Upsetting ring equipment and upsetting ring process for refrigeration pipe joints

Abstract

The present application discloses an upsetting ring device and an upsetting ring process for a refrigeration pipe joint, and relates to the processing field of refrigeration pipe joints. The upsetting ring device for a refrigeration pipe joint of the present application comprises an upsetting mechanism and an upsetting ring mechanism; the upsetting mechanism comprises a first bearing seat, a first moving seat, a first driving assembly, a first upsetting die and a second upsetting die, and an upsetting groove is provided on the second upsetting die; the upsetting ring mechanism comprises a second bearing seat, a second moving seat, a second driving assembly, a first upsetting ring die, a second upsetting ring die and a third upsetting ring die, and a first upsetting ring groove is provided on the first upsetting ring die, an upsetting ring rod is provided in the first upsetting ring groove, and a second upsetting ring groove is provided on the third upsetting ring die. The upsetting ring equipment of the present application, the upsetting mechanism and the upsetting ring mechanism thereon can cooperate with each other and integrally form a joint with an upsetting ring and a straight pipe section at the pipe end of the refrigeration pipe, thereby effectively improving the sealing performance of the refrigeration pipe; at the same time, there is no need to use welding technology, thereby improving the processing efficiency of the refrigeration pipe joint.

Description

Technical Field

[0001] The present application relates to the technical field of processing automobile air-conditioning refrigeration pipe joints, and in particular to an upsetting ring device and an upsetting ring process for refrigeration pipe joints. Background Art

[0002] The refrigeration pipe joint is a connector used to connect the refrigeration pipe to other pipelines. A circular step is provided on it. The circular step plays a role in positioning and increasing the sealing area when the joint is connected to other pipelines.

[0003] The refrigeration pipe joint in the prior art is formed by stamping to form a circular step. After the stamping is completed, a straight pipe section needs to be welded on the circular step to facilitate the connection between the joint and the pipeline. However, a weld will be formed at the welding point between the circular step and the straight pipe section. After the refrigeration pipe is used for a long time, the weld will leak, resulting in reduced sealing performance of the refrigeration pipe. Summary of the invention

[0004] One purpose of the present application is to overcome the deficiencies of the prior art and to provide an upset ring device for a refrigeration pipe joint that does not require welding and has good sealing performance.

[0005] The present application provides an upsetting ring device adopting the following technical solution:

[0006] A ring upsetting device for a refrigeration pipe joint is used for performing ring upsetting processing on the pipe end of a refrigeration pipe and forming a joint. The ring upsetting device comprises an upsetting mechanism for performing upsetting processing on the pipe end of the refrigeration pipe and an upsetting mechanism for performing ring upsetting processing on the pipe end after the upsetting processing.

[0007] The upsetting mechanism comprises a first bearing seat, a first moving seat movable along the horizontal direction and the vertical direction and arranged on the side of the first bearing seat, and a first driving assembly for driving the first moving seat to move, the first moving seat is provided with a first upsetting die and a second upsetting die, the outer diameter of the first upsetting die is larger than the inner diameter of the refrigeration tube, the second upsetting die is provided with an upsetting groove at one end facing the first bearing seat, and the groove diameter of the upsetting groove is smaller than the outer diameter of the refrigeration tube;

[0008] The upsetting ring mechanism includes a second bearing seat, a second movable seat movable along the horizontal direction and the vertical direction and arranged on the side of the second bearing seat, and a second driving assembly for driving the second movable seat to move. The second movable seat is provided with a first upsetting ring die, a second upsetting ring die and a third upsetting ring die. The first upsetting ring die is provided with a first upsetting ring groove at one end facing the first bearing seat, and the groove diameter of the first upsetting ring groove is smaller than the outer diameter of the refrigeration pipe. An upsetting ring rod is provided in the first upsetting ring groove, and the outer diameter of the upsetting ring rod is larger than the inner diameter of the refrigeration pipe. The upsetting ring rod has an upsetting ring head passing through the first upsetting ring groove, and the upsetting ring head is truncated. The outer diameter of the second upsetting ring die is larger than the inner diameter of the refrigeration pipe. The third upsetting ring die is provided with a second upsetting ring groove, and the groove diameter of the second upsetting ring groove is smaller than the groove diameter of the first upsetting ring groove.

[0009] By adopting the above technical solution, the pipe end of the refrigeration pipe can be integrally formed into a joint with an upsetting ring and a straight pipe section under the cooperation of the upsetting mechanism and the upsetting ring mechanism, thereby effectively improving the sealing performance of the refrigeration pipe; at the same time, there is no need to adopt welding technology, thereby improving the processing efficiency of the refrigeration pipe joint.

[0010] Preferably, the upsetting mechanism also includes a first machine base, the first bearing seat and the first movable seat are arranged side by side on the first machine base along the horizontal direction, the first upsetting die and the second upsetting die are arranged up and down on the first movable seat, and the upper part of the first movable seat is also provided with a first positioning die for resisting the pipe end of the refrigeration pipe.

[0011] By adopting the above technical solution, the refrigeration pipe can be effectively positioned on the first bearing seat, and the first upsetting die and the second upsetting die can perform upsetting processing on the pipe ends of the refrigeration pipe in turn during the movement of the first movable seat, thereby effectively improving the processing quality and efficiency of the refrigeration pipe joint.

[0012] Preferably, the upsetting ring mechanism also includes a second machine base, the second bearing seat and the second movable seat are arranged side by side on the second machine base in a horizontal direction, the first upsetting ring die, the second upsetting ring die and the third upsetting ring die are arranged up and down on the second movable seat, and the upper part of the second movable seat is also provided with a second positioning die for resisting the pipe end of the refrigeration pipe.

[0013] By adopting the above technical solution, the refrigeration pipe can be effectively positioned on the second supporting seat, and the first upsetting ring die, the second upsetting ring die and the second upsetting ring die can perform upsetting ring processing on the pipe end of the refrigeration pipe in turn during the movement of the second movable seat, thereby effectively improving the processing quality and efficiency of the refrigeration pipe joint.

[0014] Preferably, the upsetting ring equipment also includes a preforming mechanism for preforming the tube end after the upsetting ring processing, the preforming mechanism includes a third bearing seat, a third movable seat movable along the horizontal direction and the vertical direction and arranged on the side of the third bearing seat, and a third driving assembly for driving the third movable seat to move, the third movable seat is provided with a first forming die and a second forming die, the first forming die is provided with a first forming groove toward one end of the third bearing seat, the groove diameter of the first forming groove is smaller than the outer diameter of the refrigeration pipe, the groove mouth of the first forming groove is trumpet-shaped, a forming rod is provided in the first forming groove, the outer diameter of the forming rod is larger than the inner diameter of the refrigeration pipe, the forming rod has a forming head passing through the first forming groove, the forming head is truncated cone-shaped, the second forming die is provided with a second forming groove toward one end of the third bearing seat, the groove diameter of the second forming groove is smaller than the groove diameter of the first forming groove.

[0015] By adopting the above technical solution, the end of the refrigeration pipe can be formed into a convex ring under the action of the preforming mechanism, and there is a recess between the convex ring and the pipe end, which is convenient for subsequent grooving processing at the recess, effectively improving the processing quality and efficiency of the refrigeration pipe joint.

[0016] Preferably, the preforming mechanism further comprises a third machine base, the third bearing base and the third movable base are arranged side by side in a horizontal direction on the third machine base, and the first forming mold and the second forming mold are arranged vertically on the third movable base.

[0017] By adopting the above technical solution, the first molding die and the second molding die can perform pre-molding processing on the tube ends of the refrigeration tube in sequence during the movement of the third movable seat, thereby effectively improving the processing quality and efficiency of the refrigeration tube joint.

[0018] Preferably, the upsetting ring equipment also includes a grooving mechanism for performing grooving on the tube end after pre-forming, the grooving mechanism including a fourth bearing seat, a fourth movable seat movably arranged in a direction close to or away from the fourth bearing seat, and a fourth driving assembly for driving the fourth movable seat to move, the fourth movable seat is provided with a grooving mold rotatable around its own axial centerline direction at one end facing the fourth bearing seat, an eighth driving assembly for driving the grooving mold to move, the grooving mold includes a plurality of grooving rollers arranged in a ring array and capable of relatively opening or closing, and a fifth driving assembly for driving the plurality of grooving rollers to move.

[0019] By adopting the above technical solution, a groove can be formed at the concave part of the pipe end of the refrigeration pipe under the action of the rotary groove mold, which effectively improves the processing quality and processing efficiency of the refrigeration pipe joint.

[0020] Preferably, the spiral groove mechanism also includes a fourth machine base, the fourth bearing seat and the fourth movable seat are arranged side by side on the fourth machine base along the horizontal direction, and the fourth movable seat is also provided with a first protective cover for accommodating the spiral groove mold at one end facing the fourth bearing seat, and the first protective cover is provided with a spiral groove opening for inserting the refrigeration pipe, and the multiple spiral groove rollers are arranged circumferentially around the spiral groove opening, and the fourth movable seat is also provided with a third positioning mold rotatable around the horizontal direction, and the third positioning mold can be sleeved on the pipe end of the refrigeration pipe.

[0021] By adopting the above technical solution, the refrigeration pipe can be effectively positioned on the fourth supporting seat, and the first protective cover can block the debris dropped during the rotation of the groove to prevent the debris from splashing and affecting the external environment.

[0022] Preferably, the upsetting ring equipment also includes a cutting mechanism, and there are multiple cutting mechanisms. The multiple cutting mechanisms are respectively used to flatten the tube end after the upsetting ring processing, to fix the length of the tube end after the pre-forming processing, and to chamfer the tube end after the grooving processing. Each of the cutting mechanisms includes a fifth bearing seat, a fifth movable seat that is movable in a direction close to or away from the fifth bearing seat, and a sixth driving assembly for driving the fifth movable seat to move. The fifth movable seat is provided with a cutting mold that is rotatable around its own axis direction at one end facing the fifth bearing seat, and a ninth driving assembly for driving the cutting mold to rotate. The cutting mold includes a plurality of cutters arranged in a ring array and capable of being relatively opened or closed, and a seventh driving assembly for driving the plurality of cutters to move.

[0023] By adopting the above technical solution, the pipe ends after upsetting ring processing, the pipe ends after preforming processing, and the pipe ends after grooving processing can all be cut and trimmed, which effectively improves the processing quality of the refrigeration pipe joint.

[0024] Preferably, the cutting mechanism also includes a fifth machine base, the fifth bearing seat and the fifth movable seat are arranged side by side on the fifth machine base along the horizontal direction, and the fifth movable seat is also provided with a second protective cover for accommodating the cutting mold at one end facing the fifth bearing seat, and the second protective cover is provided with a cutting opening for inserting the refrigeration pipe, and the multiple cutting knives are arranged circumferentially around the cutting opening. The fifth bearing seat is also provided with a liftable fourth positioning mold, and the fourth positioning mold can be clamped on the pipe end of the refrigeration pipe.

[0025] By adopting the above technical solution, the refrigeration pipe can be effectively positioned on the fifth supporting seat, and the second shield can shield the debris dropped during cutting to prevent the debris from splashing and affecting the external environment.

[0026] Another object of the present application is to provide a ring upsetting process for refrigeration pipe joints.

[0027] The present application provides a ring upsetting process using the following technical solutions:

[0028] A ring upsetting process for a refrigeration pipe joint, the ring upsetting process is based on the above-mentioned ring upsetting equipment, and comprises the following steps:

[0029] Step 1, upsetting: the refrigeration pipe is horizontally placed on the first bearing seat, the first movable seat moves in the vertical direction and makes the first upsetting die dock with the refrigeration pipe, then the first movable seat moves in the horizontal direction and approaches the refrigeration pipe, the first upsetting die is inserted into the pipe end of the refrigeration pipe and expands it, and the first movable seat is reset after the expansion is completed;

[0030] Then the first movable seat moves again in the vertical direction to make the second upsetting die dock with the refrigeration pipe, then the first movable seat moves in the horizontal direction and approaches the refrigeration pipe, the second upsetting die is sleeved outside the pipe end of the refrigeration pipe and performs upsetting processing on the pipe end to form an upsetting layer at the rear of the pipe end;

[0031] Step 2, upsetting ring: the upsetting refrigeration tube is horizontally placed on the second bearing seat, the second movable seat moves in the vertical direction and makes the first upsetting ring die dock with the refrigeration tube, then the second movable seat moves in the horizontal direction and approaches the refrigeration tube, the upsetting ring rod is inserted into the tube end of the refrigeration tube, the first upsetting ring die is sleeved outside the tube end of the refrigeration tube, the two cooperate with each other and process the upsetting ring on the upsetting layer, and the second movable seat is reset after the upsetting ring is completed;

[0032] Then the second movable seat moves again in the vertical direction to make the second upsetting ring die dock with the refrigeration pipe, then the second movable seat moves in the horizontal direction and approaches the refrigeration pipe, the second upsetting ring die is inserted into the pipe end of the refrigeration pipe and expands the pipe, and the second movable seat is reset after the expansion is completed;

[0033] Then the second movable seat moves again in the vertical direction to make the third upsetting ring die dock with the refrigeration pipe, then the second movable seat moves in the horizontal direction and approaches the refrigeration pipe, the third upsetting ring die is sleeved outside the pipe end of the refrigeration pipe and the upsetting ring is thickened;

[0034] Step 3, flattening: the refrigeration tube after the ring is horizontally placed on the fifth bearing seat, and then the fifth movable seat is close to the refrigeration tube, and the cutting die is inserted into the tube end of the refrigeration tube and the tube end is flattened;

[0035] Step 4, preforming: the flattened refrigeration tube is horizontally placed on the third bearing seat, the third movable seat moves in the vertical direction to make the first forming die dock with the refrigeration tube, then the third movable seat moves in the horizontal direction and approaches the refrigeration tube, the forming rod is inserted into the tube end of the refrigeration tube, the first forming die is sleeved outside the tube end of the refrigeration tube, the two cooperate with each other and process a convex ring between the tube end of the refrigeration tube and the upsetting ring, and the third movable seat is reset after the preforming is completed;

[0036] Then the third movable seat moves again in the vertical direction to make the second forming mold dock with the refrigeration pipe, then the third movable seat moves in the horizontal direction and approaches the refrigeration pipe, the second forming mold is sleeved outside the pipe end of the refrigeration pipe and the convex ring thereof is thickened;

[0037] Step 5, length determination: the preformed refrigeration tube is horizontally placed on the fifth bearing seat, and then the fifth movable seat is close to the refrigeration tube, and the cutting die is inserted into the tube end of the refrigeration tube and the tube end is processed to a fixed length;

[0038] Step 6, grooving: the fixed-length refrigeration pipe is horizontally placed on the fourth bearing seat, and then the fourth movable seat is close to the refrigeration pipe, the grooving die is inserted into the pipe end of the refrigeration pipe and the connection between the convex ring and the pipe end is grooved to form a groove;

[0039] Step 7, chamfering: the grooved refrigeration pipe is horizontally placed on the fifth bearing seat, and then the fifth movable seat is close to the refrigeration pipe, and the cutting die is inserted into the pipe end of the refrigeration pipe and the pipe end is chamfered.

[0040] By adopting the above technical scheme, the ends of the refrigeration pipes can be integrally formed into joints after going through seven steps of upsetting, upsetting ring, flattening, preforming, fixing length, grooving and chamfering. This not only effectively improves the sealing performance of the refrigeration pipes, but also eliminates the need for welding technology, thereby effectively improving the processing efficiency of the refrigeration pipe joints.

[0041] In summary, the present invention includes at least one of the following beneficial technical effects:

[0042] The pipe end of the refrigeration pipe can be integrally formed into a joint with an upsetting ring and a straight pipe section under the cooperation of the upsetting mechanism and the upsetting ring mechanism, which effectively improves the sealing performance of the refrigeration pipe; at the same time, there is no need to use welding technology, which improves the processing efficiency of the refrigeration pipe joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of the upsetting ring device in Example 1 of the present application;

[0044] Figure 2 is a schematic structural diagram of the upsetting mechanism in Example 1 of the present application;

[0045] Figure 3 yes Figure 2 Schematic diagram of longitudinal section;

[0046] Figure 4 is a structural schematic diagram of the upsetting ring mechanism in Example 1 of the present application;

[0047] Figure 5 yes Figure 4 Schematic diagram of longitudinal section;

[0048] Figure 6 is a schematic structural diagram of the preforming mechanism in Example 1 of the present application;

[0049] Figure 7 yes Figure 6 Schematic diagram of longitudinal section;

[0050] Figure 8 is a schematic structural diagram of the spiral groove mechanism in Example 1 of the present application;

[0051] Fig. 9 yes Figure 8 Schematic diagram of longitudinal section;

[0052] Fig.10 is a schematic structural diagram of the cutting mechanism in Example 1 of the present application;

[0053] Fig.11 yes Fig.10 Schematic diagram of the longitudinal section.

[0054] Markings in the accompanying drawings:

[0055] 1. Upsetting mechanism; 11. First bearing seat; 12. First moving seat; 13. First driving assembly; 14. First upsetting die; 15. Second upsetting die; 151. Upsetting groove; 16. First machine base; 17. First positioning die; 171. First positioning plate; 18. Buffer spring;

[0056] 2. Upsetting ring mechanism; 21. Second bearing seat; 22. Second moving seat; 23. Second driving assembly; 24. First upsetting ring die; 241. First upsetting ring groove; 242. Upsetting ring rod; 243. Upsetting ring head; 25. Second upsetting ring die; 26. Third upsetting ring die; 261. Second upsetting ring groove; 27. Second machine base; 28. Second positioning die; 281. Second positioning plate;

[0057] 3. Preforming mechanism; 31. Third bearing seat; 32. Third moving seat; 33. Third driving assembly; 34. First forming die; 341. First forming groove; 342. Forming rod; 343. Forming head; 35. Second forming die; 36. Second forming groove; 37. Third machine base;

[0058] 4. Grooving mechanism; 41. Fourth bearing seat; 42. Fourth moving seat; 43. Fourth driving assembly; 44. Grooving die; 441. Grooving roller; 442. Fifth driving assembly; 45. Eighth driving assembly; 46. Fourth machine base; 47. First shield; 48. Grooving opening; 49. Third positioning die; 491. Positioning opening;

[0059] 5. Cutting mechanism; 51. Fifth bearing seat; 52. Fifth moving seat; 53. Sixth driving assembly; 54. Cutting die; 541. Cutter; 542. Seventh driving assembly; 55. Ninth driving assembly; 56. Fifth machine base; 57. Second shield; 58. Cutting port; 59. Fourth positioning die; 591. Positioning groove;

[0060] 100, refrigeration pipe; 101, upsetting thick layer; 102, upsetting ring; 103, straight pipe section; 104, convex ring; 105, groove. DETAILED DESCRIPTION

[0061] The following is combined with Figure 1-11 The present invention is described in further detail.

[0062] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0063] Example 1: See Figure 1 As shown, a ring upsetting device for a refrigeration pipe joint is shown, which is used to perform ring upsetting processing on the pipe end of the refrigeration pipe 100 and form a joint. The ring upsetting device includes a thickening mechanism 1, a ring upsetting mechanism 2, a preforming mechanism 3 and a grooving mechanism 4 arranged in sequence. The thickening mechanism 1 is used to perform thickening processing on the pipe end of the refrigeration pipe 100, the ring upsetting mechanism 2 is used to perform ring upsetting processing on the pipe end after the thickening processing, the preforming mechanism 3 is used to preform the pipe end after the thickening processing, and the grooving mechanism 4 is used to groove the preformed pipe end. Cutting mechanisms 5 are respectively arranged between the ring upsetting mechanism 2 and the preforming mechanism 3, between the preforming mechanism 3 and the grooving mechanism 4, and at the rear end of the grooving mechanism 4. The three cutting mechanisms 5 are respectively used to flatten the pipe end after the ring upsetting processing, to perform fixed length processing on the pipe end after the preforming processing, and to chamfer the pipe end after the grooving processing. Among them, the specific processing parameters of flattening, length setting and chamfering can be flexibly formulated according to specific needs.

[0064] In this embodiment, combined with Figure 2-3As shown, the upsetting mechanism 1 includes a first machine base 16, a first bearing seat 11 disposed on the first machine base 16, a first moving seat 12 movable along the horizontal direction and the vertical direction and disposed on one side of the first bearing seat 11 in the horizontal direction, and a first driving assembly 13 for driving the first moving seat 12 to move. The first bearing seat 11 includes two seat bodies arranged up and down, the upper seat body can be driven and lifted by a cylinder, and the two seat bodies are respectively provided with grooves. When the two seat bodies are docked, the two grooves form a bearing groove, and the refrigeration pipe 100 can be positioned in the bearing groove; the first driving assembly 13 includes a linear motor movable along the horizontal direction, and a cylinder for driving the linear motor to move. The linear motor is arranged along the vertical direction, and the first moving seat 12 is arranged on the slider of the linear motor.

[0065] The first positioning die 17, the first upsetting die 14 and the second upsetting die 15 are arranged up and down on the first movable seat 12, and the three are respectively oriented toward the first bearing seat 11 in the horizontal direction. The front end of the first positioning die 17 is provided with a first positioning plate 171 for resisting the refrigeration pipe 100, the outer diameter of the first upsetting die 14 is larger than the inner diameter of the refrigeration pipe 100 and the front end thereof has a chamfer, and the second upsetting die 15 is provided with an upsetting groove 151 at one end facing the first bearing seat 11, and the groove diameter of the upsetting groove 151 is smaller than the outer diameter of the refrigeration pipe 100, and a buffer spring 18 is also provided between the second upsetting die 15 and the first movable seat 12.

[0066] During processing, the refrigeration pipe 100 is placed horizontally on the first supporting seat 11 and its end is against the first positioning plate 171. Then the first movable seat 12 moves and drives the first upsetting die 14 to be inserted into the pipe end of the refrigeration pipe 100 to expand the pipe end. Then the first movable seat 12 moves and drives the second upsetting die 15 to gradually insert into the pipe end of the refrigeration pipe 100. In the process of inserting into the pipe end, the second upsetting die 15 pushes part of the pipe body of the outer wall of the pipe end backward, and then forms a thickened upsetting layer 101 at the rear of the pipe end.

[0067] In this embodiment, combined with Figure 4-5As shown, the upsetting ring mechanism 2 includes a second machine base 27, a second bearing seat 21 disposed on the second machine base 27, a second movable seat 22 disposed on one side of the second bearing seat 21 in the horizontal direction and movable in the horizontal direction and the vertical direction, and a second driving assembly 23 for driving the second movable seat 22 to move. Among them, the second bearing seat 21 includes two seat bodies arranged up and down, the upper seat body can be driven and lifted by a cylinder, and the two seat bodies are respectively provided with grooves. When the two seat bodies are docked, the two grooves form a bearing groove, and the refrigeration pipe 100 can be positioned in the bearing groove; the notch of one end of the bearing groove close to the second movable seat 22 is trumpet-shaped, so that a trumpet-shaped connection portion can be formed between the processed upsetting ring 102 and the refrigeration pipe 100, which greatly increases the connection strength between the refrigeration pipe 100 and the manufactured joint; the second driving assembly 23 includes a linear motor that can move in the horizontal direction, and a cylinder for driving the linear motor to move, the linear motor is arranged in the vertical direction, and the second movable seat 22 is arranged on the slider of the linear motor.

[0068] A second positioning die 28, two first upsetting ring dies 24, a second upsetting ring die 25 and three third upsetting ring dies 26 are arranged on the second movable seat 22. A second positioning plate 281 for resisting the refrigeration pipe 100 is arranged at the front end of the second positioning die 28. A first upsetting ring groove 241 is opened at one end of the first upsetting ring die 24 facing the first bearing seat 11. The groove diameter of the first upsetting ring groove 241 is smaller than the outer diameter of the refrigeration pipe 100. An upsetting ring rod 242 is arranged in the groove 241, and the outer diameter of the upsetting ring rod 242 is larger than the inner diameter of the refrigeration tube 100. The upsetting ring rod 242 has an upsetting ring head 243 that passes through the first upsetting ring groove 241, and the upsetting ring head 243 is truncated cone-shaped. The outer diameter of the second upsetting ring die 25 is larger than the inner diameter of the refrigeration tube 100. The third upsetting ring die 26 is provided with a second upsetting ring groove 261, and the groove diameter of the second upsetting ring groove 261 is smaller than the groove diameter of the first upsetting ring groove 241.

[0069] During processing, the refrigeration tube 100 that has been upset is horizontally placed in the second bearing seat 21 and its end is against the second positioning plate 281. Then, the second moving seat 22 drives the two first upset ring dies 24 to approach the refrigeration tube 100 in sequence. The upset ring rod 242 is inserted into the tube end of the refrigeration tube 100. The first upset ring die 24 is sleeved on the outer side of the tube end of the refrigeration tube 100. The upset ring rod 242 expands the tube end of the refrigeration tube 100. The first upset ring groove 241 The expanded outer wall of the pipe end is pushed toward its rear end to form an upsetting ring 102, and a straight pipe section 103 is formed at the front end of the upsetting ring 102. Then, the second movable seat 22 drives the second upsetting ring die 25 to insert into the pipe end and expand the pipe end. Finally, the second movable seat 22 drives the three third upsetting ring dies 26 to be respectively sleeved on the outside of the pipe end. In the process of sleeved into the pipe end, the third upsetting ring die 26 pushes part of the outer wall of the pipe end backward to the upsetting ring 102 to thicken the upsetting ring 102.

[0070] In this way, the tube end of the refrigeration pipe 100 can be integrally formed into a joint with an upsetting ring 102 and a straight pipe section 103 under the cooperation of the upsetting mechanism 1 and the upsetting ring mechanism 2, which effectively improves the sealing performance of the refrigeration pipe 100; at the same time, there is no need to use welding technology, which improves the processing efficiency of the refrigeration pipe joint.

[0071] In this embodiment, combined with Figure 6-7 As shown, the preforming mechanism 3 includes a third machine base 37, a third bearing seat 31 disposed on the third machine base 37, a third movable seat 32 disposed on one side of the third bearing seat 31 in the horizontal direction and movable in the horizontal direction and the vertical direction, and a third driving assembly 33 for driving the third movable seat 32 to move. The third bearing seat 31 includes two seat bodies arranged up and down, the upper seat body can be driven and lifted by a cylinder, and the two seat bodies are respectively provided with grooves. When the two seat bodies are docked, the two grooves form a bearing groove, and the groove at one end close to the third movable seat 32 is trumpet-shaped, and the refrigeration pipe 100 can be positioned in the bearing groove; the third driving assembly 33 includes a linear motor that can move in the horizontal direction, and a cylinder for driving the linear motor to move. The linear motor is arranged in the vertical direction, and the third movable seat 32 is arranged on the slider of the linear motor.

[0072] A first molding die 34 and five second molding dies 35 are arranged on the third movable seat 32. A first molding die 34 is provided with a first molding groove 341 at one end facing the third supporting seat 31. The groove diameter of the first molding groove 341 is smaller than the outer diameter of the refrigeration tube 100. The groove mouth of the first molding groove 341 is trumpet-shaped. A molding rod 342 is arranged in the first molding groove 341. The outer diameter of the molding rod 342 is larger than the inner diameter of the refrigeration tube 100. The molding rod 342 has a molding head 343 passing through the first molding groove 341. The molding head 343 is truncated cone-shaped. A second molding die 35 is provided with a second molding groove 36 at one end facing the third supporting seat 31. The groove diameter of the second molding groove 36 is smaller than the groove diameter of the first molding groove 341.

[0073] During processing, the refrigeration tube 100 is placed horizontally on the third supporting seat 31, and then the third movable seat 32 drives the first forming mold 34 to approach the refrigeration tube 100, and the forming rod 342 is inserted into the tube end of the refrigeration tube 100. The first forming mold 34 is sleeved on the outer side of the tube end of the refrigeration tube 100, and the forming rod 342 expands the tube end of the refrigeration tube 100. The first forming groove 341 pushes the expanded outer wall of the tube end toward its rear end and forms a convex ring 104. Then, the third movable seat 32 drives five second forming molds 35 to be sleeved on the outer side of the tube end in turn. In the process of sleeved into the tube end, the second forming mold 35 pushes part of the tube body of the outer wall of the tube end backward to the convex ring 104, so that an obvious depression is formed between the convex ring 104 and the tube end, which is convenient for subsequent grooving processing at the depression, effectively improving the processing quality and efficiency of the refrigeration pipe joint.

[0074] In this embodiment, combined with Figure 8-9 As shown, the rotary groove mechanism 4 includes a fourth machine base 46, a fourth bearing seat 41 disposed on the fourth machine base 46, a fourth moving seat 42 movable along the horizontal direction and disposed on the side of the fourth bearing seat 41 in the horizontal direction, and a fourth driving assembly 43 for driving the fourth moving seat 42 to move. Among them, the fourth bearing seat 41 includes two seat bodies arranged up and down, the upper seat body can be driven and lifted by a cylinder, and the two seat bodies are respectively provided with grooves. When the two seat bodies are docked, the two grooves form a bearing groove, and the groove of the bearing groove near the end of the fourth moving seat 42 is trumpet-shaped, and the refrigeration pipe 100 can be positioned in the bearing groove; the fourth moving assembly is a linear motor arranged along the horizontal direction, and the fourth moving seat 42 is arranged on the slider of the linear motor.

[0075] The fourth movable seat 42 is provided with a groove mold 44 that can rotate around its own axis direction and an eighth driving assembly 45 for driving the groove mold 44 to move at one end thereof facing the fourth bearing seat 41. The groove mold 44 is covered with a first shield 47, and a groove opening 48 for inserting the refrigeration pipe 100 is provided on the first shield 47. The groove mold 44 includes three groove rollers 441 that are arranged in a circular array around the circumference of the groove opening 48 and can be relatively opened or closed, and a fifth driving assembly 442 for driving the three groove rollers 441 to move. Among them, the third driving assembly 33 is a motor, the fifth driving assembly 442 is a three-jaw chuck, and the three groove rollers 441 are respectively installed on the three jaws of the three-jaw chuck.

[0076] A third positioning mold 49 rotatable in a horizontal direction and a motor for driving the third positioning mold 49 to rotate are also provided on the fourth movable seat 42. A positioning port 491 is provided on one side of the end of the third positioning mold 49, which can be rotated to the side of the refrigeration pipe 100 and sleeved on the end of the refrigeration pipe 100 to position the refrigeration pipe 100. After positioning is completed, the third positioning mold 49 is rotated and away from the refrigeration pipe 100.

[0077] During processing, the refrigeration pipe 100 is placed horizontally on the fourth supporting seat 41 and its end is inserted into the positioning port 491, then the fourth movable seat 42 retreats, the third positioning mold 49 rotates and resets, the fourth movable seat 42 approaches the refrigeration pipe 100 in the horizontal direction, the grooving mold 44 is sleeved on the outside of the tube end of the refrigeration pipe 100, and then the grooving mold 44 rotates. The three grooving rollers 441 come into contact with the recessed part of the tube end of the refrigeration pipe 100 during the rotation and form a groove 105 there. The groove 105 can be used to connect with other pipelines; and the first protective cover 47 can block the debris dropped during the grooving to prevent the debris from splashing and affecting the external environment. The fourth machine base 46 has a collection box inside, and the collection box is connected to the first protective cover 47.

[0078] In this embodiment, combined with Figure 10-11As shown, the cutting mechanism 5 includes a fifth machine base 56, a fifth bearing seat 51 disposed on the fifth machine base 56, a fifth moving seat 52 movable along the horizontal direction and disposed on one side of the fifth bearing seat 51 in the horizontal direction, and a sixth driving assembly 53 for driving the fifth moving seat 52 to move. The sixth driving assembly 53 is a horizontally arranged linear motor, and the fifth moving seat 52 is arranged on a slider of the linear motor.

[0079] A cutting die 54 rotatable around its own axis direction and a ninth driving assembly 55 for driving the cutting die 54 to rotate are arranged at one end of the fifth movable seat 52 facing the fifth bearing seat 51. A second shield 57 is provided on the cutting die 54. A cutting opening 58 for inserting the refrigeration pipe 100 is provided on the second shield 57. The cutting die 54 includes three cutters 541 arranged in a circumferential annular array around the cutting opening 58 and capable of being relatively opened or closed, and a seventh driving assembly 542 for driving the three cutters 541 to move. The ninth driving assembly 55 is a motor, the seventh driving assembly 542 is a three-jaw chuck, and the three cutters 541 are respectively arranged on the three jaws of the three-jaw chuck.

[0080] A fourth positioning mold 59 that can be raised and lowered, and a cylinder for driving the fourth positioning mold 59 to be raised and lowered are also provided on the fifth supporting seat 51. A positioning groove 591 is provided at the bottom of the fourth positioning mold 59, and the positioning groove 591 can be clamped on the tube end of the refrigeration tube 100 to position the refrigeration tube 100.

[0081] During processing, the refrigeration tube 100 is horizontally placed on the fifth supporting seat 51 and its end is stuck in the positioning groove 591, then the fourth positioning mold 59 rises, the fifth movable seat 52 approaches the refrigeration tube 100 in the horizontal direction, the cutting mold 54 is sleeved on the tube end of the refrigeration tube 100, and then the cutting mold 54 rotates. The three cutters 541 cut the tube end of the refrigeration tube 100 during the rotation process to complete the cutting and trimming of the tube end; the second protective cover 57 can block the debris dropped during cutting to prevent the debris from splashing and affecting the external environment. The fifth machine base 56 has a collection box inside, and the collection box is connected to the second protective cover 57.

[0082] Embodiment 2: This embodiment discloses a ring upsetting process for a refrigeration pipe joint. The ring upsetting process is based on the ring upsetting equipment of embodiment 1, and comprises the following steps:

[0083] Step 1, upsetting: the refrigeration tube 100 is horizontally placed on the first bearing seat 11, the first movable seat 12 moves in the vertical direction and makes the first upsetting die 14 dock with the refrigeration tube 100, then the first movable seat 12 moves in the horizontal direction and approaches the refrigeration tube 100, the first upsetting die 14 is inserted into the tube end of the refrigeration tube 100 and expands it, and the first movable seat 12 is reset after the expansion is completed;

[0084] Then the first movable seat 12 moves again in the vertical direction and makes the second upsetting die 15 dock with the refrigeration pipe 100. Then the first movable seat 12 moves in the horizontal direction and approaches the refrigeration pipe 100. The second upsetting die 15 is sleeved on the outside of the pipe end of the refrigeration pipe 100 and performs upsetting processing on the pipe end to form an upsetting layer 101 at the rear of the pipe end.

[0085] like Figure 2 As shown, the refrigeration tube 100 after the upsetting process is shown.

[0086] Step 2, upsetting ring: the upsetting refrigeration tube 100 is horizontally placed on the second bearing seat 21, the second movable seat 22 moves along the vertical direction and makes the first upsetting ring die 24 and the refrigeration tube 100 docked in the right position, then the second movable seat 22 moves along the horizontal direction and approaches the refrigeration tube 100, the upsetting ring rod 242 is inserted into the tube end of the refrigeration tube 100, and the first upsetting ring die 24 is sleeved on the tube end of the refrigeration tube 100, the two cooperate with each other and process the upsetting ring 102 on the upsetting layer 101, and the second movable seat 22 is reset after the upsetting ring is completed;

[0087] Then the second movable seat 22 moves again in the vertical direction to make the second upsetting ring die 25 dock with the refrigeration pipe 100, then the second movable seat 22 moves in the horizontal direction and approaches the refrigeration pipe 100, the second upsetting ring die 25 is inserted into the pipe end of the refrigeration pipe 100 and expands it, and the second movable seat 22 is reset after the expansion is completed;

[0088] Then the second movable seat 22 moves again in the vertical direction to make the third upsetting ring die 26 dock with the refrigeration pipe 100, and then the second movable seat 22 moves in the horizontal direction and approaches the refrigeration pipe 100, and the third upsetting ring die 26 is sleeved outside the pipe end of the refrigeration pipe 100 and thickens the upsetting ring 102.

[0089] like Figure 4 As shown, the refrigeration tube 100 after the upset ring processing is shown.

[0090] Step 3, flattening: the refrigeration tube 100 after the ring is upset is horizontally placed on the fifth bearing seat 51, and then the fifth movable seat 52 is close to the refrigeration tube 100, and the cutting die 54 is inserted into the tube end of the refrigeration tube 100 to flatten the tube end.

[0091] Step 4, preforming: the flattened refrigeration tube 100 is horizontally placed on the third bearing seat 31, the third movable seat 32 moves in the vertical direction to make the first forming die 34 and the refrigeration tube 100 docked in the right position, then the third movable seat 32 moves in the horizontal direction and approaches the refrigeration tube 100, the forming rod 342 is inserted into the tube end of the refrigeration tube 100, and the first forming die 34 is sleeved outside the tube end of the refrigeration tube 100, the two cooperate with each other and process the convex ring 104 between the tube end of the refrigeration tube 100 and the upset ring 102, and the third movable seat 32 is reset after the preforming is completed;

[0092] Then the third movable seat 32 moves again in the vertical direction to make the second molding die 35 dock with the refrigeration pipe 100, and then the third movable seat 32 moves in the horizontal direction and approaches the refrigeration pipe 100, and the second molding die 35 is sleeved on the outside of the pipe end of the refrigeration pipe 100 and its convex ring 104 is thickened.

[0093] like Figure 6 As shown, the refrigeration tube 100 after preforming is shown.

[0094] Step 5, length determination: the preformed refrigeration tube 100 is horizontally placed on the fifth supporting seat 51, and then the fifth movable seat 52 is close to the refrigeration tube 100, and the cutting die 54 is inserted into the tube end of the refrigeration tube 100 to perform length determination processing on the tube end.

[0095] Step 6, grooving: the fixed-length refrigeration tube 100 is horizontally placed on the fourth supporting seat 41, and then the fourth movable seat 42 is close to the refrigeration tube 100, the grooving mold 44 is inserted into the tube end of the refrigeration tube 100 and the connection between the convex ring 104 and the tube end is grooved to form a groove 105.

[0096] like Figure 8 As shown, the refrigeration tube 100 after the groove processing is shown.

[0097] Step 7, chamfering: the grooved refrigeration pipe 100 is horizontally placed on the fifth bearing seat 51, and then the fifth movable seat 52 is close to the refrigeration pipe 100, and the cutting die 54 is inserted into the pipe end of the refrigeration pipe 100 to perform chamfering on the pipe end. The specific processing parameters of flattening, length setting and chamfering can be flexibly formulated according to specific needs.

[0098] In this way, the tube end of the refrigeration pipe 100 can be integrally formed into a joint after going through the seven steps of upsetting, upsetting ring, flattening, preforming, fixing length, grooving and chamfering in sequence. This not only effectively improves the sealing performance of the refrigeration pipe 100, but also eliminates the need for welding technology, effectively improving the processing efficiency of the refrigeration pipe joint.

[0099] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring-forming device for a refrigeration pipe joint, used for performing a ring-forming process on the pipe end of a refrigeration pipe (100) and forming a joint, characterized in that: The upsetting ring equipment comprises an upsetting mechanism (1) for performing upsetting processing on the tube end of a refrigeration tube (100), an upsetting ring mechanism (2) for performing upsetting ring processing on the tube end after the upsetting processing, a preforming mechanism (3) for preforming the tube end after the upsetting ring processing, a grooving mechanism (4) for performing grooving processing on the tube end after the preforming processing, and a cutting mechanism (5), wherein there are a plurality of cutting mechanisms (5), and the plurality of cutting mechanisms (5) are respectively used to perform flattening processing on the tube end after the upsetting ring processing, perform fixed length processing on the tube end after the preforming processing, and perform chamfering processing on the tube end after the grooving processing; The upsetting mechanism (1) comprises a first bearing seat (11), a first movable seat (12) movable along the horizontal direction and the vertical direction and arranged on the side of the first bearing seat (11), and a first driving assembly (13) for driving the first movable seat (12) to move, the first movable seat (12) being provided with a first upsetting die (14) and a second upsetting die (15), the outer diameter of the first upsetting die (14) being larger than the inner diameter of the refrigeration tube (100), the second upsetting die (15) being provided with an upsetting groove (151) at one end facing the first bearing seat (11), the groove diameter of the upsetting groove (151) being smaller than the outer diameter of the refrigeration tube (100); The upsetting ring mechanism (2) comprises a second bearing seat (21), a second movable seat (22) movable along the horizontal direction and the vertical direction and arranged on the side of the second bearing seat (21), and a second driving assembly (23) for driving the second movable seat (22) to move, the second movable seat (22) is provided with a first upsetting ring die (24), a second upsetting ring die (25) and a third upsetting ring die (26), the first upsetting ring die (24) is provided with a first upsetting ring groove (241) at one end facing the first bearing seat (11), the groove diameter of the first upsetting ring groove (241) being smaller than the diameter of the refrigeration pipe (11). 00), an upsetting ring rod (242) is arranged in the first upsetting ring groove (241), the outer diameter of the upsetting ring rod (242) is larger than the inner diameter of the refrigeration pipe (100), the upsetting ring rod (242) has an upsetting ring head (243) passing through the first upsetting ring groove (241), the upsetting ring head (243) is in a truncated cone shape, the outer diameter of the second upsetting ring die (25) is larger than the inner diameter of the refrigeration pipe (100), and the third upsetting ring die (26) is provided with a second upsetting ring groove (261), the groove diameter of the second upsetting ring groove (261) is smaller than the groove diameter of the first upsetting ring groove (241).

2. The upset ring device for refrigeration pipe joints according to claim 1, characterized in that: The upsetting mechanism (1) further comprises a first machine base (16), the first bearing base (11) and the first movable base (12) being arranged side by side on the first machine base (16) along a horizontal direction, the first upsetting die (14) and the second upsetting die (15) being arranged vertically on the first movable base (12), and a first positioning die (17) for resisting against the pipe end of the refrigeration pipe (100) is further arranged on the upper part of the first movable base (12).

3. The upset ring device for refrigeration pipe joints according to claim 1, characterized in that: The upsetting ring mechanism (2) also includes a second machine base (27), the second bearing base (21) and the second movable base (22) are arranged side by side on the second machine base (27) along the horizontal direction, the first upsetting ring die (24), the second upsetting ring die (25) and the third upsetting ring die (26) are arranged up and down on the second movable base (22), and the upper part of the second movable base (22) is also provided with a second positioning die (28) for resisting the pipe end of the refrigeration pipe (100).

4. The upsetting ring device for refrigeration pipe joints according to any one of claims 1 to 3, characterized in that: The preforming mechanism (3) comprises a third bearing seat (31), a third movable seat (32) movable along the horizontal direction and the vertical direction and arranged on the side of the third bearing seat (31), and a third driving assembly (33) for driving the third movable seat (32) to move, and the third movable seat (32) is provided with a first forming mold (34) and a second forming mold (35), and the first forming mold (34) is provided with a first forming groove (341) at one end facing the third bearing seat (31), and the groove diameter of the first forming groove (341) is smaller than the outer diameter of the refrigeration pipe (100). The notch of the first molding groove (341) is trumpet-shaped, a molding rod (342) is arranged in the first molding groove (341), the outer diameter of the molding rod (342) is larger than the inner diameter of the refrigeration tube (100), the molding rod (342) has a molding head (343) that passes through the first molding groove (341), the molding head (343) is truncated, and the second molding die (35) is provided with a second molding groove (36) at one end facing the third bearing seat (31), the groove diameter of the second molding groove (36) is smaller than the groove diameter of the first molding groove (341).

5. The upset ring device for refrigeration pipe joints according to claim 4, characterized in that: The preforming mechanism (3) also includes a third machine base (37), the third bearing base (31) and the third movable base (32) are arranged side by side on the third machine base (37) along the horizontal direction, and the first forming mold (34) and the second forming mold (35) are arranged up and down on the third movable base (32).

6. The upset ring device for refrigeration pipe joints according to claim 4, characterized in that: The groove mechanism (4) comprises a fourth bearing seat (41), a fourth movable seat (42) which is movable in a direction close to or away from the fourth bearing seat (41), and a fourth driving component (43) for driving the fourth movable seat (42) to move; a groove mold (44) which is rotatable around its own axis is arranged at one end of the fourth movable seat (42) facing the fourth bearing seat (41); an eighth driving component (45) for driving the groove mold (44) to move; the groove mold (44) comprises a plurality of groove rollers (441) which are arranged in a ring array and can be relatively opened or closed; and a fifth driving component (442) for driving the plurality of groove rollers (441) to move.

7. The upset ring device for refrigeration pipe joints according to claim 6, characterized in that: The groove mechanism (4) also includes a fourth machine base (46), the fourth bearing seat (41) and the fourth movable seat (42) are arranged side by side on the fourth machine base (46) along the horizontal direction, and the fourth movable seat (42) is also provided with a first protective cover (47) for accommodating the groove mold (44) at one end facing the fourth bearing seat (41), and the first protective cover (47) is provided with a groove opening (48) for inserting the refrigeration pipe (100), and the multiple groove rollers (441) are arranged circumferentially around the groove opening (48), and the fourth movable seat (42) is also provided with a third positioning mold (49) rotatable around the horizontal direction, and the third positioning mold (49) can be sleeved on the pipe end of the refrigeration pipe (100).

8. The upset ring device for refrigeration pipe joints according to claim 6, characterized in that: Each of the cutting mechanisms (5) comprises a fifth bearing seat (51), a fifth movable seat (52) movable in a direction approaching or away from the fifth bearing seat (51), and a sixth driving assembly (53) for driving the fifth movable seat (52) to move; the fifth movable seat (52) is provided with a cutting die (54) rotatable around its own axis at one end facing the fifth bearing seat (51); a ninth driving assembly (55) for driving the cutting die (54) to rotate; the cutting die (54) comprises a plurality of cutting knives (541) arranged in a ring array and capable of being relatively opened or closed; and a seventh driving assembly (542) for driving the plurality of cutting knives (541) to move.

9. The upset ring device for refrigeration pipe joints according to claim 8, characterized in that: The cutting mechanism (5) also includes a fifth machine base (56), the fifth bearing seat (51) and the fifth movable seat (52) are arranged side by side on the fifth machine base (56) along the horizontal direction, and the fifth movable seat (52) is also provided with a second protective cover (57) for accommodating the cutting mold (54) at one end facing the fifth bearing seat (51), and the second protective cover (57) is provided with a cutting opening (58) for inserting the refrigeration pipe (100), and the multiple cutting knives (541) are arranged circumferentially around the cutting opening (58), and the fifth bearing seat (51) is also provided with a fourth positioning mold (59) that can be raised and lowered, and the fourth positioning mold (59) can be clamped on the pipe end of the refrigeration pipe (100).

10. A ring upsetting process for a refrigeration pipe joint, characterized in that: The upsetting ring process is based on the upsetting ring equipment according to claim 8 or 9, which comprises the following steps: Step 1, upsetting: the refrigeration tube (100) is horizontally placed on the first bearing seat (11), the first movable seat (12) is moved in the vertical direction and the first upsetting die (14) is docked with the refrigeration tube (100), then the first movable seat (12) is moved in the horizontal direction and approaches the refrigeration tube (100), the first upsetting die (14) is inserted into the tube end of the refrigeration tube (100) and expands the tube, and the first movable seat (12) is reset after the expansion is completed; Then the first movable seat (12) moves again in the vertical direction and makes the second upsetting die (15) dock with the refrigeration pipe (100) in a positive position, then the first movable seat (12) moves in the horizontal direction and approaches the refrigeration pipe (100), the second upsetting die (15) is sleeved outside the pipe end of the refrigeration pipe (100) and performs upsetting processing on the pipe end to form an upsetting layer (101) at the rear of the pipe end; Step 2, upsetting ring: the upset refrigeration tube (100) is horizontally placed on the second bearing seat (21), the second movable seat (22) moves in the vertical direction and makes the first upsetting ring die (24) dock with the refrigeration tube (100), then the second movable seat (22) moves in the horizontal direction and approaches the refrigeration tube (100), the upsetting ring rod (242) is inserted into the tube end of the refrigeration tube (100), and the first upsetting ring die (24) is sleeved on the outside of the tube end of the refrigeration tube (100), the two cooperate with each other and process the upsetting ring (102) on the upsetting layer (101), and the second movable seat (22) is reset after the upsetting ring is completed; Then, the second movable seat (22) moves again in the vertical direction and makes the second upsetting ring die (25) dock with the refrigeration pipe (100) in a positive position, then the second movable seat (22) moves in the horizontal direction and approaches the refrigeration pipe (100), the second upsetting ring die (25) is inserted into the pipe end of the refrigeration pipe (100) and expands the pipe end, and the second movable seat (22) is reset after the expansion is completed; Then, the second movable seat (22) moves again in the vertical direction and makes the third upsetting ring die (26) dock with the refrigeration pipe (100), and then the second movable seat (22) moves in the horizontal direction and approaches the refrigeration pipe (100), and the third upsetting ring die (26) is sleeved outside the pipe end of the refrigeration pipe (100) and thickens the upsetting ring (102); Step 3, flattening: the refrigeration tube (100) after the ring is upset is horizontally placed on the fifth bearing seat (51), and then the fifth movable seat (52) is close to the refrigeration tube (100), and the cutting die (54) is inserted into the tube end of the refrigeration tube (100) and the tube end is flattened; Step 4, preforming: the flattened refrigeration tube (100) is horizontally placed on the third bearing seat (31), the third movable seat (32) moves in the vertical direction to make the first forming mold (34) and the refrigeration tube (100) docked in the right position, then the third movable seat (32) moves in the horizontal direction and approaches the refrigeration tube (100), the forming rod (342) is inserted into the tube end of the refrigeration tube (100), and the first forming mold (34) is sleeved on the outside of the tube end of the refrigeration tube (100), the two cooperate with each other and process a convex ring (104) between the tube end of the refrigeration tube (100) and the upset ring (102), and the third movable seat (32) is reset after the preforming is completed; Then, the third movable seat (32) moves again in the vertical direction and makes the second molding die (35) dock with the refrigeration pipe (100) in a positive position. Then, the third movable seat (32) moves in the horizontal direction and approaches the refrigeration pipe (100). The second molding die (35) is sleeved outside the pipe end of the refrigeration pipe (100) and the convex ring (104) thereof is thickened. Step 5, length determination: the preformed refrigeration tube (100) is horizontally placed on the fifth bearing seat (51), and then the fifth movable seat (52) is close to the refrigeration tube (100), and the cutting die (54) is inserted into the tube end of the refrigeration tube (100) and the tube end is processed to a fixed length; Step 6, grooving: the fixed-length refrigeration tube (100) is horizontally placed on the fourth supporting seat (41), and then the fourth movable seat (42) is close to the refrigeration tube (100), and the grooving die (44) is inserted into the tube end of the refrigeration tube (100) and the connection between the convex ring (104) and the tube end is grooved to form a groove (105); Step 7, chamfering: the grooved refrigeration tube (100) is horizontally placed on the fifth supporting seat (51), and then the fifth movable seat (52) is close to the refrigeration tube (100), and the cutting die (54) is inserted into the tube end of the refrigeration tube (100) and the tube end is chamfered.

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