Product bending process and product processing process

Abstract

The invention discloses a product bending process and a product machining process, and the product bending process comprises the following steps: machining a stress sub-hole: machining at least one stress sub-hole in the length direction of a to-be-bent part on a plate, and dividing the to-be-bent part into at least two sections; and bending is conducted, specifically, based on the to-be-bent position, the plate is bent to form a first side wall, a second side wall and a bent part located between the first side wall and the second side wall of the product. According to the product bending process provided by the embodiment of the invention, the at least one stress dividing hole is machined in the rectangular direction of the to-be-bent part before the bending procedure, so that the stress at the bent part can be broken and dispersed, and the internal stress of the plate is released; the bending position is divided into at least two sections through at least one stress branch hole, local stress edges are more fully concentrated when the plate is bent, product size forming is more accurate, the straightness of the bending portion can be increased, the production yield is increased to 100%, and the product size tolerance is met so as to meet the use requirements of customers.

Description

Technical Field

[0001] The present invention relates to the technical field of product bending, and in particular to a product bending process and a product processing process. Background Art

[0002] When a 0.1-0.3mm thin metal part is bent for an extra-long length of 50-200mm, the bending length is too long, which causes a large stress deformation in the product to be hidden in the material and cannot be released. As a result, the side wall of the stamped bending edge will produce a large arc distortion, resulting in poor dimensional tolerance and the product function cannot meet customer requirements.

[0003] Traditional technical means reduce stress deformation and arc distortion by improving the pressure parameters of high-hardness stamping punch parts and machine molds, but the effect is limited, the product defect rate is still as high as 60%, and the output yield is low. Due to the complex factors involved in the bending process, simply adjusting these parameters is often difficult to fully solve the problem. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a product bending process and a product processing process that can improve bending straightness, prevent product distortion and deformation, and improve bending yield.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a product bending process, comprising:

[0006] Processing stress dividing holes: processing at least one stress dividing hole along the length direction of the portion to be bent on the plate, so as to divide the portion to be bent into at least two sections;

[0007] Bending: Based on the position to be bent, the plate is bent to form a first side wall, a second side wall and a bending portion between the first side wall and the second side wall of the product.

[0008] Furthermore, the bending portion is configured as a vertical bending portion that makes the first side wall and the second side wall be in a vertical bending state.

[0009] Furthermore, the bending portion has an outer rounded corner and an inner rounded corner.

[0010] Furthermore, the thickness of the bending portion is smaller than the thickness of the first side wall and / or the second side wall, and an inclined rib structure is formed between the inner surface of the bending portion and the inner surface of the first side wall and / or the second side wall.

[0011] Furthermore, the inclined rib structure and the bending portion are both formed in a bending process.

[0012] Furthermore, the bending process includes:

[0013] The sheet is conveyed to the lower die of the stamping die set so that the part to be bent is located above the blade of the lower die;

[0014] The punch is pressed downwards at the portion to be bent, and the punch cooperates with the blade to bend the plate, thereby forming the first side wall, the second side wall and the bending portion connected therebetween.

[0015] Furthermore, the stamping die set has a first blade and a matching first punch, and a second blade and a matching second punch; in the bending process, it includes:

[0016] First bending: the portion to be bent of the sheet is located above the first blade, and the first punch presses downward on the portion to be bent, and the first punch cooperates with the first blade to bend the sheet to 30 to 60 degrees, preferably 45 degrees;

[0017] Second bending: the bending part of the sheet is located above the second blade, and the second punch presses the bending part downward, and the second punch cooperates with the second blade to bend the sheet to 90 degrees.

[0018] Furthermore, the first cutting edge has a first flat concave surface and a first oblique side surface formed on one side edge of the first flat concave surface, and the angle between the first oblique side surface and the first flat concave surface is configured to be 120 to 150 degrees, preferably 135 degrees; the first punch has a first flat convex surface matching with the first flat concave surface, and a second oblique side surface formed on one side edge of the first flat convex surface and matching with the first oblique side surface, and the angle between the second oblique side surface and the first flat convex surface is configured to be 120 to 150 degrees, preferably 135 degrees.

[0019] Further, the second blade has a second flat concave surface, an outer molding surface formed on one side edge of the second flat concave surface and used to mold the outer surface of the bent portion, and a first side elevation formed on a side of the outer molding surface away from the second flat concave surface, and the angle between the first side elevation and the second flat concave surface is configured to be 90 degrees;

[0020] The second punch has a second flat convex surface matching the second flat concave surface, a molding bevel formed on one side edge of the second flat convex surface and used for molding the bevel rib structure, an inner molding surface formed on the side of the molding bevel away from the second flat convex surface and used for molding the inner surface of the bending portion, and a second side vertical surface formed on the side of the inner molding surface away from the molding bevel, and the included angle between the second side vertical surface and the second flat convex surface is configured to be 90 degrees.

[0021] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a product processing process, including the product bending process described above.

[0022] The product bending process and product processing process described in the embodiments of the present invention can interrupt and disperse the stress at the bending point and release the internal stress of the plate by processing at least one stress dividing hole along the rectangular direction of the to-be-bent point before the bending process; at least one stress dividing hole divides the bending point into at least two sections, so that the local stress-bearing edges of the plate are more fully concentrated when the plate is bent, which is conducive to more precise product size forming, and can increase the straightness of the bending part (up to 0.1mm straightness), and the production yield is increased to 100%, meeting the product size tolerance to meet customer usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a flow chart of an implementation method of a product bending process of the present invention.

[0025] Figure 2 It is a schematic structural diagram of a product in one embodiment of the present invention.

[0026] Figure 3 This is a structural schematic diagram of a product from another perspective in one embodiment

[0027] Figure 4 yes Figure 2 Enlarged view of part A in the figure.

[0028] Figure 5 yes Figure 3 Enlarged view of part B in the middle.

[0029] Figure 6 It is a schematic structural diagram of a first punch and a first cutting edge in one embodiment of the present invention.

[0030] Figure 7 It is a schematic structural diagram of a second punch and a second cutting edge in one embodiment of the present invention.

[0031] Figure 7a yes Figure 7 Enlarged view of part C in the middle.

[0032] Figure 8 It is a flow chart of an implementation method of a product processing process of the present invention.

[0033] Figure 8a This is a state diagram of the positioning holes being punched when the plate is transported to the positioning hole punching station.

[0034] Figure 8b This is a diagram of the state of the plate being processed when it is transported to the pre-trimming station.

[0035] Figure 8c This is a diagram of the state of the plate being processed when it is transported to the bulging station and the bulge shaping station.

[0036] Figure 8d This is a diagram of the state of the plate being processed when it is transported to the punching station and the stress hole processing station.

[0037] Figure 8e This is a diagram of the state of the plate being processed when it is transported to the waste punching station.

[0038] Figure 8f This is a diagram of the state of the plate being processed when it is transported to the cutting station.

[0039] The accompanying drawings in the specification are as follows:

[0040] Product 100; first side wall 110; second side wall 120; bending portion 130; inclined rib structure 140; stress distribution hole 150;

[0041] First knife edge 210; first flat concave surface 211; first oblique side surface 212; first punch 220; first flat convex surface 221; second oblique side surface 222; second knife edge 230; second flat concave surface 231; outer molding surface 232; first side vertical surface 233; second punch 240; second flat convex surface 241; molding oblique surface 242; inner molding surface 243; second side vertical surface 244;

[0042] Plate 300; positioning hole 301; arc edge 302; arc punch 302a; inner arc 302b; convex bulge 303; preformed part 304; separation seam 305; end segment 305a; main body segment 3051; edge segment 3052; middle segment 305b; connecting strip 3053. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0046] See also Figures 1 to 5 , Figure 1 It is a flow chart of an implementation method of a product bending process of the present invention. Figure 2 is a schematic diagram of the structure of a product in one embodiment, Figure 3 is a structural schematic diagram of a product from another perspective in one embodiment, Figure 4 yes Figure 2 The enlarged view of the part A in the figure. Figure 5 yes Figure 3 The product bending process of this embodiment is used to bend a straight plate to form a first side wall 110 of the product 100 and a second side wall 120 that is at a required angle (e.g., 90 degrees) to the first side wall 110, wherein a bending portion 130 is formed between the first side wall 110 and the second side wall 120.

[0047] exist Figures 2 to 5 In the embodiment, the first side wall 110 is configured in a horizontal state, the second side wall 120 is configured in a vertical state, the lengths of the first side wall 110 and the second side wall 120 are the same, the thicknesses of the first side wall 110 and the second side wall 120 are the same, and the width of the first side wall 110 is greater than the height of the second side wall 120. Based on the process requirements, the bending portion 130 is configured as a vertical bending portion 130, and the shape of the bending portion 130 is: a straight line structure distributed along the length direction of the first side wall 110 and / or the second side wall 120, that is, the length of the bending portion 130 is greater than its width, and the cross-section of the bending portion 130 is in an arc shape, the outer arc of the outer surface is called an outer fillet, and the inner arc of the inner surface is called an inner fillet. The thickness of the bending portion 130 is smaller than the thickness of the first side wall 110 and / or the second side wall 120, and an inclined rib structure 140 is formed between the inner surface of the bending portion 130 and the inner surface of the first side wall 110 and / or the second side wall 120. Those skilled in the art will understand that Figure 2 The structure shown does not constitute a limitation on the structure of the product 100. In other embodiments, the structure may include Figure 2More or fewer limitations shown, or some limitations may be combined. For example, the bending portion 130 may not be limited to a vertical bending portion 130, the vertical bending portion 130 may not be limited to having an outer fillet and / or an inner fillet, the thickness of the bending portion 130 may be consistent with the first side wall 110 and / or the second side wall 120, the lengths of the first side wall 110 and the second side wall 120 may not be equal, etc.

[0048] like Figure 1 As shown, the product bending process of this embodiment includes the following steps:

[0049] S101, processing stress dividing holes 150: processing at least one stress dividing hole 150 along the length direction of the part to be bent on the plate 300, dividing the part to be bent into at least two sections, so that the plate 300 can be bent more stably during the bending process, improving the bending yield and meeting the functional dimensions required by customers.

[0050] During the processing of the product 100, the sheet 300 can be continuously transported to the stress hole 150 processing station by the conveying mechanism. Each time the sheet 300 is transported to the stress hole 150 processing station, the punching unit at the station punches the stress hole 150 on the sheet 300. In this application scenario, the length direction of the sheet 300 is consistent with the conveying direction, and the width direction of the sheet 300 is perpendicular to the conveying direction. When slitting is performed on the sheet 300, the position of the separation seam is set according to the width of the product 100, and a number of separation seams are formed in the length direction of the sheet 300 at uniform intervals. The length of each separation seam is distributed along the width direction of the sheet 300, and the sheet 300 between each two adjacent separation seams is used to process and form a product 100. Therefore, the length of the product 100 is consistent with the width of the sheet 300 (that is, the length direction of the product 100 is consistent with the width direction of the sheet 300), and the width direction of the product 100 is consistent with the length direction of the sheet 300.

[0051] The part to be bent is distributed in a straight line along the length direction of the product 100. After the product 100 is bent, the part to be bent forms the bending portion 130. The number of the stress holes 150 can be configured according to the length of the part to be bent. When the number of the stress holes 150 is configured as multiple, the multiple stress holes 150 can be evenly distributed along the length direction of the part to be bent at intervals in the part to be bent, and the position of each stress hole 150 can also be determined according to specific circumstances. In this embodiment, the number of the stress holes 150 is configured as two, and the two stress holes 150 divide the part to be bent into three sections; the spacing between the two stress holes 150 is greater than the distance between any stress hole 150 and the adjacent end (the end of the bending part). The size of the upper edge of each stress hole 150 in the width direction of the bending part is adapted to (for example, the same as) the width of the bending part (or the bending portion 130).

[0052] S102 , bending: based on the position to be bent, the plate 300 is bent to form a first side wall 110 , a second side wall 120 and a bending portion 130 between the first side wall 110 and the second side wall 120 of the product 100 .

[0053] Specifically, the sheet 300 is first conveyed to the lower die of the stamping die set so that the part to be bent is located above the blade of the lower die; then, the punch is pressed downward to the part to be bent, and the punch cooperates with the blade to bend the sheet 300, thereby forming the first side wall 110, the second side wall 120 and the bending portion 130 connected therebetween.

[0054] See also Figure 6 and Figure 7 In this embodiment, a 90-degree bend is used as a specific example for description. In the process of bending the plate 300 to 90 degrees, a stamping die set (such as a continuous stamping die set) is used to bend the plate 300. The stamping die set has a first blade 210 and a matching first punch 220, and a second blade 230 and a matching second punch 240. The first cutting edge 210 has a first flat concave surface 211 and a first oblique side surface 212 formed on a side edge of the first flat concave surface 211, a rounded corner is formed between the first flat concave surface 211 and the first oblique side surface 212, and the angle between the first oblique side surface 212 and the first flat concave surface 211 is configured to be 120-150 degrees, preferably 135 degrees; the first punch 220 has a first flat convex surface 221 that is concave-convexly matched with the first flat concave surface 211, and a second oblique side surface 222 that is formed on a side edge of the first flat convex surface 221 and matches with the first oblique side surface 212, a rounded corner is formed between the second flat concave surface 221 and the second oblique side surface 222, and the angle between the second oblique side surface 222 and the first flat convex surface 221 is configured to be 120-150 degrees, preferably 135 degrees.

[0055] The second blade 230 has a second flat concave surface 231, an outer molding surface 232 formed on one side edge of the second flat concave surface 231 and used to mold the outer surface of the bending portion 130, and a first side elevation 233 formed on the side of the outer molding surface 232 away from the second flat concave surface 231, and the angle between the first side elevation 233 and the second flat concave surface 231 is configured to be 90 degrees; the second punch 240 has a second flat convex surface 240 that matches the second flat concave surface 231. 1. A molding bevel 242 for molding the bevel rib structure 140 formed on one side edge of the second flat convex surface 241, an inner molding surface 243 formed on a side of the molding bevel 242 away from the second flat convex surface 241 and used to mold the inner surface of the bending portion 130, and a second side vertical surface 244 formed on a side of the inner molding surface 243 away from the molding bevel 242, wherein the angle between the second side vertical surface 244 and the second flat convex surface 241 is configured to be 90 degrees.

[0056] In the bending process, the plate 300 is bent twice by the stamping die set described above, specifically, including:

[0057] S1021, first bending: the portion to be bent of the sheet 300 is located above the first blade 210, and the first punch 220 punches downwards the portion to be bent, and the first punch 220 cooperates with the first blade 210 to bend the sheet 300 to 30 to 60 degrees, preferably 45 degrees. In the first punching process, the first flat convex surface 221 of the first punch 220 contacts the position on the sheet 300 corresponding to the first side wall 110, and punches downwards to the first flat concave surface 211 of the first blade 210; the second oblique side surface 222 of the first punch 220 contacts the position on the sheet 300 corresponding to the second side wall 120, and punches downwards to the first oblique side surface 212 of the second blade 230, so that the second side wall 120 is bent to 45 degrees, and the second side wall 120 forms an angle of 45 degrees with the plane where the first side wall 110 is located.

[0058] S1022, second bending: the bending part of the plate 300 is located above the second blade 230, and the second punch 240 punches downward the bending part, and the second punch 240 cooperates with the second blade 230 to bend the plate 300 to 90 degrees. Among them, during the second stamping process, the second flat convex surface 241 of the second punch 240 contacts the first side wall 110 and presses it against the second flat concave surface 231; the forming inclined surface 242 of the second punch 240 contacts the position on the plate 300 corresponding to the inclined rib structure 140, and is punched downward to the second flat concave surface 231 to form the inclined rib structure 140; the inner forming surface 243 of the second punch 240 contacts the position on the plate 300 corresponding to the bending portion 130, and is punched downward to the outer forming surface 232 of the second blade 230 to form the bending portion 130; the second side vertical surface 244 of the second punch 240 contacts the inclined second side wall 120 and is punched downward to the first side vertical surface 233 of the second blade 230, so that the second side wall 120 is bent to 90 degrees.

[0059] The product bending process described in the embodiment of the present invention can interrupt and disperse the stress at the bending point and release the internal stress of the plate by processing at least one stress dividing hole along the rectangular direction of the to-be-bent point before the bending process; the at least one stress dividing hole divides the bending point into at least two sections, so that the local stress-bearing edges of the plate are more fully concentrated when the plate is bent, which is conducive to more precise product size forming, and can increase the straightness of the bending part (up to 0.1mm straightness), and the production yield is increased to 100%, meeting the product size tolerance to meet customer usage requirements.

[0060] Please refer to Figure 8, which is a flow chart of an embodiment of the product processing technology of the present invention. Figure 8 In the present configuration, the product processing technology is a continuous processing technology for continuously bending and processing the product 100 based on the continuously conveyed plate 300. The product processing technology includes the following steps:

[0061] S201, Punching positioning holes: see Figure 8a , so that the strip-shaped plate 300 is continuously conveyed forward, and each time it is conveyed to the positioning hole punching station, the punching unit punches the positioning hole 301 on the plate 300, and the positioning hole 301 is used for positioning in subsequent processes. Wherein, the plate 300 is a metal plate, such as a stainless steel plate, and the positioning holes 301 are punched on one side and / or two side edges of the plate 300 perpendicular to the conveying direction, and the two side edges of the horizontal direction are respectively the two long side edges of the plate 300. In this embodiment, the positioning holes 301 are punched on both side edges of the horizontal direction of the plate 300.

[0062] S202, Pre-cut edge: see Figure 8b During the continuous conveying process, the plate 300 is continuously conveyed to the pre-trimming station after the positioning hole 301 is formed in the positioning hole punching station. Each time it is conveyed to the pre-trimming station, the punch of the pre-trimming station punches out an arc-shaped edge 302 downward. The arc-shaped edge 302 is located on the edge of the first side wall 110 of the plate 300 corresponding to the product 100, away from the second side wall 120. The length of the arc-shaped edge 302 is distributed along the side edge, and the arc-shaped edge 302 is close to one of the long sides of the plate 300.

[0063] During the process of machining the arc-shaped edge 302, the arc-shaped punch 302a is used to punch downward to cut the waste material, and the inner arc 302b of the arc-shaped punch 302a is located outside the side edge (outer edge) of the plate 300 corresponding to the first side wall 110 away from the second side wall 120, so that after the product 100 is formed, the arc-shaped edge 302 protrudes outward from the outer edge of the first side wall 110.

[0064] S203, convex hull: see Figure 8c During the continuous conveying process, the plate 300 is continuously conveyed to the embossing station after passing through the positioning hole punching station and the pre-trimming station. Each time it is conveyed to the embossing station, a plurality of embossments 303 are formed on the plate 300 at positions corresponding to the first side wall 110, for example, four embossments 303, one of which is distributed at the position of the arc-shaped edge 302 to enclose the arc-shaped edge 302, and the other three embossments 303 are distributed at intervals along the length direction of the first side wall 110 (the width direction of the plate 300) at positions on the plate 300 corresponding to the first side wall 110.

[0065] S204, convex hull shaping: please refer to 8d, after the convex hull 303 is formed, the convex hull 303 is shaped to make the shape of the convex hull 303 more regular.

[0066] S205, punching: Please continue to refer to 8d. During the continuous conveying process, the plate 300 is continuously conveyed to the punching station after passing through the positioning hole punching station, the pre-trimming station, and the convexity punching station. Each time it is conveyed to the punching station, the punch is pressed downward at the position of each convexity 303, so that at least one through hole is formed at each convexity 303.

[0067] S206, processing stress distribution hole 150: please continue to see Figure 8dWhen the plate 300 is transported to the stress hole 150 processing station, the punch of the stress hole 150 processing station punches at least one stress hole 150 along the length direction of the plate 300 to be bent (the width direction of the plate 300), and the plate 300 to be bent is divided into at least two sections.

[0068] S207, Rough Cuttings: See Figure 8e The portion or area on the sheet 300 used to form the product 100 is called a pre-forming portion 304. When the sheet 300 is directed to the rough cutting station, the punch of the rough cutting station presses downward on the area between each two adjacent pre-forming portions 304, so that the area between each two adjacent pre-forming portions 304 (sheets 300 corresponding to each two adjacent products 100) forms the separation seam 305, and the separation seam 305 is adapted to the length of the product 100 (for example, the same as the length of the product 100 or greater than the length of the product 100).

[0069] The length direction of the partition 305 is consistent with the width direction of the plate 300. When the length of the product 100 is long, the rough cut waste can be punched multiple times by a continuous punching die set to form the partition 305. In this embodiment, the partition 305 is formed by two punchings. In the first punching, two punches distributed along the width direction of the plate 300 punch out two end segments 305a of the partition 305, and in the second punching, a punch facing the area between the two end segments 305a punches downward to form the middle segment 305b of the partition 305.

[0070] Each end segment 305a includes a main segment 3051 coaxial with the middle segment 305b and having the same width, and an edge segment 3052 distributed on the main segment 3051 at one end away from the middle segment 305b. A first concave portion conforming to the arcuate edge 302 is formed on a main segment 3051 close to the arcuate edge 302. Both ends of each edge segment 3052 are spaced apart from the end of another adjacent edge segment 3052, and the sheet 300 at the spaced-apart position forms a connecting strip 3053 between the product 100 (the preformed portion 304 of the product 100 to be formed on the sheet 300) and the sheet 300, so that both ends of each preformed portion 304 are connected to the corresponding long side of the sheet 300 through a connecting strip 3053.

[0071] The lengths of the two edge segments 3052 are distributed along the length direction of the plate 300. The two edge segments 3052 are perpendicular to their respective main segments 3051. Each edge segment 3052 is in a T shape with its respective main segment 3051. A second recess is formed at the position of each edge segment 3052 corresponding to the positioning hole 301.

[0072] S208, bending: Based on the position to be bent, the plate 300 is bent to form the first side wall 110, the second side wall 120 and the bending portion 130 between the first side wall 110 and the second side wall 120 of the product 100. The bending process can be performed by bending the plate 300 according to the bending process described above to form the first side wall 110, the second side wall 120 and the bending portion 130 formed therebetween.

[0073] S209, product shaping: fine-tuning the angle of the bending part to make the angle meet the process requirements; making pits and leveling the position corresponding to each product 100 on the plate 300 to form the product 100;

[0074] S210, Cutting: See Figure 8f , punch out the connecting strips 3053 between the two ends of the product 100 and the corresponding long sides of the plate 300, so that each product 100 is separated from the two long sides of the plate 300; the punch is used to punch downward the connecting strips 3053 between the end of each product 100 and the corresponding long side, so that the product 100 is separated from the corresponding long side of the plate 300. The punch is also used to cut the corresponding long side, so that the long side of the plate 300 is cut into several sections of waste. In this way, the space occupied by the waste can be reduced, which provides convenience for the subsequent treatment of the waste.

[0075] The product processing technology of the embodiment of the present invention is to process at least one stress dividing hole along the length direction of the to-be-bent part before bending the plate to form the first side wall and the second side wall of the product, so as to interrupt and disperse the stress at the bending part and release the internal stress of the plate; the at least one stress dividing hole divides the bending part into at least two sections, so that the local stress-bearing edges are more fully concentrated when the plate is bent, which is conducive to more precise product size forming, and can increase the straightness of the bending part (up to 0.1mm straightness), and the production yield is increased to 100%, meeting the product size tolerance to meet customer usage requirements.

[0076] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A product bending process, comprising: Processing stress dividing holes: processing at least one stress dividing hole along the length direction of the portion to be bent on the plate, so as to divide the portion to be bent into at least two sections; Bending: Based on the position to be bent, the plate is bent to form a first side wall, a second side wall and a bending portion between the first side wall and the second side wall of the product.

2. The product bending process according to claim 1, characterized in that: The bending portion is configured as a vertical bending portion that makes the first side wall and the second side wall be in a vertical bending state.

3. The product bending process according to claim 1, characterized in that: The bending portion has an outer rounded corner and an inner rounded corner.

4. The product bending process according to claim 3, characterized in that: The thickness of the bending portion is smaller than the thickness of the first side wall and / or the second side wall, and an inclined rib structure is formed between the inner surface of the bending portion and the inner surface of the first side wall and / or the second side wall.

5. The product bending process according to claim 4, characterized in that: The inclined rib structure and the bending portion are both formed in the bending process.

6. The product bending process according to claim 5, characterized in that: The bending process includes: The sheet is conveyed to the lower die of the stamping die set so that the part to be bent is located above the blade of the lower die; The punch is pressed downwards at the portion to be bent, and the punch cooperates with the blade to bend the plate, thereby forming the first side wall, the second side wall and the bending portion connected therebetween.

7. The product bending process according to claim 6, characterized in that: The stamping die set comprises a first blade and a matching first punch, and a second blade and a matching second punch; in the bending process, it includes: First bending: the portion to be bent of the sheet is located above the first blade, and the first punch presses downward on the portion to be bent, and the first punch cooperates with the first blade to bend the sheet to 30 to 60 degrees, preferably 45 degrees; Second bending: the bending part of the sheet is located above the second blade, and the second punch presses the bending part downward, and the second punch cooperates with the second blade to bend the sheet to 90 degrees.

8. The product bending process according to claim 7, characterized in that: The first cutting edge has a first flat concave surface and a first oblique side surface formed on one side edge of the first flat concave surface, and the angle between the first oblique side surface and the first flat concave surface is configured to be 120 to 150 degrees, preferably 135 degrees; the first punch has a first flat convex surface matching with the first flat concave surface, and a second oblique side surface formed on one side edge of the first flat convex surface and matching with the first oblique side surface, and the angle between the second oblique side surface and the first flat convex surface is configured to be 120 to 150 degrees, preferably 135 degrees.

9. The product bending process according to claim 7, characterized in that: The second blade has a second flat concave surface, an outer molding surface formed on one side edge of the second flat concave surface and used to mold the outer surface of the bending portion, and a first side elevation formed on a side of the outer molding surface away from the second flat concave surface, and the angle between the first side elevation and the second flat concave surface is configured to be 90 degrees; The second punch has a second flat convex surface matching the second flat concave surface, a molding bevel formed on one side edge of the second flat convex surface and used for molding the bevel rib structure, an inner molding surface formed on the side of the molding bevel away from the second flat convex surface and used for molding the inner surface of the bending portion, and a second side vertical surface formed on the side of the inner molding surface away from the molding bevel, and the included angle between the second side vertical surface and the second flat convex surface is configured to be 90 degrees.

10. A product processing technology, characterized in that: The invention comprises a product bending process as claimed in any one of claims 1 to 9.

Images