Introduction of serration machining on CNC lathe

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Introduction to serration machining on CNC lathe

in the past, machining serration on parts required an additional operation on a milling machine or broaching machine. In this way, additional machine tools need to be set up separately, resulting in additional labor costs (for milling machine or broaching machine operators), of course, additional handling, movement and possible temporary parts storage between processes. In addition, parts may need intermediate cleaning operations before serration processing

if you are one of the companies that take sawtooth processing as a separate operation, you will be happy to learn that there is a sawtooth processing razor, which can be used to carry out sawtooth processing on a CNC lathe, just like another process. Razors for sawtooth processing are manufactured by schwanog and sold in the United States by GST Tools Co., Ltd. (Roselle, Illinois). The tool is composed of replaceable blades and supporting tool holders. The high-speed steel blade with tin coating is composed of a 1/4 circle with six teeth. Only the first or guide teeth have a complete (finish machined) tooth profile. On the other five teeth, the tooth profile is a decreasing profile

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if you take the sawtooth processing of parts as the second, so as to ensure that the enterprise needs to operate again after the scientific research results come out, then with this sawtooth razor, you can simply take it as another process on the CNC lathe

at the beginning of sawtooth processing, the main shaft remains stationary, while the turret travels three times on the Z axis, forming the first five teeth and the fully formed sixth tooth in a progressive form

the tool is installed on the turret of the lathe and forms sawtooth along the part through continuous z-axis stroke. At the beginning of this process, the spindle remains stationary while the tool runs three times to form the first five teeth and the sixth tooth in full shape in a progressive stage. Then the spindle is indexed to the next tooth position (there needs to be a c-axis), in which the first five teeth are formed incrementally, and the last tooth is completed. Each time when the spindle is indexed to the next tooth position and the turret completes the part stroke, the machining of one tooth is completed. This process continues until the part divides the whole circle and the serration is completely formed

once the first tooth is fully formed, the spindle will index the part to the next tooth position, and the turret will finish another step to complete the tooth processing. Every time the spindle is indexed, a complete tooth is formed. The indexing cycle continues until the required sawtooth shape is completely machined

the process is simple and fast. For example, the serration of 1045 steel parts can be processed in less than 7 seconds on an ordinary CNC lathe with c-axis function. Combining the sawtooth processing operation into a lathe process can simplify the processing of parts: this operation does not need to be carried out on additional machine tools, avoiding the cleaning of parts between different processes, the setting and operation of additional machine tools. The fixture cost is mainly designed according to the shape and material of the sample, as well as the handling process of additional parts. The most important point is that the parts are completely machined when leaving the lathe, and are ready for cleaning and sending to the customer

According to the GST report, the blade for sawtooth processing can be sharpened by the end user, but facilities for tool re centering must be provided, said Yang Jie, vice president of the Automotive Materials Engineering Research Institute of the technology center of Great Wall Motors Co., Ltd. The removal of the blade is fast and simple because it is fixed with a single screw. Because the tool holder is only an adhesive tool, the tool for sawtooth processing can be used on both multi spindle machine tools with c-axis function and single spindle machine tools

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