With the rapid development of this society now, industrialization also with the new generation, precision machining inside the industrialization occupies a dominant position, for industrialization to bring quality improvement , however, it is also bad, such as will cause work deformation, then what factors lead to work deformation? If you want to know, go with me to understand it.
The shape of the deformation is proportional to the complexity of the size, wall thickness size ratio and width and length, and is proportional to the material stability and rigidity. So in the design of parts as far as possible to reduce the impact of these factors on the deformation of the workpiece. Especially in the structure of large parts should be more reasonable structure. The hardness of the blank, looseness and other defects should also be strictly controlled before processing to ensure the quality of the blank and reduce the deformation of the workpiece caused by it.
When the workpiece is clamped, the correct clamping point should be selected first, and then the appropriate clamping force should be selected according to the position of the clamping point. Therefore, as far as possible, the clamping point and the support point are the same, so that the clamping force acts on the support, the clamping point should be as close as possible to the processing surface, and choose the location where the force is not easy to cause clamping deformation.
When there are several directions of clamping force on the workpiece, to consider the sequence of clamping force, for the workpiece and support contact clamping force should act first, and not too large, for the main clamping force to balance the cutting force, should act in the last.
Secondly, to increase the contact area of the workpiece and the fixture or the use of axial clamping force. Increase the rigidity of the part is an effective solution to the occurrence of clamping deformation, but due to the characteristics of the shape and structure of the thin-walled class of parts, resulting in a lower rigidity. This results in deformation under the clamping applied force.
Increasing the contact area between the workpiece and the fixture can effectively reduce the deformation of the workpiece piece during clamping. For example, in the milling of thin-walled parts, a large number of elastic pressure plate, the purpose is to increase the contact area of the contact parts; in the turning of thin-walled sleeve of the inner diameter and outer circle, whether using a simple open transition ring, or the use of flexible arbor, the whole arc jaws, etc., are used to increase the contact area of the workpiece clamping. This method is conducive to carrying the clamping force, thus avoiding the deformation of the part. The use of axial clamping force, also widely used in production, the design and production of special fixtures can make the clamping force on the end face, can solve the workpiece bending deformation due to the thin wall, poor rigidity, resulting in the workpiece.
