A device and method for multi-angle sheet metal forming

Abstract

The application discloses a device and method for multi-angle sheet metal forming, which comprises four parts: module 1, clamping plate 2, fixing bolt 3 and locking nut 4. The device and method are used for solving the problems of multiple corrections and multiple clamping caused by springback and reverse concave of the elastic deformation of the parts in the forming process of the angular sheet metal parts, solving the angle limitation problem caused by the conventional angle bar forming device in the forming process of the parts, simplifying the manufacturing process of the parts and shortening the manufacturing cycle of the parts. The device can reduce the problems of multiple corrections and multiple clamping caused by the springback and reverse concave of the parts, can form the angle bar with a small angle, can realize the one-time forming work of the parts with various angles on the same device, can reduce the types of the forming devices, is simple to operate and convenient to use, can improve the production efficiency of the parts, can improve the forming angle range of the parts and can increase the use range of the device.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal parts manufacturing technology, and relates to an apparatus and method for multi-angle sheet metal forming. Background Technology

[0002] There are many methods for bending sheet metal, among which manual bending is the most common and requires a high level of skill from the operator. The standard manual forming steps for angular parts in sheet metal manufacturing are as follows:

[0003] 1. Calculate the unfolded dimensions of the part and cut it into blanks, then draw the bending center line;

[0004] 2. Prepare two modules or gauges with a length greater than the length of the part and a radius (R) that matches the length of the part;

[0005] 3. Clamp the raw material between two modules or gauges, align the bending centerline with the R center of the module or gauge, and tap the material with a rubber or wooden board to make it fit the module or gauge.

[0006] 4. Use a wooden mallet and a wooden point to evenly tap the R section from beginning to end to ensure that the material is fully bonded to the module or gauge.

[0007] 5. To eliminate springback, remove the part from the module or gauge, then use a wooden point at a 45° angle to gently tap the wooden point with a wooden hammer at the R-angle of the part, so that the R-angle is fully in contact with the module or gauge.

[0008] 6. To eliminate the concave shape of the parts, place the angular parts on a platform and use a rubber tampon to flatten the inner surface of the bent edge;

[0009] 7. Next, clamp the part in the module or gauge, and tap the part with a rubber beater to make the part fully fit with the module or gauge.

[0010] During the forming process of angular parts, the parts spring back, and the parts are prone to deformation when the R-angle is tapped on the platform with a wooden point. The parts need to be leveled a second time. After leveling, they still need to be corrected again using modules or gauges, making the forming process cumbersome.

[0011] In the manual forming process of angular sheet metal parts, two right-angle modules or gauge irons are used as forming jigs for forming. The forming angle of the parts is limited, and only angular parts with an angle between 90° and 180° can be manufactured. Furthermore, after the parts are initially formed, they need to be corrected a second time, and the angle and height of the parts cannot be guaranteed during the correction process. Summary of the Invention

[0012] The technical problem solved by this invention: This invention provides an apparatus and method for multi-angle sheet metal forming, aiming to solve the problem of multiple corrections and clamping caused by springback and concavity due to elastic deformation of the parts during the forming process of angular sheet metal parts. It also addresses the angle limitations imposed by universal angle forming devices (one forming device can only correspond to one type of angle material), simplifies the part manufacturing process, shortens manufacturing time, reduces the number of forming devices, and lowers costs. Furthermore, it ensures consistent height of the clamping parts during the tapping process with wooden tips, improves production efficiency, and increases the applicability of the module. This invention provides a forming apparatus and processing method for angular sheet metal parts.

[0013] The technical solution of this invention:

[0014] On one hand, the present invention provides an apparatus for multi-angle sheet metal forming, the apparatus comprising: template 1, clamping plate 2, fixing bolt 3, and locking nut 4;

[0015] Template 1 and clamping plate 2 are of the same length. Template 1 has a first hole at both ends, and clamping plate 2 has a second hole at the position corresponding to the hole on template 1.

[0016] The template 1 and the clamping plate 2 are bolted together by passing the fixing bolt 3 through the first hole and the second hole and tightening the fixing bolt 3 with the lock nut 4.

[0017] Furthermore, module 1 adopts an L-shaped structure, with the non-working edge R1 rounded, the perpendicularity of the two working surfaces ≤0.01mm, the surface finish of the working surfaces ≤Ra0.8, and the R angle 6 set according to the R angle of the part, used for forming the R angle of the part. The corner material formed by R angle 6 can achieve one-time forming of corner material with a greater than 90°.

[0018] Furthermore, the clamping plate 2 adopts a flat plate structure with a rounded corner step at the top. The R-angle 8 of the rounded corner step is set according to the R-angle of the part and is used to form the R-angle of the part.

[0019] Furthermore, the lengths of the template 1 and the clamping plate 2 are designed according to the length of the part, and both ends of the template 1 and the clamping plate 2 are 30mm longer than both ends of the part.

[0020] Furthermore, the first hole and the second hole are respectively opened at the ends of the template 1 and the clamping plate 2, which are longer than the ends of the parts.

[0021] Furthermore, the upper end face of the R-angle 6 of module 1 is flush with the high point of the R-angle 8 of clamping plate 2.

[0022] Furthermore, the rounded corner step shape at the upper end of the clamping plate 2 allows for the forming of parts that can be bent at any angle.

[0023] On the other hand, the present invention also provides a method for multi-angle sheet metal forming, the method being implemented using the aforementioned apparatus, wherein the part is an angular sheet metal part, and the method comprising:

[0024] During the forming process of the angular sheet metal part, the bending center line is drawn on the angular sheet metal part material. Then, the angular sheet metal part material is clamped between module 1 and clamping plate 2, so that the bending center line is aligned with the center of the R angle 8 of clamping plate 2. A bakelite flat plate is used to support the back of the bending part of the angular sheet metal part material, and a rubber beater is used to pat the part of the angular sheet metal part material that needs to be bent. Then, a wooden mallet and a wooden point are used to evenly tap the R part of the angular sheet metal part material from beginning to end, so that the R angle of the angular sheet metal part material is fully aligned with the R angle 8 of clamping plate 2. An angle gauge is used to check the forming angle of the angular sheet metal part material. Finally, the connecting bolts 3 are removed and the angular sheet metal part is taken out.

[0025] This invention provides an apparatus and method for multi-angle sheet metal forming, comprising four parts: module 1, clamping plate 2, fixing bolts 3, and locking nut 4. This invention's apparatus can complete the clamping and trimming of angle metal in a single operation, is suitable for trimming at multiple angles, reduces the need for multiple corrections and clamping due to part springback and denting, is simple to operate and convenient to use, simplifies the part manufacturing process, shortens the part manufacturing cycle, improves part production efficiency, ensures consistent height of the clamping parts, increases the forming angle range of the parts, and enhances the applicability of the module. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a device for multi-angle sheet metal forming;

[0027] Figure 2 This is a schematic diagram of a device module 1 for multi-angle sheet metal forming;

[0028] Figure 3 A schematic diagram of a clamping plate 2 for multi-angle sheet metal forming;

[0029] Figure 4 This is a schematic diagram of the working process of a device used for multi-angle sheet metal forming;

[0030] Figure 5 This is a schematic diagram of the forming process of a device used for multi-angle sheet metal forming;

[0031] Among them: 1-module, 2-clamping plate, 3-fixing bolt, 4-locking nut, 5-angle material. Detailed Implementation

[0032] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] This invention provides an apparatus and method for sheet metal forming at multiple angles, such as... Figure 1 As shown, it consists of four parts: module 1, clamping plate 2, fixing bolt 3, and locking nut 4.

[0034] When using the device of the present invention, after the plate is clamped and attached to the forming device, align it with the bending line and use a rubber mallet to strike the back of the plate. The protruding part of the plate bends along the bending line. Use a universal angle gauge to measure the angle of the formed corner piece. When the angle is close to the required angle, use a bakelite board to tap and repair it against the bending line until the angle reaches the required angle, thus completing the forming of the corner sheet metal.

[0035] like Figure 2 and 3 As shown, module 1 adopts an L-shaped structure and is made of 316 stainless steel. The non-working edges R1 are rounded, and the perpendicularity of the two working surfaces is ≤0.01mm, which can ensure the accuracy of the angle forming measurement. The surface finish of the working surfaces is ≤Ra0.8, which ensures the reliability of part clamping and measurement. The R angle 6 of the clamping plate 2 is set according to the R angle of the part and is used for forming the R angle of the part. The angle formed by R angle 6 can achieve one-time forming of angles greater than 90°. Module 1 has connecting holes 5 at both ends, with a diameter of φ5H7. The inlet end has a 1x45° chamfer to facilitate the passage of positioning bolts. Clamping plate 2 adopts a flat plate structure and is made of 316 stainless steel. The surface finish of the working surface is ≤Ra0.8 to ensure the reliability of part clamping and measurement. It also has connecting holes 7 at both ends, with a diameter of φ5H7 and a 1x45° chamfer at the inlet end to facilitate the passage of positioning bolts. The connecting holes 7 are matched with the connecting holes 5 on module 1 to ensure that the end faces of module 1 and clamping plate 2 are flush. The R-angle 8 is set according to the R-angle of the part and is used for forming the R-angle of the part. The angle formed by R-angle 8 can achieve one-time forming of angles less than 90°, eliminating the need for secondary shaping and saving production cycle. The fixing bolt 3 has a diameter of φ5, and its length is selected according to the thickness of module 1 and clamping plate 2. The fit between this bolt and connecting holes 5 and 7 is a small clearance fit to avoid misalignment of the bending line of the angled part due to the shaking of the fixing bolt, and to reduce the error caused by secondary repair. The locking nut 4 is an M5 process nut that is welded to the outlet of the connection hole of module 1, ensuring that the coaxiality of the two axes is ≤0.01mm, so that the fixing bolt can be easily screwed in or out.

[0036] In the device of the present invention, the clamping plate 2 avoids the limitation on the surface of the angle material during the forming process, and can hammer the angled parts to the specified angle in one clamping process, avoiding deformation and misalignment of bending lines caused by secondary hammering.

[0037] Combined with appendix Figure 4-5A forming device and method for angular sheet metal parts are provided. The length of the device is designed according to the length of the part, and two φ5H7 connecting holes 5 and 7 are set at both ends according to the length of the part. The module 1 and the clamping plate 2 are connected by fixing bolts 3 and locking nuts 4.

[0038] During the forming process of the angular sheet metal parts, after drawing the bending center line on the material, the material is clamped between module 1 and clamping plate 2, so that the bending center line is aligned with the R center of clamping plate 2. A bakelite flat plate is used to support the back of the material at the bending part, and a rubber beater is used to pat the part of the material to be bent. Then, a wooden mallet and a wooden point are used to evenly tap the R part from beginning to end, so that the R angle of the part is fully in contact with the R angle of clamping plate 2. An angle gauge is used to check the forming angle of the part. Finally, the connecting bolts 3 are removed and the part is taken out.

[0039] The specific operating steps are as follows:

[0040] 1. Manufacturing the parts in the device of this invention

[0041] Manufacture module 1 and clamping plate 2 of the invention device in accordance with the technical specifications and design drawings;

[0042] 2. Assemble the device of the present invention.

[0043] Clamp the plates of module 1 and clamping plate 2 together, ensuring that the high point of R-8 is flush with the upper end of R-6. Use a bow-shaped clamp to tighten them. Configure the connection hole φ5H7 according to the assembly drawings and technical conditions. Then, use fixing bolts 3 and locking nuts 4 to connect module 1 and clamping plate 2. The mating surfaces of module 1 and locking nuts 4 can be welded together to form a whole, which can reduce the workload during clamping and loosening and improve work efficiency.

[0044] 3. Feeding

[0045] Based on the parameters in the design drawings, the unfolded length of the sheet metal is calculated using an arbitrary angle calculation formula. The unfolded material is then cut according to its dimensions, and burrs are removed to prevent cracks caused by edge burrs.

[0046] 4. Calculate the bending line dimensions of the part and draw the bending center line.

[0047] 5. Clamp the material between module 1 and clamping plate 2, aligning the bending centerline with the R center of clamping plate 2. Use a bakelite flat plate to support the back of the material at the bending point and tap the material with a rubber or wooden board.

[0048] 6. Use a wooden mallet and a wooden point to evenly tap the R-angle from beginning to end, so that the R-angle of the part is fully aligned with the R-angle of the clamp 2.

[0049] 7. Use an angle gauge to check the forming angle of the part. After the angle is qualified, remove the connecting bolt 3, take out the formed part, and complete the forming work of the sheet metal angle.

Claims

1. An apparatus for multi-angle sheet metal forming, characterized in that, The device includes: module (1), clamp (2), fixing bolt (3), and locking nut (4); The module (1) and the clamp (2) are the same length. The first hole is opened at both ends of the module (1), and the second hole is opened at the position corresponding to the opening on the module (1) in the clamp (2). The module (1) and the clamp (2) are bolted together by passing the fixing bolt (3) through the first hole and the second hole and locking the fixing bolt (3) with the lock nut (4); Module (1) adopts an L-shaped structure, with the non-working edge R1 rounded, the perpendicularity of the two working surfaces ≯0.01mm, the smoothness of the working surfaces ≯Ra0.8, and the R angle is set according to the R angle of the part, which is used for the forming of the R angle of the part. The corner material formed by the R angle can achieve one-time forming of corner material with a greater than 90° angle. The clamp (2) adopts a flat plate structure with a rounded corner step at the top. The R-angle of the rounded corner step is set according to the R-angle of the part and is used for forming the R-angle of the part. A method for multi-angle sheet metal forming using the aforementioned apparatus, wherein the part is an angular sheet metal part, the method includes: During the forming process of the angular sheet metal parts, the bending center line is drawn on the angular sheet metal part material. Then, the angular sheet metal part material is clamped between the module (1) and the clamping plate (2) so that the bending center line is aligned with the center of the R-angle of the clamping plate (2). The back of the bending part of the angular sheet metal part material is supported by a bakelite flat plate and the part to be bent is patted with a rubber slap. Then, the R-angle of the angular sheet metal part material is evenly tapped from beginning to end with a wooden mallet and a wooden point so that the R-angle of the angular sheet metal part material is fully aligned with the R-angle of the clamping plate (2). The forming angle of the angular sheet metal part material is checked with an angle ruler. Finally, the fixing bolts (3) are removed and the angular sheet metal part is taken out.

2. The apparatus for multi-angle sheet metal forming according to claim 1, characterized in that, The lengths of the module (1) and the clamping plate (2) are designed according to the length of the part, and the two ends of the module (1) and the clamping plate (2) are 30mm longer than the two ends of the part.

3. The apparatus for multi-angle sheet metal forming according to claim 2, characterized in that, The first hole and the second hole are respectively opened at both ends of the module (1) and the clamp (2) where they extend beyond the ends of the parts.

4. The apparatus for multi-angle sheet metal forming according to claim 3, characterized in that, The upper end face of the R-angle of module (1) is aligned with the high point of the R-angle of clamp (2).

5. The apparatus for multi-angle sheet metal forming according to claim 4, characterized in that, The rounded step shape at the top of the clamp (2) allows for the forming of parts that can be bent at any angle.

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