CN-116493973-B - Frock clamp with rotation function

CN116493973BCN 116493973 BCN116493973 BCN 116493973BCN-116493973-B

Abstract

The invention discloses a tool clamp with a rotating function, which comprises a base and a turntable positioned with a rotation center, wherein the turntable can rotate along the rotation center on the base, a clamping device for fixing a workpiece is arranged on the turntable, an elastic supporting device capable of driving the turntable to lift is arranged between the base and the turntable, the elastic supporting device comprises a rolling piece capable of providing rolling friction for the rotation of the turntable, a locking device capable of pressing the turntable on the base and driving the rolling piece to retract into the elastic supporting device is arranged between the turntable and the base, and the tool clamp adopting the technical scheme is characterized in that the elastic supporting device is arranged between the turntable and the base, the elastic supporting device provides support for the turntable and provides rolling friction when the turntable rotates, and in a locked state of the turntable, the elastic supporting device is compressed to enable the turntable and the base to be in opposite plane contact, so that the turntable is locked reliably and the flatness can be ensured.

Inventors

ZHANG DONGTAO
LIANG YUWEN
LIU CHUNYING
ZHENG XIAOWEI
LUO CHANGYU

Assignees

宝鸡忠诚机床股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230419

Claims (4)

1. The tool clamp with the rotating function comprises a base (1) and a turntable (2) with a positioned rotation center, wherein the turntable (2) can rotate along the rotation center on the base (1), a clamping device (3) for fixing a workpiece is arranged on the turntable (2), and the tool clamp is characterized in that an elastic supporting device (4) capable of driving the turntable (2) to lift is arranged between the base (1) and the turntable (2), the elastic supporting device (4) comprises a rolling piece (4-1) capable of providing rolling friction for the rotation of the turntable (2), and a locking device (5) capable of pressing the turntable (2) on the base (1) and driving the rolling piece (4-1) to retract into the elastic supporting device (4) is arranged between the turntable (2) and the base (1), and the bottom surface of the turntable (2) is pressed and attached to the top surface of the base (1) after the elastic supporting device (4) is compressed; The elastic supporting device (4) is arranged on the rotary table (2) or the base (1), an installation groove (9) for embedding the elastic supporting device (4) is formed in the rotary table (2) or the base (1), the elastic supporting device (4) comprises an elastic piece (4-2), the rolling piece (4-1) is a plane bearing, the axis of the plane bearing is coaxial with the rotary center of the rotary table, the elastic supporting device (4) is circumferentially provided with a group along the rotary center, the elastic supporting device (4) comprises an installation sleeve (4-3), a movable sleeve (4-4) for installing the rolling piece (4-1) is arranged in the installation sleeve (4-3) in a floating mode, the elastic piece (4-2) for driving the movable sleeve (4-4) to extend out of the movable sleeve (4-4) is arranged in the installation sleeve (4-3), an adjusting piece (4-5) for adjusting the compression amount of the elastic piece (4-2) is arranged on the installation sleeve (4-3), and the movable sleeve (4-3) is provided with a limiting piece (4-4) extending out of the movable sleeve (4-4).
2. The fixture with the rotating function according to claim 1 is characterized in that a positioning structure for positioning the rotating angle of the turntable (2) is further arranged between the turntable (2) and the base (1), and the positioning structure (6) is a pin hole and a pin or a key groove and a key.
3. The fixture with the rotating function according to claim 1, wherein the locking device (5) is a shaft, a pressing block and a nut which are arranged in the center of the turntable (2), the turntable is sleeved on the shaft and takes the shaft as a rotation center, the pressing block and the nut are arranged at the top of the shaft, and the turntable (2) is locked with the base (1) by locking the nut.
4. The fixture with the rotating function according to claim 1, wherein the locking device (5) comprises a group of pull rods (5-1), pressing blocks (5-2) which are arranged on the circumference of the base (1) are arranged on the pull rods (5-1), nuts (5-3) which drive the pressing blocks (5-2) to be folded are connected to the pull rods (5-1) in a threaded mode, a linkage piece (5-4) is hinged between the pull rods (5-1), buckling parts (5-5) are arranged at two ends of the pressing blocks (5-2), buckling grooves (5-6) which are matched with the buckling parts (5-5) are formed in the rotary table (2) and the base (1), and at least one buckling groove (5-6) which is wedge-shaped and matched with the wedge-shaped buckling part (5-5) is provided with an inclined surface.

Description

Frock clamp with rotation function Technical Field The invention relates to a fixture. Background The fixture provides clamping for parts in machining so as to facilitate equipment machining, some parts need to machine a plurality of surfaces of the parts in general lathe machining, the workpiece is required to be continuously clamped to adjust the position of the workpiece so that the surface to be machined of the workpiece is located at the machining position when the traditional fixture is adopted for machining, the workpiece is subjected to secondary clamping, errors are easy to occur, and the clamping process is time-consuming and labor-consuming, so that the fixture with a rotation function is designed for the workpiece which needs to be subjected to the plurality of surface machining, the position of the surface to be machined of the workpiece is adjusted through the rotary turntable, the traditional turntable is inconvenient to operate due to large resistance in rotation caused by frictional contact between the turntable and the base, the rotation smoothness of the turntable is required to be improved, the multi-station milling rotary fixture disclosed in patent 201620519683.6 comprises a fixed base and a rotary table, and the rotary table is arranged on the fixed base through a bearing and a rotary pin, and the rotary resistance of the rotary table is reduced, but the rotary table is unstable in locking and difficult to be leveled due to the fact that the bottom surface of the rotary table is not contacted with the top surface of the fixed base. Disclosure of Invention In order to solve the problems of large rotation resistance of a turntable and unstable locking state of the turntable and a base in the prior art, the invention adopts the following technical scheme: The utility model provides a frock clamp with rotation function, includes the base and is fixed a position the revolving stage at the center of revolution, the revolving stage on the base can follow the center of revolution rotation the revolving stage on be provided with the clamping device of fixed work piece base and revolving stage between be provided with the elastic support device that can order about the revolving stage lifting, elastic support device including can provide rolling friction's rolling element for the revolving stage rotation be provided with between revolving stage and the base and compress tightly the revolving stage on the base and order about the locking device in the rolling element withdrawal elastic support device. Furthermore, a positioning structure for positioning the rotation angle of the turntable is also arranged between the turntable and the base, and the positioning structure is a pin hole and a pin or a key slot and a key. Further, the elastic supporting device is arranged on the rotary table or the base, and the rotary table or the base is provided with an installation groove for embedding the elastic supporting device. Further, the elastic supporting device comprises an elastic piece, the rolling piece is a plane bearing, and the axis of the plane bearing is coaxial with the rotation center of the turntable. Further, the elastic supporting device is circumferentially provided with a group along the rotation center, the elastic supporting device comprises a mounting sleeve, a movable sleeve for mounting rolling elements is arranged in the mounting sleeve in a floating mode, an elastic element for driving the movable sleeve to extend out of the movable sleeve is arranged in the mounting sleeve, an adjusting element for adjusting the compression amount of the elastic element is arranged on the mounting sleeve, and a limiting element for limiting the extending length of the movable sleeve is arranged on the mounting sleeve. Further, the locking device is a shaft and a pressing block which are arranged in the center of the turntable. Further, the locking device comprises a group of pull rods, pressing blocks arranged on the circumference of the base are arranged on the pull rods, nuts for driving the pressing blocks to be folded are connected to the pull rods in a threaded mode, a linkage piece is hinged between the pull rods, buckling parts are arranged at two ends of the pressing blocks, buckling grooves matched with the buckling parts are formed in the rotary table and the base, and at least one buckling part is wedge-shaped and is provided with an inclined plane. By adopting the technical scheme, the elastic supporting device is arranged between the turntable and the base, so that the elastic supporting device supports the turntable and provides rolling friction when the turntable rotates, and the elastic supporting device is compressed to enable the opposite planes of the turntable and the base to be in contact under the locked state of the turntable, so that the turntable is reliably locked, and the flatness can be ensured. Drawings FIG. 1 is a schematic diagram of the structure of the present inv