Tolerance range and machining allowance of seamless steel pipe
To understand the processing allowance of seamless steel pipe is generally left how many millimeters, we must first understand the dimensional tolerance range of the product itself. The dimensional tolerance of the product refers to the allowable range of variation of the actual size of the product. (Doubt: due to equipment, environment, technology, materials and other factors, we can not produce an absolutely consistent product size, the size of any product is a relative value, not an absolute value, is a allowed controllable range of size.) The purpose of the tolerance is to ensure that the size of the product changes within this range, in order to meet the requirements of interchangeability or mutual coordination between products.
For different purposes, different production methods, different production equipment between the production of seamless steel pipe size tolerances are very different, the professional level of technical personnel also directly affects the size of product tolerances. Once again, we remind you that when reserving processing allowance, you should fully understand the production performance of the product and the guaranteed dimensional tolerance range. Then specific problem specific analysis to determine the processing allowance.
The following is based on our own experience to briefly discuss the reservation size of seamless steel pipe processing volume between different production methods.
1, precision seamless steel pipe, general inner and outer diameter tolerance can be guaranteed plus or minus 0.1mm, special requirements tolerance can be guaranteed plus or minus 0.025mm. It is recommended to reserve a machining allowance of 0.2mm or above for friction machining, which can be retained by yourself after communication and coordination with the manufacturer according to the actual tolerance data.
2, ordinary hot-rolled seamless steel pipe processing allowance is relatively large, this is because in the production process of ordinary hot-rolled seamless steel pipe, the outer diameter and inner diameter tolerance range is large, in order to ensure that the processed steel pipe can meet the needs of the mechanical structure and parts processing field, the need for a larger processing allowance to make up for the tolerance. The machining allowance can be retained after communication and coordination with the manufacturer according to the actual tolerance data.
3. It is recommended to fully communicate and coordinate with the manufacturer. Comprehensive consideration of various factors, specific problems specific analysis, to determine the most appropriate processing allowance. The processing allowance reservation of seamless steel pipe is a complex problem, which needs to consider many factors. In order to ensure the quality and accuracy of the steel pipe, it is recommended to fully communicate and coordinate with the manufacturer during the production process to determine the most appropriate processing allowance. According to the actual tolerance data and the production situation, the processing allowance is reasonably selected to ensure that there will be no problems in the post-processing process.
