CN114367922A - Hydraulic clamp for grinding biplane of step shaft - Google Patents

Abstract

The invention relates to a hydraulic clamp for grinding a biplane of a step shaft, which comprises a workbench, a clamp body arranged on the workbench, a fixed block and a movable block, wherein the fixed block is fixedly arranged beside a positioning reference surface at the top of the clamp body, the movable block has the freedom degree of moving up and down along the direction vertical to the positioning reference surface, and the side surfaces of the fixed block and the movable block, which are oppositely arranged, are processed into an inclined plane shape, so that a positioning gap capable of fixing the step shaft is formed between the fixed block and the movable block. Compared with the prior art, the invention can achieve very high positioning precision and consistency, and the clamp has strong universality and the like.

Description

A hydraulic clamp for grinding the double plane of the step shaft

technical field

The invention belongs to the technical field of clamps, and relates to a hydraulic clamp used for grinding a double plane of a step shaft.

Background technique

At present, for the double-plane grinding of the stepped shaft, most of the four shafts are installed on the platform, and one piece is clamped at a time. After grinding the first plane, after rotating 180 degrees, the other plane is ground. This method needs to be corrected when clamping, and can only clamp one piece at a time, the production efficiency is very low, and it cannot meet the needs of mass production. Rotation accuracy has higher requirements.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hydraulic clamp for grinding the double plane of the step shaft, so as to improve the positioning accuracy and consistency.

The object of the present invention can be realized through the following technical solutions:

A hydraulic clamp used for grinding a double plane of a step shaft, comprising a workbench, a clamp body mounted on the workbench, a fixed block and a movable block, wherein the fixed block is fixedly arranged beside a positioning reference surface on the top of the clamp body, The movable block has the degree of freedom to move up and down along the direction perpendicular to the positioning reference plane, and the side faces of the fixed block and the movable block opposite to the movable block are processed into an inclined plane, so that a fixed step shaft is formed between the fixed block and the movable block. positioning gap.

Further, the clip body has a hollow cavity, and a vertical through-hole movable through hole is processed on the top of the clip body, and a movable connecting rod is also arranged in the hollow cavity, and one end of the movable connecting rod passes through. The movable through hole is connected with the movable block, and the other end is connected with a driving member arranged in the hollow cavity, and is driven by the driving member to move up and down.

Further, the driving member includes a support base, a support arm, a hydraulic cylinder and a main hydraulic cylinder, wherein the main hydraulic cylinder is provided with an adjustable pressurizing stud, and the hydraulic supporting cylinder is provided with an adjustable pressure stud. There is a supporting hydraulic column that is driven by hydraulic oil to move up and down, the main hydraulic cylinder and the supporting hydraulic cylinder are connected by a hydraulic oil pipe, the middle part of the supporting arm is rotated and arranged on the supporting seat, and the two ends of the supporting arm are respectively The supporting hydraulic column and the movable connecting rod are movably connected.

Further preferably, the hydraulic support column and the movable connecting rod are both machined with strip holes along the horizontal direction, the two ends of the support arm are respectively rotated and installed with a connecting pin shaft, and the connecting pin shaft is also placed. in the strip hole, and can move back and forth along the strip hole.

More preferably, one or more of the hydraulic support cylinders are provided, and when there are several hydraulic support cylinders, each hydraulic support cylinder corresponds to a support arm, a movable link and a movable block respectively. More preferably, all the hydraulic cylinders share one main hydraulic cylinder.

Further preferably, the top end of the pressure stud is also provided with an inner hexagon hole, and the pressure stud is adjusted by screwing the pressure stud through a hexagonal wrench matched with the inner hexagon hole. The pressure applied to the hydraulic oil in the master hydraulic cylinder.

Furthermore, a reset elastic member is also provided between the lower end of the movable link and the bottom of the clamping body.

Further preferably, the reset elastic member includes a spring guide post vertically arranged on the bottom of the clamp body, and a reset spring sleeved on the spring guide post, and the lower end of the movable link is also processed with a spring guide post. The upper part of the column extends into the guide cavity, so that the spring guide column and the movable link can slide relatively along the moving direction of the movable block, and the two ends of the return spring are respectively connected to the movable link and the clamping body.

Further, the fixed block is provided with two spaced apart pieces on the top of the clip body, the cross section of the movable block is in the shape of an inverted isosceles trapezoid, and is located on the mid-perpendicular line of the two fixed blocks, and the movable block A positioning gap for fixing the stepped shaft is formed between each of the fixing blocks respectively.

Compared with the prior art, the present invention has the following advantages:

(1) The quality of the processed products is stable: the accuracy of the fixture is guaranteed by the accuracy of the fixture itself, and the factor of manpower to set the meter is removed, so the consistency is good, and the quality is stable and reliable.

(2) High positioning accuracy: The fixture clamps the workpiece at the same time by pulling down the movable block, which eliminates the problem of positioning gap, and the positioning reference is unified with the design reference, so the positioning accuracy is very high.

(3) The clamping is simple and reliable: the workpiece can be pulled down by tightening the pressure stud, and the movable block can be pulled down by loosening the pressure stud, and it can be automatically released under the action of the spring, which is convenient for product loading and unloading, and does not require operation skills and Check the table.

(4) Good economy: the fixture can be equipped with multiple hydraulic cylinders, sharing one main hydraulic cylinder, so that the simultaneous clamping of multiple parts can be completed with only one screw, which not only has high clamping efficiency, but also grinds multiple parts simultaneously. The product also greatly increases the grinding efficiency by 2 times, and the economic benefits are remarkable.

(5) Wide range of work: The fixture can be used to process one side and two sides at the same time, and it can also process similar products with similar dimensions. It has strong versatility and is easy to switch between similar products.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Description of marks in the figure:

1-Clamp body, 2-Fixed block, 3-Moveable block, 4-Return spring, 5-Spring guide post, 6-Support seat, 7-Support arm, 8-Hydraulic prop, 9-Hydraulic cylinder, 10-Hydraulic Oil pipe, 11- main hydraulic cylinder, 12- pressurized stud, 13- allen key, 14- workpiece, 15- magnetic table, 16- movable connecting rod.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

In the following embodiments or embodiments, if there is no special description of functional components or structures, it is indicated that they are all conventional components or structures used in the art to achieve corresponding functions.

The present invention proposes a hydraulic clamp for grinding a double plane of a step shaft, the structure of which is shown in FIG. 1 , and includes a worktable, a clamp body 1 installed on the worktable, a fixed block 2 and a movable block 3. The said The fixed block 2 is fixedly arranged beside the positioning reference plane at the top of the clamping body 1, the movable block 3 has the degree of freedom to move up and down along the direction perpendicular to the positioning reference plane, and the fixed block 2 and the movable block 3 are oppositely arranged The side surface of the workpiece 14 is processed into an inclined plane, so that a positioning gap for fixing the step shaft is formed between the fixed block 2 and the movable block 3. During operation, the workpiece 14 is placed at the position attached to the inclined surface of the fixed block 2, and then the movable block 3 is driven. Press down, so that the workpiece 14 is clamped between the positioning gap between the fixed block 2 and the movable block 3, and at the same time, due to the setting of the inclined plane, a downward component force will be generated on the workpiece 14, thereby ensuring that the workpiece 14 is tightened. Stick the positioning reference surface, so as to achieve high positioning accuracy and consistency.

In a specific embodiment, please refer to FIG. 1 again, the clip body 1 has a hollow cavity, and a vertical through-hole movable through hole is processed on the top of the clip body 1. The hollow cavity There is also a movable link 16 in the body, one end of the movable link 16 passes through the movable through hole and is connected to the movable block 3, and the other end is connected to a driving member arranged in the hollow cavity, and is driven up and down by the driving member move.

In a more specific embodiment, please refer to FIG. 1 again, the driving member includes a support base 6, a support arm 7, a hydraulic cylinder 9 and a main hydraulic cylinder 11, wherein the main hydraulic cylinder 11 is provided with a There is an adjustable pressurizing stud 12, the hydraulic supporting cylinder 9 is provided with a supporting hydraulic column that is driven by hydraulic oil to move up and down, and the hydraulic oil pipe 10 is used to communicate between the main hydraulic cylinder 11 and the supporting hydraulic cylinder 9. , the middle of the support arm 7 is rotatably arranged on the support base 6 , and the two ends of the support arm 7 are respectively movably connected to the support hydraulic column and the movable link 16 . The pressurizing stud 12 in the main hydraulic cylinder 11 can be adjusted by screwing to adjust the degree of its penetration, thereby adjusting the pressurization condition of the hydraulic oil in the cylinder.

In a further specific embodiment, the hydraulic support column and the movable connecting rod 16 are both machined with strip holes along the horizontal direction, the two ends of the support arm 7 are respectively rotatably installed with a connecting pin, the The connecting pin is also placed in the strip hole and can move back and forth along the strip hole. When the hydraulic support column moves vertically up and down to drive the end of the support arm 7 to lift or descend, and then drives the movable link 16 to move up and down, the connecting pin shaft moves back and forth in the bar hole to ensure the entire process. proceeded smoothly.

In a further specific embodiment, the hydraulic support cylinder 9 is provided with one or several, and when there are several hydraulic support cylinders 9, each hydraulic support cylinder 9 corresponds to a support arm 7 and a movable connecting rod 16 respectively. and activity block 3. More preferably, all the sub-hydraulic cylinders 9 share one main hydraulic cylinder 11 .

In a further specific embodiment, please refer to FIG. 1 again, the top of the pressure stud 12 is also provided with an inner hexagonal hole, and is screwed by an inner hexagonal wrench 13 matched with the inner hexagonal hole. The pressurizing stud 12 adjusts the pressing pressure of the pressurizing stud 12 on the hydraulic oil in the main hydraulic cylinder 11 .

In a more specific embodiment, referring to FIG. 1 again, a reset elastic member is further provided between the lower end of the movable link 16 and the bottom of the clamping body 1 . In a further specific embodiment, the reset elastic member includes a spring guide post 5 vertically arranged on the bottom of the clamping body 1, and a reset spring 4 sleeved on the spring guide post 5. The lower end is also processed with a guide cavity for the upper part of the spring guide column 5 to extend into, so that the spring guide column 5 and the movable link 16 can slide relatively along the moving direction of the movable block 3. The two ends of the return spring 4 are respectively Connect the movable link 16 and the clamp body 1 . When the oil pressure applied by the main hydraulic cylinder 11 drops (or returns to the initial state), the movable block 3 can move to the top dead center under the action of the return spring 4 to realize the loosening and loading of the product.

In a specific embodiment, please refer to FIG. 1 again, the fixed block 2 is provided with two spaced blocks on the top of the clamping body 1 opposite to each other, and the cross section of the movable block 3 is in the shape of an inverted isosceles trapezoid , and is located on the vertical line of the two fixed blocks 2 , and a positioning gap for fixing the step shaft is formed between the movable block 3 and each fixed block 2 respectively.

The above embodiments may be implemented individually, or may be implemented in any two or more combinations.

The above embodiments will be described in more detail below with reference to specific embodiments.

Example 1:

This embodiment proposes a hydraulic clamp for grinding the double plane of the step shaft, the structure of which is shown in FIG. 1 , including a worktable, a clamp body 1 installed on the worktable, and a fixed block 2 and a movable block 3. The block 2 is fixedly arranged beside the positioning datum surface on the top of the clamping body 1, the movable block 3 has the freedom to move up and down along the direction perpendicular to the positioning datum plane, and the side faces of the fixed block 2 and the movable block 3 opposite to each other are processed into a bevel shape, so that the A positioning gap for fixing the step shaft is formed between the fixed block 2 and the movable block 3. During operation, the workpiece 14 is placed at the position attached to the inclined surface of the fixed block 2, and then the movable block 3 is driven and pressed down, so that the workpiece 14 is clamped It is close to the positioning gap between the fixed block 2 and the movable block 3, and at the same time, due to the setting of the inclined plane, a downward component force will also be generated on the workpiece 14, thereby ensuring that the workpiece 14 is close to the positioning reference surface, so as to achieve a high degree of accuracy. High positioning accuracy and consistency.

Please refer to FIG. 1 again, the clamp body 1 has a hollow cavity, and the top of the clamp body 1 is also machined with a vertically penetrating movable through hole, and a movable connecting rod 16 is also arranged in the hollow cavity. One end passes through the movable through hole and is connected to the movable block 3, and the other end is connected to the driving member arranged in the hollow cavity, and is driven by the driving member to move up and down.

Please refer to FIG. 1 again, the driving member includes a support base 6, a support arm 7, a hydraulic cylinder 9 and a main hydraulic cylinder 11, wherein the main hydraulic cylinder 11 is provided with an adjustable pressurizing stud 12, and the hydraulic cylinder 9 is provided with a supporting hydraulic column that is driven by hydraulic oil to move up and down. The main hydraulic cylinder 11 and the supporting hydraulic cylinder 9 are connected by a hydraulic oil pipe 10. The middle of the supporting arm 7 is rotated and arranged on the supporting seat 6. The ends are respectively movably connected to the hydraulic column and the movable connecting rod 16 . The pressurizing stud 12 in the main hydraulic cylinder 11 can be adjusted by screwing to adjust the degree of its penetration, thereby adjusting the pressurization condition of the hydraulic oil in the cylinder. Both the hydraulic support column and the movable connecting rod 16 are machined with strip holes along the horizontal direction. Both ends of the support arm 7 are rotated to install a connecting pin shaft. The connecting pin shaft is also placed in the strip hole, and can follow the strip The hole moves back and forth. When the hydraulic support column moves vertically up and down to drive the end of the support arm 7 to lift or descend, and then drives the movable link 16 to move up and down, the connecting pin shaft moves back and forth in the bar hole to ensure the entire process. proceeded smoothly. There is one or several supporting hydraulic cylinders 9 . When there are several supporting hydraulic cylinders 9 , each supporting hydraulic cylinder 9 corresponds to a supporting arm 7 , a movable link 16 and a movable block 3 respectively. More preferably, all the sub-hydraulic cylinders 9 share one main hydraulic cylinder 11 .

Please refer to FIG. 1 again, the top of the pressure stud 12 is also provided with an inner hexagon hole, and the pressure stud 12 is adjusted by screwing the pressure stud 12 through a hexagonal wrench 13 matching the inner hexagon hole. The pressurizing pressure of the hydraulic oil in the master hydraulic cylinder 11 .

Referring to FIG. 1 again, a reset elastic member is further provided between the lower end of the movable link 16 and the bottom of the clamping body 1 . In a further specific embodiment, the reset elastic member includes a spring guide post 5 vertically arranged at the bottom of the clamping body 1, and a reset spring 4 sleeved on the spring guide post 5, and the lower end of the movable link 16 is also processed to provide The upper part of the spring guide column 5 is inserted into the guide cavity, so that the spring guide column 5 and the movable link 16 can slide relative to each other along the moving direction of the movable block 3, and the two ends of the return spring 4 are respectively connected to the movable link 16 and the clamping body 1. . When the oil pressure applied by the main hydraulic cylinder 11 drops (or returns to the initial state), the movable block 3 can move to the top dead center under the action of the return spring 4 to realize the loosening and loading of the product.

Please refer to FIG. 1 again, the fixed block 2 is provided with two spaced apart pieces on the top of the clamping body 1, the cross section of the movable block 3 is in the shape of an inverted isosceles trapezoid, and is located on the mid-perpendicular line of the two fixed blocks 2, and A positioning gap for fixing the stepped shaft is formed between the movable blocks 3 and each of the fixed blocks 2 respectively.

The working principle of this embodiment is as follows:

There is a finely ground positioning reference surface on the clamping body 1. After the clamping body 1 is magnetically attracted to the magnetic table 15 (ie the table), the accuracy of the positioning reference surface is ensured, and then the workpiece 14 is placed on the fixing block 2 and the magnetic table. Between the movable blocks 3, when the Allen wrench 13 is tightened, the oil in the main hydraulic cylinder is pressurized and transmitted to the supporting hydraulic cylinder 9 through the hydraulic oil pipe 10, so that the hydraulic strut 8 pushes the support arm 7 to pull down the movable block 3, The inclined surface design of the movable block 3 enables the workpiece 14 to be closely positioned and clamped. When the hexagonal wrench is released, the oil pressure drops, the hydraulic strut 8 falls back, and the movable block 3 moves to the top dead center under the action of the return spring 4 , to achieve loose loading and unloading of products. In the process of product clamping, downward force is generated at the same time to ensure that the product is close to the positioning reference surface, so as to achieve high positioning accuracy and consistency.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. A hydraulic clamp for grinding the double plane of the step shaft, characterized in that it comprises a workbench, a clamp body installed on the workbench, and a fixed block and a movable block, and the fixed block is fixedly arranged on the top of the clamp body Next to the positioning datum plane, the movable block has the freedom to move up and down along the direction perpendicular to the positioning datum plane, and the side faces of the fixed block and the movable block opposite to each other are processed into a slope shape, so that the fixed block and the movable block are A positioning gap for fixing the stepped shaft is formed between them. 2 . The hydraulic clamp for grinding the double plane of the stepped shaft according to claim 1 , wherein the clamp body has a hollow cavity, and the top of the clamp body is also machined with a vertically penetrating movable channel. 3 . The hollow cavity is also provided with a movable link, one end of the movable link passes through the movable through hole and is connected to the movable block, and the other end is connected to the driving member arranged in the hollow cavity, and is connected by The driving part drives the up and down movement. 3 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 2 , wherein the driving member comprises a support seat, a support arm, a support hydraulic cylinder and a main hydraulic cylinder, wherein the The main hydraulic cylinder is provided with an adjustable pressurizing stud, the supporting hydraulic cylinder is provided with a supporting hydraulic column that is driven by hydraulic oil to move up and down, and a hydraulic oil pipe is used between the main hydraulic cylinder and the supporting hydraulic cylinder. The middle part of the support arm is rotatably arranged on the support seat, and the two ends of the support arm are respectively movably connected to the support hydraulic column and the movable link. 4 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 3 , wherein the hydraulic support column and the movable connecting rod are both machined with strip holes along the horizontal direction, and the The two ends of the supporting arm of the device are respectively rotatably installed with a connecting pin, which is also placed in the bar-shaped hole and can move back and forth along the bar-shaped hole. 5. A kind of hydraulic clamp for grinding the double plane of the step shaft according to claim 3, it is characterized in that, described support hydraulic cylinder is provided with one or several, when support hydraulic cylinder is provided with several, each Each hydraulic cylinder corresponds to a support arm, a movable link and a movable block respectively. 6 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 5 , wherein all the supporting hydraulic cylinders share one main hydraulic cylinder. 7 . 7. The hydraulic clamp for grinding the double plane of the step shaft according to claim 3, wherein the top end of the pressurized stud is also provided with an inner hexagonal hole, and is connected with the inner hexagonal hole through a The inner hexagon wrench matched with the hole rotates the pressurizing stud, so as to adjust the pressing pressure of the pressurizing stud on the hydraulic oil in the main hydraulic cylinder. 8 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 2 , wherein a reset elastic member is further provided between the lower end of the movable link and the bottom of the clamp body. 9 . 9 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 8 , wherein the reset elastic member comprises a spring guide post vertically arranged at the bottom of the clamp body, and a spring guide sleeve sleeved on the spring guide. 10 . The return spring on the column, the lower end of the movable link is also processed with a guide cavity for the upper part of the spring guide column to extend into, so that the spring guide column and the movable link can slide relatively along the moving direction of the movable block, so Both ends of the return spring are respectively connected to the movable link and the clamping body. 10 . The hydraulic clamp for grinding the double plane of the step shaft according to claim 1 , wherein the fixed block is provided with two spaced apart pieces on the top of the clamp body, and the cross section of the movable block is 10 . 10 . The shape of an inverted isosceles trapezoid is located on the vertical line of the two fixed blocks, and a positioning gap for fixing the step shaft is formed between the movable block and each fixed block respectively.

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