A production process of oil pipe joint lock sleeve

Abstract

The invention relates to a lock sleeve of an oil pipe joint, discloses a production process of the lock sleeve of an oil pipe joint, which solves the problems of high defective rate and poor production efficiency in the existing process, which includes discharging, primary straightening, and secondary straightening in sequence. Straightening, cold heading processing, surface processing, thread processing, cleaning and electroplating steps; in the cold heading processing step, the piercing hole is first extruded against the part at the screwing end as a positioning hole, which is convenient for the shape of the oil pipe joint lock sleeve Extrusion molding; then upsetting the deep pipe hole without penetrating the pipe hole, and then extruding the abutment groove to ensure that when the abutment groove is formed, the guide section has sufficient bearing pressure to avoid upsetting or upsetting, and at the same time The pressing groove has experienced three processes of extrusion deformation, pushing out of the punch rod and elastic retraction of the abutting groove during extrusion molding. There is a mapping relationship between the taper angles, which facilitates accurate adjustment of the taper angles of the contact grooves, and improves product precision and production efficiency.

Description

Technical field[0001]The present invention relates to a tubing joint lock sleeve, and more particularly to a production process of a tubing joint lock sleeve.Background technique[0002]AppendFigure 10 As shown, a tubing joint locking sleeve 1 is configured to connect the tubing 2 and the tubing hole 3, which comprises a swirling section 11, a thread section 12, and a guide section 13 disposed in the axial direction, and a locking screw jacket A penetrating pipe hole 14 is also available along the axis. The spindle section 11, the thread segment 12 and the guide section 13 are coaxial with the tube hole 14, and the slot section 11 is a positive hexagonal shape, the threaded segment 12 is a cylindrical shape and an outer thread is provided on the outside. The end surface of the back to the end of the slot section is provided with a rounded abutment groove 131. The abutting groove 131 is expanded outward, and the groove bottom is connected to the tube hole 14 and the groove bottom diame...

AI Technical Summary

Problems solved by technology

However, due to the large ratio of the axial length and diameter of the oil pipe joint lock sleeve 1, the stamping force is large and difficult to adjust. At the same time, there is a certain difference in the internal stress of each workpiece, resulting in the same stamping force. There is a deviation in the corner angle, and further dissimilation of the internal stress difference after stamping

When punching the pipe hole 14, the inside of the semi-finished product is extruded outward. Due to the large difference in internal stress, the amount of extrusion deformation in the guide section 13 is different, so that the abutment groove 131 on the oil pipe joint lock sleeve 1 is finally obtained. The cone angle is difficult to control, and another method of upsetting the pipe hole 14 first and then upsetting the abutment groove 131, after the pipe hole 14 is formed, the compressive strength of the guide section 13 decreases, and then the guide section 13 or the abutment groove 131 Upset Upset Upset

Therefore, the oil pipe joint lock sleeve produced by the existing process has a high rate of defective products and poor production efficiency, which needs to be improved.

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