Welding fixture positioning mechanism

Abstract

The invention relates to the technical field of welding fixture equipment, in particular to a welding fixture positioning mechanism which comprises a fixed base, a mounting seat and a supporting block are fixed to the two sides of the fixed base respectively, an air cylinder is mounted on the mounting seat, a clamping mechanism is mounted on the supporting block, and one end of the clamping mechanism is connected with a shaft rod of the air cylinder; the clamping mechanism is driven by the air cylinder to conduct clamping, the positioning mechanism is installed at the other end of the clamping mechanism, the positioning mechanism positions a clamped part, one side of the supporting block is fixedly connected with the opening limiting block, and the opening limiting block is matched with a part opening. The clamping mechanism is driven by the air cylinder to be matched with the opening limiting block to clamp a workpiece, the opening of the workpiece is placed corresponding to the opening limiting block, the positioning mechanism carries out positioning along with clamping of the clamping mechanism, the positioning and clamping accuracy is guaranteed, the space size of the clamp is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of welding fixture equipment, and particularly to a welding fixture positioning mechanism. Background Art

[0002] A welding tooling fixture is a process equipment that accurately positions and stably clamps welding workpieces, facilitating the assembly and welding of the workpieces and ensuring the accuracy requirements of the welding structure.

[0003] Products on the welding fixture often require simultaneous guarantee of the coaxiality, parallelism of two hole positions on the product, and the opening size of the relative position, which often results in the need to design multiple individually positioned and clamped structures driven by cylinders on the welding fixture, leading to insufficient fixture structure space and the need to operate the corresponding positioning and clamping mechanisms one by one, with relatively complex operations; the use of multiple individual structures also increases the production cost. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a welding fixture positioning mechanism to solve the problems of insufficient space and cumbersome operation caused by the need to use multiple mechanisms for positioning and clamping.

[0005] Based on the above purpose, the present invention provides a welding fixture positioning mechanism, including a fixed base, on both sides of which there are respectively fixed an installation seat and a support block. A cylinder is installed on the installation seat, and a clamping mechanism is installed on the support block. One end of the clamping mechanism is connected to the shaft rod of the cylinder, and the clamping mechanism is driven by the cylinder to perform clamping. The other end of the clamping mechanism is installed with a positioning mechanism, which positions the clamped part. One side of the support block is fixedly connected with an opening limit block, and the opening limit block is adapted to the part opening.

[0006] Further improvement lies in that the clamping mechanism includes a linkage block rotatably connected to the end of the shaft rod of the cylinder. There are two groups of linkage blocks, and the other ends of the linkage blocks are both rotatably connected to a clamping connection block. A rotating seat is installed on the top of the support block, and the middle parts of the opposite sides of the two clamping connection blocks are rotatably connected to the side of the rotating seat. The lower side of the other end of the clamping connection block is fixedly connected with a clamping block.

[0007] Further improvement lies in that a clamping limit block is fixedly connected to the end of the clamping connection block away from the linkage block, and a clamping limit seat is installed on the support block, and the clamping limit block is adapted to the clamping limit seat.

[0008] Further improvement lies in that the positioning mechanism includes a positioning pin fixedly installed on one side of the clamping block. Avoidance holes are provided on the opening limit block corresponding to the positioning pins, and the avoidance holes on both sides penetrate through the opening limit block and communicate with each other.

[0009] Further improvement lies in that the end of the positioning pin is a spherical structure.

[0010] A further improvement lies in that a limiting mechanism is installed on the opening limiting block. The limiting mechanism includes a positioning plate. An installation groove is formed on the lower side of the opening limiting plate, and one side of the installation groove communicates with the avoidance hole. The positioning plate is rotatably installed in the installation groove through a rotating shaft, and a positioning block is installed on one side of the opening limiting block.

[0011] A further improvement lies in that the positioning plate is L-shaped, and both sides of the short side of the positioning plate are arc-shaped structures.

[0012] A further improvement lies in that a manual handle is rotatably installed on one side of the cylinder.

[0013] The beneficial effects of the present invention: By setting a cylinder to drive the clamping mechanism to cooperate with the opening limiting block to clamp the workpiece, the workpiece opening is placed corresponding to the opening limiting block. The cylinder extends and retracts to drive the clamping connection block to rotate on the rotating seat through the linkage block, driving the clamping block to clamp the workpiece, so that the workpiece fits on the opening limiting block. By setting a positioning mechanism to position the clamping position, the positioning pin passes through the hole on the workpiece and inserts into the avoidance hole, and the avoidance holes on both sides penetrate the opening limiting hole, ensuring the coaxial positioning of the holes on both sides of the workpiece, and ensuring the parallelism and coaxiality of the relative positions of the holes on both sides of the workpiece; Using one cylinder to extend and retract to clamp both ends of the workpiece at the same time and position the hole positions effectively saves the fixture space, reduces the use of the equipment mechanism, reduces the production cost, also reduces the operation steps, and improves the convenience of use.

[0014] By setting a limiting mechanism to support and limit the workpiece, the positioning plate rotates as the positioning pin inserts into the avoidance hole. The positioning pin contacts the positioning plate and pushes the positioning plate to rotate. The positioning plate rotates and contacts the workpiece. The positioning plate and the positioning block cooperate to support and clamp the workpiece from the upper and lower sides, thereby further ensuring the stability of the workpiece clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall top view structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the clamping mechanism of an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the limiting mechanism of an embodiment of the present invention.

[0017] The markings in the figure are as follows: 1. Fixed base; 2. Mounting seat; 3. Support block; 4. Cylinder; 5. Opening limit block; 6. Linking block; 7. Clamping connection block; 8. Rotating seat; 9. Clamping block; 10. Clamping limit block; 11. Clamping limit seat; 12. Positioning pin; 13. Avoidance hole; 14. Positioning plate; 15. Mounting groove; 16. Positioning block; 17. Manual handle. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connection" or "coupling" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object to be described changes, the relative positional relationship may also change accordingly.

[0020] As Figure 1 、 2 shown, a positioning mechanism for a welding fixture includes a fixed base 1, the fixed base 1 is arranged on the welding fixture, mounting seats 2 and support blocks 3 are respectively fixed on both sides of the fixed base 1, an opening limit block 5 is fixedly connected to one side of the support block 3, the opening limit block 5 is adapted to the opening of the part, and the workpiece is clamped on the opening limit block 5 through the opening. A cylinder 4 is installed on the mounting seat 2, a clamping mechanism is installed on the support block 3, one end of the clamping mechanism is connected to the shaft rod of the cylinder 4, and the cylinder 4 drives the clamping mechanism to cooperate with the opening limit block 5 to clamp the workpiece. A manual handle 17 is rotatably installed on one side of the cylinder 4, and one side of the middle part of the manual handle 17 is hinged to the other end of the shaft rod of the cylinder 4. The shaft rod of the cylinder 4 is manually pushed by the manual handle 17 to drive the clamping mechanism to perform preliminary positioning and clamping, and further fixed clamping is performed by ventilating the air circuit of the cylinder 4 to ensure the accuracy and stability of the clamping.

[0021] As Figure 3As shown in the figure, the clamping mechanism includes a linkage block 6 rotatably connected to the end of the shaft rod of the cylinder 4. There are two groups of linkage blocks 6. The other end of each linkage block 6 is rotatably connected to a clamping connection block 7. A rotating seat 8 is installed on the top of the support block 3. The middle parts of the opposite sides of the two clamping connection blocks 7 are rotatably connected to the side of the rotating seat 8. The lower sides of the other ends of the clamping connection blocks 7 are fixedly connected with clamping blocks 9. The cylinder 4 drives the linkage block 6 to move, driving the clamping connection block 7 to rotate around the connection point with the rotating seat 8, so that the clamping block 9 at the end of the clamping connection block 7 rotates to clamp the workpiece.

[0022] A clamping limit block 10 is fixedly connected to the end of the clamping connection block 7 far from the linkage block 6. A clamping limit seat 11 is installed on the support block 3. The clamping limit block 10 is adapted to the clamping limit seat 11; the clamping limit block 10 moves as the clamping connection block 7 rotates, and the clamping limit block 10 fits with the clamping limit seat 11 to limit the rotation of the clamping connection block 7, ensuring that the workpiece is not deformed due to excessive clamping while maintaining stable clamping.

[0023] A positioning mechanism is installed at the other end of the clamping mechanism. The positioning mechanism positions the clamped part. The positioning mechanism includes a positioning pin 12 fixedly installed on one side of the clamping block 9. Avoidance holes 13 are provided on both sides of the opening limit block 5 corresponding to the positioning pin 12. The two avoidance holes 13 are on the same horizontal line. The two avoidance holes 13 penetrate through the opening limit block 5 and are connected. By inserting the positioning pin 12 into the workpiece hole and the avoidance hole 13 in sequence, the relative position accuracy of the hole positions on both sides of the workpiece is ensured, and the coaxiality and parallelism of the hole positions are ensured.

[0024] As Figure 4 shown, a limiting mechanism is installed on the opening limit block 5. The limiting mechanism includes a positioning plate 14. An installation groove 15 is provided on the lower side of the opening limit plate. One side of the installation groove 15 is connected to the avoidance hole 13. The positioning plate 14 is rotatably installed in the installation groove 15 through a rotating shaft. A positioning block 16 is installed on one side of the opening limit block 5. The positioning plate 14 is L-shaped. The two sides of the short side of the positioning plate 14 are arc-shaped structures. The end of the positioning pin 12 is a spherical structure, which is convenient for the two to contact; by inserting the positioning pin 12 into the avoidance hole 13 and contacting the positioning plate 14, the positioning plate 14 is pressed down to rotate. The positioning plate 14 rotates to contact the workpiece, supports the workpiece from the bottom, and cooperates with the positioning block 16 for clamping, so that the workpiece fits on the positioning block 16, further improving the stability of workpiece clamping and positioning, and preventing the workpiece from rotating downward along the positioning pin 12 due to gravity.

[0025] A manual handle 17 is rotatably installed on one side of the cylinder 4. One side of the middle part of the manual handle 17 is hinged to one end of the shaft rod of the cylinder 4. The shaft rod of the cylinder 4 is manually pushed by the manual handle 17 for preliminary positioning and clamping, and then further fixed clamping is carried out through the air passage of the cylinder 4, ensuring the accuracy and stability of clamping.

[0026] During assembly, the workpiece is fitted onto the opening limit block 5. The flanges at both ends of the workpiece are in contact with the opening limit block 5, and the hole positions of the workpiece are aligned with the avoidance holes 13. Pull the manual handle 17 to rotate the linkage block 6, the clamping connection block 7, and the clamping block 9 in sequence. The clamping block 9 fits onto the flanges at both ends of the workpiece. The positioning pins 12 are inserted into the workpiece holes and the avoidance holes 13 in sequence as the clamping block 9 fits, for preliminary positioning and clamping. As the positioning pins 12 are inserted into the avoidance holes 13, the positioning pins 12 contact the positioning plate 14. The positioning pins 12 press down one end of the positioning plate 14, and the positioning plate 14 rotates to make the other end tilt up. The tilted-up end of the positioning plate 14 fits onto one side of the workpiece to support the workpiece from the bottom and cooperate with the positioning block 16 to clamp the workpiece obliquely, ensuring the stability of clamping the workpiece. Finally, the air cylinder 4 is ventilated to make the clamping connection blocks 7 and the clamping blocks 9 on both sides be evenly stressed. After the workpiece is kept in a stable clamping state, welding is started. After welding is completed, open the fixture air circuit, and the air cylinder 4 deflates and resets to open the clamping connection blocks 7 and the clamping blocks 9 outward, releasing the positioning and clamping of the workpiece, and the workpiece is in a detachable state.

[0027] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding fixture positioning mechanism, comprising a fixed base (1), characterized in that, On both sides of the fixed base (1), a mounting seat (2) and a support block (3) are respectively fixed. A cylinder (4) is mounted on the mounting seat (2), and a clamping mechanism is mounted on the support block (3). One end of the clamping mechanism is connected to the shaft rod of the cylinder (4). The clamping mechanism is driven by the cylinder (4) to clamp. The other end of the clamping mechanism is mounted with a positioning mechanism, which positions the clamped part. One side of the support block (3) is fixedly connected with an open limiting block (5), and the open limiting block (5) is adapted to the opening of the part.

2. The positioning mechanism of a welding fixture according to claim 1, characterized in that, The clamping mechanism includes a linkage block (6) rotatably connected to the end of the shaft rod of the cylinder (4). There are two groups of linkage blocks (6). The other ends of the linkage blocks (6) are both rotatably connected with clamping connection blocks (7). A rotating seat (8) is mounted on the top of the support block (3). The middle parts of the opposite sides of the two clamping connection blocks (7) are rotatably connected to the side of the rotating seat (8). The lower side of the other end of the clamping connection block (7) is fixedly connected with a clamping block (9).

3. The positioning mechanism of a welding fixture according to claim 2, characterized in that, One end of the clamping connection block (7) far from the linkage block (6) is fixedly connected with a clamping limiting block (10). A clamping limiting seat (11) is mounted on the support block (3), and the clamping limiting block (10) is adapted to the clamping limiting seat (11).

4. The positioning mechanism of a welding fixture according to claim 2, wherein, The positioning mechanism includes a positioning pin (12) fixedly installed on one side of the clamping block (9). Avoidance holes (13) are provided on both sides of the open limiting block (5) corresponding to the positioning pin (12), and the two avoidance holes (13) penetrate through the open limiting block (5) and communicate.

5. The positioning mechanism of a welding fixture according to claim 4, wherein The end of the positioning pin (12) is a spherical structure.

6. The positioning mechanism of a welding fixture according to claim 1, characterized in that, A limiting mechanism is mounted on the open limiting block (5). The limiting mechanism includes a positioning plate (14). An installation groove (15) is provided on the lower side of the open limiting plate. One side of the installation groove (15) communicates with the avoidance hole (13). The positioning plate (14) is rotatably installed in the installation groove (15) through a rotating shaft. A positioning block (16) is mounted on one side of the open limiting block (5).

7. A welding fixture positioning mechanism according to claim 6, characterized in that, The positioning plate (14) is L-shaped, and the two sides of the short side of the positioning plate (14) are arc-shaped structures.

8. A welding fixture positioning mechanism according to claim 1, characterized in that, A manual handle (17) is rotatably installed on one side of the cylinder (4).

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