Clamping structure for circuit board welding

[0017] Example 1

[0018] Such as figure 1 As shown, this embodiment includes a welding frame 1 and a hydraulic cylinder 2 fixed on the side wall of the welding frame 1. A baffle 6, a support rod 4, and a cylinder 9 are fixed on the welding frame 1. The output end of the hydraulic cylinder 2 is The movable block 3 is hinged, and the top end of the support rod 4 is hinged to the bottom surface of the movable block 3. A chuck 5 facing the baffle 6 is fixed on the side wall of the movable block 3, and the output end of the cylinder 9 A top plate 8 is fixed on the top plate, the baffle 6 is L-shaped, and the vertical part of the baffle 6 is fixed on the welding frame 1, the horizontal part of the baffle 6 is facing the chuck 5, and the baffle 6 is On the side wall of the vertical part of 6 close to the chuck 5, a rectangular groove 7 with an open end is opened, and a plurality of rollers 10 parallel to the top plate 8 are rotatably arranged in the rectangular groove 7. The side end is aligned with the outer wall of the roller 10 in the vertical direction; it also includes an elastic rubber pad 11 installed on the upper surface of the top plate 8.

[0019] When in use, place the circuit board to be welded on the top plate 8, start the cylinder 9 until the top plate 8 and the circuit board rise to a suitable welding station, and at the same time the output end of the hydraulic cylinder 2 moves up, so that the movable block 3 is connected to the support rod 4 The hinge point of the movable block 3 begins to rotate and move until the chuck 5 moves to the end of the circuit board to contact, and then the circuit board is fixed in the clamping area formed between the chuck 5 and the baffle 6, so as to facilitate the operator to check The circuit board performs the component welding process; the movable block 3 is respectively hinged with the top of the support rod 4 and the output end of the hydraulic cylinder 2, so that the chuck 5 can rotate along an arc track within a certain range, which is convenient for the circuit board to finish the welding process Afterwards, the chuck 5 is quickly separated from the circuit board to release the fixing of the circuit board and facilitate the next circuit board welding process. And in the entire welding process of the circuit board, the lifting and fastening of the circuit board is realized by controlling the cylinder 9 and the hydraulic cylinder 2, which eliminates the need for the traditional manual method of fixing the circuit board by bolts. The work intensity of the operator is reduced, and the U-shaped clamping area formed by the chuck 5, the top plate 8 and the baffle 6 can prevent the circuit board from moving during welding, thereby improving the welding accuracy of the circuit board components.

[0020] When debugging the circuit board station before welding, it is achieved by moving the output end of the cylinder 9 up and down. However, during the up and down movement, the operation of the cylinder 9 will be stuck or radially jumped from time to time, which will drive the circuit board on the top board 8. The position shift occurs on the upper part, and the baffle 6 in this embodiment is L-shaped, and a rectangular slot 7 with an open end is opened on the side wall on the side of the vertical end facing the chuck 5, so that the top plate 8 moves upward When the end of the rectangular groove 7 moves directly along the bottom of the rectangular groove 7, that is, the upward movement of the top plate 8 of the rectangular groove 7 provides a guiding effect. The end of the top plate 8 directly contacts the outer circumferential wall of the plurality of rollers 10, so that the top plate The sliding friction between the end of 8 and the bottom of the rectangular groove 7 becomes rolling friction. While ensuring the guiding effect on the top plate 8, the mutual wear between the top plate 8 and the baffle 6 is reduced, so that the top plate 8 and the upper circuit board The movement is more stable to improve the accuracy of the circuit board during welding; and, the elastic rubber pad 11 installed on the upper surface of the top plate 8 can cushion the radial runout and position shift caused by the movement of the cylinder 9 to a certain extent, ensuring welding When the circuit board is in stable working condition.

[0021] Preferably, the movable block 3 allows the chuck 5 to rotate along an arc-shaped track within a certain range, that is, the clamping surface of the chuck 5 is in an inclined state when it is rotated to be directly opposite to the baffle 6, thereby causing the clamping of the chuck 5 The contact area of ​​the holding surface and the end of the circuit board is reduced, which is not conducive to the fixing of the circuit board. In this embodiment, the holding surface of the chuck 5 is inclined to the north direction along the horizontal line, so that the chuck 5 is rotated to When it is directly opposite to the baffle 6, the contact area between the clamping surface and the end of the circuit board is ensured, that is, the clamping effect on the circuit board is improved.