Device for finely adjusting the bending angle of thin metal sheets

Abstract

The purpose of this utility model is to disclose a device for finely adjusting the bending angle of a thin metal sheet, relating to the field of thin metal sheet bending technology. It includes an upper die assembly, a stripping assembly, and a lower die assembly. The upper die assembly includes a punch and a punch fixing block. The punch fixing block has an arc-shaped groove. The top of the punch has a spherical column head that is oscillatingly mounted in the arc-shaped groove. The bottom of the punch has a horizontal guide post that rotates. The top of the forming block has a clearance portion with a bending inclined surface. The first end of an L-shaped fine-tuning block is inserted into a transmission fine-tuning block and engages with it through a first inclined surface. The bottom of the transmission fine-tuning block has a second inclined surface, and the bottom of the punch has a third inclined surface. The second end of the L-shaped fine-tuning block has a fine-tuning screw. The technical effect is that when the bending angle of the thin metal sheet needs to be finely adjusted, rotating the fine-tuning screw causes the first inclined surface to drive the transmission fine-tuning block to move slightly up and down. Then, the second and third inclined surfaces engage to drive the punch to oscillate slightly, thus achieving fine-tuning of the bending angle of the thin metal sheet.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet bending technology, and in particular to a device for finely adjusting the bending angle of metal sheets. Background Technology

[0002] With the rapid development of 3C electronics and precision machining, the shapes of metal sheets are diverse. When metal sheets need to be bent at 90°, due to issues such as processing accuracy, assembly accuracy, and wear, it is difficult to ensure that the 90° bend is always formed during the bending process. This leads to the need for frequent maintenance and adjustment of the bending device, and even replacement of the bending punch, which affects bending efficiency.

[0003] In view of this, it is necessary to develop a device that can finely adjust the bending angle of a thin metal sheet. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to disclose a device for finely adjusting the bending angle of a metal sheet.

[0005] To achieve the above-mentioned objectives, this invention provides a device for finely adjusting the bending angle of a metal sheet, comprising an upper die assembly, a stripping assembly, and a lower die assembly;

[0006] The upper mold assembly includes a punch and a punch fixing block. The punch fixing block is provided with an arc groove. The top of the punch is provided with a spherical column head that is oscillatingly mounted in the arc groove. The bottom of the punch is provided with a horizontal guide post that rotates.

[0007] The lower mold assembly includes a lower template, a fixing block, and a forming block. The top of the forming block is provided with a clearance portion, and the clearance portion is provided with a bending slope.

[0008] The stripping assembly includes a stripping plate, a stop plate, an L-shaped fine-tuning block, and a transmission fine-tuning block. The first end of the L-shaped fine-tuning block is inserted into the transmission fine-tuning block and engages with it through a first inclined surface. A second inclined surface is provided at the bottom of the transmission fine-tuning block, and a third inclined surface is provided at the bottom of the punch. The second inclined surface and the third inclined surface engage with each other.

[0009] The second end of the L-shaped fine-tuning block is provided with a fine-tuning screw, which abuts against the stripping plate.

[0010] Preferably, rotating the fine-tuning screw causes the L-shaped fine-tuning block and the transmission fine-tuning block to cooperate in driving the punch to oscillate.

[0011] Preferably, the horizontal guide post is close to or far from the bend slope.

[0012] Preferably, during the downward punching process, the horizontal guide post abuts against the metal sheet and bends it to the bending slope.

[0013] Preferably, during the return stroke of the punch, the metal sheet springs back to a 90° bent state.

[0014] Preferably, a fastening bolt is provided on the top of the transmission fine-tuning block, and the fastening bolt passes through the transmission fine-tuning block and abuts against the first inclined surface.

[0015] Preferably, a horizontal guide rod is provided at the second end of the L-shaped fine-tuning block, and the horizontal guide rod is installed on the stripping plate.

[0016] Preferably, the transmission fine-tuning block is mounted to the stop plate by the fastening bolt.

[0017] Preferably, the stop plate is provided with a groove, which accommodates the horizontal part of the L-shaped fine-tuning block.

[0018] Preferably, the fine-tuning screw is exposed.

[0019] Compared with the prior art, the technical effects of this utility model are as follows:

[0020] The punch of this invention is oscillatingly mounted on the arc groove via a spherical head. When it is necessary to finely adjust the bending angle of the metal sheet, the fine-adjustment screw is rotated, and the first inclined plane drives the transmission fine-adjustment block to move up and down slightly. Then, the second and third inclined planes cooperate to drive the punch to oscillate slightly, thereby realizing the fine adjustment of the distance between the horizontal guide post and the bending inclined plane, and realizing the fine adjustment of the bending angle of the metal sheet. The adjustment is convenient and efficient. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the punch in the return state of the device for finely adjusting the bending angle of a thin metal sheet according to this utility model.

[0023] Figure 2 This is a utility model Figure 1 A magnified structural diagram at point A.

[0024] Figure 3 This is a schematic diagram of the punch in the downward punching state of the device for finely adjusting the bending angle of a thin metal sheet according to this utility model.

[0025] Figure 4 This is a utility model Figure 3 A magnified structural diagram at point B.

[0026] Figure 5 is a schematic perspective view of the punch, L-shaped fine adjustment block and transmission fine adjustment block of the utility model.

[0027] wherein, 1, upper die assembly; 11, punch; 111, spherical column head; 112, horizontal guide post; 113, third inclined surface; 12, punch fixing block; 121, arc groove; 2, stripper assembly; 21, stripper plate; 22, stop plate; 23, L-shaped fine adjustment block; 231, first end; 232, first inclined surface; 233, second end; 234, fine adjustment screw rod; 235, horizontal guide rod; 236, horizontal part; 24, transmission fine adjustment block; 241, second inclined surface; 242, fastening bolt; 3, lower die assembly; 31, lower die plate; 32, fixing block; 33, forming block; 331, avoidance part; 332, bending inclined surface; 4, metal sheet. Detailed Description of Embodiments

[0028] The utility model will be described in detail below with reference to the embodiments shown in the accompanying drawings. It should be noted that these embodiments do not limit the utility model, and any equivalent changes or substitutions in functions, methods or structures made by those skilled in the art according to these embodiments fall within the protection scope of the utility model.

[0029] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and other directional or positional terms are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the utility model.

[0030] Example 1

[0031] Reference Figures 1 to 5 as shown, the present embodiment discloses a specific embodiment of a device capable of finely adjusting the bending angle of a metal sheet.

[0032] the present embodiment provides a device capable of finely adjusting the bending angle of a metal sheet, reference Figures 1 to 5As shown, it includes an upper die assembly 1, a stripping assembly 2, and a lower die assembly 3; the upper die assembly 1 includes a punch 11 and a punch fixing block 12, the punch fixing block 12 is provided with an arc groove 121, the top of the punch 11 is provided with a spherical column head 111 that is oscillatingly mounted on the arc groove 121, and the bottom of the punch 11 is rotatably provided with a horizontal guide post 112; the lower die assembly 3 includes a lower template 31, a fixing block 32, and a forming block 33, the top of the forming block 33 is provided with a relief part 331, and the relief part 331 is provided with a bending inclined surface 332; The stripping assembly 2 includes a stripping plate 21, a stop plate 22, an L-shaped fine-tuning block 23, and a transmission fine-tuning block 24. The first end 231 of the L-shaped fine-tuning block 23 is inserted into the transmission fine-tuning block 24 and engages with it through a first inclined surface 232. The bottom of the transmission fine-tuning block 24 is provided with a second inclined surface 241, and the bottom of the punch 11 is provided with a third inclined surface 113. The second inclined surface 241 and the third inclined surface 113 engage with each other. The second end 233 of the L-shaped fine-tuning block 23 is provided with a fine-tuning screw 234, which abuts against the side wall of the stripping plate 21.

[0033] Specifically, see Figures 1 to 5 The working principle of this embodiment is as follows: during the downward punching process, the punch 11 drives the horizontal guide post 112 downward. The horizontal guide post 112 contacts (presses against) the metal sheet 4 to be bent and bends it to the bending slope 332. After the punch 11 returns, the metal sheet 4 springs back to the bent 90° state, completing the bending. During the bending process, the horizontal guide post 112 and the metal sheet 4 are in rolling contact, which can bend the metal sheet 4 with a thickness of 1.5mm-2mm without scratching the surface of the metal sheet 4.

[0034] See Figures 1 to 5 When the bending angle formed by bending the metal sheet 4 is less than 90°, the fine-tuning screw 234 is rotated in the first direction. The L-shaped fine-tuning block 23 drives the transmission fine-tuning block to move slightly upward through the first inclined surface 232. Then, through the cooperation of the second inclined surface 241 and the third inclined surface 113, the punch 11 is driven to approach the bending inclined surface 332, thereby slightly reducing the distance between the horizontal guide post 112 and the bending inclined surface. This allows the punch 11 to swing slightly to the right until the bending angle formed by bending the metal sheet 4 is 90°.

[0035] See Figures 1 to 5 When the bending angle formed by bending the metal sheet 4 exceeds 90°, the fine-tuning screw 234 is rotated in the opposite direction of the first direction. The L-shaped fine-tuning block 23 drives the transmission fine-tuning block to move slightly downward through the first inclined surface 232. Then, through the cooperation of the second inclined surface 241 and the third inclined surface 113, the punch 11 is driven away from the bending inclined surface 332, thereby slightly increasing the distance between the horizontal guide post 112 and the bending inclined surface, so that the punch 11 can swing slightly to the left until the bending angle formed by bending the metal sheet 4 is 90°.

[0036] See Figures 1 to 5 To ensure the stability of the fit between the L-shaped fine-tuning block 23 and the transmission fine-tuning block 24, a fastening bolt 242 is provided on the top of the transmission fine-tuning block 24. The fastening bolt 242 passes through the transmission fine-tuning block 24 and abuts against the first inclined surface 232. A horizontal guide rod 235 is provided at the second end 233 of the L-shaped fine-tuning block 23. The horizontal guide rod 235 is installed on the stripper plate 21. The transmission fine-tuning block 24 is installed on the stop plate 22 by the fastening bolt 242. The stop plate is provided with a groove that accommodates the horizontal part 236 of the L-shaped fine-tuning block 23. The fine-tuning screw 234 is exposed for manual adjustment. When it is necessary to adjust the bending angle of the metal sheet 4, the fastening bolt 242 is loosened first, and then the fine-tuning screw 234 is manually rotated. The L-shaped fine-tuning block 23 moves slightly along the horizontal guide rod 235, thereby realizing the slight oscillation of the punch 11, and thus realizing the adjustment of the bending angle of the metal sheet 4.

[0037] In this embodiment, the punch 11 is oscillatingly mounted on the arc groove 121 via the spherical head 111. When it is necessary to finely adjust the bending angle of the metal sheet 4, the fine-adjustment screw 234 is rotated, and the first inclined surface 232 drives the transmission fine-adjustment block 24 to move up and down slightly. Then, the second inclined surface 241 and the third inclined surface 113 cooperate to drive the punch 11 to swing slightly, thereby realizing the fine adjustment of the distance between the horizontal guide post 112 and the bending inclined surface 332, and realizing the fine adjustment of the bending angle of the metal sheet 4. The adjustment is convenient and efficient.

Claims

1. A device for finely adjusting the bending angle of a thin metal sheet, characterized in that, Includes upper mold assembly, stripper assembly, and lower mold assembly; The upper mold assembly includes a punch and a punch fixing block. The punch fixing block is provided with an arc groove. The top of the punch is provided with a spherical column head that is oscillatingly mounted in the arc groove. The bottom of the punch is provided with a horizontal guide post that rotates. The lower mold assembly includes a lower template, a fixing block, and a forming block. The top of the forming block is provided with a clearance portion, and the clearance portion is provided with a bending slope. The stripping assembly includes a stripping plate, a stop plate, an L-shaped fine-tuning block, and a transmission fine-tuning block. The first end of the L-shaped fine-tuning block is inserted into the transmission fine-tuning block and engages with it through a first inclined surface. A second inclined surface is provided at the bottom of the transmission fine-tuning block, and a third inclined surface is provided at the bottom of the punch. The second inclined surface and the third inclined surface engage with each other. The second end of the L-shaped fine-tuning block is provided with a fine-tuning screw, which abuts against the stripping plate.

2. The device for finely adjusting the bending angle of a metal sheet as described in claim 1, characterized in that, Rotating the fine-tuning screw causes the L-shaped fine-tuning block and the transmission fine-tuning block to work together to drive the punch to swing.

3. The device for finely adjusting the bending angle of a metal sheet as described in claim 2, characterized in that, The horizontal guide post is located near or away from the bend slope.

4. The device for finely adjusting the bending angle of a metal sheet as described in any one of claims 1-3, characterized in that, During the downward punching process, the horizontal guide post abuts against the metal sheet and bends it to the bending slope.

5. The device for finely adjusting the bending angle of a metal sheet as described in claim 4, characterized in that, During the return stroke of the punch, the metal sheet springs back to a 90° bent state.

6. The device for finely adjusting the bending angle of a metal sheet as described in claim 4, characterized in that, A fastening bolt is provided on the top of the transmission fine-tuning block, and the fastening bolt passes through the transmission fine-tuning block and abuts against the first inclined surface.

7. The device for finely adjusting the bending angle of a metal sheet as described in claim 4, characterized in that, A horizontal guide rod is provided at the second end of the L-shaped fine-tuning block, and the horizontal guide rod is installed on the stripping plate.

8. The device for finely adjusting the bending angle of a metal sheet as described in claim 6, characterized in that, The transmission fine-tuning block is mounted to the stop plate by the fastening bolts.

9. The device for finely adjusting the bending angle of a metal sheet as described in claim 8, characterized in that, The stop plate is provided with a groove, which accommodates the horizontal part of the L-shaped fine-tuning block.

10. The device for finely adjusting the bending angle of a metal sheet as described in claim 4, characterized in that, The fine-tuning lead screw is exposed.

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