CN205465343U - Pneumatic clamping device - Google Patents

Abstract

The utility model discloses a pneumatic clamping device, including the fixed clamping device who sets up on machine tool table upper portion and the pneumatic lifting device of lower part respectively, pneumatic lifting device includes the pneumatic cylinder, is provided with the piston that can follow its inner wall and reciprocate in the pneumatic cylinder, is provided with the piston rod on the piston, and the piston rod runs through machine tool table to be connected with clamping device for press from both sides tight work piece. This device convenient operation, accurate, the labour saving and time saving and efficient in location. The cylinder is located the following of workstation, has both saved the space, the weight that has alleviateed the workstation again. Pressing from both sides tightly the work piece through filling the pressure differential that arouses of exitting in two breather valves in the cylinder, having saved the manpower greatly, press from both sides simultaneously tightly reliably, the machining precision is higher.

Description

A pneumatic clamping device

【Technical field】

The utility model belongs to the field of machine tools, in particular to a pneumatic clamping device.

【Background technique】

Since the reform and opening up, my country's economy and technology have developed by leaps and bounds, and the gap with developed countries is gradually narrowing. For various manufacturing industries, we insist on introducing foreign advanced technology to develop our own economy. In recent years, the development of automobiles has been booming, and automobiles are no longer exclusive to the rich, but have begun to enter the homes of ordinary people. This has greatly promoted the development of my country's automobile manufacturing industry. The processing of various parts on automobiles is inseparable from machine tools. However, we have not made great changes to machine tools over the years. This not only limits our processing of parts, but also It has directly affected the development of our country's automobile manufacturing industry.

At present, we often use XL6036B horizontal milling machine in the production of automobile steering knuckle. In the production of automobile steering knuckle, when using XL6036B horizontal milling machine to mill the two ends of the swing arm, we often use the clamping device at the bearing hole. Put the bearing hole into a positioning pin, then put the upper and lower pressure plates and fix it with a suitable nut. The whole operation is very cumbersome, time-consuming and labor-intensive, which affects the production output of the steering knuckle. Although its original fixture can guarantee the normal production of automobile steering knuckle, it is very loaded down with trivial details for the fixation of parts, time-consuming and labor-intensive. And once the clamping work is not done well, it may cause large errors in the production of parts, resulting in unnecessary waste.

【Content of utility model】

The technical problem to be solved by the utility model is to provide a pneumatic clamping device with convenient operation, accurate positioning, time-saving and labor-saving, and high-efficiency in view of the shortcomings in the above-mentioned prior art.

The utility model adopts the following technical solutions:

A pneumatic clamping device, including a clamping device fixed on the upper part of the machine tool workbench and a pneumatic lifting device at the lower part, the pneumatic lifting device includes a pneumatic cylinder, and a piston that can move up and down along its inner wall is arranged in the pneumatic cylinder. A piston rod is provided, and the piston rod penetrates through the workbench of the machine tool and is connected with the clamping device for clamping the workpiece.

Preferably, the pneumatic cylinder is provided with a vent valve for charging and deflation of the pneumatic cylinder, and the interior of the pneumatic cylinder is divided into upper and lower cavities through the piston, and the pressure difference between the upper and lower cavities in the pneumatic cylinder is generated by adjusting the vent valve to control the piston of the mobile.

Preferably, the vent valve includes an upper vent valve and a lower vent valve respectively used to control and adjust the upper and lower chambers of the pneumatic cylinder.

Preferably, the clamping device includes a circular briquetting block, which is affixed to the protruding end of the piston rod, the outer diameter of the briquetting block is larger than the diameter of the piston rod, the bearing hole of the workpiece passes through the briquetting block and is set on the piston rod, and the workpiece A pressing plate for pressing the workpiece is arranged between the pressing block and the pressing block.

Preferably, the pressing plate includes an upper pressing plate and a lower pressing plate used in conjunction, and the pressing block is connected with the workpiece through the upper pressing plate and the lower pressing plate in sequence.

Preferably, the upper pressing plate is circular with a U-shaped opening, and the diameter of the bottom of the U-shaped opening is larger than the diameter of the piston rod, so that the upper pressing plate is inserted into the piston rod and pressed by the pressing block.

Preferably, the lower pressing plate is circular with a central hole, and the diameter of the central hole is larger than the outer diameter of the pressing block, so that the lower pressing plate can be fitted on the piston rod through the pressing block.

Preferably, the outer diameter of the upper pressing plate is larger than the diameter of the central hole of the lower pressing plate.

Preferably, a sealing device is provided between the piston rod and the machine table, the vent valve and the pneumatic cylinder to ensure the airtightness of the pneumatic cylinder.

Preferably, the workpiece comprises a steering knuckle.

Compared with the prior art, the utility model has at least the following beneficial effects: the device is convenient to operate, accurate in positioning, saves time and effort, and has high efficiency. The cylinder is located under the workbench, which not only saves space, but also reduces the weight of the workbench. The workpiece is clamped by the pressure difference caused by the inflation and discharge of the two ventilation valves of the cylinder, which greatly saves manpower, and at the same time, the clamping is reliable and the processing accuracy is high.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

【Description of drawings】

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of upper platen of the utility model;

Fig. 3 is a structural schematic diagram of the lower pressing plate of the present invention.

Among them: 1. Briquetting block; 2. Upper pressing plate; 3. Lower pressing plate; 4. Machine tool table; 5. Pneumatic cylinder; 6. Lower venting valve; 7. Lower venting valve sealing device; 8. Upper venting valve; 9. Upper ventilation valve sealing device; 10. Piston; 11. Piston rod sealing device; 12. Piston rod; 13. Workpiece.

【detailed description】

The utility model provides a pneumatic clamping device, which reforms the clamping at the bearing hole when milling the two ends of the lower swing arm of the steering knuckle, making it easy to operate and saving time and effort. It is mainly to change the original tightening of the nut on the gasket by external force into clamping by a pneumatic device. The cylinder is located under the workbench, and there is a round hole slightly larger than the piston in the workbench on the workbench, so that the piston rod of the cylinder under the workbench can pass through the round hole. When the workpiece is processed, the bearing hole of the workpiece is still Set it into the positioning pin of the workbench, and then put the upper and lower pressure plates.

See also shown in Fig. 1, the utility model discloses a kind of pneumatic clamping device, comprises the clamping device that is respectively fixedly arranged on the upper part of the machine tool table 4 and the pneumatic lifting device of the lower part, and the pneumatic lifting device comprises a pneumatic cylinder 5, a pneumatic cylinder 5 is provided with a piston 10 that can move up and down along its inner wall. The piston 10 is provided with a piston rod 12. The piston rod 12 runs through the machine tool table 4 and is connected with the clamping device for clamping the workpiece 13. The workpiece 13 includes a steering knuckle. The pneumatic cylinder 5 is provided with a vent valve for filling and deflated the pneumatic cylinder 5, and the interior of the pneumatic cylinder 5 is divided into upper and lower cavities by the piston 10, the upper cavity is connected with the upper vent valve 8, and the lower cavity and the lower vent valve 6 connection, by adjusting the breather valve to make the pressure difference between the upper and lower chambers in the pneumatic cylinder 5, and control the movement of the piston 10.

The clamping device specifically includes a circular briquetting block 1, which is affixed to the protruding end of the piston rod 12. The outer diameter of the briquetting block 1 is larger than the diameter of the piston rod 12. The upper pressing plate 2 and the lower pressing plate 3 are used to compress the workpiece 13, and the pressing block 1 is connected with the workpiece 13 through the upper pressing plate 2 and the lower pressing plate 3 in sequence. Specifically, the workpiece 13 is set on the piston rod 12 through the pressing block 1, the lower pressing plate 3 is set on the piston rod 12 through the pressing block 1 to press the workpiece 13, the upper pressing plate 2 is directly plugged on the piston rod 12, and is located at the bottom. Between the pressing plate 3 and the briquetting block 1, please refer to Fig. 2 and shown in Fig. 3, the upper pressing plate 2 is a circle with a U-shaped opening, the diameter of the bottom of the U-shaped opening is greater than the diameter of the piston rod 12, and the outer surface of the upper pressing plate 2 The diameter is greater than or equal to the outer diameter of the briquetting block 1, so that the upper pressing plate 2 is plugged on the piston rod 12 and pressed down by the briquetting block 1. The lower pressing plate 3 is circular with a central hole, and the diameter of the central hole is greater than the outer diameter of the briquetting block 1, so that the lower pressing plate 3 is sleeved on the piston rod 12 through the briquetting block 1 . In order to facilitate compacting, the outer diameter of the upper pressing plate 2 is greater than the diameter of the central hole of the lower pressing plate 3 .

Further, in order to ensure the airtightness of the pneumatic cylinder 5, a piston rod sealing device 11 is provided between the piston rod 12 and the machine table 4, and an upper vent valve sealing device 9 is provided between the upper vent valve 8 and the pneumatic cylinder 5 , A lower vent valve sealing device 7 is arranged between the lower vent valve 6 and the pneumatic cylinder 5 .

The specific working process includes: this device is mainly used for milling the lower end surface of the steering knuckle of an automobile. When the machine tool starts to work, the lower vent valve 6 on the cylinder 5 is first opened, and a certain amount of high-pressure gas is passed into it, and the upper and lower parts of the piston 10 A pressure difference is formed to push the piston 10 to move upward, the piston rod 12 passes through the worktable 4, and the top of the piston rod 12 is connected with the pressure block 1 to form a whole. After the piston 10 moves up for a certain distance, the workpiece 13 to be processed is placed on the workbench 4, and the bearing holes on the workpiece 13 are placed on the positioning pins on the workbench, and then the lower platen 3 and the upper platen 2 are put in. The diameter of the inner ring of the lower pressing plate is greater than the outer diameter of the pressing plate, so as to ensure that the lower pressing plate is inserted from the top of the pressing block, and the upper pressing plate is set as a U-shaped opening. After the lower pressing plate 3 and the upper pressing plate 2 are put away, open the lower ventilation on the cylinder 5 Valve 6, so that the piston 10 drives the pressing block 1 to move downwards. In order to ensure complete clamping, when the pressing block 1 is close to the upper platen 2, close the lower ventilation valve 6 above the cylinder 5, then open the upper ventilation valve 8 and ventilate it. A certain amount of high-pressure gas is injected, so that a pressure difference is formed between the upper and lower parts of the piston 10. Under the action of the pressure difference, the piston 10 moves down, and stops when the upper part of the piston 10 can hardly pass through the gas, and the clamping of the workpiece bearing hole direction is completed. .

Claims (10)

1. A pneumatic clamping device is characterized in that: comprise the clamping device that is respectively fixedly arranged on the top of the machine tool workbench (4) and the pneumatic lifting device of the bottom, said pneumatic lifting device comprises a pneumatic cylinder (5), said A piston (10) capable of moving up and down along its inner wall is arranged in the pneumatic cylinder (5), and a piston rod (12) is arranged on the piston (10), and the piston rod (12) runs through the machine tool table (4 ) is connected with the clamping device for clamping the workpiece (13). 2. A pneumatic clamping device according to claim 1, characterized in that: the pneumatic cylinder (5) is provided with a vent valve for charging and deflation of the pneumatic cylinder (5), through which the piston (10 ) divide the interior of the pneumatic cylinder (5) into upper and lower cavities, and adjust the vent valve to generate a pressure difference between the upper and lower cavities in the pneumatic cylinder (5) to control the movement of the piston (10). 3. A pneumatic clamping device according to claim 2, characterized in that the vent valve includes an upper vent valve (8) and a lower vent valve for controlling and adjusting the upper and lower chambers of the pneumatic cylinder (5) respectively. valve (6). 4. A pneumatic clamping device according to claim 1, characterized in that: the clamping device comprises a circular pressure block (1), and the connection between the pressure block (1) and the piston rod (12) One end is protruded and fixed, the outer diameter of the briquetting block (1) is larger than the diameter of the piston rod (12), and the bearing hole of the workpiece (13) passes through the briquetting block (1) and is sleeved on the piston On the rod (12), a pressing plate for pressing the workpiece (13) is arranged between the workpiece (13) and the pressing block (1). 5. A pneumatic clamping device according to claim 4, characterized in that: the pressing plate includes an upper pressing plate (2) and a lower pressing plate (3) used in conjunction, and the pressing block (1) passes through the The upper pressing plate (2) and the lower pressing plate (3) are connected with the workpiece (13). 6. A pneumatic clamping device according to claim 5, characterized in that: the upper pressing plate (2) is circular with a U-shaped opening, and the diameter of the bottom of the U-shaped opening is larger than that of the piston rod The diameter of (12) is convenient for the insertion of the upper pressing plate (2) on the piston rod (12) to be pressed by the pressing block (1). 7. A pneumatic clamping device according to claim 5, characterized in that: the lower pressing plate (3) is circular with a central hole, and the diameter of the central hole is larger than that of the pressure block (1) diameter, so that the lower pressing plate (3) can be fitted on the piston rod (12) through the pressing block (1). 8. A pneumatic clamping device according to claim 6 or 7, characterized in that: the outer diameter of the upper pressing plate (2) is larger than the diameter of the central hole of the lower pressing plate (3). 9. A pneumatic clamping device according to claim 2, characterized in that: the piston rod (12) and the machine tool table (4), the vent valve and the pneumatic cylinder (5) A sealing device is arranged between them to ensure the airtightness of the pneumatic cylinder (5). 10. A pneumatic clamping device according to claim 1, characterized in that the workpiece (13) comprises a steering knuckle.