Separate Fracture Self-Fixing Welding Repair Method for Box-shaped Components
A welding repair and self-fixing technology, which is applied in the mechanical field, can solve problems such as deformation cannot be controlled within the allowable range, welding repair work cannot be successful, and flatness errors, etc., to achieve the reduction of weld deformation, stress reduction, and fracture face firm effect
Active Publication Date: 2019-04-26
BAIYIN NONFERROUS GROUP
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Problems solved by technology
Generally, the welding repair is to open the groove first, then find the alignment, point solidification, and then weld according to the welding method of controlling deformation. Due to the strong stress generated during welding, no matter how much it is controlled, it will cause large deformation, and the deformation cannot be achieved. Stays within the allowable limits, preventing weld repairs from being successful
The difficulty of welding and repairing the separated fractured components is mainly due to the shape error and flatness error caused by the welding deformation, so there is a certain degree of difficulty in repairing
However, the deformation caused by improper measures during welding makes the accuracy loss and cannot be used.
Method used
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[0027] Such as figure 1 As shown in , 2, the through-crack of the mobile jaw plate of the jaw crusher is a. After the two workpieces of the separated fracture are matched, they are pressed together by the table and welded by two skilled welders in sections to form a thin self-crack. Fixed welds; specific as image 3 As shown: the irregular gap is divided into four working faces: upper, lower, left, and right. Each working face can be divided into three sections. When the working surface is long, it can also be divided into multiple sections, which can be flexibly controlled. should. Compare below image 3 The schematic diagram of the A-A section shown shows the working sequence;
[0028] 1. by image 3 Start welding at 2 and 5 of the center, and back off from the middle point to both sides during welding;
[0029] 2. by image 3 Start welding at 8 and 11 in the center, and back off from the midpoint to both sides during welding;
[0030] 3. by image 3 Diagonal welding...
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The invention discloses a self-fixing welding repair method for separated fracturing of a box-shaped component. The box-shaped component is repaired through the self-fixing work method, and the method comprises the steps that firstly, irregular cracks caused by fracturing of the box-shaped component are used for naturally combining fractured parts of the box-shaped component without forming a groove, and several contact points not favorable for combination are removed through grinding by an angle grinder; then, the box-shaped component is placed under a table tool and the fractured parts are compressed face to face so that the box-shaped component can resist certain deformation; two welders weld the corresponding positions segment by segment, and the table tool is removed after welding; U-shaped grooves are formed segment by segment in the symmetrical positions, and each segment of the groove is about 200 mm long; afterwards, two skillful welders conduct welding simultaneously, and through welding needs to be guaranteed; and after welding, grooves are formed in the other side for welding, and the rest of the steps are conducted in the same way till welding is completed. Therefore, the welding deformation size is minimized, the deformation amount of the fractured surface of the box-shaped component welded and repaired through the method is controlled, firmness is achieved, the service life is prolonged, and the cost is reduced.
Description
technical field [0001] The invention belongs to the field of machinery, and relates to a box-shaped mineral processing equipment jaw crusher jaw, in particular to a self-fixing welding repair method after the box-shaped component jaw is separated and broken. Background technique [0002] Box-shaped component parts are a common structure in mechanical equipment. The box-shaped structure used in mechanical equipment often has certain accuracy requirements for shape, flatness and dimension, otherwise it will not meet the conditions for use. Such box-shaped components are generally cast components, and their materials are mostly cast steel. Separation fractures are generally brittle fractures, and the key problem is the deformation after welding. Generally, the welding repair is to open the groove first, then find the alignment, point solidification, and then weld according to the welding method of controlling deformation. Due to the strong stress generated during welding, no ma...
Claims
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IPC IPC(8): B23K31/02B23P6/04
CPCB23K31/02B23P6/04
Inventor 盛恩源
Owner BAIYIN NONFERROUS GROUP