Method and apparatus for processing metal parts.

Abstract

To provide a method and apparatus for processing metal parts that thickens the ends by uniformly crushing them. [Solution] The metal part processing method involves applying force to the tip surface (37a) of the inclined portion (37) of the bent plate material (30) and loosening the constraint on the thickness direction of the inclined portion (37) to crush the inclined portion (37) while maintaining the inclination angle (θ) of the inclined portion (37), thereby obtaining a first thick plate material (40) having a thick inclined portion (42) that is thicker than the inclined portion (37). Furthermore, by applying force to the tip surface (45) of the thick inclined portion (42), the thick inclined portion (42) is crushed to obtain a second thick plate material (70) having a thick end portion (71) that is thicker than the main body portion (31).

Description

Technical Field

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[0001] The present invention relates to a method and an apparatus for processing a metal part that thickens a bent end portion.

Background Art

[0002] Among the metal parts constituting a machine, there is a plate material whose end portion is thickly processed. As a method of thickening the end portion of a metal plate material, for example, there is a method of applying a force in a direction perpendicular to the end face of the plate material, but there are problems such as excessive pressure being applied to the plate material. A processing method for solving this problem is disclosed in Patent Document 1.

[0003] In the processing method disclosed in Patent Document 1, bending processing for bending the end portion of the plate material is performed, and then, a force is applied to the tip end face of the bent end portion to crush the end portion, whereby a plate material having a thickened end portion is obtained.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In this processing method, when crushing the end portion, there is a risk that the end portion buckles. When crushing in a state where the end portion is buckled, a part of the end portion is excessively compressed, so there is room for improvement. The end portion cannot be uniformly crushed.

[0006] An object of the present invention is to provide a method and an apparatus for processing a metal part that thickens an end portion by uniformly crushing the end portion.

Means for Solving the Problems

[0007] In this disclosure, by bending the end of a metal plate material diagonally, A bending process is performed to obtain a bent plate material having a main body and a flat, inclined portion that is oriented diagonally to the main body, By applying a force to the tip surface of the inclined portion along the thickness direction of the main body of the bent plate material, and by loosening the constraint on the thickness direction of the inclined portion, the inclined portion is crushed while maintaining the inclination angle of the inclined portion. A first thickening process to obtain a first thick plate material having a thickness-inclined portion that is thicker than the aforementioned inclined portion, By applying a force along the thickness direction of the main body of the bent plate material to the tip surface of the aforementioned thickened inclined portion, the thickened inclined portion is crushed. A method for processing metal parts is provided, which includes a second thickening process to obtain a second thickened plate material having a thicker end than the main body.

[0008] In this disclosure, by bending the end of a metal plate material diagonally, A bending process is performed to obtain a bent plate material having a main body and a flat, inclined portion that is oriented diagonally to the main body, By applying a force to the tip surface of the inclined portion along the thickness direction of the main body of the bent plate material, and by loosening the constraint on the thickness direction of the inclined portion, the inclined portion is crushed while maintaining the inclination angle of the inclined portion. A first thickening process to obtain a first thick plate material having a thickness-inclined portion that is thicker than the aforementioned inclined portion, By applying a force along the thickness direction of the main body of the bent plate material to the tip surface of the aforementioned thickened inclined portion, the thickened inclined portion is crushed. A method for processing metal parts, comprising: a second thickening process to obtain a second thickened plate material having a thicker end than the main body; A processing apparatus capable of performing the first thick-wall processing is provided. [Effects of the Invention]

[0009] The present invention provides a method and apparatus for processing metal parts that thickens the ends by uniformly crushing them. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram of a bending machine. [Figure 2] Figure 2A illustrates the state in which a sheet metal is clamped in the processing apparatus shown in Figure 1. Figure 2B illustrates a method for forming an inclined section by bending the end of the sheet metal from the state shown in Figure 2A. [Figure 3] This is a schematic diagram of a processing apparatus that performs the first thick-wall processing. [Figure 4] Figure 4A illustrates the state in which a bent plate material is clamped in the processing apparatus shown in Figure 3. Figure 4B illustrates the state in which the bent plate material is restrained so as to maintain the inclination angle of the inclined portion. Figure 4C illustrates the state in which the inclined portion is crushed by applying a force along the thickness direction of the main body of the bent plate material to the tip surface of the inclined portion and simultaneously loosening the restraint in the thickness direction of the inclined portion. Figure 4D illustrates the state in which a first thick plate material having a thick inclined portion has been obtained. [Figure 5] This is a schematic diagram of a processing device that performs the second thick-wall processing. [Figure 6] Figure 6A illustrates the state in which the first thick plate material is clamped in the processing apparatus shown in Figure 5. Figure 6B illustrates the state in which a second thick plate material having a thick end has been obtained. [Figure 7] This is a diagram illustrating an example of the second thick plate material. [Figure 8] Figure 8A is a diagram illustrating thick-wall processing using the conventional technology. Figure 8B is a diagram illustrating the operation of the first thick-wall processing according to the present invention. [Modes for carrying out the invention]

[0011] <Examples> Embodiments will be described based on the attached drawings. Note that the embodiments described here are not intended to particularly limit the present invention. Furthermore, the elements constituting each embodiment can be combined as appropriate. Also, members and parts having the same function are denoted by the same reference numerals, and redundant descriptions are omitted or simplified as appropriate.

[0012] Referring to FIG. 1, a press device 10 including a slide 12 reciprocable with respect to a bolster 11 and a bending device 20 attachable to the press device 10 are shown.

[0013] (Bending) Referring to FIGS. 1, 2A, and 2B, first, in the bending process, end portions 16, 16 of a metal plate material 15 as a workpiece are bent obliquely from the surface 15a side to the back surface 15b side of the plate material 15 to obtain a bent plate material 30.

[0014] (Direction) Hereinafter, the direction in which the surface 15a of the plate material 15 faces is defined as up, the direction in which the back surface 15b of the plate material facing is defined as down, and the thickness direction of the plate material 15 is defined as the vertical direction. Down is the bending direction, and up is also the opposite direction to the bending direction.

[0015] Based on the direction along the surface 15a or the back surface 15b of the plate material 15, the direction away from the center portion C of the plate material 15 is defined as out, and the direction approaching the center portion C is defined as in.

[0016] (Bending device 20) The bending device 20 for performing bending includes a lower die set 22 that can be fixed to the bolster 11, a lower die 24 supported by the lower die set 22 on which the plate material 15 is placed, an upper die set 23 that can be fixed to the slide 12, an upper cushion 25 provided at the lower part of the upper die set 23 via an elastic part 14 (for example, a compression coil spring), and two bending dies 26, 26 fixed to the lower part of the upper die set 23.

[0017] (Bending) First, when the upper die set 23 is moved downward, the lower die 24 and upper cushion 25 grip the sheet metal 15, as shown in Figure 2A. Further downward movement of the upper die set 23 causes the bending die 26 to begin bending the end 16 of the sheet metal 15. When the top of the upper cushion 25 contacts the upper die set 23, the bending of the end 16 of the sheet metal 15 by the bending die 26 is completed, as shown in Figure 2B.

[0018] (Bent plate material 30) Refer to Figure 2B. The bent plate material 30 obtained by bending has a flat main body portion 31, a curved portion 34 located next to the main body portion 31, and an inclined portion 37 located next to the curved portion 34 and facing diagonally (diagonally downward and outward). The angle of the inclined portion 37 with respect to the thickness direction (vertical direction) of the main body portion 31 is defined as the inclination angle θ. The inclination angle θ is approximately 30 degrees, but can be changed as appropriate as long as the first and second thickening processes described below can be carried out.

[0019] The figures 1 to 2B show a schematic example of bending, and other well-known technologies may be used for the bending method and bending apparatus 20, as long as a bent sheet metal 30 can be obtained.

[0020] (1st thick wall processing) Figures 3 and 4 show the first thickening process after bending. In the first thickening process, an upward force is applied to the inclined portion 37 (from the back surface 33 to the front surface 32 of the main body portion 31 of the bent plate material 30, opposite to the direction in which the inclined portion 37 is bent), and the constraint on the thickness direction of the inclined portion 37 is loosened. This compresses the inclined portion 37 while maintaining the inclination angle θ of the inclined portion 37, thereby thickening the inclined portion 37 and obtaining the first thickened plate material 40.

[0021] (1st processing device 50) The first processing apparatus 50 for performing the first thick-wall processing includes a support die 51, a pressing die 52, an oblique pressing die 53 capable of restraining the bent plate material 30, and a crushing die 54 having a crushing surface 54a capable of crushing the tip surface 37a of the inclined portion 37. The support die 51 is provided on the lower die set 55 via an elastic portion 56. The crushing die 54 is fixed to the lower die set 55. The pressing die 52 and the oblique pressing die 53 are provided on the upper die set (not shown) via an elastic portion 56.

[0022] (Restraining of the bent plate material 30) Refer to Figures 3 and 4A. First, the bent plate material 30 is placed on the support die 51, and the upper die set is lowered to sandwich the bent plate material 30 between the support die 51 and the clamping die 52.

[0023] (Support die 51) Refer to Figure 4A. The support die 51 has a main body back support portion 51a that supports the back surface 33 of the main body portion 31, a curved portion back support portion 51b that supports the back surface 36 of the curved portion 34, an inclined portion back support portion 51c that supports a part of the back surface 39 of the inclined portion 37, and a side surface 51d that extends downward from the lower end 51e of the inclined portion back support portion 51c.

[0024] (Area of ​​the support portion 51c on the back of the inclined section) The inclined portion back support portion 51c supports the surface 39 from the base end portion 39a to the intermediate portion 39b. The intermediate portion 39b is any part of the back surface 39 of the inclined portion 37 between the base end portion 39a and the tip portion 39c. In other words, the range supported by the inclined portion back support portion 51c can be changed as appropriate.

[0025] (Pressing die 52) The pressing die 52 has a main body surface pressing portion 52a that presses the surface 32 of the main body portion 31, a curved portion surface pressing portion 52b that presses a part of the surface 35 of the curved portion 34, an outer extension portion 52c that extends outward from the curved portion surface pressing portion 52b, and a side surface that extends upward from the tip of the outer extension portion 52c.

[0026] (Area of ​​the curved surface pressing portion 52b) The curved surface pressing portion 52b presses down on the surface 35 from the base end 35a to the intermediate portion 35b. The intermediate portion 35b is any part of the surface 35 between the base end 35a and the tip end 35c. In other words, the pressing range of the curved surface pressing portion 52b can be changed as appropriate.

[0027] Refer to Figures 4A and 4B. Next, the upper die set (not shown) is lowered further. The angled pressing die 53 slides against the side of the pressing die 52 and presses against the crushing die 54. This completes the restraint of the bent plate material 30 by the support die 51, the pressing die 52, and the angled pressing die 53. In this embodiment, first the bent plate material 30 is placed on the support die 51, then the pressing die 52 sandwiches the bent plate material 30 together with the support die 51, and then the angled pressing die 53 presses against the inclined portion 37. However, this order can be changed as appropriate, as long as the bent plate material 30 is restrained as shown in Figure 4B.

[0028] The inclined portion back support portion 51c and the inclined portion front support portion 53a can be said to sandwich the inclined portion 37 in the thickness direction of the inclined portion 37. B1 is the distance between the inclined portion back support portion 51c and the inclined portion front support portion 53a, and also indicates the thickness of the inclined portion 37.

[0029] (Diagonal press die 53) The oblique pressing die 53 has an oblique surface pressing portion 53a that presses a part of the surface 38 of the oblique portion 37, and an opposing surface 53b that faces the crushing surface 54a of the crushing die 54.

[0030] (Range of the inclined surface pressing portion 53a) The inclined surface pressing portion 53a presses down from the tip portion 38b to the intermediate portion 38a. The intermediate portion 38a is any portion between the tip portion 38b on the surface 38 of the inclined portion 37 and the tip portion 35c on the surface 35. In other words, the range pressed down by the inclined surface pressing portion 53a can be changed as appropriate.

[0031] (Positions of intermediate sections 38a and 39b) Refer to FIG. 4B. In the state where the restraint is completed, with respect to the thickness direction (vertical direction) of the main body portion 31, the middle portion 38a of the surface 38 of the inclined portion 37 is above the middle portion 39b of the back surface 39 of the inclined portion 37. That is, the inclined portion surface pressing portion 53a and the inclined portion back surface support portion 51c are positioned such that a part of them faces each other.

[0032] (Crushing of the inclined portion 37) Refer to FIGS. 3, 4B and 4C. Next, move the upper die set (not shown) further downward. The side surface 52d of the pressing die 52 slides downward with respect to the diagonal pressing die 53, and the side surface 51d of the support die 51 slides downward with respect to the crushing die 54. When the bent plate material 30 sandwiched between the support die 51 and the pressing die 52 moves downward, the crushing surface 54a of the crushing die 54 contacts the tip surface 37a of the inclined portion 37 and crushes the tip surface 37a of the inclined portion 37.

[0033] Refer to FIG. 4C. As the bent plate material 30 moves downward, the distance between the lower end 51e of the inclined portion back surface support portion 51c of the support die 51 and the inner end 54b of the crushing surface 54a of the crushing die 54 becomes shorter. The distance between the outer end 52e of the outer extension portion 52c of the pressing die 52 and the upper end 53c of the inclined portion surface pressing portion 53a of the diagonal pressing die 53 becomes shorter.

[0034] At the same time, the interval B2 between the inclined portion back surface support portion 51c and the inclined portion surface pressing portion 53a widens (B1 < B2). That is, with respect to the thickness direction of the inclined portion 37, the restraint on the inclined portion 37 becomes loose. The height (dimension in the vertical direction) of the inclined portion 37 becomes shorter, and the thickness B2 of the crushed inclined portion 37 gradually increases.

[0035] (Deformation of the curved portion 34) The curved portion 34 is deformed by a force applied from below via the inclined portion 37 and being pressed by the outer extension portion 52c.

[0036] (The first thick plate 40) Refer to Figures 3 and 4D. When the support die 51 contacts the lower die set 55, the crushing of the inclined portion 37 is completed, and the first thick plate material 40 is obtained. At this time, the lower end 51e of the support portion 51c on the back of the inclined portion of the support die 51 and the inner end 54b of the crushing surface 54a of the crushing die 54 overlap. The outer end 52e of the outer extension portion 52c of the pressing die 52 and the upper end 53c of the pressing portion 53a on the inclined portion surface of the oblique pressing die 53 overlap.

[0037] The first thick plate material 40 has a main body portion 31, a thick inclined portion 42 that is thicker than the inclined portion 37, and a connecting portion 41 that connects the main body portion 31 and the thick inclined portion 42. The thickness B3 of the thick inclined portion 42 is thicker than the thickness B1 of the inclined portion 37 (B3 > B2 > B1).

[0038] (Thick wall slope part 37) The inclination angle θ of the inclined portion 37 (see Figure 4) is equal to the inclination angle θ of the thickened inclined portion 42 (see Figure 4D). The back surface 44 of the thickened inclined portion 42 is at the same angle as the back surface 39 of the inclined portion 37. The front surface 43 of the thickened inclined portion 42 is at the same angle as the front surface 38 of the inclined portion 37. It can also be said that the front surface 43 and the back surface 44 are parallel.

[0039] The tip surface 45 of the thickened inclined portion 42 is oriented in the same direction as the back surface 33 of the main body portion 31. The opposite surface 46, opposite to the tip surface 37a, is oriented in the same direction as the front surface 32 of the main body portion 31. The shape of the thickened inclined portion 42 is not limited as long as the inclination angle θ of the thickened inclined portion 42 is equal to the inclination angle θ of the inclined portion 37. The orientation of the tip surface 37a and the opposite surface 46 is not limited to this embodiment.

[0040] Note that the first processing apparatus 50 shown in Figure 3 is an example, and can be modified as appropriate, as long as the first thick-wall processing is possible, specifically as long as the relative movement of the dies 51 to 54 remains unchanged. For example, in the embodiment, the support die 51 and the pressing die 52 move relative to the crushing die 54 to press the inclined portion 37 of the bent plate material 30 against the crushing die 54, but the crushing die 54 may also move relative to the support die 51 and the pressing die 52 to press the inclined portion 37. The configuration of the support die 51, the pressing die 52, the angled pressing die 53, and the crushing die 54, as well as the configuration of the press apparatus 10 (for example, pressure adjustment on the bent plate material by the die cushion), can be changed as appropriate.

[0041] (Second thick wall processing) Figures 5 and 6 show the second thickening process after the first thickening process. In the second thickening process, an upward force (from the back surface 33 of the main body 31 to the front surface 32, opposite to the direction in which the thickening inclined portion 42 is bent) is applied to the thickening inclined portion 42 to crush it, thereby obtaining the second thickened plate material 70.

[0042] (Processing equipment 60) Refer to Figures 5 and 6A. The second processing apparatus 60 for performing the second thickening process includes a support die 63, a pressing die 66 for restraining the thickened plate material 40, and a crushing die 65 having a crushing surface 65a capable of crushing the leading edge surface 45 of the thickened inclined portion 42.

[0043] The support die 63 is provided on the lower die set 61 via an elastic portion 56. The crushing die 65 is fixed to the lower die set 61. The clamping die 66 is fixed to the upper die set 67.

[0044] In the first thick-wall processing, first, the thick-walled plate material 40 is placed on the support die 63, and the upper die set 67 is moved downward so that the thick-walled plate material 40 is sandwiched between the support die 63 and the clamping die 66.

[0045] (Support die 63) The support die 63 has a main body back support portion 63a that supports the back surface 33 of the main body portion 31, a connecting portion back support portion 63b that supports the back surface 48 of the connecting portion 41, and an outer surface 63c that extends downward from the connecting portion back support portion 63b and faces outward.

[0046] (Pressing die 66) The pressing die 66 has a main body surface pressing portion 66c that presses the surface 32 of the main body portion 31, a connecting portion surface pressing portion 66d that presses the surface 47 of the connecting portion 41, an opposite surface pressing portion 66e that presses the opposite surface 46 of the thickness inclined portion 42, an outer extension portion 66b that extends further outward from the opposite surface pressing portion 66e, and an inner surface portion 66a that extends downward from the outer extension portion 66b and faces the outer surface portion 63c.

[0047] Refer to Figures 6A and 6B. Furthermore, when the upper die set 67 is moved downward, the outer surface 63c of the support die 63 slides downward relative to the crushing die 65, and the inner surface 66a of the press die 66 slides downward relative to the crushing die 65.

[0048] As the thick plate material 40, sandwiched between the support die 63 and the pressing die 66, moves downward, the crushing surface 65a of the crushing die 65 comes into contact with the leading surface 45 of the thick inclined portion 42, and the thick inclined portion 42 begins to crush from the leading surface 45. The area surrounded by the outer extension 66b, the inner surface 66a, the crushing surface 65a, and the outer surface 63c gradually shrinks, and when the support die 63 comes into contact with the lower die set 61, the crushing of the thick inclined portion 42 is completed, and the second thick plate material 70 is obtained.

[0049] (thick end 71) The second thick plate material 70 has a main body portion 31, a connecting portion 41, and a thick end portion 71 that is thicker than the main body portion 31. The shape of the formed thick end portion 71 is not limited as long as the thickness T2 of the thick end portion 71 is greater than the thickness T1 of the main body portion 31 (T2 > T1).

[0050] The back surface 73 of the thick end portion 71 faces the same direction as the back surface 33 of the main body portion 31. The front surface 75 of the thick end portion 71 faces the same direction as the front surface 32 of the main body portion 31. The side surface 74 of the thick end portion 71 faces outward. These orientations may be changed as appropriate.

[0051] The figures 5 to 6B schematically illustrate an example of the second thickening process. As long as the second thickened plate material 70 can be obtained, other well-known technologies may be used for the method of performing the second thickening process and the second processing apparatus 60.

[0052] Refer to Figure 7. The second thickened plate material 70 can be used, for example, as a mounting part for attaching devices or components to a vehicle, but the use of the second thickened plate material 70 is not limited. Also, there only needs to be at least one thickened end portion 71. Furthermore, the present invention may also be used for processing to make the entire end portion of the plate material thicker.

[0053] In this embodiment, the surface 32 of the main body 31 and the surface 75 of the thick end portion 71 are stepped. In this invention, various dies may be modified so that the surface 32 and the surface 75 are located on the same plane, or so that the surface 75 is located above the surface 32.

[0054] Refer to Figure 4B. For example, change the range pressed by the curved surface pressing portion 52b or the vertical position of the curved surface pressing portion 52b. Refer to Figure 6A. For example, change the vertical position of the connecting surface pressing portion 66d or the vertical position of the opposite surface pressing portion 66e.

[0055] (Effects of the example) (Conventional technology) The effects of this embodiment will be explained in comparison with the conventional technology shown in Figure 8A. When a bent plate material 100 is restrained by a support die 102 and a pressing die 103, and the end 101 is crushed from below by a crushing die 104, the distance A between the support die 102 and the pressing die 103 remains constant regardless of the position of the crushing die 104. Since the end 101 is not restrained, there is a risk that the end 101 will buckle when it is crushed. If the end 101 is crushed while it is buckled, a portion 106a of the formed thick end 106 will be excessively compressed.

[0056] (First effect) Refer to Figures 1 to 6. Firstly, the processing method for metal parts is: By bending the end 16 of the metal plate 15 diagonally, A bending process is performed to obtain a bent plate material 30 having a main body portion 31 and a flat, inclined portion 37 that is oriented diagonally to the main body portion 31. By applying a force to the tip surface 37a of the inclined portion 37 along the thickness direction of the main body portion 31 of the bent plate material 30, and simultaneously loosening the constraint on the inclined portion 37 in the thickness direction, the inclined portion 37 is crushed while maintaining the inclination angle θ of the inclined portion 37. A first thickening process is performed to obtain a first thick plate material 40 having a thick inclined portion 42 that is thicker than the inclined portion 37, By applying a force along the thickness direction of the main body portion 31 of the bent plate material 30 to the tip surface 45 of the thickened inclined portion 42, the thickened inclined portion 42 is crushed. The method includes a second thickening process to obtain a second thickened plate material 70 having a thickened end portion 71 that is thicker than the main body portion 31.

[0057] As described above, in the first metal part processing method, the thickness of the end portion 16 of the plate material 15 is increased by performing two separate thickness-reducing processes: a first thickness-reducing process and a second thickness-reducing process.

[0058] Refer to FIG. 8B. In the first thickening process, a force along the thickness direction of the main body portion 31 of the bent plate material 30 is applied to the tip surface 37a of the inclined portion 37, and the restraint in the thickness direction of the inclined portion 37 is relaxed (B1 < B2 < B3). While maintaining the inclination angle θ of the inclined portion 37, the inclined portion 37 is crushed. Therefore, the inclined portion 37 does not buckle, the inclined portion 37 can be thickened, and the thick-walled inclined portion 42 can be formed. As the inclined portion 37 is crushed, it can also be said that the surfaces where the inclined portion surface support portion 53a and the inclined portion back surface support portion 51c face each other gradually become larger through the thick-walled inclined portion 42.

[0059] Refer to FIGS. 6A and 6B. In the second thickening process, the distance between the inner surface 66a and the outer surface 63c when crushing the thick-walled inclined portion 42 is constant as in the prior art. However, since the thick-walled inclined portion 42 has undergone the first thickening process, it is thicker and has a lower height H compared to the inclined portion 37. Compared with the case of directly crushing the inclined portion 37, the thick-walled inclined portion 42 is more likely to deform as a whole. Therefore, a processing method for a metal part that thickens the end portion can be provided by performing the thickening process in two steps, namely the first thickening process and the second thickening process, and uniformly crushing the end portion.

[0060] (Second effect) Second, the first processing device 50 for the metal part obtains a bent plate material 30 having a main body portion 31 and a flat inclined portion 37 facing obliquely to the main body portion 31 by bending the end portion 16 of the metal plate material 15 obliquely, which is a bending process, and a first thickening process in which a force along the thickness direction of the main body portion 31 of the bent plate material 30 is applied to the tip surface 37a of the inclined portion 37, and the restraint in the thickness direction of the inclined portion 37 is relaxed to crush the inclined portion 37 while maintaining the inclination angle θ of the inclined portion 37, to obtain a first thick plate material 40 having a thick-walled inclined portion 42 thicker than the inclined portion 37, and a second thickening process in which a force along the thickness direction of the main body portion 31 of the bent plate material 30 is applied to the tip surface 45 of the thick-walled inclined portion 42 to crush the thick-walled inclined portion 42, ​It is possible to perform a first thickening process in a metal part processing method that includes a second thickening process to obtain a second thickened plate material 70 having a thickened end portion 71 that is thicker than the main body portion 31.

[0061] This invention provides a processing device for metal parts that thickens the ends by uniformly crushing them. [Explanation of symbols]

[0062] 15...Plate material 30... Bent sheet metal 31...Main body 37…Slope part 37a...Tip surface of the inclined section θ... Inclination angle of the inclined section 40…First thick plate material 42…thickness slope part 45...Tip surface of the thickened inclined section 50...First processing device (processing device) 70…Second thick plate material 71...Thick end

Claims

1. By bending the ends of the metal plate at an angle, A bending process is performed to obtain a bent plate material having a main body and a flat, inclined portion that is oriented diagonally to the main body, By applying a force to the tip surface of the inclined portion along the thickness direction of the main body of the bent plate material, and by loosening the constraint on the thickness direction of the inclined portion, the inclined portion is crushed while maintaining the inclination angle of the inclined portion. A first thickening process to obtain a first thick plate material having a thickness-inclined portion that is thicker than the aforementioned inclined portion, By applying a force along the thickness direction of the main body of the bent plate material to the tip surface of the aforementioned thickened inclined portion, the thickened inclined portion is crushed. A method for processing metal parts, comprising: a second thickening process for obtaining a second thick plate material having a thicker end than the main body.

2. By bending the ends of the metal plate at an angle, A bending process is performed to obtain a bent plate material having a main body and a flat, inclined portion that is oriented diagonally to the main body, By applying a force to the tip surface of the inclined portion along the thickness direction of the main body of the bent plate material, and by loosening the constraint on the thickness direction of the inclined portion, the inclined portion is crushed while maintaining the inclination angle of the inclined portion. A first thickening process to obtain a first thick plate material having a thickness-inclined portion that is thicker than the aforementioned inclined portion, By applying a force along the thickness direction of the main body of the bent plate material to the tip surface of the aforementioned thickened inclined portion, the thickened inclined portion is crushed. A method for processing metal parts, comprising: a second thickening process to obtain a second thickened plate material having a thicker end than the main body portion, A processing apparatus capable of performing the first thick-wall processing described above.

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