Stamping part surface defect repairing device

Abstract

The utility model relates to the technical field of stamping production devices, in particular to a stamping part surface defect repairing device which comprises a control system and a repairing device body and further comprises a self-adaptive clamp, the self-adaptive clamp comprises a base plate, sliding blocks, vacuum suction cups and a locking assembly, the base plate is provided with sliding grooves in a honeycomb array, the sliding blocks are arranged in the sliding grooves in a sliding mode, and the vacuum suction cups are arranged in the sliding grooves. A spring is arranged between the sliding block and the ground surface of the sliding groove, the upper end of the sliding block is connected with a vacuum chuck through a ball-and-socket joint, an annular groove is formed in the side face of the sliding block, an elastic sealing ring is arranged in the annular groove, and a communicating hole is formed in the ground of the annular groove and communicated with an external high-pressure air source through a cavity formed in the sliding block. The spring is flexibly matched with the curved surface of the workpiece, then high-pressure gas acts to drive the locking assembly to act to position the sliding block, and finally the sliding block and a stamping part are connected through the vacuum suction cup, so that the rigid-flexible contradiction of a traditional clamp is solved, the curved-surface workpiece is effectively fixed, and meanwhile the surface of the workpiece is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to stamping production device technical field, concretely is a stamping part surface defect repairing device. BACKGROUND

[0002] In the stamping production process, the surface of the finished product of the stamping part may be scratched, dented, cracked and defective due to factors such as material, mold, process parameters or equipment, etc. For these products, after evaluation, the products that can be used are repaired by the stamping part surface defect repairing device. Common repair methods include grinding, laser cladding, etc. so that the performance of the workpiece meets the use requirements.

[0003] However, for the existing stamping part surface defect repairing device, when clamping the workpiece to be repaired, a commonly used clamping tool with a flat clamping surface is often used. When the surface of the workpiece to be repaired is curved, the clamping surface of the workpiece is often damaged or unstable. SUMMARY

[0004] The utility model aims at providing a stamping part surface defect repairing device with a self-adaptive workpiece curved surface and stable clamping workpiece to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A stamping part surface defect repairing device, comprising a control system, a repairing device body, and a self-adaptive clamp,

[0007] A plurality of sliding grooves are formed on the base plate, and a sliding block is arranged in the sliding groove.

[0008] The vacuum chuck is connected to the top end of the sliding block through a ball joint, the ball joint is provided with a locking function, and the vacuum chuck is connected to an external vacuum pump.

[0009] The locking assembly comprises an annular groove formed on the side surface of the sliding block, an elastic sealing ring is arranged in the annular groove, a communication hole is formed on the bottom surface of the annular groove, the communication hole is connected to an external high-pressure gas source through a cavity formed in the sliding block, and the high-pressure gas generated by the high-pressure gas source acts on the elastic sealing ring and makes it elastically expand to lock the sliding block.

[0010] Preferably, the side wall of the annular groove is provided with a tapered guide slope, and the included angle between the slope and the horizontal plane is 3 to 8 degrees, and the cross section of the elastic sealing ring is ladder-shaped.

[0011] The inner side of the elastic sealing ring is concave to form a sealing end, and the outer side forms a locking end, and the side of the sealing end is provided with an inclined surface matched with the tapered guide inclined surface, and the sealing end is in interference fit with the inner wall of the annular groove.

[0012] Preferably, the communication holes are circularly arranged, and the axes thereof are located on the upper and lower symmetry planes of the annular groove.

[0013] Preferably, an annular pressure sensor is arranged between the bottom surface of the sliding groove and the spring.

[0014] Preferably, the locking assembly is provided with at least two groups, and is equidistantly arranged along the side surface of the sliding block.

[0015] Preferably, the sliding grooves are arranged in a honeycomb array on the base plate.

[0016] Preferably, the vacuum chuck adopts a multi-layer bellows structure, and comprises at least two deformable wrinkle layers.

[0017] Preferably, the inner cavity of the sliding block is communicated with a distribution cavity arranged in the base plate through a spring air pipe, the distribution cavity is connected with a high-pressure gas source, and the number of the distribution cavities is not less than two groups.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] Through the spring, the flexible adaptation to the curved surface of the workpiece is realized first, then the locking assembly is driven to actuate the sliding block through the high-pressure gas, and finally the sliding block and the stamping part are connected through the vacuum chuck, so that the rigid-flexible contradiction of the traditional clamp is solved, the effective fixation of the curved surface workpiece is realized, and the surface damage of the workpiece is avoided.

[0020] On the other hand, through the multi-point cooperation of the honeycomb base plate, the ball-and-socket joint and the vacuum chuck, the full-automatic curved surface adaptation is realized, and the clamping efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a whole structure schematic diagram;

[0022] Figure 2 The utility model discloses a plan view of a single sliding block and other components after planing and cutting the base plate;

[0023] Figure 3 The utility model discloses a sectional view of the sliding block;

[0024] Figure 4 The utility model discloses Figure 3 The utility model discloses an enlarged view of A place.

[0025] In the figure: 1, base plate; 11, sliding slot; 12, distribution cavity; 2, sliding block; 21, cavity; 3, spring; 4, vacuum chuck; 5, ball joint; 6, locking assembly; 61, annular groove; 62, tapered guide slope; 63, elastic sealing ring; 64, sealing end; 65, locking end; 66, communication hole; 7, spring air pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The utility model provides a technical scheme:

[0028] Referring to Figure 1 , Figure 2 , a stamping part surface defect repairing device, including control system, repairing device body, still including self -adaptation clamp, self -adaptation clamp includes base plate 1, sliding block 2, vacuum chuck 4 and locking assembly 6,

[0029] A plurality of sliding slots 11 are formed in the base plate 1, and the sliding blocks 2 are slidably arranged in the sliding slots 11, and the springs 3 are arranged between the sliding blocks 2 and the bottom surfaces of the sliding slots 11;

[0030] The vacuum chuck 4 is connected to the top end of the sliding block 2 through the ball joint 5, the ball joint 5 is provided with a locking function, the vacuum chuck 4 is connected to the vacuum pump outside, the side wall of the connecting rod of the vacuum chuck 4 is provided with a connecting hole, and a flexible pipe is connected to the vacuum pump, in addition, the ball joint 5 is a commonly used component in an automatic device, in the application, the ball joint 5 provided with the locking function can be selected as an electromagnetic locking (suitable for repairing the surface defects of non-magnetic stamping parts) with a model of Heim Joints HJS-EL5 or a hydraulic locking with a model of Parker Hannifin SBP-12M, and other appropriate models can also be selected according to actual requirements;

[0031] Referring to Figure 3 , Figure 4 , the locking assembly 6 includes an annular groove 61 formed in the side surface of the sliding block 2, the annular groove 61 is provided with an elastic sealing ring 63, the bottom surface of the annular groove 61 is provided with a communication hole 66, the communication hole 66 is connected to the high-pressure gas source outside through the cavity 21 formed in the sliding block 2, the high-pressure gas generated by controlling the high-pressure gas source enters the annular groove 61 and acts on the elastic sealing ring 63, so that the elastic sealing ring 63 is elastically expanded, and then abuts against the side wall of the sliding slot 11, so that the position of the sliding block 2 is locked.

[0032] Referring toFigure 4 The side wall of the annular groove 61 is provided with a tapered guide slope 62, and the included angle between the slope and the horizontal plane is 3 to 8 degrees. The cross section of the elastic sealing ring 63 is ladder-shaped.

[0033] The inner side of the elastic sealing ring 63 is inwardly recessed to form a sealing end 64, and the outer side forms a locking end 65. The side surface of the sealing end 64 is provided with an inclined surface matched with the tapered guide slope 62. The sealing end 64 is in interference fit with the inner wall of the annular groove 61. In the present application, the interference amount is controlled in the range of 0.1-0.25mm. The elastic sealing ring 63 is made of low stiffness and high elasticity material such as hydrogenated nitrile rubber, with Shore hardness of 60-70HA (elastic modulus of 1.5-2.5MPa), and the surface is coated with a polytetrafluoroethylene coating (thickness of 10-20μm) to reduce the friction coefficient. By setting the tapered guide slope 62 and matching the inclined surface of the side surface of the sealing end 64 of the elastic sealing ring 63, the elastic sealing ring 63 is guided to expand outward. On the other hand, it avoids sealing failure during the elastic deformation of the elastic sealing ring 63. At the same time, the sealing end 64 formed by inwardly recessing can reduce the radial stiffness in the recessed part during the process of elastic expansion and sliding along the side wall of the annular groove 61, which can bend to a certain extent to release the interference pressure, thereby preventing the elastic sealing ring 63 from being stuck. In addition, according to the actual situation, a micro oil groove can be opened on the annular groove 61 to fill the lubricating grease (such as silicon-based grease), thereby reducing the sliding resistance.

[0034] The communication holes 66 are arranged in a circular array, and the axis is located on the upper and lower symmetry plane of the annular groove 61, so that the high-pressure gas filled in the annular groove 61 uniformly acts on the elastic sealing ring 63.

[0035] An annular pressure sensor (not shown in the figure) is arranged between the bottom surface of the sliding groove 11 and the spring 3. In the present application, the pressure sensor can be selected as a type LFC-90 annular pressure sensor or other hollow pressure sensor.

[0036] Referring to Figure 2 or Figure 3 The locking assembly 6 is provided with at least two groups, which are equidistantly distributed along the side surface of the sliding block 2. In the present application, four groups are provided to ensure that the sliding block 2 is uniformly stressed when the locking assembly 6 is in action, and to ensure the stability of the positioning of the sliding block 2.

[0037] The sliding groove 11 is arranged in a honeycomb array on the base plate 1.

[0038] The vacuum chuck 4 adopts a multi-layer corrugated tube structure, which contains at least two deformable corrugated layers. The corrugated layers of the multi-layer corrugated tube can more closely fit irregular surfaces during vacuumization by increasing the contact area with the surface of the object and the elastic deformation capacity, thereby reducing the risk of gas leakage and enhancing the adsorption stability. The SB-20S / N-G1M / F or PIAB BGI 48 / BGI41 type can be selected.

[0039] Referring toFigure 2 The inner cavity of the sliding block 2 is communicated with the distribution cavity 12 in the base plate 1 through the spring air pipe 7, the distribution cavity 12 is connected with a high-pressure gas source, and the number of the distribution cavity 12 is not less than two groups, the corresponding distribution cavity 12 of the annular groove 61 is configured according to the different positions of the sliding groove 11, and the distribution cavity 12 is arranged to simplify the connection of the gas circuit.

[0040] For the problem of the surface curvature of the stamping part that can be clamped by the adaptive clamp in the scheme, the adaptable curvature radius of the curved stamping part is determined according to the maximum displacement of the sliding block 2, the angle deflection range allowed by the ball joint 5 and the hole distance of the adjacent sliding groove 11 and the like, for example, the maximum displacement of the sliding block is 25 mm, the ball joint allows a deflection of ±20 degrees, and the hole distance of the adjacent sliding groove is 50 mm, so that the adaptable curvature radius range of the curved workpiece is about R≥30 mm.

[0041] When the device is used, the stamping part to be repaired is contacted and extruded by the adaptive clamp through mechanical wall or manual control, the vacuum chuck 4 is contacted with the curved surface of the stamping part, the ball joint 5 is adapted to the angle of the curved surface, and the sliding block 2 is lowered to different degrees according to the different curved surfaces of the workpiece until the pressure measured by the annular pressure sensor in the sliding groove 11 exceeds the threshold value, then the control system controls the high-pressure gas to enter the annular groove 61, the elastic sealing ring 63 is elastically expanded, the locking end 65 of the elastic sealing ring 63 extrudes the inner wall of the sliding groove 11 and positions the sliding block 2, then the ball joint 5 is locked at an angle, the vacuum pump works, the vacuum chuck 4 adsorbs the curved surface of the stamping part, the mechanical arm is reset, the workpiece is fixed, and the repair device body performs defect repair operation.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for repairing surface defects in stamped parts, comprising a control system and a repair device body, characterized in that: It also includes an adaptive clamp, which includes a base plate (1), a slider (2), a vacuum suction cup (4), and a locking assembly (6). A plurality of grooves (11) are provided on the substrate (1), and a slider (2) is slidably arranged in the groove (11). A spring (3) is provided between the slider (2) and the bottom surface of the groove (11). The vacuum suction cup (4) is connected to the top of the slider (2) via a ball joint (5). The ball joint (5) is equipped with a locking function. The vacuum suction cup (4) is connected to an external vacuum pump. The locking component (6) includes an annular groove (61) opened on the side of the slider (2), an elastic sealing ring (63) is provided in the annular groove (61), and a connecting hole (66) is provided on the bottom surface of the annular groove (61). The connecting hole (66) is connected to an external high-pressure gas source through a cavity (21) opened in the slider (2). The high-pressure gas generated by the high-pressure gas source acts on the elastic sealing ring (63) and causes it to expand elastically to lock the slider (2).

2. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: The annular groove (61) has a tapered guide slope (62) on its sidewall, and the angle between the slope and the horizontal plane is 3 to 8 degrees. The cross-section of the elastic sealing ring (63) is stepped.

3. The device for repairing surface defects of stamped parts according to claim 2, characterized in that: The inner side of the elastic sealing ring (63) is recessed to form a sealing end (64), and the outer side forms a locking end (65). The side of the sealing end (64) is provided with an inclined surface that is adapted to the tapered guide slope (62). The sealing end (64) is interference-fitted with the inner wall of the annular groove (61).

4. The device for repairing surface defects of stamped parts according to claim 3, characterized in that: The connecting holes (66) are arranged in a circular array, and their axes are located on the upper and lower symmetrical planes of the annular groove (61).

5. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: An annular pressure sensor is provided between the bottom surface of the slide (11) and the spring (3).

6. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: The locking components (6) are provided in at least two sets and are distributed at equal intervals along the side of the slider (2).

7. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: The grooves (11) are arranged in a honeycomb array on the substrate (1).

8. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: The vacuum suction cup (4) adopts a multi-layer corrugated tube structure, which includes at least two deformable pleated layers.

9. The device for repairing surface defects of stamped parts according to claim 1, characterized in that: The inner cavity of the slider (2) is connected to the distribution cavity (12) opened in the substrate (1) through the spring air tube (7). The distribution cavity (12) is connected to the high-pressure air source, and the number of distribution cavities (12) is not less than two sets.

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