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Title: |
1898 article - A Manufacturing Lathe |
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Source: |
1898-04-07 American Machinist |
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Insert Date: |
1/22/2014 9:05:21 AM |
From the 1898-04-07 American Machinist
A Manufacturing: Lathe.
As to the means that may properly be employed for the production of a piece of given size or shape it makes a vast difference how numerously it is to be duplicated. If a single piece is to be made, or a hundred pieces, or a hundred thousand, the process or manufacture should be very different in each case. For the latter the automatic screw machine (which makes many other things as well as screws) is doing wonders in cheapness and accuracy of work. It must have occurred to many a mechanic, as he has stood and watched one of these machines continuously dropping out its screws, studs, pins, rollers or whatever it might be employed upon, that for some purposes, as, for instance, in jobs of the 100 class, a machine of similar character, but without the automatic feature, would be of value. This idea seems to be embodied in the machine which we here illustrate, and it will be found to possess a number of interesting features.
The half-tone, Fig. 1, shows the complete machine and calls for no special remark, except that it does not show all the appliances hereafter spoken of. Figs. 2, 3 and 4 are, respectively, side and front views and plan of the lathe, with some of the stops or gages to be spoken of later not shown. The spindle of the lathe has a four-step cone, and is intended usually to run continuously. The stock is fed in bars or rods through the hollow spindle, the split chuck being operated by the horizontal lever and the back end, Fig. 4, and a stop gage, as seen in Figs. 5 and 6, determining the length. This gage swings back out of the way, as shown by the dotted lines, Fig. 5.
The tool carrier consists, first, of a main carriage, which has a longitudinal movement by the central horizontal screw and the hand wheel at the right. Upon this there is a cross-slide operated by the hand lever in front with a rack and pinion movement, an adjustable stop in either direction being provided at the back, and the lever in front, by means of the clamping screw and quadrant, holding the slide whenever desired. upon this cross-slide are two longitudinal slides each carrying a tool post, the post at the back being high enough to provide for the insertion of the tool. These slides are independently operated by the two horizontal levers on the top of the carriage, Fig. 4, and adjustable stops, Fig. 6, are also provided. In Fig. 5 one only of these stops or gages is shown, with dotted lines for its position when swung up out of the way. It will be seen that this machine is entirely without automatic feeds or movements, but its adaptability to some special operations, especially when not numerous, will readily suggest itself. It is the invention of Mr. G. H. Webb, of the Pawtucket Manufacturing Company, Pawtucket, R. I. |
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