CN111745038A

CN111745038A - Synchronous punching method for different surfaces of workpiece

Info

Publication number: CN111745038A
Application number: CN202010555421.6A
Authority: CN
Inventors: 黄伟岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-10-09

Abstract

The invention discloses a synchronous punching method for different surfaces of a workpiece, which is characterized by comprising the following steps of: step S1, opening a top die and a side die, and placing a workpiece needing to be punched on the cavity surface of the bottom die; step S2, the top die and the side die are combined, the stamping cylinder pushes the push plate to move upwards, the vertical slide block moves upwards in the vertical slide way of the bottom die, the upper punch punches the upper part of the workpiece, the bent slide block slides towards the side die along the arc-shaped slide way, and the side punch punches the side part of the workpiece; step S3, the top of the ejector rod props the bent slide block in the bottom die, the stamping cylinder stops moving upwards, and the die maintains pressure; step S4, the stamping cylinder is reset, the upper punch leaves the upper punching hole on the top die, and the side punch leaves the side punching hole on the side die; and step S5, opening the top die and the side die, and unloading the workpiece. The invention provides a synchronous punching method for different surfaces of a workpiece, which can realize one-time synchronous punching processing on two different surfaces of the workpiece, which are not in one plane, and improve punching efficiency.

Description

Synchronous punching method for different surfaces of workpiece

Technical Field

The invention relates to the field of punching, in particular to a method for synchronously punching different surfaces of a workpiece.

Background

Die punching is a common means of cold working a workpiece. The existing die punching is generally directed to single-side punching processing on a flat plate piece. For example, the chinese patent publication No. CN108080493A discloses "a punching die method", which includes the following steps: positioning a to-be-stamped part by using a positioning die; stamping the to-be-stamped part by adopting a first stamping part so as to form a punched hole with a flanging on the to-be-stamped part; and stamping the free end of the flanging by adopting a second stamping part, so that the free end of the flanging is bent outwards from the punched hole.

In order to improve the processing efficiency, people design a multi-surface punching die, and as the Chinese patent of the publication No. CN105689512A, the invention discloses a double-surface punching-based sheet metal punching method, which comprises an upper punching head driven by an upper punching driving device, a clamping device driven by a pushing cylinder and a lower punching head driven by a lower punching driving device, wherein the upper punching driving device, the pushing cylinder and the lower punching driving device are respectively connected with a controller; the punching process controlled by the controller comprises the following steps: the first step is as follows: the workpiece is arranged on the clamping device, and the pushing cylinder is started to clamp the workpiece; the second step is that: controlling an upper punching driving device to drive an upper punching head to punch downwards, controlling a lower punching driving device to drive a lower punching head to punch upwards, and simultaneously carrying out the two operations; the third step: stopping driving of the upper punching driving device and driving of the lower punching driving device and enabling the upper punching driving device and the lower punching driving device to respectively drive the upper punching head and the lower punching head to retreat; the fourth step: and controlling the pushing cylinder to retreat, taking down the processed workpiece and finishing punching. However, the above-described punching die can perform double-sided punching only for axially arranged parts, and cannot perform punching processing for those workpieces.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a method for synchronously punching different surfaces of a workpiece, aiming at the current situation of the prior art, which can realize one-time synchronous punching processing of two different surfaces of the workpiece, which are not in one plane, and improve punching efficiency.

The technical scheme adopted by the invention for solving the technical problems is as follows: the method for synchronously punching different surfaces of the workpiece is characterized by comprising the following steps of:

step S1, opening a top die and a side die, and placing a workpiece needing to be punched on the cavity surface of the bottom die;

step S2, the top die and the side die are assembled, the workpiece is positioned and pressed in the die, the stamping cylinder pushes the push plate to move upwards, the push rod on the push plate drives the vertical slide block to move upwards in the vertical slide way of the bottom die, the upper punch punches the upper part of the workpiece, meanwhile, the transmission column on the bent slide block moves upwards along the inclined slide way of the vertical slide block in an inclined way, the vertical slide block drives the bent slide block to slide along the arc-shaped slide way towards the side die, and the side punch punches the side part of the workpiece;

step S3, the top of the ejector rod props the bent slide block in the bottom die, the stamping cylinder stops moving upwards, and the die maintains pressure;

step S4, the stamping cylinder is reset, the stamping cylinder drives the push plate to move downwards, the ejector rod and the vertical slide block synchronously move downwards, the upper punch head leaves the upper punched hole on the top die, the transmission column moves downwards in the inclined slide way in an inclined mode, the vertical slide block drives the bent slide block to move in the opposite direction, and the side punch head leaves the side punched hole on the side die;

and step S5, opening the top die and the side die, and unloading the punched workpiece.

In step S3, in the upward movement process of the push plate, the rack on one of the push rods moves upward to drive the driving gear to rotate, the driving gear drives the cam to rotate through the driving gear, and when the vertical slider and the curved slider just move to the highest position, the farthest position from the rotation center on the cam abuts against the lower end of the push rod, so as to maintain pressure of the workpiece.

In step S4, in the downward movement process of the push plate, the rack on one of the push rods drives the cam to rotate in the opposite direction, the farthest position on the cam is away from the bottom of the push rod, and the closest position on the cam to the rotation center is close to the bottom of the push rod and finally contacts the bottom of the push rod.

And a step S3, in which, when the push plate pushes the vertical slider to move upward, the other end of the curved rod pushes the substrate at the bottom of the push rod to move upward, and when the vertical slider and the curved slider just move to the highest position, the upper end of the push rod abuts against the lower end of the curved slider to keep the push plate stationary, and the curved rod uses the push plate as an upper contact point fulcrum, one end of the curved rod can jack up the substrate, so as to avoid the substrate moving downward, and maintain pressure of the workpiece.

In step S4, during the downward movement of the pushing plate, the curved bar rotates in the opposite direction, the substrate moves downward synchronously, and finally the substrate contacts with the pad on the pushing plate.

In step S1, the electromagnet in the bottom mold is powered on, and the workpiece is attracted to the bottom mold cavity.

In step S5, the electromagnet is powered off, the bottom die loses its adsorption on the workpiece, and the workpiece is taken out.

Compared with the prior art, the invention has the advantages that: the invention utilizes the bottom die, the top die and the side die to form a die cavity of the workpiece, simultaneously, the top die and the side die move in the die opening and closing process, thereby facilitating the loading and unloading of the workpiece, in addition, the vertical slide way and the arc slide way are arranged in the bottom die, the vertical slide block is driven by the push plate to move in the bottom die, when the vertical slide block moves upwards, the transmission column on the curved slide block moves upwards in the inclined slide way of the vertical slide block, so that the vertical slide block pushes the curved slide block to slide in the arc-shaped slide way towards the side punching direction, in the process of pushing the push plate upwards once, the synchronous punching processing of two different surfaces which are not in one plane on the workpiece is realized, and in the process that the vertical sliding block is driven by the push plate to move downwards, the transmission column moves downwards in the inclined slide way in an inclined mode, the bent sliding block is driven to move in the opposite direction, the workpiece can be unloaded, and the punching efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of a synchronous punching device related to different surfaces of a workpiece according to an embodiment of the present invention;

FIG. 2 is a schematic view of the punching apparatus of FIG. 1 in another punching step;

FIG. 3 is a schematic structural view of the bottom mold of FIG. 1;

FIG. 4 is a schematic structural view of the curved slider of FIG. 1;

FIG. 5 is a schematic structural view of the vertical slider in FIG. 1;

FIG. 6 is a schematic structural diagram of a device for synchronously punching different surfaces of a workpiece according to an embodiment of the present invention;

fig. 7 is a schematic view of the structure of fig. 6 at another punching step.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

First, the present invention will be briefly described with respect to a device for synchronously punching different surfaces of a workpiece.

As shown in fig. 1 to 6, the device for synchronously punching different surfaces of a workpiece according to the present invention includes a bottom die 1, a top die 2, a side die 3, a vertical slide block 4, a curved slide block 5, a punching cylinder, a push plate 6, a push rod 61 and a push rod mechanism.

Wherein, a cavity 10 matched with the external shape of the workpiece is formed inside the bottom die 1, the top die 2 and the side die 3 when the dies are closed, an upper punching hole 21 is arranged in the cavity of the top die 2, a side punching hole 31 is arranged in the cavity of the side die 3, a vertical slideway 11 which is vertically arranged is arranged in the bottom die 1, an arc slideway 12 which is opposite to the side punching hole 31 is arranged in the bottom die 1, a vertical slide block 4 is arranged in the vertical slide way 11 in a sliding way, the top surface of the vertical slide block 4 is provided with the same shape as the corresponding position of the molded surface of the bottom die 1, the vertical slide block 4 is provided with an inclined slide way 41, a curved slide block 5 is arranged in the arc-shaped slide way 12 in a sliding way, a transmission column 52 limited in the inclined slide way 41 is arranged on the curved slide block 5, an upper punch 42 is arranged on the top of the vertical slide block 4, a side punch 51 is arranged on the side wall of the bending slide block 5 opposite to the side punching hole 31, and the position of the upper punch of the bending slide block 5 is formed with the same shape as the corresponding position of the molded surface of the bottom die 1.

In addition, a push plate 6 is arranged below the bottom die 1, a stamping cylinder is arranged below the push plate 6, a push rod 61 is arranged on the push plate 6, and the push rod 61 is connected with the vertical slide block 4. Meanwhile, a sliding hole 14 communicated with the bent sliding block 5 is formed in the vertical sliding block 4, a push rod 7 is arranged in the sliding hole 14 in a sliding mode, the top of the push rod 7 is in a shape matched with the bottom of the bent sliding block 5 in the direction of the bottom, and the bottom of the push rod 7 is in contact with the outer wall of the cam 84.

The ejector rod mechanism is provided with a plurality of structures, the first structure is a cam structure, namely, a fixed plate 13 is fixedly connected to the bottom of the bottom die 1, the push rod 61 penetrates through the fixed plate 13 and then is connected with the vertical slide block 4, a rack 81 is arranged on the push rod 61 along the rod length direction, a driving gear 82 meshed with the rack 81 and a transmission gear 83 meshed with the driving gear 82 are arranged on the fixed plate 13, and a cam 84 is arranged on the rotating shaft of the transmission gear 83. The second structure is a bent rod structure, i.e. a cushion block 91 is arranged on the push plate 6, a base plate 93 is arranged at the bottom of the ejector rod 7, a bent rod 92 is arranged above the push plate 6, one end of the bent rod 92 is hinged on the bottom die 1, and the other end of the bent rod 92 is positioned below the base plate 93.

The invention discloses a synchronous punching method for different surfaces of a workpiece, which comprises the following steps:

step S1, opening the top die 2 and the side die 3, and placing a workpiece needing to be punched on the cavity surface of the bottom die 1;

step S2, the top die 2 and the side die 3 are matched, a workpiece is positioned and pressed in the die, the stamping cylinder pushes the push plate 6 to move upwards, the push rod 61 on the push plate 6 drives the vertical slide block 4 to move upwards in the vertical slide way 11 of the bottom die 1, the upper punch 42 punches a hole in the upper part of the workpiece, meanwhile, the transmission column 52 on the bent slide block 5 moves upwards along the inclined slide way 41 of the vertical slide block 4 in an inclined mode, the vertical slide block 4 drives the bent slide block 5 to slide towards the side die 3 along the arc-shaped slide way 12, and the side punch 51 punches a hole in the side part of the workpiece;

step S3, the top of the ejector rod 7 props the bent slide block 5 in the bottom die 1, the stamping cylinder stops moving upwards, and the die maintains pressure;

step S4, the stamping cylinder is reset, the stamping cylinder drives the push plate 6 to move downwards, the ejector rod 7 and the vertical slide block 4 synchronously move downwards, the upper punch 42 leaves the upper punched hole 21 on the top die 2, the transmission column 52 moves downwards in the inclined slideway 41 in an inclined mode, the vertical slide block 4 drives the bent slide block 5 to move in the opposite direction, and the side punch 51 leaves the side punched hole 31 on the side die 3;

and step S5, opening the top die 2 and the side die 3, and unloading the punched workpiece.

When the work piece punching press was accomplished, in order to withstand curved slider 5 bottom, avoid curved slider 5 to appear gliding immediately after the punching press is accomplished, provide the dwell time for the work piece punching press. In the step S3, in the upward movement process of the push plate 6, the rack 81 on one of the push rods moves upward to drive the driving gear 82 to rotate, the driving gear 82 drives the cam 84 to rotate through the transmission gear 83, and when the vertical slider 4 and the curved slider 5 just move to the highest position, the farthest position on the cam 84 from the rotation center abuts against the lower end of the push rod 7, so as to realize pressure maintaining on the workpiece; meanwhile, in the step S4, during the downward movement of the push plate 6, the rack 822 on one of the push rods drives the cam 84 to rotate reversely, the cam 84 is farthest away from the bottom of the push rod 7, and the cam 84 is closest to the rotation center and approaches the bottom of the push rod 7 and finally contacts.

Further, in the step S3, when the push plate 6 pushes the vertical slider 4 to move upward, the other end of the curved bar 92 pushes the substrate 93 at the bottom of the push rod 7 to move upward, when the vertical slider 4 and the curved slider 5 just move to the highest position, the upper end of the push rod 7 abuts against the lower end of the curved slider 5, so as to keep the push plate 6 stationary, the curved bar 92 uses the push plate 6 as an upper contact point fulcrum, and one end of the curved bar 92 can push up the substrate 93, so as to prevent the substrate 93 from moving downward, thereby realizing pressure maintaining on the workpiece; meanwhile, in the above step S4, during the downward movement of the push plate 6, the curved lever 92 rotates reversely, the substrate 93 descends synchronously, and finally the substrate 93 contacts with the pad 91 on the push plate 6.

In addition, since the mold used in the present invention is a three-part assembly, in order to prevent the workpiece from slipping off during loading, in step S1, the electromagnet in the bottom mold 1 is energized, and the workpiece is attracted to the cavity of the bottom mold 1. Meanwhile, in the step S5, the electromagnet is de-energized, and the bottom die 1 loses the adsorption effect on the workpiece, so that the workpiece can be taken out.

In summary, the invention utilizes the bottom die 1, the top die 2 and the side die 3 to form a cavity of a workpiece, meanwhile, in the processes of die opening and die closing, the top die 2 and the side die 3 move to facilitate loading and unloading of the workpiece, in addition, the vertical slide rail 11 and the arc slide rail 12 are arranged in the bottom die 1, the push plate 6 is utilized to drive the vertical slide block 4 to move in the bottom die 1, the transmission column 52 on the curved slide block 5 moves obliquely upwards in the oblique slide rail 41 of the vertical slide block 4 while the vertical slide block 4 moves upwards, so that the vertical slide block 4 pushes the curved slide block 5 to slide towards the side punching direction in the arc slide rail 12, in the process of one-time upwards pushing of the push plate 6, the one-time synchronous punching processing of two different surfaces of the workpiece which are not in one plane is realized, and in the process of driving the vertical slide block 4 to move downwards by the transmission column 52 in the oblique slide rail 41 to drive the curved slide block 5 to move in the opposite, the workpiece can be unloaded, and the punching efficiency is improved.

Claims

1. The method for synchronously punching different surfaces of the workpiece is characterized by comprising the following steps of:

step S1, opening the top die (2) and the side die (3), and placing a workpiece needing to be punched on the cavity surface of the bottom die (1);

step S2, the top die (2) and the side die (3) are assembled, a workpiece is positioned and pressed in the die, the stamping cylinder pushes the push plate (6) to move upwards, a push rod (61) on the push plate (6) drives the vertical slide block (4) to move upwards in the vertical slide way (11) of the bottom die (1), the upper punch head (42) punches a hole on the upper part of the workpiece, meanwhile, a transmission column (52) on the bent slide block (5) moves upwards along the inclined slide way (41) of the vertical slide block (4), the vertical slide block (4) drives the bent slide block (5) to slide towards the side die (3) along the arc slide way (12), and the side punch head (31) punches a hole on the side part of the workpiece;

step S3, the top of the ejector rod (7) props the bent slide block (5) in the bottom die (1), the stamping cylinder stops moving upwards, and the die maintains pressure;

s4, the stamping cylinder is reset, the stamping cylinder drives the push plate (6) to move downwards, the ejector rod (7) and the vertical sliding block (4) synchronously move downwards, the upper punch (42) leaves the upper punched hole on the top die (2), the transmission column (52) moves downwards in the inclined slide way (41) in an inclined mode, the vertical sliding block (4) drives the bent sliding block (5) to move in the opposite direction, and the side punch (51) leaves the side punched hole (31) on the side die (3);

and step S5, opening the top die (2) and the side die (3), and unloading the punched workpiece.

2. The method for synchronously punching different surfaces of a workpiece according to claim 1, characterized in that: in the step S3, in the upward movement process of the push plate (6), the rack (81) on one push rod moves upward to drive the driving gear (82) to rotate, the driving gear (82) drives the cam (84) to rotate through the transmission gear (83), when the vertical slide block (4) and the bent slide block (5) just move to the highest position, the farthest position on the cam (84) from the rotation center is abutted against the lower end of the ejector rod (7), and pressure maintaining is carried out on the workpiece.

3. The method for synchronously punching different surfaces of a workpiece according to claim 2, characterized in that: in the step S4, in the process that the push plate (6) moves downwards, the rack (81) on one push rod drives the cam (84) to rotate reversely, the farthest position on the cam (84) is away from the bottom position of the push rod (7), and the closest position on the cam (84) to the rotation center is close to the bottom of the push rod (7) and finally contacts.

4. The method for synchronously punching different surfaces of a workpiece according to claim 1, characterized in that: in the step S3, in the process that the push plate (6) pushes the vertical slider (4) to move upwards, the other end of the bent rod (92) pushes the substrate at the bottom of the ejector rod (7) to move upwards, when the vertical slider (4) and the bent slider (5) just move to the highest position, the upper end of the ejector rod (7) abuts against the lower end of the bent slider (5), the push plate (6) is kept still, the bent rod (92) takes the push plate (6) as an upper contact point fulcrum, one end of the bent rod (92) can jack up the substrate (93), the substrate (93) is prevented from moving downwards, and pressure maintaining is performed on the workpiece.

5. The method for synchronously punching different surfaces of a workpiece according to claim 4, characterized in that: in the step S4, during the downward movement of the push plate (6), the curved bar (92) rotates reversely, the substrate (93) moves downward synchronously, and finally the substrate (93) contacts with the pad on the push plate (6).

6. The method for synchronously punching different surfaces of a workpiece according to claim 1, characterized in that: in the step S1, the electromagnet in the bottom die (1) is energized, and the workpiece is attracted to the cavity of the bottom die (1).

7. The method for synchronously punching different surfaces of a workpiece according to claim 6, characterized in that: in the step S5, the electromagnet is de-energized, the bottom die (1) loses the adsorption effect on the workpiece, and the workpiece is taken out.