Material holding device for cold heading machine

Abstract

The invention relates to a material clamping device applied to a cold heading machine. The device comprises a mounting plate, the mounting plate is sequentially provided with a plurality of pincer-clamp mechanisms in the material transferring direction, and each pincer-clamp mechanism comprises a swing rod, an active pincer arm and a slave pincer arm; the swing rods are rotatably arranged on the mounting plate in the direction perpendicular to the material transferring direction, the active pincer arms and the slave pincer arms are each in a turn arm shape and are distributed in a crossed mode, and the two sides of the relative turning positions of the active pincer arms and the slave pincer arms are clamping sections and linkage sections correspondingly; the linkage section of each active pincer arm is mounted on the swing rod of the same pincer-clamp mechanism, linkage pieces are arranged between the turning positions of the active pincer arms and the slave pincer arms in a penetrating mode, and the linkage pieces are rotatably matched with the slave pincer arms and can relatively move along the active pincer arms; and the linkage sections of the slave pincer arms are rotatably arranged on the peripheries of the swing rods of the adjacent pincer-clamp mechanisms. By adoption of the scheme, the material clamping device applied to the cold heading machine is compact in structure and stable in clamping.

Description

technical field [0001] The invention relates to a cold heading machine, in particular to a material clamping device applied to the cold heading machine. Background technique [0002] Cold heading machine is a forging forming equipment that thickens the top of bar or wire at room temperature. It is a special equipment mainly used for mass production of fasteners such as nuts and bolts. The cold heading machine adopts the method of cold heading to upset the heads of bolts and screws, which can minimize the cutting work and directly form them into the required shape and size, which can not only save a lot of materials, but also greatly improve production efficiency and significantly improve the upsetting process. Mechanical strength of the part. [0003] The processing steps of the cold heading machine generally include feeding, cutting, forming and discharging. The traditional forming steps include the use of clamping devices to transfer materials between the molds, and the f...

AI Technical Summary

Problems solved by technology

[0004] Since the active tong arm and the driven tong arm are oscillatingly arranged at different positions at the same height of the mounting plate and installed side by side, the width of the mounting plate is too wide, resulting in a waste of internal space in the cold heading machine. On the other hand, the clamping of the driven tong arm The holding force is transmitted by the active tong arm from the transmission part or transmission structure, and there will be losses during the transmission process, which will lead to uneven clamping force between the driven tong arm and the active tong arm, and the material clamping position will shift or unstable clamping condition

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