DE102016010747A1 - Plan chuck - Google Patents

Abstract

The invention relates to a surface chuck with a base body (1), with clamping jaws (6) and with a first clamping plate (8), wherein the base body (1) about a spindle axis (2) is rotatable, wherein a workpiece (12) in the radial direction relative to the spindle axis (2) is centered, wherein the workpiece (12) of the first clamping plate (8) on a plane support (13) is fixable, wherein a second clamping plate (14) is provided, with which the workpiece (12) also on the Plane support (13) can be fixed.

Description

The invention relates to a surface chuck for clamping thin-walled workpieces. From the DD 250 274 A1 a drawbar-operated plan clamping device is known. In the open position, the drawbar unlocks a centering mandrel, which then moves by a preloaded spring in a centering position. After the workpiece has been centered on the conical tip of the centering mandrel, this can be pushed back with an additional device in a detent position, so that the workpiece is machined in the centering.

It is the object of the present invention to provide a surface chuck with increased clamping accuracy.

This object is achieved with a surface chuck according to claim 1. Advantageous developments are the subject of the dependent claims. According to an advantageous aspect of the invention, two replaceable clamping plates are provided for fixing the workpiece, which cause a high-precision workpiece clamping and at the same time allow machining on the inner and outer surfaces.

The invention will be described in more detail below with reference to an exemplary embodiment.

1 shows the cross section of a surface chuck with a first clamping plate

2 shows a section of the surface chuck 1 with a second clamping plate

1 shows the cross section of a surface chuck. This rotates about the spindle axis 2 , The main body 1 takes an outer tie rod 3 three on. This is about rocker arm 5 with jaws 6 in connection. By moving the outer pull rod 3 can the jaws 9 be moved between an open and a closed position back and forth. In the closed position is a workpiece 12 in the radial direction relative to the spindle axis 2 centered. Inside the outer drawbar 3 is the inner pull rod 4 arranged. The wave 11 is in the drawbar 4 bolted and in the axis of rotation 2 position-oriented. About a bayonet connection in the shaft 11 and in the clamping plate 8th can the clamping plate 8th be arrested. The locking takes place by a rotational movement of the body 1 , The workpiece 12 comes with a vertical movement from the first clamping plate 8th against the plan edition 13 pressed. On the right side of the main body 1 is a coupler pocket 9 on a cylinder 10 shown. Their function will be on hand 2 described in more detail. 2 shows the arrangement of the second clamping plate 14 that with coupling bolts 15 in the clutch receptacles 9 is locked. The locking takes place by a rotational movement of the body 1 , Similar to the first clamping plate 8th can also be the second clamping plate 14 be taken in a parking position and stored again. Particularly advantageous, the first 8th and second clamping plate 14 at the same time on the workpiece 12 be engaged, so that the workpiece remains fixed even when changing the clamping plate in the original position.

LIST OF REFERENCE NUMBERS

1

body

2

spindle axis

3

External pull rod

4

Inner drawbar

5

rocker arm

6

jaw

7

thread

8th

First clamping plate

9

Kupplungsaufnahme

10

cylinder

11

wave

12

workpiece

13

plan edition

14

Second clamping plate

15

coupling pin

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DD 250274 A1 [0001]

Claims (8)

Plan chuck with a basic body ( 1 ), with clamping jaws ( 6 ) and with a first clamping plate ( 8th ), the basic body ( 1 ) about a spindle axis ( 2 ) is rotatable, wherein a workpiece ( 12 ) in the radial direction relative to the spindle axis ( 2 ) is centerable, wherein the workpiece ( 12 ) of the first clamping plate ( 8th ) on a plan edition ( 13 ) is fixable, characterized in that a second clamping plate ( 14 ) is provided, with which the workpiece ( 12 ) also on the plan edition ( 13 ) is fixable. Plan chuck according to claim 1, characterized in that the clamping jaws ( 6 ) with an outer tie rod ( 3 ) to the workpiece ( 12 ) are deliverable. Plan chuck according to claim 2, characterized in that the workpiece ( 12 ) by a movement of an inner tie rod ( 4 ) with the first clamping plate ( 8th ) against the plan edition ( 13 ) is pressable. Plan chuck according to claim 3, characterized in that the workpiece ( 12 ) with the second clamping plate ( 14 ) against the plan edition ( 13 ) is pressable. Plan chuck according to claim 3, characterized in that the second clamping plate ( 14 ) with a cylinder ( 10 ) is operable. Plan chuck according to one of the claims 3 to 5, characterized in that the first clamping plate ( 8th ) and the second clamping plate ( 14 ) are automatically interchangeable. Plan chuck according to claim 6, characterized in that the first clamping plate ( 8th ) and the second clamping plate ( 14 ) by rotation of the basic body ( 1 ) around the spindle axis ( 2 ) can be locked and released. Plan chuck according to one of the preceding claims, characterized in that the first clamping plate ( 8th ) and the second clamping plate ( 14 ) at the same time on the workpiece ( 12 ) are engageable.

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