SU1202724A1 - Tailstock - Google Patents

Description

The invention relates to a machine tool industry and can be used to lathes for machining rod materials.

The aim of the invention is to improve the accuracy and productivity of processing by increasing the rigidity of the headstock by reducing the departure. and the magnitude of the course quill.

FIG. 1 shows the tailstock in the section, the working position; in fig. 2 - the same, rear view and area of operation of the instrument; FIG. 3 is a section A-A in FIG. 2; in fig. 4 shows the trajectory of the center of the quill; in fig. 5 - sweep screw grooves sleeve.

The tailstock includes a housing 1, in the recess of which a rotary bracket 2 with a quill is mounted. 3. To precisely fix the center of the quill to the machine axis, an end coupling is used consisting of two coupling halves 4 and 5. The coupling half 4 is rigidly fixed in the housing 1, the coupling half 5 fixed in swivel bracket 2, is rigidly connected with a mechanized drive 6 of the tailstock and with a hollow sleeve 7, which is one of the two guides of the turning bracket 2. The drive 6 can be any (hydraulic cylinder, pneumatic cylinder, electromechanical device about ) .

In this case, the movement of the bracket with quill is carried out by an electromechanical drive. The rotary screw with the screw end 8 of the drive enters the nut 9, rigidly connected with the body of the tailstock 1 and the cam-sleeve 10. The cam 10 is a sleeve equipped with a curvilinear groove 11, which includes a pin 12 fixed fixed in the hollow sleeve 7. The groove consists of three yacTs: a straight section (pre-orientation) for withdrawing the center and a centering aperture with the length necessary and sufficient for turning the part that is safe with respect to the end; an E1INTOUT interface section with a length necessary and sufficient for the very possibility of turning and leaving the quillies from the center line (spindle axis) into the zone that ensures the subsequent operation of the multiposition tool head with a drill-type tool.

The coupling halves 4 and 5 and the cam 10 are set so that when the finger 12 is located on the straight section of the groove 11, the projections of one coupling half are located.

were located against the corresponding depressions of the other half-coupling in order to ensure correct coupling of the coupling half at the exit of the quill 3 onto the axis of the centers of the machine. Half coupling 4 is installed on the housing 1 so that when coupled coupling half axis quill located on the axis of the centers of the machine.

The sleeve 7 is also an intermediate support for the rotating end 8. The floor of the sleeve 13, which is rigidly connected at one end to the body of the tailstock, supports the other end of the pivoting bracket 2, i.e.

is a guide.

The control mechanism of the tailstock consists of a control roller 14 with a slit (milling), which contacts the shoulder 15 of the movable

coupling half 5, defined the two extreme positions of the movable bracket 2 and, therefore, the quill 3 by means of pins 16 and 17 and the commanders 18 and 19.

The quill 3 is mounted in the swing arm with the possibility of axial displacement by an amount A, compressing the composing prodin 20, with this pressing amount being pre-adjusted with a nut 21. The magnitude and, necessary for pressing the workpiece, is provided by installing the housing 1 relative to the workpiece so that the rotating

the center of the quill 3 abuts against the center hole of the part somewhat earlier than the coupling of coupling 4 and 5. The value of D is chosen minimal, but sufficient to compensate for the possible dimensionality of the lengths of the parts and the possible running-in of the center hole of the part during its processing.

The back grandma works as follows

in a way.

To remove the quill from the center line, the movement from the drive is transmitted to screw 8 of the screw pair 8-9. With fixed nut 9

the screw 8 starts to turn out of the nut, the drive 6 itself, a hollow sleeve, is carried along with it. 7 ,, bearing finger 12 and half coupling 5 with swivel crown3

matte 2 and consequently, pinot. Lew 3. Since the finger 12 is in the groove 11 of the fixed cam 10, then the moving elements 2-3-5-6-7-12 will rotate the screw 8 further to the right in a straight line segment, in areas f with rotation until while the cut of the control roller 14, by contact with the collar 15 of the movable coupling half 5, forces the control roller 14 with its pin 17 to press the commander 19, which will disconnect the drive 6 and allow the multi-position tool of the multi-position head, as the quill 3 for the common course L will go away with swivel bracket 2 returning to a corner in a safe area.

To exit the pintles to the line of the center of action, the reverse occurs when the screw 8 is turned in reverse, which will begin to screw. The movable elements together with the screw will move until the cut of the control roller 14, by contact with the collet 15 of the movable coupling half 5, moves the control roller to the left and the pin 16 presses the control unit 18, which will allow operation in the centers of the multi-position toolhead provided

02724

The end sleeve 4-5 is closed with a certain force developed by an electromechanical head, upon reaching which the drive motor 5 is shut off.

With the passage of the rectilinear section, the moving elements of the tailstock and, therefore, the quill

3 pre-oriented.

10 The rotating center of the quill 3 enters the center socket of the blank. At the end of the section (movable coupling half 5

is engaged and fixed with the fixed half coupling 4, while the quill 15 with the center is pressed into the center hole of the workpiece, squeezing by

4 pack of springs 20, pre-adjusted to a certain force, preload the nut.

20

In the event of a malfunction, if the end sleeve 4-5 closes with the tops of the teeth or something interferes with the movement of the moving elements when turning out from the pintle to the center line, the drive motor 6, developing a certain clamping force when an obstacle occurs, will turn off, but work in the centers

30 tool heads will not be allowed, as in this case, the command device 18 will not be pressed.

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Compiled by .A. Abramov Editor A. Shandor Tehred A. Kikemeziy Proofreader G. Reshetnik

Order 8355/12

Circulation 1085

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch SHSh. Patent, Uzhgorod, st. Project, 4

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Claims (1)

REAR BATTERY, comprising a housing with a quill, a drive for moving the housing and quills and a control system with command devices, characterized in that, in order to increase productivity and accuracy of processing by increasing the stiffness of the headstock by reducing the outreach and stroke of the quill, it is equipped with an arm mounted with the possibility rotation and axial movement in the housing, an end gear coupling, one of the coupling halves of which is mounted on the bracket, and the other on the housing, with a sleeve with a finger radially located inside it, rigidly connected with water movement, a coupling half mounted on the bracket, and mounted on a coupling half mounted on the housing, a sleeve with a screw groove and a nut fixed in it kinematically connected to the output link of the movement drive, while the sleeve finger is located in the screw groove of the sleeve.