Production line of cold machining for plug screws and machining process thereof

Abstract

The invention discloses a production line of cold machining for plug screws. The production line comprises a sawing machine (14), a pre-hole machining device (15), an inner hexagon punching device (16), and a turning machine (17), which are all disposed in order from left to right. The pre-hole machining device (15) is composed of a base A (18), a concave die A (19), a hydraulic cylinder A (20), a motor (21), and a drill (22). The hydraulic cylinder A (20) disposed vertically is fixedly mounted on the base A (18). An acting end of the piston rod of the hydraulic cylinder A (20) is connected to the motor (21). The motor (21) is disposed vertically, and an output end of the motor (21) is connected to the drill (22). The concave die A (19) is located below the drill (22), and a grove (23) is formed in the top of the concave die A (19). The production line of cold machining for plug screws has the advantages of fast response time, realized production of small-batch plug screws, easy operation, high inner hexagon machining precision, reduction of the labor intensity of a worker, and improvement of the machining efficiency.

Description

technical field [0001] The invention relates to the technical field of screw plug processing, in particular to a production line of cold-processed screw plugs and a processing technology thereof. Background technique [0002] Common screw plugs on the market are usually composed of a plug body and external threads arranged on the outer surface of the plug body. The screw plug utilizes the tightness of the threaded connection to prevent liquid leakage. One end of the plug body is chamfered with a The tapered surface is used to match the chamfered surface in the hole of the object, and the head of the screw plug body is also provided with an inner hexagon, and the screw plug can be screwed in or out of the machine seat by turning the inner hexagon. At present, the processing technology of the screw plug is as follows: first use a sawing machine to divide the cylindrical rod-shaped workpiece into several blanks, then use a punch with a cross-section of a hexagonal prism to punc...

AI Technical Summary

Problems solved by technology

Because the punch directly hits the blank, it will generate a large vibration, which will cause the blank to be bent and deformed due to uneven force, which will affect the product quality. In addition, the punch is also prone to fatigue damage

[0003] The center point needs to be manually drawn, and the positions drawn each time are not exactly the same, resulting in a deviation between the axis of the inner hexagon and the axis of the blank, which has the defect of low machining accuracy, and also increases the labor intensity of the workers. In addition, when When the punch moves upward, the entire blank moves upward together with the punch, that is, the blank is attached to the punch, making it difficult to remove the workpiece, which further increases the labor intensity of the workers

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