CN212496618U

CN212496618U - Automatic-adjusting multi-station precision clamp

Info

Publication number: CN212496618U
Application number: CN202020943150.7U
Authority: CN
Inventors: 邱崇振; 李中华
Original assignee: Wuhan Feituoke Industry Co ltd
Current assignee: Wuhan Feituoke Industry Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-02-09
Anticipated expiration: 2030-05-27

Abstract

The utility model relates to an anchor clamps technical field, concretely relates to automatic adjust multistation precision clamp. Comprises a vice, a pressing block, a guide valve, a pressure shaft and an oil cylinder body. The axial direction of the oil cylinder body is provided with at least 2 groups of containing cavities, the containing cavities are communicated in pairs, the guide valve is fixed in the containing cavities, the pressure shaft is arranged in the guide valve, and the pressing block is connected with the pressure shaft. After high-pressure oil is injected into the accommodating cavity of the oil cylinder body, the high-pressure oil forces the pressure shaft to move axially in the guide valve, and the pressure shaft pushes the pressing block to move, so that a product is clamped. Because the containing cavities are communicated in pairs, the high-pressure oil in each containing cavity has the same pressure, and the pressing depth can be automatically adjusted by the pressing block even if the product shapes are different. The utility model discloses a hydro-cylinder intercommunication principle realizes that the product specification also can be simultaneously the multistation clamping differently, promotes work efficiency, and one person's multimachine production has reduced working strength.

Description

Automatic-adjusting multi-station precision clamp

Technical Field

The utility model relates to a CNC numerical control processing field, concretely relates to machining clamping and location.

Background

In the field of CNC (computerized numerical control) machining, a material to be machined needs to be clamped and positioned. At present, most of multi-station precision clamps cannot clamp at one time due to variation of product precision tolerance and different sizes of appearances, and even if the multi-station precision clamps can finish clamping at one time, phenomena such as looseness can also occur. To address this problem, a multi-station fixture is often used in which each product is clamped using a separate clamping force. Therefore, the design and practical application are complex, and the clamp has a large volume, so that the clamp cannot be used on small equipment and small-stroke machines. The clamp has higher manufacturing cost, is not beneficial to popularization and batch use, and has high working strength and low efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides an automatic adjust multistation precision finishing anchor clamps, including vice, compact heap, guide valve, pressure shaft, hydro-cylinder body. The oil cylinder body is arranged on the vice, the oil cylinder body is provided with at least two groups of containing cavities in the axial direction, every two adjacent containing cavities are communicated, the guide valve is fixed in the containing cavities, the pressure shaft is arranged in the guide valve, the pressing block is connected with the pressure shaft, and the pressure shaft can axially move in the guide valve.

Further, a positioning plate is arranged between the oil cylinder body and the vice, and the oil cylinder body is fixed on the vice through the positioning plate.

Furthermore, an orientation block is arranged between the pressure shaft and the pressing block, and the orientation block is connected to the oil cylinder body.

Further, the upper end of the pressure shaft extends through the positioning block and is connected with the pressing block, and further, the lower end of the pressure shaft is provided with an annular groove, and a first sealing element is arranged in the annular groove.

Further, a second sealing element is arranged between the oil cylinder body and the guide valve.

Furthermore, an injection port is formed in the side wall of the oil cylinder body, the injection port is communicated with the adjacent accommodating cavities, and a sealing plug is arranged in the injection port.

The utility model has the advantages that the multi-station simultaneous clamping can be realized, and the efficiency is improved; one person produces a plurality of machines, so that the working strength is greatly reduced; simple structure, easy and simple to handle, be fit for wide application.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

fig. 2 is an exploded perspective view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is a perspective view of the structure of the cylinder body of the present invention;

fig. 5 is a perspective view of the pressure shaft according to the present invention;

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

The utility model discloses a vice 10, compact heap 22, guide valve 42, pressure shaft 50, hydro-cylinder body 56. The vice 10 can be selected to be an air-compression quick precision vice or a common vice, in the preferred embodiment of the present invention, the vice 10 is an air-compression quick precision vice. With particular reference to FIG. 1, the vise 10 is generally rectangular in shape, with the movable module 17 and the end 15 thereof defining a rectangular slot 24. The cylinder body 56 is arranged in the rectangular groove 24, and a positioning plate 62 is arranged between the cylinder body 56 and the movable module 17 for facilitating the installation of the cylinder body 56, and the positioning plate 62 is processed into a universal type. When the mounting device is used, the positioning plate 62 is fixed on the side wall 27 of the movable module 17, and then the oil cylinder body 56 is fastened on the positioning plate.

The cylinder body 56 has a rectangular shape, and a receiving chamber 60 is provided in an axial direction thereof. As one of the purposes of the present invention, in order to improve the clamping efficiency, the accommodating chamber 60 is at least two sets. Preferably, the accommodating cavities 60 are four groups, and are uniformly distributed in the axial direction, and adjacent accommodating cavities 60 are communicated through the hole 30. The pilot valve 42 is disposed in the accommodation chamber 60, and the pilot valve 42 is substantially cylindrical and fixed at a lower end thereof to the cylinder body 56. The connection method of the pilot valve 42 is not limited to a screw connection, a snap ring connection, or the like. For example, the lower end of pilot valve 42 may be threaded as a male thread while a mating female thread is machined into receiving cavity 60.

In order to ensure the tightness between the pilot valve 42 and the cylinder body 56, in a preferred embodiment, the receiving chamber 60 is formed by a large counterbore 31 and a small counterbore 33, the large counterbore 31 and the small counterbore 33 forming a shoulder 28 at the transition thereof. The middle part of the guide valve 42 is processed into a section of annular boss 32 which is enlarged in the radial direction, the lower end surface of the annular boss 32 abuts against the shaft shoulder 28, the second sealing element 26 is arranged between the annular boss 32 and the shaft shoulder 28, the second sealing element 26 is not limited to an O-ring, fluororubber, nitrile rubber and the like, and is preferably an O-ring, and the second sealing element 26 forms a good seal between the guide valve 42 and the cylinder body 56.

The pressure shaft 50 is disposed within the central bore 20 of the pilot valve 42, and the pressure shaft 50 is cylindrical with an outer surface that mates with the central bore 20 of the pilot valve 42. To avoid upward movement of the product during clamping and to ensure clamping accuracy, the tolerance fit between the pilot valve 42 and the pressure shaft 50 is controlled to within H7 accuracy. The central bore 20 of the pilot valve 42 is formed of two sections of differing bore diameters so that a shoulder 38 is formed on the inner wall thereof and a boss 54 is provided on the outer wall of the pressure shaft 50. The shoulder 38 and boss 54 axially confine the pressure shaft 50 within the central bore 20 of the pilot valve 42, preventing the pressure shaft 50 from flushing out of the pilot valve. Adjacent the boss 54 is provided a continuous annular groove 52, and within the annular groove 52 is provided a first sealing element 18, the first sealing element 18 not being limited to an O-ring, viton, nitrile rubber or the like, preferably an O-ring, the first sealing element 18 being able to form a good seal between the pressure shaft and the pilot valve 42.

The front end of the pressure shaft 50 is connected to the pressing block 22, the pressing block 22 is square and is provided with a through countersunk hole 25, and a screw 48 passes through the countersunk hole 25 and is inserted into a screw hole 51 at the front end part of the pressure shaft 50 to fasten the pressure shaft together. In another preferred scheme, an orientation block 34 is further arranged between the pressure shaft 50 and the pressing block 22, the orientation block 34 is basically square, an opening 35 is formed in one end of the orientation block 34, and the orientation block 34 is fixed on the oil cylinder body 56. Specifically, the screws 36 sequentially pass through the fixing holes 39 on the four corner edges of the orientation block 34, are inserted into the screw holes 58 on the cylinder body 56, and are fixed by tightening the screws 36. In order to prevent the pressure shaft 50 from rotating relative to the guide valve 42, the upper end of the pressure shaft 50 is preferably provided with a flat portion 53, and the flat portion 53 extends through the limiting hole 37 of the orientation block 34 and then is connected with the pressing block 22. Similarly, to avoid upward movement of the product during clamping and to ensure clamping accuracy, the tolerance fit between the pressure shaft 50 and the pressure block 22 needs to be controlled within H7 accuracy.

Before clamping, place product 12 in the clamping position, inject high pressure oil in the holding chamber 60 of hydro-cylinder body 56, press button 16, movable mould 17 moves to the direction that is close to product 12 axially, after compact heap 22 contacted product 12, because holding chamber 60 is link up, the pressure of the interior high pressure oil of each holding chamber 60 is unanimous, consequently, even the appearance size of product 12 is different, compact heap 22 also can automatic adjustment compress tightly the degree of depth, reaches the clamping requirement. After one clamping is finished, the button 16 is pressed, and the movable module 17 moves axially away from the product 12, so that the product 12 is loosened. In order to facilitate the injection of high pressure oil, it is preferable that an injection port 40 communicating with the receiving chamber 60 is provided at one side of the cylinder body 56, and the injection port 40 is blocked by a sealing plug 46 when a sufficient amount of high pressure oil is injected. The sealing plug 46 may be implemented in the form of threads, latches, etc.

The invention has been described with reference to the preferred embodiments, to the above examples which are not intended to limit the invention, and from reading the present description, those skilled in the art will be able to conceive of numerous modifications and variations to this structure, without departing from the inventive concept, any obvious alternative falling within the scope of the invention.

Claims

1. Automatic adjust multistation precision clamp, including vice (10), compact heap (22), guide valve (42), pressure shaft (50), hydro-cylinder body (56), its characterized in that hydro-cylinder body (56) set up on vice (10), hydro-cylinder body (56) have at least two sets of holding chamber (60) in its axial direction, and adjacent holding chamber (60) are two liang linked together, guide valve (42) are fixed in holding chamber (60), pressure shaft (50) set up in guide valve (42), compact heap (22) with pressure shaft (50) are connected, pressure shaft (50) can axial displacement in guide valve (42).

2. The automatic-adjustment multi-station precision clamp according to claim 1, wherein a positioning plate (62) is arranged between the cylinder body (56) and the vice (10), and the cylinder body (56) is connected to the vice (10) through the positioning plate (62).

3. The automatic-adjustment multi-station precision clamp according to claim 2, wherein an orientation block (34) is arranged between the pressure shaft (50) and the pressing block (22), and the orientation block (34) is fixed on the oil cylinder body (56).

4. The self-adjusting multi-station precision clamp according to claim 3, characterized in that the upper end of the pressure shaft (50) extends through the orientation block (34) and is connected with the pressing block (22).

5. An automatically adjusting, multi-station precision clamp according to claim 4, characterized in that the lower end of the pressure shaft (50) is provided with an annular groove (52), the annular groove (52) having a first sealing element (18) disposed therein.

6. The automatic adjusting multi-station precision jig according to claim 5, characterized in that a second sealing element (26) is provided between the cylinder body (56) and the pilot valve (42).

7. The automatic-adjustment multi-station precision clamp according to claim 1, wherein the side wall of the oil cylinder body (56) is provided with an injection port (40), the injection port (40) is communicated with the adjacent accommodating cavity (60), and a sealing plug (46) is arranged in the injection port (40).