Thickness-adjustable sharp corner bending mechanism for metal plate

Abstract

The invention relates to the field of automation, in particular to a sharp corner bending mechanism for adjusting the thickness of a metal plate. The sharp corner bending mechanism comprises a lathe bed, a servo adjusting assembly a, an R bending machine, an L bending machine and a PLC control module. The R bending machine and the L bending machine are mirror image parts of each other and are symmetrically arranged on the two sides of the lathe bed, and the servo adjusting assembly a drives the R bending machine and the L bending machine to do linear motion along the guide rail a. The PLC control module controls the servo adjusting assembly a, the R bending machine and the L bending machine to act. According to the automatic bending device, a fillet with a small bending angle R1 can be produced, the gap of the bending die can be automatically adjusted to adapt to stainless steel outer covers with different thicknesses, the design structure is exquisite, full-flexible production is achieved, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the field of automation, and particularly to a sharp-angle bending mechanism for adjustable sheet metal thickness. Background Art

[0002] In the automated sheet metal forming line of the household appliance industry, most metal sheet forming processes require bending. Currently, the sheet metal bending mechanisms on the market are structures that achieve the bending function through the coordinated movement of a moving knife and a pressing knife. The pressing knife and the padding knife plate clamp the sheet material, and the moving knife moves along the center of the tip of the pressing knife to bend the sheet material. To achieve bending with this structure, the tip of the moving knife needs to move along the center of the tip of the pressing knife, leaving a thickness of the sheet material for movement. The tip of the pressing knife cannot be made too sharp and must have a certain arc, otherwise the tip is extremely easy to damage. This results in the bending R angle not being able to be too small. Also, the adjustment of the sheet material thickness is achieved by adjusting the position of the moving knife, thereby changing the distance between the moving knife and the pressing knife to adjust the thickness range of the sheet material. The existing mechanism can only be finely adjusted by 0.1 - 0.15 mm. Therefore, to meet the forming requirements of the sheet metal production line in the kitchenware industry, a sharp-angle bending process with adjustable thickness is needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a sharp-angle bending mechanism for adjustable sheet metal thickness. Using this mechanism, a smaller rounded corner with an R of R1 can be produced for bending, and the bending die gap can be automatically adjusted to adapt to stainless steel outer covers of different thicknesses. The design structure is delicate, the production is fully flexible, and the cost is saved.

[0004] The present invention provides a sharp-angle bending mechanism for adjustable sheet metal thickness, including: a bed body, a servo adjustment component a, an R bending machine, an L bending machine, and a PLC control module;

[0005] The R bending machine and the L bending machine are mirror images of each other and are symmetrically arranged on both sides of the bed body. The servo adjustment component a drives the R bending machine and the L bending machine to perform a linear motion along the guide rail a;

[0006] The R bending machine includes a frame, a padding knife, a bending pressure application component, a gap adjustment component, and a side positioning component,

[0007] The bending pressure application component includes an oil cylinder, a template, a pressure roller, a screw, a spring, and a pressure plate,

[0008] The template is connected to the frame through a guide post and a guide sleeve; an oil cylinder is connected to the template, and a spring and a pressure roller are connected to the lower surface of the template;

[0009] The screw passes through the light hole on the template and is screwed to the pressure plate;

[0010] The padding knife is connected to the frame and is located below the pressure plate;

[0011] The gap adjustment assembly includes a servo assembly b, a connecting wedge block, a limit assembly, a mounting plate, a bending execution assembly, a bending die assembly, and a limit block.

[0012] The connecting wedge block is connected to the servo assembly b through a lead screw nut seat; the limit assembly is connected between the servo assembly b and the mounting plate.

[0013] The mounting plate is mounted on the frame.

[0014] The bending execution assembly includes a horizontal pressing strip, a vertical pressing strip, an adjusting top plate, a setscrew, an adjusting pad shaft, an adjusting wedge block, and an adjusting block. Among them, the horizontal pressing strip and the vertical pressing strip are both screwed to the mounting plate; the adjusting top plate is mounted on the mounting plate; the setscrew passes through the adjusting top plate and is connected to the adjusting block; the adjusting pad shaft is mounted between the adjusting top plate and the adjusting block; the adjusting wedge block is connected to the adjusting block; the adjusting block is pressed on the mounting plate through the horizontal pressing strip; the connecting wedge block moves downward to squeeze the adjusting wedge block and push the adjusting block to move horizontally.

[0015] The bending die assembly is pressed on the adjusting block through the vertical pressing strip.

[0016] The limit block is screwed to the adjusting block.

[0017] The side positioning assembly is mounted on the side of the frame.

[0018] The PLC control module controls the servo adjustment assembly a, the R bending machine, and the L bending machine to act.

[0019] Further, the lead screw nut seats in the servo adjustment assembly a are respectively screwed to the bottom plates of the R bending machine and the L bending machine to drive the R bending machine and the L bending machine to move linearly along the guide rail a through the sliders a mounted on their bottom surfaces.

[0020] Further, the bending pressure application assembly further includes a guide pillar and bushing, an oil cylinder connecting plate, a pressing block, a roller connecting block, a roller copper bushing, and a roller.

[0021] The roller copper bushings are mounted on both sides of the roller, and the roller connecting blocks are mounted on the roller copper bushings, and the roller connecting blocks are screwed to the lower surface of the template.

[0022] The bushing parts of the guide pillar and bushing are all screwed and mounted on the frame, and the pillar parts of the guide pillar and bushing are screwed to the upper surface of the template.

[0023] The oil cylinder is fixed on the oil cylinder connecting plate, and the pressing block fixes the oil cylinder connecting plate on the upper surface of the template.

[0024] Furthermore, the limiting assembly includes a limiting shaft and a limiting flange seat, one end of the limiting shaft is screwed to the servo assembly b, and the other end is connected to the mounting plate through the limiting flange seat.

[0025] Furthermore, a wear-resistant plate is connected to the mounting plate.

[0026] Furthermore, the adjusting top plate is mounted on the mounting plate; and the top screw is screwed to the adjusting block through the light hole of the adjusting top plate.

[0027] Furthermore, the bending mold assembly includes a unloading spring, a spring guide column, a bending mold, and a guide column connecting block, wherein the unloading spring is installed on the spring guide column; the spring guide column is installed on the guide column connecting block; the bending mold is pressed on the adjustment block through a vertical pressure strip; and the guide column connecting block is screwed on the bending mold.

[0028] Furthermore, the side positioning assembly includes a servo assembly c, a side positioning mounting plate, a side positioning bottom plate, a front positioning plate, a positioning roller, a hinge assembly, and a sheet guide plate.

[0029] The servo assembly c is mounted on the side positioning bottom plate, and its nut seat is screwed with the side positioning mounting plate to drive the side positioning mounting plate to slide;

[0030] The side positioning mounting plate is equipped with a front positioning plate, a positioning roller, a hinge assembly and a sheet guide.

[0031] The side positioning base plate is installed on the frame.

[0032] Furthermore, the hinge assembly includes a hinge shaft, a hinge mounting plate, and a pin, wherein the hinge shaft is mounted on the hinge mounting plate via the pin.

[0033] Furthermore, the side positioning assembly also includes a guide rail mounting plate, a slider c, and a guide rail c.

[0034] A slider c is installed on the bottom surface of the side positioning mounting plate, and the slider c moves linearly along the guide rail c;

[0035] The guide rail c is mounted on the guide rail mounting plate;

[0036] The guide rail mounting plates are mounted on both sides of the side positioning bottom plate.

[0037] Compared with the prior art, the sharp-angle bending mechanism for adjustable sheet metal thickness of the present invention breaks through the bending technology in the traditional sheet metal production line where the bending angle is relatively large and the workpiece thickness cannot be adjusted. It realizes the automatic adjustment of the bending die gap, adapts to the stainless steel outer covers of range hoods with different thicknesses, and has a bending process with a bending angle of R1. It changes the traditional sheet metal bending forming technology, optimizes the traditional forming technology of the moving knife rotating around the pressing knife into a downward pressing forming technology with the cooperation of the gap adjustment component and the bending pressure component, realizes the automatic adjustment of the bending die gap, adapts to the bending production of the stainless steel outer covers of range hoods with different thicknesses, and realizes the small-arc bending process with a bending angle of R1. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the sharp-angle bending mechanism for adjustable sheet metal thickness;

[0039] Figure 2 is the front view of the sharp-angle bending mechanism for adjustable sheet metal thickness;

[0040] Figure 3 is a schematic diagram of a partial structure of the R bending machine;

[0041] Figure 4 is a schematic diagram of a partial structure of the bending pressure component;

[0042] Figure 5 is the front view of the gap adjustment component;

[0043] Figure 6 is the left view of the gap adjustment component;

[0044] Figure 7 is Figure 5 the sectional view of the A-A plane of

[0045] Figure 8 is a schematic diagram of a partial structure of the side positioning part;

[0046] Figure 9 is a schematic diagram of a partial structure of the side positioning part;

[0047] In the figure,

[0048] 1-bed, 2-servo adjustment component a, 3-R bending machine, 4-L bending machine, 5-guide rail a, 6-slider a, 7-frame, 8-shim knife, 9-bending pressure component, 10-gap adjustment component, 11-side positioning component, 12-cylinder, 13-guide column and guide sleeve, 14-cylinder connecting plate, 15-pressing block, 16-template, 17-pressing roller connecting block, 18-pressing roller copper sleeve, 19-pressing roller, 20-screw, 21-spring, 22-pressing plate, 23-servo component b, 24-connecting wedge, 25-limiting component, 26-mounting plate, 27-bending actuator component, 28-bending mold component, 29-limiting block , 30-limit shaft, 31-limit flange seat, 32-horizontal pressure strip, 33-wear-resistant plate, 34-vertical pressure strip, 35-adjust top plate, 36-top screw, 37-adjust pad shaft, 38-adjust wedge, 39-adjust block, 40-unloading spring, 41-spring guide column, 42-bending mold, 43-guide column connecting block, 44-servo component c, 45-side positioning mounting plate, 46-guide rail mounting plate, 47-side positioning bottom plate, 48-front positioning plate, 49-positioning roller, 50-hinge assembly, 51-sheet guide plate, 52-slider c, 53-guide rail c, 54-hinge shaft, 55-hinge mounting plate, 56-pin shaft. DETAILED DESCRIPTION

[0049] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0050] The embodiment of the present invention discloses a sharp-angle bending mechanism for sheet metal with adjustable thickness, comprising: a bed 1, a servo adjustment component a 2, an R bending machine 3, an L bending machine 4, and a PLC control module;

[0051] The bed 1 is provided with a guide rail a5, and the servo adjustment assembly a2 is symmetrically installed at both ends of the bed 1;

[0052] The R bending machine 3 and the L bending machine 4 are mirror images of each other and are symmetrically arranged on both sides of the bed 1. The nut seats in the servo adjustment assembly a 2 are respectively screwed with the bottom plates of the R bending machine 3 and the L bending machine 4 to drive the R bending machine 3 and the L bending machine 4 to move linearly along the guide rail a 5 via the slider a 6 installed on the bottom surface thereof;

[0053] The R bending machine 3 includes a frame 7, a backing knife 8, a bending pressure component 9, a gap adjustment component 10 and a side positioning component 11, wherein:

[0054] The frame 7 is respectively screwed with a backing knife 8, a bending pressure assembly 9, a gap adjustment assembly 10 and a side positioning assembly 11;

[0055] The bending and pressing assembly 9 includes an oil cylinder 12, a guide pillar and bushing 13, an oil cylinder connecting plate 14, a pressing block 15, a template 16, a roller connecting block 17, a roller copper bushing 18, a roller 19, a screw 20, a spring 21, and a blank holder 22. Among them, the oil cylinder 12 and the bushing part of the guide pillar and bushing 13 are both screwed and installed on the frame 7. The oil cylinder connecting plate 14 is screwed to the oil cylinder 12. The pillar part of the guide pillar and bushing 13 is screwed to the upper surface of the template 16. The pressing block 15 presses on the oil cylinder connecting plate 14 and is then screwed to the upper surface of the template 16. The roller copper bushing 18 is installed on both sides of the roller 19. Then the roller connecting block 17 is installed on the roller copper bushing 18 and is then screwed to the lower surface of the template 16. The spring 21 is screwed to the lower surface of the template 16. The screw 20 passes through the light hole in the template 16 and is screwed to the blank holder 22.

[0056] The gap adjusting assembly 10 includes a servo assembly b 23, a connecting wedge block 24, a limiting assembly 25, a mounting plate 26, a bending execution assembly 27, a bending die assembly 28, and a limiting block 29. Among them,

[0057] The connecting wedge block 24 is connected to the servo assembly b 23 through a lead screw nut seat;

[0058] The limiting assembly 25 includes a limiting shaft 30 and a limiting flange seat 31. Among them, the limiting shaft 30 is screwed to the servo assembly b23, and the limiting flange seat 31 is screwed to the mounting plate 26;

[0059] The mounting plate 26 is installed on the frame 7;

[0060] The bending execution assembly 27 includes a horizontal pressing strip 32, a wear-resistant plate 33, a vertical pressing strip 34, an adjusting top plate 35, a setscrew 36, an adjusting pad shaft 37, an adjusting wedge block 38, and an adjusting block 39. Among them, the horizontal pressing strip 32, the wear-resistant plate 33, and the vertical pressing strip 34 are all screwed to the mounting plate 26. The adjusting top plate 35 is inlaid and installed on the mounting plate 26. The setscrew 36 passes through the light hole of the adjusting top plate 35 and is screwed to the adjusting block 39. The setscrew 36 restricts the up and down movement of the adjusting block 39 to ensure its horizontal movement. The adjusting pad shaft 37 is located between the adjusting top plate 35 and the adjusting block 39 and is installed on the adjusting block 39. The adjusting pad shaft 37 restricts the rebound of the adjusting block 39 to ensure the horizontal movement of the limiting block 39. The adjusting wedge block 38 is screwed to the adjusting block 39. The adjusting block 39 is pressed on the mounting plate 26 through the horizontal pressing strip 32. The connecting wedge block 24 moves downward to squeeze the adjusting wedge block 38 and push the adjusting block 39 to move horizontally;

[0061] The bending die assembly 28 includes a stripping spring 40, a spring guide post 41, a bending die 42, and a guide post connecting block 43. Among them, the stripping spring 40 is installed on the spring guide post 41; the spring guide post 41 is installed on the guide post connecting block 43; the bending die 42 is pressed on the adjusting block 39 through a vertical pressing strip 34; the guide post connecting block 43 is screwed on the bending die 42;

[0062] The limiting block 29 is screwed on the adjusting block 39;

[0063] The side positioning assembly 11 includes a servo assembly c 44, a side positioning mounting plate 45, a guide rail mounting plate 46, a side positioning bottom plate 47, a front positioning plate 48, a positioning roller 49, a hinge assembly 50, and a sheet metal guide plate 51. Among them,

[0064] The servo assembly c 44 is installed on the side positioning bottom plate 47, and its lead screw nut seat is screwed to the side positioning mounting plate 45 to drive the front positioning plate 48, the positioning roller 49, the hinge assembly 50, and the sheet metal guide plate 51 to move linearly along the guide rail c 53 through the slider c 52 installed on the bottom surface of the side positioning mounting plate 45;

[0065] The side positioning mounting plate 45 is connected to the lead screw nut seat and connected to the slider c 52;

[0066] The guide rail mounting plate 46 is installed on both sides of the side positioning bottom plate 47;

[0067] The side positioning bottom plate 47 is installed on the frame 7;

[0068] The front positioning plate 48, the positioning roller 49, the hinge assembly 50, and the sheet metal guide plate 51 are all installed on the side positioning mounting plate 45;

[0069] The hinge assembly 50 includes a hinge shaft 54, a hinge mounting plate 55, and a pin shaft 56. Among them, the hinge shaft 54 is installed on the hinge mounting plate 55 through the pin shaft 56;

[0070] The guide rail c 53 is installed on the guide rail mounting plate 46;

[0071] The PLC control module controls the actions of the servo adjustment assembly a 2, the R bending machine 3, and the L bending machine 4.

[0072] Reference Figure 1 、 Figure 2 Before the workpiece enters this mechanism, start the servo adjustment assembly a 2 to drive the R bending machine 3 and the L bending machine 4 respectively screwed to its lead screw nut seat to move horizontally in a straight line along the guide rail a 5 through the slider a 6 installed on its bottom surface until the R bending machines 3 on both sides are centered and positioned with the L bending machine 4.

[0073] ReferenceFigure 1 , Figure 2 , Figure 8 and Figure 9 , the stainless steel outer cover of the range hood needs to be transported to this mechanism from the previous station. When entering this mechanism, first, the sheet metal guide plate 51 installed on the side positioning component 11 guides the workpiece in, then the cushion knife 8 installed on the frame 7 supports the workpiece, and finally, the workpiece is pushed to stop at the front positioning plate 48 to complete the front positioning of the workpiece. Subsequently, start the two-side servo component c 44, drive the positioning roller 49 and the hinge component 50 on the side positioning mounting plate 45 screwed to its lead screw nut to move horizontally along the guide rail c 53 via the slider c 52 installed on its bottom surface until the positioning roller 49 abuts against the end folded vertical edge of the workpiece and the hinge component 50 supports the end folded labyrinth edge of the workpiece to complete the centering positioning of the workpiece, that is, two-way side positioning.

[0074] Reference Figure 3 , Figure 4 , before the workpiece enters this mechanism, the gap adjustment component 10, according to different product models, starts the servo component b 23, and by adjusting the up and down positions of the connecting wedge block 24 screwed to its lead screw nut, further pushes the adjustment wedge block 38 on the bending execution component 27, so that the position of the bending die 42 on the bending die component 28 is adjusted in the horizontal direction to achieve the adjustment of the die gap, thereby meeting products of different thicknesses.

[0075] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 , for the bending pressure application component 9, make its oil cylinder 12 work. In the first half of the stroke, it presses downward until the pressure plate 22 contacts the upper surface of the workpiece. Since the cushion knife 8 supports the middle of the workpiece, the pressure plate 22 cannot continue to move downward, causing the special spring 21 to play a role. Under the guidance of the special screw 20, the pressure plate 22 stops pressing on the surface of the workpiece; at this time, the stroke of the oil cylinder 12 has not finished, and it continues the second half of the stroke and continues to move downward, driving the pressure roller 19 to apply pressure to the bending die 42. The two-side bending dies 42 press the workpiece downward to complete the 90-degree R1 bending on both sides. After forming, the oil cylinder 12 retracts the cylinder rod and stops working. At this point, the workpiece has been bent into a U shape. During bending, the side positioning component 11 does not return to the initial position, and the downward bending force drives the hinge shaft 54 of the hinge component 50 to rotate. After bending and forming, the hinge shaft 54 returns to the horizontal position by its own gravity. At this point, the bending on both sides is completed, and it is grabbed by the next station for blanking.

[0076] The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0077] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sharp-angle bending mechanism for adjustable sheet metal thickness, characterized in that Including: Bed body (1), servo adjustment component a (2), R bending machine (3), L bending machine (4), PLC control module; The R bending machine (3) and the L bending machine (4) are mirror parts of each other and are symmetrically arranged on both sides of the bed body (1). The servo adjustment component a (2) drives the R bending machine (3) and the L bending machine (4) to move linearly along the guide rail a (5); The R bending machine (3) includes a frame (7), a padding knife (8), a bending pressure application component (9), a gap adjustment component (10), and a side positioning component (11), The bending pressure application component (9) includes an oil cylinder (12), a template (16), a pressure roller (19), a screw (20), a spring (21), and a pressure plate (22), The template (16) is connected to the frame (7) through a guide pillar and bushing (13); an oil cylinder (12) is connected to the template (16), and a spring (21) and a pressure roller (19) are connected to the lower surface of the template (16); The screw (20) passes through the light hole on the template (16) and is screwed to the pressure plate (22); The padding knife (8) is connected to the frame (7) and is located below the pressure plate (22); The gap adjustment component (10) includes a servo component b (23), a connecting wedge block (24), a limiting component (25), a mounting plate (26), a bending execution component (27), a bending die component (28), and a limiting block (29), The connecting wedge block (24) is connected to the servo component b (23) through a lead screw nut seat; the limiting component (25) is connected between the servo component b (23) and the mounting plate (26); The mounting plate (26) is mounted on the frame (7); The bending execution component (27) includes a horizontal pressing strip (32), a vertical pressing strip (34), an adjustment top plate (35), a setscrew (36), an adjustment pad shaft (37), an adjustment wedge block (38), and an adjustment block (39). Among them, the horizontal pressing strip (32) and the vertical pressing strip (34) are both screwed to the mounting plate (26); the adjustment top plate (35) is mounted on the mounting plate (26); the setscrew (36) passes through the adjustment top plate (35) and is connected to the adjustment block (39); the adjustment pad shaft (37) is mounted between the adjustment top plate (35) and the adjustment block (39); the adjustment wedge block (38) is connected to the adjustment block (39); the adjustment block (39) is pressed on the mounting plate (26) through the horizontal pressing strip (32); the connecting wedge block (24) moves downward to squeeze the adjustment wedge block (38) and push the adjustment block (39) to move horizontally; The bending die component (28) is pressed on the adjustment block (39) through the vertical pressing strip (34); The limiting block (29) is screwed to the adjustment block (39); the side positioning component (11) is mounted on the side of the frame (7); The PLC control module controls the actions of the servo adjustment component a (2), the R bending machine (3), and the L bending machine (4).

2. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 1, wherein The nut seat in the servo adjustment assembly a (2) is screwed to the bottom plates of the R bending machine (3) and the L bending machine (4) respectively, so as to drive the R bending machine (3) and the L bending machine (4) to perform linear motion along the guide rail a (5) via a slider a (6) installed on the bottom surface thereof.

3. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 1, wherein The bending pressure assembly (9) also includes a guide column and guide sleeve (13), a cylinder connecting plate (14), a pressure block (15), a pressure roller connecting block (17), a pressure roller copper sleeve (18), and a pressure roller (19). The pressure roller copper sleeve (18) is installed on both sides of the pressure roller (19), and the pressure roller connecting block (17) is installed on the pressure roller copper sleeve (18), and the pressure roller connecting block (17) is screwed to the lower surface of the template (16); The guide pillar and guide sleeve (13) and the guide sleeve parts are all screwed and installed on the frame (7), and the guide pillar and guide sleeve (13) and the guide pillar parts are screwed on the upper surface of the template (16); The oil cylinder (12) is fixed on the oil cylinder connecting plate (14), and the pressing block (15) fixes the oil cylinder connecting plate (14) on the upper surface of the template (16).

4. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 1, wherein The limiting assembly (25) comprises a limiting shaft (30) and a limiting flange seat (31); one end of the limiting shaft (30) is screwed to the servo assembly b (23), and the other end is connected to the mounting plate (26) via the limiting flange seat (31).

5. The sharp-corner bending mechanism for adjustable sheet metal thickness according to claim 1, wherein The mounting plate (26) is also connected to a wear-resistant plate (33).

6. The corner bending mechanism for adjustable sheet metal thickness according to claim 1, characterized in that, The adjusting top plate (35) is mounted on the mounting plate (26) by being embedded therein; the top screw (36) is screwed to the adjusting block (39) through the light hole of the adjusting top plate (35).

7. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 1, characterized in that The bending die assembly (28) comprises a discharge spring (40), a spring guide column (41), a bending die (42), and a guide column connecting block (43), wherein the discharge spring (40) is mounted on the spring guide column (41); the spring guide column (41) is mounted on the guide column connecting block (43); the bending die (42) is pressed onto the adjustment block (39) via a vertical pressure strip (34); and the guide column connecting block (43) is screwed onto the bending die (42).

8. The sharp angle bending mechanism for adjustable sheet metal thickness according to claim 1, characterized in that, The side positioning assembly (11) comprises a servo assembly c (44), a side positioning mounting plate (45), a side positioning bottom plate (47), a front positioning plate (48), a positioning roller (49), a hinge assembly (50), and a sheet material guide plate (51). The servo assembly c (44) is mounted on the side positioning base plate (47), and its nut seat is screwed with the side positioning mounting plate (45), driving the side positioning mounting plate (45) to slide; A front positioning plate (48), a positioning roller (49), a hinge assembly (50) and a sheet material guide plate (51) are installed on the side positioning mounting plate (45). The side positioning base plate (47) is mounted on the frame (7).

9. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 8, characterized in that, The hinge assembly (50) includes a hinge shaft (54), a hinge mounting plate (55), and a pin shaft (56), wherein the hinge shaft (54) is mounted on the hinge mounting plate (55) via the pin shaft (56).

10. The sharp-angle bending mechanism for adjustable sheet metal thickness according to claim 8, characterized in that, The side positioning assembly (11) further comprises a guide rail mounting plate (46), a slider c (52), and a guide rail c (53). The bottom surface of the side positioning mounting plate (45) is mounted with a slider c (52), and the slider c (52) moves linearly along the guide rail c (53); The guide rail c (53) is mounted on the guide rail mounting plate (46); The guide rail mounting plate (46) is mounted on both sides of the side positioning bottom plate (47).

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