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Valve rod forging and cold extruding formation process

A forming process and cold extrusion technology, applied in the field of forging process, can solve the problems of unguaranteed product quality, high valve stem lifting force, waste of raw materials during working hours, etc., and achieve good valve sealing effect, small opening and closing torque, and few processes Effect

Inactive Publication Date: 2007-06-27
朱志远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The valve stems of various valves in the prior art are originally designed to have 90-degree edges and corners at the root of the thread, so the seals that are easy to wear and the polished rod parts were originally processed by a lathe and then polished, and the smoothness is not good enough. , it is easy to damage the packing, and the valve stem has a strong lifting force; the thread of the original thread part is processed by a lathe, so the precision is not good, and the material is wasted
[0003] In the prior art, the valve stem is made through various cutting processes such as turning, milling, etc., so a complete valve stem can only be completed through multiple processes and multiple cuttings, resulting in waste of man-hours and raw materials. The quality of the product cannot be guaranteed

Method used

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  • Valve rod forging and cold extruding formation process

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Embodiment Construction

[0035] As shown in Figure 1 and Figure 2, the valve stem is a rod-shaped body, one end of which is a thicker head 1, trapezoidal grooves 4 are provided on the left and right sides of the head 1, and the other end of the rod-shaped body is a threaded portion 3. The center of the rod-shaped body is the polished rod part 2, the connection between the head 1 and the polished rod part 2 is a sealing surface 5 with a 45° chamfer, and the connection between the polished rod part 2 and the threaded part 3 is an arc chamfer Chamfer 6, the end of the threaded portion is a 45° chamfer 7.

[0036] Valve stem forging and cold extrusion molding process of the present invention, its specific technological process is as follows:

[0037] 1. Cut off a valve stem bar according to the required size, and then make one end of it soft at a high temperature of about 500-600°C, and then directly press the valve stem with a punching force of more than 45 tons in the mold. The head is stamped and form...

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Abstract

The present invention relates to forging technology, and is especially valve rod forging and cold extruding formation process. The valve rod as the part of valve is one rod, and has one thicker end with slots as the head, the other end with thread and one middle part of smooth rod. The formation process includes the steps of cutting rod, end chamfering, slotting in the head, chamfering the sealing surface, chamfering the root of the thread part, cold extruding threads, rolling the smooth rod, etc. The production process has saving in material, high production efficiency and low cost.

Description

technical field [0001] The invention relates to a forging process, in particular to a valve rod forging and cold extrusion forming process. The valve stem is an accessory suitable for various valves. Background technique [0002] The valve stems of various valves in the prior art are originally designed to have 90-degree edges and corners at the root of the thread, so the seals that are easy to wear and the polished rod parts were originally processed by a lathe and then polished, and the smoothness is not good enough. , it is easy to damage the packing, and the valve stem has a large lifting force; the thread of the original thread part is processed by a lathe, so the precision is not good and the material is wasted. [0003] In the prior art, the valve stem is made through various cutting processes such as turning, milling, etc., so a complete valve stem can only be completed through multiple processes and multiple cuttings, resulting in waste of man-hours and raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P13/00
Inventor 朱志远
Owner 朱志远
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