Pneumatic clamping mechanism facilitating stable clamping

Abstract

The utility model provides a pneumatic clamping mechanism convenient for stable clamping, which comprises a pneumatic telescopic device and a clamped sample supporting seat which are arranged on a base, and the pneumatic telescopic device comprises a pneumatic bin and a telescopic rod. The pneumatic bin is fixed to the base and drives the telescopic rods to oppositely move back and forth in the horizontal direction. The clamped sample supporting seat is arranged on the outer side of the extending tail end of the telescopic rod, and a mounting groove matched with a clamped sample is formed in the top face of the clamped sample supporting seat. A mounting disc is mounted at the end, away from the pneumatic bin, of the telescopic rod, and a push plate is detachably and fixedly mounted on the disc face of the side, back to the telescopic rod, of the mounting disc. And a clamping mechanism matched with a clamped sample is arranged on one side, back to the mounting disc, of the push plate. According to the utility model, through the matched clamping of the push plate and the clamped sample supporting seat, the clamped sample can be stably and conveniently clamped under the pushing and pressing action provided by the pneumatic telescopic device.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping devices, in particular to a pneumatic clamping mechanism which is convenient for stable clamping. Background Technique

[0002] Aluminum is the most abundant metallic element on the earth. After being made into aluminum alloy, it has the advantages of low density, high specific strength, good corrosion resistance, good thermal stability, good mechanical processing performance, stable recycling performance, high recycling efficiency and low cost. At present, the advanced manufacturing processes of aluminum alloy mainly include: laser welding, hydroforming, squeeze casting and high-vacuum die-casting process, etc. Compared with other manufacturing processes, the die-casting forming process has high production efficiency, high dimensional accuracy, excellent mechanical properties, high material utilization rate and better economic benefits for mass production.

[0003] Die-cast aluminum alloy is the most commonly used one in aluminum alloys, and its consumption accounts for about 70% of the total consumption of cast aluminum alloy products. However, the mechanical properties of die-cast aluminum alloy are slightly insufficient. For a typical die-cast Al-Si aluminum alloy, ZL101 aluminum alloy, its tensile strength is only about 150 MPa. Therefore, the existing technology commonly uses friction stir processing technology to treat and strengthen the substrate.

[0004] The friction stir processing technology needs to use a non-consumable rotating tool with a needle head and a shoulder to process the substrate. During the friction stir processing, the tool rotates at a high speed and is inserted into the workpiece under the action of the axial force until the shoulder contacts the surface of the workpiece, generating friction. Then, the tool moves relative to the workpiece along the processing direction. At this time, a large amount of heat is generated by the friction between the shoulder and the workpiece. Under the action of the friction heat, the temperature of the substrate in the processing area rises, making the material soften, and strong plastic deformation is caused by the rotation and movement of the needle head. Finally, the material is re-formed under plastic flow.

[0005] Therefore, during the friction stir strengthening process, the cast aluminum alloy sample will be affected by the torque of the stir head and vibrate and shift. This vibration and shift will seriously affect the accuracy of processing. Therefore, a fixture is needed to clamp the sample. However, the existing fixtures have problems of unstable clamping on the one hand and inconvenient removal and installation of the clamped sample on the other hand, which affect the efficiency and effect of the friction stir strengthening treatment. Content of the Utility Model

[0006] To address the deficiencies of the existing technology, the present utility model provides a pneumatic clamping mechanism that facilitates stable clamping, including: a pneumatic telescopic device and a clamped sample support base installed on a base. The pneumatic telescopic device includes a pneumatic chamber and a telescopic rod. The pneumatic chamber is fixed on the base and drives the telescopic rod to move back and forth horizontally in opposite directions. The air inlet end of the pneumatic chamber is connected to an external high-pressure air source through a high-pressure air opening and closing valve. The clamped sample support base is arranged at an outer position at the end where the telescopic rod extends, and its top surface is provided with an installation groove matching the clamped sample.

[0007] One end of the telescopic rod away from the pneumatic chamber is installed with an installation disk, and a push plate is detachably and fixedly installed on the side disk surface of the installation disk facing away from the telescopic rod. A clamping mechanism matching the clamped sample is provided on the side of the push plate facing away from the installation disk, and the thickness of the push plate is such that when the telescopic rod is in the extended state, the clamping mechanism of the push plate matches the clamped sample support base to form a clamp on the clamped sample.

[0008] Further, several threaded holes are provided on the installation disk, and at least two T-shaped holes matching the positions of the threaded holes on the installation disk are provided in the area outside the clamping mechanism of the push plate. A threaded nail passes through the T-shaped hole and is screwed into the threaded hole, so that the push plate is fixed on the installation disk.

[0009] Further, the clamping mechanism of the push plate includes: a first limiting groove extending above the clamped sample support base and having a shape matching the top shape of the clamped sample at the bottom.

[0010] Further, the clamping mechanism of the push plate includes: a second limiting groove provided on the side surface facing the clamped sample and having a shape matching the shape of the corresponding surface of the clamped sample.

[0011] Further, the clamped sample support base is provided with a guide pin insertion hole, and a guide pin is provided at a position corresponding to the guide pin insertion hole on the side surface of the push plate facing the clamped sample.

[0012] Further, several installation screw holes are provided on the base, and the pneumatic chamber and the clamped sample support base are screwed and fastened to the installation screw holes on the base through screws.

[0013] Further, a limiting stop block is detachably and fixedly installed around the pneumatic chamber and / or the clamped sample support base on the base.

[0014] Further, a telescopic rod limiting plate is provided between the pneumatic chamber and the push plate. A sliding hole through which the telescopic rod passes is provided at a position corresponding to the telescopic rod on the telescopic rod limiting plate.

[0015] Further, the telescopic rod limiting plate is installed at a position close to the pneumatic chamber, and it is ensured that the clamped sample can be easily taken out after the push plate retracts.

[0016] Further, a flow regulating device is provided at the air inlet end of the pneumatic chamber.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. By the matching clamping of the push plate and the clamped sample support seat, the present utility model can form a stable clamping of the clamped sample under the pushing action provided by the pneumatic telescopic device.

[0019] 2. The present utility model mainly drives the push plate through the pneumatic telescopic device to form a compressive clamping of the clamped sample. Therefore, the telescopic movement of the pneumatic telescopic device can be controlled by opening and closing the valve with high-pressure air, so as to conveniently realize the clamping or release of the clamped sample. Moreover, after the clamping state is released, the clamped sample is easy to take out and install, significantly improving the efficiency of this working link. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side structure schematic diagram of the present utility model.

[0021] Figure 2 It is a side structure schematic diagram of the present utility model in another direction.

[0022] In the figure: 1, base; 2, pneumatic telescopic device; 201, pneumatic chamber; 2011, air inlet end; 2012, flow regulating device; 202, telescopic rod; 203, mounting plate; 3, push plate; 301, first limiting groove; 302, second limiting groove; 303, guide pin; 4, clamped sample; 5, clamped sample support seat; 501, guide pin jack; 6, high-pressure air opening and closing valve; 7, limiting block; 8, telescopic rod limiting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model.

[0024] Please note that the "upper", "lower", "left", "right", "top", "top end", "bottom end", "bottom" and other terms used by the present utility model to describe the positional relationship do not represent the absolute positional relationship between each module / component / assembly / part / element, but the relative positional relationship between each module / component / assembly / part / element.

[0025] Embodiment 1

[0026] A pneumatic clamping mechanism for facilitating stable clamping, as Figure 1 and Figure 2As shown in the figure, it includes a pneumatic telescopic device 2 installed on a base 1 and a clamped sample support seat 5. The pneumatic telescopic device 2 includes a pneumatic chamber 201 and a telescopic rod 202. The pneumatic chamber 201 is fixed on the base 1 and drives the telescopic rod 202 to move back and forth horizontally in opposite directions. The air inlet end 2011 of the pneumatic chamber 201 is communicated with an external high-pressure air source through a high-pressure air opening and closing valve 6. The clamped sample support seat 5 is arranged at the outer position of the extended end of the telescopic rod 202, and its top surface is provided with an installation groove matching the clamped sample 4.

[0027] An installation disk 203 is installed at one end of the telescopic rod 202 away from the pneumatic chamber 201. A push plate 3 is detachably and fixedly installed on the disk surface of the installation disk 203 facing away from the telescopic rod 202. A clamping mechanism matching the clamped sample 4 is provided on the side of the push plate 3 facing away from the installation disk 203. The thickness of the push plate 3 is such that when the telescopic rod 202 is in the extended state, the clamping mechanism of the push plate 3 matches the clamped sample support seat 5 to form a clamp on the clamped sample 4.

[0028] The usage process of this device is as follows: First, close the high-pressure air opening and closing valve 6, so that the telescopic rod 202 of the pneumatic telescopic device 2 retracts, driving the push plate 3 to retract and leave the matching position with the clamped sample support seat 5. At this time, the clamped sample 4 can be conveniently placed into the installation groove. Then, start the high-pressure air opening and closing valve 6, so that the telescopic rod 202 of the pneumatic telescopic device 2 extends, pushing the push plate 3 to extend and move to the matching position with the clamped sample support seat 5, and jointly forming a clamp on the clamped sample 4 with the clamped sample support seat 5. Then, the high-pressure air opening and closing valve 6 maintains the air pressure, so that the pneumatic telescopic device 2 continuously applies pressure to the clamped sample 4 through the telescopic rod 202 and the push plate 3, so that the clamped sample 4 maintains the stability of the clamp during the friction stir strengthening process. Finally, after the friction stir strengthening process is completed, the high-pressure air opening and closing valve 6 controls the high-pressure air in the pneumatic telescopic device 2 to be discharged, so that the telescopic rod 202 retracts, and then the push plate 3 retracts and leaves the matching position with the clamped sample support seat 5. At this time, the processed clamped sample 4 can be conveniently taken out and a new clamped sample 4 to be processed can be put in.

[0029] When replacing the clamped sample 4 with a new configuration for the friction stir strengthening process, the current push plate 3 can be removed from the installation disk 203, and a push plate 3 matching the new configuration of the clamped sample 4 can be replaced, and the above working process can be carried out.

[0030] It can be seen that through the matching clamping of the push plate and the clamped sample support seat, the present utility model can form a stable clamping of the clamped sample under the pushing action provided by the pneumatic telescopic device. Moreover, the present utility model mainly drives the push plate through the pneumatic telescopic device to form a compressive clamping of the clamped sample. Therefore, the telescopic movement of the pneumatic telescopic device can be controlled by opening and closing the valve with high-pressure air, so as to conveniently realize the clamping or release of the clamped sample. And after the clamping state is released, the clamped sample is easy to take out and install, significantly improving the efficiency of this working link.

[0031] Embodiment 2

[0032] Based on the pneumatic clamping mechanism for facilitating stable clamping in Embodiment 1, as Figure 1 and Figure 2 shown, several threaded holes are provided on the mounting plate 203, and two or three or four or the number required by other design needs of T-shaped holes matching the positions of the threaded holes on the mounting plate 203 are provided in the area outside the clamping mechanism of the push plate 3. The threaded nails pass through the T-shaped holes and are screwed with the threaded holes, so that the push plate 3 is fixed on the mounting plate 203.

[0033] This setting makes the push plate 3 detachably and fixedly installed on the mounting plate 203 by means of screw connection, and it is convenient for users to replace the corresponding push plate 3 according to needs.

[0034] Embodiment 3

[0035] Based on the pneumatic clamping mechanism for facilitating stable clamping in Embodiment 1, as Figure 1 and Figure 2 shown, the clamping mechanism of the push plate 3 includes: a first limiting groove 301 extending above the clamped sample support seat 5 and having a shape matching the top outer shape of the clamped sample 4 at the bottom.

[0036] This setting can jointly form upper and lower clamping of the clamped sample 4 through the first limiting groove 301 and the installation groove of the clamped sample support seat 5, thereby restricting the up and down displacement of the clamped sample 4 and improving the stability of clamping.

[0037] Embodiment 4

[0038] Based on the pneumatic clamping mechanism for facilitating stable clamping in Embodiment 1, as Figure 1 and Figure 2 shown, the clamping mechanism of the push plate 3 includes: a second limiting groove 302 provided on one side surface facing the clamped sample 4 and having a shape matching the corresponding surface outer shape of the clamped sample 4.

[0039] This setting can jointly form lateral clamping of the clamped sample 4 through the second limiting groove 302 and the installation groove of the clamped sample support seat 5, thereby restricting the lateral displacement of the clamped sample 4 and improving the stability of clamping.

[0040] Example 5

[0041] Based on the pneumatic clamping mechanism for stable clamping in Example 1, as Figure 1 and Figure 2 shown, the clamped sample support base 5 is provided with a guide pin insertion hole 501, and a guide pin 303 is provided at a position corresponding to the guide pin insertion hole 501 on one side of the push plate 3 facing the clamped sample 4.

[0042] This setting can, through the matching of the guide pin 303 and the guide pin insertion hole 501, on the one hand, enable the push plate 3 to accurately move to the matching position for clamping the clamped sample 4 when being pushed out. On the other hand, the guide pin 303 can share the lateral vibration force during the friction stir strengthening treatment of the clamped sample 4, improving the stability of clamping.

[0043] Example 6

[0044] Based on the pneumatic clamping mechanism for stable clamping in Example 1, as Figure 1 and Figure 2 shown, several mounting screw holes are provided on the base 1, and the pneumatic chamber 201 and the clamped sample support base 5 are screwed and fastened to the mounting screw holes of the base 1 through screws.

[0045] This setting can conveniently change and adjust the mounting positions of the pneumatic chamber 201 and the clamped sample support base 5 on the base 1 as needed, thereby improving the applicability of the clamping mechanism.

[0046] Example 7

[0047] Based on the pneumatic clamping mechanism for stable clamping in Example 1, as Figure 1 and Figure 2 shown, a limit stop block 7 is detachably and fixedly mounted around the pneumatic chamber 201 and / or the clamped sample support base 5 on the base 1.

[0048] This setting can improve the mounting stability of the pneumatic chamber 201 and the clamped sample support base 5 through the limit stop block 7, and prevent the pneumatic chamber 201 and the clamped sample support base 5 from undergoing force displacement during the friction stir strengthening treatment of the clamped sample 4, thus affecting the processing accuracy.

[0049] Example 8

[0050] Based on the pneumatic clamping mechanism for stable clamping in Example 1, as Figure 1 and Figure 2 shown, a telescopic rod limit plate 8 is provided between the pneumatic chamber 201 and the push plate 3. A sliding hole for the telescopic rod 202 to pass through is provided at a position corresponding to the telescopic rod 202 on the telescopic rod limit plate 8.

[0051] The telescopic rod limiting plate 8 is installed near the pneumatic chamber 201, and it is ensured that the clamped sample 4 can be easily taken out after the push plate 3 retracts.

[0052] The added telescopic rod limiting plate 8 can provide limiting and supporting functions for the movement of the telescopic rod 202. On the one hand, it can limit the movement direction of the telescopic rod 202, so that the push plate 3 can accurately move to the matching position for clamping the clamped sample 4 when it is pushed out. On the other hand, it can share the force of the telescopic rod 202 when the telescopic rod 202 is in the extended state, avoiding the telescopic rod 202 from being bent due to force.

[0053] Embodiment 9

[0054] Based on the pneumatic clamping mechanism for stable clamping in Embodiment 1, as Figure 1 and Figure 2 shown, a flow regulating device 2012 is provided on the air inlet end 2011 of the pneumatic chamber 201.

[0055] This setting can adjust the high-pressure air flow entering the pneumatic chamber 201 as needed, so as to adjust and control the movement speed of the telescopic rod 202.

[0056] Inspired by the above ideal embodiments according to the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A pneumatic clamping mechanism facilitating stable clamping, characterized in that, Comprising: A pneumatic telescopic device (2) and a clamped sample support base (5) installed on a base (1). The pneumatic telescopic device (2) includes a pneumatic chamber (201) and a telescopic rod (202); the pneumatic chamber (201) is fixed on the base (1) and drives the telescopic rod (202) to move back and forth horizontally in opposite directions; the air inlet end (2011) of the pneumatic chamber (201) is communicated with an external high-pressure air source through a high-pressure air opening and closing valve (6); the clamped sample support base (5) is arranged at an outer position of the extended end of the telescopic rod (202), and its top surface is provided with an installation groove matching the clamped sample (4). One end of the telescopic rod (202) far from the pneumatic chamber (201) is installed with a mounting disc (203), and a push plate (3) is detachably and fixedly installed on the side surface of the mounting disc (203) facing away from the telescopic rod (202); a clamping mechanism matching the clamped sample (4) is provided on the side surface of the push plate (3) facing away from the mounting disc (203), and the thickness of the push plate (3) is such that when the telescopic rod (202) is in the extended state, the clamping mechanism of the push plate (3) matches the clamped sample support base (5) to clamp the clamped sample (4).

2. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein A plurality of threaded holes are provided on the mounting disc (203), and at least two T-shaped holes matching the positions of the threaded holes on the mounting disc (203) are provided in the area of the push plate (3) outside the clamping mechanism. Threaded nails pass through the T-shaped holes and are screwed with the threaded holes, so that the push plate (3) is fixed on the mounting disc (203).

3. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein, The clamping mechanism of the push plate (3) includes: a first limiting groove (301) extending above the clamped sample support base (5) and having a shape matching the top of the clamped sample (4) at the bottom.

4. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein, The clamping mechanism of the push plate (3) includes: a second limiting groove (302) provided on the side surface facing the clamped sample (4) and having a shape matching the corresponding surface of the clamped sample (4).

5. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, characterized in that, The clamped sample support base (5) is provided with a guide pin insertion hole (501), and a guide pin (303) is provided at a corresponding position on the side surface of the push plate (3) facing the clamped sample (4).

6. The pneumatic clamping mechanism facilitating stable clamping according to claim 1, wherein A plurality of mounting screw holes are provided on the base (1), and the pneumatic chamber (201) and the clamped sample support base (5) are screwed and fastened to the mounting screw holes of the base (1) through screws.

7. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein, A limiting block (7) is detachably and fixedly installed around the pneumatic chamber (201) and / or the clamped sample support base (5) on the base (1).

8. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein A telescopic rod limiting plate (8) is provided between the pneumatic chamber (201) and the push plate (3); a sliding hole through which the telescopic rod (202) passes is provided at a corresponding position of the telescopic rod (202) on the telescopic rod limiting plate (8).

9. The pneumatic clamping mechanism for facilitating stable clamping according to claim 8, characterized in that, The telescopic rod limiting plate (8) is installed at a position close to the pneumatic chamber (201), and it is ensured that the clamped sample (4) is easy to take out after the push plate (3) retracts.

10. The pneumatic clamping mechanism for facilitating stable clamping according to claim 1, wherein A flow regulating device (2012) is provided on the air inlet end (2011) of the pneumatic chamber (201).

Images