US Patent: 3,104,505
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| Thread Grinding Machine
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Patentee:
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| John L. Schohl (exact or similar names) - South Bend, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 12, 1961 |
| Granted: |
Sep. 24, 1963 |
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Patent Pictures:
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Joel Havens
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Description: |
| Hobbs & Easton - patent attorneys
The present invention relates to a thread grinding machine and more particularly to a mechanism for converting a conventional lathe to a thread grinding machine. Most small and moderate size machine tool shops and firms have one or more conventional metal cutting lathes which can be used satisfactorily for thread cutting; however, this operation on the conventional lathe is slow, tedious, unduly time consuming, and limited in its application by the hardness of the metal, such that it renders small and moderately sized firms noncompetitive or capable of performing only a portion of the normally required work in the field. Thread grinding machines are available as separate units for firms of this size, but these machines are relatively expensive and the firms can not justify the expense in view of the rather limited use for them in their normal operation. It is therefore one of the principal objects of the present invention to provide a relatively simple mechanism for converting the conventional metal cutting lathe to a thread grinding machine, which can be readily mounted on and removed from the lathe without making any substantial or permanent alterations in the construction of the lathe. Another object of the present invention is to provide a thread grinding conversion unit for conventional lathes which consists of one or two pieces, easily assembled and mounted mechanisms, which will perform thread grinding operations as effectively and with the use of substantially the same procedure as the conventional thread grinding machine. Still another object of the invention as to provide a mechanism for converting conventional metal cutting lathes to thread grinding machines, which can use either a single or multiple rib grinding wheel and which includes a mechanism for effectively dressing the wheel without disassembling the grinding mechanism and without any substantial downtime being required. Still another object is to provide a thread grinding attachment for a lathe which requires little skill or practice in order to make satisfactory threaded products and which can be mounted on and connected to any standard or conventional lathe without the use of any special tools or equipment other than those used in conjunction with the thread grinding mechanism.
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