Assembly Drawing Tailstock This section contains information about tailstock After reading the section you will be able to • draw assembled views of the tailstock. black and white drawing of big pumpkin with tail isolated on white background - buy this illustration on Shutterstock & find other images. CIM Oct, April - ,CIM Oct, April - , April - , Oct Question Papers · Machine Drawing KEY (solution).
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To this end, according to another feature of the invention, a drum is provided on the cylindrical body for paying out the connecting cable. Knowing that for circular milling, it is necesary to effect only a little more than one turn, the diameter of the drum and the length of the cable will be dimensioned so that the cable may be wound over one and a half turns for example.
If this were necessary, in certain special cases, as for example producing a spiral, it would naturally be possible to provide a larger number of turns, by increasing to the same extent the number of winding turns of the cable, either on itself, or for high values, on a drum tailstock drawing large diameter comprising a semi-circular, helically machined supporting groove as made in conventional cable winders.
The rotary tailstock may also carry out large diameter turning operations. In order to do this, it is sutficient that the rotary drive power which is normally installed is suitable for the desired value.
The electrical supply relating to the rotary action tailstock drawing then permit an unlimited number of turns and to this end the device for winding the cable is completed by a conventional friction device serving uniquely for controlling the turning operations, the rest of the contacts which are especially for the circular millings, being collected on a current-collector which is disconnected tailstock drawing the turning operations.
The milling and boring machine according to the invention comprises means for advancing, controlling and locking the tail support, which means are placed partly on the latter and partly on the base plate. According to another feature of the invention, the cylindrical body is extendable in a forward direction by a member of parallelogram shape so that a complementary member of the machine may be mounted on the front face or on one or two parallel lateral faces opposite said parallelogram member.
In fact, for certain machining operations, it is necessary to have a tool-holding spindle which is radially shiftable with respect to the axis of tailstock drawing of the headstock and mounted on a support provided with an automatic radial advance.
In an embodiment of the invention, the above mentioned support of the complementary spindle receives its advance movement and the rotational control from a drive take-off conveniently located on the headstock, in the path of the drive means for rotating and advancing the main tailstock drawing.
Need Puma 8HC TailStock mechanical drawings
A plurality of tailstock drawing spindle supports of different types permitting milling, boring, tapping or grinding, may be mounted on the parallelogram member in front of the headstock. In a particular embodiment, they may all be mounted on the same radial advance support.
Where tailstock drawing than two spindle carriers would be necessary simultaneously for a particular machining operation, a larger number of lateral supporting faces could be provided on the front part of the headstock or a plate of large diameter could even be fixed to the front face of the latter, this plate tailstock drawing the necessary number of spindle carriers.
In the latter case, the rotational control would be constituted by the main spindle and the advance control by the shaft output normally provided on the front face of the headstock for controlling the face plate of conventional type.
In the preceding description, the use of spindle carriers as well as means for effecting circular machinings or division, has been referred to. However, they are tailstock drawing very useful in cases of conventional tailstock drawing where the vertical or horizontal path of the machine would be shown to be insufficient.
Machine Drawing by N. D. Junnarkar
Although it is less important proportionally, the horizontal increase may also be useful in certain extreme cases. In order that the invention may be more clearly tailstock drawing, reference will now be made to the accompanying drawings which show, by way of limiting example, one tailstock drawing thereof, and in which: Referring firstly to FIGURES 1 to 6 of the drawings, a milling and boring machine according to the invention is schematically shown therein in elevation.
It comprises conventional elements such as a table 1 on which a base 2 is horizontally movable to which base an upright 3 is bolted. A tailstock drawing plate 4 is displaced vertically on the latter.
The main particularity of the machine according to the invention resides in the cylindrical body 11 which rotates in the tail support on bearings 12 and 13, the axis of rotation being the same as that of the main milling spindle 14 and boring spindle 15 sliding in the preceding one see FIGURE 5.
In the conventional use of the machine, the milling, boring, piercing and tapping tools are carried by these spindles or even by one spindle 16 at high speed, the part is fixed to the bed plate The cylindrical body 11 terminates at the front in a parallelogram-shaped tailstock drawing part In the use of the machine according to the invention and referring to FIG- URES l2 and 13, it may be seen that on the lateral face 18 of the parallelogram extension in front of the cylindrical body 11, has been mounted a U-shaped support 19 in which a slide block 20 is moved, which supports a spindle carrier 21 on which is mounted a milling cutter A workpiece 23 of large diameter and length has been fixed on the bed-plate and its circular face 24 is machined by the milling cutter during the rotation of the cylindrical body.
In a second case of machining shown in FIGURES 16 and 17, this time use is made of two spindle carriers 25 and 26 mounted on two supporting devices identical to tailstock drawing preceding.
It is then possible simultaneously to effect two different circular machining operations 27 and 28 with two milling cutters 29 and In a third case of machining, illustrated in FIGURE 18, use is made of a grinding spindle carrier 31 mounted in the same support and permitting an internal centring 32 to be effected.
The displacement of tailstock drawing tail support 5 on the base plate 4 is obtained by a rotary nut 33 fixed to the latter and a screw 34 fixed to the tail support 5 by bearings 35 and The rotary nut is driven by pinions 37, 38, 39 and a variable speed motor reducer tailstock drawing The cylindrical body 11 comprises in the front as indicated above, a parallelogram member 41 whose front part is provided with four threaded holes 42 and two keys 43 FIGURE 3 for fixing auxiliary heads.
FIGURE 19 shows that between the parallelogram member 41 and bearing 12 is placed a wide flange 49 which is localised in length by the corresponding face of the tail support 5 and a circular clip 50 fixed to the latter by means of screws