Punching machine tool capable of rapidly replacing die

Abstract

The invention relates to the technical field of punching machine tools, in particular to a punching machine tool capable of quickly replacing a die, which comprises a punching machine, clamping seats are arranged on a table top of the punching machine, the two clamping seats are connected with a first clamp and a second clamp, the punching machine is provided with a mounting cavity, the mounting cavity is connected with a double-end screw rod, a sliding block is provided with an L-shaped push rod, and a locking assembly is arranged in an inner cavity of each clamping seat. When a die of a punching machine is replaced, two sliding blocks and an L-shaped push rod can be synchronously driven to slide by rotating a double-end lead screw, so that a clamping seat and a first clamp are firstly pushed to clamp and fix the two side edges of the die, and the first clamp can unlock a locking assembly after clamping; the L-shaped push rod and the clamping base can slide relatively, the L-shaped push rod can drive the second clamp to clamp and fix the other two side walls of the mold in the continuous sliding process, in this way, clamping and fixing of the mold are completed, the whole mold dismounting and mounting process can be achieved only by rotating the double-end lead screw, and the dismounting and mounting process is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping machines, and specifically relates to a stamping machine capable of quickly replacing molds. Background Art

[0002] The stamping production of a punching press is mainly for sheet metal. That is, through molds, blanking, punching, forming, drawing, trimming, fine blanking, shaping, riveting, and extrusion parts, etc. can be made, and it is widely used in various fields. However, the replacement of the stamping molds of common punching presses is relatively troublesome. When processing multiple different parts, the stamping molds need to be replaced multiple times, which will slow down the production speed and thus lead to a decrease in production efficiency. Therefore, the present invention has developed a stamping machine capable of quickly replacing molds to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a stamping machine capable of quickly replacing molds to solve the above technical problems.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows: A stamping machine capable of quickly replacing molds includes a punching press. On the top of the table surface of the punching press, two internally hollow clamping seats are symmetrically and slidably connected on opposite sides. On one side surface of the two clamping seats close to each other, a first fixture is slidably connected. On opposite sides of the clamping seat, a second fixture is symmetrically and slidably connected. An installation cavity is opened in the inner cavity of the table surface of the punching press. A double-headed lead screw is rotatably connected between the inner walls of the installation cavity, and sliders are symmetrically threadedly connected to the outer walls of both ends of the double-headed lead screw. An L-shaped push rod is installed on the top of the slider. One end of each of the two L-shaped push rods close to each other is inserted into the two clamping seats respectively. A locking component for locking the L-shaped push rod is arranged in the inner cavity of the clamping seat. After the first fixture clamps the mold, the locking component is separated from the L-shaped push rod, so that the L-shaped push rod and the clamping seat slide relative to each other and drive the second fixture to clamp and fix the mold.

[0005] Preferably, the locking component includes two rotating shafts rotatably connected to the bottom of the inner cavity of the clamping seat. A limit gear is fixedly connected to the outer wall of the rotating shaft, and the two limit gears are located on both sides of the L-shaped push rod. Limit racks that cooperate with the limit gears are symmetrically arranged on opposite side walls of the L-shaped push rod. A chuck that is engaged with the two limit gears is slidably connected between opposite side walls of the inner cavity of the clamping seat, and the chuck is arranged on the side away from the first fixture. When the first fixture clamps the mold, the first fixture pushes the chuck to separate from the limit gear. A spring is arranged between the side surface of the chuck away from the limit gear and the inner wall of the clamping seat.

[0006] Preferably, the first fixture includes a first clamping plate. Two sliding rods are fixedly connected to one side surface of the first clamping plate, and one end of the sliding rod is inserted into the inner cavity of the clamping seat.

[0007] Preferably, a plurality of rollers are rotatably connected to a side surface of the first clamping plate away from the clamping seat.

[0008] Preferably, the second fixture includes a first connecting rod hinged to a side wall of the end portion of the L-shaped push rod. One end of the first connecting rod away from the L-shaped push rod is hinged to a second connecting rod. One end of the second connecting rod passes through the side wall of the clamping seat and is connected to a second clamping plate.

[0009] Preferably, a third fixture is slidably connected to the top of the clamping seat. After the L-shaped push rod pushes the second clamping plate to clamp the mold from both sides, it then pushes the third fixture to clamp the mold from the top.

[0010] Preferably, the third fixture includes two screw rods rotatably connected to the bottom of the inner cavity of the clamping seat, and the two screw rods are located on opposite sides of the L-shaped push rod. A threaded sleeve is threadedly connected to the outer wall of the screw rod. The top of the threaded sleeve passes through the clamping seat and is provided with a third clamping plate. A driving gear is fixedly connected to the outer wall of the screw rod.

[0011] Preferably, a rotating gear is rotatably connected to the end portion of the L-shaped push rod. A first rack and a second rack are respectively meshed with the bottom and the top of the rotating gear. The two first connecting rods are respectively hinged to opposite side walls of the first rack. Third racks that cooperate with the driving gear are symmetrically arranged on opposite side walls of the second rack.

[0012] Preferably, slide rails that cooperate with the first rack and the second rack are respectively arranged at the bottom and the top of the inner cavity of the clamping seat.

[0013] Preferably, one end of the double-headed lead screw passes through the side wall of the punching press and is slidably connected to a rotating handwheel. A limiting groove is arranged on the inner wall of the rotating handwheel. A limiting key is arranged on the outer wall of the double-headed lead screw. A limiting hole that cooperates with the rotating handwheel is formed in the side wall of the punching press. The inner wall of the limiting hole and the outer wall of the rotating handwheel are both subjected to frosted treatment.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When replacing the mold of the punching press in the present invention, the two sliders and the L-shaped push rod can be synchronously driven to slide by rotating the double-headed lead screw, so as to first push the clamping seat and the first fixture to clamp and fix the two side edges of the mold. And after clamping, the first fixture can unlock the locking component, so that relative sliding can occur between the L-shaped push rod and the clamping seat, so that the second fixture can be driven to clamp and fix the other two side walls of the mold during the continuous sliding of the L-shaped push rod. In this way, the clamping and fixing of the mold is completed. The whole process of disassembling and assembling the mold can be achieved only by rotating the double-headed lead screw. The disassembly and assembly process is simple and convenient, and the installation position of the mold can be quickly positioned through the cooperation of the first fixture and the second fixture. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of the stamping machine tool of the present invention; Figure 2 Front sectional structural schematic diagram of the stamping machine tool of the present invention; Figure 3 Structural schematic diagram of the clamping seat and its connecting components in the stamping machine tool of the present invention; Figure 4 is Figure 3 front sectional structural schematic diagram; Figure 5 is Figure 3 top sectional structural schematic diagram; Figure 6 Structural schematic diagram of the L-shaped push rod and its connecting components in the stamping machine tool of the present invention.

[0017] In the drawings, the list of components represented by each reference numeral is as follows: 1. Punch press; 2. Clamping seat; 3. First fixture; 31. First clamping plate; 32. Slide bar; 33. Roller; 4. Second fixture; 41. First connecting rod; 42. Second connecting rod; 43. Second clamping plate; 5. Installation cavity; 6. Double-headed screw rod; 7. Slide block; 8. L-shaped push rod; 9. Locking assembly; 91. Rotating shaft; 92. Limiting gear; 93. Limiting rack; 94. Chuck; 95. Spring; 10. Third fixture; 101. Screw rod; 102. Threaded sleeve; 103. Third clamping plate; 104. Driving gear; 11. Rotating gear; 12. First rack; 13. Second rack; 14. Third rack; 15. Slide rail; 16. Rotating handwheel; 17. Limiting hole. Detailed implementation manners

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] As Figures 1-6 shown: One embodiment of the present invention is: As Figures 1-2As shown in the figure: A stamping machine tool with a quickly replaceable mold, including a punching press 1. On the top of the table surface of the punching press 1, two internally hollow clamping seats 2 are symmetrically and slidably connected to the opposite sides. On one side surface of the two clamping seats 2 close to each other, a first fixture 3 is slidably connected. On the opposite sides of the clamping seats 2, second fixtures 4 are symmetrically and slidably connected. An installation cavity 5 is opened in the inner cavity of the table surface of the punching press 1. A double-headed lead screw 6 is rotatably connected between the inner walls of the installation cavity 5. On the outer walls of both ends of the double-headed lead screw 6, sliders 7 are symmetrically and threadedly connected. An L-shaped push rod 8 is installed on the top of the slider 7. A limiting block that abuts against the clamping seat 2 is arranged on the outer wall of the L-shaped push rod 8. One end of each of the two L-shaped push rods 8 close to each other is respectively inserted into the two clamping seats 2. A locking component 9 for locking the L-shaped push rod 8 is arranged in the inner cavity of the clamping seat 2. After the first fixture 3 clamps the mold, the locking component 9 is separated from the L-shaped push rod 8, so that the L-shaped push rod 8 and the clamping seat 2 slide relative to each other and drive the second fixture 4 to clamp and fix the mold.

[0020] As Figure 5 shown: In this embodiment, the locking component 9 includes two rotating shafts 91 rotatably connected to the bottom of the inner cavity of the clamping seat 2. A limiting gear 92 is fixedly connected to the outer wall of the rotating shaft 91. And the two limiting gears 92 are located on both sides of the L-shaped push rod 8. Limiting racks 93 that cooperate with the limiting gears 92 are symmetrically arranged on the opposite side walls of the L-shaped push rod 8. A chuck 94 that is engaged with the two limiting gears 92 is slidably connected between the opposite side walls of the inner cavity of the clamping seat 2. And the chuck 94 is arranged on the side far from the first fixture 3. When the first fixture 3 clamps the mold, the first fixture 3 pushes the chuck 94 to separate from the limiting gear 92. A spring 95 is arranged between the side surface of the chuck 94 far from the limiting gear 92 and the inner wall of the clamping seat 2. The first fixture 3 includes a first clamping plate 31. Two sliding rods 32 are fixedly connected to one side surface of the first clamping plate 31. And one end of the sliding rod 32 is inserted into the inner cavity of the clamping seat 2. When the first clamping plate 31 clamps and fixes the mold, it will drive the sliding rod 32 to slide. The sliding rod 32 pushes the chuck 94 to slide and separate from the limiting gear 92, so that the limiting gear 92 can rotate, enabling the limiting rack 93 and the limiting gear 92 to slide relative to each other, thereby realizing the relative sliding between the L-shaped push plate and the clamping seat.

[0021] As Figure 3 shown: In this embodiment, in order to reduce the resistance received by the second clamping plate 43 during the process of clamping the mold, several rollers 33 are rotatably connected to the side surface of the first clamping plate 31 far from the clamping seat 2. During the clamping process of the second fixture 4, the mold can reduce the frictional resistance with the first clamping plate 31 through the rolling of the rollers 33, thereby reducing the resistance.

[0022] As Figures 5-6As shown: In this embodiment, the second fixture 4 includes a first connecting rod 41 hinged to the side wall of the end of the L-shaped push rod 8. One end of the first connecting rod 41 away from the L-shaped push rod 8 is hinged with a second connecting rod 42. One end of the second connecting rod 42 passes through the side wall of the clamping seat 2 and is connected with a second clamping plate 43.

[0023] As Figure 3 and 6 shown: In this embodiment, in order to limit the displacement of the mold in the height direction, a third fixture 10 is slidably connected to the top of the clamping seat 2. After the L-shaped push rod 8 pushes the second clamping plate 43 to clamp the mold from both sides, it then pushes the third fixture 10 to clamp the mold from the top. The third fixture 10 includes two screw rods 101 rotatably connected to the bottom of the inner cavity of the clamping seat 2, and the two screw rods 101 are located on opposite sides of the L-shaped push rod 8. A threaded sleeve 102 is threadedly connected to the outer wall of the screw rod 101. The top of the threaded sleeve 102 passes through the clamping seat 2 and is provided with a third clamping plate 103. A driving gear 104 is fixedly connected to the outer wall of the screw rod 101. By rotating the screw rod 101, the threaded sleeve 102 and the third clamping plate 103 are driven to move up and down, so as to realize clamping and fixing of the mold in the height direction, and further ensure the stability of the mold installation.

[0024] As Figure 6 shown: In this embodiment, a rotating gear 11 is rotatably connected to the end of the L-shaped push rod 8. A first rack 12 and a second rack 13 are respectively meshed with the bottom and top of the rotating gear 11. The two first connecting rods 41 are respectively hinged to the opposite side walls of the first rack 12. Third racks 14 that cooperate with the driving gear 104 are symmetrically arranged on the opposite side walls of the second rack 13. Slide rails 15 that cooperate with the first rack 12 and the second rack 13 are respectively arranged at the bottom and top of the inner cavity of the clamping seat 2. During the relative sliding of the L-shaped push rod 8 and the clamping seat 2, the first rack 12 and the second rack 13 are synchronously driven to slide through the rotating gear 11. The sliding of the first rack 12 drives the two first connecting rods 41 on both sides to slide. And because the first connecting rod 41 and the second connecting rod 42 are hinged, the second connecting rod 42 and the second clamping plate 43 are driven to slide and clamp the mold. After the mold is clamped, since the position of the second clamping plate 43 is fixed, the first rack 12 will no longer slide. At this time, as the L-shaped push rod 8 continues to slide, it will drive the rotating gear 11 to rotate under the meshing action of the first rack 12, which will drive the second rack 13 to continue to slide, so that the third rack 14 meshes with the driving gear 104, thereby driving the two screw rods 101 to rotate, driving the threaded sleeve 102 and the third clamping plate 103 to descend to clamp and fix the mold.

[0025] As Figure 1As shown: In this embodiment, to facilitate clamping of the mold and prevent the handwheel 16 from rotating due to vibration force during clamping, one end of the double-headed lead screw 6 passes through the side wall of the punching machine 1 and is slidably connected to the rotating handwheel 16. The inner wall of the rotating handwheel 16 is provided with a limiting groove, the outer wall of the double-headed lead screw 6 is provided with a limiting key, and the side wall of the punching machine 1 is provided with a limiting hole 17 that cooperates with the rotating handwheel 16. The inner wall of the limiting hole 17 and the outer wall of the rotating handwheel 16 are both subjected to frosted treatment. During clamping, the rotating handwheel 16 can be pulled out of the limiting hole 17, and then the handwheel 16 is rotated to drive the double-headed lead screw 6 to rotate to clamp the mold. After clamping and fixing, the rotating handwheel 16 is pushed back into the limiting hole 17 so that the outer wall of the rotating handwheel 16 abuts against the inner wall of the limiting hole 17 for limiting, thereby preventing the handwheel from rotating.

[0026] The specific working process of this embodiment is as follows: When the mold needs to be installed, the mold is placed between the two clamping seats 2, and then the rotating handwheel 16 is pulled out of the limiting hole 17 and the rotating handwheel 16 is rotated. The rotating handwheel 16 drives the double-headed lead screw 6 to rotate, thereby driving the two L-shaped push rods 8 to slide closer to each other. Since the L-shaped push rods 8 and the clamping seats 2 can drive the two clamping seats 2 to slide closer to each other synchronously through the mutual engagement of the limiting rack 93, the limiting gear 92, and the chuck 94, the two first clamping plates 31 clamp the mold from opposite sides. During the clamping process, the first clamping plate 31 pushes the sliding rod 32 to slide until the first clamping plate 31 abuts against the side surface of the clamping seat 2, completing the clamping of the first clamping plate 31. And when the sliding rod 32 is about to abut, it contacts the chuck 94 and pushes the chuck 94 to slide out of contact with the limiting gear 92, so that the limiting gear 92 can rotate.

[0027] Then continue to rotate the double-headed lead screw 6 to continue driving the L-shaped push rod 8 to slide. Since the limiting gear 92 can rotate, relative sliding can occur between the L-shaped push rod 8, the first rack 12, the second rack 13 and the clamping seat 2. During the sliding process of the first rack 12, the second connecting rod 42 and the second clamping plate 43 are pulled closer to each other by the first connecting rod 41, so as to clamp and fix the other two side walls of the mold through the second clamping plate 43. And during the clamping and fixing process, rolling friction can be generated between the mold and the first clamping plate 31 through the roller 33, reducing the generation of resistance.

[0028] After the second clamping plate 43 completes clamping the mold, the position of the first rack 12 is fixed and remains motionless, and continued rotation of the double-headed screw 6 will drive the L-shaped push rod 8 and the rotating gear 11 to continue to slide and slide relative to the first rack 12, so that the rotating gear 11 can rotate, and then the rotating gear 11 can drive the second rack 13 to slide (slide relative to the first rack 12), and the third racks 14 on both sides of the second rack 13 are engaged with the driving gear 104, thereby driving the screw 101 to rotate, driving the threaded sleeve 102 and the third clamping plate 103 to descend to limit the height direction of the mold, thereby completing the clamping and fixing of the mold, and finally pushing the rotating hand wheel 16 back into the limiting hole 17 to limit the rotating hand wheel 16 and the double-headed screw 6.

[0029] When the mold is disassembled, the double-headed screw 6 is rotated in the opposite direction, driving the L-shaped push rod 8 to slide in the opposite direction, and the first rack 12 and the second rack 13 are driven to slide in the opposite direction by rotating the gear 11, thereby driving the third clamping plate 103 and the second clamping plate 43 to release the mold. After the second clamping plate 43 returns to its original position, the first rack 12 and the second rack 13 slide relative to each other, so that the second rack 13 returns to its original position, and then the limit block on the outer wall of the L-shaped push rod 8 abuts against the clamping seat 2, thereby pulling the clamping seat 2 to slide, so that the first clamping plate 31 is out of contact with the mold, completing the unlocking of the mold, and after the first clamping plate 31 is out of contact with the mold, the chuck 94 returns to its original position under the action of the restoring force of the spring 95 and re-engages with the limit gear 92, and then the mold can be removed.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stamping machine tool with a quickly replaceable die, comprising a punching press (1), characterized in that: On the top of the table of the punching machine (1), two internally hollow clamping seats (2) are symmetrically and slidably connected to opposite sides. On one side of the two clamping seats (2) close to each other, a first fixture (3) is slidably connected. On opposite sides of the clamping seat (2), a second fixture (4) is symmetrically and slidably connected. An installation cavity (5) is provided in the inner cavity of the table of the punching machine (1). A double-headed lead screw (6) is rotatably connected between the inner walls of the installation cavity (5). On the outer walls of both ends of the double-headed lead screw (6), sliders (7) are symmetrically threadedly connected. An L-shaped push rod (8) is installed on the top of the slider (7). One end of each of the two L-shaped push rods (8) close to each other is inserted into the two clamping seats (2) respectively. A locking component (9) for locking the L-shaped push rod (8) is provided in the inner cavity of the clamping seat (2). After the first fixture (3) clamps the mold, the locking component (9) is separated from the L-shaped push rod (8), so that the L-shaped push rod (8) slides relative to the clamping seat (2) and drives the second fixture (4) to clamp and fix the mold.

2. The stamping machine capable of quickly replacing a mold according to claim 1, wherein: The locking component (9) includes two rotating shafts (91) rotatably connected to the bottom of the inner cavity of the clamping seat (2). A limit gear (92) is fixedly connected to the outer wall of the rotating shaft (91). The two limit gears (92) are located on both sides of the L-shaped push rod (8). Limit racks (93) that cooperate with the limit gears (92) are symmetrically arranged on opposite side walls of the L-shaped push rod (8). A chuck (94) that is engaged with the two limit gears (92) is slidably connected between opposite side walls of the inner cavity of the clamping seat (2). The chuck (94) is arranged on the side away from the first fixture (3). When the first fixture (3) clamps the mold, the first fixture (3) pushes the chuck (94) to separate from the limit gear (92). A spring (95) is provided between one side surface of the chuck (94) away from the limit gear (92) and the inner wall of the clamping seat (2).

3. The stamping machine capable of quickly replacing a mold according to claim 2, wherein: The first fixture (3) includes a first clamping plate (31). Two sliding rods (32) are fixedly connected to one side surface of the first clamping plate (31). One end of the sliding rod (32) is inserted into the inner cavity of the clamping seat (2).

4. A stamping machine capable of quickly replacing a mold according to claim 3, characterized in that: A plurality of rollers (33) are rotatably connected to one side surface of the first clamping plate (31) away from the clamping seat (2).

5. A stamping machine capable of quickly replacing a mold according to claim 1, characterized in that: The second fixture (4) includes a first connecting rod (41) hinged to the side wall of the end of the L-shaped push rod (8). One end of the first connecting rod (41) away from the L-shaped push rod (8) is hinged to a second connecting rod (42). One end of the second connecting rod (42) passes through the side wall of the clamping seat (2) and is connected to a second clamping plate (43).

6. The stamping machine capable of quickly replacing the mold according to claim 5, wherein: A third fixture (10) is slidably connected to the top of the clamping seat (2). After the L-shaped push rod (8) pushes the second clamping plate (43) to clamp the mold from both sides, it then pushes the third fixture (10) to clamp the mold from the top.

7. The stamping machine capable of quickly replacing a mold according to claim 6, wherein: The third fixture (10) includes two screw rods (101) rotatably connected to the bottom of the inner cavity of the clamping seat (2), and the two screw rods (101) are located on opposite sides of the L-shaped push rod (8). A thread sleeve (102) is threadedly connected to the outer wall of the screw rod (101). The top of the thread sleeve (102) penetrates through the clamping seat (2) and is provided with a third clamping plate (103). A driving gear (104) is fixedly connected to the outer wall of the screw rod (101).

8. A stamping machine capable of quickly replacing a mold according to claim 7, characterized in that: A rotating gear (11) is rotatably connected to the end of the L-shaped push rod (8). A first rack (12) and a second rack (13) are respectively meshed with the bottom and the top of the rotating gear (11). Two first connecting rods (41) are respectively hinged to opposite side walls of the first rack (12). Third racks (14) that cooperate with the driving gear (104) are symmetrically arranged on opposite side walls of the second rack (13).

9. The stamping machine capable of quickly replacing a mold according to claim 8, wherein: Sliding rails (15) that cooperate with the first rack (12) and the second rack (13) are respectively arranged at the bottom and the top of the inner cavity of the clamping seat (2).

10. A stamping machine capable of quickly replacing a mold according to claim 1, characterized in that: One end of the double-headed screw rod (6) penetrates through the side wall of the punching machine (1) and is slidably connected to a rotating handwheel (16). A limiting groove is provided on the inner wall of the rotating handwheel (16). A limiting key is provided on the outer wall of the double-headed screw rod (6). A limiting hole (17) that cooperates with the rotating handwheel (16) is formed in the side wall of the punching machine (1). The inner wall of the limiting hole (17) and the outer wall of the rotating handwheel (16) are both subjected to frosted treatment.

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