US Patent: 2,921,490
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| Means for Cutting Threads
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Patentee:
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| Louis Kipp (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 28, 1954 |
| Granted: |
Jan. 19, 1960 |
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Joel Havens
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Description: |
| Claim:
As is well known to those skilled in the art, certain types of machines, as for example a lathe or vertical boring mill, are frequently used to cut threads on a given work piece. When thread cutting is accomplished in a machine of this nature, the cutting tool is mechanically interlocked with a lead screw on the machine, whereby the tool is positively urged to pass over the work with a given lead which corresponds to the pitch of the thread to be cut. This lead is determined by the particular gears in the mechanical train which interlocks the lead screw and the movable tool. The usual procedure is to first mechanically interlock the tool and the lead screw and then set the tool to the desired depth of cut. The tool is then successively passed over the work, the depth of out being reset for each pass. As frequently happens, the tool begins to chatter under the operation when the desired or optimum depth of cut is properly set. This of course causes unwanted marks on the threads of the work piece and a generally undesirable product. Heretofore, when tool chatter occurs, it has been the practice for the machine operator to merely reduce the depth of out thereby taking a lighter cut and prolonging the time to finish thread cutting operation. This is thought obvious in View of the fact that if lighter cuts are taken, more passes are required to finish the threading sequence. |
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