CN-119794855-B - Axial positioning and compressing device for rotary workpiece

Abstract

The invention provides an axial positioning and compressing device for a rotary workpiece. The clamping device solves the problems that the clamping stability of the existing thin-wall workpiece is insufficient, the thin-wall workpiece is easy to move in the machining process, and the machining quality is affected. According to the invention, the workpiece is pressed against the rotating disc by the fluid sprayed by the spray head on the fluid pressure disc to finish the fixing of the workpiece, so that the workpiece is more firmly installed, deformation can not occur, and meanwhile, the overturning moment generated during processing can be resisted under the condition that the height of the radial positioning device installed on the rotating disc is very low.

Inventors

• PAN XUHUA

Assignees

• 浙江亚微精密机床有限公司

Dates

Publication Date

20260508

Application Date

20231009

Claims (4)

1. 1. The axial positioning and pressing device for the rotary workpiece is arranged on a machine tool, a radial positioning device (4) for positioning the workpiece is arranged on a main shaft (1) of the machine tool, and the axial positioning and pressing device is characterized by comprising a rotary disc (2) which is arranged on the main shaft (1) of the machine tool and is perpendicular to the axis of the main shaft (1), a fluid pressure disc (5) which can be fixedly arranged relative to the machine tool is arranged on the machine tool body, the workpiece is positioned between the rotary disc (2) and the fluid pressure disc (5), a certain gap is reserved between the fluid pressure disc (5) and the workpiece, a plurality of spray heads (6) are arranged on the fluid pressure disc (5), the fluid is sprayed to the end face of the workpiece to press the rotary disc (2), a notch for a cutter to enter the fluid pressure disc (5) to cut the interior of the workpiece is formed in the axial positioning device, the fluid pressure disc (5) is of a C type, the fluid pressure disc (5) is arranged on the machine tool body through a connecting rod (13) which is movably arranged on the machine tool, the fluid pressure disc (5) can be abutted against the two positioning blocks (7) along the length (7) of the main shaft (1) along the radial positioning and the positioning blocks (7) are arranged on the positioning blocks, the rotary disc (2) is provided with a pressing block (8) for pressing a workpiece against the positioning block (7), the positioning block (7) and the pressing block (8) are respectively positioned at the inner side and the outer side of the workpiece, the pressing block (8) is provided with a pressing surface (14) contacted with the workpiece, one side of the pressing block (8) is provided with a driving mechanism (9) for driving the pressing block (8) to move, the driving mechanism (9) comprises a guide block (10) fixedly arranged on the rotary disc (2), the guide block (10) is movably provided with a guide rod (11), one end of the guide rod (11) is fixedly arranged on the pressing block (8), the guide rod (11) is sleeved with a spring (12) for driving the pressing block (8) to move away from the guide block (10), the rotary disc (2) is fixedly provided with a base (15), one side of the base (15) facing the workpiece is movably provided with a wedge block (16), the pressing block (8) is fixedly arranged on the end face of the wedge block (16) facing one side of the workpiece, one side of the wedge block (16) is fixedly arranged on the spring (12) and is abutted against the wedge block (16), the wedge block (16) is positioned on the guide rod (16) and is positioned on the wedge block (16), a push rod (17) for driving the inclined wedge block (16) to move towards the direction of the spring (12) is arranged on the machine tool.
2. 2. An axially positioned pressing device for rotating workpieces according to claim 1, characterized in that the spray heads (6) are uniformly distributed on the end face of the fluid pressure disc (5) facing the side of the main shaft (1).
3. 3. The axial positioning and compressing device for rotating workpieces according to claim 1, wherein the rotating disc (2) is a sucker, and the radial positioning device (4) comprises a plurality of pressing blocks (8) arranged on the periphery of the workpiece.
4. 4. A rotary workpiece axial positioning and compacting device according to claim 1, characterized in that the driving mechanism (9) is a cylinder or an oil cylinder.

Description

Axial positioning and compressing device for rotary workpiece Technical Field The invention relates to the technical field of machining, in particular to an axial positioning and compressing device for a rotary workpiece. Background Machining of annular workpieces, in particular annular workpieces, is often encountered in machining. For this annular workpiece, a three-jaw chuck is usually used for clamping, but the jaws of the three-jaw chuck easily deform the workpiece when clamping the annular workpiece. Therefore, people begin to use the sucking disc to adsorb the terminal surface of annular work piece and process, but the sucking disc is not enough to many annular work pieces's adsorption area, namely its area of contact with the terminal surface of annular work piece is less, lead to the area of force less for annular work piece's centre gripping stability is insufficient, annular work piece is easy to remove in the course of working, influence processingquality, when annular work piece needs the processing of inside and outside circle simultaneously, press from both sides tight or location part height need fall very low, otherwise can interfere with the cutter emery wheel of processing, at this moment work piece processing has great subversion moment, so the existing technology is difficult to implement, the prior art exists the modifiable place. Disclosure of Invention The invention provides a rotary workpiece axial positioning and compressing device which is arranged on a machine tool and is characterized in that the axial positioning and compressing device comprises a rotating disc which is arranged on the machine tool spindle and is perpendicular to the axis of the spindle, a fluid pressure disc which can be fixedly arranged relative to the machine tool body is arranged on the machine tool body, a workpiece is positioned between the rotating disc and the fluid pressure disc, a certain gap is reserved between the fluid pressure disc and the workpiece, and a plurality of spray heads are arranged on the fluid pressure disc to spray fluid to the end face of the workpiece and then press the workpiece against the rotating disc. Preferably, the fluid pressure disc is provided with a notch for the cutter to enter the fluid pressure disc to cut the inside of the workpiece, and the fluid pressure disc is C-shaped. Preferably, the nozzles are uniformly distributed on an end surface of the fluid pressure disk facing the main shaft. Preferably, the fluid pressure disc is mounted on the machine tool by a connecting rod movably provided on the machine tool, and the fluid pressure disc can be adjusted in position along the length direction of the main shaft by the connecting rod. Preferably, the radial positioning device comprises two positioning blocks fixedly arranged on the rotary disk, the positioning blocks are abutted against the workpiece, the rotary disk is provided with pressing blocks for pressing the workpiece against the positioning blocks, and the positioning blocks and the pressing blocks are respectively positioned on the inner side and the outer side of the workpiece. Preferably, the rotating disc is a sucking disc, and the radial positioning device comprises a plurality of pressing blocks arranged on the periphery of the workpiece. Preferably, the pressing block is provided with a pressing surface which is contacted with the workpiece, and one side of the pressing block is provided with a driving mechanism for driving the pressing block to move. Preferably, the driving mechanism comprises a guide block fixedly arranged on the rotating disc, a guide rod is movably arranged on the guide block, one end of the guide rod is fixedly arranged on the pressing block, a spring for driving the pressing block to move away from the guide block is sleeved on the guide rod, a base is fixedly arranged on the rotating disc, an inclined wedge is movably arranged on one side of the base, facing to the workpiece, of the base, the pressing block is fixedly arranged on the end face, facing to the workpiece, of the inclined wedge, the spring is positioned above the inclined wedge, the spring abuts against the inclined wedge, a certain gap is reserved between the guide rod and the inclined wedge, and a push rod for driving the inclined wedge to move towards the spring is arranged on the machine tool. Preferably, the driving mechanism is a cylinder or an oil cylinder. Compared with the prior art, the workpiece is fixed by pressing the workpiece against the rotating disc through the fluid sprayed by the spray head on the fluid pressure disc, the workpiece is more firmly installed, deformation cannot occur, and meanwhile, the overturning moment generated during machining can be resisted under the condition that the height of the radial positioning device installed on the rotating disc is very low. Drawings FIG. 1 is an overall structural view of the present invention; FIG. 2 is an overall structural view of a fluid pressur