Rotary-forging forming and feeding device for internal thread pipe

Abstract

The invention discloses a rotary-forging forming and feeding device for an internal thread pipe. The device comprises a feeding mechanism and a central spindle actuating mechanism, wherein a lower guide rail surface of a feeding table in the feeding mechanism is matched with an upper guide rail surface of a guide rail; the main shaft of the feeding table is axially supported by a thrust bearing; a lower guide rail surface of a central spindle feeding table in the central spindle actuating mechanism is matched with the upper guide rail surface of the guide rail; the guide rail is mounted on a device body; a workpiece and the central spindle are both axially driven by a servo motor and a ball screw nut pair and both can freely rotate in circumferential direction; the thread of an internal thread pipe is formed by the rotary forging under the self-guiding action of the thread on the central spindle; the central spindle is in threaded connection with a pull rod through a core mold, and bears axial tension in the forging process and bending and deformation can be avoided. By the adoption of the device disclosed by the invention, distortion and deformation caused by the torque effect onthe workpiece during rotary forging can be avoided, and the workpiece forming precision is improved; in addition, the device has advantages of simple structure, high control precision, good stability, strong applicability and the like, and is convenient to operate.

Description

technical field [0001] The invention belongs to the advanced technical field of material forming, and in particular relates to a feeding device for swaging forming of internally threaded pipes. Background technique [0002] Rotary forging is a process for precision forming of pipe fittings, bars, steel wire ropes and other parts. Forging hammers are evenly distributed around the parts to be processed in the circumferential direction. While rotating around the parts, the forging hammers do high-frequency, small The forging movement of the stroke makes the processed parts accumulate from small deformation to large deformation. [0003] With the rapid development of the manufacturing industry, new requirements are put forward for the manufacturing process of pipe fittings with internal thread structure, such as rifle barrels, air conditioning cooling pipes, boiler evaporation pipes, etc. At present, mechanical processing methods are usually used for pipe fittings with internal ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a feeding device for internally threaded pipe swaging, which solves the twisting deformation caused by the torque action of the forging hammer on the workpiece during swaging. At the same time, the device has The self-guiding mandrel ensures that the thread formed on the inner surface of the workpiece will not be dislocated during the swaging process, which improves the forming accuracy of the workpiece. In addition, it has the advantages of convenient operation, high control accuracy, good stability and strong applicability

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