CN112756470A

CN112756470A - Blanking processing method and device

Info

Publication number: CN112756470A
Application number: CN202011585298.9A
Authority: CN
Inventors: 李求华; 何军; 苏喜
Original assignee: Zhuhai Jiate Precision Industry Co ltd
Current assignee: Zhuhai Jiate Precision Industry Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-05-07

Abstract

The invention provides a blanking processing method, which comprises the steps of blanking a first surface of a workpiece to be processed to form a plurality of punched holes; blanking the second surface of the workpiece to be processed to form a blanked product containing a corresponding punched hole; pushing the blanking product back to enable the blanking product to be clamped at the blanking cavity of the workpiece to be machined; and ejecting the blanking product out of the blanking cavity and blowing the blanking product off from the workpiece to be machined. The invention also provides a blanking processing device, wherein the first upper male die performs downward blanking on the workpiece to be processed to form a plurality of punched holes on the workpiece to be processed, the second lower male die performs upward blanking on the workpiece to be processed to form a blanked product on the workpiece to be processed, the second upper female die comprises a push-back module for pushing the blanked product back to the blanking cavity of the workpiece to be processed, the blanked product is ejected from the blanking cavity of the workpiece to be processed through the ejection module, and the blanked product is blown down to the product collecting region by the blowing module. The method has the characteristics of consistent burr direction, less burr amount and high flatness.

Description

Blanking processing method and device

Technical Field

The invention belongs to the technical field of stamping, and particularly relates to a blanking method and a blanking device.

Background

In the stamping industry, burrs are inevitably generated when materials are blanked and broken, and the application effect and even the processing process are influenced if the direction of the generated burrs interferes with the use purpose.

Referring to fig. 1 and 2, when a workpiece 100 to be processed is punched, a smooth corner collapse zone 101 appears on a portion of a punch 104 facing a material if a target process is punching, whereas a rough burr zone 102 appears if the target process is blanking. The burr region 102 brings inconvenience to the manufacturing process in real life, such as scratching of workers, scratching of products, and the like.

In the existing progressive die, punching and blanking of the whole set of die are uniformly arranged into an upper male die and a lower female die, and the blanking directions are consistent regardless of the punching or blanking. Therefore, when the workpiece 100 to be processed includes both punching and blanking processes, the phenomenon of inconsistent burr directions occurs at different positions on the same side of the workpiece, that is, burrs occur on the front and back sides of the workpiece 100 to be processed, and the produced workpiece has the problems of inconsistent burr directions, corner connecting cutters, more burrs and insufficient flatness.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a blanking processing method and a device, solves the problem that the blanking surfaces are all the same in the prior art, and overcomes the process defects that products produced by the prior method have inconsistent burr directions, corner connecting tool marks, more burrs, insufficient flatness and the like.

In order to achieve the above object, in a first aspect, the present invention provides a blanking processing method including the steps of:

s1: blanking a first surface of a workpiece to be processed to form a plurality of punched holes on the workpiece to be processed;

s2: blanking the second surface of the workpiece to be processed to form a blanked product containing a corresponding punched hole;

s3: pushing the blanking product back to enable the blanking product to be clamped at the blanking cavity of the workpiece to be machined;

s4: and ejecting the blanking product out of the blanking cavity and blowing the blanking product off the workpiece to be machined.

Further, placing the workpieces to be processed on a transmission device, wherein a plurality of stations are arranged in the transmission direction of the transmission device;

controlling a first upper male die in a first station to perform downlink blanking on the workpiece to be processed, forming a plurality of punched holes on the workpiece to be processed, and then controlling a transmission device to transmit the workpiece to be processed to a second station;

controlling a second lower male die in a second station to carry out upward blanking on the workpiece to be machined, and forming a blanking product on the workpiece to be machined, wherein the blanking product comprises a corresponding punched hole;

the pushing-back module pushes back a blanking product to a blanking cavity of the workpiece to be machined, and then the conveying device conveys the workpiece to be machined to a third station, wherein the pushing-back module is arranged in a second upper concave die of the second station;

and controlling an ejection module to eject the blanking product out of the blanking cavity of the workpiece to be machined, and blowing off the blanking product through a blowing module, wherein the ejection module is arranged at the third station.

Further, the pushing-back module pushes back the blanking product to the blanking cavity of the workpiece to be machined, wherein the distance between the overlapping part of the blanking product and the workpiece to be machined on the vertical section is n x t, wherein t is the material thickness of the workpiece to be machined, and n is a pushing-back coefficient.

Further, after the second lower male die is blanked, the blanked product is clamped at the second upper female die, and when the workpiece to be machined is clamped by the second upper female die and the second lower male die, the back-pushing module pushes the blanked product back to the blanking cavity of the workpiece to be machined.

Furthermore, before the second surface of the workpiece to be processed is punched, a plurality of pressure relief holes are punched in the workpiece to be processed, and the pressure relief holes and the outermost edge of the blanked product keep a punching distance.

Further, the first upper male die simultaneously forms a plurality of punched holes and a plurality of pressure relief holes in one-time downward blanking.

Furthermore, a pressure relief hole station is arranged between the first station and the second station, after punching in the first station is completed, a pressure relief hole is formed in the pressure relief hole station, and then the pressure relief hole is transmitted to the second station for blanking.

In a second aspect, the invention provides a blanking device applied to the blanking method, which comprises a transmission device, a first station, a second station and a third station, wherein the first station, the second station and the third station are sequentially arranged according to a transmission direction, and the transmission device is used for transmitting a workpiece to be processed to sequentially pass through the first station, the second station and the third station;

the first station comprises a first upper male die, and the first upper male die is used for blanking the workpiece to be processed in a descending manner and forming a plurality of punched holes on the workpiece to be processed;

the second station comprises a second lower male die and a second upper female die, the second lower male die is used for punching the workpiece to be machined upwards and forming a blanking product on the workpiece to be machined, the second upper female die comprises a push-back module, and the push-back module is used for pushing the blanking product back to a blanking cavity of the workpiece to be machined;

the third station comprises an ejection module and a blowing module, the ejection module is used for ejecting the blanking product out of the blanking cavity of the workpiece to be machined, and the blowing module is used for blowing the blanking product to a product collecting area.

Further, the first upper punch die comprises a punching male die and a pressure eliminating male die, the punching male die is used for blanking the workpiece to be processed downwards and forming a plurality of punched holes on the workpiece to be processed, and the pressure eliminating male die is used for blanking the workpiece to be processed downwards and forming a plurality of pressure eliminating holes on the workpiece to be processed.

The pressure-eliminating hole punching device comprises a first station, a second station and a pressure-eliminating hole punching station, wherein the pressure-eliminating hole punching station is arranged between the first station and the second station and comprises a pressure-eliminating hole punching die, and the pressure-eliminating hole punching die is used for punching a workpiece to be machined and forming a plurality of pressure-eliminating holes in the workpiece to be machined.

The invention has the beneficial effects that:

1. the invention provides a blanking processing method and a device, which are used for blanking and punching a workpiece to be processed from the direction of a first surface and blanking the workpiece to be processed from the direction of a second surface, so that the processing edges at the first surface of the workpiece to be processed are both corner collapse zones, and burrs are both at the second surface, thereby realizing the control requirement of consistent burr directions;

2. the blanking product after being blanked is subjected to push-back operation, so that the blanking product is clamped at the blanking cavity of the workpiece to be machined again, the blanking product is prevented from staying on a coil stock or falling into a die, the condition that the die is damaged or the product is damaged is avoided, the fixed position of the blanking product is effectively controlled, the blanking product is not easy to loosen and keeps a relative position with the coil stock, and the blanking product can be conveniently peeled off from the workpiece to be machined subsequently;

3. in order to ensure the reliability of the push-back operation, the flatness and burr quantity of the blanked product are required to be ensured, the higher the flatness of the blanked product is, the less the burr quantity is, and the better the push-back operation effect is, therefore, in order to reduce the condition that a workpiece to be processed is interfered by stress in the blanking and blanking process, a plurality of pressure relief holes are punched in the position which is separated from the outermost edge of the blanked product by a blanking distance in advance, when the blanked product is blanked, the stress can be effectively released, the blanked product is ensured to be uniformly stressed, the burr quantity is less, and in the blanking process, the whole process of the blanked product is abutted against the push-back module, and the flatness.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic diagram of the result of blanking a work piece to be machined by a punch of a prior art.

Fig. 2 is a schematic view of the result of a part to be machined after blanking by a punch pin in the prior art.

Fig. 3 is a schematic structural flow diagram of a blanking method and a blanking device provided by the present invention.

Fig. 4 is a schematic structural diagram of a second station in the blanking method and apparatus provided by the present invention.

Fig. 5 is a schematic structural view of a relief hole punched in a workpiece to be processed in the blanking method and apparatus according to the present invention.

Fig. 6 is a schematic structural diagram of a blanking hole in a workpiece to be processed in the blanking method and device provided by the invention after blanking.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, 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 should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1:

referring to fig. 3 and 4, the present embodiment provides a blanking processing method including the steps of:

s1: blanking a first surface of a workpiece to be processed 100, and forming a plurality of punched holes 201 on the workpiece to be processed 100;

s2: blanking a second side of the workpiece 100 to form a blanked product 202 comprising corresponding punched holes 201;

s3: pushing the blanking product 202 back to enable the blanking product 202 to be clamped at the blanking cavity 203 of the workpiece 100 to be machined;

s4: the blanked product 202 is ejected out of the blanking cavity 203 and blown off the workpiece 100 to be processed.

Note that, punching is performed at a first surface of the workpiece 100 to be processed, and this punching forms a plurality of punched holes 201 on the workpiece 100 to be processed, so that a smooth corner-collapsing strip 101 is formed at a processing edge at this first surface; and then, blanking the second surface, wherein the blanking is blanking, the punched hole 201 in the first step is included in a blanked product, and then burrs are formed on the processing edge of the second surface of the back surface, and the first surface of the workpiece 100 to be processed is effectively controlled to be smooth and free of burrs through two opposite blanking processes.

After the blanking product 202 is formed on the workpiece 100 to be processed, because the blanking product 202 cannot fall on the die in addition to the coil stock, the blanking product 202 needs to be pushed back, i.e. the blanking product 202 is separated from the die, and secondly, the position of the blanking product 202 is controlled, and the blanking product 202 is clamped in the blanking cavity 203 of the workpiece 100 to be processed again, so that each blanking product 202 can still keep a relative position which is still kept with the coil stock after being blanked, and the blanking product 202 is not easy to loosen and is convenient to fall off subsequently; finally, the blanking product 202 is ejected out of the blanking cavity 203 in the subsequent working procedures, and the blanking product 202 is blown to a product collecting area, so that the whole blanking and forming operation is completed.

Referring to fig. 3 and 4, as an embodiment, the four steps are embodied as follows:

firstly, placing a workpiece 100 to be processed on a transmission device, wherein a plurality of stations are arranged in the transmission direction of the transmission device, and the transmission device drives the workpiece 100 to be processed to sequentially pass through the stations;

controlling a first upper male die 311 in a first station 310 to punch the workpiece 100 to be processed in a downward direction, forming a plurality of punched holes 201 on the workpiece 100 to be processed, and then controlling a transmission device to transmit the workpiece 100 to be processed to a second station 320;

controlling a second lower male die 321 in a second station 320 to perform upward blanking on the workpiece 100 to be processed, and forming a blanked product 202 on the workpiece 100 to be processed, wherein the blanked product 202 comprises corresponding punched holes 201;

the pushing-back module 323 pushes back the blanking product 202 to the blanking cavity 203 of the workpiece 100 to be processed, and then the transmission device transmits the workpiece 100 to be processed to the third station 330, wherein the pushing-back module 323 is arranged in the second upper concave die 322 of the second station 320;

the conveying device continuously conveys the falling-particle product 202 clamped on the workpiece 100 to be processed out of the die of the second station 320, controls the material ejecting module to eject the falling-particle product 202 out of the blanking cavity 203 of the workpiece 100 to be processed, and blows the falling-particle product 202 off through the blowing module, wherein the material ejecting module is arranged at the third station 330.

Note that, in this embodiment, the first surface of the workpiece 100 to be processed is the surface of the workpiece 100 to be processed facing upward, and naturally, the second surface of the workpiece 100 to be processed is the surface of the workpiece 100 to be processed facing downward, and of course, the first surface and the second surface may be turned, that is, the first surface is the surface facing downward, and the second surface is the surface facing upward. Therefore, the upward surface of the workpiece 100 is smooth, and the downward surface is only the surface with burrs. The punching 201 is completed at the first station 310, the blanking and the pushing back are completed at the second station 320, the ejecting and the blowing are completed at the third station 330, and the whole processing process is completed. In addition, for different products, other processes can be flexibly added between the three stations or before and after the three stations, and the three stations are also included in the protection scope of the invention.

As an embodiment, the pushing back module 323 pushes back the blanking product 202 to the blanking cavity 203 of the to-be-processed workpiece 100, where a distance between an overlapping portion of the blanking product 202 and the to-be-processed workpiece 100 on a vertical cross section is n × t, where t is a material thickness of the to-be-processed workpiece 100, n is a pushing back coefficient, n is less than 1, a value of n is determined according to the material thickness of the to-be-processed workpiece 100, if the to-be-processed workpiece 100 is a stainless steel material with a thickness less than 0.1mm, a value of the pushing back coefficient n is greater than 2/3, and if the to-be-processed workpiece 100 is an aluminum plate with a thickness of 1mm, the value of the pushing back coefficient n is 1/3. The push-back module 323 adopts a structural form of a spring top block, the shape of the spring top block is adapted to the blanked product 202, and by adjusting the pre-tightening force of the spring, the blanked product 202 is pressed back by n x t again when the push-back operation is implemented, that is, the distance between the blanked product 202 and the part to be processed 100, which is overlapped with the blanked product, is n x t when viewed from a vertical section, so that the blanked product 202 is ensured not to be loosened, and the subsequent convenient peeling is also ensured.

Additionally, the height of the second upper concave die 322 recessed from the second station 320 by the push-back module 323 is t-n × t, where t is the thickness of the material to be processed by the workpiece 100.

In the embodiment, in order to ensure the flatness of the blanked product 202, after the second lower male die 321 is blanked, that is, after the blanking depth reaches t-n × t, the blanked product 202 is clamped at the second upper female die 322, and the push-back module 323 and the second lower male die 321 in the second upper female die 322 clamp the workpiece to be processed 100 and continue to punch upwards to the upper top point, and then when the second station 320 is reset and separated, the push-back module 323 pushes the blanked product 202 back to the blanking cavity 203 of the workpiece to be processed 100. From blanking to pushing back, the relative position of the workpiece to be processed 100 and the blanked product 202 is unchanged from the horizontal conveying direction, and in the whole stress process of the blanked product 202, the lower side is provided with a second lower male die 321, the upper side is provided with a spring ejecting block of the pushing back module 323, and the second lower male die 321 and the spring ejecting block clamp the blanked product 202 from the upper side and the lower side respectively, so that the blanked product 202 cannot be bent, and the flatness of the blanked product 202 is ensured.

Referring to fig. 5 and 6, in this embodiment, in order to reduce stress in the blanking process of the blanked product 202, and further achieve the purposes of uniform stress and burr reduction, before the second surface of the workpiece 100 is blanked, a plurality of pressure relief holes 204 are blanked on the workpiece 100, a blanking distance is maintained between the pressure relief holes 204 and the outermost edge of the blanked product 202, the blanking distance is greater than zero, the pressure relief holes 204 are not in contact with or overlapped with the blanked product 202, the pressure relief holes 204 form a stress absorption area, when the workpiece 100 is blanked and blanked, the generated stress is released at the pressure relief holes 204, the pressure relief holes 204 generate deformation from inside to outside, and the effect of eliminating uneven stress on the blanking outer edge of the blanked product 202 is achieved by pressing the pressure relief holes 204 to deform, so as to reduce burrs.

According to the order of the blanking process of the pressure relief hole 204, the following two methods can be used:

preferably, the first upper male die 311 forms a plurality of punched holes 201 and a plurality of relief holes 204 simultaneously in one down blanking. Namely, the manufacturing process of the punched hole 201 and the pressure relief hole 204 is completed through one station.

As another preferable mode, a pressure relief hole station is further provided between the first station 310 and the second station 320, after the punching 201 in the first station 310 is completed, the pressure relief hole 204 is formed in the pressure relief hole station, and then the punched hole is transferred to the second station 320 for blanking.

Example 2:

referring to fig. 3 and 4, the present embodiment 2 provides a blanking device applied to the blanking method in embodiment 1, including a transmission device, a first station 310, a second station 320, and a third station 330, where the first station 310, the second station 320, and the third station 330 are sequentially arranged according to a transmission direction, and the transmission device is configured to transmit the workpiece 100 to be processed to sequentially pass through the first station 310, the second station 320, and the third station 330;

the first station 310 comprises a first upper male die 311, wherein the first upper male die 311 is used for blanking the workpiece 100 to be processed in a downward direction and forming a plurality of punched holes 201 on the workpiece 100 to be processed; it should be noted that the first station may be only one station, or may be a module group with the same function, that is, the first stations 310 with the same function may sequentially pass through;

the second station 320 comprises a second lower male die 321 and a second upper female die 322, the second lower male die 321 is used for punching the workpiece 100 to be processed in an upward direction and forming the blanked product 202 on the workpiece 100 to be processed, the second upper female die 322 comprises a push-back module 323, and the push-back module 323 is used for pushing the blanked product 202 back to the blanking cavity 203 of the workpiece 100 to be processed; wherein the push-back module 323 adopts the structural form of a spring ejector block;

the third station 330 includes a material ejecting module and a blowing module, the material ejecting module is used for ejecting the blanked product 202 from the blanking cavity 203 of the workpiece 100 to be processed, the material ejecting module performs synchronous motion along with the die assembly of the upper die and the lower die of the first station 310 and the second station 320, the cover plate located above presses the rest of the coil materials of the workpiece 100 to be processed during die assembly, the material ejecting module located below ejects the blanked product 202, and the blanked product 202 is blown to the product collecting area through the preset blowing module, so that the whole blanking forming operation is completed.

In order to eliminate the stress of blanking goods 202 in blanking process, and then reach the atress even, reduce the purpose of burr, before treating the second face of machined part 100 and go on the blanking, earlier on treating machined part 100 and cut out a plurality of pressure relief hole 204, according to the order of pressure relief hole 204 blanking process, can divide into following two kinds of implementation:

as a preferable mode, the first upper male die 311 includes a punching 201 male die and a pressure relief male die, the punching 201 male die is used for performing downward punching on the workpiece 100 to be processed and forming a plurality of punching holes 201 on the workpiece 100 to be processed, and the pressure relief male die is used for performing downward punching on the workpiece 100 to be processed and forming a plurality of pressure relief holes 204 on the workpiece 100 to be processed. Namely, the manufacturing process of the punched hole 201 and the pressure relief hole 204 is completed through one station.

As another preferable mode, the punching machine further comprises a pressure-relief hole station, the pressure-relief hole station is arranged between the first station 310 and the second station 320, and the pressure-relief hole station comprises a pressure-relief hole punch, and the pressure-relief hole punch is used for punching the workpiece 100 to be processed and forming a plurality of pressure-relief holes 204 in the workpiece 100 to be processed.

Compared with the prior art, the invention provides a blanking processing method and a device, wherein the blanking and punching 201 are carried out on the workpiece to be processed 100 from the direction of the first surface, and the blanking is carried out on the workpiece to be processed 100 from the direction of the second surface, so that the processing edges at the first surface of the workpiece to be processed 100 are both corner collapse zones 101, and burrs are both at the second surface, and the control requirement of consistent burr directions is realized;

according to the blanking device, the blanking product 202 after being blanked is pushed back, so that the blanking product 202 is clamped at the blanking cavity 203 of the workpiece 100 to be processed again, the blanking product 202 is prevented from staying on a coil stock or falling in a die, the condition that the die is damaged or the product is damaged is avoided, the effective control of the fixed position of the blanking product 202 is realized, the relative position of the blanking product 202 and the coil stock is not easy to loosen, and the blanking product 202 can be conveniently peeled off from the workpiece 100 to be processed;

in order to ensure the reliability of the push-back operation, the flatness and burr quantity of the blanked product 202 are required to be ensured, the higher the flatness of the blanked product 202 is, the less the burr quantity is, and the better the push-back operation effect is, therefore, in order to reduce the condition that the workpiece 100 to be processed is interfered by stress in the blanking and blanking process, a plurality of pressure relief holes 204 are punched in advance at a position which is separated from the outermost edge of the blanked product 202 by a blanking distance, when the blanked product is blanked, the stress can be effectively released, the blanked product is ensured to be uniformly stressed, the burr quantity is small, and in the blanking process, the whole process of the blanked product is abutted against the push-back module 323, and the flatness.

Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only the preferred embodiments of the invention have been described above, and the present invention is not limited to the above-described embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A blanking processing method is characterized by comprising the following steps:

2. The blanking process of claim 1,

placing a workpiece to be processed on a transmission device, wherein a plurality of stations are arranged in the transmission direction of the transmission device;

3. The blanking processing method of claim 2, wherein the push-back module pushes back the blanked product to the blanking cavity of the workpiece, wherein the distance between the overlapped part of the blanked product and the workpiece in the vertical cross section is n x t, wherein t is the material thickness of the workpiece, and n is the push-back coefficient.

4. The blanking processing method of claim 3, wherein after the second lower punch performs blanking, the blanked product is clamped at the second upper female die, and when the workpiece to be processed is clamped by the second upper female die and the second lower punch, the push-back module pushes back the blanked product to the blanking cavity of the workpiece to be processed.

5. The blanking method of any one of claims 1 to 4, wherein, before the blanking of the second surface of the member to be processed, a plurality of relief holes are punched in the member to be processed, the relief holes being spaced apart from an outermost edge of the blanked product.

6. The blanking process of claim 5, wherein the first upper punch forms a plurality of punched holes and a plurality of relief holes simultaneously in one down blanking.

7. The blanking process of claim 5, wherein a pressure relief hole station is further provided between the first station and the second station, and after the punching in the first station is completed, a pressure relief hole is formed in the pressure relief hole station and then transferred to the second station for blanking.

8. A blanking processing apparatus applied to the blanking processing method according to any one of claims 1 to 7, comprising a conveying device, a first station, a second station, and a third station, the first station, the second station, and the third station being arranged in order in a conveying direction, the conveying device being configured to convey a member to be processed through the first station, the second station, and the third station in order;

9. The blanking processing device of claim 8, wherein the first upper punch includes a punching punch for blanking the member to be processed downward and forming a plurality of punched holes in the member to be processed, and a blank hole punch for blanking the member to be processed downward and forming a plurality of blank holes in the member to be processed.

10. The blanking processing device of claim 8, further comprising a pressure relief hole station provided between the first station and the second station, the pressure relief hole station including a pressure relief hole punch for blanking the member to be processed and forming a plurality of pressure relief holes in the member to be processed.