CN112207180A

CN112207180A - Punching die tolerance absorption flexible structure

Info

Publication number: CN112207180A
Application number: CN202010904229.3A
Authority: CN
Inventors: 陈小刚; 李华兵
Original assignee: Guangzhou Minshi Auto Parts Co ltd
Current assignee: Guangzhou Minshi Auto Parts Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-01-12
Anticipated expiration: 2040-09-01
Also published as: CN112207180B

Abstract

The invention discloses a tolerance absorbing flexible structure of a punching die, which relates to the technical field of dies and comprises a support; the punching assembly comprises a punching punch for punching a product and a driving source for driving the punching punch to move; the flexible assembly is arranged between the support and the punching assembly and comprises a plurality of first elastic pieces, the punching assembly is installed on the support through the first elastic pieces, the flexible assembly further comprises a floating block, the lower end of each elastic piece is connected with the support, the upper end of each elastic piece is connected with the floating block, the punching assembly is installed on the floating block, a plurality of limiting bolts used for adjusting the floating stroke of the floating block are installed on the floating block, and the limiting bolts are connected onto the support after penetrating through the floating block. The invention can absorb tolerance fluctuation of radian of products, realizes flexible compatibility of different radian tolerances, and basically keeps the radian of the products before and after punching unchanged, thereby solving the problem of out-of-tolerance radian of the punched products caused by the change of the bending radian of the products.

Description

Punching die tolerance absorption flexible structure

Technical Field

The invention relates to the technical field of dies, in particular to a tolerance absorbing flexible structure of a punching die.

Background

The front door sash of a car generally comprises four parts: a post subassembly, B post subassembly, qianmen reinforcing plate and qianmen winding, the production technology of qianmen winding: rolling → bending → punching → sawing → welding, namely, after obtaining a semi-finished product by rolling and bending, punching out a gap of the semi-finished product by bending a radian of a bending die, then sawing to cut off a position reserved for clamping a chuck to obtain a front upper strip finished product, and finally welding and assembling. The rolling is to form a straight strip with a required section by rollers, and the length of the straight strip is the length of a left piece and a right piece and the length of a process supplement part (a clamping position of two end chucks and a middle butt joint position). The bending is to obtain the required radian of the semi-finished product of the straight strip and the upper strip through a bending die and punch out the positioning reference hole at the same time. The punching is to punch the notch and the hole site of the upper strip for installation and avoiding through a punching special machine, and the punching process takes the reference hole as positioning and is respectively powered by a plurality of groups of oil cylinders for punching. The sawing is to cut off the clamping end of the chuck and ensure that a certain angle is formed for splicing welding, and the sawing process takes the reference hole as a positioning reference.

However, the prior winding has the problem of radian out-of-tolerance in the punching process: firstly, the radian of the winding is obtained by bending, the YP value of the material directly influences the quality of the bending radian, the YP value is fluctuant, and the YP value of each batch of material is different, so that the radian of the winding produced by each batch is also changed, and the tolerance is within +/-0.3 mm; secondly, a plurality of holes are formed in the winding, each hole or a plurality of adjacent holes are used as a group, 1 oil cylinder is used as power to drive a punching punch to punch holes, and the hydraulic station cannot drive all the oil cylinders at the same time, so that only 1 or 2 oil cylinders are driven to work at each time; thirdly, after the radian of the upper strip changes, the upper strip is punched on a punching die of a punching special machine, the radian fluctuation of a semi-finished product is small, the semi-finished product is pressed and deformed, the radian of the semi-finished product is small, the deformation is small, the influence is avoided, the radian change of the semi-finished product is in a limit value, and the radian change of the upper strip is beyond a tolerance allowable range after the punching is finished; fourthly, because it is a minority that the semi-manufactured goods radian of winding reaches the extreme value, the back of punching a hole also a minority that the radian of winding warp is out of tolerance, so this kind of unusual product of quality is the small probability incident, and it has ten pieces all to produce down to produce a batch seriously, under the volume production circumstances, can't accomplish the product and examine entirely, so can't carry out the process management and control, bring serious influence to the quality management and control of volume production, and the problem can't be stopped, causes customer complaint.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the invention provides a tolerance absorbing flexible structure of a punching die, which can solve the problem that the radian of a punched product is out of tolerance due to the change of the bending radian of the product.

The tolerance absorbing flexible structure of the punching die comprises a support; the punching assembly comprises a punching punch for punching a product and a driving source for driving the punching punch to move; and the flexible assembly is arranged between the support and the punching assembly, the flexible assembly comprises a plurality of first elastic pieces, the punching assembly is installed on the support through each first elastic piece, the flexible assembly further comprises a floating block, the lower end of each elastic piece is connected with the support, the upper end of each elastic piece is connected with the floating block, the punching assembly is installed on the floating block, a plurality of limiting bolts used for adjusting the floating stroke of the floating block are installed on the floating block, and the limiting bolts penetrate through the floating block and then are connected to the support.

In an alternative or preferred embodiment, a plurality of guide bushing kits are provided between the support and the floating block, the guide bushing kits including a bushing mounted on the support and a guide shaft fitted with the bushing, the guide shaft mounted on the floating block.

In an alternative or preferred embodiment, a guide rail sliding part is arranged between the punching assembly and the floating block, the guide rail sliding part comprises a guide rail and a sliding block which are matched with each other, the guide rail is arranged on the floating block, and the sliding block is arranged on the punching assembly.

In an alternative or preferred embodiment, the floating block is fitted with a number of adjusting bolts for fixing the punch assembly.

In an alternative or preferred embodiment, the punching assembly includes a large slide block connected to the floating block and a pressing unit mounted on the large slide block, the pressing unit includes a lower die block and a pressing plate for clamping a product, the driving source is mounted on the large slide block, and the driving source drives the pressing plate and the punching punch to move towards the lower die block.

In an alternative or preferred embodiment, a small slide block is connected to the driving end of the driving source, the pressure plate is mounted on the small slide block through a plurality of second elastic pieces, and the punching punch is mounted on the small slide block and penetrates through the pressure plate.

In an alternative or preferred embodiment, the drive source is a cylinder.

In an alternative or preferred embodiment, the first resilient member is a spring.

Based on the technical scheme, the embodiment of the invention at least has the following beneficial effects: according to the technical scheme, when the driving source drives the punching punch to punch the product, the punching assembly can generate downward displacement, at the moment, the first elastic piece of the flexible assembly can buffer and absorb the impulse generated by the punching assembly, and the first elastic piece of the flexible assembly can recover the position of the punching assembly after punching is completed, so that the tolerance of a punching die is avoided; in addition, through setting up spacing bolt, can adjust the interval between floating block and the support, can adjust the first elasticity of first elastic component, can adjust to the different impulsive forces of punching punch. The invention can absorb tolerance fluctuation of radian of products, realizes flexible compatibility of different radian tolerances, and basically keeps the radian of the products before and after punching unchanged, thereby solving the problem of out-of-tolerance radian of the punched products caused by the change of the bending radian of the products.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a schematic structural diagram of a die of a special punching machine applied to the embodiment of the invention;

FIG. 2 is a schematic structural diagram of a die positioning product of the special punching machine;

FIG. 3 is a schematic structural diagram of an embodiment of the present invention;

FIG. 4 is a schematic diagram of the construction of a punch assembly in an embodiment of the present invention;

FIG. 5 is an exploded view of a small slider and a swage plate in an embodiment of the invention;

FIG. 6 is a schematic structural view of an embodiment of the present invention illustrating the assembly of a flexible component with a support;

FIG. 7 is a schematic structural view of an embodiment of the present invention showing the assembly of a flexible assembly with a support, wherein the floating block is not shown;

FIG. 8 is a schematic view of a joint of a flexible component in an embodiment of the invention;

FIG. 9 is a cross-sectional view of a flexible component assembled with a support in an embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 9, a punching die tolerance absorbing flexible structure 300 according to an embodiment of the present invention is described, and the punching die tolerance absorbing flexible structure 300 may be used in a die of a punching special machine.

Referring to fig. 1 and 2, the punch-only die includes a base 101, a locating clamp assembly 200, and a punch die tolerance absorbing compliant structure 300. Wherein, a plurality of positioning and clamping assemblies 200 are installed on the base 101 for clamping the product 110, as shown in fig. 2. Specifically, the positioning and clamping assembly 200 includes a bracket, a positioning pin mounted on the bracket, and a clamping block for clamping the product, which is prior art and will not be described in detail.

Referring to fig. 3 to 9, the punching die tolerance absorbing flexible structure according to the embodiment of the present invention includes a holder 311, a punching assembly 330, and a flexible assembly 320.

As shown in fig. 4 and 5, the punching assembly 330 includes a punch 334 for punching the product 110 and a driving source 336 for driving the punch 334 to move. Specifically, the punching assembly 330 further includes a large slider 331 connected to the floating block 321, and a pressing unit mounted on the large slider 331, the pressing unit includes a lower module 335 and a pressing plate 333 for clamping the product 110, the driving source 336 is mounted on the large slider 331, and the driving source 336 drives the driving source to connect the pressing plate 333 and the punching punch 334 and to move the two in the direction of the lower module 335.

The driving source 336 is an oil cylinder, and referring to fig. 5, the driving end of the driving source 336 is connected with a small slide block 332, the material pressing plate 333 is installed on the small slide block 332 through a plurality of second elastic members 337, the second elastic members 337 are springs, and the punching punch 334 is installed on the small slide block 332 and penetrates through the material pressing plate 333. It can be understood that, after the driving source 336 drives the small slide block 332 to drive the material pressing plate 333 to clamp the product 110, the piston rod of the driving source 336 continues to extend, the punching punch 334 on the small slide block 332 penetrates through the material pressing plate 333 to punch the product 110, and the second elastic member 337 is compressed.

When the driving source 336 punches the product 110, the punching assembly 330 is displaced downward, and at this time, the flexible assembly 320 is used for absorbing the impulse generated by the punching assembly 330, the flexible assembly 320 is disposed between the support 311 and the punching assembly 330, the flexible assembly 320 includes a plurality of first elastic members 322, and the punching assembly 330 is mounted on the support 311 through each first elastic member 322. Specifically, the flexible assembly 320 further comprises a floating block 321, the lower end of the first elastic member 322 is connected with the support 311, the upper end of the first elastic member 322 is connected with the floating block 321, the punching assembly 330 is mounted on the floating block 321, and mounting blind holes for the first elastic member 322 to be placed in are formed in the opposite surfaces of the support 311 and the floating block 321, so that the positioning function can be achieved and the structure of the flexible assembly is more compact. In this embodiment, the first elastic member 322 is a spring. It can be understood that, when the punching assembly 330 punches a hole, the floating block 321 is driven to move downwards, the first elastic part 322 can absorb energy when the punching assembly 330 punches a hole, and restore the position of the punching assembly 330 after the punching is completed, so that tolerance fluctuation of the radian of the product 110 can be absorbed, the tolerance flexibility compatibility of different radians is realized, the radian of the product is basically kept unchanged before and after punching, and thus the problem that the radian of the product is out of tolerance after punching due to the change of the curvature of the product is solved.

Preferably, in order to move the floating block 321 downward in a predetermined direction during the downward movement of the floating block 321, a plurality of guide bush assemblies including a bush 323 and a guide shaft 324 engaged with the bush 323 are provided between the holder 311 and the floating block 321, the bush 323 is mounted on the holder 311, and the guide shaft 324 is mounted on the floating block 321. In this embodiment, the floating block 321 moves in an inclined direction, rather than moving vertically, but those skilled in the art will appreciate that the up-and-down inclined movement of the floating block 321 will also cause the up-and-down position of the floating block 321 to change, and is not limited to moving vertically.

In addition, the floating block 321 is provided with a plurality of limit bolts 325 for adjusting the floating stroke of the floating block 321, and the limit bolts 325 pass through the floating block 321 and then are connected to the support 311. In use, the spacing bolt 325 adjusts the spacing between the float 321 and the support 311.

In this embodiment, the floating block 321 floats 0.3mm, and its working principle: first, the limit bolt 325 is adjusted to make the distance between the adjustment floating block 321 and the support 311 0.3mm, and each first elastic member 322 provides an elastic force. Secondly, the product 110 is placed into a punching die of the special punching machine, is positioned and clamped, and is clamped by the clamping block through the driving of the air cylinder. Thirdly, performing the first step; the driving source 336 drives the small slide block 332 to drive the material pressing plate 333 to press a product, and drives the punching punch 334 to punch a hole in the product 110; fourthly, the adjustment of the limit bolt 325 is carried out according to the radian of the product 110, the limit bolt 325 in the embodiment can adjust the range of the distance between the floating block 321 and the support 311 to be 0-6 mm, if the radian of the product 110 is a theoretical value, the product 110 is pressed and punched to move, the product 110 is contacted with the product 110 and continues to move, the product 110 and the whole group of punching assemblies 330 are pressed to move downwards, the product 110 is attached to the product 110 by the pressing block 333 and the lower module 335, and the gap between the limit bolt 325 is equal to 0.3mm at this time, and then the punching action is finished; if the radian of the product 110 is increased, pressing and punching the product, contacting the product 110, continuously moving, pressing the product 110 and the whole group of punching assemblies 330 to move downwards, until the pressing block 333 and the lower die block 335 are attached to the product 110, and at this time, the gap between the limiting bolts is larger than 0.3mm, and then finishing the punching action; if the radian of the product 110 is reduced, the pressing and punching movement is performed to contact the product 110, the movement is continued, the product 110 and the whole group of punching assemblies 330 are pressed to move downwards, the pressing block 333 and the lower die block 335 are attached to the product 110, and at this time, the gap between the limiting bolts is smaller than 0.3mm, and the punching action is completed.

If the punching die of the special punching machine is provided with six groups of punching die tolerance absorbing flexible structures 300, every two groups of punching dies can move simultaneously, and the product 110 is taken after all the punching dies are completely finished.

In addition, a guide rail sliding part 341 is arranged between the punching assembly 330 and the floating block 321, the guide rail sliding part 341 comprises a guide rail and a sliding block which are matched with each other, the guide rail is arranged on the floating block 321, and the sliding block is arranged on the punching assembly 330. The float 321 is fitted with a number of adjustment bolts 342 for securing the punch assembly 330. It can be understood that the large slider 331 slides through the guide rail slider 341, and after the position is adjusted, the large slider 331 is fixed by the adjusting bolt 342 on the floating block 321, so that different products can be punched.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A punching die tolerance absorbing compliant structure characterized by: comprises that

A support (311);

a punch assembly (330), the punch assembly (330) comprising a punch (334) for punching a product (110) and a drive source (336) for driving the punch (334) to move; and

flexible assembly (320), flexible assembly (320) set up support (311) with between the subassembly (330) punches a hole, flexible assembly (320) include first elastic component (322) of a plurality of, the subassembly (330) punches a hole through each first elastic component (322) are installed on support (311), flexible assembly (320) still include floating block (321), first elastic component (322) lower extreme with support (311) are connected, first elastic component (322) upper end with floating block (321) are connected, the subassembly (330) of punching a hole is installed on floating block (321), floating block (321) are installed and are used for adjusting a plurality of spacing bolt (325) of floating block (321) buoyancy lift stroke, spacing bolt (325) pass connect behind floating block (321) on support (311).

2. The punching die tolerance absorbing flexible structure of claim 1, wherein: a plurality of guide bushing kits are arranged between the support (311) and the floating block (321), each guide bushing kit comprises a bushing (323) and a guide shaft (324) matched with the bushing (323), the bushing (323) is installed on the support (311), and the guide shaft (324) is installed on the floating block (321).

3. The punching die tolerance absorbing flexible structure of claim 2, wherein: a guide rail sliding part (341) is arranged between the punching assembly (330) and the floating block (321), the guide rail sliding part (341) comprises a guide rail and a sliding block which are matched with each other, the guide rail is arranged on the floating block (321), and the sliding block is arranged on the punching assembly (330).

4. The punching die tolerance absorbing flexible structure of claim 3, wherein: the floating block (321) is provided with a plurality of adjusting bolts (342) used for fixing the punching assembly (330).

5. The punching die tolerance absorbing flexible structure according to any one of claims 1 to 4, wherein: the punching assembly (330) further comprises a large sliding block (331) connected with the floating block (321) and a pressing unit arranged on the large sliding block (331), the pressing unit comprises a lower die block (335) and a pressing plate (333) used for clamping a product (110), the driving source (336) is arranged on the large sliding block (331), and the driving end of the driving source (336) is connected with the pressing plate (333) and the punching punch (334) and drives the pressing plate (333) and the punching punch (334) to move towards the direction of the lower die block (335).

6. The punching die tolerance absorbing flexible structure of claim 5, wherein: the driving end of the driving source (336) is connected with a small sliding block (332), the material pressing plate (333) is installed on the small sliding block (332) through a plurality of second elastic pieces (337), and the punching punch (334) is installed on the small sliding block (332) and penetrates through the material pressing plate (333).

7. The punching die tolerance absorbing flexible structure of claim 6, wherein: the driving source (336) is an oil cylinder.

8. The punching die tolerance absorbing flexible structure according to any one of claims 1 to 4, wherein: the first elastic member (322) is a spring.