Diameter-expanding cold-drawing device for stainless steel pipe

Abstract

The utility model relates to the technical field of stainless steel pipe production and processing, in particular to a stainless steel pipe expanding and cold drawing device which comprises a processing table, the top of the processing table is slidably connected with a mold through a guide groove, a supporting part for supporting a stainless steel pipe is arranged in the mold, and an adjusting assembly is arranged on the side face of the mold. The adjusting assembly is used for adjusting the height of the supporting part; wherein a driving part is fixedly installed at the top of the machining table, the driving part is located in the die and provided with an expanding head used for expanding the stainless steel pipe, on one hand, the distance between the upper die and the lower die can be adjusted through the action of a pair of bevel gears, and in this way, a pair of supporting parts can be driven to move up and down in the adjusting process; and on the other hand, through the effect of the adjusting assembly, the height of the supporting base can be adjusted, the mold can be driven to move, and feeding and discharging are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe production and processing technology, and in particular to a stainless steel pipe diameter expansion and cold drawing device. Background Technology

[0002] Cold drawing of stainless steel pipe is a metal processing technology that involves the manufacturing process of stainless steel seamless pipe. Cold drawing is a process of processing metal materials without heating. The material is stretched by a cold drawing machine to change its size and shape. This processing method can improve the toughness and tensile strength of the material, thereby obtaining better mechanical properties.

[0003] To facilitate the enlargement of the inner diameter of stainless steel pipes, a cold drawing device for expanding the diameter of stainless steel pipes is needed for the processing operation. For example, Chinese Patent Publication No. CN217528741U discloses a cold drawing die for pipe production, including an inner die, an outer die, and a pipe body. The inner die is located inside the outer die, and the pipe body is fitted onto the surface of the inner die. A fixing device body is provided on the left side of the outer die, and a fixing rod is threadedly connected to the right side of the fixing device body. The right side of the fixing rod extends from the pipe body to the right side of the inner die. Limiting mechanisms are fixedly connected to both sides of the right side of the fixing device body. This invention, by setting limiting mechanisms, can limit the fixing rod, preventing the inner die from falling off during operation. It facilitates the limiting of the inner die and the processing of the pipe body. This solves the problem that the limiting effect of this type of cold drawing die is poor, and that when the inner die is subjected to large tensile forces from the pipe, it can cause the inner die to move with the pipe, leading to the inner die falling off and reducing processing efficiency.

[0004] Some stainless steel pipe expansion cold drawing devices use an outer mold to fix the stainless steel pipe and then use an inner mold to expand the inner diameter of the stainless steel pipe. However, in actual operation, considering that the outer mold of such devices cannot be replaced or the internal space can not be adjusted, it is not possible to clamp and fix stainless steel pipes of different diameters within a certain range, which reduces the applicability and practicality of the cold drawing device. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies that cannot clamp and fix stainless steel pipes of different diameters within a certain range, and to propose a stainless steel pipe diameter expansion and cold drawing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a stainless steel tube expansion and cold drawing device, including a processing table, the top of which is slidably connected to a mold via a guide groove, the mold is provided with a support part for supporting the stainless steel tube, and an adjustment component is provided on its side, the adjustment component is used to adjust the height of the support part.

[0008] The top of the processing table is fixedly installed with a driving component, and the driving component is located inside the mold and has an expanding head for expanding the diameter of stainless steel pipes.

[0009] Furthermore, the mold includes an upper mold and a lower mold, and a receiving cavity is formed between the opposing sides of the upper mold and the lower mold. The sides of the pair of receiving cavities extend to form a bending portion for locking the stainless steel tube. The support portion includes a pair of support seats, and the support seats are longitudinally slidably connected in the pair of receiving cavities. An arc-shaped groove is formed between the opposing sides of the pair of support seats.

[0010] Furthermore, the lower mold has several guide rods at the corners of its top and an installation cavity on one side. One of the guide rods extends into the installation cavity and is fixedly mounted with a driven bevel gear, and has a threaded top. The side of the lower mold is rotatably connected to a handwheel via a rotating shaft. One end of the rotating shaft is fixedly mounted with a driving bevel gear, which meshes with the driven bevel gear and rotates.

[0011] Furthermore, one of the guide rods is threadedly connected to the upper die via the threaded line, while the other guide rod is slidably connected to the upper die.

[0012] Furthermore, the adjustment assembly includes through slots on the sides of the upper and lower molds, and inclined slots on the sides of a pair of support seats located within the through slots. The pair of inclined slots form a figure-eight structure. A cylinder is fixedly installed on the top of the processing table, and a connector is fixedly connected to the shaft end of the cylinder. A pair of limiting posts are provided on the side of the connector through a slot, and the pair of limiting posts are slidably connected within the inclined slots.

[0013] Furthermore, the driving component includes a hydraulic cylinder fixedly mounted on the top of the processing table, the shaft end of the hydraulic cylinder being slidably connected to the receiving cavity and detachably connected to an expanding head.

[0014] The present invention provides a stainless steel tube expansion and cold drawing device with the following advantages: Firstly, the device uses a pair of bevel gears to adjust the distance between the upper and lower dies, which in turn drives a pair of support parts to move up and down during the adjustment process, allowing stainless steel tubes of different diameters within a certain range to be placed in the cavity. Secondly, the device uses an adjustment component to not only adjust the height of the support base but also drive the mold to move, facilitating loading and unloading. The device has a simple structure, is easy to operate, and is highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the driving component of this utility model;

[0017] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0018] Figure 4 This is a cross-sectional view of the mold of this utility model;

[0019] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of region B;

[0020] Figure 6 This is a cross-sectional view of the limiting post of this utility model.

[0021] In the diagram: 1. Machining table; 2. Guide groove; 3. Mold; 31. Upper mold; 32. Lower mold; 33. Receiving cavity; 34. Bending part; 35. Guide rod; 351. Threaded wire; 36. Mounting cavity; 37. Driven bevel gear; 38. Handwheel; 39. Driving bevel gear; 4. Support part; 41. Support base; 5. Adjustment component; 51. Inclined groove; 52. Cylinder; 53. Connecting part; 54. Limiting post; 55. Through groove; 6. Driving component; 61. Hydraulic cylinder; 7. Expanding head. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6 A stainless steel tube expansion and cold drawing device includes a processing table 1. The top of the processing table 1 is slidably connected to a mold 3 via a guide groove 2. The mold 3 is provided with a support part 4 for supporting the stainless steel tube and an adjustment component 5 on its side. The adjustment component 5 is used to adjust the height of the support part 4.

[0024] The top of the processing table 1 is fixedly installed with a driving component 6, and the driving component 6 is located inside the mold 3 and has an expanding head 7 for expanding the diameter of stainless steel pipes.

[0025] Furthermore, the mold 3 includes an upper mold 31 and a lower mold 32. A receiving cavity 33 is provided between the opposing sides of the upper mold 31 and the lower mold 32. A pair of receiving cavities 33 extend to form a bending portion 34 for locking the stainless steel tube. The support portion 4 includes a pair of support seats 41. The support seats 41 are longitudinally slidably connected in the pair of receiving cavities 33. An arc-shaped groove is provided between the opposing sides of the pair of support seats 41.

[0026] Furthermore, the lower mold 32 has several guide rods 35 at the corners of its top and an installation cavity 36 on one side. The bottom of one of the guide rods 35 extends into the installation cavity 36 and is fixedly installed with a driven bevel gear 37, and its top is provided with a thread 351. A handwheel 38 is rotatably connected to the side of the lower mold 32 via a rotating shaft. One end of the rotating shaft is fixedly installed with a driving bevel gear 39, which meshes with the driven bevel gear 37 and rotates.

[0027] More specifically, one of the guide rods 35 is threadedly connected to the upper mold 31 via the threaded line 351, and the other guide rod 35 is slidably connected to the upper mold 31.

[0028] It is worth mentioning that by rotating the handwheel 38, the driving bevel gear 39 is driven to rotate in conjunction with the driven bevel gear 37, which in turn drives the guide rod 35 to rotate. Under the action of the threaded line 351 and the guide rod 35, the upper mold 31 drives the support base 41 to adjust its height.

[0029] The upper mold 31 and the lower mold 32 drive the pair of support seats 41 to adjust their height, thereby changing the space of the receiving cavity 33 and thus being able to adapt to stainless steel pipes of different diameters within a certain range.

[0030] In practice, when expanding the diameter of a stainless steel pipe by cold drawing, it is necessary to align the inner diameter of the stainless steel pipe with the expanding head 7 to prevent the pipe from getting stuck on the expanding head 7. Therefore, it is necessary to adjust the height of the pair of support seats 41 to ensure that the expanding head 7 does not get stuck on the stainless steel pipe.

[0031] In general, the adjustment component 5 includes through slots 55 on the sides of the upper mold 31 and the lower mold 32, and inclined slots 51 on the sides of a pair of support seats 41 located in the through slots 55. The pair of inclined slots 51 form a figure-eight structure. A cylinder 52 is fixedly installed on the top of the processing table 1. A connector 53 is fixedly connected to the shaft end of the cylinder 52. A pair of limiting posts 54 are provided on the side of the connector 53 through a slot. The pair of limiting posts 54 are slidably connected in the inclined slots 51.

[0032] It is worth mentioning that the limiting post 54 is an elastic protrusion, and the diameter of the slot is smaller than the diameter of the limiting post 54. This makes it easy to change the position of the limiting post 54. The advantage of the adjustable position of the limiting post 54 is that it can be changed according to the position of the upper mold 31 to prevent jamming.

[0033] Finally, the driving component 6 includes a hydraulic cylinder 61 fixedly mounted on the top of the processing table 1. The shaft end of the hydraulic cylinder 61 is slidably connected to the receiving cavity 33 and is detachably connected to an expanding head 7.

[0034] Specifically, the upper mold 31 and the lower mold 32 are connected together by the guide rod 35. Therefore, the stainless steel tube is placed on the top of the support base 41 and the shaft end of the hydraulic cylinder 61 is located inside the inner diameter of the stainless steel tube. The cylinder 52 abuts against a pair of support bases 41 through the connecting piece 53 and the limiting post 54.

[0035] In this process, the pair of support seats 41 are driven by the resistance of the limiting post 54 to move the upper mold 31 and the lower mold 32 toward the hydraulic cylinder 61. Under the action of the pair of inclined grooves 51, the pair of support seats 41 move relative to each other to fix the stainless steel tube. Then, the expansion head 7 is fixedly connected to the other end of the shaft of the hydraulic cylinder 61 to expand the diameter of the stainless steel tube.

[0036] Working method: During operation, the drive bevel gear 39 is rotated by the handwheel 38 and then driven by the driven bevel gear 37 to drive the guide rod 35 to rotate. Under the action of the thread 351 and the guide rod 35, the upper mold 31 drives the support base 41 to adjust its height, and the stainless steel tube is placed on the top of the support base 41, and the shaft end of the hydraulic cylinder 61 is located inside the inner diameter of the stainless steel tube.

[0037] Then, the cylinder 52, through the connector 53 and the limiting post 54, abuts against a pair of support seats 41. The support seats 41, driven by the abutment of the limiting post 54, move the upper mold 31 and the lower mold 32 toward the hydraulic cylinder 61. Under the action of a pair of inclined grooves 51, the pair of support seats 41 move relative to each other to fix the stainless steel tube.

[0038] Finally, by fixing an expansion head 7 to the other end of the hydraulic cylinder 61 shaft, the stainless steel pipe can be expanded.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stainless steel pipe expansion and cold drawing device, comprising a processing table (1), characterized in that: The top of the processing table (1) is slidably connected to a mold (3) via a guide groove (2); a support portion (4) for supporting the stainless steel pipe is provided inside the mold (3); and an adjustment component (5) is provided on the side thereof; the adjustment component (5) is used to adjust the height of the support portion (4); A driving component (6) is fixedly mounted on the top of the processing table (1), and the driving component (6) is located inside the mold (3) and is provided with an expanding head (7) for expanding the diameter of the stainless steel pipe.

2. A stainless steel pipe diameter expansion cold drawing device according to claim 1, characterized in that: The mold (3) comprises an upper mold (31) and a lower mold (32), a receiving cavity (33) is provided between the opposing sides of the upper mold (31) and the lower mold (32), a pair of side surfaces of the receiving cavity (33) are extended to form a bending portion (34) for clamping the stainless steel pipe, and the support portion (4) comprises a pair of support seats (41), the support seats (41) are longitudinally slidably connected in the pair of receiving cavities (33), and an arc groove is provided between the opposing sides of the pair of support seats (41).

3. A stainless steel pipe expansion and cold drawing device according to claim 2, characterized in that: The top of the lower die (32) is provided with a plurality of guide rods (35) at the corners, and a mounting cavity (36) is provided inside one side, the bottom of one of the guide rods (35) extends into the mounting cavity (36) and a driven bevel gear (37) is fixedly installed therein, and a thread line (351) is provided on the top of the guide rods (35), a hand wheel (38) is rotatably connected to the side of the lower die (32) via a rotating shaft, a driving bevel gear (39) is fixedly installed at one end of the rotating shaft, and the driving bevel gear (39) is meshed and rotated with the driven bevel gear (37).

4. A stainless steel pipe expansion and cold drawing device according to claim 3, characterized in that: One of the guide rods (35) is threadedly connected to the upper mold (31) via the thread line (351), and the other guide rod (35) is slidably connected to the upper mold (31).

5. The stainless steel pipe expansion and cold drawing device according to claim 2, characterized in that: The adjustment assembly (5) comprises through grooves (55) provided on the sides of the upper die (31) and the lower die (32); a pair of inclined grooves (51) are provided on the sides of the support seat (41) and are located in the through grooves (55); an eight-shaped structure is formed between the pair of inclined grooves (51); a cylinder (52) is fixedly mounted on the top of the processing table (1); a connecting piece (53) is fixedly connected to the axial end of the cylinder (52); a pair of limiting columns (54) are provided on the side of the connecting piece (53) through a slot; and the pair of limiting columns (54) are slidably connected in the inclined grooves (51).

6. The stainless steel pipe expansion and cold drawing device according to claim 2, characterized in that: The driving member (6) comprises a hydraulic cylinder (61) fixedly mounted on the top of the processing table (1); the shaft end of the hydraulic cylinder (61) is slidably connected to the accommodating cavity (33) and is detachably connected to an expansion head (7).

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