Independently-controlled punching needle mechanism of press machine

Abstract

The invention relates to an independently controllable punching needle mechanism of a press machine, which is used for being arranged on the press machine and matched with a working table below to punch leather, and comprises a ventilation seat, a plurality of punching needles and a plurality of punching needles, the punching needles are arranged in the length direction of the cavity and are movably connected to the ventilation base, and elastic pieces corresponding to the punching needles are arranged on the ventilation base; the number of the pushing assemblies corresponds to that of the punching needles, and the pushing assemblies abut against the first ends of the punching needles respectively and are used for driving the second ends of the punching needles to overcome elastic thrust and stretch out along the surface of the ventilation base. According to the technical scheme, after leather punching machining is conducted, the punching needle can be lifted in advance, the stability of leather is kept, and therefore the situation that the leather slightly moves can be avoided, and the stability of the leather in the machining process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of leather punching equipment, in particular to a punch mechanism of an independently controllable press. BACKGROUND

[0002] Leather material is very comfortable due to its flexibility and is loved by people and is widely used in many fields. In the processing of leather material, punching processing is often performed on the leather material for the sake of beauty or to increase air permeability.

[0003] However, the existing punching die has a simple structure and is generally divided into an upper die and a lower die. The upper die is installed on a punching machine, the leather is pulled over the lower die, the upper die is driven downward by the punching machine, the punch pins at the bottom of the upper die penetrate the leather and are inserted into the punching holes of the lower die, and the punching processing of the leather is completed. However, when the upper die rises and separates from the leather, the upper die rises and also causes slight movement of the leather due to the friction between the punch pins on the upper die and the inner walls of the holes punched in the leather, which causes the conveying direction of the rear part of the leather to deviate, resulting in inaccurate subsequent punching positions and unnecessary waste, which is very inconvenient and greatly reduces the production efficiency.

[0004] In addition, when the leather is punched, the punch pins resist the leather material and cause the part of the leather opposite to the punching hole to be pushed into the punching hole and then be cut off under the shearing action of the punch pins and the edges of the punching hole. At this time, a hole is formed on the leather. In this process, when the hole is about to be punched, the hole and the burr are torn at the connection instead of being cut off due to the high flexibility of the leather. Therefore, a circle of burrs is easily formed on the leather hole, which affects the overall beauty of the leather.

[0005] Therefore, there is an urgent need for a new technical solution to solve at least one of the above technical problems. SUMMARY

[0006] The purpose of the present application is to provide a punch mechanism of an independently controllable press to solve the above technical problems. The present application adopts the following technical solutions: The punch mechanism of the independently controllable press is installed on the press and cooperates with the workbench below to punch the leather. The punch mechanism comprises: A ventilation seat is internally provided with a chamber along the length direction; A plurality of punch pins are arranged along the length direction of the chamber and movably connected to the ventilation seat. The ventilation seat is provided with elastic members corresponding to the punch pins, so that the first end of the punch pin elastically extends into the chamber and the second end is retracted into the surface of the ventilation seat; A pushing assembly is provided with a number corresponding to the punch pins and abuts the first end of the punch pins respectively to drive the second end of the punch pins to extend along the surface of the ventilation seat against the elastic force.

[0007] Further, the pushing assembly comprises: A floating block is slidingly connected in the chamber, and a cam surface is provided on the floating block, and the first end of the punch pin elastically abuts on the cam surface; A drive cylinder is fixedly installed on the ventilation seat and drivingly connected with the floating block to drive the floating block to move linearly and reciprocally and drive the punch pin to extend against the elastic force of the elastic member under the pushing of the cam surface.

[0008] Further, the floating block comprises a main body portion, one end of the main body portion is provided with a linkage groove extending along the sliding direction of the floating block, and a limiting piece is provided in the linkage groove, one end of the limiting piece is connected to the inner wall of the chamber, and the other end of the limiting piece passes through the linkage groove and is movably limited therein.

[0009] Further, one end of the main body portion away from the linkage groove is formed with a cam portion, the cam portion comprises two abutting surfaces with different heights, and a transition surface with a circular arc surface is provided between the two abutting surfaces, and the two abutting surfaces and the transition surface define the cam surface.

[0010] Further, the punch pin is provided with a processing hole in the axial direction, and the processing hole is provided with an outlet and an inlet at the first end and the second end respectively, and the edge of the inlet is provided with a blade portion for cutting leather.

[0011] Further, the outlet of the punch pin is provided on the circumferential surface of the first end of the punch pin, and the first end of the punch pin is provided with a circular arc surface.

[0012] Further, the ventilation seat is formed with openings at both ends respectively for the chamber to communicate with the outside for air flow, and one of the openings of the chamber is connected with a blowing device through a pipeline, the blowing device provides high-speed airflow into the chamber through the pipeline, and the airflow flows rapidly along the outlet of the punch pin, so that the airflow in the processing hole flows from the inlet to the outlet.

[0013] Further, the ventilation seat comprises: A seat body is provided with a slot on the seat body along the length direction, and the two ends of the slot are respectively provided with ports. A bottom cover is fixedly arranged on the seat body and does not close the opening of the slot, so that the slot defines the chamber, the port defines the opening of the chamber, and the punch needle is slidingly connected to the bottom cover.

[0014] Further, an elastic body is arranged on the ventilation seat and fixedly arranged on the bottom cover, which is elastically deformed when the elastic body is abutted against the leather. The elastic body is provided with a hole for the second end of the punch needle to extend out of or retract into.

[0015] Further, the bottom cover comprises A bottom plate is fixedly arranged on the seat body and closes the opening of the slot. The bottom plate is provided with a through hole for the punch needle to pass through. The bottom cover further comprises A positioning plate is fixedly arranged on the bottom plate. The positioning plate is provided with a positioning groove corresponding to the through hole. The positioning groove is provided with a positioning hole coaxial with the through hole for the punch needle to pass through. The punch needle comprises a needle body provided with a convex ring movably connected to the positioning groove. The elastic member is arranged between the convex ring and the bottom of the positioning groove to provide an elastic pushing force towards the chamber.

[0016] The present application has the following beneficial effects: The punch needle mechanism is used to be assembled on the upper die of the press machine. During the punching process, the upper die set is driven by the press machine to move towards the workbench surface below, so as to realize the punching operation on the leather pulled to the workbench surface. When the upper die is driven by the press machine to move towards the workbench surface below, the pushing assembly touches the first end of the punch needle, so as to overcome the elastic force of the elastic element, and then the second end of the punch needle can be stretched out on the surface of the ventilation seat. At this time, after the upper die moves to the workbench surface position, the second end of the punch needle stretched out on the surface of the ventilation seat punches the leather. In this embodiment, the length of the second end of the punch needle stretched out on the surface of the ventilation seat can be set in advance according to the thickness size of the leather, the punching force and speed of the upper die, and other processing conditions, so as to ensure that the leather can be punched during the punching operation, and the punch needle is prevented from being damaged. It is explained that when the punch needle completes the punching operation on the leather, the ventilation seat is pressed on the workbench below under the driving of the upper die. At this time, the leather is kept in a stable state under the pressing action of the ventilation seat and the workbench. When the pushing assembly releases the pressure on the punch needle, the second end of the punch needle moves towards the ventilation seat under the elastic pushing force of the elastic element and is retracted into the surface of the ventilation seat. That is, when the punch needle rises in the hole processed on the leather in the stable state that the leather is clamped and kept by the ventilation seat and the workbench, the leather will not be moved under the action of friction, so as to ensure the stability of the leather during the punching process, and further ensure the stability and accuracy of the leather during the punching process.

[0017] As can be known from the above, the punch needle mechanism of the press machine provided by the embodiment of the application can be independently controlled. The punch needle is slidably arranged on the ventilation seat, and a pair of elastic elements are arranged on the ventilation seat to provide elastic support for the first end of the punch needle to be elastically stretched into the chamber and the second end to be elastically retracted into the surface of the ventilation seat. During the punching process, the first end of the punch needle in the chamber is touched by the pushing assembly under the driving of the pushing assembly, so that the second end of the punch needle is stretched out of the surface of the ventilation seat after overcoming the elastic force, so that the second end can be stretched out of the surface of the ventilation seat. Then, when the upper die is driven by the press machine to move towards the workbench surface, the leather pulled to the workbench can be punched. After the punching is completed, the pushing assembly releases the pressure on the punch needle, so that the punch needle is retracted under the elastic pushing force of the elastic element. At this time, since the leather is pressed tightly by the ventilation seat, the leather will not be displaced when the upper die rises to pull the leather, so as to avoid the case that the punching precision of the leather is not high. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The figure is a structural schematic diagram of the application.

[0019] Figure 2is a sectional view of the whole invention.

[0020] Figure 3 is Figure 2 is a partial enlarged view at A in the middle.

[0021] Figure 4 is a structural schematic view of the invention after removing the seat body, with the punch pin in the retracted state.

[0022] Figure 5 is Figure 4 is a partial enlarged view at B in the middle.

[0023] Figure 6 is a structural schematic view of the invention after removing the seat body, with the punch pin in the top-touched extended state.

[0024] Figure 7 is Figure 6 is a partial enlarged view at C in the middle.

[0025] Figure 8 is a sectional view of the invention in the explosion state.

[0026] Figure 9 is Figure 8 is a partial enlarged view at D in the middle.

[0027] Figure 10 is a structural schematic view of the punch pin in the invention.

[0028] Figure 11 is a sectional view of the punch pin in the invention.

[0029] Figure 12 is a partial enlarged view of the push assembly in the invention.

[0030] In the figure: 100-ventilation seat; 101-chamber; 200-punch pin; 201-first end; 202-second end; 300-push assembly; 310-floating block; 311-cam surface; 320-driving cylinder; 312-main body part; 313-linkage groove; 314-limiting part; 315-cam part; 316-abutment surface; 317-transition surface; 210-processing hole; 211-outlet; 212-inlet; 110-seat body; 111-slot; 120-bottom cover; 130-elastic body; 131-hole site; 121-bottom plate; 1211-through hole; 122-positioning plate; 1221-positioning groove; 1222-positioning hole; 120-punch pin main body; 121-convex ring. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of those skilled in the art, the invention will be further described below in conjunction with the embodiments and the accompanying drawings. The content mentioned in the embodiments is not a limitation of the invention. The invention will be described in detail below in conjunction with the drawings.

[0032] The embodiment of the present application provides a punch pin 200 mechanism of an independently controllable press machine, the punch pin 200 is slidably arranged on the ventilation base 100, and a pair of punch pins 200 are arranged on the ventilation base 100 and provided with elastic members, the first end 201 of the punch pin 200 is elastically extended into the cavity 101, and the second end 202 is elastically retracted into the surface of the ventilation base 100, in the process of punching, under the driving of the pushing assembly 300, the first end 201 of the punch pin 200 located in the cavity 101 is abutted, so that the second end 202 of the punch pin 200 is extended out of the surface of the ventilation base 100 after overcoming the elastic force, so that the punch pin 200 can be extended out of the surface of the base, and then the leather pulled to the workbench can be punched when the upper die of the press machine is driven to move towards the workbench surface, after the punching is completed, the punch pin 200 is abutted by the pushing assembly 300, so that the punch pin 200 can be retracted under the elastic pushing force of the elastic member, at this time, since the leather is pressed by the ventilation base 100, the leather is prevented from being displaced when the upper die is lifted, and the punching precision of the leather is prevented from being low.

[0033] Specifically, as shown in the Figures 1-12 The embodiment of the present application provides a punch pin 200 mechanism of an independently controllable press machine, the punch pin 200 is slidably arranged on the ventilation base 100, and a pair of punch pins 200 are arranged on the ventilation base 100 and provided with elastic members, the first end 201 of the punch pin 200 is elastically extended into the cavity 101, and the second end 202 is elastically retracted into the surface of the ventilation base 100, in the process of punching, under the driving of the pushing assembly 300, the first end 201 of the punch pin 200 located in the cavity 101 is abutted, so that the second end 202 of the punch pin 200 is extended out of the surface of the ventilation base 100 after overcoming the elastic force, so that the punch pin 200 can be extended out of the surface of the base, and then the leather pulled to the workbench can be punched when the upper die of the press machine is driven to move towards the workbench surface, after the punching is completed, the punch pin 200 is abutted by the pushing assembly 300, so that the punch pin 200 can be retracted under the elastic pushing force of the elastic member, at this time, since the leather is pressed by the ventilation base 100, the leather is prevented from being displaced when the upper die is lifted, and the punching precision of the leather is prevented from being low.

[0034] The punch needle 200 mechanism is used to be assembled on the upper die of the press machine. During the punching process, the upper die set is driven by the press machine to move towards the workbench surface below, so as to realize the punching operation on the leather pulled to the workbench surface. When the upper die is driven by the press machine to move towards the workbench surface below, the pushing assembly 300 touches the first end 201 of the punch needle 200, so as to overcome the elastic force of the elastic member, and then the second end 202 of the punch needle 200 can be stretched out on the surface of the ventilation seat 100. At this time, after the upper die moves to the workbench surface position, the second end 202 of the punch needle 200 stretched out on the surface of the ventilation seat 100 punches the leather. In this embodiment, the length of the second end 202 of the punch needle 200 stretched out on the surface of the ventilation seat 100 can be set in advance according to the thickness size of the leather, the punching force and speed of the upper die, and other processing conditions, so as to ensure that the leather is punched during the punching operation, and the punch needle 200 is prevented from being damaged. It is explained that when the punch needle 200 completes the punching operation on the leather, the ventilation seat 100 is pressed on the workbench below under the driving of the upper die. At this time, the leather is kept in a stable state under the pressing action of the ventilation seat 100 and the workbench. When the pushing assembly 300 releases the low pressure of the punch needle 200, the second end 202 of the punch needle 200 moves towards the ventilation seat 100 under the elastic pushing force of the elastic member and is retracted into the surface of the ventilation seat 100. That is, when the punch needle 200 rises in the hole processed on the leather in the stable state that the leather is clamped and kept by the ventilation seat 100 and the workbench, the leather will not move under the action of friction, so as to ensure the stability of the leather during the punching process, and further ensure the stability and accuracy of the leather during the punching process.

[0035] As Figures 4-9 , 12, the pushing assembly 300 is used to touch the punch needle 200 movably arranged on the ventilation seat 100. When started, the pushing assembly 300 can push the punch needle 200 to overcome the elastic force of the elastic member, and the second end 202 is stretched out on the surface of the ventilation seat 100 to punch the leather. In this embodiment, the pushing assembly 300 comprises a floating block 310 and a driving cylinder 320 in transmission connection with the floating block 310. The floating block 310 is slidably connected in the chamber 101, and the cam surface 311 is arranged on the floating block 310. The first end 201 of the punch needle 200 elastically abuts on the cam surface 311. The driving cylinder 320 is fixedly installed on the ventilation seat 100 and is in transmission connection with the floating block 310, so as to drive the floating block 310 to move linearly and reciprocally, and drive the punch needle 200 to stretch out under the pushing of the cam surface 311 and overcome the elastic force of the elastic member.

[0036] In the process of starting the drive floating block 310 to move, the punch pin 200 is extended into the chamber 101 and in contact with the cam surface 311 under the action of the elastic member. In the process of driving the floating block 310 to move by the drive cylinder 320, the first end 201 of the punch pin 200 can move along the profile of the cam surface 311 relative to the cam surface 311, so as to realize the action of pushing out or retracting the punch pin 200 under the action of the cam surface 311. In the process of needing to punch, the drive cylinder 320 drives the floating block 310 to move, and then pushes the first end 201 of the punch pin 200 to move along the axis direction through the cam surface 311, that is, the punch pin 200 overcomes the elastic pushing force of the elastic member, and the second end 202 is extended out of the surface of the vent seat 100 to punch the leather when the upper die moves towards the workbench surface. After the punching is completed, the drive cylinder 320 drives the floating block 310 to move again, so that the punch pin 200 is driven to move towards the chamber 101 under the elastic force of the elastic member under the driving of the cam surface 311, and then the second end 202 of the punch pin 200 is retracted into the surface of the vent seat 100, so that the punch pin 200 is withdrawn in the leather under the condition that the vent seat 100 and the workbench surface clamp the leather, avoiding pulling the leather in the process of withdrawing the punch pin 200, and avoiding slight displacement of the leather.

[0037] In the embodiment, as shown in Figure 12 The floating block 310 includes a main body 312, one end of the main body 312 is provided with a linkage groove 313 extending along the sliding direction of the floating block 310, and the linkage groove 313 is provided with a limiting member 314 connected to the inner wall of the chamber 101 at one end and passing through the linkage groove 313 and being limited to move in the linkage groove 313 at the other end.

[0038] The drive cylinder 320 is in transmission connection with the main body 312, and in the process of driving the main body 312 to move, the movement stroke of the main body 312 is limited by the linkage groove 313 and the limiting member 314, and by providing one main body 312, the contact area of the floating block 310 with the inner wall of the chamber 101 can be increased, so as to improve the stability of the movement of the floating block 310, and then the precision of pushing the punch pin 200 can be improved.

[0039] In the embodiment, the cam portion 315 is formed at one end of the body portion 312 away from the linkage groove 313, and the cam surface 311 is formed on the cam portion 315. In the embodiment, the cam surface 311 is formed by the following structure. Specifically, the cam portion 315 includes two abutting surfaces 316 with different height dimensions, and a transition surface 317 with a circular arc surface is arranged between the two abutting surfaces 316. When the driving cylinder 320 pushes the floating block 310 to move, the first end 201 of the punch pin 200 is converted from the low abutting surface 316 to the high abutting surface 316, and in the process, the punch pin 200 is gradually pressed against the pie and continuously overcomes the elastic force of the elastic member under the action of the transition surface 317, so that the second end 202 of the punch pin 200 gradually extends out of the surface of the ventilation seat 100. When the first end 201 of the punch pin 200 and the high abutting surface 316 are in contact with each other, the second end 202 of the punch pin 200 extends out of the surface of the ventilation seat 100 to the maximum extent. It is conceivable that when the driving cylinder 320 drives the floating block 310 to retreat, the first end 201 of the punch pin 200 is converted from the high abutting surface 316 to the low abutting surface 316. Under the guidance of the transition surface 317, the cam surface 311 gradually contacts the punch pin 200, and the punch pin 200 is gradually moved toward the chamber 101 under the elastic force of the elastic member, so that the second end 202 of the punch pin 200 gradually retracts into the surface of the ventilation seat 100.

[0040] In the embodiment, the punch pin 200 is arranged to change the previous punching processing mode, so as to reduce the burrs of the punched hole of the processed leather and ensure the overall neatness of the leather. Figures 1-11 As shown, the punch pin 200 is arranged along the axis direction and has a processing hole 210, and the processing hole 210 is arranged with an outlet 211 and an inlet 212 at the first end 201 and the second end 202, respectively. The edge of the inlet 212 is provided with a blade portion for cutting the leather. At the same time, the ventilation seat 100 is formed with openings at both ends for the chamber 101 to communicate with the outside for air flow, and one of the openings of the chamber 101 is connected with a blowing device through a pipeline. The blowing device provides high-speed airflow into the chamber 101 through the pipeline, and the airflow flows rapidly along the outlet 211 of the punch pin 200, so that the airflow in the processing hole 210 flows from the inlet 212 to the outlet 211.

[0041] In the process of punching the leather, the upper die drives the ventilation seat 100 to move towards the workbench surface, so that the second end 202 of the punch pin 200 protruding from the surface of the ventilation seat 100 contacts and presses the leather. It is worth noting that the workbench surface for supporting the leather can be formed by a whole plate, and there is no corresponding hole corresponding to the punch pin 200 as in the prior art. During the punching process, The leather is supported by the hard workbench on the lower side, and the punch pin 200 is provided with a hollow structure with a processing hole 210, so that after the punch pin 200 contacts the leather, the blade at the inlet 212 of the punch pin 200 can abut against the leather. Under the combined action of the downward pressing of the punch pin 200 and the hard support of the leather on the lower side, the punch pin 200 cuts the leather, thereby processing the leather to form a hole 131. In this process, the lower side of the leather is hard supported, thereby avoiding the flexible extension of the leather under the pressure of the punch pin 200, and avoiding the tearing of the leather. The leather is punched on the leather in a cutting manner, so that the inner wall of the hole 131 formed on the leather has a smooth and clean surface, reducing the occurrence of burrs, and improving the overall cleanliness of the leather. In addition, the ventilation seat 100 is provided with an opening at each end for the chamber 101 to communicate with the outside for airflow, and one of the openings is connected with the air blowing device, so that the airflow generated by the air blowing device flows rapidly in the chamber 101. At this time, the chamber 101 forms an air duct for airflow, and in the process of airflow flowing rapidly along the outlet 211 of the punch pin 200, the airflow in the processing hole 210 flows from the inlet 212 to the outlet 211, thereby moving the cut piece in the processing hole 210 towards the outlet 211 under the action of the airflow, and moving into the chamber 101 through the outlet 211, and being blown towards the other opening of the chamber 101 under the action of the airflow in the chamber 101, thereby discharging the cut piece.

[0042] According to the technical solution, the leather is hard supported on the lower side, and the hole 131 is processed by cutting, thereby avoiding the tearing of the inner edge of the hole 131 of the leather during the punching process, and reducing the burrs on the inner wall of the hole 131 and maintaining the smoothness.

[0043] In this embodiment, in order to ensure that the cut piece in the processing hole 210 can be smoothly discharged, as shown in Figure 11 the outlet 211 of the punch pin 200 is arranged on the circumferential surface of the first end 201 of the punch pin 200, and the first end 201 of the punch pin 200 is provided with a circular arc surface.

[0044] By setting the outlet 211 on the circumferential surface of the first end 201, the state in which the first end 201 of the punch 200 and the cam surface 311 abut against each other during the process of the floating block 310 driving the punch 200 will not interfere with the discharge of the cut piece. This allows the cut piece to move smoothly along the processing hole 210 into the chamber 101 and be discharged to the outside under the action of the airflow in the chamber 101.

[0045] In this embodiment, as Figures 8-9 As shown, an example of the specific structure of the ventilation seat 100 is given. The ventilation seat 100 in this technical solution includes a seat body 100, a bottom cover 120, and an elastic body 130. A groove 111 is provided on the seat body 100 along its length, and ports are provided at both ends of the groove 111. The bottom cover 120 is fixedly installed on the seat body 100 and does not close the opening of the groove 111, so that the groove 111 defines the chamber 101 and the ports define the opening of the chamber 101. The punch 200 is slidably connected to the bottom cover 120. The elastic body 130 is fixedly installed on the bottom cover 120 and is used to undergo elastic deformation when docking with leather. The elastic body 130 is provided with a hole 131 for the second end 202 of the punch 200 to extend or retract.

[0046] A groove 111 is machined along the length of the base 100, and two ports are provided at both ends of the groove 111. The bottom cover 120 closes the opening of the groove 111, thereby forming a chamber 101 extending along the length of the base 100. The ports of the groove 111 constitute the opening of the chamber 101. This arrangement facilitates the installation of the push assembly 300 and the punch 200. An elastic body 130 is provided on the bottom cover 120 to provide a buffer during the punching process of the leather. Furthermore, during the clamping process of the leather, the elastic body 130 provides cushioning, preventing concentrated pressure on the leather and avoiding obvious indentations that could affect the quality of the leather. In this embodiment, the elastic body 130 can be made of a material with a certain degree of elasticity, such as sponge, plastic, or silicone, to provide elastic cushioning for the clamping wheel during the clamping process, preventing obvious indentations on the leather.

[0047] In this technical solution, to further improve the ease of installation of the punch 200, such as... Figure 11As shown, the bottom cover 120 comprises a bottom plate 121 and a positioning plate 122, wherein the bottom plate 121 is fixedly arranged on the seat body 100 and closes the opening of the slot 111, and a through hole 1211 for the punch pin 200 to pass through is formed on the bottom plate 121, the positioning plate 122 is fixedly arranged on the bottom plate 121, and a positioning groove 1221 is arranged at a position corresponding to the through hole 1211, and a positioning hole 1222 coaxial with the through hole 1211 for the punch pin 200 to pass through is arranged in the positioning groove 1221; at the same time, the punch pin 200 comprises a pin body 220, and a convex ring 221 is formed on the pin body 220, the convex ring 221 is movably connected in the positioning groove 1221, and an elastic member is arranged between the convex ring 221 and the bottom of the positioning groove 1221 to provide an elastic pushing force towards the chamber 101. During installation, the two ends of the punch pin 200 are respectively arranged in the through hole 1211 and the positioning hole 1222, and an elastic member is arranged in the positioning groove 1221, which is a spring in this embodiment, so that after the bottom plate 121 and the positioning plate 122 are fixedly connected with each other, the punch pin 200 can be movably arranged on the bottom cover 120, and under the action of the elastic member, the first end 201 of the punch pin 200 can be kept protruding into the chamber 101.

[0048] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification made to the above embodiment within the scope of the technical solution of the present application are also within the scope of the present application.

Claims

1. A punch mechanism of an independently controllable press machine, which is arranged on the press machine and cooperates with the lower worktable to punch the leather, characterized in that, The utility model provides a kind of leather cutting device, including: Ventilation seat, a chamber is opened in length direction inside the ventilation seat; Punch pin, the punch pin includes several, and it is arranged in the length direction of the chamber and movably connected on the ventilation seat, the ventilation seat is provided with elastic member corresponding to the punch pin respectively, so that the first end of the punch pin elastically extends into the chamber, and the second end is retracted into the surface of the ventilation seat; Pushing assembly, the pushing assembly is provided with the number corresponding to the punch pin, and the first end of the punch pin is respectively abutted, to drive the second end of the punch pin to overcome the elastic force and extend along the surface of the ventilation seat.

2. The independently controllable punch mechanism of the press according to claim 1, characterized in that, The pushing assembly includes: Floating block, the floating block is slidably connected in the chamber, and the cam surface is provided on the floating block, and the first end of the punch pin is elastically abutted on the cam surface; Drive cylinder, the drive cylinder is fixedly installed on the ventilation seat, and is drivingly connected with the floating block, to drive the floating block to move linearly reciprocatingly, and to drive the punch pin to extend against the elastic force of the elastic member under the pushing of the cam surface.

3. The independently controllable punch mechanism of the press according to claim 2, characterized in that, The floating block includes a main body portion, one end of the main body portion is provided with a linkage groove extending in the sliding direction of the floating block, and a limiting member is provided in the linkage groove, one end of the limiting member is connected to the inner wall of the chamber, and the other end of the limiting member passes through the linkage groove and is movably limited in the linkage groove.

4. The independently controllable punch mechanism of the press according to claim 3, characterized in that, One end of the main body portion away from the linkage groove is formed with a cam portion, the cam portion includes two abutting surfaces with different heights, and a transition surface with a circular arc surface is provided between the two abutting surfaces, and the two abutting surfaces and the transition surface define the cam surface.

5. The independently controllable punch mechanism of the press according to claim 1, characterized in that, The punch pin is provided with a processing hole in the axial direction, and the processing hole is provided with an outlet and an inlet at the first end and the second end respectively, and the edge of the inlet is provided with a blade portion for cutting leather.

6. The independently controllable punch mechanism of the press according to claim 5, characterized in that, The outlet of the punch pin is provided on the circumferential surface of the first end of the punch pin, and the first end of the punch pin is provided with a circular arc surface.

7. The independently controllable punch mechanism of the press according to claim 5, characterized in that, The ventilation seat is formed with openings at both ends for the chamber to communicate with the outside for airflow to pass through, and one of the openings of the chamber is connected with a blowing device through a pipeline, the blowing device provides high-speed airflow into the chamber through the pipeline, and the airflow flows rapidly through the outlet of the punch pin, so that the airflow in the processing hole flows from the inlet to the outlet.

8. The independently controllable punch mechanism of the press according to claim 1, characterized in that, The ventilation seat includes: A seat body is provided with a slot opening in the length direction, and the two ends of the slot opening are provided with ports respectively; A bottom cover is fixedly installed on the seat body, and the slot opening is not closed, so that the slot opening defines the chamber, the ports define the openings of the chamber, and the punch pins are slidably connected to the bottom cover.

9. The independently controllable punch mechanism of the press according to claim 8, characterized in that, An elastic body is further provided on the ventilation seat, and the elastic body is fixedly installed on the bottom cover and is elastically deformed when it is in contact with leather, and the elastic body is provided with hole positions for the second end of the punch pin to extend or retract.

10. The independently controllable punch mechanism of the press according to claim 8, characterized in that, The bottom cover includes A bottom plate is fixedly arranged on the seat body and seals the opening of the slot, and a through hole for the punch pin to pass through is formed on the bottom plate, and the bottom cover further comprises A positioning plate is fixedly arranged on the bottom plate, and a positioning groove corresponding to the through hole is arranged on the positioning plate, and a positioning hole coaxial with the through hole for the punch pin to pass through is arranged in the positioning groove. The punch pin comprises a pin body, and a convex ring is formed on the pin body, the convex ring is movably connected in the positioning groove, and the elastic member is arranged between the convex ring and the bottom of the positioning groove to provide an elastic pushing force towards the chamber.

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