Self-cleaning pneumatic gripper

Abstract

The utility model discloses a kind of self-cleaning pneumatic clamps, it is related to lathe clamp technical field, including clamp base, clamping module, self-cleaning mechanism and clamp switch;Clamping module contains middle clamp component and side clamp component, realize workpiece multidirectional clamping;Self-cleaning mechanism's self-cleaning pipeline is accessed cylinder loop by three-way joint, detachably assembled in the plug-in hole of side clamp component, and simultaneously aeration when clamp loosens workpiece, blows off and places position debris;First cylinder bottom is detachable cushion block, adapts different specification workpiece.The utility model does not need independent gas source, low in cost, start quickly, saves artificial cleaning time;Cushion block can be flexibly adjusted height, adaptability is strong, simultaneously through multidirectional clamping and reinforcing block guarantee clamping precision, applicable to the efficient processing of multi-specification workpiece.

Description

Technical Field

[0001] This utility model relates to the field of machine tool fixture technology, specifically a self-cleaning pneumatic fixture. Background Technology

[0002] In the field of machine tool processing, fixtures are core components that ensure workpiece machining accuracy and improve machining efficiency. Existing pneumatic fixtures generally only have the function of workpiece clamping. After machining, metal shavings, wire shavings and other debris are easily left at the workpiece placement position, which requires manual cleaning by workers or hand-held air guns. This not only occupies extra time and reduces production efficiency, but may also lead to deviations in the clamping accuracy of subsequent workpieces due to untimely cleaning.

[0003] Meanwhile, the existing fixtures have weak height adjustment capabilities and poor adaptability to irregular workpieces of different thicknesses and shapes. When replacing the entire fixture, the large size and heavy weight of the fixture not only make the operation complicated but also easily lead to clamping errors, making it difficult to meet the batch processing needs of workpieces of various specifications.

[0004] In view of the shortcomings of the existing technology, there is an urgent need for a pneumatic clamp that integrates self-cleaning function, is low in cost, starts up quickly and is highly adaptable, so as to solve the problems of time-consuming manual cleaning, high equipment cost and poor adaptability. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a self-cleaning pneumatic clamp, which overcomes the problems of existing clamps having no self-cleaning function and requiring manual cleaning of debris, or relying on an independent air source, resulting in high cost and slow start-up, as well as the defects of existing clamps having poor adaptability and being unable to adapt to the clamping height requirements of different specifications and irregular shapes of workpieces.

[0006] A self-cleaning pneumatic clamp includes: a clamp base, a clamping module, a self-cleaning mechanism, and a clamp switch.

[0007] The fixture base is mounted on the machine tool and is used to connect and install other components of the fixture.

[0008] The clamping module is located on the upper surface of the fixture base and is used to clamp the workpiece. The clamping module includes: a central clamping assembly, which is assembled in the middle of the upper surface of the fixture base and has several sets arranged along the length of the fixture base. It is used to support and clamp the workpiece and clamp the upper and lower sides of the workpiece; and side clamping assemblies, which are assembled on the front and rear sides of the central clamping assembly and are used to clamp the sides of the workpiece.

[0009] The self-cleaning mechanism is used to clean the clamping position of the workpiece on the middle clamping assembly. It includes a self-cleaning pipeline and a self-cleaning mounting structure. The self-cleaning pipeline is detachably mounted on the side clamping assembly through the self-cleaning mounting structure. The self-cleaning pipeline is connected to the cylinder pipeline of the middle clamping assembly and the side clamping assembly to obtain a pneumatic air source.

[0010] The clamp switch, mounted on the clamp base, is used to control the opening and closing of the clamping module and the self-cleaning mechanism. The clamp switch includes a valve seat mounted on the clamp base and a valve stem mounted on the valve seat. When the valve stem rotates horizontally clockwise, the clamping module clamps the workpiece and the self-cleaning pipeline is closed. When the valve stem rotates horizontally counterclockwise, the clamping module and the self-cleaning pipeline are opened.

[0011] As a preferred embodiment of this utility model, the central clamping assembly includes a first cylinder and a support block mounted on the clamping base. The support block is positioned on both the front and rear sides of the first cylinder. A placement position for placing a workpiece is provided on the upper surface of the support block. A pressure rod is fixedly connected to the extended end of the first cylinder, which is horizontally positioned. A pressure block is fixedly installed on the lower end of the pressure rod corresponding to the placement position. The pressure block is used to press down on the workpiece in the placement position. The first cylinder can drive the pressure rod to lift, lower, and rotate, thereby clamping the workpiece.

[0012] As a preferred embodiment of this utility model, the clamping module on the fixture base is configured as two groups, left and right, and each clamping module has two symmetrical front and rear working positions in the horizontal direction; the middle clamping component of the clamping module is configured as three, left, middle and right; a reinforcing block is provided in the blank area between the three middle clamping components, and the reinforcing block is vertically installed on the fixture base; the upper end of the reinforcing block is flush with the placement position, and is used to provide support for the workpiece together with the placement position to prevent the workpiece from deforming downward during processing due to its large span; a first inclined surface is provided on the upper edge of the placement position to prevent scratching the workpiece and the hands of the workers when placing the workpiece.

[0013] As a preferred embodiment of the present invention, the side clamping assembly includes a second cylinder, which is horizontally mounted on the side of the support block; the extended end of the second cylinder extends forward and backward; a movable plate is fixedly mounted on the extended end of the second cylinder, and a support is integrally formed at the upper oblique position of the movable plate, and a clamping block is fixedly mounted inside the support; the extended end of the second cylinder drives the clamping block to clamp the side of the workpiece by retracting.

[0014] As a preferred embodiment of this utility model, the self-cleaning installation structure includes a first insertion hole on the support and a second insertion hole on the clamping block; the first and second insertion holes are on the same axis and are the same size; the first and second insertion holes are positioned correspondingly; the self-cleaning pipeline is detachably installed in the first and second insertion holes via insertion; an annular protrusion is integrally formed in the first insertion hole, and the outer edge of the annular protrusion is designed with a bevel structure to facilitate the assembly of the self-cleaning pipeline; the self-cleaning pipeline and the annular protrusion are interference-fitted; the self-cleaning pipeline is connected to the first and second cylinders via a tee connector. The pipeline is controlled by a clamp switch to open and close. When the middle clamp assembly and the side clamp assembly open (i.e., release the workpiece), the self-cleaning pipeline circulates air to clean the placement position. The specific linkage logic is as follows: when the valve stem rotates counterclockwise (the clamping module opens and the workpiece is released), the first and second cylinders switch to the reset air supply circuit and are in the reset state. The self-cleaning pipeline is simultaneously connected to the reset air supply circuit and continues to blow air. After the workpiece that has been processed is taken out and the next workpiece is put in, the valve stem rotates clockwise (the clamping module clamps the workpiece), the first and second cylinders switch to the clamping air supply circuit, and the self-cleaning pipeline closes synchronously with the circuit switching.

[0015] As a preferred embodiment of this utility model, a limit ring is integrally formed inside the second insertion hole to limit the front end of the self-cleaning pipeline.

[0016] As a preferred embodiment of this utility model, the second insertion hole is provided with a tapered flare on the side near the placement position. The tapered flare is used to increase the air blowing area and avoid incomplete cleaning.

[0017] As a preferred embodiment of this utility model, a detachable pad is installed between the bottom of the first cylinder and the fixture base. The detachable pad allows the middle fixture assembly to adapt to different heights of the irregularly shaped workpiece.

[0018] As a preferred embodiment of this utility model, an end limiting baffle is fixedly installed on the fixture base. The end limiting baffle is set at the end of the workpiece and is used for positioning and limiting the workpiece.

[0019] By adopting the above technical solution, this utility model has the following beneficial effects:

[0020] 1. The self-cleaning mechanism is directly connected to the original cylinder circuit of the fixture, eliminating the need for additional independent air source and control components, which significantly reduces equipment costs. Furthermore, the self-cleaning mechanism is linked to the opening and closing of the fixture. When the fixture opens and releases the workpiece, the air blowing is started simultaneously, eliminating the need for manual operation. The fast start-up response can quickly blow away residual debris and shavings in the placement position, saving manual cleaning time and improving processing continuity.

[0021] 2. The height of the middle fixture assembly can be flexibly adjusted by the detachable pad, which can adapt to irregular workpieces of different thicknesses and shapes without replacing the entire fixture, reducing the frequency of component replacement, reducing the complexity of operation, and improving the processing and adaptation efficiency of multi-specification workpieces.

[0022] 3. The middle clamping assembly clamps the workpiece from the top and bottom, the side clamping assembly clamps the workpiece from the side, and the end limiting baffles position the workpiece at the end. Together with the reinforcing blocks, they prevent the workpiece from slipping during machining, forming a multi-directional positioning and clamping structure that effectively ensures the workpiece clamping accuracy and reduces machining errors. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly state of the fixture and the workpiece of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of the clamp of this utility model;

[0025] Figure 3 This is an enlarged view of the right half of the fixture structure of this utility model;

[0026] Figure 4 This is a first cross-sectional view of the self-cleaning installation structure of this utility model;

[0027] Figure 5 This is a second sectional view of the self-cleaning installation structure of this utility model;

[0028] Figure 6 This is a cross-sectional view of the self-cleaning installation structure and self-cleaning pipeline assembly state of this utility model.

[0029] Figure 7 This is a schematic diagram of the workpiece processed according to the present invention.

[0030] In the diagram: 1. Fixture base; 2. Middle fixture assembly; 201. First cylinder; 202. Pressure rod; 203. Pressure block; 204. Support block; 205. Placement position; 206. First inclined surface; 3. Side fixture assembly; 301. Second cylinder; 302. Moving plate; 303. Support; 304. Clamping block; 4. Fixture switch; 401. Valve seat; 402. Valve stem; 5. Self-cleaning mounting structure; 501. First insertion hole; 502. Second insertion hole; 503. Limiting ring; 504. Annular protrusion; 505. Conical flare; 6. End limiting baffle; 7. Pad; 8. Reinforcing block; 9. Workpiece; 10. Self-cleaning pipeline. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Example 1

[0033] The machine tool model used is PYB-CNC2500S; the workpiece being machined is: automotive air conditioning cooling bracket W01-782-1; the machining method is: drilling and milling; the length direction of the fixture base is set to left and right, the width direction to front and back, and the height direction to up and down.

[0034] like Figures 1 to 7 As shown, a specific embodiment of the self-cleaning pneumatic clamp of this utility model includes:

[0035] Fixture base 1: It is fixedly assembled on the machine tool worktable by bolts and is used to install other components of the fixture, providing stable support for the overall structure;

[0036] Clamping module: Located on the upper surface of the fixture base 1, it is used to achieve multi-directional clamping and positioning of workpiece 9. It is set into two groups, left and right, each group containing two symmetrical stations in the lateral and front and rear directions, for a total of four stations. It can clamp four workpieces 9 simultaneously, improving processing efficiency. It includes:

[0037] Middle clamp assembly 2: Mounted at the center of the upper surface of clamp base 1, with three components (left, center, and right) arranged along the length of clamp base 1. The first cylinder 201 is bolted to clamp base 1. A removable pad 7 (made of aluminum alloy, thickness optional) is placed between the bottom of the left and right first cylinders 201 and clamp base 1. The first cylinders 201 on the left and right sides are threaded upwards through clamp base 1 and mounted on the pad. The pad 7 is used to conform to the surface of workpiece 9. The support block 204 is connected to the clamp base with countersunk screws. 1. The upper end of the first cylinder 201 is provided with a groove 205 on the front and rear sides, which is adapted to the workpiece 9. The upper edge of the groove is provided with a first inclined surface 206 to avoid scratching the hand and the surface of the workpiece 9 when placing the workpiece 9. A pressure rod 202 is fixedly connected to the top end of the extended end of the first cylinder 201. A rubber pressure block 203 is fixed below the pressure rod 202 by a countersunk screw to prevent crushing the workpiece 9. In other embodiments, such as straight workpieces, the pad block is not required, and Z-shaped workpieces can use the pad block only at one end.

[0038] Side clamp assembly 3: The second cylinder 301 is horizontally mounted on the side of the support block 204 by countersunk screws. The extended end of the cylinder is fixedly connected to the moving plate 302 by threads. The moving plate 302 is integrally cast with a support 303 on the upper side. The inner side of the support 303 is fixed with a clamping block 304 by countersunk screws (a wear-resistant rubber pad is pasted on the inner side of the clamping block 304).

[0039] The first cylinder 201 is a rotary lifting cylinder capable of 90° rotation (such as a rotary lifting cylinder of model MSQB10A). The operation process from the reset state to the clamping state is as follows: first, drive the pressure rod 202 to rotate horizontally 90° to above the placement position 205, and then drive the extended end downward to clamp the workpiece 9 through the pressure block 203; when releasing the workpiece, first reset the extended end upward, and then rotate 90° away from above the workpiece. It adopts existing products and the principle and structure are existing technologies. This solution has not improved it, so its principle will not be described in detail.

[0040] Self-cleaning mechanism: The first insertion hole 501 of the self-cleaning installation structure 5 is opened in the middle of the support 303, and the second insertion hole 502 is opened in the center of the clamping block 304. The two holes have the same diameter and are coaxially arranged. An annular protrusion 504 is integrally formed in the first insertion hole 501. The self-cleaning pipeline 10 is made of PU material hose, which forms an interference fit with the annular protrusion 504 to ensure a firm connection and sealing. A tapered flare 505 is provided on the side of the second insertion hole 502 near the placement position 205 to expand the air blowing coverage area. The self-cleaning pipeline 10 is connected to the reset air supply circuit of the first cylinder 201 and the second cylinder 301 through a T-type three-way connector. One end of the T-type three-way connector is connected to the first cylinder 201 and the second cylinder 301 through an air supply pipe, one end is connected to the valve seat 401 through an air supply pipe, and one end is connected to the self-cleaning pipeline 10. The clamp switch 4 controls the on / off of the self-cleaning pipeline 10 and the cylinder.

[0041] Clamp switch 4: Valve seat 401 is fixed to the front side of the upper end of clamp base 1 by bolts. Valve stem 402 is horizontally inserted into valve seat 401. When valve stem 402 is rotated clockwise, the pneumatic circuit is vented. The first cylinder 201 drives the pressure rod 202 to rotate and descend to clamp workpiece 9. The second cylinder 301 drives the clamping block 304 to clamp the side of workpiece 9. When valve stem 402 is rotated counterclockwise, the first cylinder 201 and the second cylinder 301 reset and release workpiece 9. The self-cleaning pipeline 10 is connected to the reset air supply circuit of the driving cylinder. At the same time as the cylinder resets, the self-cleaning pipeline 10 is vented. Compressed air is blown to the placement position 205 through the conical flare 505 to clean residual debris.

[0042] Auxiliary components: A reinforcing block 8 (flush with the placement position 205) is fitted in the blank area between the three central clamping assemblies 2 using countersunk screws to prevent the long strip workpiece 9 from sagging during processing; an end limit baffle 6 is bolted to one end of the clamping base 1 (located at...). Figure 1 , 2 The middle position of the upper surface of the fixture base 1 is attached to the end of the workpiece 9 to achieve rapid positioning.

[0043] The working principle of this utility model is as follows: This utility model selects a pad 7 with an appropriate thickness according to the thickness of the workpiece 9 and places it on the bottom of the first cylinder 201 to adjust the height of the middle clamping assembly 2.

[0044] Place the workpiece 9 in the placement position 205 of the support block 204, and position the end of the workpiece in contact with the end limiting baffle 6.

[0045] Rotate valve stem 402 clockwise to circulate air in the pneumatic circuit: first cylinder 201 drives pressure rod 202 to rotate horizontally above workpiece 9, then moves it downwards and upwards, and pressure block 203 presses the upper and lower surfaces of workpiece; second cylinder 301 extends and retracts, driving clamping block 304 to clamp the side of workpiece, completing the clamping.

[0046] After the machine tool finishes processing the workpiece 9, the valve rod 402 is rotated counterclockwise, and the first cylinder 201 and the second cylinder 301 are reset and the workpiece is released; at the same time, the self-cleaning pipeline 10 is ventilated, and compressed air is blown into the placement position 205 through the conical flare 505, and then the workpiece is removed.

[0047] Since the air source continues to supply air and the valve stem 402 is not closed, the self-cleaning pipeline 10 will continue to blow air to blow off the debris and lint in the placement position 205.

[0048] Place the next workpiece in, rotate valve stem 402 clockwise, at which point first cylinder 201 and second cylinder 301 retract again to clamp the workpiece, self-cleaning pipeline 10 closes, and the next batch of workpieces is processed.

[0049] All components mentioned in this article are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0050] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A self-cleaning pneumatic clamp, characterized in that, include: The fixture base is mounted on the machine tool and is used to connect and install other components of the fixture. The clamping module is located on the upper surface of the fixture base and clamps the workpiece by means of a cylinder. The clamping module includes a central clamping assembly and a side clamping assembly, wherein: The middle clamping assembly is assembled in the middle of the upper surface of the clamping base, and several sets are arranged along the length of the clamping base. It is used to support and clamp the workpiece and clamp the upper and lower sides of the workpiece. The side clamping assembly is assembled on the front and rear sides of the central clamping assembly and is used to clamp the sides of the workpiece. The self-cleaning mechanism is used to clean the clamping position of the workpiece on the middle clamping assembly. It includes a self-cleaning pipeline and a self-cleaning mounting structure. The self-cleaning pipeline is detachably mounted on the side clamping assembly through the self-cleaning mounting structure. The middle clamping assembly and the side clamping assembly have clamping air supply circuits and reset air supply circuits. The self-cleaning pipeline is connected to the reset air supply circuit to obtain a pneumatic air source. The clamp switch, mounted on the clamp base, is used to control the opening and closing of the clamping module and the self-cleaning mechanism.

2. The self-cleaning pneumatic clamp according to claim 1, characterized in that: The central clamping assembly includes a first cylinder and a support block mounted on the clamping base. The support block is positioned on both the front and rear sides of the first cylinder. The upper surface of the support block has a placement position for placing the workpiece. The extended end of the first cylinder extends upward and is fixedly connected to a pressure rod. The pressure rod is horizontally positioned, and a pressure block is fixedly installed on the lower end of the pressure rod corresponding to the placement position. The pressure block is used to press down on the workpiece in the placement position. The first cylinder can drive the pressure rod to lift, lower, and rotate, thereby clamping the workpiece.

3. A self-cleaning pneumatic clamp according to claim 2, characterized in that: The clamping modules on the fixture base are configured in two groups, left and right. Each clamping module has two symmetrical front and rear working positions in the horizontal direction. The middle clamping components of the clamping module are configured in three groups, left, center and right. A reinforcing block is provided in the blank area between the three middle clamping components. The reinforcing block is vertically installed on the fixture base. The upper end of the reinforcing block is flush with the placement position and is used to provide support for the workpiece together with the placement position to prevent the workpiece from deforming downwards during processing due to its large span. A first inclined surface is provided on the upper edge of the placement position to prevent scratching the workpiece and the hands of the workers when placing the workpiece.

4. A self-cleaning pneumatic clamp according to claim 2, characterized in that: The side clamping assembly includes a second cylinder, which is horizontally mounted on the side of the support block; the extended end of the second cylinder extends forward and backward; a movable plate is fixedly mounted on the extended end of the second cylinder, and a support is integrally formed at the oblique upper position of the movable plate, with a clamping block fixedly mounted inside the support; the extended end of the second cylinder drives the clamping block to clamp the side of the workpiece by retracting.

5. A self-cleaning pneumatic clamp according to claim 4, characterized in that: The self-cleaning mounting structure includes a first insertion hole on the support and a second insertion hole on the clamping block; the first and second insertion holes are on the same axis and are the same size; the first and second insertion holes are positioned correspondingly; the self-cleaning pipeline is detachably installed in the first and second insertion holes via insertion; an annular protrusion is integrally formed in the first insertion hole, and the outer edge of the annular protrusion is set as a bevel structure to facilitate the assembly of the self-cleaning pipeline; the self-cleaning pipeline and the annular protrusion are interference fit; the self-cleaning pipeline is connected to the reset air supply circuit of the first and second cylinders through a three-way connector, and the on / off state is controlled by the clamp switch; while the middle clamping assembly and the side clamping assembly release the workpiece, the self-cleaning pipeline blows air to clean the placement position.

6. A self-cleaning pneumatic clamp according to claim 5, characterized in that: The second insertion hole has an integrally formed limit ring for limiting the front end of the self-cleaning pipeline.

7. A self-cleaning pneumatic clamp according to claim 5, characterized in that: The second insertion hole has a tapered flare on the side near the placement position. The tapered flare is used to increase the air blowing area and avoid incomplete cleaning.

8. A self-cleaning pneumatic clamp according to claim 2, characterized in that: A removable pad is fitted between the bottom of the first cylinder and the fixture base. The removable pad allows the middle fixture assembly to adapt to different heights of the irregularly shaped workpiece.

9. A self-cleaning pneumatic clamp according to claim 1, characterized in that: The clamp switch includes a valve seat mounted on a clamp base and a valve stem mounted on the valve seat; when the valve stem rotates horizontally clockwise, the clamping module clamps the workpiece and the self-cleaning pipeline closes; when the valve stem rotates horizontally counterclockwise, the clamping module and the self-cleaning pipeline open.

10. A self-cleaning pneumatic clamp according to claim 1, characterized in that: An end limiting baffle is fixedly installed on the fixture base. The end limiting baffle is set at the end of the workpiece and is used for positioning and limiting the workpiece.

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