CN212398895U

CN212398895U - Clamp for machining valve core hole on periphery of hydraulic valve block

Info

Publication number: CN212398895U
Application number: CN202020879488.0U
Authority: CN
Inventors: 张松; 徐言炳; 陈飞; 韦晶晖
Original assignee: Wuxi Ruizhen Precision Machinery Co ltd
Current assignee: Wuxi Ruizhen Precision Machinery Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-01-26
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to an anchor clamps for processing peripheral case hole of hydraulic valve piece. In particular, the fixture is used for positioning the periphery of the hydraulic valve block when the periphery of the hydraulic valve block is subjected to finish machining. It comprises a bottom plate and is characterized in that: at least two supporting plates are arranged on the bottom plate, and the supporting plate at the lowest part is fixed with the bottom plate. The backup pad is the rectangle, all links between the vertical center of two adjacent backup pads has the support. Clamping units are arranged on two sides of the support. The clamping unit consists of a supporting mechanism connected to the upper part of the supporting plate below the clamping unit and a pressing mechanism connected to the lower part of the supporting plate above the clamping unit. The fixture is used for positioning the hydraulic valve block, so that the operation is easy, and the production efficiency and the product quality can be improved.

Description

Clamp for machining valve core hole on periphery of hydraulic valve block

Technical Field

The utility model relates to a clamp. In particular, the fixture is used for positioning the periphery of the hydraulic valve block when the periphery of the hydraulic valve block is subjected to finish machining.

Background

As known in the hydraulic valve production industry, a hydraulic valve block is a key part of a hydraulic system, is cuboid in shape, and needs to be positioned by means of a clamp when a blank of the hydraulic valve block is subjected to fine machining. At present, the positioning method adopted in the precision machining of the blank of the hydraulic valve block is the traditional method. The traditional positioning method is realized by adopting a plurality of lever oil cylinders to press a hydraulic valve block blank on a workbench. Although the method can be used for positioning the blank of the hydraulic valve block, the lever oil cylinder is positioned around the hydraulic valve block to be processed, so that interference can be brought to the cutter in the processing process, the feeding action of the cutter is complex, the operation is troublesome, and the production efficiency is low. In addition, because the processed hydraulic valve block is a casting blank, if the lever oil cylinders are adopted to compress along the periphery of the hydraulic valve block, the pressing force of each lever oil cylinder is difficult to control, the processing precision cannot be ensured, and the product quality is difficult to ensure.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide an anchor clamps for processing peripheral case hole of hydraulic valve piece. The fixture is used for positioning the hydraulic valve block, so that the operation is easy, and the production efficiency and the product quality can be improved.

The utility model discloses the above-mentioned problem that solves is realized by following technical scheme:

the utility model discloses an anchor clamps for processing peripheral case hole of hydraulic valve piece contain the bottom plate, and its characteristics are: at least two supporting plates are arranged on the bottom plate, and the supporting plate at the lowest part is fixed with the bottom plate. The backup pad is the rectangle, all links between the vertical center of two adjacent backup pads has the support. Clamping units are arranged on two sides of the support. The clamping unit consists of a supporting mechanism connected to the upper part of the supporting plate below the clamping unit and a pressing mechanism connected to the lower part of the supporting plate above the clamping unit.

The supporting mechanism comprises a cushion block, vertical blind holes are formed in the inner side and the outer side of the cushion block, and elastic pins are arranged in the vertical blind holes. The upper end of the elastic pin extends out of the cushion block and is connected with a supporting rod perpendicular to the cushion block. The two support rods on the cushion block are parallel and vertical to the length direction of the support plate, and the cushion block at the inner side of the two support rods is transversely connected with three support pins. And a round pin and a diamond pin which are used for propping against the corresponding through hole of the processed hydraulic valve block are connected on the cushion block between the two support rods.

The pressing mechanism comprises an oil cylinder. The oil cylinder is vertically arranged, the cylinder body of the oil cylinder is connected to the supporting plate above the corresponding supporting mechanism, and the outer end of the piston rod of the oil cylinder faces downwards and is connected with a three-head pressing plate.

The utility model discloses a further improvement scheme is, the piston rod lower extreme has the connector. The connector is approximately cylindrical, the upper end of the connector is connected with the outer end of the piston rod, the lower end of the connector is provided with a spherical pit, and the center of the bottom of the spherical pit is provided with an upper vertical blind hole. A flat pit is formed in the center of the upper surface of the three-head pressing plate, and a hemispherical ball head is fixed in the flat pit. After the diameter of the hemispherical ball head is matched with the diameter of the spherical pit at the lower end of the connector and the spherical pit at the lower end of the connector are in movable fit, a gap is reserved between the periphery of the lower end of the connector and the upper surface of the three-head pressing plate.

A lower vertical blind hole is arranged below the hemispherical ball head. The lower vertical blind hole corresponds to the upper vertical blind hole, and the inner diameter of the lower vertical blind hole is larger than that of the upper vertical blind hole, so that an axial step is formed in the lower vertical blind hole. A second spring is arranged in the lower vertical blind hole below the step.

The bottom of the lower vertical blind hole is provided with a pin hole, and an anti-drop pin is arranged among the lower vertical blind hole, the pin hole and the upper vertical blind hole. The upper end of the anti-falling pin is provided with a ball head which is integrated with the anti-falling pin, and the diameter of the ball head is matched with that of the upper vertical blind hole and is larger than that of the pin hole in the bottom of the lower vertical blind hole. The ball head at the upper end of the anti-falling pin sequentially penetrates through the second spring and the pin hole in the bottom of the lower vertical blind hole from the lower side of the three-head pressing plate and then movably extends into the upper vertical blind hole, and the pin cover at the lower end of the anti-falling pin is connected with the lower surface of the three-head pressing plate through the screw.

The hemispherical ball head is formed by butt joint of two ball head flaps; the two ball head sections are formed by cutting a hemispherical ball head along the center of the hemispherical ball head, the cutting surfaces of the two ball head sections are respectively provided with an upper radial groove and a lower radial groove, the caliber of the opening of the upper radial groove is smaller than that of the opening of the lower radial groove, during assembly, the two upper radial grooves are butted to form the pin hole, and the two lower radial grooves are butted to form the lower vertical blind hole.

According to the scheme, at least two support plates are arranged on the bottom plate, and the support plate at the lowest position is fixed with the bottom plate. The backup pad is the rectangle, all links between the center of two adjacent backup pads has the support. Clamping units are arranged on two sides of the support. The clamping unit consists of a supporting mechanism connected to the upper part of the supporting plate below the clamping unit and a pressing mechanism connected to the lower part of the supporting plate above the clamping unit. The pressing mechanism comprises an oil cylinder. The oil cylinder is vertically arranged, the cylinder body of the oil cylinder is connected to the supporting plate above the corresponding supporting mechanism, and the outer end of the piston rod of the oil cylinder faces downwards and is connected with a three-head pressing plate. The processed valve block can be pressed between the pressing mechanism and the supporting mechanism by using the oil cylinder and the three-head pressing plate in the pressing mechanism, and pressing points are not arranged around the hydraulic valve block, so that the interference to a cutter in the processing process is avoided. Compared with the background art, the whole machining process does not need to replace the pressing position. Because the pressing position does not need to be replaced in the machining process, the operation is easier, and the production efficiency is improved. In addition, the processed valve block can be pressed between the pressing mechanism and the supporting mechanism by using the oil cylinder and the three-head pressing plate in the pressing mechanism, and the pressing points are not arranged around the hydraulic valve block, so that the pressing force is easy to control, the processing precision is ensured, and the product quality is improved.

Drawings

FIG. 1 is a schematic view of the fixture for machining a valve core hole around a hydraulic valve block of the present invention;

FIG. 2 is an enlarged schematic view of point I of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is an enlarged view of the hold-down mechanism of FIG. 1;

FIG. 5 is an enlarged view of the triple-headed platen 19 of FIG. 1;

fig. 6 is a schematic perspective view of the clamp for processing the valve core hole around the hydraulic valve block of the present invention.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the clamp for processing the valve core hole around the hydraulic valve block of the present invention includes a bottom plate 1, three supporting plates 2 are disposed on the bottom plate 1, and the lowermost supporting plate 2 is fixed with the bottom plate 1 by means of bolts. The supporting plates 2 are rectangular, and a support 5 is connected between the longitudinal centers of every two adjacent supporting plates 2. Clamping units are arranged on two sides of the support 5. The clamping unit consists of a support mechanism attached above the support plate 2 below it and a hold-down mechanism attached below the support plate 2 above it. Referring to fig. 1, when the hydraulic valve block 3 is processed, the hydraulic valve block 3 is clamped between the support mechanism and the pressing mechanism.

Wherein:

the supporting mechanism comprises a cushion block 6, the cushion block 6 is a rectangular plate, the width of the cushion block is the same as that of the supporting plate 2, and the length of the cushion block is smaller than the distance between one end of the cushion block and the support 5. Vertical blind holes are processed on the inner side (namely the side close to the support 5) and the outer side (namely the side far away from the support 5) of the cushion block 6, and elastic pins are arranged in the vertical blind holes. The elastic pin is composed of a first spring 15 and a short pin 13, the lower end of the first spring 15 abuts against the bottom of the vertical blind hole, and the lower end of the short pin 13 abuts against the upper end of the first spring 15. The upper end of the short pin 13 extends out of the cushion block 6 and is connected with a supporting rod 14 vertical to the upper end. The two support rods 14 on the cushion block 6 are parallel and vertical to the length direction of the support plate 2, and the cushion block 6 at the inner side of the two support rods 14 is transversely provided with three support pins 10. The three support pins 10 are parallel to each other, and their lower ends are fixed to the pad 6. The cushion block 6 between the two support rods 14 is also provided with a round pin 11 and a diamond pin 12. The round pin 11 and the diamond pin 12 are parallel, the lower ends of the round pin and the diamond pin are fixed on the cushion block 6, and the upper ends of the round pin and the diamond pin are propped in corresponding through holes of the processed hydraulic valve block.

The pressing mechanism comprises an oil cylinder 16. The oil cylinder 16 is vertically arranged, the cylinder body of the oil cylinder is connected to the supporting plate 2 above the corresponding supporting mechanism, and the outer end of the piston rod of the oil cylinder faces downwards and is connected with a three-head pressing plate 19.

Wherein, the lower end of the piston rod is provided with a connector 17. The connector 17 is approximately cylindrical, the upper end of the connector is connected with the outer end of the piston rod, a spherical pit is machined at the lower end of the connector, and an upper vertical blind hole 171 is machined in the center of the bottom of the spherical pit. A flat bottom pit is processed in the center of the upper surface of the three-head pressing plate 19, and a hemispherical ball head 18 is fixed in the flat bottom pit. The diameter of the hemispherical ball head 18 is matched with the diameter of the spherical pit at the lower end of the connector 17, and the hemispherical ball head and the spherical pit are in movable fit. A gap 172 is reserved between the periphery of the lower end of the connecting head 17 and the upper surface of the three-head pressing plate 19.

A lower vertical blind hole 181 is processed below the hemispherical ball head 18. The lower vertical blind hole 181 corresponds to the upper vertical blind hole 171, and the inner diameter of the lower vertical blind hole 181 is larger than the upper vertical blind hole 171, so that a circumferential step 173 is formed in the lower vertical blind hole 181. A second spring 21 is mounted in a lower vertical blind hole 181 below the circumferential step 173.

A pin hole is processed on the bottom of the lower vertical blind hole 181, and an anti-drop pin 20 is arranged among the lower vertical blind hole 181, the pin hole and the upper vertical blind hole 171. The upper end of the anti-drop pin 20 is provided with a ball head 201 which is integrated with the anti-drop pin, and the diameter of the ball head 201 is matched with that of the upper vertical blind hole 171 and is larger than that of the pin hole in the bottom of the lower vertical blind hole 181. The ball head 201 at the upper end of the anti-falling pin 20 sequentially passes through the second spring 21 and the pin hole at the bottom of the lower vertical blind hole 181 from the lower part of the three-head pressing plate 19 and then movably extends into the upper vertical blind hole 171, the lower end of the pin head is provided with a pin cover 202, and the pin cover 202 is connected to the lower surface of the three-head pressing plate 19 through screws.

The hemispherical ball head 18 is formed by two ball head lobes which are butted together. The two ball head sections are formed by cutting a hemispherical ball head along the center of the hemispherical ball head, an upper radial groove and a lower radial groove are machined on the cutting surfaces of the two ball head sections, the caliber of the notch of the upper radial groove is smaller than that of the notch of the lower radial groove, the two upper radial grooves are butted to form the pin hole during assembly, and the two lower radial grooves are butted to form the lower vertical blind hole 181.

Claims

1. A anchor clamps for processing peripheral case hole of hydraulic valve piece, including bottom plate (1), its characterized in that: at least two supporting plates (2) are arranged on the bottom plate (1), and the supporting plate (2) at the lowest part is fixed with the bottom plate (1); the supporting plates (2) are rectangular, and a support (5) is connected between the longitudinal centers of two adjacent supporting plates (2); clamping units are arranged on two sides of the support (5); the clamping unit consists of a supporting mechanism connected above the supporting plate (2) below the clamping unit and a pressing mechanism connected below the supporting plate (2) above the clamping unit.

2. The clamp for machining the peripheral spool hole of the hydraulic valve block according to claim 1, is characterized in that: the supporting mechanism comprises a cushion block (6), vertical blind holes are formed in the inner side and the outer side of the cushion block (6), and elastic pins are arranged in the vertical blind holes; the upper end of the elastic pin extends out of the cushion block (6) and is connected with a supporting rod (14) vertical to the cushion block; the two support rods (14) on the cushion block (6) are parallel and vertical to the length direction of the support plate (2), and the cushion block (6) at the inner sides of the two support rods (14) is transversely connected with three support pins (10); a cushion block (6) between the two support rods (14) is connected with a round pin (11) and a diamond pin (12) which are used for propping against corresponding through holes of the processed hydraulic valve block; the pressing mechanism comprises an oil cylinder (16); the oil cylinder (16) is vertically arranged, the cylinder body of the oil cylinder is connected to the supporting plate (2) above the corresponding supporting mechanism, and the outer end of the piston rod of the oil cylinder faces downwards and is connected with a three-head pressing plate (19).

3. The clamp for machining the peripheral spool hole of the hydraulic valve block according to claim 2, is characterized in that: the lower end of the piston rod is provided with a connector (17); the connector (17) is approximately cylindrical, the upper end of the connector is connected with the outer end of the piston rod, the lower end of the connector is provided with a spherical pit, and the center of the bottom of the spherical pit is provided with an upper vertical blind hole (171); a flat pit is arranged in the center of the upper surface of the three-head pressure plate (19), and a hemispherical ball head (18) is fixed in the flat pit; the diameter of the hemispherical ball head (18) is matched with the diameter of a spherical pit at the lower end of the connector (17), and after the hemispherical ball head and the spherical pit are in movable fit, a gap (172) is reserved between the periphery of the lower end of the connector (17) and the upper surface of the three-head pressing plate (19); a lower vertical blind hole (181) is arranged below the hemispherical ball head (18); the lower vertical blind hole (181) corresponds to the upper vertical blind hole (171), and the inner diameter of the lower vertical blind hole (181) is larger than that of the upper vertical blind hole (171), so that an axial step (173) is arranged in the lower vertical blind hole (181); a second spring (21) is arranged in a lower vertical blind hole (181) below the step (173); a pin hole is formed in the bottom of the lower vertical blind hole (181), and a pin falling prevention pin (20) is arranged among the lower vertical blind hole (181), the pin hole and the upper vertical blind hole (171); the upper end of the anti-falling pin (20) is provided with a ball head (201) which is integrated with the anti-falling pin, and the diameter of the ball head (201) is matched with that of the upper vertical blind hole (171) and is larger than that of a pin hole in the bottom of the lower vertical blind hole (181); the ball head (201) at the upper end of the anti-falling pin (20) sequentially penetrates through the second spring (21) and the pin hole in the bottom of the lower vertical blind hole (181) from the lower side of the three-head pressing plate (19) and then movably extends into the upper vertical blind hole (171), and the pin cover (202) at the lower end of the anti-falling pin movably extends onto the lower surface of the three-head pressing plate (19) by means of screws.

4. The clamp for machining the peripheral spool hole of the hydraulic valve block according to claim 3, is characterized in that: the hemispherical ball head (18) is formed by butt joint of two ball head flaps; the two ball head sections are formed by cutting a hemispherical ball head along the center of the hemispherical ball head, an upper radial groove and a lower radial groove are formed in the cutting surfaces of the two ball head sections, the caliber of the notch of the upper radial groove is smaller than that of the notch of the lower radial groove, the two upper radial grooves are butted to form the pin hole during assembly, and the two lower radial grooves are butted to form the lower vertical blind hole (181).