A clamping beam

Abstract

The present invention discloses a clamping beam, which belongs to the field of workpiece clamps. The clamping beam is composed of several segmented beams, including a rear pressure plate and a front cover plate fixed by end covers on both sides, a segmented beam is arranged in the middle of the front cover plate and the rear pressure plate, a clamping hole for accommodating the top of the upper beam is provided on the segmented beam, the head of the top of the upper beam is inserted into the clamping groove provided at the bottom of the segmented beam, and an expansion tube is arranged at the tail thereof, and the expansion tube drives the top of the upper beam to move into the clamping groove after the input gas or liquid pressure expands, thereby clamping the workpiece. The present invention adopts a segmented main structure to meet the processing and clamping requirements of workpieces of different lengths, and can also realize flexible assembly and subsequent maintenance.

Description

Technical Field

[0001] The invention belongs to a tooling fixture, and in particular relates to a clamping beam used for clamping workpieces during machining. Background Art

[0002] Machine tools are processing equipment that perform grinding, cutting, bending, drilling, etc. on workpieces. Their types include common CNC machine tools and lathes. The workpiece needs to be fixed during processing to complete stable processing operations, so the machine tool is equipped with special fixtures or matching tooling.

[0003] A fixture is a device used to fix the processing object in the mechanical manufacturing process so that it occupies the correct position to accept construction or inspection, also known as a fixture. Existing fixtures include a handle for locking, that is, after the workpiece is placed in the clamping part, the clamping component that cooperates with the workpiece is driven by the driving device to move relative to the workpiece to achieve the clamping of the workpiece, such as a longitudinal manual quick locking clamp and a horizontal manual quick locking clamp. Most of the existing clamping components are fixedly connected to the driving device. As the use time of the fixture increases, the above scheme will increase the degree of wear of the clamping component, which will adversely affect the clamping stability and accuracy. At the same time, the existing clamping components are also inconvenient to replace; in addition, the clamping components in the prior art are mostly clamped on the workpiece from the opposite side, which will cause the workpiece to be subjected to a clamping force in a single direction, so it is easy to cause the workpiece after clamping to shake and deviate from the set position. The prior art also includes a fixture for clamping a workpiece and a clamping device for fixing a workpiece, but it is driven by a cylinder or the like, and the control force is not flexible enough. Summary of the invention

[0004] Purpose of the invention: The present invention aims to provide a clamping beam which adopts a segmented beam combination design and an expansion tube to realize drive control of workpiece clamping.

[0005] Technical solution: A clamping beam, which is used for clamping workpieces. The clamping beam is composed of one or more segmented beams as the clamping body, and also includes a rear pressure plate and a front cover plate fixed by end covers on both sides. A segmented beam is arranged in the middle of the front cover plate and the rear pressure plate. A clamping hole for accommodating the top of the upper beam is opened on the segmented beam. The head of the top of the upper beam is inserted into the clamping groove opened at the bottom of the segmented beam, and an expansion tube is arranged at the tail end. The expansion tube drives the top of the upper beam to move into the clamping groove after the input gas or liquid pressure expands, thereby achieving the clamping of the workpiece.

[0006] Furthermore, a mounting groove is provided on the top of the segmented crossbeam, and the mounting groove is used to install a conversion handle, and the conversion handle is used to fix the clamping beam on the machine tool equipment.

[0007] Furthermore, the top of the upper beam includes a head portion penetrating the clamping hole, and a tail portion is provided with an arc portion, and the arc portion fits the expansion tube. The top of the upper beam includes a spring for releasing the clamping of the workpiece when the expansion tube is not under pressure. The expansion tube includes a connection cylinder or oil cylinder to provide gas pressure or liquid pressure.

[0008] Furthermore, the expansion pipe includes pressure supply at both ends or pressure supply at one side.

[0009] The end of the expansion pipe includes a control valve, and the control valve includes a pilot-operated one-way valve, a throttling solenoid valve and a locking valve.

[0010] The expansion tube is located in a limited cavity formed by the tail arc portion of the upper beam top and the accommodating groove on the rear pressure plate.

[0011] Furthermore, the top of the upper beam and the mounting grooves on the segmented cross beam are arranged in a linear manner, including one or more.

[0012] Beneficial effects: The present invention adopts a segmented combined clamping body structure, which can meet the needs of workpieces of different lengths, avoiding the hard pressure of pressure strips or pressure plates used in the prior art. The present invention uses an expansion tube for drive control, which makes the force more uniform and can also avoid the situation where a certain position point bulges out and causes the entire workpiece to be clamped loosely. Secondly, the present invention is simpler in structure than the prior art, which makes assembly and maintenance simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an overall structural diagram of the clamping beam of the present invention;

[0014] Figure 2 The structure of the clamping plate after the clamping beam is removed according to the present invention Figure 1 ;

[0015] Figure 3 is a schematic diagram of the side structure of the clamping beam of the present invention;

[0016] Figure 4 The structure of the clamping plate after the clamping beam is removed according to the present invention Figure 2 ;

[0017] Figure 5 It is a schematic diagram of the tail of the top of the upper beam and its installation on the segmented cross beam;

[0018] Figure 6 The structural explosion of the clamping beam of the present invention Figure 1 ;

[0019] Figure 7 It is a schematic diagram of the structure of the segmented beam;

[0020] Figure 8 It is a structural diagram of the top of the upper beam;

[0021] Fig. 9 The structural explosion of the clamping beam of the present invention Figure 2 ;

[0022] Fig.10 It is a schematic diagram of the end structure of the expansion tube. DETAILED DESCRIPTION

[0023] In order to explain the technical solution provided by the present invention in detail, further introduction is made in conjunction with the accompanying drawings of the specification.

[0024] The present invention provides a clamping beam for machining and clamping a workpiece 7, combined with Figure 1-10 As shown. The present invention can be composed of a plurality of segmented beams to form a clamping body, and a rubber expansion tube is used to achieve the clamping operation. The front and rear surfaces of the clamping beam are encapsulated by a front cover plate 2 and a rear pressure plate 1. The segmented beam 3 is located between the front cover plate 2 and the rear pressure plate 1. According to the length of the workpiece 7, one or more combinations can be set to form a straight line arrangement. The structure of the segmented beam 3 can be seen in Figure 7 As shown, a clamping groove 6 for clamping a workpiece 7 is provided at the bottom. The side plate opening of the clamping groove 6 includes mounting holes 11 and bolts for fixing, and also includes a clamping hole 5. The clamping hole 5 is connected to the interior of the clamping groove 6. The ends of the front cover plate 2 and the rear pressure plate 1 are fixedly connected via the end cover 10. A conversion handle 9 is provided at the top of the front cover plate 2 and the rear pressure plate 1, which is also the top of the segmented beam 3, through the mounting groove 301. The conversion handle 9 is used to fix the clamping beam in a machine tool, or to cooperate with a processing machine on an operating table to process the workpiece 7. The fixing of several segmented beams 3 is also achieved through the conversion handle 9. Remove the rear pressure plate 1, and you can see Figure 2 and Figure 4 In the structure shown in FIG. 1 , the top of the segmented cross beam 3 can be connected by a conversion handle 9, and an upper beam head 4 is arranged in a clamping hole 5 on the segmented cross beam 3. The structure of the upper beam head 4 can be seen in FIG. Figure 8 The head 401 of the upper beam head 4 passes through the clamping hole 5, and can be set to a cylinder or a cube following the structure of the clamping hole 5, and its tail 402 is set to an arc, such as Figure 8 As shown, there is a curved surface for fitting with the expansion tube 8 for bearing pressure. When the expansion tube 8 in contact with the tail 402 is inflated with air or oil, it will expand, thereby driving the head 401 to move into the clamping groove 6 to resist the workpiece 7 to achieve fixation. When the expansion tube 8 is depressurized, the tank body shrinks, and further a spring can be set at the tail 402 of the upper beam top 4 and the side wall section of the segmented cross beam 3, thereby achieving resetting, that is, releasing the clamping force on the workpiece 7.

[0025] For the expansion tube 8, one-way pressure supply or two-end pressure supply can be realized. One-way pressure supply means that one end of the expansion tube 8 is connected to the air cylinder or oil cylinder for control so that it is pressurized and expanded. During the expansion process, the other end of the expansion tube 8 is sealed. When a certain pressure is reached, the pressure supply is stopped and the pressure is maintained. The workpiece 7 can be clamped. When it needs to be released, the closed end of the expansion tube 8 opens the control valve to release the gas or oil. Double-sided pressure supply means that both ends of the expansion tube 8 are connected to the air cylinder (air pump) or oil cylinder (oil pump). After reaching a certain pressure, the pressure is maintained, and then the pressure is released from both ends of the expansion tube 8. For one-way pressure supply or two-end pressure supply, control valves 801 (electronic valves) can be set at both ends of the expansion tube 8, including the use of pilot one-way valves, throttling solenoid valves and locking valves.

Claims

1. A clamping beam, the clamping beam is used for clamping processing of workpieces, characterized in that: The clamping beam is composed of one or more segmented beams (3) as a clamping body, and also includes a rear pressure plate (1) and a front cover plate (2) fixed by end covers (10) on both sides, wherein the segmented beam (3) is arranged in the middle of the front cover plate (2) and the rear pressure plate (1), and a clamping hole (5) for accommodating an upper beam head (4) is provided on the segmented beam (3), and the head of the upper beam head (4) is inserted into a clamping groove (6) provided at the bottom of the segmented beam (3), and the tail of the upper beam head (4) is in contact with an expansion tube (8), and the expansion tube (8) is expanded under pressure after gas or liquid is input, driving the head of the upper beam head (4) to move into the clamping groove (6), thereby achieving clamping of the workpiece (7); The top of the segmented crossbeam (3) is provided with a mounting groove (301), the mounting groove (301) is used to mount a conversion handle (9), the conversion handle (9) is used to fix the clamping beam on the machine tool equipment, and the conversion handle (9) realizes the combined fixation of a plurality of segmented crossbeams (3); The upper beam head (4) comprises a head portion (401) penetrating the clamping hole (5), and a tail portion (402) thereof is provided with an arc portion, and the arc portion fits the expansion tube (8); The expansion tube (8) is located in a limited cavity formed by the arc portion of the tail (402) of the upper beam top (4) and the accommodating groove on the rear pressure plate (1).

2. The clamping beam according to claim 1, characterized in that The upper beam head (4) includes a spring for releasing the clamping of the workpiece (7) when there is no pressure from the expansion tube (8).

3. The clamping beam according to claim 1, characterized in that The expansion pipe (8) includes a connection cylinder or an oil cylinder to provide gas pressure or liquid pressure.

4. The clamping beam according to claim 1, characterized in that The expansion pipe (8) includes pressure supply at both ends or pressure supply at one side.

5. The clamping beam according to claim 1, characterized in that The end of the expansion pipe (8) includes a control valve (801), and the control valve (801) includes a pilot-operated one-way valve, a throttling solenoid valve and a locking valve.

6. The clamping beam according to claim 1, characterized in that The upper beam top (4) and the mounting groove (301) located on the segmented cross beam (3) are arranged in a linear manner, including one or more arrangements.

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