CNC Machining Services in China

A must-have manual for CNC! 1. knife point The tool position point is a reference point on the tool, and the trajectory of the relative movement of the tool position point is the processing route, also called the programming trajectory. 2. Knife setting and setting point Tool setting means that the operator makes the tool position coincide with the tool setting point through a certain measurement method before starting the NC program. You can use the tool setter to set the tool, its operation is relatively simple, and the measurement data is relatively accurate. After positioning the fixture and installing the parts on the CNC machine tool, you can use the gauge block, feeler gauge, dial indicator, etc., and use the coordinates on the CNC machine tool to set the tool. For the operator, it is very important to determine the tool setting point, which will directly affect the machining accuracy of the part and the accuracy of program control. In the batch production process...

1. Precision Machining Shaft Parts 1) Dimensional accuracy, the journal is the main surface of shaft parts, which affects the rotation accuracy and the working state of the shaft. The diameter accuracy of the journal is usually IT6 ~ 9 according to its use requirements, and the precision journal can reach IT5. 2) Geometric accuracy, journal geometric accuracy (roundness, cylindricity), generally should be limited to the diameter tolerance point range. When the accuracy of a geometric shape is required to be higher, the allowable tolerance can be specified on the part drawing separately. 3) In The machining position, the accuracy mainly refers to the coaxiality of the matching journal of the assembly transmission parts relative to the supporting journal of the assembly bearing, which is expressed by the radial circular runout of the matching journal to the supporting journal; According to the use requirements, the high precision axis is 0.001 ~ 0.005mm , and the general p...

The processing method of the surface of the CNC machined part first depends on the technical requirements of the machined surface. However, it should be noted that these technical requirements are not necessarily the requirements specified in the part drawing. Sometimes, they may be higher than the requirements on the part drawing in some respects due to technological reasons. For example, due to the misalignment of the benchmarks, the processing requirements for the surface of some CNC workpieces are increased. Or, because it is used as a precision benchmark, it may put forward higher processing requirements. When the technical requirements of the surface of each CNC machined part are clarified, the final processing method that can guarantee the requirements can be selected accordingly, and can determined processing methods of several working steps and each working step. The selected machining method of CNC parts should meet the requirements of parts quality, good machining econ...