A punching device for punching processing

Abstract

The present invention relates to the technical field of stamping devices, and in particular to a stamping device for stamping processing, comprising a machine base, a punch, a die, a pressure relief mechanism and a plurality of pressure-absorbing balls. The punch and the die are arranged in sequence on the machine base, and the punch can move toward the die and stamp a sheet. A forming negative angle is arranged on the punch, an electromagnet is arranged in the punch, and a plurality of pressure-absorbing balls are arranged in the die, and the pressure-absorbing balls include a sphere and a spherical shell wrapped outside the sphere. A stamping device for stamping processing of the present invention is provided with a machine base, a punch, a die, a pressure relief mechanism and a plurality of pressure-absorbing balls. As the punch moves, the electromagnet will absorb the spherical shell of the pressure-absorbing ball, so that the plurality of pressure-absorbing balls gather at a position on the sheet corresponding to the forming negative angle of the punch, and the pressure-absorbing balls and liquid pressure are used to act together at the forming negative angle to assist in forming the position on the sheet that needs to process the local negative angle, thereby improving the forming effect of the sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping devices, and in particular to a stamping device for stamping processing. Background Art

[0002] Liquid-filled drawing is a new flexible stamping process. During processing, the sheet is placed above a die filled with liquid. By controlling the movement of the punch toward the die, the sheet is pressed down and the liquid in the die is squeezed indirectly. When the liquid pressure reaches a certain value, the rate of liquid overflow is controlled. Due to the effect of reverse hydraulic pressure, the sheet can be pressed against the punch. The pressure is maintained until the workpiece is processed. The workpiece can be processed by removing the punch.

[0003] However, when it is necessary to process a workpiece with a local negative angle feature (i.e., there is a depression on the workpiece surface), the current common production method is to prepare an additional set of molds and fixtures, and then stamp the local negative angle feature after other features are formed. For example, Chinese patent application CN113714375A discloses a follow-up forming method for complex thin-walled parts, which first stamps the sheet to form a semi-formed part, then puts it into a liquid-filled chamber, and uses liquid-filled forming to perform high-pressure shaping to make the small rounded corner fit the mold. However, this solution requires clamping the sheet twice, and the production efficiency is not high. Summary of the invention

[0004] The invention provides a punching device for punching processing, so as to solve the problem that the existing punching device has low production efficiency when processing a workpiece with a local negative angle feature.

[0005] A punching device for stamping processing of the present invention adopts the following technical scheme: a punching device for stamping processing, used for stamping a plate, includes a machine base, a punch, a die, a pressure relief mechanism and a plurality of pressure-absorbing balls; the punch and the die are arranged in sequence on the machine base along a first direction, the first direction is a vertical direction, the punch is located above the die, the punch can move toward the die along the first direction and punch the plate; the die is filled with liquid, a forming negative angle is provided on the punch, an electromagnet is provided in the punch, and the electromagnet is located above the forming negative angle; the plate is placed on the die, and a plurality of pressure-absorbing balls are arranged in the die; the pressure-absorbing balls include a sphere and a spherical shell covering the outside of the sphere, the sphere is elastic and compressible, the spherical shell is a metal shell, can be attracted by the electromagnet, and a through hole is opened on the surface of the spherical shell; the pressure relief mechanism is installed on the machine base, and the pressure relief mechanism can keep the liquid pressure in the die at a preset value.

[0006] Furthermore, the negative forming angle is semicircular, and the radius of the pressure suction ball is smaller than the radius of the negative forming angle.

[0007] Furthermore, the sphere of the suction and pressure ball is made of rubber material and foamed in the middle.

[0008] Furthermore, the pressure relief mechanism includes a pressure relief valve, which is an electrically controlled valve. A pressure sensor is provided in the die, and the pressure sensor is electrically connected to the pressure relief valve. When the liquid pressure in the die is greater than a preset value, the pressure relief valve opens, and when it is equal to the preset value, the pressure relief valve closes.

[0009] Furthermore, a pressure relief channel is provided on the die, and the pressure relief channel connects the die and the pressure relief valve.

[0010] Furthermore, the pressure relief channel includes a turbulent section and a drainage section. The turbulent section is a conical structure with a large upper end and a small lower end. Spiral blades are arranged in the turbulent section. The drainage section is connected to the turbulent section, and the pressure relief valve is installed on the drainage section.

[0011] Furthermore, a filter screen is arranged on the turbulent flow section.

[0012] Furthermore, a punching platform is provided on the machine base, and the punching platform can move along the first direction and abut against the end of the plate.

[0013] Furthermore, a sealing strip is provided on the upper end surface of the die.

[0014] Furthermore, a plurality of through holes are provided, and the plurality of through holes are evenly distributed on the surface of the spherical shell.

[0015] The beneficial effects of the present invention are as follows: a stamping device for stamping processing of the present invention is provided with a machine base, a punch, a die, a pressure relief mechanism and a plurality of pressure-absorbing balls. When stamping a plate, the plate is first placed on the die, and then the punch is driven to move to one side of the die to stamp the plate. As the punch moves, the plate will be deformed by the stamping, and the liquid in the die will be continuously squeezed, so that the volume of the liquid in the die is reduced and the pressure of the liquid is increased, so that the liquid can enter the spherical shell from the through hole on the spherical shell, and compress the sphere to consume and absorb the pressure of the liquid. By controlling the pressure of the liquid, the impact force on the die and the punch is reduced, thereby improving the safety during the stamping process. When the liquid pressure reaches the preset value, as the punch continues to move, the pressure relief mechanism is started to keep the pressure of the liquid in the die at the preset value, which is convenient for the forming of the sheet. The electromagnet is started during the downward movement of the punch, and the electromagnet will also move downward synchronously with the punch. When it is a certain distance away from the die, the electromagnet will absorb the spherical shell of the suction and pressure ball, so that multiple suction and pressure balls gather at the position on the sheet corresponding to the forming negative angle of the punch. The suction and pressure balls and liquid pressure work together at the forming negative angle to assist in the forming of the position on the sheet that needs to be processed with a local negative angle, thereby improving the forming effect of the sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of a punching device for punching processing of the present invention;

[0018] Figure 2 It is a disassembled diagram of the overall structure of an embodiment of a punching device for punching processing of the present invention;

[0019] Figure 3 A front view of the overall structure of an embodiment of a punching device for punching processing of the present invention;

[0020] Figure 4 for Figure 3 Sectional view along AA;

[0021] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0022] Figure 6 A schematic diagram of a plate after stamping according to an embodiment of a stamping device for stamping processing of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0024] Figure 8 A schematic diagram of a punch of an embodiment of a punching device for punching processing of the present invention;

[0025] Fig. 9 The figure is a schematic diagram of a pressure-absorbing ball of an embodiment of a punching device for punching processing according to the present invention.

[0026] In the figure: 100, plate; 200, machine base; 210, first driving member; 220, stamping table; 300, punch; 310, negative forming angle; 320, electromagnet; 400, die; 401, sealing strip; 410, pressure relief channel; 420, spiral blade; 430, filter; 500, suction and pressure ball; 501, sphere; 502, spherical shell; 503, through hole; 510, large ball; 520, small ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] An embodiment of a punching device for punching processing of the present invention is as follows Figures 1 to 9 shown.

[0029] A punching device for punching processing is used for punching a plate 100, comprising a machine base 200, a punch 300, a die 400, a pressure relief mechanism and a plurality of suction and pressure balls 500. The punch 300 and the die 400 are arranged in sequence along a first direction on the machine base 200, the first direction being a vertical direction, and the punch 300 is located above the die 400. The punch 300 can move toward the die 400 along the first direction and punch the plate 100. The die 400 is filled with liquid, a negative forming angle 310 is arranged on the punch 300, an electromagnet 320 is arranged in the punch 300, and the electromagnet 320 is located above the negative forming angle 310. The plate 100 is placed on the die 400, and a plurality of suction and pressure balls 500 are arranged in the die 400. The suction ball 500 includes a sphere 501 and a spherical shell 502 covering the sphere 501. The sphere 501 is elastic and compressible. The spherical shell 502 is a metal shell that can be attracted by the electromagnet 320. A through hole 503 is provided on the surface of the spherical shell 502. The pressure relief mechanism is installed on the machine base 200, and the pressure relief mechanism can keep the liquid pressure in the die 400 at a preset value.

[0030] Specifically, a first driving member 210 is disposed on the machine base 200 . The first driving member 210 can drive the punch 300 to move along a first direction. The first driving member 210 is a hydraulic telescopic cylinder.

[0031] Furthermore, a sealing strip 401 is provided on the upper end surface of the die 400 , and the sealing strip 401 is provided to improve the sealing performance of the plate 100 during stamping.

[0032] A plurality of through holes 503 are provided, and the plurality of through holes 503 are evenly distributed on the surface of the spherical shell 502 .

[0033] This embodiment sets a machine base 200, a punch 300, a die 400, a pressure relief mechanism and a plurality of pressure-absorbing balls 500. When punching the plate 100, the plate 100 is first placed on the die 400, and then the punch 300 is driven to move to one side of the die 400 to punch the plate 100. As the punch 300 moves, the plate 100 is deformed by the punching, and the liquid in the die 400 is continuously squeezed, so that the volume of the liquid in the die 400 is reduced and the pressure of the liquid is increased, so that the liquid can enter the spherical shell 502 from the through hole 503 on the spherical shell 502, and compress the sphere 501 to consume and absorb the pressure of the liquid. By controlling the pressure of the liquid, the impact force on the die 400 and the punch 300 is reduced, thereby improving the safety during the stamping process.

[0034] When the liquid pressure reaches the preset value, as the punch 300 continues to move, the pressure relief mechanism is started to keep the pressure of the liquid in the die 400 at the preset value, which is convenient for the forming of the sheet 100, and the electromagnet 320 is started during the downward movement of the punch 300. The electromagnet 320 will also move downward synchronously with the punch 300, and when it is at a certain distance from the die 400, the electromagnet 320 will absorb the ball shell 502 of the suction and pressure ball 500, so that multiple suction and pressure balls 500 are gathered at the position on the sheet 100 corresponding to the forming negative angle 310 of the punch 300, and the suction and pressure balls 500 and the liquid pressure are used together to act at the forming negative angle 310 to assist in the forming of the position on the sheet 100 where the local negative angle needs to be processed, thereby improving the forming effect of the sheet 100.

[0035] In this embodiment, the negative molding angle 310 is semicircular, and the radius of the pressure-absorbing ball 500 is smaller than the radius of the negative molding angle 310 .

[0036] Furthermore, the radius of the pressure-absorbing ball 500 is smaller than 1 / 5 of the radius of the negative molding angle 310 .

[0037] The ball 501 of the suction and pressure ball 500 is made of rubber with foam in the middle. Alternatively, the ball 501 is made of rubber outer layer with a hollow structure in the middle; or the hollow part is filled with gas, thereby making the ball 501 easier to deform.

[0038] By making the radius of the suction and pressure ball 500 smaller than the radius of the forming negative angle 310 and making the radius of the suction and pressure ball 500 not exceed 1 / 5 of the radius of the forming negative angle 310, when in use, multiple suction and pressure balls 500 can be gathered at the forming negative angle 310 as much as possible, thereby increasing the force of the suction and pressure balls 500 on the forming negative angle 310, and further improving the forming quality of the position on the plate 100 where the local negative angle needs to be processed.

[0039] In this embodiment, a punching table 220 is disposed on the machine base 200. The punching table 220 can move along a first direction and abut against the end of the plate 100. The plate 100 is square, and the punching table 220 can abut against four end surfaces of the plate 100.

[0040] Specifically, a second driving member is disposed on the machine base 200 , and the second driving member can drive the punching table 220 to move along the first direction. The second driving member is a hydraulic telescopic cylinder.

[0041] In this embodiment, the pressure relief mechanism includes a pressure relief valve, which is an electrically controlled valve. A pressure sensor is provided in the die 400, and the pressure sensor is electrically connected to the pressure relief valve. When the liquid pressure in the die 400 is greater than a preset value, the pressure relief valve opens, and when it is equal to the preset value, the pressure relief valve closes.

[0042] In this embodiment, a pressure relief channel 410 is provided on the female mold 400 , and the pressure relief channel 410 connects the female mold 400 and the pressure relief valve.

[0043] In this embodiment, a stamping device for stamping processing also includes a control system, and the first driving member 210 and the second driving member are both electrically connected to the control system, and the control system can control the first driving member 210 and the second driving member to start or stop.

[0044] The electromagnet 320 is electrically connected to a control system, and the control system can control the electromagnet 320 to start or stop.

[0045] The pressure relief valve and pressure sensor are both electrically connected to the control system. When in use, when the pressure sensor senses that the parameter of the liquid pressure in the die 400 is greater than a preset value, the pressure sensor can feed back the sensed pressure value to the control system, and control the pressure relief valve to open through the control system. Conversely, when the pressure sensor senses that the parameter of the liquid pressure in the die 400 is less than a preset value, the pressure sensor can feed back the sensed pressure value to the control system, and control the pressure relief valve to close through the control system.

[0046] In another possible embodiment, the pressure relief channel 410 includes a turbulent section and a drainage section. The turbulent section is a conical structure with a larger upper end and a smaller lower end. A spiral blade 420 is arranged in the turbulent section. The drainage section is connected to the turbulent section, and the pressure relief valve is installed on the drainage section.

[0047] Furthermore, a filter screen 430 is provided on the turbulent section. The filter screen 430 has a plurality of filter holes evenly distributed thereon, and only allows the liquid to flow from the filter holes to the pressure relief channel 410 .

[0048] By setting a turbulent section and setting a spiral blade 420 in the turbulent section, when the pressure relief valve is opened, the liquid in the die 400 will flow into the turbulent section after passing through the filter screen 430, and under the guidance of the turbulent section with a conical structure and the spiral blade 420 in the turbulent section, the liquid can flow in a spiral shape, and has a disturbing effect on the liquid similar to an eddy current, so that the suction and pressure ball 500 can rotate with the liquid, and more suction and pressure balls 500 are gathered into the range that the electromagnet 320 can adsorb, thereby improving the aggregation of the suction and pressure balls 500, and the setting of the filter screen 430 can prevent the suction and pressure balls 500 from falling into the turbulent section.

[0049] In another possible embodiment, the plurality of suction and pressure balls 500 include a plurality of large balls 510 and a plurality of small balls 520, the structures of the large balls 510 and the small balls 520 are equal, the diameter of the large balls 510 is greater than the diameter of the small balls 520, the mass of the large balls 510 is greater than the mass of the small balls 520, and the number of the large balls 510 is less than the number of the small balls 520. The radius of the small balls 520 is less than 1 / 5 of the radius of the forming negative angle 310. The radius of the large balls 510 is less than 1 / 2 of the forming negative angle 310.

[0050] By providing a plurality of large balls 510 and a plurality of small balls 520, the small balls 520 can be attached to the position of the negative forming angle 310 on the plate 100 as much as possible, thereby ensuring the forming quality of the plate 100. The sphere 501 of the large ball 510 can ensure an effective compression amount, thereby further controlling the pressure of the liquid and improving the safety during the stamping process.

[0051] In combination with the above embodiments, the specific working process is as follows:

[0052] When stamping the sheet 100, the sheet 100 is first placed on the die 400, and then the stamping table 220 and the punch 300 are driven to move synchronously. When the stamping table 220 abuts against the end of the sheet 100, the punch 300 is continued to be driven to move. As the punch 300 moves, the sheet 100 will be deformed by the stamping, and the liquid in the die 400 is continuously squeezed, so that the volume of the liquid in the die 400 is reduced and the liquid pressure is increased, so that the liquid can enter the spherical shell 502 from the through hole 503 on the spherical shell 502, and compress the sphere 501, so as to consume and absorb the pressure of the liquid. By controlling the pressure of the liquid, the impact force on the die 400 and the punch 300 is reduced, thereby improving the safety during the stamping process.

[0053] When the liquid pressure reaches the preset value, as the punch 300 continues to move, the pressure relief mechanism is started to keep the pressure of the liquid in the die 400 at the preset value, which is convenient for the forming of the sheet 100, and the electromagnet 320 is started during the downward movement of the punch 300. The electromagnet 320 will also move downward synchronously with the punch 300, and when it is at a certain distance from the die 400, the electromagnet 320 will absorb the ball shell 502 of the suction and pressure ball 500, so that multiple suction and pressure balls 500 are gathered on the sheet 100 at a position corresponding to the forming negative angle 310 of the punch 300, and the ball shell 502 and the liquid pressure are used together to act at the forming negative angle 310 to assist in the forming of the position on the sheet 100 where the local negative angle needs to be processed, thereby improving the forming effect of the sheet 100.

[0054] After the deep drawing is completed, the punch is lifted and the formed sheet 100 is taken out.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A punching device for punching processing, used for punching a plate, characterized in that: It includes a machine base, a punch, a die, a pressure relief mechanism and a plurality of pressure-absorbing balls; the punch and the die are arranged on the machine base in sequence along a first direction, the first direction is a vertical direction, the punch is located above the die, and the punch can move toward the die along the first direction and punch the plate; The die is filled with liquid, the punch is provided with a forming negative angle, an electromagnet is provided in the punch, and the electromagnet is located above the forming negative angle; the plate is placed on the die, and a plurality of suction and pressure balls are provided in the die; the suction and pressure ball comprises a sphere and a spherical shell covering the outside of the sphere, the sphere is elastic and compressible, the spherical shell is a metal shell, which can be attracted by the electromagnet, and a through hole is provided on the surface of the spherical shell; the pressure relief mechanism is installed on the machine base, and the pressure relief mechanism can keep the liquid pressure in the die at a preset value, the forming negative angle is semicircular, the radius of the suction and pressure ball is smaller than the radius of the forming negative angle, the sphere of the suction and pressure ball is made of rubber material, and foaming is formed in the middle; the electromagnet is started during the downward movement of the punch, and the electromagnet will also move downward synchronously with the punch, and when it is a certain distance away from the die, the electromagnet will absorb the spherical shell of the suction and pressure ball, so that a plurality of suction and pressure balls gather at a position on the plate corresponding to the forming negative angle of the punch, and the suction and pressure balls and liquid pressure act together at the forming negative angle to assist in the forming of the position on the plate where the local negative angle needs to be processed.

2. A punching device for punching according to claim 1, characterized in that: The pressure relief mechanism includes a pressure relief valve, which is an electrically controlled valve. A pressure sensor is provided in the die, and the pressure sensor is electrically connected to the pressure relief valve. When the liquid pressure in the die is greater than a preset value, the pressure relief valve opens, and when it is equal to the preset value, the pressure relief valve closes.

3. A punching device for punching according to claim 2, characterized in that: A pressure relief channel is provided on the die, and the pressure relief channel is connected with the die and the pressure relief valve.

4. A punching device for punching processing according to claim 3, characterized in that: The pressure relief channel includes a turbulent section and a discharge section. The turbulent section is a conical structure with a large upper end and a small lower end. Spiral blades are arranged in the turbulent section. The discharge section is connected to the turbulent section, and the pressure relief valve is installed on the discharge section.

5. A punching device for punching according to claim 4, characterized in that: A filter is arranged on the turbulent flow section.

6. A punching device for punching processing according to claim 1, characterized in that: A punching platform is arranged on the machine base, and the punching platform can move along a first direction and abut against the end of the plate.

7. A punching device for punching according to claim 1, characterized in that: The upper end surface of the die is provided with a sealing strip.

8. A punching device for punching processing according to claim 1, characterized in that: A plurality of through holes are arranged, and the plurality of through holes are evenly distributed on the surface of the spherical shell.

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