Multi-pressure-head device of sheet material edge sealing machine

Abstract

The utility model relates to the technical field of label processing equipment, and discloses a multi-pressure head device of a sheet stock edge sealing machine, which is characterized in that a first pressure head component comprises a first pressure head capable of moving along an X axis, a Y axis and a Z axis; the second pressing head assembly comprises a lower Y-axis base plate capable of moving along the X axis and the Y axis, a lower pressing head assembly is arranged at the end of the lower Y-axis base plate and comprises a second pressing head capable of ascending and descending, and the second pressing head rotates through a driving part. According to the utility model, two groups of pressure heads are arranged, when one group of pressure heads is used for pressing a label for hemming and sewing, the other group of pressure heads can transfer the label to a position to be processed, after the hemming of the current pressure head is completed, the processed label is transferred to a discharge port, and at the moment, the pressure head at the position to be processed transfers the label to an overlock sewing machine for hemming processing; and the front pressure head and the material taking station alternately work, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of label processing equipment, in particular to a pressure head device in a sheet material edge sealing machine for edge sealing labels. Background Art

[0002] During the processing of labels, the edges of the labels need to be sewn and hemmed. At this time, a close-edge machine will be used. The close-edge machine includes an edge-sealing machine for edge sealing and a pressure head for pressing the label to move at the edge-sealing part of the edge-sealing machine. The pressure head is driven by a servo to move along the X, Y and Z axes.

[0003] The existing edge sewing machine is only equipped with one set of pressing heads. When the material picking suction cup transfers the label to the operating table, the pressing head moves to the label through the servo module, presses the label on the operating table, drives the label to move on the operating table, and moves to the overlocking machine for sewing and hemming. While hemming, the pressing head needs to drive the label to rotate, so the pressing head also needs to have a rotating motion.

[0004] The existing edge sealing machine uses a single pressure head, and the pressure head has a long displacement distance. The label needs to be pressed and moved from the visual camera shooting position to the edge sealing position first. After the edge sealing is completed, the label is transferred to the discharge port for discharge. The stroke of a single pressure head is long, and the working efficiency of the edge sealing machine needs to be improved. Utility Model Content

[0005] Based on this, it is necessary to provide a multi-pressing head device for a sheet material sealing machine to address the problem of low working efficiency of a single press head of an existing sealing machine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-pressing head device of a sheet material close-edging machine, comprising at least two sets of press head assemblies capable of displacement in the X-axis, Y-axis and Z-axis, wherein the press head assemblies comprise a first press head assembly and a second press head assembly, and the first press head assembly and the second press head assembly are movably mounted on the upper end and the lower end of a fixed base plate, respectively, and are movable back and forth along the X-axis direction;

[0007] The first pressing head assembly includes a first pressing head movable along the X-axis, the Y-axis, and the Z-axis;

[0008] The second press head assembly includes a lower Y-axis substrate movable along the X-axis and Y-axis, a lower press head assembly is provided at the end of the lower Y-axis substrate, the lower press head assembly includes a second press head that can be raised and lowered, and the second press head is rotated by a driving member, the driving member includes a second press head rotating motor fixedly mounted on the lower Y-axis substrate away from the end of the lower press head assembly, the output end of the second press head rotating motor is connected to a first pulley, the upper end of the second press head is connected to a second pulley, the second pulley is connected to the first pulley through a transmission belt transmission connection, and the second pulley is driven to rotate when the second pulley rotates.

[0009] By setting up double pressure heads, the labels can be pressed and displaced alternately to improve work efficiency.

[0010] By reducing the height of the pressure head assembly at the lower end and making its structure compact, the height of the Z-axis operating arm of the upper pressure head can be shortened to prevent excessive weight from causing excessive load on the rear end.

[0011] In a preferred example, the utility model can be further configured as follows: the upper and lower ends of the fixed base plate are respectively provided with a track and a rack arranged along the X-axis;

[0012] The first pressing head assembly also includes an upper X-axis base slidably mounted above the fixed base plate by a track, an upper X-axis motor is provided on the upper X-axis base, a gear is provided at the output end of the upper X-axis motor, and the gear is meshed with the rack above the fixed base plate, an upper Y-axis base is slidably mounted on the upper end of the upper X-axis base by a track, a rack arranged along the Y-axis direction is provided at the bottom of the upper Y-axis base, an upper Y-axis motor is provided at the upper end of the upper X-axis base, a gear is provided at the output end of the upper Y-axis motor, and the gear is meshed with the rack at the bottom of the upper Y-axis base, and the first pressing head can be raised and lowered and arranged at the end of the upper Y-axis base.

[0013] The second pressure head assembly also includes a lower X-axis base slidably installed below the fixed base plate through a track, a lower X-axis motor is provided at the lower end of the lower X-axis base, a gear meshed with the rack at the lower end of the fixed base plate is provided at the output end of the lower X-axis motor, the bottom of the lower X-axis base is slidably connected with the lower Y-axis base plate through a track, a rack arranged along the Y-axis direction is provided at the upper end of the lower Y-axis base plate, a lower Y-axis motor is provided on the lower X-axis base, and a gear meshed with the rack at the upper end of the lower Y-axis base plate is provided at the output end of the lower Y-axis motor.

[0014] By adopting the above technical solution, the motor and the rack are used in combination, and the displacement of the press head on the X-axis, Y-axis and Z-axis can be completed without a servo module, thereby saving costs.

[0015] In a preferred example, the utility model can be further configured as follows: the first pressure head assembly also includes an upper Z-axis base fixed to the end of the upper Y-axis substrate, the upper Z-axis base is vertical, and the end surface of the upper Z-axis base is slidably mounted with a first pressure head rotating motor through a track, and the first pressure head rotating motor performs a lifting action through an upper Z-axis cylinder, the first pressure head is elastically mounted on the output end at the bottom of the first pressure head rotating motor, and the first pressure head rotating motor drives the first pressure head to rotate.

[0016] By adopting the above technical solution, the upper pressure head can be displaced in the X-axis, Y-axis and Z-axis, and can be rotatably set.

[0017] In a preferred example, the utility model can be further configured as follows: the lower pressure head assembly also includes an assembly bracket fixed to the end of the lower Y-axis substrate, the second pulley is rotatably installed on the end of the assembly bracket, a downward pressure cylinder is fixedly provided at the bottom of the assembly bracket, the output end of the downward pressure cylinder is downwardly connected to a lifting frame, the end of the lifting frame is rotatably connected to a second hollow shaft, the second hollow shaft is driven to rotate by the rotation of the second pulley, the bottom of the second hollow shaft is elastically connected to the second pressure head, and the second hollow shaft drives the second pressure head to rotate when it rotates.

[0018] By adopting the above technical solution, the height structure of the lower pressure head is compressed without affecting its X-axis displacement, Y-axis displacement, Z-axis displacement and rotation.

[0019] In a preferred example, the utility model can be further configured as follows: an upper bearing seat and a bearing assembly are fixedly provided at the end of the component bracket, a first hollow shaft is rotatably installed in the upper bearing seat and the bearing assembly through a bearing, the second pulley is fixedly installed on the outer wall of the first hollow shaft, the second pulley drives the first hollow shaft to rotate when it rotates, the top of the second hollow shaft is inserted and connected from the bottom of the first hollow shaft, a first pin groove is opened on the side wall of the first hollow shaft along its length direction, a first fixing pin is fixedly provided on the outer wall of the second hollow shaft, the first fixing pin is movably installed in the first pin groove, so as to realize the upper and lower limit movement of the second hollow shaft along the inner cavity of the first hollow shaft.

[0020] A lower bearing seat and a bearing assembly are fixedly provided at the end of the lifting frame, the second hollow shaft passes through the lower bearing seat and the central bearing of the bearing assembly and is fixedly connected to the bearing, a telescopic rod is fixedly provided at the upper end of the second pressure head, the top end of the telescopic rod is inserted and connected from the bottom of the second hollow shaft, a third fixing pin is fixedly provided on the outer wall of the telescopic rod, a second pin groove is opened on the outer wall of the second hollow shaft along its length direction, the third fixing pin is movably installed in the second pin groove to realize the upper and lower limit movement of the telescopic rod along the inner cavity of the second hollow shaft.

[0021] By adopting the above technical solution, when the second pressure head at the bottom drives the first pulley to rotate by the second pressure head rotating motor, the second pulley can be driven to rotate, and the height position of the second pulley remains unchanged. The rotation of the second pulley can drive the second hollow shaft to rotate, and the downward pressure cylinder can drive the second hollow shaft to move up and down without affecting the position change of the first hollow shaft and the second pulley.

[0022] In a preferred example, the utility model can be further configured as follows: a spring sleeved on the outside of the telescopic rod is provided between the bottom of the second hollow shaft and the second pressure head.

[0023] By adopting the above technical solution, the pressing head has elasticity, and under the premise of elasticity, the rotation of the pressing head will not be affected, and the operating table will not be damaged when the label is crimped.

[0024] In a preferred example, the utility model can be further configured as follows: a limit top plate is fixedly provided on the top of the first hollow shaft through the upper bearing seat and the bearing assembly, a limit frame is fixedly provided on the end of the assembly bracket, the limit top plate is clamped on the limit frame, and the limit frame limits the limit top plate up and down.

[0025] By adopting the above technical solution, the first hollow shaft and the second pulley are height-limited, thereby preventing the downward pressure cylinder from causing upward and downward displacement when driving the pressure head to rise and fall.

[0026] In summary, the utility model includes at least one of the following beneficial technical effects:

[0027] The utility model is provided with two groups of pressing heads. When one group of pressing heads is pressing the label for edge sewing, the other group of pressing heads can transfer the label to the position to be processed. After the front pressing head completes the edge sewing, the processed label is transferred to the discharge port. At this time, the pressing head at the position to be processed transfers the label to the overlocking machine for edge sewing, and the front pressing head returns to the material taking position to transfer the label to the position to be processed. The two groups work alternately to improve work efficiency.

[0028] The utility model is located at the lower end of the pressure head structure, and the motor used to drive the pressure head to rotate is installed at the rear end of the lower Y-axis base plate, and the transmission belt and the pulley are used to drive the pressure head to rotate, thereby shortening the height of the pressure head assembly, thereby shortening the height of the upper pressure head for the Z-axis displacement structure, preventing its excessive weight from causing excessive load on the rear end, and preventing irreversible damage to the equipment.

[0029] The utility model has a compact structure and a high degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is a three-dimensional diagram of the utility model;

[0032] Figure 2 It is a side view of the utility model;

[0033] Figure 3 This is a bottom-up perspective view of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the lower pressure head assembly of the utility model;

[0035] Figure 5 This is a disassembled diagram of the lower pressure head assembly in the utility model.

[0036] In the attached figure:

[0037] 1. Fixed base plate; 11. Track; 12. Rack;

[0038] 2. First press head assembly; 21. Upper X-axis base; 22. Upper X-axis motor; 23. First press head; 24. First press head rotation motor; 25. Upper Z-axis base; 26. Upper Z-axis cylinder; 27. Upper Y-axis substrate; 28. Upper Y-axis motor;

[0039] 3. Second pressure head assembly; 31. Lower X-axis base; 32. Lower X-axis motor; 33. Lower Y-axis substrate; 34. Lower Y-axis motor; 35. Second pressure head rotating motor; 351. First pulley; 36. Lower pressure head assembly; 361. Assembly bracket; 362. Upper bearing seat and bearing assembly; 363. Lower pressure cylinder; 364. Lifting frame; 365. Lower bearing seat and bearing assembly; 366. Limiting frame; 367. Limiting top plate; 368. First hollow shaft; 369. Second pulley; 3610. Second pressure head; 3611. Spring; 3612. First fixing pin; 3613. Second hollow shaft; 3614. Second pin groove; 3615. Telescopic rod; 3616. Third fixing pin; 3617. First pin groove. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] exist Figure 1-5 In the illustrated embodiment, the utility model provides a technical solution: a multi-pressing head device of a sheet material sealing machine, comprising at least two groups of press head assemblies capable of displacement in the X-axis, Y-axis and Z-axis, the press head assembly comprising a first press head assembly 2 and a second press head assembly 3, and the first press head assembly 2 and the second press head assembly 3 are movably mounted on the upper and lower ends of a fixed base plate 1, respectively, and move back and forth along the X-axis direction, and the upper and lower ends of the fixed base plate 1 are respectively provided with a track 11 and a rack 12 arranged along the X-axis.

[0042] The first pressing head assembly 2: comprises a first pressing head 23 movable along the X-axis, the Y-axis and the Z-axis, and is slidably mounted on an upper X-axis base 21 above the fixed substrate 1 through a track 11, an upper X-axis motor 22 is provided on the upper X-axis base 21, a gear is provided at the output end of the upper X-axis motor 22, and the gear is meshed with the rack 12 above the fixed substrate 1, an upper Y-axis substrate 27 is slidably mounted on the upper end of the upper X-axis base 21 through a track, a rack arranged along the Y-axis direction is provided at the bottom of the upper Y-axis substrate 27, an upper Y-axis motor 28 is provided at the upper end of the upper X-axis base 21, a gear is provided at the output end of the upper Y-axis motor 28, and the gear is meshed with the rack at the bottom of the upper Y-axis substrate 27, and the first pressing head 23 can be raised and lowered and arranged at the end of the upper Y-axis substrate 27. Among them, the upper Z-axis base 25 is fixed on the end of the upper Y-axis substrate 27, and the upper Z-axis base 25 is vertical. The end surface of the upper Z-axis base 25 is slidably installed with the first pressure head rotating motor 24 through a track, and the first pressure head rotating motor 24 performs lifting and lowering actions through the upper Z-axis cylinder 26. The first pressure head 23 is elastically installed at the output end at the bottom of the first pressure head rotating motor 24, and the first pressure head rotating motor 24 drives the first pressure head 23 to rotate. A spring is provided at the upper end of 23. The elastic installation here is the same as the structure of the second pressure head 36 described later, and it has elasticity without affecting its rotation effect.

[0043] The second pressing head assembly 3 includes a lower Y-axis substrate 33 movable along the X-axis and the Y-axis, a lower X-axis base 31 slidably mounted below the fixed substrate 1 through a track 11 , and an assembly bracket 361 at the end of the lower Y-axis substrate 33 .

[0044] A lower X-axis motor 32 is provided at the lower end of the lower X-axis base 31, and a gear meshing with the rack at the lower end of the fixed substrate 1 is provided at the output end of the lower X-axis motor 32. The bottom of the lower X-axis base 31 is slidably connected with the lower Y-axis substrate 33 through a track, and a rack arranged along the Y-axis direction is provided at the upper end of the lower Y-axis substrate 33. A lower Y-axis motor 34 is provided on the lower X-axis base 31, and a gear meshing with the rack at the upper end of the lower Y-axis substrate 33 is provided at the output end of the lower Y-axis motor 34.

[0045] The second pulley 369 is rotatably mounted on the end of the component bracket 361, and a downward pressure cylinder 363 is fixedly provided at the bottom of the component bracket 361. The output end of the downward pressure cylinder 363 is downwardly connected to a lifting frame 364, and the end of the lifting frame 364 is rotatably connected to a second hollow shaft 3613. The second hollow shaft 3613 is driven to rotate by the rotation of the second pulley 369. The bottom of the second hollow shaft 3613 is elastically connected to the second pressure head 3610, and the second hollow shaft 3610 is driven to rotate when the second hollow shaft 3613 rotates.

[0046] A lower pressure head assembly 36 is provided at the end of the lower Y-axis substrate 33, wherein the lower pressure head assembly 36 includes: a second pressure head 3610 that can be raised and lowered, and the second pressure head 3610 is rotated by a driving member, the driving member includes a second pressure head rotating motor 35 fixedly mounted on the lower Y-axis substrate 33 away from the end of the lower pressure head assembly 36, the output end of the second pressure head rotating motor 35 is connected to a first pulley 351, the upper end of the second pressure head 3610 is connected to a second pulley 369, the second pulley 369 is connected to the first pulley 351 through a transmission belt transmission connection, and when the second pulley 369 rotates, it drives the second pressure head 3610 to rotate.

[0047] Furthermore, an upper bearing seat and a bearing assembly 362 are fixedly provided at the end of the component bracket 361, and a first hollow shaft 368 is rotatably installed in the upper bearing seat and the bearing assembly 362 through a bearing, and a second pulley 369 is fixedly installed on the outer wall of the first hollow shaft 368. When the second pulley 369 rotates, it drives the first hollow shaft 368 to rotate, and the top of the second hollow shaft 3613 is inserted and connected from the bottom of the first hollow shaft 368. A first pin groove 3617 arranged along the length direction of the first hollow shaft 368 is opened on the side wall of the first hollow shaft 368, and a first fixing pin 3612 is fixedly provided on the outer wall of the second hollow shaft 3613, and the first fixing pin 3612 is movably installed in the first pin groove 3617, so that the second hollow shaft 3613 can move up and down along the inner cavity of the first hollow shaft 368.

[0048] A lower bearing seat and a bearing assembly 365 are fixedly provided at the end of the lifting frame 364, the second hollow shaft 3613 passes through the central bearing of the lower bearing seat and the bearing assembly 365, and is fixedly connected to the bearing, a telescopic rod 3615 is fixedly provided at the upper end of the second pressing head 3610, the top of the telescopic rod 3615 is inserted and connected from the bottom of the second hollow shaft 3613, a third fixing pin 3616 is fixedly provided on the outer wall of the telescopic rod 3615, a second pin groove 3614 arranged along its length direction is opened on the outer wall of the second hollow shaft 3613, the third fixing pin 3616 is movably installed in the second pin groove 3614, so as to realize the upper and lower limit movement of the telescopic rod 3615 along the inner cavity of the second hollow shaft 3613, and a spring 3611 sleeved on the outside of the telescopic rod 3615 is provided between the bottom of the second hollow shaft 3613 and the second pressing head 3610.

[0049] The top of the first hollow shaft 368 passes through the upper bearing seat and the bearing assembly 362 and is fixed with a limiting top plate 367. The end of the assembly bracket 361 is fixed with a limiting frame 366. The limiting top plate 367 is clamped on the limiting frame 366. The limiting frame 366 limits the upper and lower positions of the limiting top plate 367.

[0050] The specific working principle of the utility model will be described in detail below:

[0051] The first press head 23 in the first press head assembly 2 performs X-axis, Y-axis and Z-axis displacement above the fixed substrate 1. The principle is as follows: the upper X-axis base 21 is slidably mounted on the track 11 above the fixed substrate 1, and the upper X-axis motor 22 drives the gear meshing with the track 11 to rotate, driving the first press head assembly 2 as a whole to displace along the X-axis direction above the fixed substrate 1, thereby realizing the X-axis displacement of the first press head 23; the upper Y-axis substrate 27 is slidably mounted on the upper X-axis base 21 through the track, and the gear meshing with the bottom rack of the upper Y-axis substrate 27 is driven to rotate by the upper Y-axis motor 28, thereby realizing the Y-axis displacement of the upper Y-axis substrate 27 above the upper X-axis base 21, thereby realizing the Y-axis displacement of the first press head 23; the upper Z-axis base 25 is mounted on the end of the upper Y-axis substrate 27, and the upper Z-axis cylinder 26 drives the first press head rotation motor 24 to rise and fall, thereby realizing the Z-axis displacement of the first press head 23.

[0052] The principle of the second press head 3610 in the second press head assembly 3 performing X-axis, Y-axis and Z-axis displacement below the fixed substrate 1 is as follows: the lower X-axis base 31 is slidably installed on the track 11 at the lower end of the fixed substrate 1, and the lower X-axis motor 32 drives the gear meshing with the rack 12 at the lower end of the fixed substrate 1 to rotate, thereby driving the second press head assembly 3 to displace the entirety along the X-axis direction at the lower end of the fixed substrate 1, thereby realizing the X-axis displacement of the second press head 3610; the lower Y-axis substrate 33 is slidably installed below the lower X-axis base 31 through the track, and the gear meshing with the rack on the upper end surface of the lower Y-axis substrate 33 is driven by the lower Y-axis motor 34 to rotate, thereby realizing the Y-axis displacement of the lower Y-axis substrate 33 at the lower end of the lower X-axis base 31, thereby realizing the Y-axis displacement of the second press head 3610.

[0053] The Z-axis displacement and rotation principle of the second pressing head 3610: the second pressing head rotating motor 35 drives the first pulley 351 to rotate, and drives the second pulley 369 to rotate through the transmission belt, and the second pulley 369 drives the first hollow shaft 368 and the second hollow shaft 3613 to rotate, drives the telescopic rod 3615 to rotate, thereby drives the second pressing head 3610 to rotate; the downward pressure cylinder 363 drives the lifting frame 364 to rise and fall, thereby drives the second hollow shaft 3613 to rise and fall, thereby realizing the lifting and falling of the telescopic rod 3615 and the third fixed pin 3610, and realizing the elastic downward pressure of the second pressing head 3610 through the spring 3611.

[0054] Since the height positions of the first hollow shaft 368 and the second pulley 369 remain unchanged, a first pin groove 3617 is provided on the outer wall of the first hollow shaft 368, and the third fixing pin 3616 on the outer wall of the second hollow shaft 3613 is slidably installed in the first pin groove 3617 up and down, so the second hollow shaft 3613 can be lifted and lowered during rotation, and the stroke is the length of the first pin groove 3617. The outer wall of the second hollow shaft 3613 is fixedly connected to the inner wall of the lower bearing seat and the inner bearing of the bearing assembly 365, so the lifting frame 364 lifts and lowers to drive the lower bearing seat and the bearing assembly 365 to lift and lower, that is, drives the second hollow shaft 3613 to lift and lower. Since the outer wall of the second hollow shaft 3613 is provided with a second pin slot 3614, the outer wall of the telescopic rod 3615 is provided with a third fixing pin 3616, and the third fixing pin 3616 is slidably installed in the second pin slot 3614, when the second hollow shaft 3613 rotates, the telescopic rod 3615 is driven to rotate through the third fixing pin 3616 and the second pin slot 3614, and the second pressing head 3610 can be driven to rotate. When the second pressing head 3610 is pressed down, the spring 3611 acts as an elastic buffer, and the lifting and lowering of the telescopic rod 3615 does not affect the rotation of the second pressing head 3610, and the rotation and lifting can be synchronized.

[0055] When the first pressing head 23 is pressing the label for edge sewing, the second pressing head 3610 can transfer the label to the processing position. When the first pressing head 23 completes the edge sewing, the processed label is transferred to the discharge port. At this time, the second pressing head 3610 at the processing position transfers the label to the overlocking machine for edge sewing, and the first pressing head 23 returns to the material picking position to transfer the label to the processing position. The two work alternately to improve work efficiency.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-head device for a sheet material edge trimming machine, characterized in that: The invention comprises at least two groups of pressure head assemblies capable of displacement along the X-axis, the Y-axis and the Z-axis, wherein the pressure head assembly comprises a first pressure head assembly (2) and a second pressure head assembly (3), and the first pressure head assembly (2) and the second pressure head assembly (3) are movably mounted on the upper end and the lower end of a fixed base plate (1) respectively, and are movable back and forth along the X-axis direction; The first pressing head assembly (2) comprises a first pressing head (23) movable along an X-axis, a Y-axis and a Z-axis; the second pressing head assembly (3) comprises a lower Y-axis substrate (33) movable along an X-axis and a Y-axis; a lower pressing head assembly (36) is provided at the end of the lower Y-axis substrate (33); the lower pressing head assembly (36) comprises a second pressing head (3610) movable, and the second pressing head (3610) is rotated by a driving member; the driving member comprises a second pressing head rotating motor (35) fixedly mounted on the lower Y-axis substrate (33) away from the end of the lower pressing head assembly (36); the output end of the second pressing head rotating motor (35) is connected to a first pulley (351); the upper end of the second pressing head (3610) is connected to a second pulley (369); the second pulley (369) is connected to the first pulley (351) by a transmission belt, and the second pulley (369) drives the second pressing head (3610) to rotate when the second pulley (369) rotates.

2. According to claim 1, a multi-head device for a sheet material edge trimming machine, characterized in that: The fixed base plate (1) is provided with a track (11) and a rack (12) arranged along the X-axis at the upper and lower ends respectively; The first pressing head assembly (2) further comprises an upper X-axis base (21) slidably mounted above the fixed base plate (1) via a track (11); an upper X-axis motor (22) is provided on the upper X-axis base (21); a gear is provided at the output end of the upper X-axis motor (22), and the gear is meshed with a rack (12) above the fixed base plate (1); an upper Y-axis base plate (27) is slidably mounted on the upper end of the upper X-axis base (21) via a track; a rack arranged along the Y-axis direction is provided at the bottom of the upper Y-axis base plate (27); an upper Y-axis motor (28) is provided at the upper end of the upper X-axis base (21); a gear is provided at the output end of the upper Y-axis motor (28), and the gear is meshed with the rack at the bottom of the upper Y-axis base plate (27); and the first pressing head (23) is arranged at the end of the upper Y-axis base plate (27) in a manner that it can be raised or lowered; The second pressure head assembly (3) further comprises a lower X-axis base (31) slidably mounted below the fixed base plate (1) via a track (11); a lower X-axis motor (32) is provided at the lower end of the lower X-axis base (31); a gear meshing with a rack at the lower end of the fixed base plate (1) is provided at the output end of the lower X-axis motor (32); the bottom of the lower X-axis base (31) is slidably connected to a lower Y-axis base plate (33) via a track; a rack arranged along the Y-axis direction is provided at the upper end of the lower Y-axis base plate (33); a lower Y-axis motor (34) is provided on the lower X-axis base (31); a gear meshing with the rack at the upper end of the lower Y-axis base plate (33) is provided at the output end of the lower Y-axis motor (34).

3. The multi-head device of the sheet material edge trimming machine according to claim 2, characterized in that: The first ram assembly (2) further comprises an upper Z-axis base (25) fixed to the end of the upper Y-axis substrate (27); the upper Z-axis base (25) is vertical; a first ram rotating motor (24) is slidably mounted on the end surface of the upper Z-axis base (25) via a track; the first ram rotating motor (24) performs a lifting action via an upper Z-axis cylinder (26); the first ram (23) is elastically mounted at the output end of the bottom of the first ram rotating motor (24); and the first ram rotating motor (24) drives the first ram (23) to rotate.

4. The multi-head device of the sheet material edge trimming machine according to claim 1, characterized in that: The lower pressure head assembly (36) also includes an assembly bracket (361) fixed to the end of the lower Y-axis substrate (33), the second pulley (369) is rotatably mounted on the end of the assembly bracket (361), a lower pressure cylinder (363) is fixedly provided at the bottom of the assembly bracket (361), the output end of the lower pressure cylinder (363) is downwardly connected to a lifting frame (364), the end of the lifting frame (364) is rotatably connected to a second hollow shaft (3613), the second hollow shaft (3613) is driven to rotate by the rotation of the second pulley (369), the bottom of the second hollow shaft (3613) is elastically connected to the second pressure head (3610), and the second hollow shaft (3613) drives the second pressure head (3610) to rotate when it rotates.

5. The multi-head device of the sheet material edge trimming machine according to claim 4, characterized in that: An upper bearing seat and a bearing assembly (362) are fixedly provided at the end of the component bracket (361), a first hollow shaft (368) is rotatably installed in the upper bearing seat and the bearing assembly (362) through a bearing, the second pulley (369) is fixedly installed on the outer wall of the first hollow shaft (368), and the second pulley (369) drives the first hollow shaft (368) to rotate when rotating, the top of the second hollow shaft (3613) is inserted and connected from the bottom of the first hollow shaft (368), the side wall of the first hollow shaft (368) is provided with a first pin groove (3617) arranged along its length direction, the outer wall of the second hollow shaft (3613) is fixedly provided with a first fixing pin (3612), the first fixing pin (3612) is movably installed in the first pin groove (3617), so as to realize the upper and lower limit movement of the second hollow shaft (3613) along the inner cavity of the first hollow shaft (368); A lower bearing seat and a bearing assembly (365) are fixedly provided at the end of the lifting frame (364); the second hollow shaft (3613) passes through the central bearing of the lower bearing seat and the bearing assembly (365) and is fixedly connected to the bearing; a telescopic rod (3615) is fixedly provided at the upper end of the second pressure head (3610); the top end of the telescopic rod (3615) is inserted and connected from the bottom of the second hollow shaft (3613); a third fixing pin (3616) is fixedly provided on the outer wall of the telescopic rod (3615); a second pin groove (3614) arranged along its length direction is opened on the outer wall of the second hollow shaft (3613); the third fixing pin (3616) is movably installed in the second pin groove (3614) to realize the upper and lower limit movement of the telescopic rod (3615) along the inner cavity of the second hollow shaft (3613).

6. The multi-head device of the sheet material edge trimming machine according to claim 5, characterized in that: A spring (3611) sleeved on the outside of the telescopic rod (3615) is provided between the bottom of the second hollow shaft (3613) and the second pressure head (3610).

7. The multi-head device of the sheet edge trimming machine according to claim 5, characterized in that: The top of the first hollow shaft (368) passes through the upper bearing seat and the bearing assembly (362) and is fixedly provided with a limiting top plate (367). The end of the assembly bracket (361) is fixedly provided with a limiting frame (366). The limiting top plate (367) is clamped on the limiting frame (366), and the limiting frame (366) limits the upper and lower positions of the limiting top plate (367).

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