Three-jaw for machining thin-walled parts

Abstract

The utility model relates to the field of machining fixture, concretely is a kind of three claws of processing thin-walled parts.The three claws include L type support frame, rotating seat with pneumatic clamping seat and three sliding clamping jaw main bodies.Claw main body is composed of steel claw and top arc clamping jaw, and part can be enclosed and clamped in arc groove through arc concave surface, or placed in steel claw plane to realize traditional clamping.Arc clamping jaw is equipped with circular protruding part at both ends, adjustable screw is installed inside, and different thickness parts are adapted by screwing depth.Claw state, motor drives synchronous wheel to rotate rotating seat and workpiece.Compared with traditional fixture, the structure shortens clamping distance, and the clamping mode of cooperation pre-processing annular groove makes hollow ring class parts can be processed 1-2 finished products when cutting.

Description

Technical Field

[0001] This utility model relates to the field of parts processing technology, and in particular to a three-jaw chuck for processing thin-walled parts. Background Technology

[0002] In the field of machining, the processing of thin-walled parts and easily deformable ring-shaped parts has always been a technical challenge. Due to their structural characteristics, these parts have extremely stringent requirements for clamping methods during the machining process.

[0003] Traditional machining methods using ordinary steel jaws present numerous problems when processing thin-walled parts. On the one hand, if the clamping force is too large, the part is prone to deformation, resulting in failure to meet the roundness and other accuracy requirements specified in the drawings, severely affecting the quality of the part. On the other hand, if the clamping force is too small, the part is prone to displacement or rotation during machining, making machining impossible or even causing the part to be scrapped.

[0004] To address these issues, custom fixtures are typically required for specific parts and processes. Custom fixtures mostly rely on pressure plates to hold the end faces of the parts in place for machining; however, this method has significant limitations. Custom fixtures are often only suitable for specific parts and processes, lacking versatility. Once part specifications or machining requirements change, the existing custom fixtures become unusable, necessitating the redesign and manufacture of new fixtures. This not only increases production costs but also extends the production cycle.

[0005] To address the aforementioned problems, this utility model document proposes a three-jaw chuck for machining thin-walled parts. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the insufficient clamping effect of traditional steel jaws when processing thin-walled parts, the high cost of using customized fixtures, and poor versatility. Therefore, this invention proposes a three-jaw clamping method for processing thin-walled parts.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A three-jaw chuck for machining thin-walled parts includes:

[0009] An L-shaped support frame has a rotating seat that rotatably passes through one side of the L-shaped support frame. A pneumatic clamp is fixedly connected to one end of the rotating seat. Three sliders are slidably arranged on one end of the pneumatic clamp, and a gripper body is fixedly connected to one side of each of the three sliders.

[0010] The gripper body is composed of steel grippers and arc-shaped grippers. The arc-shaped grippers are fixedly connected to the top of the corresponding steel grippers. The arc-shaped concave surfaces of multiple arc-shaped grippers cooperate with each other, and an arc-shaped groove is opened on one side of the arc-shaped concave surface of multiple arc-shaped grippers.

[0011] When a part is placed between three arc-shaped jaws, the arc-shaped concave surfaces cooperate to form an enclosed space to clamp the part, and the part can be inserted into the arc-shaped groove to improve clamping stability.

[0012] In one possible design, the tops of the multiple steel claws are provided with stepped planes, and the arc-shaped gripper is located at the top of the highest plane of the corresponding steel claw.

[0013] In one possible design, both ends of the plurality of said arc-shaped grippers are integrally fixed with circular protrusions.

[0014] In one possible design, three sets of adjustable mechanisms are also included, each set being disposed within a corresponding arc-shaped gripper. Each adjustable mechanism includes two first adjusting screws and two second adjusting screws.

[0015] In one possible design, the two first adjusting screws are located on both sides of the steel claw, and both are located near the middle of the arc-shaped jaw. The two second adjusting screws are located at both ends of the steel claw. Both the first adjusting screws and the second adjusting screws are threaded through one side of the arc-shaped jaw, and one end of both the first adjusting screws and the second adjusting screws extends into the arc-shaped groove.

[0016] In one possible design, a drive component is also included, which is disposed on one side of the L-shaped support frame and is used to drive the rotating seat to rotate.

[0017] In one possible design, the drive component is fixedly connected to a servo motor on the inner wall of the bottom of the L-shaped support frame. One end of the output shaft of the servo motor is fixedly connected to a first synchronous pulley, and the other end of the rotating seat is fixedly connected to a second synchronous pulley. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt drive.

[0018] In one possible design, the groove width of the arc-shaped groove is 1-3 mm.

[0019] In one possible design, when the first adjusting screw and the second adjusting screw are rotated, one end of the screw extends into the arc-shaped groove and abuts against the surface of the part to accommodate parts of different thicknesses.

[0020] In this application, when a user needs to process thin-walled parts with a large diameter, the part can be placed between three arc-shaped jaws. The arc-shaped concave surfaces of the jaws cooperate to form an enclosed space to clamp the part. At the same time, the part can be further inserted into the arc-shaped groove, which can further improve the stable clamping of thin-walled parts.

[0021] Because different parts have different diameters, most parts will have more contact with the ends of the curved jaws. When a part is inserted into the curved groove, the rounded protrusions at both ends of the jaws increase the contact area between the inner wall of the groove and the part, ensuring stable placement. Furthermore, after installation, depending on the part's thickness, the user can rotate the first or second adjusting screw on the curved jaws to extend one end of the screw into the groove and abut against the part's surface, further securing the part and preventing instability caused by differences in part thickness.

[0022] When the same clamping work as traditional grippers is required, the part can be placed on the stepped plane of the steel gripper, and the steel gripper can be used to achieve stable clamping, which can meet the processing needs of different scenarios.

[0023] During the processing, the pneumatic clamp can drive multiple gripper bodies to adjust, ensuring stable clamping of the parts; at the same time, if it is necessary to adjust the angle of the parts, the servo motor is started, and the output shaft of the servo motor can drive the first synchronous pulley to rotate. The first synchronous pulley drives the second synchronous pulley to rotate through the synchronous belt, thereby causing the rotating seat to rotate. The parts can be rotated and adjusted while being clamped, so as to complete processing operations at different angles.

[0024] For machining hollow ring-shaped parts, users can first pre-cut an annular groove at one end of the hollow cylindrical material to be cut. Then, the hollow cylindrical material is installed in the three gripper bodies. The arc-shaped grippers, in conjunction with the annular groove, can stably hold the hollow cylindrical material. Furthermore, because the gripping distance of this three-jaw system is shorter than that of a traditional three-jaw system, when cutting hollow rings, using this three-jaw system can produce one or two more finished products than using a traditional three-jaw system, thus improving material utilization.

[0025] Beneficial effects: In this utility model, the three-jaw gripper for processing thin-walled parts is designed for thin-walled parts with larger diameters. By setting arc-shaped grippers, the arc-shaped concave surfaces of the grippers cooperate to form an enclosing space, which can effectively clamp the parts. At the same time, the parts can be further inserted into the arc-shaped groove, which further improves the stability of clamping. Moreover, the circular protrusions at both ends of the arc-shaped grippers increase the contact area between the inner wall of the arc-shaped groove and the parts, ensuring that parts of different diameters can be stably placed, avoiding the problem of unstable clamping caused by differences in the diameter of the parts.

[0026] In this utility model, the three-jaw chuck for processing thin-walled parts is equipped with an adjustable mechanism, including a first adjusting screw and a second adjusting screw. The user can rotate the corresponding screw according to the thickness of the part, so that one end of the screw extends into the arc groove and abuts against the surface of the part, thereby further fixing the part and avoiding the situation of unstable clamping due to the difference in part thickness, thus expanding the application range of the three-jaw chuck.

[0027] In this utility model, the three-jaw chuck for processing thin-walled parts can place the part on the stepped plane of the steel jaws when the same clamping work as traditional jaws is required, and use the steel jaws to achieve stable clamping without changing the fixture, thus improving processing efficiency.

[0028] In this utility model, the three-jaw chuck for processing thin-walled parts has a shorter clamping distance compared to the traditional three-jaw chuck. Combined with the clamping method of pre-processed annular grooves, it can process 1-2 more finished products when cutting hollow ring-shaped parts, which can significantly reduce material loss.

[0029] In this invention, the three-jaw chuck forms an enclosing clamping structure through the cooperation of the arc-shaped jaws and the arc-shaped groove, which enhances the clamping stability of thin-walled parts; the adjustable screw allows the arc-shaped groove to adapt to parts of different thicknesses, preventing loosening of the clamping; the stepped plane of the steel jaws is compatible with traditional clamping methods, eliminating the need to change the clamps; the shorter clamping distance, combined with the pre-processed groove clamping, allows for the production of 1-2 more finished products during hollow ring cutting, reducing material waste. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of a three-jaw chuck for processing thin-walled parts, as proposed in this utility model.

[0031] Figure 2 This is a schematic diagram of the disassembled structure of a three-jaw chuck for processing thin-walled parts according to the present invention;

[0032] Figure 3 This is a schematic diagram of the main body mounting structure of a three-jaw gripper for processing thin-walled parts according to the present invention.

[0033] Figure 4 This is a schematic diagram of the three-dimensional structure of the gripper body of a three-jaw chuck for processing thin-walled parts according to the present invention.

[0034] Figure 5 This is a cross-sectional view of the main body of a three-jaw gripper for processing thin-walled parts according to the present invention.

[0035] Figure 6 This is a schematic diagram of a three-jaw clamp for holding hollow cylindrical materials in order to process thin-walled parts, as proposed in this utility model.

[0036] In the diagram: 1. L-shaped support frame; 2. Rotating seat; 3. Pneumatic clamping seat; 4. Gripper body; 5. Servo motor; 6. First synchronous pulley; 7. Second synchronous pulley; 8. Slider; 9. Steel claw; 10. Arc-shaped gripper; 11. Arc-shaped groove; 12. First adjusting screw; 13. Circular protrusion; 14. Second adjusting screw; 15. Hollow cylinder material; 16. Annular groove. Detailed Implementation

[0037] 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.

[0038] In one embodiment: Refer to Figure 1-6 A three-jaw gripper comprises: an L-shaped support frame 1, a rotating seat 2, a pneumatic clamping seat 3, a gripper body 4, an adjustable mechanism, and a driving component.

[0039] In this embodiment, the L-shaped support frame 1 serves as the support structure for the entire device, with a rotating seat 2 rotatably passing through one side. A pneumatic clamp 3 is fixedly mounted on one end of the rotating seat 2, and three sliders 8 are slidably mounted on one end of the pneumatic clamp 3. All three sliders 8 are driven by the pneumatic structure of the pneumatic clamp 3. The pneumatic clamp 3 is a mature product in the prior art and will not be described in detail here. A gripper body 4 is fixedly mounted on one side of each slider 8, and the three gripper bodies 4 are used to clamp thin-walled parts.

[0040] In this embodiment, the gripper body 4 consists of a steel gripper 9 and an arc-shaped gripper 10. The top of the steel gripper 9 has a stepped plane. The design of the stepped plane allows the steel gripper 9 to perform the same gripping work as traditional grippers, eliminating the need to change the gripper when necessary.

[0041] In this embodiment, the arc-shaped gripper 10 is fixedly installed on the top of the highest plane of the steel gripper 9. The arc-shaped concave surfaces of multiple arc-shaped grippers 10 cooperate with each other, and an arc-shaped groove 11 is formed on one side of each arc-shaped concave surface. The groove width of the arc-shaped groove 11 is 2mm. The arc-shaped gripper 10 is used to stably clamp thin-walled parts with large diameters.

[0042] In this embodiment, each of the multiple arc-shaped grippers 10 has a circular protrusion 13 integrally fixed at both ends. The circular protrusion 13 can increase the contact area between the two ends of the corresponding arc-shaped groove 11 and the thin-walled parts to be clamped, ensuring that the multiple gripper bodies 4 can provide stable clamping when facing thin-walled parts of various diameters.

[0043] In this embodiment, there are three sets of adjustable mechanisms, each set within a corresponding arc-shaped gripper 10, used to adapt the arc-shaped gripper 10 to thin-walled parts of various thicknesses. Each set of adjustable mechanisms includes two first adjusting screws 12 and two second adjusting screws 14. The two first adjusting screws 12 are located on both sides of the steel gripper 9 and near the center of the arc-shaped gripper 10, while the two second adjusting screws 14 are located at both ends of the steel gripper 9 and engage with corresponding circular protrusions 13. Both the first adjusting screws 12 and the second adjusting screws 14 are threaded through one side of the arc-shaped gripper 10, and one end of each extends into the arc-shaped groove 11 and abuts against the inner wall of the arc-shaped groove 11. By adjusting these screws, the thin-walled parts inserted into the arc-shaped groove 11 can be further abutted and fixed, while ensuring that thin-walled parts of different thicknesses can be stably clamped within the arc-shaped groove 11.

[0044] This application can be used in the field of parts processing technology, or in other fields applicable to this application.

[0045] In another embodiment: Reference Figure 1 , 2 A three-jaw chuck for machining thin-walled parts, which is applied to the field of parts processing technology;

[0046] In this embodiment, the driving component is located on one side of the L-shaped support frame 1 and is used to drive the rotating seat 2 to rotate. Specifically, the driving component is a servo motor 5 fixedly installed on the inner wall of the bottom of the L-shaped support frame 1. A first synchronous pulley 6 is fixedly installed at one end of the output shaft of the servo motor 5, and a second synchronous pulley 7 is fixedly installed at the other end of the rotating seat 2. The first synchronous pulley 6 and the second synchronous pulley 7 are connected by a synchronous belt. When the servo motor 5 is running, its output shaft drives the first synchronous pulley 6 to rotate, and the first synchronous pulley 6 drives the second synchronous pulley 7 to rotate through the synchronous belt, thereby driving the rotating seat 2 to rotate, realizing the rotational adjustment of the clamped part.

[0047] The working principle, control method, and specific wiring method of the servo motor 5 are conventional techniques in this field. Those skilled in the art can perform conventional configurations based on specific application scenarios and existing known technologies, and will not be elaborated further here.

[0048] The working principle and usage process of this technical solution are as follows: When the user needs to process thin-walled parts with a large diameter, the part can be placed between the three arc-shaped jaws 10. The arc-shaped concave surfaces of the arc-shaped jaws 10 cooperate to form an enclosed space to clamp the part. At the same time, the part can be further inserted into the arc-shaped groove 11, which can further improve the stable clamping of thin-walled parts.

[0049] Because different parts have different diameters, most parts will have more contact with the two ends of the arc-shaped gripper 10. When a part is inserted into the arc-shaped groove 11, the circular protrusions 13 at both ends of the arc-shaped gripper 10 increase the contact area between the inner wall of the arc-shaped groove 11 and the part, ensuring stable placement of the part. Simultaneously, after installation, depending on the part's thickness, the user can rotate the first adjusting screw 12 or the second adjusting screw 14 on the arc-shaped gripper 10 as needed, extending one end of the corresponding screw into the arc-shaped groove 11 and abutting against the part's surface. This further secures the part and prevents instability caused by differences in part thickness.

[0050] When the same clamping work as traditional grippers is required, the part can be placed on the stepped plane of the steel jaw 9, and the steel jaw 9 can be used to achieve stable clamping, which can easily meet the processing needs in different scenarios.

[0051] During the processing, the pneumatic clamp 3 can drive multiple gripper bodies 4 to adjust, ensuring stable clamping of the parts; at the same time, if it is necessary to adjust the angle of the parts, the servo motor 5 is started, and the output shaft of the servo motor 5 can drive the first synchronous wheel 6 to rotate. The first synchronous wheel 6 drives the second synchronous wheel 7 to rotate through the synchronous belt, thereby causing the rotating seat 2 to rotate. The parts can be rotated and adjusted in the clamping state in order to complete processing operations at different angles.

[0052] For machining hollow ring-shaped parts, the user can first pre-carve an annular groove 16 at one end of the hollow cylindrical material 15 to be cut. Then, the hollow cylindrical material 15 is installed in the three jaw bodies 4. By utilizing the cooperation between the arc-shaped jaws 10 and the annular groove 16, the hollow cylindrical material 15 can be stably clamped. At the same time, since the distance between the three jaws holding the parts is shorter than that of the traditional three-jaw method, when cutting hollow rings, using this three-jaw clamping method can produce one or two more finished products than using the traditional three-jaw method, thereby improving material utilization.

[0053] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A three-jaw chuck for machining thin-walled parts, characterized in that, include: L-shaped support frame (1), with a rotating seat (2) rotatably passing through one side of the L-shaped support frame (1), and a pneumatic clamp (3) fixedly connected to one end of the rotating seat (2), and three sliders (8) slidably arranged on one end of the pneumatic clamp (3), with a gripper body (4) fixedly connected to one side of each of the three sliders (8). The gripper body (4) is composed of steel grippers (9) and arc-shaped grippers (10). The arc-shaped grippers (10) are fixedly connected to the top of the corresponding steel grippers (9). The arc-shaped concave surfaces of the multiple arc-shaped grippers (10) cooperate with each other, and an arc-shaped groove (11) is provided on one side of the arc-shaped concave surface of the multiple arc-shaped grippers (10). When the part is placed between the three arc-shaped jaws (10), the arc-shaped concave surfaces cooperate to form an enclosed space to clamp the part, and the part can be inserted into the arc-shaped groove (11) to improve clamping stability.

2. The three-clawed weapon according to claim 1, characterized in that, The top of each of the steel claws (9) is provided with a stepped plane, and the arc-shaped gripper (10) is located at the top of the highest plane of the corresponding steel claw (9).

3. The three-clawed weapon according to claim 1, characterized in that, Both ends of the plurality of arc-shaped grippers (10) are integrally fixed with circular protrusions (13).

4. The three-clawed weapon according to claim 1, characterized in that, It also includes three sets of adjustable mechanisms, which are respectively set in the corresponding arc-shaped grippers (10). The adjustable mechanisms include two first adjusting screws (12) and two second adjusting screws (14).

5. The three-clawed weapon according to claim 4, characterized in that, The two first adjusting screws (12) are located on both sides of the steel claw (9) and are located near the middle of the arc-shaped clamp (10). The two second adjusting screws (14) are located at both ends of the steel claw (9). The two first adjusting screws (12) and the two adjusting screws (14) are threaded through one side of the arc-shaped clamp (10), and one end of the two first adjusting screws (12) and the two adjusting screws (14) extends into the arc-shaped groove (11).

6. The three-clawed weapon according to claim 1, characterized in that, It also includes a drive component, which is disposed on one side of the L-shaped support frame (1) and is used to drive the rotating seat (2) to rotate.

7. The three-clawed weapon according to claim 6, characterized in that, The driving component is fixedly connected to the servo motor (5) on the bottom inner wall of the L-shaped support frame (1). One end of the output shaft of the servo motor (5) is fixedly connected to the first synchronous pulley (6), and the other end of the rotating seat (2) is fixedly connected to the second synchronous pulley (7). The first synchronous pulley (6) and the second synchronous pulley (7) are connected by a synchronous belt drive.

8. The three-clawed weapon according to claim 1, characterized in that, The groove width of the arc-shaped groove (11) is 1-3mm.

9. The three-clawed weapon according to claim 5, characterized in that, When the first adjusting screw (12) and the second adjusting screw (14) are rotated, one end of the screw extends into the arc groove (11) and abuts against the surface of the part to accommodate parts of different thicknesses.

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