| How to solve the problem of elbow machine
Elbow machine in the production of elbow pipe fittings when the problem needs to be solved:
For pipe fittings with serious flattening outside of the arc, the compression die can be designed into the structure form of anti-deformation groove: select appropriate mandrel (flexible mandrel assembled with multi-section mandrel can be used if necessary), install correctly, and ensure that the pipe groove shaft of each component is on the same horizontal plane.
In the case of small radius bending, the bending process characteristics determine the thinning of the outer arc, which is inevitable. In order to avoid excessive thinning, the commonly used effective method is to use the cold push elbow machine of the side push device or the tail push device to offset part of the resistance of the pipeline bending by pushing or pushing, improve the stress distribution of the pipeline cross section, make the neutral layer move outward, and achieve the purpose of reducing the outer wall thinning of the pipeline.
For the outer arc bending of the pipe, first make sure that the heat treatment of the pipe is in good condition, then check whether the compression die pressure is too large, adjust the pressure properly, and finally make sure that the core and the pipe wall are well lubricated to reduce the bending resistance and the friction between the inner wall and the core.
Corresponding measures should be taken according to the wrinkling position in the arc. If the front cutting point is wrinkled, the mandrel position should be adjusted forward to achieve reasonable support for the pipe when bending. If the back cutting point is wrinkled, the anti-wrinkle block should be installed to make the installation position of the anti-wrinkle block correct, and the die pressure should be adjusted appropriately; If the arc is full of wrinkles, it means that the diameter of the mandrel used is too small, so that the gap between the mandrel and the pipe wall is too large, or the die pressure is too small, and the pipe can not fit the bending die and the wrinkle block well in the bending process. Therefore, the mandrel should be replaced and the die should be adjusted to make the die force appropriate.
Compensation and correction methods are used to control the bending back and forth phenomenon. Compensation method is through the comprehensive analysis of the influencing factors of bending back and forth, according to the various conditions of bending and back and forth trend, estimate the size of the back and forth amount in advance, in the mold design and manufacturing, correct the size and geometry of the working part of the convex and concave die, to achieve "over positive" bending. The correction method is to take measures on the mold structure to make the correction force concentrate on the bend, change the stress state, and strive to eliminate the elastic deformation and overcome the back and forth. For example, in bending, tension is applied at the same time as bending so that the entire section is under tensile stress. During unloading, the elastic recovery is consistent with the deformation direction, which can significantly reduce the rebound amount.
How to deal with the problem of elbow machine. The above problems can help each user to use the elbow machine in the case of problems need timely treatment. Our company welcomes every user to use the elbow machine consultation and inquiry.
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