A universal clamp

Abstract

A kind of general fixture relates to machining technical field, bottom plate is bolted with body, cavity is provided in body, thin-walled cylinder is provided in cavity, gas supply seat A is also provided on bottom plate, gas supply seat A is connected with the upper portion of thin-walled cylinder by gas pipe C, gas pipe D is connected with the lower portion of thin-walled cylinder, gas pipe C, gas pipe D control the up-and-down movement of thin-walled cylinder, the upper portion of body is also bolted with hydraulic expanding core mould, gas supply seat B is also provided on bottom plate, gas supply seat B is also connected with the through hole of workpiece base by gas pipe A and gas pipe B, hydraulic oil is stored in the inner chamber of hydraulic expanding core mould, negative pressure cavity is arranged in the middle of inner chamber.The beneficial effects of the present application are that the present application not only reduces the machining process of complex curved surface parts, improves workpiece machining precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of general mechanical parts, in particular to a general fixture for machine tools. BACKGROUND

[0002] In the mechanical field, during the machining process of general mechanical parts, it is usually necessary to first clamp and fix the overall part before machining. Therefore, various fixtures for machining have been derived in the mechanical field, but the existing general fixtures often need to be replaced and positioned multiple times during the machining of a workpiece with a complex surface, so as to process a complete part, which not only is low in efficiency, but also is prone to reduce the machining precision due to repeated positioning. SUMMARY

[0003] The present application solves the problem that the fixture does not need to be replaced multiple times during the machining of a workpiece, and in order to facilitate quick fixing and positioning of the workpiece, a gas suction and bolt connection mode is adopted to position the workpiece by negative pressure suction, and a clamping groove is processed on the outside of the base, which can be used for three-jaw chuck clamping. In addition, the overall gas circuit of the general fixture is connected to the inside of the machine tool through the air pipe, which can improve the safety during use.

[0004] In order to solve the above problems, the present application provides a general fixture, characterized in that a body (3) is fixed on a bottom plate (1), a cavity (4) for placing a thin-wall air cylinder (5) is arranged in the body (3), a gas supply seat A (2) is arranged on the bottom plate (1), the gas supply seat A (2) is connected in communication with the thin-wall air cylinder (5) through an air pipe C (14) and an air pipe D (15), a hydraulic expansion core mold (11) is further fixed on the top of the body (3) through a bolt, the inner cavity (19) of the hydraulic expansion core mold (11) stores hydraulic oil, a negative pressure cavity (21) is arranged in the middle of the inner cavity (19), and a workpiece base (17) is clamped on the top of the hydraulic expansion core mold (11) through a memory alloy (20); a gas supply seat B (8) is further arranged on the bottom plate (1), a through hole (17-1) is arranged in the workpiece base (17), and the gas supply seat B (8) is connected in communication with the through hole (17-1) of the workpiece base (17) through an air pipe A (9) and an air pipe B (10); the bottom of the through hole (17-1) is connected in communication with the negative pressure cavity (21), and the top of the through hole (17-1) is connected in communication with the workpiece (18) through negative pressure suction.

[0005] The air pipe C (14) is connected in communication with the upper part of the thin-wall air cylinder (5), the air pipe D (15) is connected in communication with the lower part of the thin-wall air cylinder (5), and the air pipe C (14) and the air pipe D (15) control the up-and-down movement of the thin-wall air cylinder.

[0006] The negative pressure cavity (21) is a cylinder with an open top and a sealed bottom, the top of the inner cavity (19) is sealed with a memory alloy, and the bottom is sealed with a bottom plate A (23).

[0007] Air enters through the air pipe D (15), the piston inside the thin-walled cylinder (5) moves upward, and the bottom plate of the hydraulic expansion mold (11) connected to the thin-walled cylinder (5) moves upward. Under the action of hydraulic oil, the bottom plate of the hydraulic expansion mold (11) moves upward to compress its internal space, causing the memory gold (20) above the hydraulic expansion mold (11) to expand under force and clamp the workpiece base (17) sleeved on the hydraulic expansion mold (11). The workpiece base (17) is tightly connected to the hydraulic expansion mold (11).

[0008] The air pipe B (10) introduces negative pressure, which is generated through the through hole (17-1) and the negative pressure chamber (21) to attract the workpiece (18) together with the workpiece base (17) and the hydraulic expansion mold (11), and the workpiece (18) is fixed. After the processing is completed, the air pipe A (9) is vented to break the pressure, the internal negative pressure disappears, and the workpiece (18) can be removed.

[0009] Four lifting rings (16) are provided on the base plate (1).

[0010] The air supply seat A (2) is connected to the air pump through the sealing connector (7), and the air supply seat B (8) is connected to the vacuum pump through the sealing connector (7).

[0011] The bottom of the body (3) is fixedly connected to the base plate (1) by a flange (22) and bolts B (13), and the top is fixedly connected to the hydraulic expansion mold (11) by bolts A (12).

[0012] The beneficial effects of this invention are as follows: This device can achieve the goal of completing the processing by positioning the workpiece once. Moreover, this device can be fixed on a machine tool or connected to a three-jaw chuck. This not only reduces the processing steps of complex curved parts and improves the processing accuracy of the workpiece, but also further improves the versatility of the device and ultimately improves production efficiency and production quality. Attached Figure Description

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

[0014] Figure 2 This is a side view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the present invention.

[0016] Figure 4 This is the front view of the present invention;

[0017] Figure 5 This is a BB cross-sectional view of the present invention;

[0018] Figure 6 This is an exploded view of the present invention;

[0019] Figure 7 Structure diagram of the badge base of embodiment 2 of the present application;

[0020] In the figure: 1, bottom plate, 2, air supply seat A, 3, body, 4, cavity, 5, thin-walled cylinder, 6, flange plate, 7, connecting piece, 8, air supply seat B, 9, air pipe A, 10, air pipe B, 11, hydraulic expanding core mold, 12, bolt A, 13, bolt B, 14, air pipe C, 15, air pipe D, 16, lifting ring, 17, workpiece base, 18, workpiece, 19, inner cavity, 20, memory gold, 21, negative pressure cavity, 22, flange plate, 23, bottom plate A, 24, badge base, 25, clamping piece, 26, badge. Embodiment

[0021] Embodiment 1, refer to the attached Figure 1As shown, a general fixture, the bottom plate 1 is a square plate, the bottom plate 1 is provided with a bolt hole for fixing and other purpose hole, the bottom plate 1 is bolted with the body 3, the body 3 is provided with a cavity 4 for placing the thin-walled cylinder 5, the body 3 is a barrel-shaped with the bottom and the upper part open, the bottom plate 1 is also provided with a gas supply seat A2 capable of realizing inflation and deflation, the gas supply seat A2 is connected with the upper part of the thin-walled cylinder 5 through the air pipe C14, the air pipe D15 is connected with the lower part of the thin-walled cylinder 5, the air pipe C14 and the air pipe D15 control the up and down movement of the thin-walled cylinder, the air pipe C14 makes the piston of the thin-walled cylinder 5 move downward, the air pipe D15 makes the piston move upward, the upper part of the body 3 is also bolted with the hydraulic expanding core mold 11, the bottom plate 1 is also provided with a gas supply seat B8, the gas supply seat B8 is also connected with the through hole 17-1 of the workpiece base 17 through the air pipe A9 and the air pipe B10, the inner cavity 19 of the hydraulic expanding core mold 11 stores hydraulic oil, the negative pressure cavity 21 is arranged in the middle part of the inner cavity 19, the negative pressure cavity 21 is a cylinder with the upper part open and the bottom sealed, the top of the inner cavity 19 is sealed with a memory alloy, the bottom is sealed with the bottom plate A23, the bottom plate A23 can move up and down on the bottom of the inner cavity 19, the bottom plate A23 can be provided with a sealing ring to form a closed inner cavity 19 with the hydraulic expanding core mold 11, the air pipe D15 is filled with air, the piston inside the thin-walled cylinder 5 moves upward, the bottom plate A23 of the hydraulic expanding core mold 11 in contact with the thin-walled cylinder 5 moves upward, under the action of the hydraulic oil, the bottom plate of the hydraulic expanding core mold 11 moves upward to compress the internal space, the memory gold 20 above the hydraulic expanding core mold 11 expands under stress, the memory gold 20 clamps the workpiece base 17 sleeved on the hydraulic expanding core mold 11, the memory gold 20 is a circular ring, the workpiece base 17 is tightly connected with the hydraulic expanding core mold 11; the inner part of the workpiece base 17 is provided with a through hole 17-1, the bottom of the through hole 17-1 is connected with the negative pressure cavity 21, the top of the through hole 17-1 adsorbs the workpiece 18; the air pipe B10 is connected with negative pressure, and the negative pressure cavity 21 generates negative pressure through the through hole 17-1, so that the workpiece 18, the workpiece base 17 and the hydraulic expanding core mold 11 are adsorbed together, the workpiece 18 is fixed, and a layer of sealing rubber gasket is added between the workpiece 18 and the workpiece base 17 if necessary; after the machining is completed, the air pipe A9 is filled with air to break the pressure, the internal negative pressure disappears, and the workpiece 18 can be taken out. The workpiece base 17 of the embodiment is the base of the butter lamp, that is, the workpiece 18 of the embodiment is a butter lamp, different workpiece bases can be added according to different workpieces, such as the base of the impeller, the base of a particularly large butter lamp, and the base of other workpieces.

[0022] The bottom plate 1 is provided with four lifting rings 16.

[0023] The gas supply seat A2 and the gas supply seat B8 are connected with the vacuum pump through the sealing connector 7.

[0024] The bottom of the body 3 is fixedly connected with the bottom plate 1 through the bolt B13, and the top is fixedly connected with the hydraulic expanding core mold 11 through the bolt B13.

[0025] The hydraulic core mold 11 is also fixedly connected with the part base through the bolt A12. Embodiment 2

[0026] In order to simplify the structure of the present application, a single air pipe universal clamp is provided in this embodiment, and the rest of the structure is the same as that in Embodiment 1. The air supply seat A2 and the air supply seat B8 only use one air pipe. The air supply seat A2 is connected with the lower part of the thin-walled cylinder 5 through the air pipe D15. The air pipe D15 inflates the thin-walled cylinder 5, and the piston of the thin-walled cylinder 5 moves upward. The air pipe D15 deflates the thin-walled cylinder 5, and the piston of the thin-walled cylinder 5 moves downward, thereby realizing the expansion under stress and the contraction without stress of the memory gold 20 in Embodiment 1. The air supply seat B8 is also provided on the bottom plate 1, and the air supply seat B8 is connected with the through hole 17-1 of the workpiece base 17 through the air pipe A9. The air pipe A9 is connected with the negative pressure adsorption workpiece 18. After the machining is completed, the air pipe A9 is ventilated and broken, the internal negative pressure disappears, and the workpiece 18 can be taken out. The school badge base 24 is a base for manufacturing the school badge 26, and the structure principle is the same as that in Embodiment 1. The top of the school badge base 24 is provided with two or more clamping pieces 25 for horizontally fixing the school badge 26. The clamping pieces 25 are integrally formed with the school badge base 24 or are welded on the top edge. The bottom of the school badge 26 is fixed on the school badge base 24 through negative pressure adsorption.

Claims

1. A universal clamp characterized in that, The bottom plate (1) is fixed with the body (3), the cavity (4) for placing the thin-walled cylinder (5) is arranged in the body (3), the air supply base A (2) is arranged on the bottom plate (1), the air supply base A (2) is communicated with the thin-walled cylinder (5) through the air pipe C (14) and the air pipe D (15), the hydraulic expanding core mold (11) is further fixed on the top of the body (3) through bolts, the inner cavity (19) of the hydraulic expanding core mold (11) stores hydraulic oil, the negative pressure cavity (21) is arranged in the middle of the inner cavity (19), the workpiece base (17) is clamped on the top of the hydraulic expanding core mold (11) through the memory gold (20), the air supply base B (8) is further arranged on the bottom plate (1), the through hole (17-1) is arranged in the workpiece base (17), the air supply base B (8) is further communicated with the through hole (17-1) of the workpiece base (17) through the air pipe A (9) and the air pipe B (10), the bottom of the through hole (17-1) is communicated with the negative pressure cavity (21), the top of the through hole (17-1) is communicated with the workpiece (18) through negative pressure adsorption, the air pipe C (14) is communicated with the upper part of the thin-walled cylinder (5), the air pipe D (15) is communicated with the lower part of the thin-walled cylinder (5), the air pipe C (14) and the air pipe D (15) control the up-down movement of the thin-walled cylinder, the negative pressure cavity (21) is a cylinder with an open top and a sealed bottom, the top of the inner cavity (19) is sealed by the memory alloy, and the bottom is sealed by the bottom plate A (23), the air pipe D (15) is used for air intake, the piston in the thin-walled cylinder (5) moves upwards, the bottom plate of the hydraulic expanding core mold (11) connected with the thin-walled cylinder (5) moves upwards, under the action of the hydraulic oil, the bottom plate of the hydraulic expanding core mold (11) moves upwards to compress the internal space, the memory gold (20) above the hydraulic expanding core mold (11) is forced to expand and tightly clamps the workpiece base (17) on the hydraulic expanding core mold (11), and the workpiece base (17) is tightly connected with the hydraulic expanding core mold (11), the air pipe B (10) is used for introducing negative pressure, and the negative pressure cavity (21) generates negative pressure to adsorb the workpiece (18), the workpiece base (17) and the hydraulic expanding core mold (11) together, and the workpiece (18) is fixed, after the machining is completed, the air pipe A (9) is used for air intake to break the pressure, the internal negative pressure disappears, and the workpiece (18) can be taken out.

2. A universal fixture as claimed in claim 1, wherein, Four lifting rings (16) are arranged on the bottom plate (1).

3. A universal fixture as claimed in claim 1, wherein, The air supply base A (2) is communicated with the air pump through the sealing connector (7), and the air supply base B (8) is communicated with the vacuum pump through the sealing connector (7).

4. The universal fixture of claim 1, wherein, The bottom of the body (3) is fixedly connected with the bottom plate (1) through the flange plate (22) and the bolt B (13), and the top is fixedly connected with the hydraulic expanding core mold (11) through the bolt A (12).

5. A universal fixture as claimed in claim 1, wherein, The air supply base A (2) and the air supply base B (8) use only one air pipe, the air supply base A (2) is connected with the lower part of the thin-walled cylinder (5) through the air pipe D (15), the air pipe D (15) fills the thin-walled cylinder (5) with air, the piston of the thin-walled cylinder (5) moves upward, the air pipe D (15) discharges the thin-walled cylinder (5), the piston of the thin-walled cylinder (5) moves downward, the memory gold (20) expands under stress and shrinks without stress; the bottom plate (1) is further provided with the air supply base B (8), the air supply base B (8) is further connected with the through hole (17-1) of the workpiece base (17) through the air pipe A (9), the air pipe A (9) is connected with the negative pressure adsorption workpiece (18); after the machining is completed, the air pipe A (9) is connected with air to break the pressure, the internal negative pressure disappears, and the workpiece (18) can be removed.

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