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Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device

A technology for welding joints and test devices, applied in welding equipment, metal processing equipment, manufacturing tools, etc., to achieve the effect of increasing the probability of thermal cracking

Inactive Publication Date: 2016-06-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this test method can only be used for welding cold crack tests, and the adjustment of rigid restraint must be solved by changing the size of the sample

Method used

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  • Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device
  • Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device
  • Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] As shown in the accompanying drawings, a welded joint cold cracking tendency test device based on adjustable rigid restraint of the present invention includes a base, a moving fixture, a fixed fixture, a first support plate, an oil cylinder, a guide column, a second support plate, and a load A sensor, a slider, a first displacement sensor and a second displacement sensor, wherein:

[0023] A first support plate and a second support plate are arranged on the base, and a guide column arranged along the horizontal direction is connected between the first support plate and the second support plate; a slide block is provided on the guide column, and can be carried out along the guide column. To move, a moving fixture is set on the slider, and the slider moves along the guide column; an oil cylinder is set ...

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Abstract

The invention discloses a device for testing cold cracking tendency of a welding joint on the basis of adjustable rigid restraint and an apparition of the device. The device is characterized in that a first support plate and a second support plate are arranged on a base, and guide columns are connected between the first support plate and the second support plate; sliders are arranged on the guide columns, a movable clamp is arranged on the sliders, an oil cylinder is arranged on the base and connected with the sliders, a load sensor is arranged on the second support plate, a fixed clamp is fixedly connected with the second support plate and is opposite to the movable clamp, and each of a first displacement sensor and a second displacement sensor is connected with two samples; the load sensor, the first displacement sensor and the second displacement sensor are collected with a data acquisition card respectively, and the data acquisition card is connected with a controller which is connected with the oil cylinder. External restraint conditions of the welding joint are simulated by the device, and the welding samples keep fixed restraint length in a test process for rigid restraint cracking test, so that the critical restraint stress of steel during cold cracking can be obtained.

Description

technical field [0001] The invention belongs to the field of welding technology, more specifically, relates to a welded joint cold crack dip / hot crack tendency test device based on adjustable rigid restraint, especially relates to a kind of adjustable rigid restraint based on welded joint cold crack / hot crack Tendency test device. Background technique [0002] Cracks are the most common defects in welded joints, and the cracks in welded joints in many large-scale engineering structures are caused by welding cold cracks or hot cracks. For offshore engineering structures, cold cracks / hot cracks sometimes occur in welded joints such as offshore platform jackets and pile legs, causing huge economic losses. At present, a large number of new high-strength steels are used in marine engineering structures, and the problem of cracks in welding construction is becoming more and more prominent, and the hysteresis of welding cracks makes them particularly harmful. Therefore, how to qu...

Claims

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Application Information

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IPC IPC(8): B23K31/12
CPCB23K31/12
Inventor 徐连勇韩永典荆洪阳赵雷
Owner TIANJIN UNIV
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