A welding tool for precise positioning of a part plate
By designing welding fixtures for square tubes and movable adjustment plates, the problem of frequent tooling replacements in existing fixtures was solved, enabling precise positioning and efficient adaptation of part plates, reducing tooling inventory and costs, and improving welding accuracy and product consistency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU WENHUI STEEL ENG
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-12
AI Technical Summary
Existing welding positioning fixtures need to be frequently replaced when the hole spacing of parts changes, resulting in a large inventory of fixtures, high costs, and large hole spacing errors, which affects product interchangeability.
Design a welding fixture that includes a square tube, a movable adjustment plate, and a mounting plate. Through the cooperation of the adjustment groove and bolts, the mounting plate can be flexibly adjusted, ensuring the precise alignment of the positioning holes and reducing the types and costs of tooling.
It enables efficient tooling adaptation to diverse parts, reduces tooling types and costs, ensures the accuracy of positioning holes, and improves the precision of the welding process and product consistency.
Smart Images
Figure CN224347215U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding equipment technology, and more specifically, to a welding fixture for precise positioning of part plates. Background Technology
[0002] Tooling refers to the technological equipment used in the production process. A workpiece refers to a component of a product during the manufacturing process.
[0003] A search revealed that patent publication number CN217702094U discloses a structural component assembly and welding positioning fixture for assembling and welding large metal structural components with intersecting planes. The fixture includes an end limiting plate for restricting and positioning the structural components on a first intersecting plane and a bottom limiting plate for restricting and positioning the structural components on a second intersecting plane. An I-axis clamp is provided on the end limiting plate, and a II-axis clamp is provided on the bottom limiting plate. The I-axis and II-axis clamps are used for adjusting the spacing between structural components and clamping the intersecting planes, ensuring the position and orientation of the structural components. The beneficial effects are: supporting batch assisted assembly, not damaging the workpiece surface; supporting workpieces of various sizes; rapid positioning; easy welding; and limiting workpiece deformation during welding. The inventors discovered the following problems with the existing technology during the development of this utility model:
[0004] Existing welding positioning fixtures are typically designed for the positioning hole spacing of specific parts. When the hole spacing of the parts changes, the entire set of fixtures needs to be re-processed. During production changeovers, fixtures need to be frequently changed, reducing efficiency and resulting in a large variety of fixtures in stock, which takes up a lot of cost and space. Furthermore, the positioning holes are usually determined by manual measurement and marking. Due to the influence of the operator's experience, the hole spacing error causes the mounting holes of the welded parts to not be able to accurately match the fasteners such as bolts and pins, requiring rework and hole repair. In mass production, this can easily lead to poor hole spacing consistency, thus affecting product interchangeability.
[0005] Therefore, a welding fixture for precise positioning of part plates is proposed to address the above problems. Utility Model Content
[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding fixture for precise positioning of part plates, so as to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a welding fixture for precise positioning of a part plate, comprising a square tube, a movable adjustment plate, a mounting plate and a lower positioning hole, wherein a crossbar is welded to the right side of the rear end of the square tube, a fixing plate is welded to the rear of the right side of the crossbar, and the movable adjustment plate is welded to the left side of the square tube;
[0008] The upper end of the movable adjustment plate has an adjustment groove in its inner cavity, and there are two sets of adjustment grooves. The mounting plate is welded to the left side of the movable adjustment plate, and there are two sets of mounting plates. The upper end of the mounting plate has an upper positioning hole in its inner cavity, and the lower positioning hole is opened in the inner cavity at the lower end of the mounting plate. Bolts are installed in the inner cavity of the adjustment groove.
[0009] Preferably, the two sets of adjustment grooves are arranged in parallel, and four sets of bolts are provided, with two sets of bolts installed in the inner cavity of each set of adjustment grooves.
[0010] Preferably, the two sets of bolts pass through the inner cavities of the two sets of adjustment grooves and are simultaneously inserted into the inner cavity of one set of lower positioning holes to achieve fixation, and the upper end of one set of adjustment grooves is provided with an adjustment scale.
[0011] Preferably, when the bolts are adjusted, each set of movable adjusting plates can slide along the inner cavity of the two sets of adjusting grooves via the two sets of bolts respectively.
[0012] Preferably, a reinforcing plate is welded to one side of the connection between the square tube and the crossbar, and the reinforcing plate is triangular in shape.
[0013] Preferably, a lifting ring is welded to the upper end of the crossbar, and the lifting ring is tilted at 45° toward the side closer to the reinforcing plate.
[0014] Preferably, the inner cavity of the square tube is hollow, and the square tube and the crossbar form an L-shape.
[0015] Preferably, the inner cavity at the upper end of the fixing plate is provided with fixing holes, and the two sets of upper positioning holes are aligned on the same horizontal line.
[0016] The technical effects and advantages of this utility model are as follows:
[0017] 1. Compared with the existing technology, the welding fixture for precise positioning of part plates uses the adjustment groove of the movable adjustment plate and the bolt to make the two sets of mounting plates slide along the adjustment groove. It can quickly adapt to positioning holes with different spacing on the component, and the spacing between the two sets of mounting plates can be flexibly adjusted. There is no need to customize special fixtures for components with different hole spacings, which significantly improves the adaptability of the fixture to diverse parts and reduces the types and costs of fixtures.
[0018] 2. Compared with existing technologies, this welding fixture for precise positioning of part plates is designed so that the positioning holes on the main part of the fixture and the mounting plate are all machined. This allows the diameter tolerance of the positioning holes to be controlled within the precision range, ensuring that the fit clearance between the positioning pin and the hole is extremely small, eliminating human error from manual scribing, ensuring the relative dimensional accuracy between the positioning holes, and making the fixture itself a high-precision positioning reference. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.
[0020] Figure 2 This is a top view of the structure of this utility model.
[0021] Figure 3 This is a front view structural diagram of the present utility model.
[0022] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram.
[0023] The attached diagram is labeled as follows: 1. Square tube; 2. Reinforcing plate; 3. Fixing plate; 31. Fixing hole; 4. Lifting ring; 5. Hollow cavity; 6. Crossbar; 7. Movable adjusting plate; 8. Adjusting groove; 9. Mounting plate; 10. Upper positioning hole; 11. Lower positioning hole; 12. Bolt; 13. Adjustment scale. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0025] As attached Figures 1 to 4 The welding fixture shown includes a square tube 1, a movable adjustment plate 7, a mounting plate 9, and a lower positioning hole 11. A crossbar 6 is welded to the right side of the rear end of the square tube 1, serving as the main frame of the fixture and forming an L-shaped structure with the crossbar 6. The rectangular cross-section design of the square tube 1 and the crossbar 6 provides high bending and torsional strength as the core load-bearing component. A fixing plate 3 is welded to the rear right side of the crossbar 6. A fixing hole 31 is opened in the inner cavity at the upper end of the fixing plate 3. The fixing plate 3 is connected to the component of the part plate by installing a positioning pin through the fixing hole 31. The movable adjustment plate 7 is welded to the left side of the square tube 1. The movable adjustment plate 7 serves as the sliding base of the mounting plate 9. An adjustment groove 8 is opened in the inner cavity at the upper end of the movable adjustment plate 7. Two sets of adjustment grooves 8 are provided to provide a sliding path for the mounting plate 9, allowing the two sets of mounting plates 9 to move along the grooves to adapt to positioning holes with different spacing on the component.
[0026] Mounting plate 9 is welded to the left side of movable adjustment plate 7. Mounting plate 9 has two sets. The upper cavity of the mounting plate 9 has upper positioning holes 10. The two sets of upper positioning holes 10 are aligned on the same horizontal line. The upper positioning holes 10 of mounting plate 9 are rigidly connected to the component holes through positioning pins and serve as the direct positioning reference for the part plate. The lower positioning hole 11 is opened in the lower cavity of mounting plate 9. The inner cavity of adjustment groove 8 is fitted with bolts 12. The lower positioning hole 11 cooperates with bolts 12 and the matching hole spacing is adjusted by sliding. Example 2
[0027] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:
[0028] In a preferred embodiment, the two sets of adjustment grooves 8 are arranged in parallel. The parallel adjustment grooves 8 provide a strictly linear sliding path for the mounting plate 9, preventing the mounting plate 9 from shifting during adjustment due to groove skewing. Four sets of bolts 12 are provided, with two sets of bolts 12 installed in the inner cavity of each set of adjustment grooves 8. The two sets of bolts 12 pass through the inner cavities of the two sets of adjustment grooves 8 and are simultaneously inserted into the inner cavity of one set of lower positioning holes 11 for fixation. An adjustment scale 13 is provided at the upper end of one set of adjustment grooves 8, and the adjustment scale 13 is for the mounting plate 9. The sliding mechanism provides intuitive distance markings, allowing operators to control the amount of movement via a scale, avoiding errors from manual estimation and standardizing hole spacing adjustment. When adjusting the bolts 12, each set of movable adjustment plates 7 can slide along the inner cavity of the two sets of adjustment grooves 8 via two sets of bolts 12. During adjustment, the two sets of bolts 12 serve as sliding fulcrums for the mounting plate 9, ensuring that the mounting plate 9 is balanced in force when sliding along the adjustment grooves 8. The lower positioning hole 11 serves as the final fixing point. After the bolts 12 are inserted, they are tightened with nuts to completely lock the position of the adjusted mounting plate 9.
[0029] In a preferred embodiment, a reinforcing plate 2 is welded to one side of the connection between the square tube 1 and the crossbar 6. The reinforcing plate 2 is triangular in shape. A lifting ring 4 is welded to the upper end of the crossbar 6. The lifting ring 4 is tilted at 45° to the side closer to the reinforcing plate 2. The tilted lifting ring 4 is lifted by the user or equipment. A hollow cavity 5 is opened in the inner cavity of the square tube 1. The hollow cavity 5 reduces the weight without weakening the bending and torsional strength of the rectangular cross section of the square tube 1. The square tube 1 and the crossbar 6 form an L-shape. The L-shaped frame of the square tube 1 and the crossbar 6 is suitable for right-angle components and positioning vertical surfaces.
[0030] The working process of this utility model is as follows: First, the positioning pin is inserted through the fixing hole 31 at the upper end of the fixing plate 3 to install the tooling body of the L-shaped frame composed of square tube 1 and crossbar 6 and the component where the part plate is located. At the same time, the triangular structure reinforcement plate 2 strengthens the rigidity of the connection between square tube 1 and crossbar 6 to avoid deformation under force. Then, according to the actual spacing of the positioning holes 10 on the component, the four sets of bolts 12 in the adjustment groove 8 are loosened to make the two sets of mounting plates 9 disengage from the locked state and slide along the linear path of the two sets of parallel adjustment grooves 8. The operator observes the adjustment scale 13 at the upper end of the adjustment groove 8 and controls the movement distance of the mounting plate 9 with millimeter-level precision so that the upper positioning hole 10 and the lower positioning hole 11 of the mounting plate 9 are aligned with the upper and lower holes of the component respectively. During the adjustment process, the two sets of bolts 12 in each set of adjustment grooves 8 serve as symmetrical fulcrums to ensure that the mounting plate 9 is subjected to balanced force and has no tilt or offset when it is translated.
[0031] After alignment, tighten the four sets of bolts 12 in sequence, so that the bolt shank passes through the adjustment groove 8 and is inserted into the lower positioning hole 11 at the lower end of the mounting plate 9. Through the friction between the bolt head and the movable adjustment plate 7 and the limiting effect of the lower positioning hole 11, the two sets of bolts 12 are fixed at two points, locking the mounting plate 9 in the target position. At the same time, positioning pins are inserted into the fixing hole 31 in the fixing plate 3, the mounting plate 9 and the component hole. The nut is tightened by the thread at the tail of the positioning pin, so that the fixing hole 31 of the tooling and the upper positioning hole 10 of the mounting plate 9 are tightly fitted with the surface of the component. During the welding process, the hollow cavity 5 of the square tube 1 reduces the weight of the tooling while maintaining the cross-sectional strength. The L-shaped frame and the reinforcing plate 2 jointly resist the welding heat deformation and vibration. The lifting ring 4 is mainly used for handling. The above is the working principle of this welding tooling for precise positioning of part plates.
Claims
1. A welding fixture for precise positioning of a part plate, comprising a square tube (1), a movable adjusting plate (7), a mounting plate (9), and a lower positioning hole (11), characterized in that: A crossbar (6) is welded to the right side of the rear end of the square tube (1), a fixing plate (3) is welded to the rear of the right side of the crossbar (6), and the movable adjustment plate (7) is welded to the left side of the square tube (1). The upper cavity of the movable adjustment plate (7) is provided with an adjustment groove (8), and there are two sets of adjustment grooves (8). The mounting plate (9) is welded to the left side of the movable adjustment plate (7), and there are two sets of mounting plates (9). The upper cavity of the mounting plate (9) is provided with an upper positioning hole (10), and the lower positioning hole (11) is opened in the lower cavity of the mounting plate (9). The inner cavity of the adjustment groove (8) is equipped with a bolt (12).
2. The welding fixture for precise positioning of a part plate according to claim 1, characterized in that: The two sets of adjustment grooves (8) are arranged in parallel, and four sets of bolts (12) are provided. Two sets of bolts (12) are installed in the inner cavity of each set of adjustment grooves (8).
3. The welding fixture for precise positioning of a part plate according to claim 2, characterized in that: Two sets of bolts (12) are inserted into the inner cavity of one set of lower positioning holes (11) after passing through the inner cavity of the two sets of adjustment grooves (8) respectively. An adjustment scale (13) is provided at the upper end of one set of adjustment grooves (8).
4. A welding fixture for precise positioning of a part plate according to claim 3, characterized in that: When the bolts (12) are adjusted, each set of movable adjustment plates (7) can slide along the inner cavity of the two sets of adjustment grooves (8) through the two sets of bolts (12).
5. A welding fixture for precise positioning of a part plate according to claim 1, characterized in that: A reinforcing plate (2) is welded to one side of the connection between the square tube (1) and the crossbar (6), and the reinforcing plate (2) is triangular in shape.
6. A welding fixture for precise positioning of a part plate according to claim 5, characterized in that: The upper end of the crossbar (6) is welded with a lifting ring (4), which is tilted at 45° toward the side closer to the reinforcing plate (2).
7. A welding fixture for precise positioning of a part plate according to claim 5, characterized in that: The square tube (1) has a hollow cavity (5) inside, and the square tube (1) and the crossbar (6) form an L-shape.
8. A welding fixture for precise positioning of a part plate according to claim 1, characterized in that: The upper cavity of the fixing plate (3) is provided with fixing holes (31), and the two sets of upper positioning holes (10) are aligned on the same horizontal line.