A multi-station cold extrusion molding method for a ratchet handle

Abstract

The invention relates to a multi-position cold extrusion forming method of a ratchet handle, which belongs to the technical field of ratchet handles, and is characterized by comprising the multi-position cold extrusion processing steps that: one end of a blank is cold extruded into a spherical head through a mould; through cold extrusion, the spherical head is pressed to be flat and a positioninghole is pressed; through cold extrusion, lead holes of an upper end surface and a lower end surface are extruded; through cold extrusion, the outer diameter of the pressed spherical head is enlarged,and the lead holes of the upper end surface and the lower end surface are deepened and enlarged; waste materials in the middle of the lead holes are further pressed to be thinner through cold extrusion, the lead holes are further deepened and enlarged, and the outer diameter of the pressed spherical head is further enlarged; the waste materials in the middle of the lead holes are punched out through cold extrusion, so that the lead holes become counterbores; through cold extrusion, installation positioning holes are extruded, so that the counter bores are enlarged and formed into inner gear holes for processing inner gears; and through cold extrusion, the inner gears which are meshed with ratchets are extruded. The multi-position cold extrusion forming method of the ratchet handle is adopted for processing the ratchet handle, and the blank does not need to be heated, so that energy, power and water are saved, few materials are consumed, and the environment is not polluted.

Description

technical field [0001] The invention belongs to the technical field of ratchet handles, and in particular relates to a multi-station cold extrusion forming method of ratchet handles. Background technique [0002] Existing ratchet handles, such as the ratchet handles used on socket wrenches, all adopt a multi-station high-frequency heating and hot-pressing molding process. Ball head; the second is the high-frequency heating of the material ball head for secondary hot pressing, flattening the ball head, and pressing out the positioning hole; the third is the high-frequency heating and hot pressing of the material ball head to form the lead hole; the fourth is the high-frequency heating of the material ball head Heating, hot punching, flushing away the waste in the middle of the two end faces; the fifth is the high-frequency heating of the ball head of the material, punching the teeth, and cutting the burrs on the two end faces after punching the teeth; the sixth is grinding th...

AI Technical Summary

Problems solved by technology

Most of the above-mentioned processing methods require high-frequency heating. High-frequency heating consumes a lot of energy, electricity, cooling water, that is, tap water, and pollutes the environment. Workers need to work in a high-frequency heating environment. Heat radiation, and it is subject to high-frequency radiation; in addition, between the upper and lower stations, the material needs to have cooling time, so the processing efficiency is low; after the material is heated by high frequency, the surface layer is oxidized, and because the two The waste in the middle of the end hole is processed by hot pressing, and hot processing requires a large margin for processing, so the thick waste in the middle of the two end holes is washed away, because the above two reasons require a large amount of consumables

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