CN112077631A

CN112077631A - Machining device

Info

Publication number: CN112077631A
Application number: CN202010956985.0A
Authority: CN
Inventors: 刘北; 黄龙; 胡波; 徐晓强; 尹来容
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2020-09-12
Filing date: 2020-09-12
Publication date: 2020-12-15
Anticipated expiration: 2040-09-12
Also published as: CN112077631B

Abstract

A machining device comprising: the device comprises a workbench, a first clamping hydraulic cylinder, a second clamping hydraulic cylinder, a bracket, a driving part, a working head and a feeding hydraulic cylinder; the support is arranged above the workbench, the driving part is suspended at the upper part of the support and drives the working head to process a workpiece, a first clamping hydraulic cylinder is arranged on the left side of the workpiece, and a second clamping hydraulic cylinder is arranged on the right side of the workpiece; the feeding hydraulic cylinder controls the workpiece to move. The hydraulic cylinder comprises a cylinder body, a driving rod, a piston, a guide post, an oil port, a flexible mechanism and a connecting sleeve.

Description

Machining device

Technical Field

The invention relates to the field of application of flexible mechanisms in machining, in particular to a machining device.

Background

The poisson's ratio is a basic parameter for structural deformation, and in common materials, poisson's ratio is generally a positive number, mostly ranging from 0 to 0.5. When a general material is stretched in one direction, its cross section shrinks with the stretching, whereas the cross section of a negative poisson's ratio material (auxetic material) expands with the stretching, such as single crystal sulfide ore, Polytetrafluoroethylene (PTFE) and silica with tetrahedrons.

Inspired by the physical properties of the negative poisson ratio material, researchers at home and abroad design a plurality of different negative poisson ratio structures. When the negative Poisson ratio structure is axially stressed, the negative Poisson ratio structure can simultaneously contract in the axial direction and the radial direction, has better rebound property and fracture resistance, and is widely applied to the aspects of buffering, energy absorption, bearing, explosion prevention, regulation of the space size of a robot and the like. In general, a negative poisson ratio structure is formed by periodically overlapping specially-shaped cells;

the specific deficiencies of prior art flexible mechanisms and structures are as follows:

1. the flexible mechanisms of the prior art, the cells are all complete connections between the individuals, but do not consider the functional differentiation between the cells of different configurations, and if the different cells are used for connection, the connection between the different structural configurations is difficult.

2. The connection between the cells in the prior art is only connection, but the connection is not refined, and the connection rigidity and the support performance cannot be guaranteed.

3. The ribs in the prior art only play a role in increasing the strength, and the stress direction and the bending resistance are not considered at all.

4. When the flexible mechanism in the prior art is applied, the flexible mechanism is additionally connected with a device by virtue of a connecting mechanism, and the adaptability and the detachability are not considered.

5. The hydraulic cylinder flexible structure in the prior art is often just a cushion pad, is easy to damage if thin, has poor effect, and loses space utilization rate if thick.

6. When the flexible mechanism in the prior art is directly used for buffering, no additional guide mechanism is arranged, and unexpected deformation of the flexible mechanism in the offset stress direction is easy to occur.

7. The cell element of the flexible mechanism in the prior art only provides damping force by bending deformation, while the damping force is provided by the deformation force in the linear direction, and the effect is provided by single force.

8. In most of the cells of the flexible mechanism in the prior art, a plurality of same cells are formed by linear superposition, and buffer support with higher strength is difficult to realize.

Disclosure of Invention

In order to overcome the above problems, the present invention proposes a solution to solve the above problems simultaneously.

The technical scheme adopted by the invention for solving the technical problems is as follows: a machining device comprising: the device comprises a workbench, a first clamping hydraulic cylinder, a second clamping hydraulic cylinder, a bracket, a driving part, a working head and a feeding hydraulic cylinder; the support is arranged above the workbench, the driving part is suspended at the upper part of the support and drives the working head to process a workpiece, a first clamping hydraulic cylinder is arranged on the left side of the workpiece, and a second clamping hydraulic cylinder is arranged on the right side of the workpiece; the feeding hydraulic cylinder controls the workpiece to move;

the first clamping hydraulic cylinder, the second clamping hydraulic cylinder and the feeding hydraulic cylinder all comprise: the device comprises a cylinder body, a driving rod, a piston, a guide post, an oil port, a flexible mechanism and a connecting sleeve; the flexible mechanism is in a hollow cylindrical shape, a driving rod is arranged in the cylinder body and connected with the piston, a guide post is arranged on the surface of the piston, and the guide post is combined with or separated from the hollow interior of the flexible mechanism in the motion process of the piston; the surface of the flexible mechanism is provided with a cavity, and the position of the oil port corresponds to the flexible mechanism in a compressed state of the flexible mechanism; the flexible mechanism is arranged in the connecting sleeve;

the compliant mechanism includes a cell, the cell comprising: the first isosceles trapezoid plate, the second isosceles trapezoid plate, the A square block, the B square block, the C square block, the D square block, the first notched flexible hinge, the second notched flexible hinge, the third notched flexible hinge, the fourth notched flexible hinge, the first bending flexible hinge and the second bending flexible hinge;

the first bending type flexible hinge is connected between the square block A and the square block B, the second bending type flexible hinge is connected between the square block C and the square block D, the square block A is connected with the first notched type flexible hinge, the square block B is connected with the second notched type flexible hinge, the square block C is connected with the third notched type flexible hinge, the square block D is connected with the fourth notched type flexible hinge, the first isosceles trapezoid plate is connected between the first notched type flexible hinge and the fourth notched type flexible hinge, the second isosceles trapezoid plate is connected between the second notched type flexible hinge and the third notched type flexible hinge, and the first isosceles trapezoid plate and the second isosceles trapezoid plate extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge and the second bending type flexible hinge; all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;

the flexible mechanism further comprises: the arch top surface, the half square block and the embedded plate are located on the upper portion of the flexible mechanism, the embedded plate is arranged on the lowest portion of the flexible mechanism, and the embedded plate is connected with grooves in the bottoms of the three hydraulic cylinders in a matched mode.

Further, the bottom surfaces of the first isosceles trapezoid plate and the second isosceles trapezoid plate are parallel to each other.

Further, m/n is 4.

Further, the number of the flexible mechanisms is five.

Further, the flexible mechanisms are distributed along the circumference.

Furthermore, the number of the guide posts is five.

Further, the guide posts are distributed along the circumference.

Further, the square blocks have four corners as connection positions.

Further, the semi-square block is a triangular block.

Furthermore, the cell is made of porous materials.

The beneficial effects and invention points of the invention are as follows:

1. to background art's 1 st point, adopted being connected between complete square piece and the half square piece, utilized the revolving force of half square piece to upwards jack up corresponding hinge and isosceles trapezoid board, form the hunch top surface, upwards jack up when encircleing the top surface and being compressed is higher than other surfaces (like figure 3) to not only utilize the elasticity performance of material itself, utilized the jacking force that the revolving force constructed more.

2. To background's 2 nd point, through setting up isosceles trapezoid board, the flexible hinge of formula of buckling to when being compressed, isosceles trapezoid board, the flexible hinge of formula of buckling are outstanding in to the space in the single compression space, have found more stable, the stronger compression space of support nature.

3. To the 3 rd point of background art, through the setting of isosceles trapezoid board, the direction that isosceles trapezoid board extends is the same with the direction of pressure, and isosceles trapezoid has strengthened bending resistance and intensity to constitute bending-resistant structure, not only increase intensity, strengthened bending resistance more.

4. To the 4 th point of background art, the isosceles trapezoid board of the bottom surface of every flexible mechanism constitutes the embedding board, and the embedding board is connected with the recess embedding that corresponds in the pneumatic cylinder, provides more stable connected mode.

5. To the 5 th point of the background art, the peripheral wall forms the cavity when the flexible mechanism is compressed, and the flexible mechanism is inside hollow, and oil can let into inside the flexible mechanism to flow out from the cavity, improved space utilization, the position of hydraulic fluid port corresponds with the cavity to construct the oil circuit.

6. Aiming at the 6 th point of the background technology, a guide post is designed, is positioned on the surface of a piston and can be matched with a hollow flexible mechanism to construct stroke guide.

7. To the 7 th point of the background art, through the square block arrangement in the cell element, the square block is rotated to form the screw force when being compressed, and the screw force can provide more stable buffer force.

8. To the 8 th point of the background art, compared with the linear arrangement in the prior art, the flexible mechanism arranged in a circular manner makes the buffering capacity stronger.

Note: the foregoing designs are not sequential, each of which provides a distinct and significant advance in the present invention over the prior art.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is an isometric view of a compliant mechanism of the present invention in an unstressed condition

FIG. 2 is an axial side view of a compliant mechanism of the present invention in axial tension

FIG. 3 is an axial side view of a compliant mechanism of the present invention in an axially stressed condition

FIG. 4 is an isometric view of a single cell of the present invention in an unstressed state

FIG. 5 is an axial side view of a single cell of the present invention under axial tension

FIG. 6 is an axial side view of a single cell of the present invention under axial compression

FIG. 7 is a schematic view of a hydraulic cylinder according to the present invention

FIG. 8 is a schematic view of a machining apparatus of the present invention

FIG. 9 is a schematic view of the present invention of the clamping feed

In the figures, the reference numerals are as follows:

1-cell element, 2-square block assembly, 101-first isosceles trapezoid plate, 102-second isosceles trapezoid plate, 103-A square block, 104-B square block, 105-C square block, 106-D square block, 107-first notch flexible hinge, 108-first bending flexible hinge, 109-second notch flexible hinge, 110-third notch flexible hinge, 111-second bending flexible hinge, 112-fourth notch flexible hinge, 3-arch top surface, 4-half square block, 5-embedding plate, 6-driving rod, 7-piston, 8-flexible mechanism, 9-guide column, 10-oil port, 11-cylinder body, 12-connecting sleeve, 13-workpiece, 14-workbench, 15-first clamping hydraulic cylinder, 16-a second clamping hydraulic cylinder, 17-a bracket, 18-a driving part, 19-a working head and 20-a feeding hydraulic cylinder.

Detailed Description

As shown in the figure: a machining device comprising: a workbench 14, a first clamping hydraulic cylinder 15, a second clamping hydraulic cylinder 16, a bracket 17, a driving part 18, a working head 19 and a feeding hydraulic cylinder 20; the support 17 is arranged above the workbench 14, the driving part 18 is suspended at the upper part of the support 17, the driving part 18 drives the working head 19 to process the workpiece 13, the left side of the workpiece 13 is provided with a first clamping hydraulic cylinder 15, and the right side of the workpiece 13 is provided with a second clamping hydraulic cylinder 16; the feeding hydraulic cylinder 20 controls the workpiece 13 to move;

the first clamping hydraulic cylinder 15, the second clamping hydraulic cylinder 16 and the feeding hydraulic cylinder 20 all include: the device comprises a cylinder body 11, a driving rod 6, a piston 7, a guide post 9, an oil port 10, a flexible mechanism 8 and a connecting sleeve 12; the flexible mechanism 8 is in a hollow cylindrical shape, a driving rod 6 is arranged in a cylinder body 11, the driving rod 6 is connected with a piston 7, a guide column 9 is arranged on the surface of the piston 7, and the guide column 9 is combined with or separated from the hollow interior of the flexible mechanism 8 in the movement process of the piston 7; the surface of the flexible mechanism 8 is provided with a cavity, and the position of the oil port 10 corresponds to the flexible mechanism 8 in a compressed state of the flexible mechanism 8; the flexible mechanism 8 is arranged in the connecting sleeve 12;

the flexible mechanism 8 comprises a cell 1, the cell 1 comprising: a first isosceles trapezoid plate 101, a second isosceles trapezoid plate 102, an A square block 103, a B square block 104, a C square block 105, a D square block 106, a first notched flexible hinge 107, a second notched flexible hinge 109, a third notched flexible hinge 110, a fourth notched flexible hinge 112, a first bent flexible hinge 108, and a second bent flexible hinge 111;

the first bending type flexible hinge 108 is connected between the A square block 103 and the B square block 104, the second bending type flexible hinge 111 is connected between the C square block 105 and the D square block 106, the A square block 103 is connected with the first notched type flexible hinge 107, the B square block 104 is connected with the second notched type flexible hinge 109, the C square block 105 is connected with the third notched type flexible hinge 110, the D square block 106 is connected with the fourth notched type flexible hinge 112, the first notched type flexible hinge 107 is connected with the fourth notched type flexible hinge 112, the first isosceles trapezoid plate 101 is connected between the first notched type flexible hinge 107 and the fourth notched type flexible hinge 112, the second isosceles trapezoid plate 102 is connected between the second notched type flexible hinge 109 and the third notched type flexible hinge 110, and the first isosceles trapezoid plate 101 and the second isosceles trapezoid plate 102 extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge 108 and the second bending type flexible hinge 111; all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;

the flexible mechanism 8 further comprises: the arch top surface 3, the half-square block 4 and the embedded plate 5 are arranged on the upper portion of the flexible mechanism 8, the embedded plate 5 is arranged on the lowest portion of the flexible mechanism 8, and the embedded plate 5 is connected with a groove in the bottom of the hydraulic cylinder in a matched mode.

The bottom surfaces of the first isosceles trapezoidal plate 101 and the second isosceles trapezoidal plate 102 are parallel to each other. The value of m/n is 4. The number of the flexible mechanisms 8 is five. Said flexible means 8 are distributed along the circumference. The number of the guide posts 9 is five. The guide posts 9 are distributed along the circumference. The square blocks take four corners as connecting positions. The semi-square block 4 is a triangular block. The cell 1 is made of porous material.

The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A machining device, comprising: the device comprises a workbench (14), a first clamping hydraulic cylinder (15), a second clamping hydraulic cylinder (16), a bracket (17), a driving part (18), a working head (19) and a feeding hydraulic cylinder (20); the support (17) is arranged above the workbench (14), the driving part (18) is suspended at the upper part of the support (17), the driving part (18) drives the working head (19) to process a workpiece (13), a first clamping hydraulic cylinder (15) is arranged on the left side of the workpiece (13), and a second clamping hydraulic cylinder (16) is arranged on the right side of the workpiece (13); the feeding hydraulic cylinder (20) controls the workpiece (13) to move;

the first clamping hydraulic cylinder (15), the second clamping hydraulic cylinder (16), and the feeding hydraulic cylinder (20) all include: the hydraulic cylinder comprises a cylinder body (11), a driving rod (6), a piston (7), a guide post (9), an oil port (10), a flexible mechanism (8) and a connecting sleeve (12); the flexible mechanism (8) is in a hollow cylindrical shape, a driving rod (6) is arranged in a cylinder body (11), the driving rod (6) is connected with a piston (7), a guide column (9) is arranged on the surface of the piston (7), and the guide column (9) is combined with or separated from the hollow interior of the flexible mechanism (8) in the movement process of the piston (7); the surface of the flexible mechanism (8) is provided with a cavity, and the position of the oil port (10) corresponds to the flexible mechanism (8) in the compressed state of the flexible mechanism (8); the flexible mechanism (8) is arranged in the connecting sleeve (12);

the flexible mechanism (8) comprises a cell (1), the cell (1) comprising: the folding type folding ladder comprises a first isosceles trapezoid plate (101), a second isosceles trapezoid plate (102), an A square block (103), a B square block (104), a C square block (105), a D square block (106), a first notch type flexible hinge (107), a second notch type flexible hinge (109), a third notch type flexible hinge (110), a fourth notch type flexible hinge (112), a first bending type flexible hinge (108) and a second bending type flexible hinge (111);

connect between A square piece (103) and B square piece (104) first flexible hinge of bending formula (108), connect between C square piece (105) and D square piece (106) second flexible hinge of bending formula (111), A square piece (103) with first flexible hinge of breach formula (107) is connected, B square piece (104) with second flexible hinge of breach formula (109) is connected, C square piece (105) with third flexible hinge of breach formula (110), D square piece (106) with fourth flexible hinge of breach formula (112) is connected, first flexible hinge of breach formula (107) with fourth flexible hinge of breach formula (112) is connected first waist trapezoidal plate (101), connect between second flexible hinge of breach formula (109) and third flexible hinge of breach formula (110) second waist trapezoidal plate (102), the first isosceles trapezoid plate (101) and the second isosceles trapezoid plate (102) extend downwards; bending lines are arranged in the middle of the first bending type flexible hinge (108) and the second bending type flexible hinge (111); all square blocks and isosceles trapezoid plate thickness are m, and all breach formula flexible hinge's thickness is n, and satisfies: m/n is more than 3 and less than 6;

the flexible mechanism (8) further comprises: encircle top surface (3), half square block (4), inlay board (5), half square block (4) and encircle top surface (3) and be located the upper portion of flexible mechanism (8), flexible mechanism (8) below is equipped with inlay board (5), inlay board (5) are connected with the recess cooperation of pneumatic cylinder bottom.

2. A machining device according to claim 1, characterized in that: the bottom surfaces of the first isosceles trapezoid plate (101) and the second isosceles trapezoid plate (102) are parallel to each other.

3. A machining device according to claim 1, characterized in that: the value of m/n is 4.

4. A machining device according to claim 1, characterized in that: the number of the flexible mechanisms (8) is five.

5. A machining device according to claim 4, characterized in that: the flexible means (8) are distributed along the circumference.

6. A machining device according to claim 5, characterized in that: the number of the guide posts (9) is five.

7. A machining device according to claim 6, characterized in that: the guide posts (9) are distributed along the circumference.

8. A machining device according to claim 1, characterized in that: the square blocks take four corners as connecting positions.

9. A machining device according to claim 1, characterized in that: the semi-square block (4) is a triangular block.

10. A machining device according to claim 1, characterized in that: the cell (1) is made of porous material.