An automated fixture for processing plastic parts

Abstract

This utility model relates to the field of plastic parts processing technology and provides an automated fixture for plastic parts processing, including a base, a movable module welded to the top of the base, a connecting box connected to the bottom of the movable module, a motor connected inside the connecting box, and a clamping assembly connected to the output end of the motor. In this utility model, a bidirectional hydraulic telescopic rod can drive the connecting rods on both sides to move closer or further away synchronously. The rotating component is connected to a torque spring through a rotating shaft and can rotate flexibly within a range of 30-150°, causing the clamping plate to adaptively conform to the shape contour of irregular plastic parts. With the clamping plate made of memory foam, its softness can further fill the gaps on the surface of the plastic parts, increasing the contact area while avoiding local stress concentration. This solves the problem that traditional rigid fixtures cannot stably clamp irregular plastic parts, enabling the fixture to adapt to the processing of various complex-shaped plastic parts, compared to the limitation of traditional special fixtures that can only adapt to a single model.

Description

Technical Field

[0001] This utility model belongs to the field of plastic parts processing technology, and in particular relates to an automated fixture for processing plastic parts. Background Technology

[0002] Plastic parts are widely used and are usually manufactured using processing technologies such as injection molding, extrusion, and blow molding. During the processing, plastic parts need to be precisely fixed and positioned to ensure the accuracy and quality of subsequent processing. For example, processes such as deburring, chamfering, and precision cutting of slots and holes all require plastic parts to maintain a stable position.

[0003] Existing fixtures are mostly specialized fixtures designed for specific specifications and models of plastic parts. Their clamping dimensions and positioning structures are fixed, and they can only match a single or very small range of plastic parts of different sizes and shapes. Whenever switching to process different models of plastic parts, the original fixture must be disassembled and a new specialized fixture must be installed and adjusted. This process is not only time-consuming and labor-intensive, leading to production interruptions and reduced equipment utilization, but also requires a large number of specialized fixtures to be stocked for different models of plastic parts, significantly increasing equipment procurement costs and warehousing management costs. Therefore, an automated fixture for processing plastic parts is needed to solve the above problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide an automated fixture for processing plastic parts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automated fixture for processing plastic parts includes a base, a movable module welded to the top of the base, a connecting box connected to the bottom of the movable module, a motor connected inside the connecting box, and a clamping assembly connected to the output end of the motor. The clamping assembly includes a connecting plate, through which a bidirectional hydraulic telescopic rod is connected. Both ends of the bidirectional hydraulic telescopic rod are connected to connecting rods. An electric telescopic rod is connected to the bottom of each connecting rod. One end of the electric telescopic rod is connected to a limit box. One end of the limit box is connected to a torque spring. A rotating shaft is connected to the inner side of the torque spring. One end of the rotating shaft is connected to a rotating component. A clamping plate is connected to the top of the rotating component. A vacuum generator is connected to the bottom of the connecting plate. A vacuum suction cup is connected to the bottom of the vacuum generator.

[0006] In a further technical solution, there are two connecting rods, and the bottom of each connecting rod is connected to an electric telescopic rod. An electric actuator controller is connected to one side of the base, and the electric actuator controller is connected to the two electric telescopic rods via wires.

[0007] In a further technical solution, the clamp is made of memory foam, the bottom of the clamp has an anti-slip groove, and the rotation angle of the rotating component is 30-150°.

[0008] In a further technical solution, a photoelectric sensor is snapped into the middle of the vacuum suction cup, and the photoelectric sensor is located above the base.

[0009] In a further technical solution, a first limiting telescopic rod is connected through the inside of the connecting plate. The first limiting telescopic rod is a bidirectional telescopic rod, and its two ends are respectively connected to two connecting rods. A second limiting telescopic rod is connected between the connecting rods and the limiting box.

[0010] In a further technical solution, the mobile module includes a support frame, and there are two support frames. An X-axis slide rail is provided on the inner side of the two support frames. A Y-axis slide rail is connected between the two X-axis slide rails. A first dovetail slider is slidably connected to the outer side of the Y-axis slide rail. A second dovetail slider is slidably connected to the outer side of the X-axis slide rail. The two ends of the second dovetail slider are welded to the Y-axis slide rail.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a bidirectional hydraulic telescopic rod that drives the connecting rods on both sides to move closer or further away synchronously, adapting to plastic parts of different widths. The electric telescopic rod can adjust the height of the limit box and clamping plate to match plastic parts of different thicknesses or heights. The rotating part is connected to the torque spring via a rotating shaft and can rotate flexibly within a range of 30-150°, causing the clamping plate to adaptively conform to the shape of irregular plastic parts. Combined with the clamping plate made of memory foam, its softness can further fill the gaps on the surface of the plastic parts, increasing the contact area while avoiding local stress concentration. This solves the problem that traditional rigid clamps cannot stably clamp irregular plastic parts, enabling the clamp to adapt to the processing of various complex-shaped plastic parts. Compared to the limitation of traditional special clamps that can only adapt to a single model, this clamp can cover the processing needs of plastic parts of various sizes and specifications without disassembly or replacement. This invention employs a dual-fixing method combining mechanical clamping and vacuum adsorption. The clamping plate provides stable clamping force through a bidirectional hydraulic telescopic rod, limiting the plastic part from both sides. The vacuum generator drives the vacuum suction cup to generate negative pressure, achieving adsorption and fixation from the top of the plastic part, forming a three-dimensional fixing structure with lateral clamping and longitudinal adsorption. Compared with traditional single mechanical clamping, this structure can effectively prevent the plastic part from slipping or flipping during grinding, precision cutting, and other processing, ensuring stable processing benchmarks, reducing the incidence of quality problems such as slot size deviation and uneven chamfering, and improving product qualification rate.

[0012] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model; Figure 2 This is a three-dimensional structural diagram of the main body of this utility model viewed from below; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the main body of this utility model; Figure 4 This is the main body of the utility model. Figure 2 A magnified three-dimensional structural diagram of A in the middle; Figure 5 This is the main body of the utility model. Figure 3 A magnified three-dimensional structural diagram of B.

[0014] In the diagram: 1. Base; 2. Moving module; 3. Connecting box; 4. Motor; 5. Clamping assembly; 6. First limiting telescopic rod; 7. Photoelectric sensor; 8. Second limiting telescopic rod; 9. Electric push rod controller; 201. Support frame; 202. X-axis slide rail; 203. Y-axis slide rail; 204. First dovetail slider; 205. Second dovetail slider; 501. Connecting plate; 502. Bidirectional hydraulic telescopic rod; 503. Connecting rod; 504. Electric telescopic rod; 505. Limiting box; 506. Torque spring; 507. Rotating shaft; 508. Rotating component; 509. Clamping plate; 510. Vacuum generator; 511. Vacuum suction cup. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] like Figures 1-5 As shown, this utility model embodiment provides an automated fixture for processing plastic parts, including a base 1, a movable module 2 welded to the top of the base 1, a connecting box 3 connected to the bottom of the movable module 2, a motor 4 connected inside the connecting box 3, and a clamping assembly 5 connected to the output end of the motor 4. The clamping assembly 5 includes a connecting plate 501, through which a bidirectional hydraulic telescopic rod 502 is connected. Both ends of the bidirectional hydraulic telescopic rod 502 are connected to connecting rods 503. The bottom of the connecting rods 503 is connected to an electric telescopic rod 504. One end of the electric telescopic rod 504 is connected to a limit box 505. One end of the limit box 505 is connected to a torque spring 506. The inner side of the torque spring 506 is connected to a rotating shaft 507. One end of the rotating shaft 507 is connected to a rotating component 508. The top of the rotating component 508 is connected to a clamping plate 509. The bottom of the connecting plate 501 is connected to a vacuum generator 510. The bottom of the vacuum generator 510 is connected to a vacuum suction cup 511.

[0018] In this embodiment, the bidirectional hydraulic telescopic rod 502 can drive the connecting rods 503 on both sides to move synchronously closer to or away from the plastic part. The height of the limiting box 505 and the clamping plate 509 can be adjusted by the electric telescopic rod 504 to match plastic parts of different thicknesses or heights, thereby clamping the plastic parts. When the bidirectional hydraulic telescopic rod 502 drives the clamping plate 509 to move closer to the plastic part, if the plastic part is irregularly shaped, the clamping plate 509 will first contact the protruding part of the plastic part. At this time, the rotating part 508 will be rotated around the rotating shaft 507 by external force, and at the same time, the torque spring 506 will be twisted and stored. As the clamping plate 509 continues to move, the torque spring 506 will be twisted and stored. The spring force of the moment spring 506 keeps the clamping plate 509 in contact with the surface of the plastic part until the clamping force reaches the preset value, thus completing the clamping of the plastic part. At the same time, the vacuum generator 510 is connected to the vacuum suction cup 511 through an air pipe. Its working principle is based on the Venturi effect. Compressed air enters from the air inlet of the generator and is ejected at high speed through the narrow nozzle, forming a negative pressure zone at the nozzle outlet. This draws out the air from the vacuum suction cup 511, reducing the air pressure inside the suction cup to 0.02-0.05 MPa. At this time, the atmospheric pressure exerts an upward pressure on the surface of the plastic part, pressing the plastic part tightly under the suction cup, thus forming a longitudinal fixation.

[0019] like Figure 2 , Figure 3 and Figure 4 As shown, specifically, there are two connecting rods 503, and the bottom of each connecting rod 503 is connected to an electric telescopic rod 504. An electric push rod controller 9 is connected to one side of the base 1, and the electric push rod controller 9 is connected to the two electric telescopic rods 504 through wires. The clamp 509 is made of memory foam, and the bottom of the clamp 509 has anti-slip grooves. The rotation angle of the rotating part 508 is 30-150°. A photoelectric sensor 7 is snapped into the middle of the vacuum suction cup 511, and the photoelectric sensor 7 is located above the base 1; The first limiting telescopic rod 6 is connected through the inside of the connecting plate 501. The first limiting telescopic rod 6 is a bidirectional telescopic rod. The two ends of the first limiting telescopic rod 6 are respectively connected to two connecting rods 503. A second limiting telescopic rod 8 is connected between the connecting rod 503 and the limiting box 505. The mobile module 2 includes a support frame 201, and there are two support frames 201. An X-axis slide rail 202 is provided on the inner side of the two support frames 201. A Y-axis slide rail 203 is connected between the two X-axis slide rails 202. A first dovetail slider 204 is slidably connected to the outer side of the Y-axis slide rail 203. A second dovetail slider 205 is slidably connected to the outer side of the X-axis slide rail 202. The two ends of the second dovetail slider 205 are welded to the Y-axis slide rail 203.

[0020] In this embodiment, the photoelectric sensor 7 emits red light, which is reflected after hitting the surface of the plastic part. The reflected light is received by the receiver. If the plastic part is placed in the center and completely covers the suction cup, the intensity of the reflected light is stable, and the sensor outputs a normal positioning signal. If the plastic part is offset, the intensity of the reflected light on the left side is weakened and that on the right side is strengthened, and the sensor outputs a positioning deviation signal. After receiving the sensor signal, the control system automatically triggers the fine-tuning program of the moving module. If the X-axis direction is offset, the second dovetail slider 205 is driven to move along the X-axis slide rail 202 to correct it. If the Y-axis direction is offset, the first dovetail slider 204 is driven to move along the Y-axis slide rail 203 to correct it until the sensor detects that the positioning is normal, forming a closed-loop control to ensure the positioning accuracy of the plastic part. The electric actuator controller 9 outputs synchronous control signals to the two electric telescopic rods 504 to ensure that the height adjustment of the limit box 505 and the clamping plate 509 is consistent, avoiding the tilting of the plastic part due to the height difference on both sides. The electric actuator controller 9 is a KZ-05 electric actuator controller.

[0021] The working principle of this utility model is as follows: First, the photoelectric sensor 7 emits red light, which is reflected after shining on the surface of the plastic part. The reflected light is received by the receiver. If the plastic part shifts, the control system receives the sensor signal and automatically triggers the fine-tuning program of the moving module. If the shift is in the X-axis direction, the second dovetail slider 205 is driven to move along the X-axis slide rail 202 to correct it. If the shift is in the Y-axis direction, the first dovetail slider 204 is driven to move along the Y-axis slide rail 203 to correct it. Then, the bidirectional hydraulic telescopic rod 502 can drive the connecting rods 503 on both sides to move closer to or further away from the plastic part synchronously. The limit box 505 and the electric telescopic rod 504 can be adjusted. The height of the clamping plate 509 is matched to plastic parts of different thicknesses or heights to clamp the plastic parts. Finally, when the bidirectional hydraulic telescopic rod 502 drives the clamping plate 509 to approach the plastic part, if the plastic part is irregularly shaped, the clamping plate 509 first contacts the protruding part of the plastic part. At this time, the rotating part 508 is rotated around the rotating shaft 507 under external force, and the torque spring 506 is twisted and stored. As the clamping plate 509 continues to move, the elastic force of the torque spring 506 keeps the clamping plate 509 in contact with the surface of the plastic part until the clamping force reaches the preset value, thus completing the clamping of the plastic part. At the same time, the vacuum suction cup 511 further fixes the plastic part.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

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