| 单词 | tailstock |
| 例句 | To lock the tailstock in its adjusted position along the shears, it has a bolt projecting down through the plate c, which bolt receives the hand nut d. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The cone is adjusted to fit into the hole of the pipe, by means of the tailstock spindle, and the opposite end is usually held in a chuck. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Therefore, it is not surprising to find on the later machine an outboard or “tailstock” support for the work. Screw-Thread Cutting by the Master-Screw Method since 1480 But the headstock subclass is not superior necessarily to the tailstock subclass simply because the headstock is commonly more complex than the tailstock. The Classification of Patents The tailstock is also made of two tees joined by a nipple. The Boy Mechanic: Volume 1 700 Things for Boys to Do On account of the weight of the tailstock it is fitted with rollers, which may be operated to lift it from the bed when it is to be moved along the lathe bed. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z These reamers are held while in use in a socket inserted in the tailstock spindle, as when using a twist drill. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The plates p p are bolted by screws to the headblock h and the tailstock t of the lathe. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z This bed carries a headstock and a tailstock similar to a lathe. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Care must be taken to get the tailstock center vertically over the bed, else taper turning will result. The Boy Mechanic: Volume 1 700 Things for Boys to Do The tailstock is provided with a bracket, carrying a pinion in gear with the hand-feed rack, so as to move the tailstock along the bed by means of the pinion. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Examples of Taper Work Setting Tailstock Center for Taper Turning.—Suppose the tailstock center is to be set for turning part C, Fig. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Furthermore, the tailstock has to be moved back in line with the live spindle axis for turning parallel again, and this is a troublesome matter, especially when the work is long. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z To determine how much the tailstock of a lathe must be set over to turn a given taper, the construction shown in Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock is set over until the point of b will just touch the bottom of the groove at each end of the work. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The lever for securing the tailstock to or releasing it from the shears is shown at t. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock center h1, after being oiled, should be set up just tight enough to eliminate all play, without interfering with a free rotary movement of the work. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The result is precisely the same if the taper is turned by a taper-turning attachment instead of setting the tailstock out of line. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The latter is forced out by the hand wheel of the tailstock with sufficient force to hold the work by friction while the bolts and plates are applied. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The dead centre spindle is locked at each end of its bearing in the tailstock, thus securing it firmly in line with the live spindle. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock, or back head, carries a tool holder in the rear of the spindle, in which fits also a drill bit or other cutting tool. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z This is done by turning handle n, and when the center is properly adjusted, the tailstock spindle containing the center is locked by tightening handle p. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The construction of the tailstock or poppet-head, as it is sometimes termed, is shown in Figs. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Its inner end is threaded to a sleeve that is within the headstock, and whose end is coned to fit a corresponding cone at the inner end of the bore of the tailstock. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z As the bore of the tailstock is exactly in line with the live spindle, it follows that the dead spindle will be locked also in line with it. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z This lever has a joint at 2, and is connected to the tailstock spindle at a joint marked 3. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z These bushings are rough-turned on the outside while the outer end is supported by the cross-shaped piece or “spider” which forms a center-bearing for the tailstock. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The tailstock or poppet-head screw is a right hand because the nut moves in this case. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock has a spindle 9 inches diameter. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z It fits on the bed in the place of the tailstock, and is used for cutting out the seats for jewels, in plates, or settings. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock carries two tool holders, similar to those on an ordinary lathe. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tool-head of this boring-bar carries two tools located 180 degrees apart and it is fed along the bar by a star-feed mechanism shown attached to the bar and the tailstock spindle. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. This device may be placed nearer to the end of b, since the wedge may pass through the front leg of the tailstock instead of to the right of it, as in Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The headstock and tailstock are attached to the bed in the usual manner, the frame carrying the emery wheel is bolted to the slide rest as shown, the rest traversing by a feed spindle motion. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z But if the lathe tailstock sets over as in Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z To the bore of the tailstock there is closely fitted an arbor c, accurately turned in the lathe, and having at the end d and at e two short sections of enlarged diameter. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z If the work is mounted between the centers, one method of turning a taper is to set the tailstock center out of alignment with the headstock center. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. It is equipped with special adjustable headstock and tailstock fixtures designed to take crankshafts having strokes up to about 6 inches. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The tailstock center is next set over by guess and a caliper tool is clamped in the toolpost. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The tailstock fixture is also adjustable and it is mounted on a spindle which revolves in a bushing in the tailstock barrel. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The arm is readily removable, when desired, or the tailstock can be slid off its seat if required. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z In case there is any variation, the tailstock center is adjusted laterally, other trial cuts are taken, and the test repeated. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The total length of 9 inches multiplied by 1/12 inch = 3/4 inch, and 1/2 of 3/4 = 3/8, which is the distance that the tailstock center should be offset. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Side View showing Relative Positions of Gage and Work Setting the Tailstock Center with a Caliper Tool.—Another method of setting the tailstock center for taper turning is illustrated in Fig. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The slide can be turned more evenly by using the tailstock center to force it around. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. It may be remarked, however, that in setting the tailstock over it is the point of the dead centre when set adjusted to the work length that must be measured, and not the tailblock itself. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The center is then drilled and reamed at one end by pressing the work against the revolving drill with the tailstock spindle, which is fed out by turning handle n. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The work is then removed and the tailstock is shifted along the bed until the distance a—b between the extreme points of the centers is exactly 1 foot. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The Taper Attachment.—Turning tapers by setting over the tailstock center has some objectionable features. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Furthermore, the adjustment of the tailstock center must be changed when turning duplicate tapers, unless the length of each piece and the depth of the center holes are the same. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. If, however, the taper is given as so much per foot, the distance to set the tailstock over can be readily calculated. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z Grinder for Truing Lathe Centers Some lathes are equipped with hardened centers in both the head-and tailstock and others have only one hardened center which is in the tailstock. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. It will be noted that the drill is held in a chuck, the taper shank of which fits into the tailstock spindle, this being the method of holding small drills. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. One of these is located in the head and enters a bushing in the large faceplate and the other is in the tailstock and engages the tailstock fixture. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The crank is then clamped at the tailstock end and the revolving fixture is secured by the two T-bolts previously referred to. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. There is, however, as may be seen, a back stand or tailstock of a very solid character. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z After the tailstock center is withdrawn, the emery wheel is adjusted for grinding. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Most lathes have lines on the stationary and movable parts of the tailstock base which show when the centers are set for straight turning. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Testing Work with Dial Indicator A hole is next drilled in the end of the rod by using a twist drill in the tailstock. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. When a reamer is used in the lathe, the outer end is supported by the tailstock center and should have a deep center-hole. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. A very ready method of securing or releasing a small tailstock to a lathe shears is shown applied to a wood turner’s hand rest in Fig. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock center is ground by inserting it in the spindle in place of the headstock center. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The lathe is run very slowly for reaming and the reamer is fed into the work by feeding out the tailstock spindle. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The tap blank is also set to the same angle a by adjusting the tailstock center, thus locating the axis of the work parallel with the slide of the taper attachment. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. When using the first method the tap must be placed with the point toward the headstock, the shank end being supported by the tailstock center. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. A cross slide is provided to the tailstock, and upon this slide the head of the tailstock is pivoted so as to bore taper holes; the tailstock thus virtually becomes a compound slide rest. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The tailstock center is adjusted until this pointer just touches the work when in the positions shown by the full and dotted lines at C, Fig. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. The pitch of a taper thread that is cut with the tailstock set over will also be slightly finer than the pitch for which the lathe is geared. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. |
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