of a preferred embodiment of the fixing assembly of FIG. 1;

FIG. 3 is a top view of FIG. 2 (omitting the supporting base, the shaft connecting base and the rotating shaft of the fixing plate);

FIG. 4 is a schematic structural view of a preferred embodiment of the enclosure door and roll-over assembly of FIG. 1;

fig. 5 is a schematic structural view of a preferred embodiment of the air guide mechanism in fig. 1.

The reference numerals in the figures have the following meanings:

1. housing 2, thermal treatment chamber

3. Cooling chamber 4, rotating connection piece

5. Rotating platform 6 and platform rotation driving part

7. Fixing assembly 8 and preheating unit

9. Sealing door 10 and door driving unit

11. Rack 12 and overturning assembly

13. Air cooling unit 14 and blowing pipe

15. Air inlet pipe 16 and clamping rotating assembly

17. Clamping rotation unit 18 and clamping rotation shaft

19. Clamping telescopic shaft 21 and air guide mechanism

22. Air outlet 23, supporting seat

24. Axle connecting seat 25, fixed plate rotation axis

26. Fixing plate 27 and guide groove

28. Outer positioning block 29 and inner positioning block

30. Lifting plate 31, rotating connecting seat

32. Thimble 33, circular frame

34. Warp-wise rib 35, weft-wise rib

36. Overturning rotating unit 37 and overturning rotating shaft

38. Overturning telescopic unit 39 and overturning telescopic shaft

40. Preheating chamber 41, bent plate

42. And (5) fixing the rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention provides a heat treatment processing apparatus for hot work die steel, as shown in fig. 1 to 5, comprising: the heat treatment processing device includes: the device comprises a shell 1, a sealing door 9, a rotating platform 5, a platform rotating driving part 6 (such as a motor), at least one fixing component 7, a turnover component 12 and a clamping rotating component 16; a cavity is formed in the shell 1, the rotating platform 5 is arranged in the cavity, and the sealing door 9 is positioned above the rotating platform 5; a part of the sealing door 9 is arranged in the cavity, the rest part of the sealing door extends to the outside of the shell 1, the sealing door 9 can divide the cavity into a heat treatment cavity 2 and a cooling cavity 3, and the sealing door 9 can reciprocate in the cavity; the platform rotation driving part 6 is connected with the rotation platform 5 through a rotation connecting piece 4 so as to drive the rotation platform 5 to rotate; the fixed assembly 7 is arranged on the rotating platform 5 so as to be capable of installing hot-work die steel; the overturning assembly 12 is arranged on the sealing door 9 and extends into the cooling cavity 3, and the clamping rotating assembly 16 is arranged on the shell 1; the overturning assembly 12 is arranged on the isolation door 9 and can move along with the motion of the isolation door 9, so that the influence on the rotation of the rotating platform 5 is avoided;

with the containment door 9 remote from the rotary platform 5, the rotary platform 5 can rotate to switch the fixed assembly 7 between the thermal treatment chamber 2 and the cooling chamber 3; when the rotating platform 5 is positioned in the cooling cavity 3, the overturning assembly 12 can drive the hot-work die steel to overturn, and the clamping rotating assembly 16 can drive a clamping piece on the fixing assembly 7 to displace with the hot-work die steel.

In the present invention, the structure of the fixing assembly 7 is not particularly limited, but in order to further improve the matching ability of the fixing assembly 7 with the turnover assembly 12 and the clamping rotating assembly 16, respectively, preferably, as shown in fig. 2 to 3, the fixing assembly 7 includes a pair of supporting seats 23, a pair of fixing plates 26 and a pair of lifting plates 30; the pair of fixing plates 26 are located between the pair of supporting seats 23, and the fixing plates 26 are arranged on the supporting seats 23 through fixing plate rotating shafts 25; the fixed plate rotating shaft 25 can extend to the outside of the supporting seat 23 to be connected with the turnover assembly 12, a guide groove 27 is formed in the fixed plate 26, two ends of the lifting plate 30 are clamped in the guide groove 27 and can reciprocate along the guide groove 27, and the lifting plate 30 can be fixed on the fixed plate 26 through a positioning assembly so that the hot die steel is fixed between the two lifting plates 30; a rotary connecting seat 31 is arranged on the outer side of the lifting plate 30; wherein, the turnover assembly 12 can be connected with the fixed plate rotating shaft 25 so as to drive the fixed plate 26 to rotate; the clamping rotating assembly 16 can be matched with the rotating connecting seat 31 so as to drive the lifting plate 30 to rotate.

In the above embodiment, on the one hand, the distance between the two lifting plates 30 can be adjusted by the guide groove 27, so that the two lifting plates 30 can fix hot work die steel of different sizes; on the other hand, when the hot-work die steel is fixed, the hot-work die steel needs to be installed between the two fixing plates 26 and cannot be attached to the fixing plates 26, thereby avoiding the influence of the fixing plates 26 on the cooling effect of the hot-work die steel.

In case two the lifter plate 30 is fixed hot work die steel, alright start cooperation between upset subassembly 12, the fixed plate axis of rotation 25 to drive through drive fixed plate axis of rotation 25 the lifter plate 30 upset, and then drive hot work die steel and realized the upset, realized from this that there is the change between cooling direction and the hot work die steel, and then guaranteed the refrigerated homogeneity of hot work die steel. Wherein, the single turnover period of the hot-work die steel can be adjusted according to the cooling speed and the specification of the hot-work die steel, such as turnover once within 5-10 min.

When the lifting plate 30 is fixed at a certain position, the clamping rotating assembly 16 can be started to be matched with the rotating connecting seat 31, the clamping rotating assembly 16 drives the lifting plate 30 to rotate (the rotating angle can be adjusted according to actual conditions, generally, the rotation of a small angle can be realized, for example, 3-5 degrees/time, clearance fit is preferably adopted between the lifting plate 30 and the hot work die steel, the clearance fit can facilitate the rotation of the lifting plate 30, the resistance in the rotating process is small), so that the contact positions of the lifting plate 30 and the hot work die steel are changed, the adverse effect of the lifting plate 30 on the cooling of the hot work die steel is avoided, the cooling speed of each part of the hot work die steel is basically kept consistent, and the cracking phenomenon is avoided.

Besides, in addition to the above-mentioned way that the lifting plate 30 changes the contact position of the lifting plate 30 and the hot-work die steel by rotating, other ways, such as translation, vibration, etc., can be adopted.

In the above embodiment, the specific structure of the turnover assembly 12 can be selected in a wide range, but in order to further enhance the turnover effect of the turnover assembly 12, preferably, as shown in fig. 4, the turnover assembly 12 includes a turnover rotating unit 36, a turnover rotating shaft 37, a turnover telescopic unit 38 and a turnover telescopic shaft 39 which are connected in sequence; the overturning rotating unit 36 is arranged in the sealing door 9, and the overturning rotating unit 36 can drive the overturning rotating shaft 37 to rotate; the roll-over expansion unit 38 can drive the roll-over expansion shaft 39 to expand and contract back and forth so as to be away from or connected to the fixed plate rotation shaft 25.

The cooperation between the turning telescopic unit 38 and the turning telescopic shaft 39 can avoid the obstruction of the turning assembly 12 to the rotation of the rotating platform 5; the cooperation of the turning rotary unit 36 and the turning rotary shaft 37 can provide power for the rotation of the fixing plate 26, thereby realizing the turning of the hot-work die steel.

In the above embodiment, the turnover telescopic shaft 39 and the shaft connecting seat 24 may be directly connected, and if the heads of the turnover telescopic shaft 39 and the shaft connecting seat are respectively provided with a groove and an insertion block which are matched with each other, the connection may also be performed by a connecting member, in order to improve the stability of the connection, preferably, the outer edge of the supporting seat 23 is provided with the shaft connecting seat 24, and the shaft connecting seat 24 is provided with a bearing to connect the fixed plate rotating shaft 25 and the turnover telescopic shaft 39. Therefore, the stability of the fixed plate rotating shaft 25 and the overturning telescopic shaft 39 in the connection process is ensured through the clamping of the shaft connecting seat 24, and the overturning stability of the hot-work die steel is further ensured.

In the present invention, the specific structure of the clamping rotating assembly 16 may be in various forms, but in order to further improve that the clamping rotating assembly 16 is convenient to control the lifting plate 30 to move, preferably, the clamping rotating assembly 16 comprises a clamping rotating unit 17, a clamping rotating shaft 18, a clamping telescopic unit 19 and a clamping telescopic shaft 20, which are connected at least in sequence from top to bottom, the clamping rotating unit 17 is arranged at the top of the housing 1, the clamping rotating unit 17 can drive the clamping rotating shaft 18 to rotate, and the clamping telescopic unit 19 can drive the clamping telescopic shaft 20 to extend and retract up and down; when the lifting plate 30 is located below the clamping telescopic shaft 20, the clamping telescopic shaft 20 can extend into the rotating connecting seat 31.

Similar to the turning assembly 12, the clamping telescopic unit 19 and the clamping telescopic shaft 20 can be matched to avoid blocking the rotation of the fixing assembly 7, and the clamping rotary unit 17 and the clamping rotary shaft 18 can be matched to provide power for the movement of the lifting plate 30. In this embodiment, the clamping rotation unit 17 is disposed on the top of the housing 1, and of course, the clamping rotation unit 17 may be disposed on the top of the housing 1, or may be disposed on other positions of the housing 1, only on the top, so as to ensure that the connection between the clamping telescopic shaft 20 and the rotation connection seat 31 is more secure.

In the above embodiments, the specific kinds of the grip rotating unit 17, the reverse rotating unit 36, the grip retracting unit 19, and the reverse retracting unit 38 are not particularly limited, but from the viewpoint of convenience of operation, it is preferable that the grip rotating unit 17 and the reverse rotating unit 36 are motors, and the grip retracting unit 19 and the reverse retracting unit 38 are each independently selected from a cylinder or a hydraulic cylinder.

In addition, in the present invention, the structure of the positioning assembly may be varied as long as the positioning assembly can be engaged with the guide groove 27 to fix the lifting plate 30, but in order to facilitate the lifting of the lifting plate 30, preferably, the positioning assembly includes an inner positioning block 29 and an outer positioning block 28, the inner positioning block 29 and the outer positioning block 28 can be slidably located in the guide groove 27, and both the inner positioning block 29 and the outer positioning block 28 can be fixed to the guide groove 27 by a positioning member 33; the end of the lifter plate is located between the inner locating block 29 and the outer locating block 28. Thus, the inner positioning block 29 and the outer positioning block 28 facilitate, on the one hand, the adjustment of the position in the guide groove 27 and thus the adjustment of the position of the lifting plate 30; on the other hand, the clamping of both the inner 29 and outer 28 positioning blocks thus ensures the stability of the lifter plate 30.

In the above embodiment, the structure of the lifting plate 30 is not particularly required, but in order to further avoid the influence of the lifting plate 30 on the cooling effect of the hot-work die steel, preferably, the lifting plate 30 includes a circular frame 33, a plurality of parallel warp ribs 34, a plurality of parallel latitudinal ribs 35 and a plurality of ejector pin assemblies, and the warp ribs 34 and the latitudinal ribs 35 are intersected with each other to form intersecting joints; the ejector pin assembly is arranged on the inner edge of the cross connection part, so that the ejector pin assembly can abut against the hot work die steel; the rotary connecting holder 31 is disposed on the outer edge of the cross-connecting portion.

Here, the warp ribs 34 and the weft ribs 35 form more cavities, so that the contact between a cooling source and hot work die steel is facilitated, and the cooling effect is improved; on the other hand, the existence of the ejector pin assembly further reduces the contact area between the lifting plate 30 and the hot die steel.

On the basis of the above embodiment, preferably, the thimble assembly includes a plurality of thimble groups, and each thimble group includes a plurality of thimbles 32; the lengths of the thimbles 32 in each thimble group are the same, the lengths of the thimbles 32 in two adjacent thimble groups are different, and the thimble groups are arranged in a crossed manner. Therefore, the thimble groups are composed of thimbles 32 with different lengths and are distributed in a cross manner, so that the thimbles 32 in the thimble groups can stably fix the hot-work die steel no matter the hot-work die steel is flat or the hot-work die steel with an irregular surface.

In the above embodiment, the heat treatment device may have a plurality of cooling manners, and may be any one of air cooling, water cooling and oil cooling, and from the environmental protection perspective and avoiding pollution to the hot die steel, preferably, the heat treatment device further includes an air cooling unit 13, an air outlet 22 is provided on the outer wall of the cooling cavity 3, the air cooling unit 13 and the air outlet 22 are respectively located at two ends of one diagonal of the cooling cavity 3, wherein the air cooling unit 13 is located above the air outlet 22, and the fixing component 7 is located between the air cooling unit 13 and the air outlet 22. The air cooling unit 13 and the air outlet 22 are located at two opposite ends of one of the opposite corners of the cooling cavity 3, so that the cooling source fills the cooling cavity 3 as much as possible, thereby improving the cooling effect.

In the above embodiment, in order to further improve the cooling effect, it is preferable that the air guiding mechanism 21 is respectively disposed at two ends of the other diagonal of the cooling chamber 3, as shown in fig. 5, the air guiding mechanism 21 includes a fixing rod 42 and a concave curved plate 41 which are connected in sequence, the fixing rod 42 is fixed on the inner wall of the cooling chamber 3, and the curved plate 41 faces the fixing component 7; this allows the air guide mechanism 21 to transmit the cooling source to the hot die steel as much as possible, thereby improving the cooling effect.

On the basis of the above embodiment, in order to realize stable and rapid supply of the cooling source, it is preferable that the air cooling unit 13 is connected to the cold air supply unit through an air inlet pipe 15, a plurality of air blowing pipes 14 are disposed on a side of the air cooling unit 13 facing the fixing assembly 7, and the air blowing pipes 14 face the hot work die steel.

In the present invention, in order to fully utilize energy, it is preferable that the heat treatment processing apparatus further includes a preheating chamber 40, and the preheating chamber 40 is connected to the air outlet 22; the cooling source discharged from the air outlet 22 contains a large amount of heat, and in order to avoid waste of heat, the hot work die steel may be preheated in the preheating unit 8 and then heated in the heat treatment chamber 2, thereby improving the energy utilization rate.

In addition, in order to heat the heat treatment chamber 2, preferably, a preheating unit 8 is arranged in the heat treatment chamber 2; the heating mode of the preheating unit 8 may also be varied, and for convenience of operation, electric heating is preferred.

Finally, in the present invention, the specific structure of the isolation door 9 is not particularly limited, the isolation door 9 can move up and down, and can move back and forth, for convenience of operation, it is preferable that two side walls of the inner cavity of the isolation door 9 are respectively provided with a rack 11, and a door driving unit 10 is arranged in the isolation door 9; the driving wheel of the door driving unit 10 is engaged with the rack 11 to drive the isolation door 9 to reciprocate up and down. Therefore, as long as the driving unit 10 (such as a motor) is started, the up-and-down movement of the sealing door 9 can be realized under the driving of the rack 11.

The invention is further illustrated by the following examples. The hot-work die steel used in the following examples was hot-work die steel DHA-WORLD having a gauge of 196X 767X 822 mm.

Example 1

1) Fixing the hot-work die steel between the pair of lifting plates 30, enabling the ejector pins 32 to abut against the hot-work die steel (one of the lifting plates 30 is in clearance fit with the hot-work die steel), opening the sealing door 9, starting the platform rotation driving part 6 to drive the rotating platform 5 to enable the hot-work die steel to be located in the heat treatment cavity 2, and closing the sealing door 9 to block the heat treatment cavity 2 and the cooling cavity 3;

2) starting a preheating unit 8 to carry out aggressive heating on the hot die steel, heating to 680 ℃ at a heating rate of 80 ℃/h, preserving heat for 10h, heating to 850 ℃ at a heating rate of 60 ℃/h, preserving heat for 10h, heating to 1030 ℃ at a heating rate of 50 ℃/h, and preserving heat for 10 h;

3) opening the sealing door 9, starting the platform rotation driving part 6 to drive the rotation platform 5 to enable the hot work die steel to be positioned in the cooling cavity 3, and closing the sealing door 9 to block the heat treatment cavity 2 and the cooling cavity 3; adjusting the air intake and the air intake pressure of the air cooling unit 13 to carry out multistage cooling;

when the temperature of the hot work die steel is 1030-600 ℃, the cooling rate is 6.5 ℃/min; when the temperature of the hot work die steel is 600-400 ℃, the cooling rate is 4.5 ℃/min; when the temperature of the hot work die steel is 400-250 ℃, the cooling rate is 4.0 ℃/min.

During the cooling process, the lifting plate 30 is turned over once every 10min under the cooperation of the turning and rotating unit 36, the turning and rotating shaft 37, the turning and stretching unit 38, the turning and stretching shaft 39 and the fixed plate rotating shaft 25; when the lifting plate 30 is located below the turning telescopic unit 38, the rotation of the lifting plate 30 is stopped, and the lifting plate 30 rotates 5 ° at each time under the cooperation of the clamping rotating unit 17, the clamping rotating shaft 18, the clamping telescopic unit 19, the clamping telescopic shaft 20 and the rotating connecting seat 31, so that the rotating connecting seat 31 is far away from the rotating connecting seat 31 under the driving of the turning telescopic unit 38 after the rotation of the lifting plate 30 is completed.

4) Discharging and cooling: when the temperature of the central part of the hot die steel is cooled to below 250 ℃, the hot die steel is taken out from the device and is cooled by air.

5) And (3) tempering the hot die steel for 3 times at 570-580 ℃.

Comparative example 1

The procedure is followed as in example 1, with the only difference that in step 3), the gripping and rotating assembly 16 (i.e. the gripping and rotating unit 17, the gripping and rotating shaft 18, the gripping and telescoping unit 19 and the gripping and telescoping shaft 20) is not activated, i.e. the lifting plate 30 is not rotated.

Comparative example 2

The process according to example 1 is carried out, with the only difference that in step 3) the gripping and rotating assemblies 16 (i.e. gripping and rotating unit 17, gripping and rotating shaft 18, gripping and telescoping unit 19 and gripping and telescoping shaft 20) and the flipping assemblies 12 (i.e. flipping and rotating unit 36, flipping and rotating shaft 37, flipping and telescoping unit 38 and flipping and telescoping shaft 39) are not activated, i.e. the lifting plate 30 is not rotated and flipped.

Detection example 1

1) Hardness (HRC) test: the hardness is obtained by adopting a 150Kg load and a diamond cone pressing device; 100 pieces of hot-work die steel were processed in each example, and the hardness of the processed products was measured and then averaged.

2) 100 pieces of hot-work die steel were processed in each example, and the number of pieces having cracks in the final product was counted. Specific results are shown in table 1.

TABLE 1

	Example 1	Comparative example 1	Comparative example 2
				Average Hardness (HRC)	45.8	44.3	44.0
Number of cracked pieces	1	3	9

According to the above embodiment, the heat treatment processing device provided by the invention can improve the hardness of the hot work die steel and reduce the cracking probability of the hot work die steel.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.