阅读说明：本技术 一种轻合金宽幅薄板的成型装置及其加工方法 (Forming device and processing method of light alloy wide sheet ) 是由 胡红军 梁鹏程 章欧 胡刚 田野 李兴林 干松林 洪兴 张丁非 代俊林 于 2021-01-06 设计创作，主要内容包括：本发明公开了一种轻合金宽幅薄板的成型装置,包括相对应设置的凹模和凸模,所述凹模内设置有用于存放坯料的料筒,所述料筒外套有对坯料进行加热的加热线圈,所述料筒底部设置有呈螺旋结构的成型件；所述凸模上连接有多根朝向凹模的传力轴,所述传力轴上设置有用于挤压坯料的下压件,所述下压件的结构与所述成型件的结构相同,且所述下压件的实体部分对应成型件的空心部分,使得下压件的实体部分挤压坯料至成型件的空心部分内时,所述下压件的实体部分与成型件的空心部分重合,并在所述下压件的空心部分和成型件的空心部分各自挤压形成一卷螺旋状的板料,所述板料展开形成镁合金宽幅薄板。(The invention discloses a forming device of a light alloy wide sheet, which comprises a female die and a male die which are arranged correspondingly, wherein a charging barrel for storing blanks is arranged in the female die, a heating coil for heating the blanks is sleeved outside the charging barrel, and a formed part in a spiral structure is arranged at the bottom of the charging barrel; be connected with many biography power axles towards the die on the terrace die, be provided with the piece that pushes down that is used for extrudeing the blank on the biography power axle, the structure of piece that pushes down with the structure of formed part is the same, just the entity part of piece that pushes down corresponds the hollow part of formed part for when the entity part of piece that pushes down extrudees blank to the hollow part of formed part in, the entity part of piece and the hollow part coincidence of formed part that pushes down, and the hollow part of piece and the hollow part of formed part respectively extrude and form a spiral helicine sheet material down, the sheet material expandes and forms magnesium alloy broad width sheet metal.)

1. The utility model provides a forming device of light alloy broad width sheet metal, includes corresponding die and the terrace die that sets up, be provided with the feed cylinder that is used for depositing the blank in the die, its characterized in that: a heating coil for heating the blank is sleeved outside the charging barrel, and a forming part in a spiral structure is arranged at the bottom of the charging barrel; be connected with many biography power axles towards the die on the terrace die, be provided with the piece that pushes down that is used for extrudeing the blank on the biography power axle, the structure of piece that pushes down with the structure of formed part is the same, just the entity part of piece that pushes down corresponds the hollow part of formed part for when the entity part of piece that pushes down extrudees blank to the hollow part of formed part in, the entity part of piece and the hollow part coincidence of formed part that pushes down, and the hollow part of piece and the hollow part of formed part respectively extrude and form a spiral helicine sheet material down, the sheet material expandes and forms magnesium alloy broad width sheet metal.

2. The forming device of a light alloy broad width sheet according to claim 1, wherein the solid part of the lower pressing member is composed of a plurality of male die forming rings, the gap between each male die forming ring is a male die spacing ring, the solid part of the forming member is composed of a plurality of female die forming rings, the gap between each female die forming ring is a female die spacing ring, the female die spacing rings correspond to the male die forming rings, the male die spacing rings correspond to the female die forming rings, each female die spacing ring and each male die spacing ring respectively form an annular region for extruding a blank, and each annular region is overlapped to form a spiral sheet.

3. The forming device for the light alloy wide sheet as claimed in any one of claims 1 to 2, wherein a fixing plate for supporting the punch is provided on a side of the punch away from the force transmission shaft, and the fixing plate is connected with a driving member for driving the punch to reciprocate.

4. The forming device of a light alloy wide thin plate as claimed in any one of claims 1 to 2, wherein the side of the female die away from the charging barrel is provided with a base for supporting the female die, the middle of the base is provided with a through hole, and the through hole corresponds to the position of the forming member.

5. The forming apparatus of a light alloy wide thin plate as claimed in any one of claims 3 or 4, wherein the force transmission shaft is of a cylindrical structure, and more than one force transmission shaft is detachably connected with the lower pressing member.

6. The forming apparatus of a light alloy wide thin plate as claimed in claim 5, further comprising a temperature control device electrically connected to the heating coil.

7. The forming apparatus of a light alloy wide thin plate as claimed in claim 6, wherein the temperature control means includes a temperature sensor disposed in the cavity die and used for measuring the temperature of the blank, a temperature controller connected to the temperature controller, and a power supply for supplying power to the temperature sensor and the temperature sensor, and the temperature controller is connected to the heating coil.

8. The processing method of the light alloy wide sheet is characterized by comprising the following steps of:

the method comprises the following steps: placing the blank in a heating furnace, heating to the process temperature of 350-450 ℃, simultaneously, starting a heating coil to preheat a formed part of a female die, and keeping the temperature at 10 ℃ lower than the temperature of the blank;

step two: placing the blank heated in the step one in a material cylinder of a female die, and meanwhile, starting a temperature control device to adjust the heating temperature of a heating coil;

step three: starting a driving piece, and driving a force transmission shaft by the driving piece to extrude and form the blank;

step four: and after the forming is finished, the driving piece returns, the plate is taken out and unfolded, and a new blank is placed for forming.

9. The method as claimed in claim 8, wherein the sheet material formed in the die is taken out of the die opening of the die in step four, indicating that the extrusion is completed, and the sheet material formed is directly taken out and spread to form the magnesium alloy broad sheet.

10. The method for processing a light alloy wide thin plate according to claim 9, wherein in the fourth step, the plate material of the lower pressing member in the male die is removed by detaching the force transmission shaft and unfolded to form the magnesium alloy wide thin plate.

Technical Field

The invention relates to the technical field of light alloy plate forming, in particular to a forming device and a processing method of a light alloy wide sheet.

Background

Magnesium alloys are receiving more and more attention as important new engineering materials. But the existing use condition does not exert the potential advantages of the traditional method, and the scale of the practical industrial application is small. The crystal structure of the magnesium alloy is a close-packed hexagonal structure, and the plastic forming capability at room temperature is poor, so that the magnesium alloy is greatly restricted in practical application. Magnesium alloy products are divided into cast magnesium alloys and wrought magnesium alloys, which are mainly used for refining structures and improving properties, such as rolling, extrusion and the like, through thermal deformation. Compared with cast magnesium alloy, the wrought magnesium alloy has better comprehensive mechanical property, better meets various requirements in industrial application, and has development potential and application space. At present, most magnesium alloy products are die-cast, but the types of the products of castings are few, the performance is not ideal enough, and the structure defect easily exists, so that the application range of the magnesium alloy is greatly restricted. Therefore, the development of the wrought magnesium alloy is promoted to have important significance.

At present, the magnesium alloy wide plate in industrial production is produced by performing reciprocating hot rolling on the plate subjected to hot extrusion cogging, wherein the extrusion deformation mode adopts a one-way extrusion mode, so that the problems of limited grain refining capacity, uneven structure and even cracks are easy to occur, and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a forming device and a processing method for a light alloy wide sheet, which can directly obtain a plurality of magnesium alloy wide sheets in an extrusion mode, improve the production efficiency, simultaneously enable the blank to generate obvious dynamic recrystallization, greatly improve the refining effect of magnesium alloy grains, and improve the comprehensive performance of magnesium alloy, thereby obtaining the magnesium alloy wide sheet with uniform structure and optimized performance.

The technical scheme adopted by the invention is as follows:

a forming device for a light alloy wide sheet comprises a female die and a male die which are arranged correspondingly, wherein a charging barrel for storing blanks is arranged in the female die, a heating coil for heating the blanks is sleeved outside the charging barrel, and a forming part in a spiral structure is arranged at the bottom of the charging barrel; be connected with many biography power axles towards the die on the terrace die, be provided with the piece that pushes down that is used for extrudeing the blank on the biography power axle, the structure of piece that pushes down with the structure of formed part is the same, just the entity part of piece that pushes down corresponds the hollow part of formed part for when the entity part of piece that pushes down extrudees blank to the hollow part of formed part in, the entity part of piece and the hollow part coincidence of formed part that pushes down, and the hollow part of piece and the hollow part of formed part respectively extrude and form a spiral helicine sheet material down, the sheet material expandes and forms magnesium alloy broad width sheet metal.

The principle and the beneficial effect of the scheme are that:

in the scheme, the lower pressing piece and the formed part have the same structure and are both in a spiral structure, so that the solid part of the lower pressing piece corresponds to the hollow part of the formed part, and the hollow part of the lower pressing piece corresponds to the solid part of the formed part, so that when the lower pressing piece extrudes a blank to the formed part, the blank flows to the hollow part of the lower pressing piece and the hollow part of the formed part due to extrusion, two spiral plates can be simultaneously produced by one-step forming, and the plates are unfolded to form the magnesium alloy wide thin plate; in addition, because the blank pair in the scheme is extruded in two directions, the magnesium alloy wide plate can be subjected to remarkable dynamic recrystallization, the refining effect of magnesium alloy grains is greatly improved, the comprehensive performance of the magnesium alloy is improved, and the magnesium alloy wide plate with uniform structure and optimized performance is obtained.

Further, the entity part of pushing down the piece forms for a plurality of terrace die shaping rings, and the clearance between every terrace die shaping ring is terrace die interval ring, the entity part of forming piece forms for a plurality of die shaping rings, and the clearance between every die shaping ring is die interval ring, die interval ring with terrace die shaping ring is corresponding, terrace die interval ring is corresponding with die shaping ring, and every die interval ring and terrace die interval ring all form respectively and supply the blank to extrude into the annular region, and the stack of every annular region forms the heliciform sheet material.

When the scheme is used for forming, the male die forming ring is matched with the female die spacing ring to form a first specific forming path of the blank, the female die forming ring is matched with the male die spacing ring to form a second specific forming path of the blank, so that the first path of the plate material is formed in the lower pressing piece extrusion of the forming piece, and the other plate material is formed in the second path at the same time, and the processing cost can be saved.

Furthermore, a fixing plate for supporting the male die is arranged on the side face, far away from the force transmission shaft, of the male die, and the fixing plate is connected with a driving piece for driving the male die to reciprocate. The male die is fixed on the driving piece through the fixing plate, and the driving piece drives the male die to extrude and form the blank placed in the charging barrel in a certain stroke.

Further, the side that the feed cylinder was kept away from to the die is provided with the base that is used for supporting the die, the base middle part is provided with the through-hole, the through-hole with the formed part position is corresponding. By the design, after the blank in the female die is extruded, the plate formed by the forming part enters the through hole in the base, and the plate is taken out through the through hole.

Further, the power transmission shaft is of a cylindrical structure, and more than one power transmission shaft is detachably connected with the lower pressing piece. By the arrangement, formed plates can be conveniently taken out of the male die.

Further, still include temperature control device, temperature control device electricity is connected the heating coil. The current of the heating coil is controlled by the temperature data fed back by the temperature control device, so that the heating temperature is controlled, the blank is heated within a certain temperature range, and the refining effect of the magnesium alloy crystal grains is improved.

Further, temperature control device includes temperature sensor, temperature controller and for the power of temperature sensor and temperature sensor power supply, temperature sensor sets up in the die, and is used for measuring the blank temperature, temperature sensor with temperature controller links to each other, temperature controller with heating coil links to each other. The principle is that the components are connected, the temperature sensor is placed in the female die to directly measure temperature data, the other end of the temperature sensor is connected to the temperature controller, the measured temperature data is fed back to the temperature controller, and the temperature controller controls the current input into the heating coil according to the temperature change so as to control the temperature.

A processing method of a light alloy wide thin plate comprises the following steps:

the method comprises the following steps: placing the blank in a heating furnace, heating to the process temperature of 350-450 ℃, simultaneously, starting a heating coil to preheat a formed part of a female die, and keeping the temperature at 10 ℃ lower than the temperature of the blank;

step two: placing the blank heated in the step one in a material cylinder of a female die, and meanwhile, starting a temperature control device to adjust the heating temperature of a heating coil;

step three: starting a driving piece, and driving a force transmission shaft by the driving piece to extrude and form the blank;

step four: and after the forming is finished, the driving piece returns, the plate is taken out and unfolded, and a new blank is placed for forming.

Further, in the fourth step, the sheet material of the formed part in the female die comes out from the die opening of the female die, namely the extrusion is finished, and the sheet material of the formed part is directly taken out and unfolded to form the magnesium alloy wide sheet.

And further, in the fourth step, the sheet material of the lower pressing piece in the male die is taken out by disassembling the force transmission shaft and is unfolded to form the magnesium alloy wide sheet.

Compared with the prior art, the invention has the following advantages:

1. the invention utilizes the forming method of forming the wide plate by matching between the male die and the female die to form bidirectional extrusion on the blank, so that the blank is extruded for many times, the blank can be subjected to obvious dynamic recrystallization, the refining effect of magnesium alloy grains is greatly improved, the comprehensive performance of the magnesium alloy is improved, and the magnesium alloy wide plate with uniform tissue and optimized performance is obtained.

2. The invention can simultaneously form two sheets by one-time processing, thereby not only improving the production efficiency, but also improving the utilization rate of materials, saving the cost and increasing the benefit.

3. The female die and the male die in the invention have the same structure and simple structure, so that the blank forming process is simple and safe, the production cost is low, and the female die and the male die can be directly produced by matching with a hydraulic press; the plate prepared by the method can be continuously and stably produced, has short production period, greatly improves the production efficiency, and is convenient to realize automation.

4. The male die and the female die of the spiral structure are formed by a plurality of forming rings, so that a plate far exceeding the size of the die can be formed by utilizing the smaller die volume, the size of the die is reduced, and the forming cost is reduced.

5. In the processing process, the blank can be greatly deformed, and then a large amount of strain is generated, because the blank is formed at the recrystallization temperature of the raw material generally, the dynamic recrystallization degree of the blank in the forming process can be accelerated by accumulating more strain amounts, the deepening of the dynamic recrystallization degree can enable the crystal grains of the plate to have more equiaxed crystal grains, the generation of coarse crystal grains is reduced, and the plate has better plasticity and higher strength.

Drawings

Fig. 1 is a sectional view of a forming apparatus for a light alloy wide sheet and a method of processing the same according to the present invention.

Fig. 2 is a half sectional view of the forming portion of the male mold and the female mold in fig. 1.

Fig. 3 is a top view of the lower male die member of fig. 1.

Fig. 4 is a top view of the female mold part of fig. 1.

FIG. 5 is an isometric view of the magnesium alloy sheet of FIG. 1.

FIG. 6 is a view of a wide plate of the magnesium alloy sheet of FIG. 5.

In the figure: the device comprises a fixed plate 1, a male die 2, a force transmission shaft 3, a lower pressing piece 4, a charging barrel 5, a blank 6, a heating coil 7, a female die 8, a formed piece 9, a base 10, a male die spacing ring 11, a female die forming ring 12, a male die forming ring 13 and a female die spacing ring 14.

Detailed Description

The invention will be further explained with reference to the drawings and the embodiments.

In this embodiment: referring to fig. 1 and 2, the forming device for the light alloy wide sheet comprises a female die 8 and a male die 2 which are correspondingly arranged, wherein a charging barrel 5 for storing a blank 6 is arranged in the female die 8, and a forming part 9 in a spiral structure is arranged at the bottom of the charging barrel 5; be connected with many biography power axles 3 towards die 8 on the terrace die 2, wherein, biography power axle 3 is cylindrical structure, and more than one of them biography power axle 3 is for dismantling the connection with pushing down 4, sets up like this, conveniently takes out the sheet material of shaping from terrace die 2.

The force transmission shaft 3 is provided with a lower pressing member 4 for extruding the blank 6, referring to fig. 3 and 4, the structure of the lower pressing member 4 is the same as that of the formed part 9, and the solid part of the lower pressing member 4 corresponds to the hollow part of the formed part 9, wherein the solid part of the lower pressing member 4 is composed of a plurality of male die forming rings 13, the gap between each male die forming ring 13 is a male die spacing ring 11, the solid part of the formed part is composed of a plurality of female die forming rings 12, the gap between each female die forming ring 12 is a female die spacing ring 14, the female die spacing rings 14 correspond to the male die forming rings 13, the male die spacing rings 11 correspond to the female die forming rings 12, and each female die spacing ring 14 and each male die spacing ring 11 respectively form an annular region for extruding the blank 6, and each annular region is overlapped to form a spiral plate.

Referring to fig. 5, when the punch forming ring 13 of the lower pressing member 4 presses the blank 6 into the die spacing ring 14 of the forming member 9, the punch forming ring 13 of the lower pressing member 4 coincides with the die spacing ring 14 of the forming member 9, and a coil of spiral sheet material is formed by pressing in the annular region of the lower pressing member 4 and the annular region of the forming member 9, respectively, and the sheet material is unfolded to form a magnesium alloy wide sheet, referring to fig. 6.

In addition, a base 10 for supporting the female die 8 is arranged on the side face, away from the charging barrel 5, of the female die 8, a through hole is formed in the middle of the base 10 and corresponds to the position of the formed part 9, so that after the blank 6 in the female die 8 is extruded, the plate formed by the formed part 9 enters the through hole in the base 10, and the plate is taken out through the through hole.

And the side of the male die 2 far away from the force transmission shaft 3 is provided with a fixing plate 1 for supporting the male die 2, the fixing plate 1 is connected with a driving piece for driving the male die 2 to reciprocate, the driving piece adopts a hydraulic press and other modes, wherein the running speed or the extrusion speed of the driving piece does not exceed 1mm/s, the male die 2 is fixed on the hydraulic press through the fixing plate 1 and a connecting screw, and the hydraulic press drives the male die 2 to extrude and form a blank 6 placed in a charging barrel 5 in a certain stroke.

And feed cylinder 5 overcoat has heating coil 7 that heats blank 6, and simultaneously, this device still includes temperature control device, and wherein, temperature control device includes temperature sensor, temperature controller and for the power of temperature sensor and temperature sensor power supply, and temperature sensor sets up in die 8, and is used for measuring the 6 temperatures of blank, and temperature sensor links to each other with temperature controller, and temperature controller links to each other with heating coil 7.

The principle is that the components are connected, the temperature sensor is placed in the female die 8 and used for directly measuring temperature data, the other end of the temperature sensor is connected to the temperature controller, the measured temperature data is fed back to the temperature controller, the current of the heating coil 7 is controlled through the temperature data fed back by the temperature controller, the heating temperature is further controlled, the blank 6 is heated within a certain temperature range, and the refining effect of magnesium alloy grains is improved.

The principle of the invention is as follows:

according to the invention, the lower pressing piece 4 and the formed piece 9 are identical in structure and are both in a spiral structure, so that when the blank 6 is extruded, the male die forming ring 13 is matched with the female die spacing ring 14 to form a specific forming first path of the blank 6, the female die forming ring 12 is matched with the male die spacing ring 11 to form a specific forming second path of the blank 6, and further, the formed piece forms a first path plate material in the extrusion of the lower pressing piece 4, and the other plate material is formed in the second path at the same time, so that the processing cost can be saved.

In addition, because the blank 6 in the scheme is subjected to bidirectional extrusion, the magnesium alloy wide sheet can be subjected to remarkable dynamic recrystallization, the refining effect of magnesium alloy grains is greatly improved, the comprehensive performance of the magnesium alloy is improved, and the magnesium alloy wide sheet with uniform structure and optimized performance is obtained.

A processing method of a light alloy wide thin plate comprises the following steps:

the method comprises the following steps: placing the blank 6 in a heating furnace to be heated to the process temperature of 350-450 ℃, simultaneously, starting a heating coil 7 to preheat a formed part 9 of a female die 8, and keeping the temperature to be 10 ℃ lower than the temperature of the blank 6;

step two: placing the blank 6 heated in the step one in a charging barrel 5 of a female die 8, and simultaneously starting a temperature control device to adjust the heating temperature of a heating coil 7;

step three: starting a driving piece, and driving the force transmission shaft 3 by the driving piece to extrude and form the blank 6;

step four: and after the forming is finished, returning the driving piece, taking out the plate and unfolding the plate, then putting a new blank 6 into the blank, and forming, wherein the plate of the forming piece 9 in the female die 8 comes out of the die orifice of the female die 8, namely the extrusion is finished, directly taking out the plate of the forming piece 9 and unfolding the plate to form a magnesium alloy wide thin plate, the plate of the lower pressing piece 4 in the male die 2, and taking out the plate of the lower pressing piece 4 by disassembling the force transmission shaft 3 and unfolding the plate to form the magnesium alloy wide thin plate.

During the processing, the blank 6 may be greatly deformed, and then a large amount of strain is generated, because the blank is generally formed at the recrystallization temperature of the raw material, the dynamic recrystallization degree of the blank 6 during the forming is accelerated by accumulating a large amount of strain, and the increase of the dynamic recrystallization degree can make the crystal grains of the plate possess more equiaxed crystal grains, reduce the generation of coarse crystal grains, and make the plate possess better plasticity and higher strength.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.