Mechanical expanding welding seam deviation rectifying device
By using a mechanical diameter-expanding weld seam correction device, the problem of weld seams running out of the void groove during the diameter expansion process was solved, thereby improving the stability and strength of the weld seam and increasing the diameter expansion efficiency.
Patent Information
- Application Number
- CN202423199103.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-24
AI Technical Summary
During the expansion process of straight seam welded pipes, the weld seam is prone to run out of the clearance groove of the expansion mold, which leads to product quality problems and affects the expansion efficiency.
A mechanical expansion weld seam correction device is adopted. Through the specification adjustment mechanism, radial adjustment mechanism and swing mechanism, the weld seam is always kept in the clearance groove of the expansion mold. The steel pipe is fixed by the biting mechanism and driven to rotate, ensuring that the weld seam is not subjected to unnecessary pressure.
It effectively ensures weld quality, improves weld strength, avoids adverse stresses in the weld during the diameter expansion process, and improves diameter expansion efficiency.
Smart Images
Figure CN223670010U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of straight seam welded pipe expanding, in particular to a mechanical expanding weld rectification device. BACKGROUND
[0002] In the production of straight seam welded pipe, there is a key process-mechanical expanding. The purpose of this process is to eliminate the welding stress of the weld and to finish the geometry of the steel pipe. By expanding the die outward, the steel pipe material is subjected to a circumferential tensile force, which is used to offset the compressive stress generated during the cooling process of the weld, thereby improving the strength and safety factor of the weld.
[0003] Since the weld of the straight seam welded pipe is higher than the base material surface of the steel pipe, if the expanding die directly expands against the weld, the weld will bear a bending force, which is easy to produce an unfavorable internal stress in the weld. Therefore, the industry usually designs an avoidance groove on the expanding die corresponding to the weld to avoid direct pressure on the weld. However, the weld of the straight seam welded pipe is not a perfect straight line, but a curve due to factors such as raw materials and production process treatment, and the smaller the steel pipe and the thinner the wall thickness, the greater the curvature of the curve. In the expanding process, it is easy for the weld to run out of the avoidance groove. If the monitoring is timely, the steel pipe can be taken out of the expanding die, the weld of the steel pipe is rotated in place, and then the steel pipe is put into the expanding die for continuous processing, but the efficiency of the steel pipe expanding is affected. If the monitoring is not in place, the weld is always outside the avoidance groove during the expanding process, which is easy to cause problems in product quality. Therefore, the present application provides a new technical solution. CONTENT OF THE UTILITY MODEL
[0004] In order to improve the strength of the weld of the straight seam welded pipe, the present application provides a mechanical expanding weld rectification device.
[0005] A mechanical expanding weld rectification device, comprising a specification adjustment mechanism installed on a pipe clamping trolley of a mechanical expanding unit and connected with the pipe clamping trolley; a radial adjustment mechanism installed on the specification adjustment mechanism and capable of swinging relative to the specification adjustment mechanism; a swinging mechanism installed between the specification adjustment mechanism and the radial adjustment mechanism and used for controlling the swinging amplitude of the radial adjustment mechanism; and a clamping mechanism used for clamping the steel pipe.
[0006] Optionally, the specification adjustment mechanism comprises a first connecting seat, a first pressing plate, an ear seat, a first hinge shaft, a lifting lug, and a rotating shaft. The first connecting seat is constrained on the pipe clamping trolley of the mechanical expanding unit through the first pressing plate. A screw lifter installed on the pipe clamping trolley is connected with the first connecting seat through the ear seat, the first hinge shaft, and the lifting lug, so that the center of the rotating shaft coincides with the center of the steel pipe to be expanded. The rotating shaft is used for connecting with the radial adjustment mechanism.
[0007] Optionally, the radial adjustment mechanism comprises a swing arm, a sliding table, a first lead screw, a first lead screw nut, a nut seat, a shear pin, an upper bearing seat, a second connecting seat, a first speed reducer, a first driving motor, a first coupling, a lower bearing seat, and an insert strip. The swing arm is connected to the gauge adjustment mechanism through a rotating shaft. The sliding table is constrained on the guide rail of the swing arm through the insert strip. The first lead screw is installed on the swing arm through the upper bearing seat and the lower bearing seat, and drives the sliding table to move along the guide rail direction through the first lead screw nut, the nut seat, and the shear pin. The second connecting seat is installed on the swing arm and coaxial with the upper bearing seat. The first driving motor drives the first lead screw to rotate through the first speed reducer and the first coupling, thereby driving the sliding table to move linearly. The first speed reducer is installed on the second connecting seat.
[0008] Optionally, the swing mechanism comprises an adjustment sliding table, a second lead screw, a second lead screw nut, a driving slider, a main bearing seat, a secondary bearing seat, a third connecting seat, a second coupling, a second speed reducer, a second driving motor, a slider, a guide plate, and a guide pressing plate. The adjustment sliding table is fixed on the swing arm. The second lead screw is installed on the adjustment sliding table through the main bearing seat and the secondary bearing seat, and drives the driving slider to move linearly along the guide groove of the adjustment sliding table through the second lead screw nut. The driving slider is installed with a slider which is connected to the guide groove on the connecting seat in a sliding manner. The rotating action of the second lead screw is driven by the second driving motor through the second speed reducer and the second coupling. The third connecting seat is used for connecting the main bearing seat and the second speed reducer. The guide plate is fixed on the swing arm. The guide pressing plate is installed on the first connecting seat.
[0009] Optionally, the clamping mechanism comprises a lower clamp head, an upper clamp head, an action oil cylinder, a mounting seat, a second pressing plate, a second hinge shaft, an upper clamp block, a lower clamp block, and a guide clamp. The lower clamp head is fixed on the sliding table. The upper clamp head is constrained in the guide groove of the sliding table through the second pressing plate and can move linearly along the guide groove. The action oil cylinder is installed on the mounting seat which is fixed on the sliding table. The action oil cylinder drives the upper clamp head to move linearly through the second hinge shaft, thereby realizing the clamping action of the mechanism. The upper clamp block is installed on the upper clamp head. The lower clamp block is installed on the lower clamp head. Both of them are constrained by the guide clamps installed on the upper clamp head and the lower clamp head respectively. The upper clamp block and the lower clamp block are clamped with the steel pipe. Both of them are provided with a weld seam avoidance groove.
[0010] In summary, the present application includes the following beneficial technical effects: the present application adopts a mechanical mechanism to directly drive the steel pipe to rotate during the expanding process, according to the size of the steel pipe diameter specification, the swing center of the weld seam correction device is overlapped with the center of the steel pipe through the specification adjusting mechanism, the upper and lower clamps of the clamping mechanism are adapted to the steel pipe wall through the radial adjusting mechanism, the clamping mechanism clamps the steel pipe, and the steel pipe is relatively fixed with the mechanism, finally the steel pipe is driven by the swing mechanism to generate a torque rotating around its own axis, when the steel pipe advances, it can generate a rotating action relative to the expanding die, which can make the weld seam always in the expansion die avoidance groove during the mechanical expanding process of the straight seam welded pipe, avoid the die to produce unnecessary suppression to the weld seam, and effectively ensure the quality of the weld seam. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 Installation schematic of the mechanical expanding weld seam correction device on the pipe clamping trolley of the mechanical expanding unit Figure 1 .
[0012] Figure 2 Installation schematic of the mechanical expanding weld seam correction device on the pipe clamping trolley of the mechanical expanding unit Figure 2 .
[0013] Figure 3 Front view of the mechanical expanding weld seam correction device.
[0014] Figure 4 Side view of the mechanical expanding weld seam correction device.
[0015] Figure 5 Structure schematic of the specification adjusting mechanism.
[0016] Figure 6 Structure schematic of the radial adjusting mechanism.
[0017] Figure 7 Structure schematic of the swing mechanism.
[0018] Figure 8 Structure schematic of the clamping mechanism.
[0019] Explanation of reference signs: 1, specification adjusting mechanism; 2, radial adjusting mechanism; 3, swing mechanism; 4, clamping mechanism; 101, first connecting seat; 102, first pressing plate; 103, ear seat; 104, first hinge shaft; 105, lifting lug; 106, rotating shaft; 201, swing arm; 202, sliding table; 203, first lead screw; 204, first lead screw nut; 205, nut seat; 206, shear pin; 207, upper bearing seat; 208, second connecting seat; 209, first speed reducer; 210, first driving motor; 211, first coupling; 212, lower bearing seat; 213, inlay strip; 301, adjusting sliding table; 302, second lead screw; 303, second lead screw nut; 304, driving sliding block; 305, main bearing seat; 306, auxiliary bearing seat; 307, third connecting seat; 308, second coupling; 309, second speed reducer; 310, second driving motor; 311, sliding block; 312, guide plate; 313, guide pressing plate; 401, lower clamp; 402, upper clamp; 403, action oil cylinder; 404, mounting seat; 405, second pressing plate; 406, second hinge shaft; 407, upper clamping block; 408, lower clamping block; 409, guide clamp. DETAILED DESCRIPTION
[0020] The following will be described in detail in combination with the accompanying drawings. Figures 1-8 The present application is further described in detail.
[0021] The embodiment of the present application discloses a mechanical expanding welding seam deviation rectifying device.
[0022] Figure 1 、 Figure 2 With Figure 3 As shown in the figure, the mechanical expanding welding seam deviation rectifying device comprises a specification adjusting mechanism 1 mounted on a pipe clamping trolley of a mechanical expanding unit, a radial adjusting mechanism 2 connected with the pipe clamping trolley, a swing mechanism 3 mounted between the specification adjusting mechanism 1 and the radial adjusting mechanism 2 and used for controlling the swing amplitude of the radial adjusting mechanism 2, and a clamping mechanism 4 used for clamping a steel pipe.
[0023] Figure 4 With Figure 5 As shown in the figure, the specification adjusting mechanism 1 comprises a first connecting seat 101, a first pressing plate 102, an ear seat 103, a first hinge shaft 104, a lifting lug 105 and a rotating shaft 106. The first connecting seat 101 is constrained on the pipe clamping trolley of the mechanical expanding unit through the first pressing plate 102 and can only move in the vertical direction. A screw lifter mounted on the pipe clamping trolley is connected with the first connecting seat 101 through the ear seat 103, the first hinge shaft 104 and the lifting lug 105, so as to realize the movement of the mechanical expanding welding seam deviation rectifying device in the vertical direction. The center of the rotating shaft 106 is made to coincide with the center of the steel pipe to be expanded. The rotating shaft 106 is used for being connected with the radial adjusting mechanism 2.
[0024] The screw lifter is fixed to the pipe clamping trolley. The screw lifter is a lifting device in the prior art, mainly composed of a motor, a worm, a worm gear, a lead screw, and a lifting screw sleeve. The motor drives the worm to rotate, and then drives the worm gear to rotate, so that the lead screw rotates, and the lifting screw sleeve on the lead screw moves up and down to achieve the lifting effect. The lifting part (lifting screw sleeve) of the screw lifter is fixed to the specification adjustment mechanism 1, and the specification adjustment mechanism 1 is driven by the screw lifter to move up and down. The specification adjustment mechanism 1 is vertically arranged, and the radial adjustment mechanism 2 is rotationally connected to the specification adjustment mechanism 1.
[0025] Through the above arrangement, first, the steel pipe is arranged horizontally, and the pipe clamping trolley is arranged opposite to the end face of the steel pipe. The radial position of the clamping mechanism 4 is adjusted according to the pipe diameter of the steel pipe, so that the clamping part of the clamping mechanism 4 is located on the pipe wall of the steel pipe and clamps the weld on the side wall of the steel pipe, so that the weld of the steel pipe is located in the clearance groove of the expanding die, and the expanding die does not directly press the weld. When the weld changes in curvature, the swing range of the radial adjustment mechanism 2 is adjusted through the swing mechanism 3, so that the straight seam welded pipe fixed by the clamping mechanism 4 rotates relative to the expanding die, so that the weld of the straight seam welded pipe is always located in the clearance groove of the expanding die, and the weld strength of the straight seam welded pipe is improved.
[0026] Figure 6 As shown, the radial adjustment mechanism 2 includes a swing arm 201, a sliding table 202, a first lead screw 203, a first lead screw nut 204, a nut seat 205, a shear pin 206, an upper bearing seat 207, a second connecting seat 208, a first speed reducer 209, a first driving motor 210, a first coupling 211, a lower bearing seat 212, and an insert strip 213. The swing arm 201 is connected to the specification adjustment mechanism 1 through the rotating shaft 106. The sliding table 202 is constrained on the guide rail of the swing arm 201 through the insert strip 213, and can only move in the direction of the guide rail. The first lead screw 203 is installed on the swing arm 201 through the upper bearing seat 207 and the lower bearing seat 212. The sliding table 202 is driven to move in the direction of the guide rail through the first lead screw nut 204, the nut seat 205, and the shear pin 206. The second connecting seat 208 is installed on the swing arm 201 and coaxial with the upper bearing seat 207. The first driving motor 210 drives the first lead screw 203 to rotate through the first speed reducer 209 and the first coupling 211, thereby driving the sliding table 202 to move linearly. The first speed reducer 209 is installed on the second connecting seat 208.
[0027] Through the above arrangement, when it is necessary to adjust the radial position of the clamping mechanism 4 according to the pipe diameter of the straight seam welded pipe, the output shaft of the first driving motor 210 rotates, drives the first lead screw 203 to rotate, and drives the sliding table 202 to move linearly, thereby driving the clamping mechanism 4 connected to the sliding table 202 to move, meeting the needs of straight seam welded pipes of different pipe diameters.
[0028] Figure 7 As shown, the swing mechanism 3 includes an adjusting slide 301, a second lead screw 302, a second lead screw nut 303, a driving slide block 304, a main bearing seat 305, a secondary bearing seat 306, a third connecting seat 307, a second coupling 308, a second speed reducer 309, a second driving motor 310, a slide block 311, a guide plate 312, and a guide pressing plate 313. The adjusting slide 301 is fixed on the swing arm 201. The second lead screw 302 is installed on the adjusting slide 301 through the main bearing seat 305 and the secondary bearing seat 306. The driving slide block 304 is linearly moved along the guide groove of the adjusting slide 301 through the second lead screw nut 303. The driving slide block 304 is installed with the slide block 311, which is constrained by the guide groove on the first connecting seat 101, so that the radial adjusting mechanism 2 and the specification adjusting mechanism 1 produce relative swing action. The rotating action of the second lead screw 302 is driven by the second driving motor 310 through the second speed reducer 309 and the second coupling 308. The third connecting seat 307 is used for connecting the main bearing seat 305 and the second speed reducer 309. The guide plate 312 is fixed on the swing arm 201. The guide pressing plate is installed on the first connecting seat 101. The two cooperate to guide and share the force of the auxiliary mechanism.
[0029] Figure 8 As shown, the clamping mechanism 4 includes a lower clamp head 401, an upper clamp head 402, an action oil cylinder 403, a mounting seat 404, a second pressing plate 405, a second hinge shaft 406, an upper clamp block 407, a lower clamp block 408, and a guide clamp 409. The lower clamp head 401 is fixed on the slide 202. The upper clamp head 402 is constrained in the guide groove of the slide 202 through the second pressing plate 405 and can be linearly moved along the guide groove. The action oil cylinder 403 is installed on the mounting seat 404, which is fixed on the slide 202. The action oil cylinder 403 drives the linear movement of the upper clamp head 402 through the second hinge shaft 406, so as to realize the clamping action of the mechanism. The upper clamp block 407 is installed on the upper clamp head 402, and the lower clamp block 408 is installed on the lower clamp head 401. Both of them are constrained by the guide clamp 409 installed on the upper clamp head 402 and the lower clamp head 401 respectively and can rotate within a certain range to adapt to the clamping action. The upper clamp block 407 and the lower clamp block 408 are directly clamped with the steel pipe, so that the weld deviation correction device is fixed relative to the steel pipe. In addition, the upper clamp block 407 and the lower clamp block 408 are both designed with weld avoidance grooves, which can avoid the weld from being pressed by additional force.
[0030] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made on the structure, shape, and principle of the present application shall be covered by the protection scope of the present application.
Claims
1. A mechanical expansion weld alignment device, characterized by: The application relates to a pipe diameter expanding device, which comprises a pipe clamping trolley, a specification adjusting mechanism (1) connected with the pipe clamping trolley, a radial adjusting mechanism (2) installed on the specification adjusting mechanism (1) and capable of swinging relative to the specification adjusting mechanism (1), a swinging mechanism (3) installed between the specification adjusting mechanism (1) and the radial adjusting mechanism (2) and used for controlling the swinging range of the radial adjusting mechanism (2), and a clamping mechanism (4) used for clamping a steel pipe.
2. The mechanical expansion weld correction device of claim 1, wherein: The specification adjusting mechanism (1) comprises a first connecting seat (101), a first pressing plate (102), an ear seat (103), a first hinge shaft (104), a lifting lug (105) and a rotating shaft (106), the first connecting seat (101) is constrained on the pipe clamping trolley of the mechanical diameter expanding device through the first pressing plate (102), a screw lifter installed on the pipe clamping trolley is connected with the first connecting seat (101) through the ear seat (103), the first hinge shaft (104) and the lifting lug (105), the center of the rotating shaft (106) is coincided with the center of the steel pipe to be expanded, and the rotating shaft (106) is used for being connected with the radial adjusting mechanism (2).
3. The mechanical expansion weld correction device of claim 2, wherein: The radial adjusting mechanism (2) comprises a swing arm (201), a sliding table (202), a first screw rod (203), a first screw rod nut (204), a nut seat (205), a shear pin (206), an upper bearing seat (207), a second connecting seat (208), a first speed reducer (209), a first driving motor (210), a first coupling (211), a lower bearing seat (212) and an inlay strip (213), the swing arm (201) is connected with the specification adjusting mechanism (1) through the rotating shaft (106), the sliding table (202) is constrained on the guide rail of the swing arm (201) through the inlay strip (213), the first screw rod (203) is installed on the swing arm (201) through the upper bearing seat (207) and the lower bearing seat (212) and drives the sliding table (202) to move along the guide rail through the first screw rod nut (204), the nut seat (205) and the shear pin (206), the second connecting seat (208) is installed on the swing arm (201) and coaxial with the upper bearing seat (207), the first driving motor (210) drives the first screw rod (203) to rotate through the first speed reducer (209) and the first coupling (211), and the first speed reducer (209) is installed on the second connecting seat (208).
4. The mechanical expansion weld correction device of claim 3, wherein: The swing mechanism (3) comprises an adjusting sliding table (301), a second lead screw (302), a second lead screw nut (303), a driving sliding block (304), a main bearing seat (305), a secondary bearing seat (306), a third connecting seat (307), a second coupling (308), a second speed reducer (309), a second driving motor (310), a sliding block (311), a guide plate (312), and a guide pressing plate (313). The adjusting sliding table (301) is fixed on the swing arm (201). The second lead screw (302) is installed on the adjusting sliding table (301) through the main bearing seat (305) and the secondary bearing seat (306) and makes the driving sliding block (304) move linearly along the guide groove of the adjusting sliding table (301) through the second lead screw nut (303). The driving sliding block (304) is provided with the sliding block (311) which is slidably connected to the guide groove on the first connecting seat (101). The rotating action of the second lead screw (302) is driven by the second driving motor (310) through the second speed reducer (309) and the second coupling (308). The third connecting seat (307) is used for connecting the main bearing seat (305) and the second speed reducer (309). The guide plate (312) is fixed on the swing arm (201). The guide pressing plate is installed on the first connecting seat (101).
5. The mechanical expansion weld correction device of claim 4, wherein: The clamping mechanism (4) comprises a lower clamp head (401), an upper clamp head (402), an action oil cylinder (403), a mounting seat (404), a second pressing plate (405), a second hinge shaft (406), an upper clamp block (407), a lower clamp block (408), and a guide clamp (409). The lower clamp head (401) is fixed on the sliding table (202). The upper clamp head (402) is constrained in the guide groove of the sliding table (202) through the second pressing plate (405) and can move linearly along the guide groove. The action oil cylinder (403) is installed on the mounting seat (404) which is fixed on the sliding table (202). The action oil cylinder (403) drives the upper clamp head (402) to move linearly through the second hinge shaft (406), so as to realize the clamping action of the mechanism. The upper clamp block (407) is installed on the upper clamp head (402). The lower clamp block (408) is installed on the lower clamp head (401). The upper clamp block (407) and the lower clamp block (408) are clamped with the steel pipe. The upper clamp block (407) and the lower clamp block (408) are both provided with a weld seam avoidance groove.