Metal plate bending machine for display cabinet production

Abstract

The invention relates to the technical field of sheet metal machining, in particular to a sheet metal bending machine for display cabinet production, which comprises a bending worktable, a guide transmission assembly, a retaining assembly and a horizontal calibration assembly, a first mounting cavity is formed in one side of the bending worktable, and second mounting cavities are formed in the two sides of the bending worktable; a control assembly is arranged in the first mounting cavity, and when the upper bending die is controlled to move up and down, the two guide transmission assemblies are synchronously controlled through the control assembly, so that the problem that the telescopic control air cylinders are unstable due to telescopic stroke errors of the double telescopic control air cylinders can be solved; then, when the bending guide column carries out guide transmission supporting through the maintaining assembly, automatic lubricating operation can be carried out, the use stability of the guide transmission assembly is improved, in addition, under the auxiliary effect of the horizontal calibration assembly, the horizontal state of the upper bending die can be rapidly and visually obtained when the upper bending die is replaced, maintained and used in the later period, and the working efficiency is improved. And the sheet metal processing quality is improved, and worry and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal processing, and particularly to a sheet metal bending machine for the production of display cabinets. Background Art

[0002] A display cabinet is a device for displaying items, usually made of materials such as glass, wood, and metal, and is widely used in commercial, exhibition, museum, school and other places that require architectural decoration. When processing a sheet metal display cabinet, it needs to be formed in cooperation with a bending machine;

[0003] The utility model with the existing publication number CN213701442U provides a bending machine for sheet metal parts processing, including a device base plate, a fixed base and a support column. By energizing the device, the hydraulic press starts to work, driving the telescopic rod and the connecting plate to move up and down, thereby driving the upper die to move up and down to bend the sheet metal part, thus achieving the effect that there is no need for manual holding of the sheet metal part to adjust the position, reducing the danger. The above solution reduces the danger of manual holding processing in addition to realizing sheet metal processing through the cooperation between the upper and lower dies. During the sheet metal bending processing of the display cabinet, the sheet metal is horizontally placed on the processing table, and the lifting and moving upper die will press and hold the upper part of the radius. At this time, the lower die can bend the edge of the sheet metal through up-and-down and front-and-back movements. The reciprocating up-and-down movement of the upper die is mainly driven and controlled by two cylinders on both sides of the upper die through guide columns. However, the driving control of the two cylinders is affected by the quality of the cylinders and is prone to tilting of the upper die. Furthermore, when pressing the sheet metal, the force is uneven, and during subsequent bending, the bent part is prone to deformation, resulting in poor bending quality and inconvenient use. Moreover, when the upper die is replaced, maintained and reassembled, it is not convenient to perform rapid horizontal installation. Summary of the Invention

[0004] The purpose of the present invention is to provide a sheet metal bending machine for the production of display cabinets to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sheet metal bending machine for the production of display cabinets, comprising:

[0006] A bending workbench, a first installation cavity is provided on one side of the bending workbench, and second installation cavities are provided on both sides of the bending workbench. A control component is provided in the first installation cavity, and the control component includes a synchronous control shaft;

[0007] A guiding and driving component, the guiding and driving component is provided in the second installation cavity, the guiding and driving component includes a guiding and driving box and a synchronous control disk, both sides of the synchronous control shaft are respectively connected to the centers of one sides of the two synchronous control disks, and a bending guiding column is slidably inserted into the upper end of the guiding and driving box, and the lower end of the bending guiding column is connected to the synchronous control disk;

[0008] A holding component, which is arranged in the guide transmission box and includes a pressing block and an annular diverter groove;

[0009] The horizontal calibration component is arranged at the upper end of the bending guide column, and the horizontal calibration component includes a clamping seat and a laser module.

[0010] Preferably, a telescopic control cylinder is rotatably provided on one side of the first installation cavity, a rotating push block is provided on one side of the synchronous control shaft, a second U-shaped frame is provided on the upper end of the telescopic control cylinder, and the second U-shaped frame is movably connected to the rotating push block through a pushing pin.

[0011] Preferably, the guide transmission box is vertically arranged in the second installation cavity by bolts, a rotating cavity is opened in the guide transmission box, the synchronous control disk is rotatably arranged in the rotating cavity, and both sides of the synchronous control shaft are rotatably inserted into the rotating cavities of the two guide transmission boxes and connected to the two synchronous control disks.

[0012] Preferably, a guide groove is provided at the center of the upper end of the guide transmission box, which is connected to the rotating cavity. A bending guide column vertically moves through the guide groove. The lower end of the bending guide column is placed in the rotating cavity and is provided with a first U-shaped frame. An arc-shaped pulling groove is penetrated through one side of the synchronous control disk. A push-pull connecting pin is horizontally provided at the lower end of the first U-shaped frame. The push-pull connecting pin moves horizontally and passes through the arc-shaped pulling groove. A sliding roller sleeve is rotatably sleeved on one side of the push-pull connecting pin placed in the arc-shaped pulling groove.

[0013] Preferably, the two bending guide columns are respectively and vertically movable through the bending workbench, and a connecting thread is provided on the upper end of the bending guide column that passes through the bending workbench. A bending upper mold is horizontally provided above the bending workbench, and two combination seats are symmetrically provided at both ends of the bending upper mold. The two combination seats are respectively and vertically movably sleeved on the connecting threads of the bending guide columns, and two adjusting nuts are sleeved on the connecting threads of the bending guide columns, and the two adjusting nuts are respectively abutted against the upper and lower ends of the combination seat.

[0014] Preferably, a piston oil groove is vertically opened at the lower end of the rotating chamber of the guide transmission box, and the upper and lower ends of the pressing block are respectively placed in the rotating chamber and the piston oil groove. A downward pressing piston is provided on one side of the pressing block placed in the piston oil groove, and a return spring is provided at the lower end of the downward pressing piston located in the piston oil groove.

[0015] Preferably, a plurality of connecting grooves are provided in the piston oil groove at the lower end connected to the rotating chamber, the diameters of the plurality of connecting grooves are smaller than the thickness of the pressing piston, and a yield groove is provided on the side of the synchronous control disk away from the arc-shaped pulling groove, and when the bending upper mold rises to the maximum extent, the yield groove corresponds to the pressing block.

[0016] Preferably, a transfer groove is formed at the lower end of the piston oil groove in the guiding transmission box. A sealing knob is hermetically inserted into the lower end of the transfer groove through threads. A transfer through groove is formed at the upper end of the transfer groove and communicates with the lower end of the piston oil groove. A filter cover is arranged at the upper end of the sealing knob. The filter cover is placed in the transfer groove, and the upper end of the filter cover is inserted into the transfer through groove.

[0017] Preferably, a plurality of ball grooves are symmetrically arranged in the guiding groove. Sliding balls are rotatably inserted into the plurality of ball grooves. An annular diversion groove is horizontally formed at the upper end of one side of the guiding transmission box corresponding to the guiding groove. A plurality of distribution holes are formed in the annular diversion groove and communicate with the guiding groove. A transfer oil groove is formed in communication with one side of the transfer groove. A lifting oil groove is formed in communication with one side of the transfer oil groove and the annular diversion groove. A one-way valve is arranged on one side of the transfer oil groove close to the transfer groove.

[0018] Preferably, an assembly insertion slot is formed at the center of the upper end of the bending guiding column provided with a connecting thread. An I-shaped assembly block is arranged on one side of the clamping seat. The I-shaped assembly block is vertically inserted into the assembly insertion slot. An assembly nut is screwed onto the upper end of the bending guiding column located on the I-shaped assembly block through the connecting thread. A light-transmitting calibration groove is horizontally formed through one side of the bending upper die. A laser module is horizontally inserted into one side of the clamping seat, and the two laser modules are respectively arranged corresponding to both sides of the light-transmitting calibration groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] When controlling the up-and-down movement of the bending upper die, through the synchronous control of the two guiding transmission components by the control component, the problem of instability of the telescopic control cylinder caused by the telescopic stroke error of the double telescopic control cylinders can be avoided. Then, when the bending guiding column is guided and driven and supported by the maintaining component, automatic lubrication operation can be carried out, improving the use stability of the guiding transmission components. In addition, with the assistance of the horizontal calibration component, when the bending upper die is replaced, maintained, and used later, the horizontal state of the bending upper die can be quickly and intuitively obtained, improving the quality of sheet metal processing and saving worry and effort. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of part B;

[0024] Figure 4 It is a schematic diagram of the partial side cutting structure of the present invention;

[0025] Figure 5 For the present inventionFigure 4 Schematic diagram of part C;

[0026] Figure 6 This is for the present invention Figure 5 Schematic diagram of part D;

[0027] Figure 7 This is for the present invention Figure 5 Schematic diagram of part E;

[0028] Figure 8 Schematic diagram of the connection structure of the second installation cavity of the present invention;

[0029] Figure 9 Schematic diagram of the connection structure of the synchronous control disk of the present invention;

[0030] Figure 10 This is for the present invention Figure 9 Schematic diagram of part F.

[0031] In the figure: bending workbench 1, first installation cavity 2, second installation cavity 3, guiding transmission box 4, synchronous control shaft 5, synchronous control disk 6, guiding groove 7, bending guiding column 8, first U-shaped frame 9, push-pull connection pin 10, sliding rolling sleeve 11, relief groove 12, piston oil groove 13, pressing block 14, downward pressing piston 15, return spring 16, connection groove 17, transfer groove 18, sealing knob 19, filter cover 20, annular diversion groove 21, distribution hole 22, lifting oil groove 23, transfer oil groove 24, check valve 25, connection thread 26, bending upper die 27, combination seat 28, adjusting nut 29, assembly slot 30, clamping seat 31, I-shaped assembly block 32, light-transmitting calibration groove 33, laser module 34, arc-shaped pulling chute 35, rotating pushing block 36, telescopic control cylinder 37, second U-shaped frame 38, sliding ball 39. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to the attached Figure 1-10 , and the present application provides the following technical solutions.

[0034] Embodiment 1: A sheet metal bending machine for the production of display cabinets, including a bending workbench 1. A first installation cavity 2 is opened on one side of the bending workbench 1, and second installation cavities 3 are opened on both sides of the bending workbench 1. A control component is provided in the first installation cavity 2. The control component includes a synchronous control shaft 5. A telescopic control cylinder 37 is rotatably provided on one side in the first installation cavity 2. A rotating push block 36 is provided on one side of the synchronous control shaft 5. A second U-shaped frame 38 is provided at the upper end of the telescopic control cylinder 37. The second U-shaped frame 38 is movably connected to the rotating push block 36 through a pushing pin shaft. When using the sheet metal bending of the display cabinet, first place the sheet metal on the upper end of the bending workbench 1, and then through the lifting control of the second U-shaped frame 38, the subsequent pressing and stabilizing operation of the sheet metal can be realized. The telescopic push of the second U-shaped frame 38 can realize the rotation control of the synchronous control shaft 5.

[0035] A guiding transmission component is arranged to cooperate with the synchronous control shaft 5. The guiding transmission component is arranged in the second installation cavity 3. The guiding transmission component includes a guiding transmission box 4 and a synchronous control disk 6. Both sides of the synchronous control shaft 5 are respectively connected to the centers of one sides of the two synchronous control disks 6. A bending guiding column 8 is slidably inserted at the upper end of the guiding transmission box 4. The lower end of the bending guiding column 8 is connected to the synchronous control disk 6. The guiding transmission box 4 is vertically arranged in the second installation cavity 3 through bolts. A rotating cavity is opened in the guiding transmission box 4. The synchronous control disk 6 is rotatably arranged in the rotating cavity. Both sides of the synchronous control shaft 5 are respectively rotatably inserted into the rotating cavities of the two guiding transmission boxes 4 and are connected to the two synchronous control disks 6. When the synchronous control shaft 5 rotates, it can push the two synchronous control disks 6 to rotate simultaneously;

[0036] A guiding groove 7 is provided at the center of the upper end of the guiding transmission box 4 and communicates with the rotating cavity. The bent guiding column 8 is vertically movably penetrated through the guiding groove 7. The lower end of the bent guiding column 8 is placed in the rotating cavity and is provided with a first U-shaped frame 9. An arc-shaped pulling sliding groove 35 is penetrated through one side of the synchronous control disk 6. A push-pull connecting pin 10 is horizontally arranged at the lower end of the first U-shaped frame 9. The push-pull connecting pin 10 is horizontally movably penetrated through the arc-shaped pulling sliding groove 35. And a sliding rolling sleeve 11 is rotatably sleeved on one side of the push-pull connecting pin 10 placed in the arc-shaped pulling sliding groove 35. The two bent guiding columns 8 are respectively vertically movably penetrated through the bending workbench 1. A connecting thread 26 is provided at the upper end of the bent guiding column 8 penetrating through the bending workbench 1. A bending upper die 27 is horizontally arranged above the bending workbench 1. Two combination seats 28 are symmetrically arranged at both ends of the bending upper die 27. The two combination seats 28 are respectively vertically movably sleeved on the connecting threads 26 of the bent guiding columns 8. Adjusting nuts 29 are sleeved on the connecting threads 26 of the bent guiding columns 8. And the two adjusting nuts 29 are respectively abutted against the upper and lower ends of the combination seats 28. When the synchronous control disk 6 rotates along with the synchronous control shaft 5, the first U-shaped frame 9 and the bent guiding column 8 can only move up and down along the inner wall of the guiding transmission box 4 and the guiding groove 7. Through the sliding fit between the arc-shaped pulling sliding groove 35 of the synchronous control disk 6 and the first U-shaped frame 9, the up and down movement of the bent guiding column 8 can be controlled. Furthermore, through the control of a single second U-shaped frame 38 by the synchronous control shaft 5, the lifting control of the two bent guiding columns 8 can be simultaneously realized, avoiding the possible movement stroke error of the double second U-shaped frames 38, so that the bending upper die 27 can maintain a stable horizontal posture to press and stabilize the display cabinet sheet metal.

[0037] A retaining assembly is provided to lubricate and retain the sliding between the synchronous control disk 6 and the first U-shaped frame 9 and the sliding between the guide groove 7 and the bending guide column 8. The retaining assembly is arranged in the guide transmission box 4. The retaining assembly includes a pressing block 14 and an annular diverter groove 21. A piston oil groove 13 is vertically opened at the lower end of the rotating chamber of the guide transmission box 4. The upper and lower ends of the pressing block 14 are respectively placed in the rotating chamber and the piston oil groove 13. A pressing piston 15 is provided on one side of the pressing block 14 placed in the piston oil groove 13. A return spring 16 is provided at the lower end of the pressing piston 15 located in the piston oil groove 13. A plurality of connecting grooves 17 are opened in the piston oil groove 13 at the lower end connected to the rotating chamber. The diameters of the plurality of connecting grooves 17 are smaller than the thickness of the pressing piston 15. A clearance groove 12 is provided on the side of the synchronous control disk 6 away from the arc-shaped pulling groove 35. When the bending upper mold 27 rises to the maximum extent, the clearance groove 12 corresponds to the pressing block 14; the bottom of the rotating cavity of the guide transmission box 4 is filled with a certain amount of lubricating oil. When the synchronous control disk 6 rotates to control the bending upper mold 27 to descend and press the sheet metal, the clearance groove 12 will abut against the pressing block 14 during the rotation of the synchronous control disk 6, and then under the continuous rotation of the synchronous control disk 6, the pressing block 14 is pushed downward into the piston oil groove 13. During the downward pushing process, the pressing piston 15 will first block the connecting groove 17, and then continue to descend, and push the lubricating oil at the bottom of the piston oil groove 13 into the transfer groove 18.

[0038] An intermediate transfer groove 18 is provided at the lower end of the piston oil groove 13 inside the guiding transmission box 4. A sealing knob 19 is threadedly and sealingly inserted at the lower end of the intermediate transfer groove 18. A transfer through groove is provided at the upper end of the intermediate transfer groove 18 and communicates with the lower end of the piston oil groove 13. A filter cover 20 is provided at the upper end of the sealing knob 19. The filter cover 20 is placed inside the intermediate transfer groove 18, and the upper end of the filter cover 20 is inserted into the transfer through groove. A number of ball grooves are symmetrically provided in the guiding groove 7, and sliding balls 39 are rotatably inserted into the number of ball grooves. A circular diversion groove 21 is horizontally provided at the upper end on one side of the guiding groove 7 inside the guiding transmission box 4. A number of distribution holes 22 are provided in the circular diversion groove 21 and communicate with the guiding groove 7. A connecting transfer oil groove 24 is provided in communication with one side of the intermediate transfer groove 18. A lifting oil groove 23 is provided in communication with one side of the connecting transfer oil groove 24 and the circular diversion groove 21. A check valve 25 is provided on the side of the connecting transfer oil groove 24 close to the intermediate transfer groove 18. Since the intermediate transfer groove 18 is always in a communicating state through the piston oil groove 13 and the connecting through groove 17 when the bending upper die 27 is not in a descending state, as the pressing piston 15 descends, the lubricating oil in the piston oil groove 13 will be pressurized and pushed into the intermediate transfer groove 18. At the same time, the lubricating oil entering the intermediate transfer groove 18 can be filtered through the filter cover 20. Then, after the lubricating oil in the intermediate transfer groove 18 increases, it will push the check valve 25 and enter the connecting transfer oil groove 24 and the lifting oil groove 23. As the synchronous control disk 6 rotates back and forth multiple times, the lubricating oil can be controlled to be fed into the lifting oil groove 23 in small amounts multiple times. Then, it enters the circular diversion groove 21 from the lifting oil groove 23 and drips from the distribution holes 22 onto the guiding joint position of the guiding groove 7 and the bending guiding post 8. Finally, it drips onto the connecting position of the first U-shaped bracket 9 and the synchronous control disk 6 to lubricate and maintain the arc-shaped pulling sliding groove 35 and the sliding roller sleeve 11.

[0039] Embodiment 2: On the basis of Embodiment 1, a horizontal calibration component is provided to calibrate the horizontal state of the bending upper die 27. The horizontal calibration component is arranged at the upper end of the bending guide post 8. The horizontal calibration component includes a clamping seat 31 and a laser module 34. An assembly slot 30 is opened at the center of the upper end of the bending guide post 8 where the connecting thread 26 is provided. An I-shaped assembly block 32 is arranged on one side of the clamping seat 31. The I-shaped assembly block 32 is vertically inserted into the assembly slot 30. An assembly nut is screwed on the upper end of the bending guide post 8 located at the I-shaped assembly block 32 through the connecting thread 26. A light-transmitting calibration slot 33 is horizontally penetrated on one side of the bending upper die 27. The laser module 34 is horizontally inserted into one side of the clamping seat 31, and the two laser modules 34 are respectively arranged corresponding to both sides of the light-transmitting calibration slot 33. When assembling and disassembling the bending upper die 27, rapid connection can be achieved through the socket connection between the combination seat 28 and the bending guide post 8. Then, by adjusting the up-and-down positions of the two adjusting nuts 29, the up-and-down position heights of both ends of the bending upper die 27 are adjusted and fixed. During this period, calibration is performed through the emission and reception of the two laser modules 34 passing through the light-transmitting calibration slot 33, which can improve the efficiency and quality of horizontal adjustment. In addition, when the laser module 34 has an online data transmission module, the two laser modules 34 can be continuously used in cooperation to perform real-time detection of the horizontal state during the lifting process of the bending upper die 27, improving the quality of sheet metal processing.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sheet metal bending machine for display cabinet production, characterized in that, Including: A bending workbench (1), on one side of the bending workbench (1), a first installation cavity (2) is provided, and second installation cavities (3) are provided on both sides of the bending workbench (1). A control component is provided in the first installation cavity (2), and the control component includes a synchronous control shaft (5); A guiding transmission component, the guiding transmission component is provided in the second installation cavity (3), the guiding transmission component includes a guiding transmission box (4) and a synchronous control disc (6), both sides of the synchronous control shaft (5) are respectively connected to the centers of one sides of the two synchronous control discs (6). A bending guiding column (8) is slidably inserted and arranged at the upper end of the guiding transmission box (4), and the lower end of the bending guiding column (8) is connected to the synchronous control disc (6); A holding component, the holding component is provided in the guiding transmission box (4), and the holding component includes a pressing block (14) and an annular diversion groove (21); A horizontal calibration component, the horizontal calibration component is provided at the upper end of the bending guiding column (8), and the horizontal calibration component includes a clamping seat (31) and a laser module (34).

2. The sheet metal bending machine for display cabinet production according to claim 1, wherein: One side in the first installation cavity (2) is rotatably provided with a telescopic control cylinder (37), one side of the synchronous control shaft (5) is provided with a rotating push block (36), the upper end of the telescopic control cylinder (37) is provided with a second U-shaped frame (38), and the second U-shaped frame (38) is movably connected to the rotating push block (36) through a pushing pin shaft.

3. A sheet metal bending machine for display cabinet production according to claim 2, characterized in that: The guiding transmission box (4) is vertically arranged in the second installation cavity (3) through bolts. A rotating cavity is provided in the guiding transmission box (4), the synchronous control disc (6) is rotatably arranged in the rotating cavity, and both sides of the synchronous control shaft (5) are respectively rotatably inserted into the rotating cavities of the two guiding transmission boxes (4) and are connected to the two synchronous control discs (6).

4. A sheet metal bending machine for showcase production according to claim 3, characterized in that: A guiding groove (7) is provided at the center of the upper end of the guiding transmission box (4) communicating with the rotating cavity. The bending guiding column (8) is vertically movably arranged through the guiding groove (7). The lower end of the bending guiding column (8) is placed in the rotating cavity and is provided with a first U-shaped frame (9). An arc-shaped pulling sliding groove (35) is provided through one side of the synchronous control disc (6). A pushing and pulling connecting pin (10) is horizontally arranged at the lower end of the first U-shaped frame (9), and the pushing and pulling connecting pin (10) is horizontally movably arranged through the arc-shaped pulling sliding groove (35), and a sliding rolling sleeve (11) is rotatably sleeved on one side of the pushing and pulling connecting pin (10) placed in the arc-shaped pulling sliding groove (35).

5. A sheet metal bending machine for display cabinet production according to claim 4, characterized in that: The two bending guiding columns (8) are respectively vertically movably arranged through the bending workbench (1). The upper end of the bending guiding column (8) passing through the bending workbench (1) is provided with a connecting thread (26). A bending upper die (27) is horizontally arranged above the bending workbench (1). Two combination seats (28) are symmetrically arranged at both ends of the bending upper die (27). The two combination seats (28) are respectively vertically movably sleeved on the connecting threads (26) of the bending guiding columns (8). Two adjusting nuts (29) are sleeved on the connecting threads (26) of the bending guiding columns (8), and the two adjusting nuts (29) are respectively abutted against the upper and lower ends of the combination seats (28).

6. The sheet metal bending machine for display cabinet production according to claim 5, characterized in that: A piston oil groove (13) is vertically opened at the lower end of the rotating chamber of the guide transmission box (4); the upper and lower ends of the pressing block (14) are respectively placed in the rotating chamber and the piston oil groove (13); a pressing piston (15) is provided on one side of the pressing block (14) placed in the piston oil groove (13); and a return spring (16) is provided at the lower end of the pressing piston (15) located in the piston oil groove (13).

7. A sheet metal bending machine for display cabinet production according to claim 6, characterized in that: A plurality of connecting grooves (17) are provided in the piston oil groove (13) at the lower end thereof and connected to the rotating chamber. The diameters of the plurality of connecting grooves (17) are smaller than the thickness of the pressing piston (15). A clearance groove (12) is provided on the side of the synchronous control plate (6) away from the arc-shaped pulling slide groove (35). When the bending upper die (27) rises to the maximum extent, the clearance groove (12) corresponds to the pressing block (14).

8. A sheet metal bending machine for the production of display cabinets according to claim 7, characterized in that: A transfer groove (18) is provided in the guide transmission box (4) at the lower end of the piston oil groove (13); a sealing knob (19) is provided at the lower end of the transfer groove (18) through a threaded sealing plug; a transfer groove is provided at the upper end of the transfer groove (18) and is connected to the lower end of the piston oil groove (13); a filter cover (20) is provided at the upper end of the sealing knob (19); the filter cover (20) is placed in the transfer groove (18), and the upper end of the filter cover (20) is plugged into the transfer groove.

9. A sheet metal bending machine for display cabinet production according to claim 8, characterized in that: A plurality of ball grooves are symmetrically arranged in the guide groove (7), and sliding balls (39) are rotatably inserted in the plurality of ball grooves. An annular flow dividing groove (21) is horizontally arranged at the upper end of one side of the guide groove (7) in the guide transmission box (4), and a plurality of distribution holes (22) are arranged in the annular flow dividing groove (21) and connected to the guide groove (7). A transfer oil groove (24) is arranged in communication with one side of the transfer groove (18), and a lifting oil groove (23) is arranged in communication with the annular flow dividing groove (21), and a one-way valve (25) is arranged in the transfer oil groove (24) on one side close to the transfer groove (18).

10. A sheet metal bending machine for display cabinet production according to claim 9, characterized in that: The bending guide column (8) is provided with an assembly slot (30) at the center of the upper end thereof having a connecting thread (26); an I-shaped assembly block (32) is provided on one side of the card-mounted seat (31); the I-shaped assembly block (32) is vertically plugged into the assembly slot (30); the bending guide column (8) is located at the upper end of the I-shaped assembly block (32) and is screwed with an assembly nut through the connecting thread (26); a light-transmitting calibration slot (33) is horizontally penetrated on one side of the bending upper die (27); a laser module (34) is horizontally plugged into one side of the card-mounted seat (31), and two laser modules (34) are respectively arranged corresponding to the two sides of the light-transmitting calibration slot (33).

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