CN110814794A

CN110814794A - Hydraulic clamp

Info

Publication number: CN110814794A
Application number: CN201911170082.3A
Authority: CN
Inventors: 戴野; 温万健; 尹相茗; 王刚
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-02-21

Abstract

The invention discloses a hydraulic clamp, which comprises a clamping mechanism, wherein the clamping mechanism is fixedly connected with a rotating shaft through a screw, the clamping mechanism comprises a spring piece and a friction plate, and the friction plate is fixed at one end of the spring piece; when the five-axis swinging head moves to a proper position, the motor of the rotating shaft stops rotating and brakes the rotating shaft, then hydraulic oil pushes the hydraulic top ring to move and apply force on the friction plate, meanwhile, the clamp shell also applies reaction force on the friction plate to generate larger friction force to act on the rotating shaft, and the rotating shaft cannot rotate due to larger cutting force during machining; when the cutting at the position is finished, the oil supply is stopped, the suction force of the resetting strong magnetic ring and the force of the deformation and the recovery of the spring piece enable the hydraulic top ring to reset and loosen the friction plate, and the motor drives the rotating shaft to rotate to adjust the position of the cutter to process the next position conveniently.

Description

Hydraulic clamp

Technical Field

The invention relates to the technical field of milling, in particular to a hydraulic clamp.

Background

The five-axis swinging head is a device for controlling two axial rotations of a cutter in a five-axis machine tool, is a key component of the five-axis machine tool, is used for adjusting the angle of the cutter in the machining process, and needs a clamping mechanism to clamp the rotating shafts in order to ensure that the two rotating shafts do not change after the angles are adjusted when the cutter is machined, so that the five-axis swinging head is ensured not to rotate due to interference of larger cutting force in the whole machining process, and the stability and the machining accuracy of the cutter during cutting are improved.

Most of the existing clamping mechanisms of the five-axis swinging head are produced abroad, the pneumatic inner clamping type is mainly adopted, the metal sheet is elastically deformed by compressed air, and then the rotating shaft is clamped tightly, the inner clamping type depends on elastic deformation, the reliability and the clamping effect are poor, the pneumatic type volume is large, the size of the clamping mechanism is also large, the flexible rotation of the five-axis swinging head is not facilitated, and the defects of high cost, small clamping force, difficult accurate control of the clamping force and the like exist.

Disclosure of Invention

The invention aims to provide a hydraulic clamp, which is used for solving the problems in the prior art, ensuring that a five-axis swing head cannot rotate due to interference of larger cutting force in the whole machining process, reducing the rejection rate of machining and improving the machining precision.

In order to achieve the purpose, the invention provides the following scheme:

a hydraulic clamp, characterized by: comprises a clamping mechanism, the clamping mechanism is fixedly connected with a rotating shaft through a screw, the clamping mechanism comprises a friction plate, a spring piece positioning ring and a spring piece end cover, the friction plate is fixed at one end of the spring leaf, the spring leaf end cover and the spring leaf positioning ring are respectively arranged at the upper side and the lower side of the other end of the spring leaf, and is connected and fixed by a screw, the spring leaf positioning ring is connected with the clamp by a bearing, the bearing is fixed by a bearing end cover, the bearing end cover is arranged on the clamp through an end cover screw, the clamp is fixedly connected with the machine body through a machine body screw, the clamp comprises a clamp end cover and a clamp shell, the clamp shell is fixedly connected with the clamp end cover through a screw, the clamp is characterized in that an oil duct is arranged on the clamp shell, a hydraulic top ring is installed on the clamp shell, and a sealing ring is installed between the hydraulic top ring and the clamp shell.

Preferably, the clamp shell is provided with a reset strong magnetic ring.

Preferably, there is a 0.1mm gap between the hydraulic top ring and the spring plate, and between the friction plate and the clamp end cover.

Compared with the prior art, the invention has the following technical effects:

1. the hydraulic top ring is reset by adopting the reset strong magnetic ring, and the structure is simple.

2. And the spring piece is adopted to assist quick reset.

3. Smaller gaps are reserved between the hydraulic top ring and the spring piece and between the friction plate and the machine body, so that the hydraulic top ring can be clamped and loosened quickly.

Drawings

FIG. 1 is a partial cross-sectional view of a hydraulic clamp;

FIG. 2 is a three-dimensional cross-sectional view of a hydraulic clamp;

FIG. 3 is a cross-sectional view of the hydraulic clamp;

FIG. 4 is a three-dimensional view of a hydraulic clamp;

FIG. 5 is a three-dimensional view of a five-axis yaw;

description of reference numerals: 1. the hydraulic clamp comprises a machine body screw, 2 parts of a clamp end cover, 3 parts of a friction plate, 4 parts of spring pieces, 5 parts of a sealing ring, 6 parts of a hydraulic top ring, 7 parts of a reset strong magnetic ring, 8 parts of a clamp shell, 801 parts of an oil duct, 9 parts of an end cover screw, 10 parts of a bearing end cover, 11 parts of a bearing, 12 parts of a spring piece positioning ring, 13 parts of a spring piece end cover, 14 parts of a machine body, 15 parts of a rotating shaft and 16 parts of a hydraulic clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a hydraulic clamp, which comprises a clamping mechanism, wherein the clamping mechanism comprises a friction plate (3), a spring piece (4), a spring piece positioning ring (12) and a spring piece end cover (13), the friction plate (3) is fixed at one end of the spring piece (4), the upper side and the lower side of the other end of the spring piece (4) are respectively provided with the spring piece end cover (13) and the spring piece positioning ring (12) which are fixedly connected through screws, the spring piece positioning ring (12) is connected with a clamp through a bearing (11), the bearing (11) is fixed through the bearing end cover (13), the bearing end cover (13) is fixed on the clamp through an end cover screw (9), the clamp is fixedly connected with a machine body (14) through a machine body screw (1), the clamp shell comprises a clamp end cover (2) and a clamp shell (8), and the clamp shell (8, an oil duct (801) is formed in the clamp shell (8), a hydraulic top ring (6) is installed on the clamp shell (8), and a sealing ring (5) is installed between the hydraulic top ring (6) and the clamp shell (8).

In the specific embodiment, the reset strong magnetic ring (7) is arranged in the clamp shell, the reset of the hydraulic top ring (6) can be realized, and the structure is simple.

More specifically, the hydraulic top ring (6) and the spring piece (4), and the friction plate (3) and the clamp end cover (2) have a 0.1mm gap, so that the clamping and the loosening can be realized quickly.

When the five-axis swinging head moves to a proper position, the motor of the rotating shaft (15) stops rotating and brakes the rotating shaft (15), then hydraulic oil enters from an oil duct (801) of the clamp shell (8), the hydraulic top ring (5) is pushed, the hydraulic top ring (5) rises from the bottom in the clamp shell (8) and pushes the spring piece (3), and the spring piece (4) deforms; the friction plate (3) is fixed on the spring leaf (4), the deformation of the spring leaf (4) drives the friction plate (3) to contact with the clamp end cover (2) and generate friction, and the rotating shaft (15) is fixedly connected with the clamping mechanism through a screw, so the generated friction force clamps the rotating shaft (15), and the rotating shaft (15) cannot rotate slightly due to large cutting force in the machining process; when the machining at the position is finished, the oil duct (801) stops supplying oil, and the resetting strong magnetic ring (6) has larger magnetic force to attract the hydraulic top ring (5) to descend after no hydraulic pressure exists, so that the resetting of the hydraulic top ring (5) is realized; after the friction plate (3) is loosened, the rotating shaft (15) can rotate along with the motor, and the angle of the cutter is adjusted to process the next position.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. A hydraulic clamp, characterized by: comprises a clamping mechanism, the clamping mechanism is fixedly connected with a rotating shaft through a screw, the clamping mechanism comprises a friction plate, a spring piece positioning ring and a spring piece end cover, the friction plate is fixed at one end of the spring leaf, the spring leaf end cover and the spring leaf positioning ring are respectively arranged at the upper side and the lower side of the other end of the spring leaf, and is connected and fixed by a screw, the spring leaf positioning ring is connected with the clamp by a bearing, the bearing is fixed by a bearing end cover, the bearing end cover is fixed on the clamp through an end cover screw, the clamp is connected and fixed with the machine body through a machine body screw, the clamp comprises a clamp end cover and a clamp shell, the clamp shell is fixedly connected with the clamp end cover through a screw, the clamp is characterized in that an oil duct is arranged on the clamp shell, a hydraulic top ring is installed on the clamp shell, and a sealing ring is installed between the hydraulic top ring and the clamp shell.

2. The hydraulic clamp of claim 1 wherein a reset solenoid is mounted within said clamp housing.

3. The hydraulic clamp of claim 1 wherein there is a 0.1mm clearance between said hydraulic top ring and said spring plate, said friction plate and said clamp end cap.