A profiled tube forming apparatus and a profiled tube forming method

Abstract

This invention discloses a special-shaped tube forming equipment and a special-shaped tube forming method. The special-shaped tube forming equipment includes a pretreatment module, a first stamping module, a second stamping module, and a transfer module. In the special-shaped tube forming equipment of this application, the transfer module can drive the material strip to move along a preset direction, so that the material strip can sequentially pass through the pretreatment module, the first stamping module, and the second stamping module. The pretreatment module can punch a plate-shaped blank on the material strip. The first stamping module can stamp the plate-shaped blank to form a semi-finished special-shaped tube with an axial opening. The second stamping module can stamp the semi-finished special-shaped tube to close the axial opening, thereby forming a finished special-shaped tube. Furthermore, the special-shaped tube forming equipment of this application can integrally form a finished special-shaped tube.

Description

Technical Field

[0001] This invention relates to the field of shaped tube forming technology, and in particular to a shaped tube forming equipment and a shaped tube forming method. Background Technology

[0002] For irregularly shaped tubes that have both square and curved segments, stretching as a one-piece forming method cannot be used in the forming process of such tubes.

[0003] In related technologies, when manufacturing shaped tubes, the square and arc segments of the shaped tube are stretched and formed separately, and then the square and arc segments are connected by welding to achieve the manufacturing of shaped tubes.

[0004] However, since the square and arc sections of the special-shaped tube are connected by welding, the overall integrity of the special-shaped tube is poor, and the junction of the square and arc sections is prone to breakage during use. Summary of the Invention

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. A first aspect of this invention provides a special-shaped tube forming device, which in this embodiment can integrally form special-shaped tubes. A second aspect of this invention also provides a special-shaped tube forming method.

[0006] According to a first aspect of the present invention, a special-shaped tube forming device includes a pretreatment module, a first stamping module, a second stamping module, and a transfer module. The pretreatment module is used to punch out a plate-shaped blank and two connecting parts on a strip, wherein the plate-shaped blank is connected to the strip at both ends in the width direction of the strip through the two connecting parts. The first stamping module is used to stamp the plate-shaped blank to form a semi-finished special-shaped tube with an axial opening. The second stamping module is used to stamp the cut semi-finished special-shaped tube to close the axial opening of the semi-finished special-shaped tube and form a finished special-shaped tube. The transfer module is used to drive the strip to move along a preset direction so that the strip passes through the pretreatment module, the first stamping module, and the second stamping module in sequence.

[0007] The shaped tube forming equipment of this invention has at least the following beneficial effects: In the shaped tube forming equipment of this application, the transfer module can drive the material strip to move along a preset direction, so that the material strip can sequentially pass through the pretreatment module, the first stamping module, and the second stamping module. The pretreatment module can punch and form a plate-shaped blank on the material strip. The first stamping module can stamp the plate-shaped blank to form a shaped tube semi-finished product with an axial opening. The second stamping module can stamp the shaped tube semi-finished product to close the axial opening, thereby forming the finished shaped tube. Furthermore, the shaped tube forming equipment of this application can integrally form the finished shaped tube.

[0008] According to the first aspect of the present invention, the special-shaped tube forming equipment includes a first stamping die assembly comprising a first upper stamping die and a first lower stamping die. The first lower stamping die includes a first punch and a second punch. The first upper stamping die includes a first die, a second die, a first driver, and a second driver. The first driver is connected to the first die and is used to drive the first die to approach the first punch to stamp an arc-shaped semi-finished segment of the special-shaped tube semi-finished product on the plate blank. The second driver is connected to the second die and is used to drive the second die to approach the second punch to stamp a square semi-finished segment of the special-shaped tube semi-finished product on the plate blank.

[0009] According to the first aspect of the embodiment of the special-shaped tube forming equipment, the first stamping upper die further includes a controller, which is electrically connected to the first driver and the second driver respectively. Under the control of the controller, the first driver can first drive the first die to cooperate with the first punch to stamp an arc-shaped semi-finished segment on the plate blank, and the second driver can then drive the second die to cooperate with the second punch to stamp a square semi-finished segment on the plate blank.

[0010] According to the first aspect of the present invention, the special-shaped tube forming equipment includes a second stamping die, a second stamping lower die, and a driving structure. The second stamping upper die includes an upper die base and an upper mold, with the upper mold disposed on the upper die base. The second stamping lower die includes a lower mold, a lower die base, a first inner support structure, and a second inner support structure. The lower mold, the first inner support structure, and the second inner support structure are all disposed on the lower die base, and the first inner support structure and the second inner support structure are respectively disposed on both sides of the lower die in the direction of the strip width. The first inner support structure is used to provide inner support for the arc-shaped semi-finished product segment, and the second inner support structure is used to provide inner support for the square semi-finished product segment. The driving structure is connected to the upper die base and is used to drive the upper die base to approach the lower die base, so that the upper die cooperates with the lower die to stamp the special-shaped tube semi-finished product into a finished special-shaped tube.

[0011] According to the first aspect of the present invention, the special-shaped tube forming equipment includes a pre-processing module comprising a first cutting component and a second cutting component distributed along a preset direction. The first cutting component is used to punch out a plate-shaped blank and two connecting parts on the strip, and the second cutting component is used to punch out a deformation seam extending along the preset direction on the connecting parts, so that the connecting parts can generate elastic deformation in the vertical direction.

[0012] According to the first aspect of the present invention, the special-shaped tube forming equipment includes a transfer module comprising a lifting structure and two parallel conveyor lines. The conveyor lines extend along a preset direction and are used to carry the edge of the material strip and can drive the material strip to move along the preset direction. The pretreatment module, the first stamping module and the second stamping module are both disposed between the two conveyor lines. The lifting structure is connected to the two conveyor lines respectively and is used to drive the two conveyor lines to perform lifting movements.

[0013] The shaped tube forming method according to the second aspect of the present invention is applied to the shaped tube forming equipment according to the first aspect of the present invention. The shaped tube forming method includes the following steps:

[0014] A plate-shaped blank and two connecting parts are punched out on the strip. The plate-shaped blank is connected to the strip at both ends in the width direction of the strip through the two connecting parts.

[0015] The sheet blank is stamped to form a semi-finished tube with an axial opening;

[0016] The semi-finished special-shaped tube is stamped to close the axial opening of the semi-finished special-shaped tube and form the finished special-shaped tube.

[0017] According to the second aspect of the present invention, the method for forming irregular tubes involves stamping a plate-shaped blank, comprising the following steps:

[0018] The first die is driven to work with the first punch to stamp an arc-shaped semi-finished section out of the plate blank;

[0019] The second die is driven to work with the second punch to press out a square semi-finished section from the plate blank with the arc-shaped semi-finished section. The arc-shaped semi-finished section and the square semi-finished section together constitute the special-shaped tube semi-finished product.

[0020] According to the second aspect of the present invention, the method for forming irregular tubes includes stamping a semi-finished irregular tube, comprising the following steps:

[0021] The arc-shaped semi-finished section is internally supported by the first internal support structure;

[0022] The square semi-finished section is internally supported by a second internal support structure.

[0023] Drive the upper mold base closer to the lower mold base so that the upper mold cooperates with the lower mold to stamp the semi-finished special-shaped tube into the finished special-shaped tube.

[0024] According to the second aspect of the present invention, the method for forming irregular tubes further includes the following steps before stamping the plate blank:

[0025] A deformation seam is punched into the connection part so that the connection part can generate elastic deformation in the vertical direction.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is a schematic diagram of the structure of a special-shaped tube forming device according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partially enlarged view of the structure at point A of the irregular tube forming equipment shown;

[0030] Figure 3 for Figure 1 A schematic diagram of the first stamping die of the irregular tube forming equipment shown;

[0031] Figure 4 for Figure 1 The diagram shows the structure of the first stamping upper die of the irregular tube forming equipment;

[0032] Figure 5 for Figure 1 A schematic diagram of the second stamping die of the irregular tube forming equipment shown;

[0033] Figure 6 for Figure 1 The diagram shows the structure of the second stamping upper die of the irregular tube forming equipment;

[0034] Figure 7 This is a schematic diagram of the material strip structure according to an embodiment of the present invention;

[0035] Figure 8 This is a flowchart of a method for forming irregular tubes according to an embodiment of the present invention;

[0036] Figure 9 This is a flowchart of a stamping process for a plate-shaped blank according to an embodiment of the present invention;

[0037] Figure 10 This is a flowchart illustrating the stamping process of a semi-finished shaped tube according to an embodiment of the present invention.

[0038] Figure label:

[0039] 10. Irregularly shaped tube; 11. Arc-shaped segment; 12. Square segment;

[0040] 20. Irregularly shaped tube semi-finished product; 21. Arc-shaped semi-finished product section; 22. Square semi-finished product section; 20a. Axial opening;

[0041] 30; strip; 31; connecting part;

[0042] Pre-processing module 100; first cutting assembly 110; first punching upper die 111; first punching lower die 112; second cutting assembly 120; second punching upper die 121; second punching lower die 122;

[0043] First stamping die 200; first upper stamping die 210; first die 211; second die 212; first lower stamping die 220; first punch 221; second punch 222;

[0044] Second stamping die 300; Second upper stamping die 310; Upper die base 311; Upper mold 312; First drive block 313; Second drive block 314; Second lower stamping die 320; Lower mold 321; Lower die base 322; First inner support structure 323; First mounting base 323a; First inner support block 323b; First abutting inclined surface 323c; Second inner support structure 324; Second mounting base 324a; Second inner support block 324b;

[0045] Transfer module 400; Lifting structure 410; Conveyor line 420;

[0046] 500 punching module;

[0047] Punching module 600; punching assembly 610. Detailed Implementation

[0048] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0050] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0051] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0052] The following is for reference. Figures 1 to 7The special-shaped tube forming equipment of the first aspect of this application will be described in detail.

[0053] It should be noted that the reference Figure 7 The shaped tube 10 has a square segment 12 and an arc segment 11 connected together. The square segment 12 has a square cross-section, and the arc segment 11 has a circular cross-section. In traditional manufacturing processes, the square segment 12 and the arc segment 11 of the shaped tube 10 are stretched and shaped separately, and then welded together to form the finished shaped tube 10. However, because the square segment 12 and the arc segment 11 are connected by welding, a large amount of stress is generated at the junction of the square segment 12 and the arc segment 11 during the use of the shaped tube 10. Consequently, the junction of the square segment 12 and the arc segment 11 is prone to breakage.

[0054] refer to Figure 1 According to an embodiment of the present invention, the special-shaped tube forming equipment includes a pretreatment module 100, a first stamping module 200, a second stamping module 300, and a transfer module 400; the pretreatment module 100, the first stamping module 200, and the second stamping module 300 are arranged sequentially from front to back.

[0055] refer to Figure 1 and Figure 7 In this embodiment, when the special-shaped tube forming equipment is working, the material strip 30 can move from front to back under the drive of the transfer module 400. When the material strip 30 moves to the pre-processing module 100, the pre-processing module 100 can punch the material strip 30 to form a plate blank 31 and two connecting parts 32 on the material strip 30. The left and right ends of the plate blank 31 are respectively connected to the blank through a connecting part 32. Then, the transfer module 400 can continue to drive the material strip 30 to move backward so that the plate blank 31 moves from the pre-processing module 100 to the first stamping module 200. At the first stamping module 200, the first stamping module 200 can stamp the plate blank 31 to form a special-shaped tube semi-finished product 20 with an axial opening 20a. The axial opening 20a of the special-shaped tube semi-finished product 20 extends in the left and right direction and the opening of the axial opening 20a faces downward. Then, driven by the transfer module 400, the shaped tube semi-finished product 20 continues to move backward to the second stamping module 300. Under the stamping of the second stamping module 300, the axial opening 20a of the shaped tube semi-finished product 20 can be closed to form the finished shaped tube 10.

[0056] It is understood that in the shaped tube forming equipment of the present invention, under the drive of the transfer module 400, the strip 30 can sequentially pass through the pretreatment module 100, the first stamping module 200, and the second stamping module 300, so that the pretreatment module 100, the first stamping module 200, and the second stamping module 300 can cooperate with each other to stamp the finished shaped tube 10 on the strip 30. Since the shaped tube 10 is manufactured by stamping integrally through the shaped tube forming equipment of the present invention, the structure at the junction of the square segment 12 and the arc segment 11 of the shaped tube 10 is more robust.

[0057] It is understood that, since the shaped tube 10 is formed by stamping on the strip 30 in the shaped tube forming equipment of the present invention, the transfer module 400 can move the strip 30 along the preset direction by driving it, thereby realizing the movement of the plate blank 31 between the pretreatment module 100 and the first stamping module 200, and realizing the movement of the shaped tube semi-finished product 20 between the first stamping module 200 and the second stamping module 300.

[0058] It should be noted that, since the special-shaped tube 10 has a square segment 12 and an arc segment 11, the square segment 12 and the arc segment 11 have significant structural differences, and the special-shaped tube semi-finished product 20 is stamped from a whole plate blank 31, if a whole punch and a whole die are used to stamp the plate blank 31, more wrinkles will be generated at the junction of the arc semi-finished product segment 21 and the square semi-finished product segment 22 of the special-shaped tube semi-finished product 20.

[0059] Based on the above problems, in some embodiments of the present invention, reference is made to Figure 1 , Figure 3 and Figure 4 The first stamping die 200 includes a first upper stamping die 210 and a first lower stamping die 220. The first lower stamping die 220 includes a first punch 221 and a second punch 222. The first upper stamping die 210 includes a first die 211, a second die 212, a first driver, and a second driver. The first driver is connected to the first die 211 and is used to drive the first die 211 to approach the first punch 221 to stamp an arc-shaped semi-finished segment 21 of the shaped tube semi-finished product 20 on the plate blank 31. The second driver is connected to the second die 212 and is used to drive the second die 212 to approach the second punch 222 to stamp a square semi-finished segment 22 of the shaped tube semi-finished product 20 on the plate blank 31.

[0060] It is understood that in the first stamping die 200 of this embodiment, under the drive of the first driver, the first punch 221 can cooperate with the first die 211 to stamp out the arc-shaped semi-finished segment 21 of the shaped tube semi-finished product 20 on the plate blank 31. Under the drive of the second driver, the second punch 222 can cooperate with the second die 212 to stamp out the square semi-finished segment 22 of the shaped tube semi-finished product 20 on the plate blank 31, so that the square semi-finished segment 22 and the arc-shaped semi-finished segment 21 of the shaped tube semi-finished product 20 can be stamped and formed respectively, so as to reduce the generation of wrinkles at the junction of the arc-shaped semi-finished segment 21 and the square semi-finished segment 22 of the shaped tube semi-finished product 20.

[0061] It should be noted that, since the square semi-finished section 22 of the shaped tube semi-finished product 20 has many axial streaks, and the arc-shaped semi-finished section 21 of the shaped tube semi-finished product 20 needs to reduce the generation of axial streaks, accordingly, when the second punch 222 cooperates with the second die 212 to stamp the square semi-finished section 22 on the plate blank 31, the second punch 222 needs to cooperate with the second die 212 to stamp the axial streaks on the plate blank 31; during the stamping process of the first stamping die 200 on the plate blank 31, If the second punch 222 first works with the second die 212 to stamp a square semi-finished section 22 on the plate blank 31, the axial streaks on the square semi-finished section 22 will extend to other areas of the plate blank 31. When the first punch 221 works with the first die 211 to stamp an arc-shaped semi-finished section 21 on the plate blank 31, the axial streaks on the plate blank 31 will still exist on the arc-shaped semi-finished section 21, thus affecting the quality of the shaped tube semi-finished product 20 stamped by the first stamping die 200.

[0062] Based on the above problems, in a further embodiment of the present invention, the first stamping upper die 210 further includes a controller, which is electrically connected to the first driver and the second driver respectively. Under the control of the controller, the first driver can first drive the first die 211 to cooperate with the first punch 221 to stamp an arc-shaped semi-finished product segment 21 on the plate blank 31, and the second driver can then drive the second die 212 to cooperate with the second punch 222 to stamp a square semi-finished product segment 22 on the plate blank 31.

[0063] Furthermore, in the first stamping module 200 of this embodiment, by setting a controller, and the controller being electrically connected to the first driver and the second driver respectively, during the stamping process of the first stamping module 200 on the plate blank 31, under the control of the controller, the first driver can first drive the first die 211 to cooperate with the first punch 221 to stamp the plate blank 31 to form the arc-shaped semi-finished product segment 21 of the shaped tube semi-finished product 20, and then the second driver can drive the second die 212 to cooperate with the second punch 222 to stamp the plate blank 31 to form the square semi-finished product segment 22 of the shaped tube semi-finished product 20.

[0064] It is understandable that since the arc-shaped semi-finished section 21 on the irregular tube semi-finished product 20 can be stamped out preferentially than the square semi-finished section 22, the generation of axial streaks on the arc-shaped semi-finished section 21 can be reduced.

[0065] In some embodiments of the present invention, the first punch 221 and the second punch 222 are arranged along the width direction of the strip 30 and are integrally formed.

[0066] It is understandable that since the first punch 221 and the second punch 222 are made of the same material, the first punch 221 and the second punch 222 can be manufactured simultaneously using a one-piece molding process such as injection molding, thereby reducing the manufacturing difficulty of the first punch 221 and the second punch 222.

[0067] It should be noted that, since the shaped tube semi-finished product 20 has a hollow internal structure, when the second stamping die 300 stamps and closes the axial opening 20a of the shaped tube semi-finished product 20, it is necessary to minimize the degree of deformation of the tube wall caused by the second stamping die 300 to the shaped tube semi-finished product 20.

[0068] For the reasons stated above, in some embodiments of the present invention, reference is made to... Figure 1 , Figure 5 and Figure 6 The second stamping die 300 includes a second upper stamping die 310, a second lower stamping die 320, and a driving structure. The second upper stamping die 310 includes an upper die base 311 and an upper die 312, with the upper die 312 mounted on the upper die base 311. The second lower stamping die 320 includes a lower die 321, a lower die base 322, a first inner support structure 323, and a second inner support structure 324, all of which are mounted on the lower die base 322. Furthermore, the first inner support structure 323 and the second inner support structure 324 are respectively provided on both sides of the lower mold 321 in the left and right direction. The first inner support structure 323 is used to provide inner support for the arc-shaped semi-finished product segment 21, and the second inner support structure 324 is used to provide inner support for the square semi-finished product segment 22. The driving structure is connected to the upper mold base 311 and is used to drive the upper mold base 311 to approach the lower mold base 322 so that the upper mold 312 cooperates with the lower mold 321 to stamp the irregular tube semi-finished product 20 into the finished irregular tube 10.

[0069] Understandably, after the transfer module 400 transfers the shaped tube semi-finished product 20 onto the lower die 321, the first inner support structure 323 can extend into the arc-shaped semi-finished product segment 21 of the shaped tube semi-finished product 20 to provide inner support for the arc-shaped semi-finished product segment 21 of the shaped tube semi-finished product 20, and the second inner support structure 324 can extend into the square semi-finished product segment 22 of the shaped tube semi-finished product 20 to provide inner support for the square semi-finished product segment 22 of the shaped tube semi-finished product 20. Then, the driving structure can drive the second stamping upper die 310 to approach the second stamping lower die 320. Under the action of the upper die 312 and the lower die 321, the shaped tube semi-finished product 20 is stamped to form the finished shaped tube 10.

[0070] Understandably, the first inner support structure 323 and the second inner support structure 324 are configured such that the first inner support structure 323 can provide inner support for the arc-shaped semi-finished section 21 of the shaped tube semi-finished product 20, and the second inner support structure 324 can provide inner support for the square semi-finished section 22 of the shaped tube semi-finished product 20. This reduces the deformation of the tube wall of the shaped tube semi-finished product 20 during the stamping process of the upper mold 312 and the lower mold 321, thereby improving the quality of the finished shaped tube 10 stamped by the second stamping die 300.

[0071] In a further embodiment of the invention, reference is made to... Figure 5 and Figure 6 The first inner support structure 323 includes a first mounting base 323a and a first inner support block 323b. The first mounting base 323a is slidably disposed on the lower mold base 322 in the left-right direction, and the first mounting base 323a is provided with a first abutting inclined surface 323c. The first inner support block 323b is disposed on the first mounting base 323a and is used to support the arc-shaped semi-finished product section 21. The upper mold base 311 is provided with a first driving block 313. During the process of the driving structure driving the upper mold base 311 downward to approach the lower mold base 322, the first driving block 313 can push the first mounting base 323a closer to the lower mold 321 through the first abutting inclined surface 323c.

[0072] Furthermore, during the process of driving the upper mold base 311 downward towards the lower mold base 322, the first driving block 313 can push the first mounting base 323a closer to the lower mold 321 through the first abutting inclined surface 323c, so that the first inner support block 323b on the first mounting base 323a extends into the arc-shaped semi-finished section 21 of the shaped tube semi-finished product 20 to provide inner support for the arc-shaped semi-finished section 21 of the shaped tube semi-finished product 20.

[0073] Understandably, the setting of the first abutting inclined surface 323c allows the first mounting base 323a and the upper die base 311 to share the drive structure as the drive source, thereby reducing the number of drive sources installed in the second stamping module 300.

[0074] In a further embodiment of the present invention, in order to achieve the reset of the first mounting base 323a, the first inner support structure 323 further includes a first elastic reset member, which is connected to the first mounting base 323a and the lower mold base 322 respectively, and is used to provide an elastic reset force to move the first mounting base 323a away from the lower mold 321.

[0075] In some other embodiments of the present invention, without considering the number of drive sources installed, the first inner support structure 323 includes a cylinder, a first mounting base 323a and a first inner support block 323b. In this case, the first inner support block 323b is disposed on the first mounting base 323a, the cylinder is connected to the first mounting base 323a and is used to drive the first mounting base 323a to move in the left and right direction, so that the first inner support block 323b on the first mounting base 323a moves closer to or further away from the lower mold 321.

[0076] In some embodiments of the present invention, reference is made to Figure 5 and Figure 6 The second inner support structure 324 includes a second mounting base 324a and a second inner support block 324b. The second mounting base 324a is slidably disposed on the lower mold base 322 in the left-right direction, and the second mounting base 324a is provided with a second abutting inclined surface. The second inner support block 324b is disposed on the second mounting base 324a and is used to internally support the square semi-finished product segment 22. The upper mold base 311 is provided with a second driving block 314. During the process of the driving structure driving the upper mold base 311 downward to approach the lower mold base 322, the second driving block 314 can push the second mounting base 324a closer to the lower mold 321 through the second abutting inclined surface.

[0077] In a further embodiment of the present invention, in order to achieve the reset of the second mounting base 324a, the second inner support structure 324 further includes a second elastic reset member, which is connected to the second mounting base 324a and the lower mold base 322 respectively, and is used to provide an elastic reset force to move the second mounting base 324a away from the lower mold 321.

[0078] In some embodiments of the present invention, reference is made to Figure 1 The pre-processing module 100 includes a first cutting component 110 and a second cutting component 120 distributed along a preset direction. The first cutting component 110 is used to punch out a plate-shaped blank 31 and two connecting parts 32 on the strip 30. The second cutting component 120 is used to punch out a deformation seam extending along a preset direction on the connecting parts 32 so that the connecting parts 32 can generate elastic deformation in the vertical direction.

[0079] It should be noted that the reference Figure 7 When the irregular tube semi-finished product 20 is placed horizontally, the arc-shaped semi-finished product section 21 and the square semi-finished product section 22 on the irregular tube semi-finished product 20 are located at different horizontal heights.

[0080] It is understandable that, since the second cutting component 120 can punch a deformation seam extending in the front-back direction on the connecting part 32, the connecting part 32 can deform in the vertical direction, thereby allowing the arc-shaped semi-finished section 21 and the square semi-finished section 22 of the shaped tube semi-finished product 20 to be staggered in the vertical direction.

[0081] For details, please refer to Figure 1 The first cutting assembly 110 includes a first upper punching die 111, a first lower punching die 112, and a first vertical driver. The first upper punching die 111 is provided with a first cutting edge. The first vertical driver is connected to the first upper punching die 111 and is used to drive the first upper punching die 111 to approach the first lower punching die 112 in the vertical direction, so that the first cutting edge can punch and form a plate-shaped blank 31 and two connecting parts 32 on the strip 30.

[0082] For details, please refer to Figure 1 The second cutting assembly 120 includes a second upper punching die 121, a second lower punching die 122, and a second vertical driver. The second upper punching die 121 is provided with a second cutting edge. The second vertical driver is connected to the second upper punching die 121 and is used to drive the second upper punching die 121 to approach the second lower punching die 122 in the vertical direction, so that the second cutting edge can punch a deformation seam on the connecting part 32.

[0083] In some embodiments of the present invention, reference is made to Figure 1 and Figure 2 The transfer module 400 includes a lifting structure 410 and two parallel conveyor lines 420. The conveyor lines 420 extend in the front-to-back direction. The two conveyor lines 420 are used to carry the left and right edges of the material belt 30, respectively. The conveyor lines 420 can drive the material belt 30 to move from front to back. The pre-processing module 100, the first stamping module 200 and the second stamping module 300 are all located between the two conveyor lines 420. The lifting structure 410 is connected to the two conveyor lines 420 respectively and is used to drive the two conveyor lines 420 to perform lifting and lowering movements.

[0084] Understandably, before the conveyor line 420 drives the material belt 30 to move backward, the lifting structure 410 can drive the conveyor line 420 to move upward, so that the material belt 30 can move upward a certain distance, thereby allowing the plate blank 31 on the first punching die 112 to detach upward from the first punching die 112, the plate blank 31 on the second punching die 122 to detach upward from the second punching die 122, the shaped tube semi-finished product 20 on the first punch 221 and the second punch 222 to detach upward from the first punch 221 and the second punch 222, and the finished shaped tube 10 on the lower die 321 to detach upward from the lower die 321.

[0085] In a further embodiment of the invention, the lifting structure 410 includes a plurality of nitrogen springs, and each conveyor line 420 is connected to at least one nitrogen spring.

[0086] In some embodiments of the present invention, in order to drill holes in the finished shaped tube 10, reference is made to... Figure 1 The special-shaped tube forming equipment also includes a punching module 500, which is located behind the second stamping module 300. The punching module 500 is used to punch holes in the finished special-shaped tube 10.

[0087] It should be noted that after the first stamping die 200 stamps the plate blank 31 into a shaped tube semi-finished product 20, there are still some excess material on the shaped tube semi-finished product 20 that needs to be removed. If these excess materials are punched and removed after the second stamping die 300 stamps the shaped tube semi-finished product 20 into a finished shaped tube 10, it is easy to cause deformation of the tube wall of the finished shaped tube 10.

[0088] Based on the above problems, in some embodiments of the present invention, reference is made to Figure 1 The special-shaped tube forming equipment also includes a punching module 600, which is located between the first stamping module 200 and the second stamping module 300, and is used to punch the special-shaped tube semi-finished product 20.

[0089] It is understood that by setting a punching module 600 between the first stamping module 200 and the second stamping module 300, the punching module 600 can punch the semi-finished tube 20 to remove excess material. The deformation generated on the semi-finished tube 20 when the punching module 600 punches it can be recovered when the second stamping module 300 punches it, thereby making the semi-finished tube 10 manufactured by the tube forming equipment of the present invention have better quality.

[0090] In a further embodiment of the invention, reference is made to... Figure 1 The punching module 600 includes multiple punching components 610 distributed along the front-back direction. The multiple punching components 610 can cooperate to gradually punch away the excess material on the shaped tube semi-finished product 20.

[0091] The following is for reference. Figures 7 to 10 The method for forming irregular tubes according to the second aspect of this application will be described in detail.

[0092] refer to Figure 8 The method for forming irregular tubes according to a second aspect embodiment of the present invention includes, but is not limited to, the following steps:

[0093] Step S100: A plate-shaped blank 31 and two connecting parts 32 are punched out on the strip 30, wherein the two ends of the plate-shaped blank 31 in the width direction of the strip 30 are respectively connected to the strip 30 through the two connecting parts 32.

[0094] Step S300: Stamp the plate blank 31 to form a shaped tube semi-finished product 20 with an axial opening;

[0095] Step S400: Stamp the shaped tube semi-finished product 20 to close the axial opening of the shaped tube semi-finished product 20 and form the finished shaped tube 10.

[0096] Understandably, a plate-shaped blank 31 and two connecting parts 32 are first punched out on the strip 30. The plate-shaped blank 31 is connected to the strip 30 at both ends in the width direction through the two connecting parts 32. Then, the plate-shaped blank 31 is stamped to form a shaped tube semi-finished product 20 with an axial opening. Then, the shaped tube semi-finished product 20 is stamped to close the axial opening and form the finished shaped tube 10. Thus, the shaped tube forming method of this application can stamp the shaped tube 10 on the strip 30, and the arc-shaped segment 11 and the square segment 12 of the shaped tube 10 are integrally formed. This can reduce the stress at the junction of the arc-shaped segment 11 and the square segment 12 in the shaped tube 10 manufactured by the shaped tube forming method of this application, so that the shaped tube 10 manufactured by the shaped tube forming method of this application has higher strength and better quality.

[0097] In some embodiments of the present invention, reference is made to Figure 9 Step S300 includes, but is not limited to, the following steps:

[0098] Step S310: Drive the first die 211 to cooperate with the first punch 221 to stamp out an arc-shaped semi-finished product segment 21 on the plate blank 31;

[0099] Step S320: Drive the second concave die 212 to cooperate with the second convex die 222 to punch out a square semi-finished section 22 on the plate blank 31 with the arc-shaped semi-finished section 21. The arc-shaped semi-finished section 21 and the square semi-finished section 22 together constitute the irregular tube semi-finished product 20.

[0100] It should be noted that, since the square semi-finished section 22 of the shaped tube semi-finished product 20 has many axial scratches, while the arc-shaped semi-finished section 21 of the shaped tube semi-finished product 20 does not have axial scratches, correspondingly, when the second punch 222 cooperates with the second die 212 to stamp the square semi-finished section 22 on the plate blank 31, the second punch 222 needs to cooperate with the second die 212 to stamp the axial scratches on the plate blank 31; during the stamping process of the first stamping die 200 on the plate blank 31, if the second punch 222 cooperates with the second die 212 to stamp the axial scratches on the plate blank 31, the second punch 222 needs to cooperate with the second die 212 to stamp the axial scratches on the plate blank 31. The second punch 222 first works with the second die 212 to stamp a square semi-finished section 22 on the plate blank 31. This causes the axial streaks on the square semi-finished section 22 to extend to other areas of the plate blank 31. When the first punch 221 works with the first die 211 to stamp an arc-shaped semi-finished section 21 on the plate blank 31, the axial streaks on the plate blank 31 will still exist on the arc-shaped semi-finished section 21, thus affecting the quality of the shaped tube semi-finished product 20 stamped by the first stamping die 200.

[0101] It is understandable that the first die 211 is driven to work with the first punch 221 to stamp an arc-shaped semi-finished section 21 on the plate blank 31. Then, the second die 212 is driven to work with the second punch 222 to stamp a square semi-finished section 22 on the plate blank 31 with the arc-shaped semi-finished section 21. The arc-shaped semi-finished section 21 and the square semi-finished section 22 together constitute the shaped tube semi-finished product 20. Since the arc-shaped semi-finished section 21 on the shaped tube semi-finished product 20 can be stamped out first, the generation of axial scratches on the arc-shaped semi-finished section 21 can be reduced.

[0102] In some embodiments of the present invention, reference is made to Figure 10 Step S400 includes, but is not limited to, the following steps:

[0103] Step S410: The arc-shaped semi-finished section 21 is internally supported by the first internal support structure 323;

[0104] Step S420: The square semi-finished section 22 is internally supported by the second internal support structure 324;

[0105] Step S430: Drive the upper mold base 311 to approach the lower mold base 322, so that the upper mold 312 cooperates with the lower mold 321 to stamp the shaped tube semi-finished product 20 into the finished shaped tube 10.

[0106] It is understandable that the first inner support structure 323 first supports the arc-shaped semi-finished section 21, and then the second inner support structure 324 supports the square semi-finished section 22. Thus, when the upper mold 312 cooperates with the lower mold 321 to stamp the irregular tube semi-finished product 20, the first inner support structure 323 and the second inner support structure 324 can reduce the degree of inward indentation of the arc-shaped semi-finished section 21 and the square semi-finished section 22.

[0107] In some embodiments of the present invention, reference is made to Figure 8 Before step S300, the following steps may also be included, but are not limited to:

[0108] Step S200: A deformation seam is punched out on the connecting part 32 so that the connecting part 32 can generate elastic deformation in the vertical direction.

[0109] It should be noted that the reference Figure 7 When the irregular tube semi-finished product 20 is placed horizontally, the arc-shaped semi-finished product section 21 and the square semi-finished product section 22 on the irregular tube semi-finished product 20 are located at different horizontal heights.

[0110] It is understandable that by punching a deformation seam on the connecting part 32, the connecting part 32 can deform in the vertical direction, thereby allowing the arc-shaped semi-finished section 21 and the square semi-finished section 22 of the special-shaped tube semi-finished product 20 to be staggered in the vertical direction.

[0111] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A special-shaped tube forming equipment, characterized in that, include: A pre-processing module is used to punch out a plate-shaped blank and two connecting parts on a strip, wherein the plate-shaped blank is connected to the strip at both ends in the width direction of the strip through the two connecting parts respectively; The first stamping die is used to stamp the plate blank to form a shaped tube semi-finished product with an axial opening. The second stamping module is used to stamp the semi-finished special-shaped tube to close the axial opening of the semi-finished special-shaped tube and form the finished special-shaped tube. A transfer module is used to drive the strip to move along a preset direction so that the strip passes through the pretreatment module, the first stamping module and the second stamping module in sequence; The first stamping die assembly includes a first upper stamping die and a first lower stamping die. The first lower stamping die includes a first punch and a second punch. The first upper stamping die includes a first die, a second die, a first driver, and a second driver. The first driver is connected to the first die and is used to drive the first die to approach the first punch, so as to stamp an arc-shaped semi-finished segment of the shaped tube semi-finished product on the plate blank. The second driver is connected to the second die and is used to drive the second die to approach the second punch, so as to stamp a square semi-finished segment of the shaped tube semi-finished product on the plate blank. The first stamping die also includes a controller, which is electrically connected to the first driver and the second driver respectively. Under the control of the controller, the first driver can first drive the first die to cooperate with the first punch to stamp the arc-shaped semi-finished product segment on the plate blank, and the second driver can then drive the second die to cooperate with the second punch to stamp the square semi-finished product segment on the plate blank.

2. The special-shaped tube forming equipment according to claim 1, characterized in that, The second stamping die assembly includes a second upper stamping die, a second lower stamping die, and a driving structure. The second upper stamping die includes an upper die base and an upper mold, with the upper mold disposed on the upper die base. The second lower stamping die includes a lower mold, a lower die base, a first inner support structure, and a second inner support structure. The lower mold, the first inner support structure, and the second inner support structure are all disposed on the lower die base, and the first inner support structure and the second inner support structure are respectively disposed on both sides of the lower die in the width direction of the strip. The first inner support structure is used to provide inner support for the arc-shaped semi-finished product segment, and the second inner support structure is used to provide inner support for the square semi-finished product segment. The driving structure is connected to the upper die base and is used to drive the upper die base closer to the lower die base, so that the upper die cooperates with the lower die to stamp the shaped tube semi-finished product into the finished shaped tube.

3. The special-shaped tube forming equipment according to claim 1, characterized in that, The preprocessing module includes a first cutting component and a second cutting component distributed along the preset direction. The first cutting component is used to punch out the plate-shaped blank and two connecting parts on the strip. The second cutting component is used to punch out a deformation seam extending along the preset direction on the connecting parts so that the connecting parts can deform in the vertical direction.

4. The special-shaped tube forming equipment according to claim 1, characterized in that, The transfer module includes a lifting structure and two parallel conveyor lines. The conveyor lines extend along the preset direction and are used to support the edge of the material strip and drive the material strip to move along the preset direction. The pre-processing module, the first stamping module, and the second stamping module are all located between the two conveyor lines. The lifting structure is connected to the two conveyor lines respectively and is used to drive the two conveyor lines to perform lifting movements.

5. A method for forming irregularly shaped tubes, characterized in that, Applied to the shaped tube forming equipment as described in claim 2, the shaped tube forming method includes the following steps: A plate-shaped blank and two connecting parts are punched out on the strip, wherein the plate-shaped blank is connected to the strip at both ends in the width direction of the strip through the two connecting parts respectively; The plate-shaped blank is stamped to form a semi-finished tube with an axial opening; The semi-finished shaped tube is stamped to close the axial opening of the semi-finished shaped tube and form the finished shaped tube.

6. The method for forming a special-shaped tube according to claim 5, characterized in that, The stamping of the plate-shaped blank includes the following steps: The first concave die, in conjunction with the first convex die, stamps an arc-shaped semi-finished segment onto the plate blank. The second concave die is driven to cooperate with the second convex die to stamp out the square semi-finished section on the plate blank having the arc-shaped semi-finished section. The arc-shaped semi-finished section and the square semi-finished section together constitute the special-shaped tube semi-finished product.

7. The method for forming a special-shaped tube according to claim 6, characterized in that, The stamping of the semi-finished shaped tube includes the following steps: The arc-shaped semi-finished section is internally supported by a first internal support structure. The square semi-finished section is internally supported by a second internal support structure. The upper mold base is driven to approach the lower mold base so that the upper mold cooperates with the lower mold to stamp the semi-finished special-shaped tube into the finished special-shaped tube.

8. The method for forming a special-shaped tube according to claim 5, characterized in that, Before stamping the plate-shaped blank, the following steps are also included: A deformation seam is punched into the connecting part so that the connecting part can deform in the vertical direction.

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