Center milling cutter
A technology of milling cutter and tool holder, which is applied in the field of milling cutters in lathe finishing, can solve the problems of easy-to-use cutters and thimbles, short service life, time-consuming and labor-intensive, etc.
Pending Publication Date: 2018-09-14
汪风珍
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Problems solved by technology
[0003] The accuracy will be lowered. However, the concentricity accuracy of some processed products needs to be ≤0.02mm. There is no way for the workpiece held by the three-jaw chuck to meet the tolerance requirements of the drawings. To meet the tolerance requirements of the drawings, it is necessary to carry out rough turning first, and then finish turning , in finishing turning, the method of turning temporary thimbles is usually used to complete the processing. The lathe needs to adjust the angle of the small slide, and add a piece of No. 45 steel to the three-jaw chuck. In theory, the angle of adjustment of the small slide needs to be the center drill Half of the angle, the center drill is 60 degrees, then the angle of the small skateboard is 30 degrees, the tapered surface of the temporary thimble and the tapered surface of the center hole of the workpiece are completely consistent, so that the precision of the workpiece is high, if the small skateboard If the angle is not adjusted to 30 degrees, then the contact surface between the conical surface of the temporary thimble and the central hole of the workpiece is relatively small. When the turning tool is working, the workpiece is easy to let the tool, or the workpiece vibrates, or the service life of the temporary thimble It is very short. In order to adjust the angle of the small skateboard to the ideal state, it usually needs to be adjusted many times. In this way, the lathe takes a lot of time. Moreover, since the processing can only be completed by temporarily turning the thimble, if it is often necessary to perform fine lathing, It is time-consuming and labor-intensive to adjust the angle of the small skateboard every time
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[0017] The applicant explains the working principle and structure of the center milling cutter with reference to the accompanying drawings:
[0018] In the rough turning process of shaft parts, the machining size reserved by the turner is between 0.10mm and 0.15mm. During the finish turning, the temporary thimble needs to be turned on one side of the headstock. Now rough machining the temporary thimble, and then put it in the center Milling cutter, shake the tailstock handle, turning can be used, attached figure 1 It is a schematic diagram of the structure of an integrated central milling cutter. It should be noted that when processing temporary thimbles, the amount of turning is small, but the contact surface between the cutting edge and the workpiece is wide, so the rake angle is between 15 degrees and 30 degrees, while the general The rake angle of the milling cutter is between 3 and 8 degrees. The rake angle is large and the blade is relatively sharp. The disadvantage is t...
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A center milling cutter is a special processing cutting tool for a latheman to turn a temporary thimble during a finishing process of turning shaft parts. After the temporary thimble is processed by the center milling cutter, the taper angle of the temporary thimble is the same as the taper of a center hole, so as to ensure the smooth operation of the finishing process, reduce the number of timesthat the latheman is needed to adjust angle of a small skateboard when the temporary thimble is processed, further reduce the finishing time and ensure the quality of finish turning.
Description
technical field [0001] The invention belongs to a mechanical cutting tool, in particular to a milling cutter for finishing machining on a lathe. Background technique [0002] In lathe processing, the factory precision of the three-jaw chuck is generally ≤0.07mm. After a period of use, [0003] The accuracy will be lowered. However, the concentricity accuracy of some processed products needs to be ≤0.02mm. There is no way for the workpiece held by the three-jaw chuck to meet the tolerance requirements of the drawings. To meet the tolerance requirements of the drawings, it is necessary to carry out rough turning first, and then finish turning , in finishing turning, the method of turning temporary thimbles is usually used to complete the processing. The lathe needs to adjust the angle of the small slide, and add a piece of No. 45 steel to the three-jaw chuck. In theory, the angle of adjustment of the small slide needs to be the center drill Half of the angle, the center drill...
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IPC IPC(8): B23C5/00
CPCB23C5/00
Inventor 郑安平汪风珍
Owner 汪风珍