Water-cooling welding tool for crank rotating shaft connecting piece
By designing a contouring module and a water-cooled welding fixture with circulating cooling channels, the problems of welding deformation and low cooling efficiency in crankshaft-type welded parts were solved, achieving an efficient and stable welding process and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SINOTEC CO LTD
- Filing Date
- 2025-04-09
- Publication Date
- 2026-04-17
AI Technical Summary
Existing crankshaft welding components suffer from problems such as severe welding deformation, uneven heat distribution, numerous welding defects, high operational skill requirements, low cooling efficiency, and lack of cooling water circulation during the welding process.
A water-cooled welding fixture comprising a contouring module, a water-cooled base, a rolling outer cylinder, and a fixed base was designed. The crank rotation is restricted by a limiting groove, and uniform cooling is achieved through a circulating cooling water channel. The combination of the rotatable rolling outer cylinder and the fixed base enables water circulation, thereby improving welding stability and efficiency.
Reduce welding deformation, improve welding quality stability and efficiency, avoid welding defects, realize automatic or semi-automatic welding, reduce operational technical requirements, and ensure cooling effect.
Smart Images
Figure CN224128956U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water-cooled welding technology, and in particular to a water-cooled welding fixture for crankshaft connectors. Background Technology
[0002] Currently, crankshaft-type welded parts are widely used in the automotive and semiconductor equipment industries. These welded parts are mostly welded using tungsten inert gas (TIG) welding, and the welding difficulty lies in:
[0003] 1. Severe welding deformation easily leads to deviations in key dimensions such as product perpendicularity and parallelism;
[0004] 2. Uneven heat distribution during welding can easily lead to welding defects such as weld collapse, lack of fusion, and cracks;
[0005] 3. It is generally done manually, which requires high skill from the welders, resulting in low consistency and inconsistent quality;
[0006] 4. Welding efficiency is low, product cooling time is long, and welders are easily burned;
[0007] 5. The tooling with cooling function cannot rotate, and the cooling water does not circulate. Summary of the Invention
[0008] The purpose of this invention is to provide a water-cooled welding fixture for crankshaft connectors, which reduces product deformation during the welding process, allows the product to be heated evenly and cooled quickly, and avoids welding defects.
[0009] To achieve the above objectives, the technical solution of this utility model is as follows:
[0010] A water-cooled welding fixture for a crankshaft connector includes a crankshaft and a crank. The welding position is located at the connection between the crankshaft and the crank. The welding fixture includes a contouring module, a water-cooling base, a rolling outer cylinder, and a fixed base. The lower end of the contouring module is fixedly connected to the upper end of the water-cooling base. The upper end of the contouring module has a radially extending limiting groove that accommodates the crank to restrict its rotation. The contouring module has a shaft hole at its center to accommodate the vertically penetrating crankshaft. The water-cooling base has a central hole at its center to accommodate the contouring module. The fixed base is fixedly fitted with... At the lower part of the water-cooled base, the rolling outer cylinder is sleeved on the outside of the fixed base. The rolling outer cylinder and the fixed base are rotatably connected. The upper part of the water-cooled base is provided with a circulating cooling water channel. The circulating cooling water channel has water inlet holes and water outlet holes symmetrically arranged on both sides. The water inlet hole is connected to the outer cylinder water inlet pipe of the rolling outer cylinder. The water outlet hole is connected to the outer cylinder water outlet pipe of the rolling outer cylinder. The outer cylinder water inlet pipe is connected to the base water inlet pipe of the fixed base. The outer cylinder water outlet pipe is connected to the base water outlet pipe of the fixed base. The base water inlet pipe and the base water outlet pipe open at the bottom end of the fixed base.
[0011] Furthermore, the upper part of the water-cooled base is provided with an inner ring, a middle ring and an outer ring, the middle ring has an opening on one side, the inner ring and the outer ring are connected by a partition, the partition passes radially through the opening of the middle ring, and the circulating cooling water channel is located in the annular gap between the inner ring and the middle ring and between the middle ring and the outer ring.
[0012] Furthermore, the water inlet is located on one side of the outer end of the partition.
[0013] Furthermore, the fixed base has a sliding groove on its outer side, and the rolling outer cylinder has a slider on its inner side. The fixed base and the rolling outer cylinder are rotatably connected through the sliding groove and the slider.
[0014] Furthermore, a sealing groove is provided on the outer side of the fixed base, and a sealing ring is provided in the sealing groove. The fixed base and the rolling outer cylinder are sealed by the sealing ring.
[0015] Furthermore, the contouring module and the water-cooling base are fixedly connected by positioning pins, which are evenly distributed around the outer periphery of the contouring module.
[0016] Furthermore, an upper rolling bearing and a lower rolling bearing are provided between the rolling outer cylinder and the fixed base. The upper rolling bearing is circumferentially embedded in the upper part of the rolling outer cylinder and the fixed base, and the lower rolling bearing is circumferentially embedded in the lower part of the rolling outer cylinder and the fixed base.
[0017] Furthermore, the upper end of the water-cooled base is provided with a water-cooled cover plate, which covers the upper end of the circulating cooling water channel.
[0018] Furthermore, a pad is provided at the bottom of the central hole, and the pad supports the rotating shaft.
[0019] The top-level contouring module of this utility model can rigidly constrain the perpendicularity and parallelism of the welded parts during the welding process, thereby improving welding stability.
[0020] This utility model relates to a water-cooled base with processing water channels and inlet / outlet holes, enabling the welding fixture to have a circulating water cooling function, good thermal conductivity, constant temperature during long-term use, reduced welding deformation, and improved welding efficiency and welding quality stability.
[0021] The bottom base of this utility model is fixed, while the outer cylinder rotates. The two are connected by water channels to achieve circulating water supply and prevent water pipes from getting tangled. The welding fixture of this utility model can be used with a positioner to achieve automatic or semi-automatic welding. Attached Figure Description
[0022] Figure 1 This is a three-dimensional structural diagram of the crankshaft connector;
[0023] Figure 2 This is a front view of the crankshaft connector.
[0024] Figure 3 This is a top view of the tooling of this utility model;
[0025] Figure 4 This is a sectional view of the tooling of this utility model;
[0026] Figure 5 This is an isometric side view of the tooling of this utility model;
[0027] Figure 6 This is a front view of the tooling of this utility model;
[0028] Figure 7 This is a schematic diagram of the circulating cooling water channel of this utility model;
[0029] Figure 8 This is an exploded view of the tooling of this utility model.
[0030] Figure label:
[0031] 1 Welded components, 2 Contouring modules, 3 Water-cooled cover plates, 4 Water-cooled bases, 5 Circulating cooling channels;
[0032] 6 Upper rolling bearing, 7 Sealing ring, 8 Gasket, 9 Lower rolling bearing, 10 Rolling outer cylinder;
[0033] 11. Fixed base; 12. Positioning pin;
[0034] 21 Limiting groove, 22 Shaft hole
[0035] 41 Inner ring, 42 Middle ring, 43 Outer ring, 44 Partition, 45 Center hole;
[0036] 51 Water inlet, 52 Water outlet;
[0037] 101 Outer cylinder inlet pipe, 102 Outer cylinder outlet pipe;
[0038] 111 Base inlet pipe, 112 Base outlet pipe, 113 Slide groove, 114 Sealing groove;
[0039] 13 Shaft, 14 Crank, 15 Washer, 16 Rivet, 17 Welding position. Detailed Implementation
[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0041] This utility model discloses a water-cooled welding fixture for crankshaft connectors, such as... Figure 1 and Figure 2 As shown, the crankshaft connector includes a shaft 13, a crank 14, a washer 15, and a rivet 16. The welding position 17 of the welded part 1 is located at the connection between the shaft 13 and the crank 14.
[0042] The water-cooled welding fixture of this utility model includes a contour module 2, a water-cooled base 4, a rolling outer cylinder 10, and a fixed base 11.
[0043] The lower end of the contour module 2 is fixedly connected to the upper end of the water-cooling base 4, such as... Figure 3 As shown, the contouring module 2 and the water-cooled base 4 are fixedly connected by positioning pins 12. The positioning pins 12 are evenly arranged on the four corners of the outer periphery of the contouring module 2. The four corner positioning pins 12 are fixed to facilitate tooling replacement.
[0044] like Figure 4 As shown, the water-cooled base 4 is made of 316L stainless steel. The upper end of the water-cooled base 4 is provided with a circular water-cooled cover plate 3, which covers the upper end of the circulating cooling water channel 5. The water-cooled cover plate 3 is made of brass to ensure good thermal conductivity. The water-cooled cover plate 3 and the water-cooled base 4 are brazed together with copper-based brazing filler metal to enable the welding fixture to have circulating water cooling function.
[0045] The water-cooled base 4 has a central hole 45 at its center to accommodate the entry of the contouring module 2. A pad 8 is provided at the bottom of the central hole 45 to support the bottom of the rotating shaft 13. The contouring module 2 has a shaft hole 22 at its center to accommodate the vertically penetrating rotating shaft 13.
[0046] The fixed base 11 is fixedly sleeved on the lower part of the water-cooled base 4, and the rolling outer cylinder 10 is movably sleeved on the outside of the fixed base 11. The rolling outer cylinder 10 and the fixed base 11 are rotatably connected.
[0047] like Figure 4 As shown, an upper rolling bearing 6 and a lower rolling bearing 9 are provided between the rolling outer cylinder 10 and the fixed base 11. The upper rolling bearing 6 is circumferentially embedded in the upper part of the rolling outer cylinder 10 and the fixed base 11, and the lower rolling bearing 9 is circumferentially embedded in the lower part of the rolling outer cylinder 10 and the fixed base 11.
[0048] like Figure 5 and Figure 6 As shown, the upper end of the contour module 2 is provided with a limiting groove 21 along the radial direction. The limiting groove 21 accommodates the crank 14 to limit the rotation of the crank 14.
[0049] like Figure 4 and Figure 7 As shown, the upper part of the water-cooled base 4 is provided with a circulating cooling water channel 5, and the two sides of the circulating cooling water channel 5 are symmetrically provided with water inlet 51 and water outlet 52.
[0050] like Figure 7 As shown, the upper part of the water-cooled base 4 is provided with an inner ring 41, a middle ring 42 and an outer ring 43. One side of the middle ring 42 is open. The inner ring 41 and the outer ring 43 are connected by a partition 44. The partition 44 passes through the opening of the middle ring 42 radially. The circulating cooling water channel 5 is located in the annular gap between the inner ring 41 and the middle ring 42 and between the middle ring 42 and the outer ring 43. The water inlet 51 is located on one side of the outer end of the partition 44.
[0051] In use, the annular gap between the inner ring 41 and the middle ring 42 forms the inner ring of the circulating cooling water channel 5, and the annular gap between the outer ring 43 and the middle ring 42 forms the outer ring of the circulating cooling water channel 5. Water first flows in from the inlet hole 51, and part of the water directly enters the outlet hole 52 counterclockwise from the outer ring of the circulating cooling water channel 5. The remaining water enters the outer ring of the circulating cooling water channel 5 counterclockwise from the inner ring of the circulating cooling water channel 5, and then enters the outlet hole 52 clockwise along the outer ring of the circulating cooling water channel 5, forming a double-ring circulating water channel with good heat conduction and a constant temperature during long-term use.
[0052] like Figure 8As shown, the outer side of the fixed base 11 is provided with a sliding groove 113, and the inner side of the rolling outer cylinder 10 is provided with a slider. The fixed base 11 and the rolling outer cylinder 10 are rotatably connected through the sliding groove 113 and the slider. During installation, the slider is interference-fitted with the outer side of the fixed base 11, and the slider is not easy to move vertically and fall out after being embedded in the sliding groove 113.
[0053] The circumferential angle of the chute 113 is less than 360°. When the rolling outer cylinder 10 rotates to the end position relative to the fixed base 11, the water inlet 51 is connected to the outer cylinder water inlet pipe 101 of the rolling outer cylinder 10, the water outlet 52 is connected to the outer cylinder water outlet pipe 102 of the rolling outer cylinder 10, the outer cylinder water inlet pipe 101 is connected to the base water inlet pipe 111 of the fixed base 11, and the outer cylinder water outlet pipe 102 is connected to the base water outlet pipe 112 of the fixed base 11. The base water inlet pipe 111 and the base water outlet pipe 112 are provided with water inlet and water outlet at the bottom opening of the fixed base 11.
[0054] like Figure 8 As shown, the outer side of the fixed base 11 is provided with six sealing grooves 114, and each sealing groove 114 is provided with a corresponding sealing ring 7. The fixed base 11 and the rolling outer cylinder 10 are sealed by the six sealing rings 7 to prevent the cooling water from overflowing.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A water-cooled welding fixture for a crankshaft connector, the crankshaft connector comprising a shaft (13) and a crank (14), wherein the welding position (17) of the welded part (1) is located at the connection between the shaft (13) and the crank (14), characterized in that, The welding fixture includes a contouring module (2), a water-cooled base (4), a rolling outer cylinder (10), and a fixed base (11). The lower end of the contouring module (2) is fixedly connected to the upper end of the water-cooled base (4). The upper end of the contouring module (2) is provided with a limiting groove (21) along the radial direction. The limiting groove (21) accommodates the crank (14) to limit the rotation of the crank (14). The axis of the contouring module (2) is provided with a shaft hole (22) for accommodating the vertically penetrating shaft (13). The axis of the water-cooled base (4) is provided with a central hole (45) for accommodating the entry of the contouring module (2). The fixed base (11) is fixedly sleeved on the lower part of the water-cooled base (4). The rolling outer cylinder (10) is sleeved on the outside of the fixed base (11). The water-cooled base (4) is rotatably connected to the fixed base (11). The upper part of the water-cooled base (4) is provided with a circulating cooling water channel (5). The circulating cooling water channel (5) is symmetrically provided with water inlet (51) and water outlet (52) on both sides. The water inlet (51) is connected to the outer cylinder water inlet pipe (101) of the rolling outer cylinder (10). The water outlet (52) is connected to the outer cylinder water outlet pipe (102) of the rolling outer cylinder (10). The outer cylinder water inlet pipe (101) is connected to the base water inlet pipe (111) of the fixed base (11). The outer cylinder water outlet pipe (102) is connected to the base water outlet pipe (112) of the fixed base (11). The base water inlet pipe (111) and the base water outlet pipe (112) open at the bottom end of the fixed base (11).
2. The crankshaft connecting piece water cooling welding tooling according to claim 1, characterized in that, The upper part of the water-cooled base (4) is provided with an inner ring (41), a middle ring (42) and an outer ring (43). The middle ring (42) has an opening on one side. The inner ring (41) and the outer ring (43) are connected by a partition (44). The partition (44) passes through the opening of the middle ring (42) radially. The circulating cooling water channel (5) is located in the annular gap between the inner ring (41) and the middle ring (42) and between the middle ring (42) and the outer ring (43).
3. The crankshaft connecting piece water cooling welding tooling according to claim 2, characterized in that, The water inlet (51) is located on one side of the outer end of the partition (44).
4. The crankshaft connector water-cooled welding fixture of claim 1, wherein, The fixed base (11) has a sliding groove (113) on its outer side, and the rolling outer cylinder (10) has a slider on its inner side. The fixed base (11) and the rolling outer cylinder (10) are rotatably connected through the sliding groove (113) and the slider.
5. The crankshaft connector water-cooled welding fixture of claim 1, wherein, The fixed base (11) has a sealing groove (114) on its outer side, and a sealing ring (7) is provided in the sealing groove (114). The fixed base (11) and the rolling outer cylinder (10) are sealed by the sealing ring (7).
6. The water-cooled welding fixture for the crankshaft connector according to claim 1, characterized in that, The contouring module (2) and the water-cooled base (4) are fixedly connected by positioning pins (12), which are evenly arranged on the outer periphery of the contouring module (2).
7. The crankshaft connector water-cooled welding fixture of claim 1, wherein, An upper rolling bearing (6) and a lower rolling bearing (9) are provided between the rolling outer cylinder (10) and the fixed base (11). The upper rolling bearing (6) is circumferentially embedded in the upper part of the rolling outer cylinder (10) and the fixed base (11), and the lower rolling bearing (9) is circumferentially embedded in the lower part of the rolling outer cylinder (10) and the fixed base (11).
8. The crankshaft connector water-cooled welding fixture of claim 1, wherein, The upper end of the water-cooled base (4) is provided with a water-cooled cover plate (3), which covers the upper end of the circulating cooling water channel (5).
9. The crankshaft connector water-cooled welding fixture of claim 1, wherein, The bottom of the central hole (45) is provided with a pad (8), which supports the rotating shaft (13).