Hydraulic type external thread cold rolling device

A technology of external thread and cold rolling, which is applied in the field of mechanical processing appliances, can solve problems such as drilling tool breakage, and achieve the effects of easy production, quality assurance, and simple structure

Inactive Publication Date: 2013-07-24
JIANGSU SHUGUANG OIL DRILLING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing technology is effective and can greatly improve the strength of oil drilling tools, there are still occasional vicious accidents of drilling tool breakage in oil drilling engineering

Method used

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  • Hydraulic type external thread cold rolling device
  • Hydraulic type external thread cold rolling device
  • Hydraulic type external thread cold rolling device

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0015] figure 1 The hydraulic external thread cold rolling device shown includes a cantilever 1, hydraulic oil 2, a pressure gauge 3, a pin 4, a fork shaft 5, a mandrel 6 and a roller 7. The fork shaft 5 is a straight rod member, and the outward shaft end is provided with an open groove, and the roller 7 is installed in the open groove through the mandrel 6 , and the roller 7 rotates freely around the mandrel 6 . In this embodiment, the external thread of the oil drilling tool joint is rolled, and the thread is triangular, so the outer rim transverse section of the roller 7 is angular, and its angle is equal to the angle of the external thread of the oil drilling tool joint being rolled. In order to improve the quality of cold rolling, the roller 7 is hardened as a whole to HRC50-55. The top of the outer wall of the middle part of the...

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PUM

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Abstract

The invention discloses a hydraulic type external thread cold rolling device which comprises a cantilever, hydraulic oil, a pressure gauge, a pin bolt, a fork shaft, a central spindle and an idler wheel. The idler wheel is installed in an outward opening groove of the fork shaft through the central spindle, an axial groove formed in the top of the middle section and the opening groove are coaxial, the other end of the fork shaft is a cylindrical shaft, and a sealing element is arranged outside an annular wall. The cantilever is a two-section conjoined constructional element, a cylindrical cylinder body is preposed, and a rearmounted rectangular long strip is a clamping section. The hydraulic oil is contained in the cylinder body, and the end, provided with the sealing element, of the fork shaft is inserted into the cylinder body to form the hydraulic oil cylinder. A radial hole is formed at the tail end of the cylinder body and communicated with the pressure gage, the pin bolt installed in the radial direction is arranged at the top of the outer wall of the cylinder body, and the screwed pin bolt is inserted into the axial groove in the outer wall of the middle section of the fork shaft to form a guiding structure. The hydraulic oil cylinder is used for supporting the idler wheel, in a cold rolling process, exerted force is displayed through the pressure gage, pressing quantification is beneficial to controlling of batch cold rolling under same quantity value conditions, and uniform and stable quality of the cold rolling is ensured.

Description

technical field [0001] The invention relates to an appliance for mechanical processing, in particular, the invention relates to a cold rolling device for external threads. Background technique [0002] The cold rolling process is one of the non-cutting processes and is widely used in the machining industry. At normal temperature, the surface of the metal component is rolled by the pressure roller, which forces the microscopic protruding metal material of the rough layer on the surface of the metal component to produce plastic flow, and the excess metal flows into the adjacent microscopic pits. As a result, in addition to improving the surface of the metal component, The roughness grade also makes the surface structure grains of metal components thinner and fibrous, resulting in the phenomenon of "cold work hardening", so as to achieve the purpose of improving the strength, surface hardness and fatigue resistance of metal components. The depth of contemporary oil drilling re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P9/02
Inventor 张希平游志明杨爱华蒋后平
Owner JIANGSU SHUGUANG OIL DRILLING EQUIP CO LTD
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