Bending positioning tooling and bending method

Abstract

The present invention discloses a bending positioning tool and a bending method, wherein the bending positioning tool comprises a fitting part, an abutting part and a limiting mechanism, and is used in conjunction with a bending machine, wherein the bending machine comprises a bending upper die, a bending lower die and a positioning block; wherein the fitting part is used to fit on a bending workpiece; the abutting part is connected to the fitting part, and the abutting part is used to abut against the positioning block to limit the position of the fitting part relative to the bending upper die at least in a direction perpendicular to the bending upper die; the limiting mechanism is arranged between the fitting part and the bending workpiece and is used to limit the position of the bending workpiece relative to the fitting part at least in a direction perpendicular to the bending upper die. The present invention can improve the positioning accuracy of the bending workpiece on the bending machine, and thus can improve the dimensional accuracy after bending and forming.

Description

Technical Field

[0001] The invention relates to a bending positioning tool and a bending method. Background Art

[0002] At present, in sheet metal bending processing, some bent workpieces need to undergo multiple bending processes, such as Figure 1 As shown, after several bending processes, the bent workpiece forms a positioning portion and a portion to be folded, the positioning portion abuts against the positioning block, and the portion to be folded abuts against the lower bending die. However, there are two non-90° bending angles between the positioning portion and the portion to be folded. Since the angle and size of the bending angle itself are not precise, cumulative errors will occur. In addition, the material thickness of the bent workpiece is thin. When the bent workpiece is pushed by hand to fit tightly against the positioning block, the two non-90° bending angles will produce elastic deformation. These factors will affect the positioning accuracy of the bent workpiece, resulting in unqualified dimensions after bending. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a bending positioning tool, which can improve the positioning accuracy of the bent workpiece on the bending machine, thereby improving the dimensional accuracy after bending and forming.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a bending positioning tool, which includes a fitting portion, an abutting portion and a limiting mechanism, and is used in conjunction with a bending machine, wherein the bending machine includes a bending upper die, a bending lower die and a positioning block; wherein,

[0005] The bonding portion is used to bond to the bending workpiece;

[0006] The abutting portion is connected to the fitting portion, and the abutting portion is used to abut against the positioning block to limit the position of the fitting portion relative to the bending upper mold at least in a direction perpendicular to the bending upper mold;

[0007] The limiting mechanism is arranged between the fitting portion and the bending workpiece and is used to limit the position of the bending workpiece relative to the fitting portion at least in a direction perpendicular to the bending upper die.

[0008] A specific structure of the limiting mechanism is further provided, wherein the limiting mechanism comprises at least one waist-shaped hole and a pin component corresponding to the waist-shaped hole and adapted to the corresponding waist-shaped hole; wherein,

[0009] The waist-shaped hole is provided on any one of the fitting portion and the bending workpiece, and the length direction of the waist-shaped hole is parallel to the length direction of the bending upper die;

[0010] The pin component is arranged on the remaining one of the fitting portion and the bent workpiece, and the pin component is used to be inserted into the corresponding waist-shaped hole.

[0011] A specific solution of the pin component is further provided, wherein the pin component is a rivet nut riveted on the bent workpiece, and the waist-shaped hole is arranged on the fitting portion.

[0012] Furthermore, after being bent, the bending workpiece forms a bending line, a first bending portion located on one side of the bending line, and a second bending portion located on the other side of the bending line; wherein,

[0013] The laminating portion is used to be laminating on the first bending portion;

[0014] A bending groove for the second bending portion to pass through is provided between the fitting portion and the abutting portion.

[0015] Furthermore, the abutting portion is connected to the fitting portion through two connecting portions; wherein,

[0016] One end of the connecting portion is connected to the fitting portion;

[0017] The other end of the connecting portion is connected to the abutting portion;

[0018] The bending groove is located between the fitting portion, the abutting portion and the two connecting portions.

[0019] In order to further limit the position of the bent workpiece relative to the fitting portion, the bent workpiece is provided with a left folding edge and a right folding edge;

[0020] The fitting portion is provided with a left rib and a right rib;

[0021] The left rib is used to abut against the right end surface of the left folding edge, and the right rib is used to abut against the left end surface of the right folding edge, so as to limit the position of the bent workpiece relative to the fitting portion in the length direction of the bending upper die.

[0022] In order to further detect whether the installation is correct, a process circular hole is provided on the bending workpiece;

[0023] The fitting portion is provided with a detection groove, and the detection groove is used to overlap with at least a part of the process circular hole when the bent workpiece and the fitting portion are installed in place.

[0024] The present invention also provides a bending method, which is implemented based on the bending positioning tool, and the steps of the method include:

[0025] S1: fitting the fitting portion onto the bending workpiece and limiting the relative position between the bending workpiece and the fitting portion through the limiting mechanism;

[0026] S2: placing the bending workpiece between the bending upper die and the bending lower die, and abutting the abutting portion against the positioning block;

[0027] S3: The bending upper die and the bending lower die are closed to bend the bending workpiece.

[0028] Furthermore, the bent workpiece has a first side portion, a second side portion, a third side portion, a fourth side portion, a fifth side portion, a sixth side portion and a seventh side portion which are connected in sequence after being bent and formed;

[0029] The fourth side portion is provided with a process circular hole;

[0030] The fitting portion is provided with a detection groove, and the detection groove is used to overlap with at least a part of the process circular hole when the fourth side portion and the fitting portion are installed in place;

[0031] The limiting mechanism includes at least one waist-shaped hole, a first nut group and a second nut group;

[0032] The waist-shaped hole is arranged on the fitting portion;

[0033] The first nut group and the second nut group are respectively arranged on the fourth side portion, and the first nut group and the second nut group respectively include riveted nuts corresponding to the waist-shaped holes;

[0034] A first bending line is formed between the first side portion and the second side portion;

[0035] A second bending line is formed between the second side portion and the third side portion;

[0036] A third bending line is formed between the third side portion and the fourth side portion;

[0037] A fourth bending line is formed between the fourth side portion and the fifth side portion;

[0038] A fifth bending line is formed between the fifth side portion and the sixth side portion;

[0039] A sixth bending line is formed between the sixth side portion and the seventh side portion;

[0040] The steps of the method include:

[0041] M1: taking a riveted nut and an unbent bent workpiece, riveting the riveted nut on the bent workpiece to form the first nut group and the second nut group, and bending the bent workpiece along the first bending line, the second bending line, the fifth bending line and the sixth bending line respectively by the bending machine;

[0042] M2: attach the fitting portion to the fourth edge portion, insert the riveting nut in the first nut group into the corresponding waist-shaped hole, and check whether the inspection groove overlaps with at least a part of the process circular hole. If so, execute M3;

[0043] M3: placing the bending workpiece between the bending upper die and the bending lower die, abutting the abutting portion against the positioning block, and closing the bending upper die with the bending lower die to bend the bending workpiece along the third bending line;

[0044] M4: attach the attaching portion to the fourth edge portion, insert the riveting nut in the second nut group into the corresponding waist-shaped hole, and check whether the inspection groove overlaps with at least a part of the process circular hole. If so, execute M5;

[0045] M5: placing the bending workpiece between the bending upper die and the bending lower die, abutting the abutting portion against the positioning block, and closing the bending upper die with the bending lower die to bend the bending workpiece along the fourth bending line.

[0046] Furthermore, the fourth side is horizontally arranged, the first side, the third side, the fifth side and the seventh side are vertically arranged, and the second side and the sixth side are inclinedly arranged.

[0047] After adopting the above technical solution, take the riveted nut and the unbent bending workpiece, rivet the riveted nut on the bending workpiece to form the first nut group and the second nut group, and bend the bending workpiece along the first bending line, the second bending line, the fifth bending line and the sixth bending line respectively by the bending machine. Then the fitting portion is fitted on the fourth side, the riveted nut in the first nut group is inserted into the corresponding waist-shaped hole, and it is checked whether the detection groove overlaps with at least a part of the process circular hole. If it overlaps, the bending workpiece is placed between the bending upper die and the bending lower die, the abutting portion is abutted on the positioning block, and the bending upper die and the bending lower die are combined to bend the bending workpiece along the third bending line. Then the fitting portion is fitted on the fourth side, the riveted nut in the second nut group is inserted into the corresponding waist-shaped hole, and it is checked whether the detection groove overlaps with at least a part of the process circular hole. If they overlap, the bending workpiece is placed between the bending upper die and the bending lower die, the abutting portion is abutted against the positioning block, and the bending upper die and the bending lower die are closed to bend the bending workpiece along the fourth bending line. Positioning the bending workpiece by the bending positioning tool not only avoids the cumulative error caused by the inaccurate angle and size of the bending angle itself, but also avoids the positioning deviation caused by the elastic deformation of the bending angle, greatly improving the positioning accuracy of the bending workpiece on the bending machine, and improving the dimensional accuracy after bending and forming and the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the structure of the bending workpiece when being bent in the prior art;

[0049] Figure 2 It is a schematic diagram of the structure of the bent workpiece of the present invention when being bent;

[0050] Figure 3 It is a structural schematic diagram of the bending positioning tool of the present invention;

[0051] Figure 4 It is a schematic diagram of the assembly of the bending positioning tool and the bending workpiece after bending forming;

[0052] Figure 5 It is a schematic diagram of the assembly of the bending positioning tool and the bending workpiece before bending forming;

[0053] Figure 6 It is a schematic diagram of the structure of the bent workpiece after bending forming. DETAILED DESCRIPTION

[0054] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0055] Embodiment 1

[0056] like Figures 2 to 6 As shown, a bending positioning tool comprises a fitting portion 1, an abutting portion 2 and a limiting mechanism 3, and is used in conjunction with a bending machine, wherein the bending machine comprises a bending upper die 100, a bending lower die 200 and a positioning block 300; wherein,

[0057] The bonding portion 1 is used to bond to the bending workpiece 4;

[0058] The abutting portion 2 is connected to the fitting portion 1, and the abutting portion 2 is used to abut against the positioning block 300 to limit the position of the fitting portion 1 relative to the bending upper mold 100 at least in a direction perpendicular to the bending upper mold 100;

[0059] The limiting mechanism 3 is arranged between the fitting portion 1 and the bending workpiece 4 and is used to limit the position of the bending workpiece 4 relative to the fitting portion 1 at least in a direction perpendicular to the bending upper die 100, and further limit the position of the bending workpiece 4 relative to the bending upper die 100 in a direction perpendicular to the bending upper die 100, which not only avoids the cumulative error caused by the inaccurate angle and size of the bending angle itself, but also avoids the positioning deviation caused by the elastic deformation of the bending angle, greatly improves the positioning accuracy of the bending workpiece 4 on the bending machine, and improves the dimensional accuracy after bending and the product qualification rate. In this embodiment, the bending upper die 100 is a long strip structure, and the direction perpendicular to the bending upper die 100 is the direction perpendicular to the length direction of the bending upper die 100.

[0060] like Figures 3-5 As shown, the limiting mechanism 3 is, for example but not limited to, the following structure, which includes at least one waist-shaped hole 5 and a pin component corresponding to the waist-shaped hole 5 and adapted to the corresponding waist-shaped hole 5; wherein,

[0061] The waist-shaped hole 5 is provided on any one of the fitting portion 1 and the bending workpiece 4, and the length direction of the waist-shaped hole 5 is parallel to the length direction of the bending upper die 100;

[0062] The pin component is arranged on the remaining one of the fitting portion 1 and the bending workpiece 4, and the pin component is used to be inserted into the corresponding waist-shaped hole 5 so as to limit the position of the bending workpiece 4 relative to the fitting portion 1 in a direction perpendicular to the bending upper mold 100.

[0063] In this embodiment, the waist-shaped hole 5 may be provided on the fitting portion 1;

[0064] The pin component may be a rivet nut 6 riveted on the bent workpiece 4 .

[0065] like Figures 3-5 As shown, after the bending workpiece 4 is bent, a bending line, a first bending portion 7 located on one side of the bending line, and a second bending portion 8 located on the other side of the bending line are formed; wherein,

[0066] The bonding portion 1 is used to bond to the first bending portion 7;

[0067] A bending groove 9 for the second bending portion 8 to pass through is provided between the fitting portion 1 and the abutting portion 2 .

[0068] like Figures 3-5 As shown, the abutting portion 2 can be connected to the fitting portion 1 through two connecting portions 10; wherein,

[0069] One end of the connecting portion 10 is connected to the fitting portion 1;

[0070] The other end of the connecting portion 10 is connected to the abutting portion 2;

[0071] The bending groove 9 is located between the fitting portion 1, the abutting portion 2 and the two connecting portions 10; in this embodiment, the distance between the two connecting portions 10 is greater than the length of the bending upper die 100 and the length of the bending lower die 200, respectively.

[0072] like Figures 3-5 As shown, the bent workpiece 4 may be provided with a left folding edge 11 and a right folding edge 12;

[0073] The fitting portion 1 may be provided with a left rib 13 and a right rib 14;

[0074] The left rib 13 is used to abut against the right end surface of the left folding edge 11 , and the right rib 14 is used to abut against the left end surface of the right folding edge 12 , so as to limit the position of the bent workpiece 4 relative to the fitting portion 1 in the length direction of the bending upper die 100 .

[0075] like Figures 3-5 As shown, the bending workpiece 4 may be provided with a process circular hole 15;

[0076] The bonding portion 1 may be provided with a detection groove 16, which is used to overlap with at least a portion of the process circular hole 15 when the bent workpiece 4 and the bonding portion 1 are installed in place, so as to detect whether the bent workpiece 4 and the bonding portion 1 are correctly installed.

[0077] Embodiment 2

[0078] like Figures 2~5 As shown, a bending method is implemented based on the bending positioning tool as described in Example 1, and the steps of the method include:

[0079] S1: Fitting the fitting portion 1 on the bending workpiece 4 and limiting the relative position between the bending workpiece 4 and the fitting portion 1 through the limiting mechanism 3;

[0080] S2: placing the bending workpiece 4 between the bending upper die 100 and the bending lower die 200, and abutting the abutting portion 2 against the positioning block 300;

[0081] S3: The bending upper die 100 and the bending lower die 200 are joined together to bend the bending workpiece 4 .

[0082] More specifically, Figures 2 to 6 As shown, the bent workpiece 4 has a first side portion 17, a second side portion 18, a third side portion 19, a fourth side portion 20, a fifth side portion 21, a sixth side portion 22 and a seventh side portion 23 which are connected in sequence after being bent.

[0083] The fourth side portion 20 is provided with a process circular hole 15;

[0084] The bonding portion 1 is provided with a detection groove 16, and the detection groove 16 is used to overlap with at least a part of the process circular hole 15 when the fourth edge portion 20 and the bonding portion 1 are installed in place;

[0085] The limiting mechanism 3 includes at least one waist-shaped hole 5, a first nut group 24 and a second nut group 25;

[0086] The waist-shaped hole 5 is provided on the fitting portion 1;

[0087] The first nut group 24 and the second nut group 25 are respectively arranged on the fourth side portion 20, and the first nut group 24 and the second nut group 25 respectively include riveted nuts 6 corresponding to the waist-shaped holes 5; in this embodiment, two waist-shaped holes 5 are provided on the fitting portion 1, and the first nut group 24 and the second nut group 25 respectively include two riveted nuts 6;

[0088] A first bending line 26 is formed between the first side portion 17 and the second side portion 18;

[0089] A second bending line 27 is formed between the second side portion 18 and the third side portion 19;

[0090] A third bending line 28 is formed between the third side portion 19 and the fourth side portion 20;

[0091] A fourth bending line 29 is formed between the fourth side portion 20 and the fifth side portion 21;

[0092] A fifth bending line 30 is formed between the fifth side portion 21 and the sixth side portion 22;

[0093] A sixth bending line 31 is formed between the sixth side portion 22 and the seventh side portion 23;

[0094] The steps of the method include:

[0095] M1: Take a riveted nut 6 and an unbent bent workpiece 4, rivet the riveted nut 6 on the bent workpiece 4 to form the first nut group 24 and the second nut group 25, and bend the bent workpiece 4 along the first bending line 26, the second bending line 27, the fifth bending line 30 and the sixth bending line 31 by the bending machine;

[0096] M2: attach the attaching portion 1 to the fourth edge portion 20, insert the rivet nut 6 in the first nut group 24 into the corresponding waist-shaped hole 5, and check whether the inspection groove 16 overlaps with at least a part of the process circular hole 15. If so, execute M3;

[0097] M3: placing the bending workpiece 4 between the bending upper die 100 and the bending lower die 200, abutting the abutting portion 2 against the positioning block 300, and closing the bending upper die 100 with the bending lower die 200 to bend the bending workpiece 4 along the third bending line 28;

[0098] M4: attach the attaching portion 1 to the fourth edge portion 20, insert the rivet nut 6 in the second nut group 25 into the corresponding waist-shaped hole 5, and check whether the inspection groove 16 overlaps with at least a part of the process circular hole 15. If so, execute M5;

[0099] M5: The bending workpiece 4 is placed between the bending upper die 100 and the bending lower die 200 , the abutting portion 2 is abutted against the positioning block 300 , and the bending upper die 100 and the bending lower die 200 are closed to bend the bending workpiece 4 along the fourth bending line 29 .

[0100] Specifically, in step M2 and step M5, if the detection groove 16 does not overlap with a portion of the process circular hole 15, the operation is terminated.

[0101] like Figure 6 As shown, the fourth side 20 is horizontally arranged, the first side 17, the third side 19, the fifth side 21 and the seventh side 23 are vertically arranged, and the second side 18 and the sixth side 22 are inclinedly arranged.

[0102] In this embodiment, the bending workpiece 4 is a steel plate with a thickness of 1mm, and the expansion coefficient of the 1mm steel plate is calculated as 1.7. After the bending workpiece 4 is bent and formed, the distance H between the upper end of the first side portion 17 and the fourth side portion 20 is 95mm, and the length L of the fourth side portion 20 is 280mm. The process circular hole 15 is located in the middle of the fourth side portion 20. Therefore, after unfolding, the distance D between the upper end of the first side portion 17 and the center of the process circular hole 15 is L÷2+H-1.7=233.3mm. After the fitting portion 1 is fitted on the fourth side portion 20, the distance S between the abutment portion 2 and the center of the process circular hole 15 is 290mm. Therefore, when bending along the third bending line 28, the bending height should be set to 290-233.3+95=151.7mm. Therefore, in step M2, it is also necessary to adjust the position of the positioning block 300 according to the bending height of 151.7mm.

[0103] The working principle of the present invention is as follows:

[0104] Take the riveted nut 6 and the unbent bending workpiece 4, rivet the riveted nut 6 on the bending workpiece 4 to form the first nut group 24 and the second nut group 25, and bend the bending workpiece 4 along the first bending line 26, the second bending line 27, the fifth bending line 30 and the sixth bending line 31 respectively by the bending machine. Then, the fitting portion 1 is fitted on the fourth edge portion 20, and the riveted nut 6 in the first nut group 24 is inserted into the corresponding waist-shaped hole 5, and it is checked whether the detection groove 16 overlaps with at least a part of the process circular hole 15. If they overlap, the bending workpiece 4 is placed between the bending upper die 100 and the bending lower die 200, and the abutting portion 2 is abutted on the positioning block 300, and the bending upper die 100 and the bending lower die 200 are molded together to bend the bending workpiece 4 along the third bending line 28. Then, the fitting portion 1 is fitted onto the fourth edge portion 20, and the riveted nut 6 in the second nut group 25 is inserted into the corresponding waist-shaped hole 5, and it is checked whether the detection groove 16 overlaps with at least a portion of the process circular hole 15. If they overlap, the bending workpiece 4 is placed between the bending upper die 100 and the bending lower die 200, and the abutting portion 2 is abutted against the positioning block 300. The bending upper die 100 and the bending lower die 200 are combined to bend the bending workpiece 4 along the fourth bending line 29. Positioning the bending workpiece 4 by the bending positioning tooling not only avoids the cumulative error caused by the inaccurate angle and size of the bending angle itself, but also avoids the positioning deviation caused by the elastic deformation of the bending angle, which greatly improves the positioning accuracy of the bending workpiece 4 on the bending machine, and improves the dimensional accuracy after bending and forming and the product qualification rate.

[0105] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0106] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0107] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0108] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0109] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0110] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A bending positioning tool, characterized in that: It comprises a fitting portion (1), an abutting portion (2) and a limiting mechanism (3), and is used in conjunction with a bending machine, wherein the bending machine comprises a bending upper die (100), a bending lower die (200) and a positioning block (300); The bonding portion (1) is used to bond to the bending workpiece (4); The abutting portion (2) is connected to the fitting portion (1), and the abutting portion (2) is used to abut against the positioning block (300) to limit the position of the fitting portion (1) relative to the bending upper die (100) at least in a direction perpendicular to the bending upper die (100); The limiting mechanism (3) is arranged between the fitting portion (1) and the bending workpiece (4) and is used to limit the position of the bending workpiece (4) relative to the fitting portion (1) at least in a direction perpendicular to the bending upper die (100); Wherein, the limiting mechanism (3) comprises at least one waist-shaped hole (5) and a pin component corresponding to the waist-shaped hole (5) and adapted to the corresponding waist-shaped hole (5); The waist-shaped hole (5) is provided on any one of the fitting portion (1) and the bending workpiece (4), and the length direction of the waist-shaped hole (5) is parallel to the length direction of the bending upper die (100); The pin component is arranged on the remaining one of the fitting portion (1) and the bending workpiece (4), and the pin component is used to be inserted into the corresponding waist-shaped hole (5); Wherein, after being bent, the bending workpiece (4) forms a bending line, a first bending portion (7) located on one side of the bending line, and a second bending portion (8) located on the other side of the bending line; The bonding portion (1) is used to bond to the first bending portion (7); A bending groove (9) is provided between the fitting portion (1) and the abutting portion (2) for the second bending portion (8) to pass through; Wherein, the bending workpiece (4) is provided with a process circular hole (15); The fitting portion (1) is provided with a detection groove (16), and the detection groove (16) is used to overlap with at least a part of the process circular hole (15) when the bent workpiece (4) and the fitting portion (1) are installed in place.

2. The bending and positioning tool according to claim 1, characterized in that: The waist-shaped hole (5) is arranged on the fitting portion (1); The pin component is a riveted nut (6) riveted on the bent workpiece (4).

3. The bending and positioning tool according to claim 1, characterized in that: The abutting portion (2) is connected to the fitting portion (1) via two connecting portions (10); wherein: One end of the connecting portion (10) is connected to the fitting portion (1); The other end of the connecting portion (10) is connected to the abutting portion (2); The bending groove (9) is located between the fitting portion (1), the abutting portion (2) and the two connecting portions (10).

4. The bending and positioning tool according to claim 1, characterized in that: The bent workpiece (4) is provided with a left folding edge (11) and a right folding edge (12); The fitting portion (1) is provided with a left rib (13) and a right rib (14); The left retaining edge (13) is used to abut against the right end face of the left folding edge (11), and the right retaining edge (14) is used to abut against the left end face of the right folding edge (12), so as to limit the position of the bent workpiece (4) relative to the fitting portion (1) in the length direction of the bending upper die (100).

5. A bending method, characterized in that: It is implemented based on the bending positioning tool as claimed in any one of claims 1 to 4, and the steps of the method include: S1: The bonding portion (1) is bonded and mounted on the bending workpiece (4), and the relative position between the bending workpiece (4) and the bonding portion (1) is limited by the limiting mechanism (3); S2: placing the bent workpiece (4) between the bending upper die (100) and the bending lower die (200), and causing the abutting portion (2) to abut against the positioning block (300); S3: The bending upper die (100) and the bending lower die (200) are combined to bend the bending workpiece (4).

6. The bending method according to claim 5, characterized in that: After being bent and formed, the bent workpiece (4) comprises a first side portion (17), a second side portion (18), a third side portion (19), a fourth side portion (20), a fifth side portion (21), a sixth side portion (22) and a seventh side portion (23) which are connected in sequence; The fourth side portion (20) is provided with a process circular hole (15); The bonding portion (1) is provided with a detection groove (16), and the detection groove (16) is used to overlap with at least a part of the process circular hole (15) when the fourth edge portion (20) and the bonding portion (1) are installed in place; The limiting mechanism (3) comprises at least one waist-shaped hole (5), a first nut group (24) and a second nut group (25); The waist-shaped hole (5) is arranged on the fitting portion (1); The first nut group (24) and the second nut group (25) are respectively arranged on the fourth side portion (20), and the first nut group (24) and the second nut group (25) respectively include a riveted nut (6) corresponding to the waist-shaped hole (5); A first bending line (26) is formed between the first side portion (17) and the second side portion (18); A second bending line (27) is formed between the second side portion (18) and the third side portion (19); A third bending line (28) is formed between the third side portion (19) and the fourth side portion (20); A fourth bending line (29) is formed between the fourth side portion (20) and the fifth side portion (21); A fifth bending line (30) is formed between the fifth side portion (21) and the sixth side portion (22); A sixth bending line (31) is formed between the sixth side portion (22) and the seventh side portion (23); The steps of the method include: M1: taking a riveted nut (6) and an unbent bent workpiece (4), riveting the riveted nut (6) onto the bent workpiece (4) to form the first nut group (24) and the second nut group (25), and bending the bent workpiece (4) along the first bending line (26), the second bending line (27), the fifth bending line (30), and the sixth bending line (31) respectively by means of the bending machine; M2: attach the fitting portion (1) to the fourth edge portion (20), insert the rivet nut (6) in the first nut group (24) into the corresponding waist-shaped hole (5), and check whether the inspection groove (16) overlaps with at least a part of the process circular hole (15). If so, execute M3; M3: placing the bending workpiece (4) between the bending upper die (100) and the bending lower die (200), abutting the abutting portion (2) against the positioning block (300), and closing the bending upper die (100) with the bending lower die (200) to bend the bending workpiece (4) along the third bending line (28); M4: attach the abutting portion (1) to the fourth edge portion (20), insert the rivet nut (6) in the second nut group (25) into the corresponding waist-shaped hole (5), and check whether the inspection groove (16) overlaps with at least a part of the process circular hole (15). If so, execute M5; M5: The bending workpiece (4) is placed between the bending upper die (100) and the bending lower die (200), the abutting portion (2) is abutted against the positioning block (300), and the bending upper die (100) and the bending lower die (200) are closed to bend the bending workpiece (4) along the fourth bending line (29).

7. The bending method according to claim 6, characterized in that: The fourth side (20) is arranged horizontally, the first side (17), the third side (19), the fifth side (21) and the seventh side (23) are arranged vertically, and the second side (18) and the sixth side (22) are arranged obliquely.

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