CN109551267B

CN109551267B - Centering pressing device

Info

Publication number: CN109551267B
Application number: CN201811190665.8A
Authority: CN
Inventors: 熊华强; 彭思潇; 肖斌; 严植; 钟宏伟; 朱向松; 彭冲
Original assignee: Jiangxi Changhe Aviation Industries Co Ltd
Current assignee: Jiangxi Changhe Aviation Industries Co Ltd
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2021-04-30
Anticipated expiration: 2038-10-12
Also published as: CN109551267A

Abstract

The invention belongs to the field of machine tool clamps, and particularly relates to a centering and pressing device. When the clamp needs to be positioned and compressed by an inner circle and a shoulder, a plurality of positioning and clamping devices need to be operated in a common clamp, and certain waste of production preparation time and labor intensity is caused. According to the centering and pressing device, the pull rod is arranged in the through hole of the bottom plate, the part of the pull rod at the upper end of the bottom plate is provided with an expanded end part, the inner sides of openings at two ends of the double-end expansion sleeve are provided with expanded inclined planes, the openings at two ends are provided with grooves extending along the axial direction, and the rotation of the pull rod is limited in the bottom plate through the matching of the pin and the axial grooves of the pull rod; the lower end of the bottom plate of the pull rod penetrates through the transmission plate and then is sequentially connected with the spherical washer and the knurled nut; the transmission plate is provided with a plurality of groups of pressing components around the pull rod, the pressing plate is rotatably supported, and the outer side of the pressing plate is jacked up through a mandril hinged with the transmission plate, so that the workpiece is pressed. The two steps of positioning and compressing are simultaneously realized through one-step operation, so that time and labor are saved.

Description

Centering pressing device

Technical Field

The invention belongs to the field of machine tool clamps, and particularly relates to a centering and pressing device which can be used for quickly positioning and pressing a workpiece.

Background

In the positioning of machining, when the inner circle and the shoulder are required to be positioned and pressed, the inner circle is required to be positioned and the shoulder is required to be pressed. However, in the conventional clamp, a plurality of positioning and clamping devices are required to be operated, so that certain waste of production preparation time and labor intensity is caused.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in a machine tool clamp, positioning and pressing devices are required to be designed in parts needing to be positioned and pressed by an inner circle and a shoulder respectively, and the parts are required to be operated respectively to realize positioning and pressing in use, so that the parts are complex.

A centering and pressing device is used for synchronously centering and pressing a workpiece in the circumferential direction, a pull rod is arranged in a through hole of a bottom plate, the upper end of the pull rod is provided with an enlarged end part, the inner sides of openings at two ends of a double-end expansion sleeve are provided with enlarged inclined planes, grooves extending along the axial direction are arranged at the openings at the two ends, the double-end expansion sleeve is sleeved at the upper part of the pull rod, a top block is arranged in a gap between the pull rod and the lower end part of the double-end expansion sleeve, and the top block is provided with an inclined plane matched with the inclined plane at the lower end of the; the rotation of the pull rod is limited in the bottom plate through the matching of the pin and the axial groove of the pull rod; the lower end of the bottom plate of the pull rod penetrates through the transmission plate and then is sequentially connected with the spherical washer and the knurled nut; the driving plate is provided with a plurality of groups of pressing components around the pull rod, and the pressing components comprise pressing plates which are rotatably supported and are jacked up by ejector rods hinged with the driving plate on the outer sides of the pressing plates so as to press the workpiece through the inner side ends of the pressing plates.

The pressing assembly supports the pressing plate in the middle area of the pressing plate through the stud bolts, one end of each stud bolt is connected with the bottom plate, and the other end of each stud bolt penetrates through the kidney-shaped groove of the pressing plate to be connected with the nut.

The stud bolts are sleeved with springs which provide upward pressure to the pressure plate through gaskets.

The position of the platen is controlled by pushing or pulling it laterally.

The matching area of the transmission plate and the spherical washer is an inclined plane.

The number of the pressing assemblies is more than 3 groups, and the pressing assemblies are uniformly distributed on the same circumference.

Before compression, a workpiece is sleeved on the double-end expansion sleeve, the pressing plate is transversely pushed to enable the inner end of the pressing plate to be lapped on a peripheral structure of the workpiece, and the knurled nut is rotated to realize synchronous centering compression on the workpiece.

Has the advantages that: can realize location and compress tightly two steps simultaneously through one-step operation, labour saving and time saving.

Drawings

FIG. 1 is an oblique view of the centering hold-down device of the present invention;

FIG. 2 is a cross-sectional view of the centering compression device of the present invention;

FIG. 3 is a schematic view of the structure of the tie rod;

figure 4 is a schematic diagram of a double ended expansion sleeve.

Detailed Description

A workpiece 13 is initially positioned on the bottom plate 8 through the idle double-end expansion sleeve 2, the pressing plate 6 is transversely pushed to a working position, the pull rod 1 and the transmission plate 9 are forced to move oppositely by rotating the knurled nut 12, when the pull rod 1 moves downwards, the pull rod 1 and the ejector block 3 can be forced to expand the double-end expansion sleeve 2 together due to the fact that the upper end of the pull rod 1 is matched with the outer side of the ejector block 3 and the inclination of the inner part of the double-end expansion sleeve 2, and the double-end expansion sleeve 2 is used for centering and positioning the workpiece 13; meanwhile, the transmission plate 9 moves upwards to drive the ejector rod 7 to move upwards and push the outer end of the pressing plate 6, and the inner end of the pressing plate 6 is forced to press the workpiece 13 due to the fulcrum function of the matching of the stud bolt 4 and the nut. The loosening is achieved by reversing the rotation of the knurled nut 12.

The spring 5 and the washer 14 ensure that the inner end of the pressure plate 6 keeps a certain height when the pressure plate is unloaded, and the pressure plate 6 is convenient to rapidly and transversely push in and pull out. The matching surfaces of the transmission plate 9 and the spherical washer 11 are conical surfaces, the transmission plate 9 can have a certain rotating space on the spherical washer 11, and the pressing force for pressing the four pressing plates 4 is the same. The pin 10 prevents the rotation of the pull rod 1.

Claims

1. The utility model provides a centering closing device for to the work piece compress tightly at the synchronous centering of circumference which characterized in that: the device is characterized in that a pull rod (1) is arranged in a through hole of a bottom plate (8), the pull rod (1) is provided with an expanded end part at the upper end of the bottom plate (8), the inner sides of openings at two ends of a double-end expansion sleeve (2) are provided with expanded inclined planes, the openings at two ends are provided with grooves extending along the axial direction, the double-end expansion sleeve (2) is sleeved at the upper part of the pull rod (1), a top block (3) is arranged in a gap between the lower ends of the pull rod (1) and the double-end expansion sleeve (2), and the top block (3) is provided with an inclined plane matched with the inclined plane at the lower end of the double; the rotation of the pull rod (1) is limited in the bottom plate (8) through the matching of a pin (10) and an axial groove of the pull rod (1); the lower end of the bottom plate (8) of the pull rod (1) penetrates through the transmission plate (9) and then is sequentially connected with the spherical washer (11) and the knurled nut (12); the transmission plate (9) is provided with a plurality of groups of pressing components around the pull rod (1), the pressing components comprise pressing plates (6), the pressing plates (6) are rotatably supported and are jacked up at the outer sides of the pressing plates through mandrils (7) hinged with the transmission plate (9), and therefore workpieces (13) are pressed through the inner side ends of the pressing plates; the pressing assembly supports the pressing plate (6) in the middle area of the pressing plate (6) through the stud bolt (4), one end of the stud bolt (4) is connected with the bottom plate (8), and the other end of the stud bolt penetrates through a kidney-shaped groove of the pressing plate (6) and is connected with the nut; the stud bolts (4) are sleeved with springs (5) which provide upward pressure to the pressure plate (6) through gaskets (14); the position of the pressure plate (6) is controlled by pushing or pulling it laterally.

2. The centering and pressing device according to claim 1, wherein: the matching area of the transmission plate (9) and the spherical washer (11) is an inclined plane.

3. The centering and pressing device according to claim 1, wherein: the number of the pressing assemblies is more than 3 groups, and the pressing assemblies are uniformly distributed on the same circumference.

4. A centering and pressing device according to any one of claims 1-3, characterized in that: before compression, a workpiece (13) is sleeved on the double-end expansion sleeve (2), the pressing plate (6) is pushed transversely to enable the inner end of the pressing plate to be lapped on the peripheral structure of the workpiece (13), and the knurled nut (12) is rotated to realize synchronous centering compression on the workpiece (13).