阅读说明：本技术 一种汽车钣金冲压模具 (Automobile metal plate stamping die ) 是由 杨志强 朱文涛 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种汽车钣金冲压模具,包括凸辊和凹辊,所述凸辊与凹辊相配合,所述凸辊包括转动轴,所述转动轴的中间部位设置有环形槽,所述环形槽的底部转动轴上设置有多个一号T形槽、二号T形槽和容腔,所述一号T形槽与二号T形槽内均通过多块卡块固定有一号凸台,所述容腔内滑动连接有二号凸台。本发明利用凸辊与凹辊滚轧的方式来生产多台阶的钣金件,取代了传统工艺中利用模具来得到多台阶的钣金件的方式,且该方式能利用长件钣金做到连续生产多台阶的钣金件,减少了装夹板材和拆卸板材的次数,提高了生产速率；通过调整一号凸台在凸辊上的位置,进而实现调整多台阶的钣金件的尺寸,减少了生产不同尺寸模具的成本。(The invention discloses an automobile sheet metal stamping die which comprises a convex roller and a concave roller, wherein the convex roller is matched with the concave roller, the convex roller comprises a rotating shaft, an annular groove is formed in the middle of the rotating shaft, a plurality of first T-shaped grooves, second T-shaped grooves and a containing cavity are formed in the rotating shaft at the bottom of the annular groove, a first boss is fixed in each of the first T-shaped grooves and the second T-shaped grooves through a plurality of clamping blocks, and a second boss is connected in the containing cavity in a sliding mode. The multi-step sheet metal part is produced by rolling the convex roller and the concave roller, the mode that the multi-step sheet metal part is obtained by using a die in the traditional process is replaced, and the mode can continuously produce the multi-step sheet metal part by using a long sheet metal, so that the times of clamping and disassembling the sheet are reduced, and the production rate is improved; the size of the multi-step sheet metal part can be adjusted by adjusting the position of the first boss on the convex roller, and the cost for producing dies with different sizes is reduced.)

1. The utility model provides an automobile panel beating stamping die, includes protruding roller (1) and concave roller (2), its characterized in that: the convex roller (1) is matched with the concave roller (2), the convex roller (1) comprises a rotating shaft (11), one end of the rotating shaft (11) is fixed with an output shaft of a motor (3), a first oil way (12) and a plurality of second oil ways (13) are arranged in the rotating shaft (11), an annular groove (14) is arranged in the middle of the rotating shaft (11), a plurality of first T-shaped grooves (15), second T-shaped grooves (16) and a containing cavity (17) are arranged on the rotating shaft (11) at the bottom of the annular groove (14), the first T-shaped grooves (15) and the second T-shaped grooves (16) are identical in size, shape and number, the first T-shaped grooves (15) and the second T-shaped grooves (16) are symmetrically arranged relative to the containing cavity (17), and the first T-shaped grooves (15), the second T-shaped grooves (16) and the containing cavity (17) are uniformly arranged along the circumferential direction of the rotating shaft (11), a boss (5) is fixed with through a plurality of fixture blocks (4) in T-shaped groove (15) and No. two T-shaped grooves (16), hold No. two boss (6) of sliding connection in chamber (17), No. one T-shaped groove (15), No. two T-shaped groove (16) and hold the top and the bottom of chamber (17) and equally divide and do not communicate with No. two oil circuit (13) and an oil circuit (12).

2. The automobile sheet metal stamping die according to claim 1, characterized in that: the first boss (5) comprises a piston (51), a piston rod (52), a reinforcing plate (53) and an extrusion plate (54), the piston (51) is fixed at the bottom end of the piston rod (52), the top end of the piston rod (52) is in contact with the extrusion plate (54), the reinforcing plate (53) is fixed on the outer surface of the piston rod (52), and the reinforcing plate (53) is fixedly connected with the extrusion plate (54) through a screw.

3. The automobile sheet metal stamping die according to claim 2, characterized in that: the first boss (5) and the second boss (6) are identical in structure, and the difference between the first boss and the second boss is that the first boss (5) further comprises a cylinder body (55) and a universal connecting pipe (56), a piston (51) is connected in the cylinder body (55) in a sliding mode, and the bottom end of the cylinder body (55) is communicated with the first oil way (12) through the universal connecting pipe (56).

4. The automobile sheet metal stamping die according to claim 2, characterized in that: the piston (51) is in an inverted T shape, and the diameter of the top end of the piston (51) is larger than that of the piston rod (52).

5. The automobile sheet metal stamping die according to claim 2, characterized in that: the extrusion plates (54) are customized into a set according to the size, the extrusion plates (54) are arc-shaped, a plurality of extrusion plates (54) can be combined into a complete circle, and the extrusion plates (54) are made of high manganese steel.

6. The automobile sheet metal stamping die according to claim 3, characterized in that: the diameter of the cylinder body (55) is the same as that of the accommodating cavity (17), and the height of the cylinder body (55) is smaller than the depth of the accommodating cavity (17).

7. The automobile sheet metal stamping die according to claim 1 or 3, wherein: the width of the fixture block (4) and the width of the cylinder body (55) are equal to the width of the first T-shaped groove (15), the fixture block (4) is made into a set according to the size, an oil pipe (41) is arranged inside the fixture block (4), a sealing ring (42) is arranged on the position, located on the oil pipe (41), of the fixture block (4), one end of the oil pipe (41) is communicated with the second oil way (13), and the other end of the oil pipe (41) is communicated with the cylinder body (55).

8. The automobile sheet metal stamping die according to claim 3, characterized in that: the universal connecting pipe (56) is made of nitrile rubber.

9. The automobile sheet metal stamping die according to claim 1, characterized in that: be provided with T shape annular (21) on concave roller (2), the side of T shape annular (21) is provided with compensating part (22), compensating part (22) are used for compensating the clearance between adjustment stripper plate (54) back a boss (5) and No. two boss (6) and T shape annular (21).

10. The automobile sheet metal stamping die according to claim 9, characterized in that: the compensation part (22) comprises a plurality of first half rings (221) and a plurality of second half rings (222), wherein the first half rings (221) and the second half rings (222) are overlapped together, the first half rings and the second half rings are connected end to form a complete ring, and the first half rings (221) and the second half rings (222) are fixedly connected with the rotating shaft (11) through screws.

Technical Field

The invention relates to the technical field of dies, in particular to an automobile metal plate stamping die.

Background

The sheet metal, a processing technology, has not yet a relatively complete definition. According to a definition in a professional journal abroad, the term can be defined as: the sheet metal is a comprehensive cold working process for sheet metal (generally below 6 mm), including shearing, punching/cutting/compounding, folding, riveting, splicing, forming (such as automobile bodies) and the like. The remarkable characteristic is that the thickness of the same part is consistent.

The sheet metal part stamping die with the publication number of CN111408663A comprises a rack, an upper template, a lower template, a first stamping die, a second stamping die and a third stamping die; the hydraulic machine and the lower die plate are arranged on the frame, the upper die plate is connected with a connecting column on the side wall of the hydraulic machine in a sliding manner, male dies of a first stamping die, a second stamping die and a third stamping die are all arranged at the bottom of the upper die plate and are sequentially arranged from the feeding end to the discharging end of the hydraulic machine, female dies of the first stamping die, the second stamping die and the third stamping die are all arranged on the lower die plate and are sequentially arranged from the feeding end to the discharging end of the hydraulic machine, the working end of the first stamping die corresponds to the contour of the connecting piece before bending and the position structures of a first mounting hole, a second mounting hole and a third mounting hole, the working end of the second stamping die corresponds to the position of a bending part, and the male die of the second stamping die is in clearance fit with the first mounting hole; the scheme has high production efficiency and good economic benefit, greatly saves manpower, but the invention still utilizes the traditional mould to process the sheet metal, when the size of the sheet metal part needs to be changed, the mould needs to be redesigned, which is not economical, and the efficiency is influenced because the traditional mould is limited by the need of clamping and disassembling the sheet metal for many times.

The invention provides a die for continuously producing multi-step sheet metal parts by using long plates, which reduces the times of clamping and disassembling the plates and improves the production rate.

Disclosure of Invention

The invention aims to solve the problem that when the size of a sheet metal part needs to be changed, a mould needs to be redesigned, which is not economical; the limitation of the traditional die needs to clamp and disassemble the metal plate for many times, and the problem of influencing the efficiency is solved.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an automobile metal plate stamping die, includes protruding roller and concave roller, protruding roller and concave roller cooperate, the protruding roller includes the axis of rotation, the one end of axis of rotation is fixed with the output shaft of motor, be provided with an oil circuit and many No. two oil circuits in the axis of rotation, the middle part of axis of rotation is provided with the ring channel, be provided with a plurality of T-slot, No. two T-slot and appearance chamber in the bottom axis of rotation of ring channel, the size, shape and the number of a T-slot and No. two T-slot are the same, a T-slot and No. two T-slot are for holding chamber symmetrical arrangement, and a plurality of a T-slot, No. two T-slot and appearance chamber are all evenly arranged along the circumferencial direction of axis of rotation, all be fixed with a boss through the polylith fixture block in a T-slot and No. two T-slot, it has No. two bosses to hold intracavity sliding connection, a T-slot, No. one T-slot, No. two T-slot, The top end and the bottom end of the second T-shaped groove and the cavity are respectively communicated with the second oil way and the first oil way.

The multi-step sheet metal part is produced by rolling the convex roller and the concave roller, so that the processes of stamping, bending and the like by using a die in the traditional process are replaced, the multi-step sheet metal part is produced by rolling, the multi-step sheet metal part can be continuously produced by using a long sheet metal, the times of clamping and disassembling the sheet metal are reduced, and the production rate is improved; the size of the multi-step sheet metal part can be adjusted by adjusting the position of the first boss on the convex roller, and the cost for producing dies with different sizes is reduced.

Preferably, the first boss comprises a piston, a piston rod, a reinforcing plate and an extrusion plate, the piston is fixed at the bottom end of the piston rod, the top end of the piston rod is in contact with the extrusion plate, the reinforcing plate is fixed on the outer surface of the piston rod and fixedly connected with the extrusion plate through screws, and the reinforcing plate is fixedly connected with the extrusion plate through screws, so that the extrusion plate is convenient to detach and mount.

Preferably, a boss is the same with the structure of No. two bosss, and the difference between them lies in, a boss still includes cylinder body and universal connecting pipe, sliding connection has the piston in the cylinder body, the bottom of cylinder body is through universal connecting pipe and an oil circuit intercommunication, conveniently carries out oil feed and oil production to the cylinder body.

Preferably, the piston is the shape of falling T, and the top diameter of piston is greater than the diameter of piston rod, prevents that the piston from being extruded the cylinder body by hydraulic oil, and the piston of the shape of falling T can provide the space for hydraulic oil extrusion piston, prevents that the piston can only rise and can not descend.

Preferably, the stripper plate is according to size customization complete set, conveniently changes the stripper plate according to the production demand, has reduced the cost of producing not unidimensional mould, the stripper plate is circular-arcly, and a plurality of stripper plates can make up and be a complete circle, the stripper plate is high manganese steel material, improves the life-span of stripper plate, improves the practicality.

Preferably, the diameter of cylinder body is the same with the diameter that holds the chamber, conveniently controls the hydraulic oil that gets into the cylinder body and hold the intracavity, and because the highly degree that is less than the appearance chamber of cylinder body, utilizes the piston to drive the piston rod and remove in cylinder body and appearance chamber, and then makes the stripper plate on boss and No. two bosses demonstrate the position of difference in height to realize rolling out the multi-step sheet metal component.

Preferably, the width of the fixture block and the width of the cylinder body are equal to the width of the first T-shaped groove, the fixture block is set in a set according to the size, an oil pipe is arranged inside the fixture block, a sealing ring is arranged on the position, located on the oil pipe, of the fixture block and used for preventing hydraulic oil from leaking, one end of the oil pipe is communicated with the second oil way, and the other end of the oil pipe is communicated with the cylinder body.

When the size of the multi-step sheet metal part needs to be adjusted, the position of the first boss in the annular groove is adjusted by replacing the fixture blocks with different sizes, and the adjacent side edges of the extrusion plates on the first boss and the second boss are always on the same plane by matching with the replacement of the extrusion plates with different sizes, so that the quality of the multi-step sheet metal part is prevented from being influenced in the rolling process.

Preferably, the universal connecting pipe is used as a guide piece for conveying hydraulic oil, the nitrile rubber is good in oil resistance, abrasion resistance and strong in tear resistance, the service environment of the universal connecting pipe is met, when the position of the first boss in the annular groove is adjusted by the aid of clamping blocks with different sizes, the position of the cylinder body is changed, and hydraulic oil can smoothly enter the cylinder body by the aid of the flexibility and the direction of the universal connecting pipe 56.

Preferably, the concave roller is provided with a T-shaped ring groove, and the side edge of the T-shaped ring groove is provided with a compensating piece.

Preferably, the compensation part comprises a plurality of first half rings and a plurality of second half rings, the first half rings and the second half rings are overlapped together to reduce adjustment errors, improve compensation precision and improve the quality of the multi-step sheet metal part, the first half rings and the second half rings are combined into a complete ring in an end-to-end mode, and the first half rings and the second half rings are fixedly connected through screws and rotating shafts, so that the compensation part can be conveniently mounted or dismounted.

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

1. the multi-step sheet metal part is produced by rolling the convex roller and the concave roller, so that the processes of stamping, bending and the like by using a die in the traditional process are replaced, the multi-step sheet metal part is produced by rolling, the multi-step sheet metal part can be continuously produced by using a long sheet metal, the times of clamping and disassembling the sheet metal are reduced, and the production rate is improved; the size of the multi-step sheet metal part can be adjusted by adjusting the position of the first boss on the convex roller, and the cost for producing dies with different sizes is reduced.

2. According to the invention, the reinforcing plate is fixedly connected with the extrusion plate through the screw, so that the extrusion plate is convenient to disassemble and assemble; the diameter of the top end of the piston is larger than that of the piston rod, so that the piston is prevented from being extruded out of the cylinder body by hydraulic oil, the inverted T-shaped piston can provide space for the hydraulic oil to extrude the piston, and the piston is prevented from only rising but not falling; when the position of the first boss in the annular groove is adjusted by the clamping blocks with different sizes, the position of the cylinder body is also changed, and hydraulic oil can smoothly enter the cylinder body by utilizing the flexibility and the adjustability in direction of the universal connecting pipe.

3. The diameter of cylinder body is the same with the diameter that holds the chamber, conveniently controls getting into the cylinder body and holding the hydraulic oil in the chamber, and highly is less than the degree of depth that holds the chamber through the cylinder body, utilizes the piston to drive the piston rod and remove in the cylinder body with holding the chamber, and then makes the stripper plate on boss and No. two bosses demonstrate the position of difference in height to the realization is rolled out the multi-step sheet metal component.

4. The position of the first boss in the annular groove is adjusted by replacing the fixture blocks with different sizes, and the adjacent side edges of the extrusion plates on the first boss and the second boss are always on the same plane by matching with the replacement of the extrusion plates with different sizes, so that the quality of a multi-step sheet metal part is prevented from being influenced in the rolling process; the compensation part is used for compensating the gap left between the first boss and the second boss and the T-shaped ring groove after the extrusion plate is adjusted, so that the quality of the rolled multi-step sheet metal part is improved.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an overall structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2 in accordance with the present invention;

FIG. 4 is a structural view of the first boss and the second boss of the present invention when retracted into the annular groove;

FIG. 5 is an enlarged view of the invention at C in FIG. 3.

Description of reference numerals: the device comprises a convex roller 1, a rotating shaft 11, a first oil way 12, a second oil way 13, an annular groove 14, a first T-shaped groove 15, a second T-shaped groove 16, a containing cavity 17, a concave roller 2, a T-shaped annular groove 21, a compensating part 22, a first half ring 221, a second half ring 222, a motor 3, a fixture block 4, an oil pipe 41, a sealing ring 42, a first boss 5, a piston 51, a piston rod 52, a reinforcing plate 53, a squeezing plate 54, a cylinder body 55, a universal connecting pipe 56 and a second boss 6.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, the present invention provides a technical solution:

a stamping die for automobile sheet metal comprises a convex roller 1 and a concave roller 2, wherein the convex roller 1 is matched with the concave roller 2, the convex roller 1 comprises a rotating shaft 11, one end of the rotating shaft 11 is fixed with an output shaft of a motor 3, a first oil way 12 and a plurality of second oil ways 13 are arranged in the rotating shaft 11, an annular groove 14 is arranged in the middle of the rotating shaft 11, a plurality of first T-shaped grooves 15, second T-shaped grooves 16 and accommodating chambers 17 are arranged on the rotating shaft 11 at the bottom of the annular groove 14, the first T-shaped grooves 15 and the second T-shaped grooves 16 are identical in size, shape and number, the first T-shaped grooves 15 and the second T-shaped grooves 16 are symmetrically arranged relative to the accommodating chambers 17, the first T-shaped grooves 15, the second T-shaped grooves 16 and the accommodating chambers 17 are uniformly arranged along the circumferential direction of the rotating shaft 11, a first boss 5 is fixed in the first T-shaped grooves 15 and the second T-shaped grooves 16 through a plurality of fixture blocks 4, the oil-gas separator is characterized in that a second boss 6 is connected in the accommodating cavity 17 in a sliding mode, and the top end and the bottom end of the first T-shaped groove 15, the second T-shaped groove 16 and the accommodating cavity 17 are respectively communicated with a second oil way 13 and a first oil way 12.

According to the invention, the multi-step sheet metal part is produced by rolling the convex roller 1 and the concave roller 2, so that the processes of stamping, bending and the like by using a die in the traditional process are replaced to obtain the multi-step sheet metal part, and the multi-step sheet metal part is produced by rolling, so that the multi-step sheet metal part can be continuously produced by using a long sheet metal, the times of clamping and disassembling the sheet metal are reduced, and the production rate is improved; the size of the sheet metal part with multiple steps can be adjusted by adjusting the position of the first boss 5 on the convex roller 1, and the cost for producing dies with different sizes is reduced.

As a specific embodiment of the present invention, the first boss 5 includes a piston 51, a piston rod 52, a reinforcing plate 53 and a pressing plate 54, the piston 51 is fixed at the bottom end of the piston rod 52, the top end of the piston rod 52 contacts with the pressing plate 54, the reinforcing plate 53 is fixed on the outer surface of the piston rod 52, the reinforcing plate 53 is fixedly connected with the pressing plate 54 through a screw, and in the present invention, the reinforcing plate 53 is fixedly connected with the pressing plate 54 through a screw, which facilitates the detachment and installation of the pressing plate 54.

As a specific embodiment of the present invention, the first boss 5 and the second boss 6 have the same structure, and the difference between the two is that the first boss 5 further includes a cylinder 55 and a universal connection pipe 56, the piston 51 is slidably connected in the cylinder 55, and the bottom end of the cylinder 55 is communicated with the first oil passage 12 through the universal connection pipe 56, so as to facilitate oil inlet and oil outlet of the cylinder 55.

In an embodiment of the present invention, the piston 51 has an inverted T shape, and the diameter of the top end of the piston 51 is larger than the diameter of the piston rod 52, so as to prevent the piston 51 from being squeezed out of the cylinder 55 by hydraulic oil, and the inverted T-shaped piston 51 can provide a space for the hydraulic oil to squeeze the piston 51, so as to prevent the piston 51 from only rising but not falling.

As a specific embodiment of the present invention, the extrusion plates 54 are customized according to the size, so that the extrusion plates 54 can be conveniently replaced according to the production requirements, the cost for producing dies with different sizes is reduced, the extrusion plates 54 are arc-shaped, a plurality of extrusion plates 54 can be combined into a complete circle, and the extrusion plates 54 are made of high manganese steel, so that the wear resistance of the extrusion plates 54 is improved, the service life of the extrusion plates 54 is prolonged, and the practicability is improved.

As a specific embodiment of the present invention, the diameter of the cylinder body 55 is the same as the diameter of the cavity 17, so that hydraulic oil entering the cylinder body 55 and the cavity 17 can be conveniently controlled, and the piston 51 drives the piston rod 52 to move in the cylinder body 55 and the cavity 17 through the height of the cylinder body 55 being smaller than the depth of the cavity 17, so that the extruding plates 54 on the first boss 5 and the second boss 6 present different height positions, thereby realizing rolling of a multi-step sheet metal part.

In summary, the second oil path 13 is fed with hydraulic oil, the first oil path 12 recovers the hydraulic oil, the hydraulic oil enters the cavity 17 and the top end of the cylinder 55 and extrudes the piston 51 to move downwards, thereby realizing that the extrusion plate 54 is retracted into the annular groove 14, the appearance of the male roller 1 is changed into a cylinder shape, then the sheet metal is placed between the male roller 1 and the female roller 2 in parallel, hydraulic oil is fed into the first oil path 12, the second oil path 13 recovers the hydraulic oil, the hydraulic oil enters the bottom ends of the cavity 17 and the cylinder body 55 and extrudes the piston 51 to move upwards, so that the extrusion plate 54 is pushed out of the annular groove 14, because the height of the cylinder body 55 is smaller than the depth of the accommodating cavity 17, the extrusion plates 54 on the first boss 5 and the second boss 6 are in different height positions, and finally the motor 3 is turned on to rotate the convex roller 1, so that the continuous rolling of the multi-step sheet metal part is realized, and the production rate is improved.

As a specific embodiment of the present invention, the width of the fixture block 4 plus the cylinder 55 is equal to the width of the first T-shaped groove 15, the fixture block 4 is set according to a size, an oil pipe 41 is disposed inside the fixture block 4, a sealing ring 42 is disposed on the fixture block 4 at the position of the oil pipe 41, the sealing ring 42 is used for preventing hydraulic oil from leaking, one end of the oil pipe 41 is communicated with the second oil passage 13, and the other end of the oil pipe 41 is communicated with the cylinder 55.

When the size of the multi-step sheet metal part needs to be adjusted, the position of the first boss 5 in the annular groove 14 is adjusted by replacing the fixture blocks 4 with different sizes, and the adjacent side edges of the extrusion plates 54 on the first boss 5 and the second boss 6 are always on the same plane by matching with the replacement of the extrusion plates 54 with different sizes, so that the quality of the multi-step sheet metal part is prevented from being influenced in the rolling process.

As a specific embodiment of the present invention, the universal connection pipe 56 is used as a guide for conveying hydraulic oil in the present invention, the nitrile rubber has good oil resistance, wear resistance and tear resistance, and meets the use environment of the universal connection pipe 56 of the present invention, and when the position of the first boss 5 in the annular groove 14 is adjusted by the size of the fixture block 4, the position of the cylinder 55 is also changed, and hydraulic oil can smoothly enter the cylinder 55 by utilizing the flexibility and the direction of the universal connection pipe 56.

In the invention, when the size of the multi-step sheet metal part needs to be adjusted, the gap left between the first boss 5 and the second boss 6 after the extrusion plate 54 is adjusted and the T-shaped ring groove 21 is compensated by the compensation piece 22, so that the quality of the rolled multi-step sheet metal part is improved.

As a specific embodiment of the present invention, the compensating part 22 includes a plurality of first half rings 221 and a plurality of second half rings 222, which are stacked together, and the stacking of the first half rings 221 and the second half rings 222 reduces an adjustment error, improves a compensation accuracy, and improves a quality of a multi-step sheet metal part, the first half rings 221 and the second half rings 222 are combined end to form a complete circular ring, and the first half rings 221 and the second half rings 222 are fixedly connected to the rotating shaft 11 by screws, so as to facilitate installation or removal of the compensating part 22.

The working principle is as follows: the pressing plate 54 is replaced according to the requirement, the pressing plate 54 with the required size is replaced on the convex roller 1 by unscrewing the screws between the reinforcing plate 53 and the pressing plate 54, at the moment, the adjacent side edges of the pressing plates 54 on the first boss 5 and the second boss 6 are not on the same plane due to the size change of the pressing plate 54, then the position of the first boss 5 in the annular groove 14 is adjusted by replacing the fixture block 4 with different sizes, so that the adjacent side edges of the extrusion plates 54 on the first boss 5 and the second boss 6 are on the same plane again, then, according to production needs, the compensation part 22 formed by combining the first half ring 221 and the second half ring 222 in a superposition mode is used, the compensation part 22 compensates for gaps left between the first boss 5 and the second boss 6 and the T-shaped ring groove 21 after the extrusion plate 54 is adjusted, and in conclusion, the size of the multi-step sheet metal part is adjusted according to production needs;

then, hydraulic oil is fed into the second oil path 13, the first oil path 12 recovers the hydraulic oil, the hydraulic oil enters the top ends of the containing cavity 17 and the cylinder body 55 and extrudes the piston 51 to move downwards, so that the extrusion plate 54 is retracted into the annular groove 14, the appearance of the convex roller 1 is changed into a cylindrical shape, then the metal plate is placed between the convex roller 1 and the concave roller 2 in parallel, the hydraulic oil is fed into the first oil path 12, the hydraulic oil is recovered from the second oil path 13, the hydraulic oil enters the bottom ends of the containing cavity 17 and the cylinder body 55 and extrudes the piston 51 to move upwards, so that the extrusion plate 54 is pushed out of the annular groove 14, the extrusion plate 54 on the first boss 5 and the second boss 6 presents different positions due to the fact that the height of the cylinder body 55 is smaller than the depth of the containing cavity 17, and finally the motor 3 is turned on to enable the convex roller 1 to rotate, so that multi-step metal plate parts are continuously rolled, and production rate is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.