For gear hole machining process with diameter greater than 16mm

Abstract

The invention discloses a machining technology for a gear hole of which the diameter is larger than 16mm. The machining technology comprises the following steps: selecting machining equipment and cutting tools; clamping a workpiece and locating the workpiece by using an angular locating device; compiling the machining technology and machining program; separately putting a strong drill bit used fordrilling and a strong drill bit used for reaming in the corresponding blade guards of the program and carrying out adjustment; using the strong drill bit used for drilling to machine a bottom hole ofthe gear hole, reserving a 0.1-1mm reaming allowance in the radius direction, and keeping the supply of water-soluble cooling liquid in the whole machining process; using the strong drill bit used for reaming to carry out reaming; and during reaming, setting the linear speed of the strong drill bit at 30-40m / min and setting the feeding speed at 0.07-0.12mm / r. The smaller the reaming allowance, the higher the linear speed and the feeding speed, and the supply of the water-soluble cooling liquid is kept in the whole machining process. By using the specific strong drill bits, the machining process of the gear hole can be finished through the drilling and reaming two procedures, the machining efficiency is high, and the repeated use rate is higher.

Description

technical field [0001] The invention belongs to the technical field of tooth hole processing of high wind pressure rock drilling tools, and in particular relates to a process for processing tooth holes with a diameter greater than 16 mm. Background technique [0002] With the rapid development of my country's economic construction, the demand for rock drilling tools in construction engineering fields such as mining, energy construction, foundation engineering construction, and traffic road development is on the rise. At the same time, the types, performance and quality of drilling tools are also proposed higher requirement. [0003] At present, when processing the tooth holes of high wind pressure rock drilling tools, since the hardness of the workpiece is as high as HRC45-46, and the precision of the tooth hole is high, in order to ensure the matching accuracy with the alloy tooth, the roundness of the tooth hole is required to be within 0.01mm , the taper is within 0.02mm,...

AI Technical Summary

Problems solved by technology

[0004] During the long-term use, we found that the existing processing methods basically have the following problems: 1. The processing steps include three steps of drilling bottom hole, rough reaming and fine reaming, and three corresponding tools need to be installed. All need to set the tool at least once, resulting in low processing efficiency; 2. Each tool will produce a certain error value once. To ensure that the overall error generated by the three tools is within the required range of the tooth hole, it is necessary to reduce the processing of each tool. The allowable error has high requirements on the accuracy of the tool itself and the accuracy of tool processing, and the processing cost and difficulty are very high; 3. Machining a gear hole requires the cooperation of three tools to complete. There will always be a certain amount of wear after processing. After the amount of wear increases, it will exceed the allowable high-precision error value, and it will no longer be used for the processing of gear holes, which will increase the cost of tool consumption.