Bevel positioning lathe fixture for precision forging bevel gear

[0014] Hereinafter, the present invention will be further explained based on the drawings.

[0015] figure 1 The precision forging bevel gear and bevel gear positioning car fixture shown includes two parts: a positioning structure and a clamping structure. The positioning structure includes a connecting plate 1, a positioning plate 8, a tooth mold 11 and a bolt 9. The clamping structure includes a pull claw seat 2, a pull rod 3, a tension spring 4, a pin 5, a tension spring 6, a shaft pin 7, a pull claw 10 and a screw 12. The left end surface of the connecting plate 1 is connected with the main shaft of the lathe, and the connecting plate 1 has a built-in clamping structure, wherein the claw seat 2 is in clearance fit with the connecting plate 1, and a tension spring 4 is arranged between the parallel end surfaces, and the pull rod 3 is from right to left The pull claw seat 2, the tension spring 4 and the connecting plate 1 are sequentially connected in series, and the joint part of the pull rod 3 and the right end surface of the pull claw seat 2 is a spherical surface. In this embodiment, the radial end of the pull pawl seat 2 is evenly distributed with three open grooves, and the pawl 10 is hinged by the shaft pin 7. A pin 5 is provided inside the pull pawl seat 2 near the open groove, and both ends of the tension spring 6 are respectively pulled Pull the left end of the claw 10 and the pin 5. The right end of the connecting plate 1 and the left end of the positioning plate 8 are coaxially sleeved and connected by bolts 9. The tooth surface of the tooth mold 11 faces right, and the left end of the stop is matched with the inner hole of the positioning plate 8 and connected by screws 12. In this embodiment, the size of the tooth structure of the tooth mold 11 is the same as that of the bevel gear to be processed, and the tooth is composed of three spaced tooth blocks. On the outer side of the tooth block, a radial opening groove for installing the pull claw 10 is provided. The bevel gear to be processed is inserted from the right port of the positioning plate 8 and positioned with the bevel teeth and the gear mold 11, and the pull rod 3 is pulled to the left, so that the pawl holder 2 is moved to the left to drive the pawl 10 to compress the back of the bevel gear to be processed. Under this condition, the finishing shaft hole, journal and end face are barrier-free. The unloading operation only relaxes the pull rod 3, the pull claw base 2 moves to the right under the action of the tension spring 4, and the right end of the pull claw 10 moves to the right with the pull claw base 2 to open, and the loose bevel gear is taken out easy.