Special-shaped sheet welding fixture
By designing multiple adjustable clamping plates and a lead screw drive for the irregular sheet welding fixture, the adaptability and stability issues of the irregular sheet welding fixture were solved, achieving efficient and precise positioning of irregular sheets and improving welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NEW SUPERCONDUCTING TECHNOLOGY (CHANGZHOU) CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-07
AI Technical Summary
Existing welding fixtures for irregularly shaped pieces suffer from high customization costs, complex adjustments, difficulty in adapting to multi-variety, small-batch production, and unstable welding quality, especially prone to loosening under high temperature or external force.
A welding fixture including a shaped piece clamping mechanism and a workpiece clamping mechanism was designed. It utilizes multiple sets of adjustable clamping plates and lead screw drives, along with a pressure assembly, to achieve precise positioning and stable clamping of shaped pieces, adapting to the needs of shaped pieces of different shapes and sizes.
It enables flexible adaptation and precise positioning of irregularly shaped pieces, improves the consistency and stability of welding quality, and reduces equipment investment costs and changeover cycles.
Smart Images
Figure CN224464034U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of welding technology, specifically relating to a welding fixture for irregularly shaped pieces. Background Technology
[0002] In fields such as machinery manufacturing, automotive parts, and aerospace, welding irregularly shaped sheets to workpieces is a common processing procedure. Due to their irregular shapes (such as non-standard polygons, protrusions, or recesses), the welding and assembly of irregularly shaped sheets to workpieces requires extremely high clamping precision and stability.
[0003] In existing technologies, welding clamps for irregularly shaped pieces often employ customized fixtures, meaning that a special clamping structure is designed based on the specific shape of the irregularly shaped piece. However, this approach has significant drawbacks:
[0004] 1) Customized fixtures can only match irregularly shaped pieces of a single shape. When the specifications or shape of the irregularly shaped pieces change, the fixtures need to be redesigned and manufactured, resulting in high equipment investment costs and long changeover cycles, making it difficult to meet the production needs of multiple varieties and small batches.
[0005] 2) The clamping position adjustment of traditional fixtures mostly relies on manual operation and lacks precise positioning reference, which can easily lead to the docking deviation between irregular pieces and workpieces, resulting in quality problems such as weld misalignment and insufficient welding strength.
[0006] 3) Some fixtures cannot continuously and stably press the irregular pieces against the workpiece surface during the welding process. Especially under high welding temperature or external force, the irregular pieces are prone to loosening, affecting the consistency of welding quality. Summary of the Invention
[0007] The purpose of this utility model is to provide a welding fixture with a simple structure and reasonable design in order to solve the above problems.
[0008] This utility model achieves the above objectives through the following technical solutions:
[0009] This utility model provides a welding fixture for irregularly shaped pieces, including a frame, an irregularly shaped piece clamping mechanism, and a workpiece clamping mechanism, wherein the irregularly shaped piece clamping mechanism is located on the side of the workpiece clamping mechanism;
[0010] The irregular piece clamping mechanism includes multiple sets of clamping plates, a mounting plate, and a drive assembly. The mounting plate is slidably connected to the frame and connected to the drive end of the drive assembly. The surface of the mounting plate has grooves corresponding to the multiple sets of clamping plates. Each set of grooves has a lead screw rotatably connected to its inner wall. The multiple sets of clamping plates are threaded to the corresponding lead screw surfaces. Rotating the multiple sets of lead screws causes the clamping plates to move along the grooves, so that the multiple sets of clamping plates clamp the edges of the irregular piece. The drive assembly drives the mounting plate to approach the workpiece clamping mechanism to align the workpiece and the irregular piece.
[0011] The irregular piece clamping mechanism is equipped with a pressing component, which presses the irregular piece against the surface of the workpiece.
[0012] As a further optimization of this utility model, a mounting base and a fixture base are fixedly connected to the frame, the workpiece clamping mechanism is mounted on the fixture base, and the irregular piece clamping mechanism is mounted on the mounting base.
[0013] As a further optimization of this utility model, the clamping pieces are provided in four sets, and the four sets of clamping pieces are arranged in four directions pointing in a cross shape with the center point of the mounting plate as the reference.
[0014] As a further optimization of this utility model, the driving component includes a first driving member, a slide rail and a slider. The slide rail is fixedly connected to the surface of the mounting base, the slider is slidably connected to the surface of the slide rail, and the mounting plate is connected to the surface of the slider and fixedly connected to the driving end of the first driving member.
[0015] As a further optimization of this utility model, the pressing component includes a second driving member and an extrusion plate. A base is connected to the side surface of the mounting plate away from the workpiece clamping mechanism. The second driving member is connected to the base. A placement groove is opened on the side surface of the mounting plate near the workpiece clamping mechanism. The extrusion plate is placed in the placement groove. The driving end of the second driving member extends into the placement groove and is fixedly connected to the extrusion plate.
[0016] As a further optimization of this utility model, both the first driving component and the second driving component are cylinders.
[0017] As a further optimization of this utility model, the workpiece clamping mechanism includes a limiting block, a limiting pin, and a fastening nut. The surface of the fixture base is provided with a through sliding groove. Two sets of limiting blocks are provided, and the two sets of limiting blocks are slidably connected to the sliding groove near both ends. The limiting pins are provided on both sides of the end of the sliding groove. The limiting pins extend into the sliding groove and are respectively connected to the two sets of limiting blocks. Bolts are connected to the lower surface of both sets of limiting blocks. The bolts extend out of the sliding groove. The fastening nut is provided corresponding to the bolt and is threadedly connected to the surface of the bolt.
[0018] The beneficial effects of this utility model are as follows: The irregular piece clamping mechanism of this utility model uses multiple sets of independently adjustable clamping plates, which move along the slide groove with the help of a screw drive. It can flexibly adapt to the edge clamping requirements of irregular pieces of different shapes and sizes. Moreover, the clamping plates can be precisely adjusted in position by the screw, which can accurately clamp the edge of the irregular piece and ensure that the positioning reference of the irregular piece is uniform. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the irregular piece clamping mechanism of this utility model;
[0021] Figure 3 This is a schematic diagram of the pressure-resistant component structure of this utility model;
[0022] Figure 4 This is a schematic diagram of the workpiece clamping mechanism of this utility model;
[0023] Figure 5 This is a schematic diagram of the partially clampable irregular-shaped sheet structure of this utility model.
[0024] In the diagram: 1. Frame; 2. Shaped piece clamping mechanism; 21. Clamping piece; 22. Mounting plate; 23. Drive assembly; 231. First drive component; 232. Slide rail; 233. Slider; 24. Slide groove; 25. Lead screw; 3. Workpiece clamping mechanism; 31. Limiting block; 32. Limiting pin; 33. Fastening nut; 34. Sliding groove; 35. Bolt; 4. Pressing assembly; 41. Second drive component; 42. Extrusion plate; 43. Placement groove; 5. Mounting base; 6. Fixture base; 7. Base. Detailed Implementation
[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0026] like Figure 1 and Figure 2 The structure shown is that of a welding fixture for irregularly shaped pieces, including a frame 1, an irregularly shaped piece clamping mechanism 2 and a workpiece clamping mechanism 3. The irregularly shaped piece clamping mechanism 2 is used to clamp irregularly shaped pieces, and the workpiece clamping mechanism 3 is used to clamp workpieces. Both the workpiece clamping mechanism 3 and the irregularly shaped piece clamping mechanism 2 are connected to the frame 1, and the irregularly shaped piece clamping mechanism 2 is located on the side of the workpiece clamping mechanism 3.
[0027] The irregular piece clamping mechanism 2 includes multiple sets of clamping plates 21, a mounting plate 22, and a drive assembly 23. The mounting plate 22 is slidably connected to the frame 1 and connected to the drive end of the drive assembly 23. The surface of the mounting plate 22 is provided with sliding grooves 24 corresponding to the multiple sets of clamping plates 21. Each set of sliding grooves 24 is rotatably connected to a lead screw 25 on its inner wall. The multiple sets of clamping plates 21 are threadedly connected to the surface of the corresponding lead screw 25. Rotating the multiple sets of lead screws 25 causes the clamping plates 21 to move along the sliding grooves 24, so that the multiple sets of clamping plates 21 clamp the edge of the irregular piece. The drive assembly 23 drives the mounting plate 22 to approach the workpiece clamping mechanism 3 to align the workpiece and the irregular piece.
[0028] The irregular piece clamping mechanism 2 is equipped with a pressing component 4, which presses the irregular piece against the surface of the workpiece.
[0029] It should be noted that the shapes of the irregularly shaped pieces include, but are not limited to, those shown below. Figure 5 The structure shown.
[0030] In practical use, the workpiece is first placed on the workpiece clamping mechanism 3. The drive assembly 23 drives the clamping piece 21 to approach the workpiece. First, the bottom and side lead screws 25 are adjusted so that the corresponding clamping piece 21 contacts the edge of the workpiece to determine the position of the clamping piece 21. Then, the clamping piece 21 is moved away from the workpiece to facilitate the insertion of the irregular piece. Next, the irregular piece is placed in the middle of the adjusted clamping piece 21 and is made to adhere to the surface of the mounting plate 22. Finally, the lead screw 25 at the top is adjusted so that the clamping piece 21 clamps the irregular piece. After the irregular piece is clamped, the drive assembly 23 is started so that the clamped irregular piece adheres to the surface of the workpiece. First, spot welding is performed. Then, the pressing assembly 4 can be used to press the irregular piece against the surface of the workpiece. At this time, the drive assembly 23 can be used to move the clamping piece 21 away from the irregular piece (i.e., release the irregular piece). Finally, the entire welding is completed.
[0031] It should be noted that a positioner can be used in conjunction with welding, and then a welding machine can be used for welding. The positioner and welding machine are existing devices, so they will not be described in detail here.
[0032] In this embodiment, the lead screw 25 can be manually adjusted. When manually adjusting the lead screw 25, a fixing nut can be used to lock it to prevent the lead screw 25 from rotating. In other embodiments, a motor can be installed at the end of the lead screw 25 away from the slide groove 24. The motor can drive the rotation of the lead screw 25, thereby driving the clamping piece 21 to move.
[0033] Furthermore, a mounting base 5 and a fixture base 6 are fixedly connected to the frame 1, the workpiece clamping mechanism 3 is installed on the fixture base 6, and the irregular piece clamping mechanism 2 is installed on the mounting base 5.
[0034] Furthermore, four sets of clamping plates 21 are provided, and the four sets of clamping plates 21 are located in four directions pointing in a cross shape with the center point of the mounting plate 22 as the reference.
[0035] It should be noted that the side surface of the clamping piece 21 that contacts the irregular piece near the workpiece is set at an angle, which facilitates the alignment of the irregular piece and the workpiece.
[0036] refer to Figure 3The structure shown includes a first drive component 231, a slide rail 232, and a slider 233. The slide rail 232 is fixedly connected to the surface of the mounting base 5, and the slider 233 is slidably connected to the surface of the slide rail 232. The mounting plate 22 is connected to the surface of the slider 233 and is fixedly connected to the drive end of the first drive component 231.
[0037] In practical use, the first driving component 231 can drive the mounting plate 22 connected to the slider 233 to move along the slide rail 232.
[0038] It should be noted that the slider 233 has a certain length, so the clamping piece 21 still maintains its positional accuracy after the mounting plate 22 leaves the mounting base 5.
[0039] Furthermore, the pressing component 4 includes a second driving member 41 and a pressing plate 42. A base 7 is connected to the side surface of the mounting plate 22 away from the workpiece clamping mechanism 3. The second driving member 41 is connected to the base 7. A placement groove 43 is opened on the side surface of the mounting plate 22 near the workpiece clamping mechanism 3. The pressing plate 42 is disposed in the placement groove 43. The driving end of the second driving member 41 extends into the placement groove 43 and is fixedly connected to the pressing plate 42.
[0040] In actual use, when the drive component 23 drives the mounting plate 22 to move, it drives the pressing component 4 to move synchronously. After the irregular piece and the workpiece are welded together, when the drive component 23 drives the mounting plate 22 away from the irregular piece, the second drive component 41 is activated, so that the extrusion plate 42 always abuts against the surface of the irregular piece.
[0041] It should be noted that the shape of the extrusion plate 42 is not limited and can be adjusted according to the shape of the irregular piece. The extrusion plate 42 can be detachably connected to the driving end of the second driving member 41. Specifically, it can be connected by thread, screw, plug-in or other methods. The shape of the placement groove 43 can be a combination of multiple extrusion plates 42 of different shapes.
[0042] Furthermore, both the first drive component 231 and the second drive component 41 are cylinders.
[0043] It should be noted that the first driving component 231 and the second driving component 41 can be any kind of mechanical structure capable of linear motion, specifically, they can also be electric push rods, hydraulic cylinders, etc.
[0044] refer to Figure 4The structure shown includes a workpiece clamping mechanism 3 comprising a limiting block 31, a limiting pin 32, and a fastening nut 33. A through sliding groove 34 is provided on the surface of the fixture base 6. Two sets of limiting blocks 31 are provided, and the two sets of limiting blocks 31 are slidably connected to the sliding groove 34 near both ends. The limiting pins 32 are provided on both sides of the end of the sliding groove 34, and the limiting pins 32 extend into the sliding groove 34 and are respectively connected to the two sets of limiting blocks 31. Bolts 35 are connected to the lower surface of both sets of limiting blocks 31, and the bolts 35 extend out of the sliding groove 34. The fastening nut 33 is correspondingly provided with the bolts 35 and is threadedly connected to the surface of the bolts 35.
[0045] In actual use, the workpiece is placed on the fixture base 6 and located between the two sets of limit blocks 31. After moving the limit pin 32, the limit block 31 can be moved to the appropriate position, and then the fastening nut 33 can be tightened to clamp the workpiece.
[0046] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A profile sheet welding jig characterized by comprising: It includes a frame, a shaped piece clamping mechanism, and a workpiece clamping mechanism, wherein the shaped piece clamping mechanism is located on the side of the workpiece clamping mechanism; The irregular piece clamping mechanism includes multiple sets of clamping plates, a mounting plate, and a drive assembly. The mounting plate is slidably connected to the frame and connected to the drive end of the drive assembly. The surface of the mounting plate has grooves corresponding to the multiple sets of clamping plates. Each set of grooves has a lead screw rotatably connected to its inner wall. The multiple sets of clamping plates are threaded to the corresponding lead screw surfaces. Rotating the multiple sets of lead screws causes the clamping plates to move along the grooves, so that the multiple sets of clamping plates clamp the edges of the irregular piece. The drive assembly drives the mounting plate to approach the workpiece clamping mechanism to align the workpiece and the irregular piece. The irregular piece clamping mechanism is equipped with a pressing component, which presses the irregular piece against the surface of the workpiece.
2. The profiled sheet welding fixture according to claim 1, characterized in that: The frame is fixedly connected to a mounting base and a fixture base. The workpiece clamping mechanism is mounted on the fixture base, and the irregular piece clamping mechanism is mounted on the mounting base.
3. The profiled sheet welding fixture according to claim 2, characterized in that: The clamping plates are provided in four sets, and the four sets of clamping plates are set in four directions pointing in a "+" shape with the center point of the mounting plate as the reference.
4. The profiled sheet welding fixture according to claim 2, characterized in that: The drive assembly includes a first drive member, a slide rail, and a slider. The slide rail is fixedly connected to the surface of the mounting base, the slider is slidably connected to the surface of the slide rail, and the mounting plate is connected to the surface of the slider and fixedly connected to the drive end of the first drive member.
5. The profiled sheet welding fixture according to claim 4, characterized in that: The pressing assembly includes a second driving member and an extrusion plate. A base is connected to the side surface of the mounting plate away from the workpiece clamping mechanism. The second driving member is connected to the base. A placement groove is opened on the side surface of the mounting plate near the workpiece clamping mechanism. The extrusion plate is placed in the placement groove. The driving end of the second driving member extends into the placement groove and is fixedly connected to the extrusion plate.
6. The profiled sheet welding fixture according to claim 5, characterized in that: Both the first driving component and the second driving component are cylinders.
7. The profiled sheet welding fixture according to claim 2, characterized in that: The workpiece clamping mechanism includes a limiting block, a limiting pin, and a fastening nut. The surface of the fixture base is provided with a through sliding groove. Two sets of limiting blocks are provided, and the two sets of limiting blocks are slidably connected to the sliding groove near both ends. The limiting pins are provided on both sides of the end of the sliding groove. The limiting pins extend into the sliding groove and are respectively connected to the two sets of limiting blocks. Bolts are connected to the lower surface of both sets of limiting blocks. The bolts extend outside the sliding groove. The fastening nut is provided corresponding to the bolt and is threadedly connected to the surface of the bolt.