CS195632B1 - Workpiece clamp for the spindles of the machine tools for the rotating parts - Google Patents

Description

DESCRIPTION COMPLETED WITH COPYRIGHT CERTIFICATE

CZECHOSLOVAK SOCIALISTIC

REPUBLIC (19 ')

/ 22 / Registered 25 05 78/21 / / PV 3399-78 / 195632 01). <B1) (51) lnt. CliB 23 B 5/22 (10) Published on 31 05 79

OFFICE OFFICE

AND DISCOVERIES (45) Released 15 04 8 2 (75)

The inventor

SKOPÁLEK JOSEF dipl. those., GOTTWALDOV (54) Workpiece clamp for machine tool spindles of rotating parts

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece clamp for cutting machine tools of rotary components, comprising a clamping device with a sleeve provided displaceably on a tapered part of a tool spindle clamping body and a positioning device.

The known workpiece holders for spindle-forming machines of rotating parts consist of a clamping device consisting of a clamping body which is part of a machining spindle, on whose conical part a spreader sleeve actuatable by a clamping rod connected to the clamping cylinder rod of the clamping cylinder is disposed. they are further constituted by a positioning device consisting of positioning stops fixed to. the flange is displaceably mounted on the tension rod behind the clamping body, through which these positioning stops pass through into the workpiece space.

After moving the positioning stops, the rear face of the workpiece can also be processed. The disadvantage of the known clamping device is that the flange with positioning stops is of a large diameter so that it is not possible to clamp the workpieces of smaller dimensions. Another known design of the clamp requires clamping the clamps mounted on the conical part of the clamping spindle body. Up to now known jaw-mounted switches do not allow the workpieces to be clamped. It is an object of the present invention to provide a workpiece clamp for machine tool spindles with a rotary component that allows the clamping of a small diameter diameter.

SUMMARY OF THE INVENTION The subject of the invention is a workpiece clamp for machine tool spindles of rotary components, the positioning device of which is formed by support pins mounted in guide holes formed parallel to the axis of the frame clamp of its support body and provided with projections facing the expansion sleeve positioning stops and on opposite sides of the transverse notches for the drive head of the housing. in the cylindrical hole of the machining spindle and connected to the piston rod of the clamping cylinder, the width of the transverse notches being greater than the width of the discharge head by at least the value of the minimum axial movement of the expansion sleeve required to release the workpiece, while the depth of the cylindrical recess for the drive head in the support body and the distance between the shoulder of the collar in the base position of the clamp are greater than the width of the machining tool for machining the workpiece butt; It is also essential that a precise hole is formed in its housing in the direction perpendicular to its longitudinal axis, the opposite part of the contour circle being in the basic position of the clamp in the tangent with the plane passing through the collar face.

The progress made by the clamp according to the invention results in the fact that the back face can be machined even on small workpieces which are perfectly accurate on the expansion sleeve. Since the movement of the expansion sleeve is limited by the clamping device, undesired permanent deformations are avoided during the clamping operation. Accordingly, the clamping device according to the invention can be used on modern machine tool rotary cutting components, and the invention is also advanced in that its basic positioning is ensured by a precise opening in the housing. 1 95632 passes through the exact hole

Claims (2)

195632 3 a caliber mandrel to which the collar face arrives, thereby providing the fixture with a basic position. In the accompanying drawing, a workpiece clamp is shown schematically as an example of a guide according to the invention. In the drawing, the longitudinal section of the fixture is guided by a plane passing through the longitudinal axis. In the shoulder of the spindle 6 there is a screw-fastening body 2 with a conical part 3 'which is a supporting part of the clamping device of the workpieces. Furthermore, the clamping device consists of a release sleeve 6 displaceably disposed on the conical portion 3. The expansion sleeve is connected with its one end by a clamping rod 5 which is screwed by its second end into the threaded bore of the collar 6, and this connection is positively secured by a bore screw 7 with a shim 8. on the other hand, in the cylindrical recess 20 of the head of the connecting screw 2 1 screwed into the piston rod 22 of the clamping cylinder and the head provided with a thread in the threaded opening of the housing 12 between the collar face 32 and the bottom of the cylindrical opening of the housing 9, a screw spring 10 is provided, in which the precision hole 31 is formed in the housing 6 in the direction perpendicular to its longitudinal axis, which in its basic position of the clamping device is in its tangential contact with the plane passing 32 of the collar 6, the housing 2 by its facing part of the contour circle. provided on the one side with a driving head 11, which is in the transverse direction the slots 12 provided on one side of the bearing pins 13 constituting the locating means and mounted in guide holes 14 formed parallel to the sliders on the periphery of its support body 8. On the other hand, facing the expander 14, positioning steps 15 formed in an exemplary embodiment of the head and locking nut 16 are fastened. The width 6 of the transverse notches 12 in the support pins 13 is greater than the width of the carrier head 11, at least by the movement value of the expansion sleeve 6 required to release the workpiece 17, in an exemplary embodiment, is at least 0.6 mm. The depth h of the cylindrical recesses 18 in the support body 6 and the distance bottom of the recess 19 in the housing 6 from the front of the collar 6 before clamping are greater than the width β of the machining tool 30 for the back face 17. In the support body 8, perpendicular to the support pin 13, in a plane through its longitudinal axis, a positioning pin 23 is provided with a cavity 24 in which a compression screw spring 25 is supported by its one end by the bottom of the cavity 24 and by the other end by the bottom of the hollow x. A workpiece clamp for machine tool spindles of rotating components, comprising a clamping device with an expansion housing displaceable on a conical portion of a clamping support body and a positioning device by displaceable stops, characterized in that the positioning device is formed by support pins (13) mounted in the guide openings (14) (formed parallel to the axis of the clamp) of the periphery of its support body (2) and opener on the faces facing the expansion sleeve (4) by positioning stops (15) and on the opposite sides by transverse notches (12) flowing head (11) of the housing (9) through the cylindrical opening a machining spindle (1) of a screw (26) screwed in the threaded opening (27) of the support body (2) and the limiting movement of the positioning pin (23), the pin (23) of the wedge end which extends into the longitudinal groove (28) formed in the support pin (33a) terminated by the positioning recess (29) When released CONTRARY TO pístnice22 workpiece pushes the clamping bolt 2 cylinder housing 1 in advance. Before the front end of the piston rod 22, the movement of the sleeve 2 is stopped by the bottom of the cylindrical recess 18 in the support body and at the same time the movement of the support pin 13 with the positioning stop 15 and the moving pulling rod 5 is stopped, which releases the expansion sleeve 9, thereby. the clamp is ready to remove the finished workpiece 17 and slide another one. When the piston rod workpiece 17 is biased, the connecting screw 21 with the sleeve 2 and the screw spring 10 and the collar 6 of the clamping sleeve 6 with the expansion sleeve 6 are clamped, the workpiece 17 being clamped by a force derived from the screw spring 20. The positioning stop 5 with the support pin 13 remains in the front extreme position by engaging the wedge end of the positioning pin 23 in the positioning device 29. To open the expansion sleeve 6, the upper limit of the opening of the workpiece 17 is sufficient, on the clamping device according to the invention, the axial movement of the tension rod 16. value of 0.6 m. During this movement, the positioning stop 15 remains in the frontmost position, since the transverse notch 62 is wider by 1 mm, in the clamp according to the invention, than the driving head 11 of the housing 21 which pulls the support pin 13 with the positioning stop 15 after pushing the positioning pin 23 is a rear end position and a gap is required for the tool for machining the rear end of the workpiece. After pretensioning the workpiece 17, the tension rod 2 remains »the expansion sleeve 6 and the sleeve 6. The sleeve continues to move and compresses the helical spring 20 so that the prestressing force of the workpiece 7 increases. After the bottom of the opening of the housing 2 has been seated on the entire ring 6, the workpiece is clamped by the bearer derived from the clamping roller. When the clamp is engaged without the workpiece 17, the clamping rod 2 only moves a short time and stops at the front of the support body 2. The expansion sleeve opens only to the specified value and is not subjected to stress so that there is no risk of its safety. permanent deformation. There remains free space for the working tool, since the travel of the expansion sleeve 4 is limited and the positioning stop 15 is inserted into the carrier body 6. When adjusting the clamp to the base position, a calibrated mandrel is inserted through the precision hole 31, to which the collar face 32 arrives, and thus the base position of the clamp is set. YNALEZ and connected to the piston rod (22) of the chuck, wherein the width (t) of the transverse notches (12) is greater than the width (g) of the drive head (11) by at least the minimum axial displacement of the expander sleeve (4) the workpiece (17), while the depth (h) of the cylindrical recess (18) for the driving head (11) in the support body (2). and a distance / hi / bottom of the shoulder (19) in the housing (9) of the face ring (6) in the base position of the clamp is greater than the width (w) of the machining tool (30) for machining the rear face of the workpiece (17). 2. Clamp according to claim 1, characterized in that a precision hole (31) is formed in its housing (9) in the direction perpendicular to its longitudinal axis, the opposite part of which is formed. the contour circle is in the basic position of the clamp in tangential contact with the plane passing through the face / 32 / shoulder / 6 /, x 1 sheet of drawings Severografia, n.