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Help CenterLinjiang Steel Pipe Flange Welding Equipment, Oil Pipe Welding Equipment, Oil Cylinder Flange Welding Equipment
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The goal of controlling welding stress is to reduce its peak value and make it evenly distributed. The main measures for professional welding processing to control welding stress are as follows:
1. Reduce the welding restraint: Try to weld the weld under a smaller restraint. Try not to use the method of rigid fixation to control deformation to avoid increasing the welding restraint.
2. Adopt a reasonable welding sequence: Under the assembly condition with many welds, the welds with larger shrinkage should be welded first, and then the welds with smaller shrinkage; the welds with larger restraint and unable to shrink freely should be welded first, and then the welds with smaller restraint and able to shrink freely.
3. Reduce the weld size: Under the condition of meeting the design requirements, the weld size and layer height should not be increased. The concept that the larger the weld, the safer should be changed.
4. Use the hammering method to reduce the welding residual stress: Immediately after each layer of the weld bead is welded, use a round - headed slag - knocking hammer or an electric hammering tool to evenly tap the weld metal to make it produce plastic extension deformation and offset the local tensile stress borne after the weld cools.
5. Use a shot blasting machine for rust removal: Offset the welding stress of the component through the uniform tapping of steel shots.
6. Reduce the stiffness of the welded part and create conditions for free shrinkage.
During welding processing, the most frequently mentioned thing to employees is safety issues. This is a very important point. During welding processing, it is found that many people do not do this during work. In order to ensure everyone's safe work, the following will introduce in detail the safety precautions for welding processing.
1. Welding processing should be easy to operate, reduce walking back and forth, and avoid unnecessary bending and tiptoeing actions.
2. The positioning should be accurate and reliable to avoid misoperation caused by a slight vibration.
3. The movement direction of the operating parts of the machine tool equipment and the movement direction of the operated parts should comply with the regulations, and there should be simple symbol marks.
4. Install necessary interlocking mechanisms to avoid uncoordinated actions of the operating parts and accidents caused by uncoordinated actions during multi - person operation.
5. The structure and arrangement position of the handles, handwheels, and buttons should comply with the regulations. The start button should be installed inside the casing or be equipped with a protective ring to prevent accidental touching. The handwheels and handles installed on the shaft will rotate with the shaft and cause injury during automatic feeding, so an automatic disengagement device should be installed.
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