Stable welding fixture

Abstract

The utility model relates to the technical field of welding fixtures, in particular to a stable type welding fixture which comprises a rack, a first support, a second support, a third support and a fourth support. The positioning block is installed on the machine frame, a positioning groove is formed in the positioning block, and the positioning groove is used for positioning a part; the pressing plate and the positioning block are arranged in a spaced mode, the pressing plate is installed on the rack in a sliding mode, a welding hole is formed in the pressing plate, and the welding hole penetrates through the pressing plate; and the lifting assembly is installed on the machine frame, and the lifting assembly is used for driving the pressing plate to ascend and descend on the machine frame. The part is pressed on the positioning block through the pressing plate, so that deformation of the part caused by thermal expansion and cold contraction is reduced, movement or dislocation of the workpiece in the welding process is reduced, and the accuracy of the welding position of the workpiece is improved.

Description

Technical Field

[0001] This application relates to the field of welding fixture technology, and in particular to a stable welding fixture. Background Technology

[0002] Currently, welding fixtures are tools used to fix workpieces or position them during the welding process. They ensure that the workpiece maintains an accurate position and angle during welding, improving welding precision, efficiency, and quality. They are widely used in machinery manufacturing, automotive, and aerospace industries, and common types include manual fixtures, pneumatic or hydraulic fixtures, magnetic fixtures, and specialized welding fixtures.

[0003] Chinese patent CN219113315U discloses a main frame welding fixture assembly, including a base, a fixture body on the upper surface of the base, a threaded rod threadedly connected to the upper side of one side of the fixture body, an upper clamping block bearingly connected to the lower side of the threaded rod, and a limit rod on one side of the upper clamping block; a lower clamping block fixedly installed on the lower side of one side of the fixture body; a sliding groove formed on the inner wall of one side of the fixture body; and further including: a sliding rod fixedly connected to the lower side of the fixture body; a through groove formed inside the base; and a through pipe extending through the base.

[0004] In related technologies, the part is placed between the upper clamping block and the lower clamping block, and then the threaded rod is rotated. As the threaded rod rotates, the upper clamping block moves closer to the lower clamping block. After the upper clamping block clamps the part onto the lower clamping block, the screw is stopped from rotating, and then the two parts are welded together.

[0005] Regarding the aforementioned technologies, the inventors believe that during the welding process, deformation can easily occur due to thermal expansion and contraction, and the workpiece may move or be misaligned, resulting in inaccurate welding positions. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a stable welding fixture, which solves the technical problem that the workpiece may move or be misaligned due to deformation caused by thermal expansion and contraction during the welding process, resulting in inaccurate welding position.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A stable welding fixture includes: a frame for supporting the welding fixture; a positioning block mounted on the frame, the positioning block having a positioning groove for positioning a part; a pressure plate spaced apart from the positioning block and slidably mounted on the frame, the pressure plate having a welding hole penetrating through it; and a lifting assembly mounted on the frame for driving the pressure plate to move up and down on the frame.

[0009] Furthermore, the frame is provided with a lifting plate, the lifting plate is provided with an installation strip, the installation strip has a slot, and the pressure plate is inserted into the slot.

[0010] Furthermore, the lifting assembly includes a lifting cylinder, which is mounted on the frame, and the piston rod of the lifting cylinder is connected to the lifting plate.

[0011] Furthermore, a positioning rod is provided on the frame, one end of which forms a contact surface. A shock absorber is installed on the lifting plate, and a contact head is provided on the shock absorber. The contact head and the contact surface are spaced apart. A connecting rod is provided on the contact head, one end of which passes through the shock absorber. A connecting plate is provided at the end of the connecting rod that passes through the shock absorber. A shock-absorbing spring is provided between the connecting plate and the shock absorber, and the shock-absorbing spring is pressed against the connection plate and the shock absorber.

[0012] Furthermore, a fixing clamp is provided on the frame, the fixing clamp including a pressure bar, one end of the pressure bar extending toward the side close to the positioning groove.

[0013] Furthermore, the lifting plate is provided with fixing bolts, and the pressure plate is provided with positioning holes. One end of the fixing bolt passes through the lifting plate and the positioning hole in sequence.

[0014] Furthermore, a guide rod is provided on the frame, and a guide sleeve is fitted on the guide rod, with the guide sleeve installed on the lifting plate.

[0015] In summary, this application includes at least one of the following stabilizing welding clamps, which have beneficial technical effects:

[0016] 1. Place the part in the positioning slot of the positioning block, and then the lifting assembly drives the pressure plate to move towards the side closer to the positioning block. The pressure plate presses the part firmly onto the positioning block. During the welding process, the part is welded through the welding hole. The pressure plate presses the part firmly onto the positioning block, thereby reducing the deformation of the part due to thermal expansion and contraction, reducing the movement or misalignment of the workpiece during the welding process, and improving the accuracy of the workpiece welding position.

[0017] 2. The parts are fixed to the positioning block by the fixing clamps, and the pressure plate is locked to the lifting plate by the fixing bolts, which improves the stability of the parts during the welding process;

[0018] 3. The stability of the pressure plate pressing parts is improved by setting up shock-absorbing springs and lifting cylinders. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a stable welding fixture, which is the main feature of this application.

[0020] Figure 2 This is an exploded schematic diagram of the pressure plate structure mainly provided in this application;

[0021] Figure 3 This is the sectional view of the shock-absorbing cylinder structure that is the main feature of this application.

[0022] Reference numerals: 1. Frame; 11. Fixing clamp; 12. Handle; 13. Pressure rod; 14. First sensor; 15. Second sensor; 16. Guide rod; 161. Guide sleeve; 17. Positioning rod; 171. Contact surface; 2. Positioning block; 21. Positioning groove; 3. Pressure plate; 31. Welding hole; 32. Positioning hole; 33. Fixing bolt; 4. Lifting assembly; 41. Lifting plate; 411. Clearance groove; 42. Lifting cylinder; 43. Mounting strip; 431. Slot; 44. Shock absorber; 45. Contact head; 451. Connecting rod; 452. Connecting plate; 46. Shock absorber spring. Detailed Implementation

[0023] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0025] This application discloses a stable welding fixture.

[0026] Reference Figure 1 A stable welding fixture includes a frame 1, on which a positioning block 2 is provided. The positioning block 2 has a positioning groove 21, which positions the part. A pressure plate 3 and a lifting assembly 4 are provided on the frame 1. The lifting assembly 4 is mounted on the frame 1 and drives the pressure plate 3 to slide towards or away from the positioning block 2, pressing the part firmly onto the positioning block 2.

[0027] Reference Figure 1The positioning block 2 is installed on the frame 1. A fixing clamp 11 is provided on the side of the frame 1 near the positioning block 2. The fixing clamp 11 includes a handle 12 and a pressure rod 13. One end of the pressure rod 13 extends into the positioning groove 21 on the positioning block 2. When the part is placed in the positioning groove 21 of the positioning block 2, the pressure rod 13 is pulled to press one end of the pressure rod 13 against the part, thereby preventing the part from falling off the positioning block 2.

[0028] A first sensor 14 and a second sensor 15 are installed on the frame 1, located on either side of the positioning block 2. During operation, the first sensor 14 emits a laser beam, and the second sensor 15 receives it. When the workpiece is not placed on the positioning block 2, the laser beam emitted by the first sensor 14 is received by the second sensor 15, and the welding machine will not start working. When the workpiece is placed on the positioning block 2, the laser beam emitted by the first sensor 14 is blocked by the workpiece, and the welding machine will then weld the workpiece according to a predetermined trajectory.

[0029] Reference Figure 2 The frame 1 is provided with a lifting plate 41, which is generally rectangular. The lifting assembly 4 includes a lifting cylinder 42. There is one lifting cylinder 42 on each side of the lifting plate 41 along its length. The lifting cylinder 42 is vertically arranged and is mounted on the frame 1. The piston rod of the lifting cylinder 42 is connected to the lifting plate 41. In use, the lifting plate 41 is driven to rise and fall by the lifting cylinder 42.

[0030] The lifting plate 41 has a clearance groove 411, which has a rectangular cross-section and is open on one side along its length. Mounting strips 43 are provided on both sides of the clearance groove 411 along its width. Slots 43 are provided on the mounting strips 43, and in use, the pressure plate 3 is inserted into the slots 431 of the mounting strips 43. Furthermore, the pressure plate 3 has welding holes 31 that penetrate through it. In use, the pressure plate 3 presses the part firmly onto the positioning block 2, and the welding equipment welds the part through the welding holes 31 on the pressure plate 3.

[0031] Reference Figure 2 To improve the stability of the pressure plate 3 on the lifting plate 41, a positioning hole 32 is provided on the pressure plate 3, and a fixing bolt 33 is provided on the lifting plate 41. The fixing bolt 33 is threadedly connected to the lifting plate 41, and one end of the fixing bolt 33 passes through the lifting plate 41 and the other end of the fixing bolt 33 passes through the lifting plate 41 and enters the positioning hole 32. In use, the positioning plate is positioned by the fixing bolt 33, which greatly improves the stability of the pressure plate 3 after pressing the workpiece.

[0032] Guide rods 16 are provided on the frame 1, with four guide rods 16 spaced apart at each of the four corners of the lifting plate 41. The axes of the four guide rods 16 are parallel to the axis of the lifting cylinder 42. The guide rods 16 are vertically arranged, with one end connected to the frame 1 and the other end passing through the lifting plate 41. In addition, guide sleeves 161 are fitted on each of the four guide rods 16, and all four guide sleeves 161 are installed on the lifting plate 41. In use, the lifting plate 41 slides along the axis of the guide rods 16 under the drive of the lifting cylinder 42.

[0033] Reference Figures 2-3 When the pressure plate 3 presses the workpiece, in order to reduce damage to the workpiece caused by the pressure plate 3, a positioning rod 17 is provided on the frame 1. One positioning rod 17 is located on each side of the lifting plate 41 along its length. One end of each positioning rod 17 is connected to the frame 1, and the other end extends towards the side closer to the lifting plate 41. A contact surface 171 is formed on the side of the positioning rod 17 closest to the lifting plate 41, and the contact surface 171 is parallel and spaced apart from the lifting plate 41. In use, the length of the positioning rod 17 is selected according to the installation height of the positioning block 2 on the frame 1.

[0034] Reference Figure 3 A shock absorber 44 is provided on the lifting plate 41, corresponding to the positioning rod 17. A contact head 45 is provided on the side of the shock absorber 44 closest to the positioning rod 17, and a connecting rod 451 is provided on the contact head 45. One end of the connecting rod 451 is connected to the contact head 45, and the other end passes into the shock absorber 44. A connecting plate 452 is provided at the end of the connecting rod 451 that passes into the shock absorber 44. A shock-absorbing spring 46 is provided between the side of the connecting plate 452 away from the connecting rod 451 and the shock absorber 44, and the shock-absorbing spring 46 abuts against the connecting plate 452 and the shock absorber 44. When the lifting plate 41 moves closer to the positioning block 2, the contact head 45 contacts the contact surface 171 on the positioning rod 17, at which time the shock-absorbing spring 46 is compressed. Through the damping of the shock-absorbing spring 46, the impact force of the pressure plate 3 pressing against the workpiece can be reduced.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stable welding fixture, characterized in that, include: A frame (1) is used to support a welding fixture; Positioning block (2), the positioning block (2) is installed on the frame (1), the positioning block (2) is provided with a positioning groove (21), the positioning groove (21) is used to position the part; Pressure plate (3), the pressure plate (3) and the positioning block (2) are spaced apart, and the pressure plate (3) is slidably installed on the frame (1). The pressure plate (3) has a welding hole (31) that penetrates the pressure plate (3). A lifting assembly (4) is mounted on the frame (1) and is used to drive the pressure plate (3) to move up and down on the frame (1).

2. The stable welding fixture according to claim 1, characterized in that, The frame (1) is provided with a lifting plate (41), the lifting plate (41) is provided with an installation strip (43), the installation strip (43) is provided with a slot (431), and the pressure plate (3) is inserted into the slot (431).

3. A stable welding fixture according to claim 2, characterized in that, The lifting assembly (4) includes a lifting cylinder (42), which is mounted on the frame (1), and the piston rod of the lifting cylinder (42) is connected to the lifting plate (41).

4. A stable welding fixture according to claim 3, characterized in that, A positioning rod (17) is provided on the frame (1), and a contact surface (171) is formed at one end of the positioning rod (17). A shock absorber (44) is installed on the lifting plate (41), and a contact head (45) is provided on the shock absorber (44). The contact head (45) and the contact surface (171) are spaced apart. A connecting rod (451) is provided on the contact head (45). One end of the connecting rod (451) is inserted into the shock absorber (44). A connecting plate (452) is provided at the end of the connecting rod (451) that is inserted into the shock absorber (44). A shock absorber spring (46) is provided between the connecting plate (452) and the shock absorber (44). The shock absorber spring (46) is pressed against the connecting plate (452) and the shock absorber (44).

5. A stable welding fixture according to claim 1, characterized in that, A fixing clamp (11) is provided on the frame (1). The fixing clamp (11) includes a pressure bar (13), one end of which extends toward the side close to the positioning groove (21).

6. A stable welding fixture according to claim 2, characterized in that, The lifting plate (41) is provided with a fixing bolt (33), and the pressure plate (3) is provided with a positioning hole (32). One end of the fixing bolt (33) passes through the lifting plate (41) and the positioning hole (32) in sequence.

7. A stable welding fixture according to claim 6, characterized in that, A guide rod (16) is provided on the frame (1), and a guide sleeve (161) is fitted on the guide rod (16). The guide sleeve (161) is installed on the lifting plate (41).

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