Special hydraulic fixture for composite insulator end fitting processing

Abstract

The application is suitable for the technical field of power hardware processing tooling, and provides a hydraulic clamp special for composite insulator end hardware processing, the clamp is integrally installed on the workbench of a machine tool, and comprises: a tooling support fixedly arranged on the workbench and used for bearing a workpiece to be processed; a hydraulic oil cylinder installed on the workbench and used for providing clamping force; a quick-change clamp cooperatively connected with a piston rod of the hydraulic oil cylinder and used for pressing different specifications of workpieces; and a pneumatic pin positioning device used for automatically extending and inserting into a positioning hole of the workpiece after the workpiece is placed, so as to realize accurate centering and positioning of the workpiece; the application guarantees high rigidity and high precision through hydraulic clamping, realizes quick change of different types of hardware through a quick-change module, does not need to integrally disassemble and assemble the clamp, and realizes quick and accurate clamping in combination with pneumatic positioning.

Description

Technical Field

[0001] This invention relates to the field of tooling technology for power fittings processing, specifically a hydraulic clamp for processing end fittings of composite insulators. Background Technology

[0002] Currently, in the processing of end fittings and ball-and-socket fittings for composite insulators, most clamping is done using common tooling such as chucks and pressure plates. However, existing tooling has the following significant shortcomings: Poor clamping and positioning accuracy makes it difficult to guarantee the coaxiality and position of the workpiece, which can easily lead to out-of-tolerance dimensions in the ball socket machining process. Unstable clamping force can easily lead to workpiece loosening and tool vibration during machining, affecting surface quality and machining accuracy. Manually tightening the clamping plate relies entirely on the operator's experience and physical strength, making quantitative control impossible. Insufficient clamping force can cause workpiece movement and rotation during cutting, resulting in dimensional defects; excessive clamping force can cause plastic deformation of thin-walled hardware, affecting subsequent assembly accuracy. Furthermore, the lack of rigidity in general-purpose tooling makes it prone to vibration during high-cut machining operations such as milling and boring. This not only causes noticeable vibration marks on the workpiece surface, reducing surface roughness, but also accelerates tool wear and chipping, increasing production costs. Poor versatility; different models of hardware require a complete set of tooling to be replaced, resulting in long changeover times, complicated debugging, and low production efficiency. Manual clamping is labor-intensive, and multi-station synchronous processing is difficult to achieve, which cannot meet the needs of batch, high-efficiency and high-precision production.

[0003] Therefore, in view of the above situation, there is an urgent need to provide a special hydraulic clamp for processing the end fittings of composite insulators in order to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a special hydraulic clamp for processing end fittings of composite insulators, which effectively solves the problems of low positioning accuracy, unstable clamping force, cumbersome changeover and poor versatility of traditional tooling, and realizes rapid clamping, precise positioning and efficient processing of fittings of various specifications.

[0005] This invention is implemented as follows: a special hydraulic clamp for machining end fittings of composite insulators, wherein the clamp is integrally mounted on the worktable of a machine tool, and the clamp comprises: A tooling bracket is fixedly mounted on the worktable to support the workpiece to be processed; A hydraulic cylinder, mounted on the worktable, is used to provide clamping force; A quick-change clamp, which mates with the piston rod of the hydraulic cylinder, is used to clamp workpieces of different specifications; and The pneumatic pin positioning device is used to automatically extend and insert into the positioning hole of the workpiece after it is placed, so as to achieve precise centering and positioning of the workpiece.

[0006] As a further aspect of the present invention, the tooling support is a multi-station structure.

[0007] As a further aspect of the present invention, the quick-change fixture is a module that can be quickly disassembled and replaced.

[0008] As a further aspect of the present invention, the pneumatic pin positioning device adopts a pneumatic pin-type positioning structure.

[0009] As a further aspect of the present invention: the machine tool further includes a main base, a secondary base, a multi-axis adjustment assembly, and a machining assembly. The worktable is mounted on the secondary base, and the multi-axis adjustment assembly drives the machining assembly to move and process the clamped workpiece.

[0010] As a further aspect of the present invention: the multi-axis adjustment assembly includes an X-axis drive module for driving the movement of the machining assembly and a Z-axis drive module for driving the movement of the X-axis drive module, wherein the Z-axis drive module is disposed on the main base.

[0011] As a further aspect of the present invention: the machining component includes a main motor mounted on the X-axis drive module and a machine tool spindle driven by the main motor, wherein a tool assembly is mounted on the machine tool spindle.

[0012] As a further aspect of the present invention: the tool assembly includes a tool holder and a tool, the tool being connected to the machine tool spindle via the tool holder.

[0013] As a further aspect of the present invention, it also includes a hydraulic station, which is connected to the hydraulic cylinder pipeline to provide stable hydraulic power to the hydraulic cylinder.

[0014] As a further aspect of the present invention, the machine tool further includes a cooling system for cooling and lubricating the cutting tool and the workpiece during the machining process.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: High rigidity of hydraulic clamping: The clamping force is provided by a hydraulic system, which has higher output force and system rigidity than pneumatic clamping. The clamping force is stable and controllable, and the clamping is firm and reliable. It can effectively resist radial cutting force and axial vibration during the cutting process, and significantly improve the coaxiality accuracy and surface quality of the workpiece.

[0016] High versatility: One set of fixture body can be adapted to various mainstream models of composite insulator end fittings, ball socket fittings and ball head fittings on the market, covering products of different voltage levels. Different specifications of products can be processed simply by interchangeing quick-change fixture modules. There is no need to equip multiple sets of independent tooling, which greatly reduces the manufacturing and maintenance costs of tooling.

[0017] High changeover efficiency: When switching product specifications, there is no need to disassemble the entire fixture. Only the quick-change fixture module needs to be replaced to quickly complete the changeover. The time for a single changeover is significantly shortened compared to traditional tooling, greatly reducing equipment downtime and debugging time, and significantly improving overall production efficiency and equipment utilization.

[0018] Precise positioning: The pneumatic pin positioning device, combined with the reference positioning structure of the tooling bracket, realizes the automatic and precise centering and positioning of the workpiece. It has extremely high repeatability and ensures the consistency of workpiece processing dimensions during mass production. It fully meets the high standard requirements of the power industry for the precision of hardware processing and is suitable for large-scale automated mass production.

[0019] Easy to operate: The entire clamping process only requires the operator to place the workpiece on the designated position of the tooling bracket. The remaining positioning, clamping, pressure holding and loosening actions are all completed automatically by the system. After the processing is completed, it will automatically reset, which greatly reduces the labor intensity of manual clamping, reduces clamping errors and scrap rate caused by human factors, and at the same time reduces the skill level requirements of the operator and improves the stability and reliability of the entire processing procedure. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the main structure of the present invention.

[0023] Figure 3 This is a side view of the structure of the present invention.

[0024] Figure 4 This is a top view of the structure of the present invention.

[0025] Figure 5 This is a structural diagram of the product.

[0026] In the attached diagram: 1-Main base, 2-Z-axis drive module, 3-X-axis drive module, 4-Main motor, 5-Worktable, 6-Hydraulic cylinder, 7-Workpiece, 8-Tool holder, 9-Tool, 10-Tooling bracket, 11-Sub-base, 12-Quick change fixture, 13-Pneumatic pin positioning device. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] Furthermore, in the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The present invention will be further explained below with reference to specific embodiments.

[0033] Please see Figures 1-5 The present invention provides a special hydraulic fixture for machining end fittings of composite insulators. The fixture is integrally mounted on the worktable 5 of a machine tool. The mounting datum of the fixture is highly consistent with the machining datum of the machine tool, ensuring complete unification of the machining coordinate system and the clamping coordinate system. This fundamentally guarantees the stability and repeatability of machining accuracy. The fixture includes: The tooling bracket 10 is fixedly mounted on the workbench 5 to support the workpiece 7 to be processed. The workpiece 7 is a single-ear, double-ear, or ball-and-socket end fitting for composite insulators, which is the dedicated processing object of this fixture. These fittings are usually forged from ductile iron or high-quality carbon structural steel and have high strength and toughness after normalizing treatment. They have high requirements for the rigidity and clamping force of the processing tooling. The workbench 5 is cast from high-strength cast iron and undergoes both artificial and natural aging treatments to eliminate internal stress. It has extremely high rigidity and long-term dimensional stability, which can provide a solid installation foundation for the entire fixture and avoid the decrease in processing accuracy caused by deformation of the workbench 5.

[0034] Hydraulic cylinder 6, installed on the worktable 5, provides a stable and adjustable clamping force to rigidly clamp the workpiece 7, preventing it from loosening or shifting during cutting. The installation position of hydraulic cylinder 6 corresponds one-to-one with the workstation of tooling bracket 10, ensuring that the clamping force acts on the center of force of workpiece 7, avoiding overturning moment that could cause workpiece 7 to tilt or shift. Hydraulic cylinder 6 is a double-acting single-piston rod cylinder, which has the advantages of large output force, smooth operation, and fast response speed. Its output clamping force can be steplessly adjusted through the overflow valve of the hydraulic station, meeting the clamping requirements of different materials and specifications of hardware, ensuring the reliability of clamping, and avoiding plastic deformation of workpiece 7 due to excessive clamping force.

[0035] The quick-change fixture 12 is connected to the piston rod of the hydraulic cylinder 6 and is used to clamp workpieces 7 of different specifications. The clamping surface of the quick-change fixture 12 is designed to conform to the outline of the workpiece 7, which can increase the contact area with the workpiece 7, disperse the clamping force, prevent the surface of the workpiece 7 from being crushed and leaving indentations, and at the same time ensure that the clamping force is evenly distributed on the force-bearing surface of the workpiece 7, thereby improving the stability of clamping. The clamping surface of the quick-change fixture 12 is subjected to high-frequency quenching treatment, which has high hardness and wear resistance, and can be used for a long time without wear and deformation, ensuring the long-term stability of clamping accuracy.

[0036] The pneumatic pin positioning device 13 is used to automatically extend and insert into the positioning hole of the workpiece 7 after the workpiece 7 is placed, so as to achieve precise centering and positioning of the workpiece 7. The positioning hole of the workpiece 7 is a process hole that has been pre-machined in the forging or rough machining process. Its dimensional accuracy and positional accuracy have been strictly tested and can serve as a reliable reference for precise positioning.

[0037] In a more specific example, the tooling bracket 10 is a multi-station structure that can clamp three workpieces at a time, enabling simultaneous positioning, clamping, and processing of multiple workpieces.

[0038] The quick-change clamp 12 is a modular design that can be quickly disassembled and replaced, adapting to different specifications and models of end fittings. When changing models, there is no need to disassemble the entire clamp; only the quick-change module needs to be replaced. The quick-change clamp 12 module can be customized according to specific customer needs, adapting to various non-standard specifications of composite insulator end fittings, further expanding the clamp's applicability.

[0039] The pneumatic pin positioning device 13 adopts a pneumatic pin-type positioning structure, which automatically inserts into the positioning hole of the workpiece 7 during clamping, so as to achieve fast and accurate centering and ensure that the processing datum of each workpiece 7 is uniform.

[0040] In a more specific example, the machine tool also includes a main base 1, a secondary base 11, a multi-axis adjustment assembly, and a machining assembly. The worktable 5 is mounted on the secondary base 11. The main base 1 serves as the foundation of the entire machine tool and adopts a large box-type structure design with internal reinforcing ribs, which has extremely high rigidity and vibration resistance. It can effectively absorb the vibration generated during the machining process and ensure the stability of the machining. The multi-axis adjustment assembly drives the machining assembly to move and machine the clamped workpiece 7.

[0041] The multi-axis adjustment assembly includes an X-axis drive module 3 for driving the movement of the machining assembly and a Z-axis drive module 2 for driving the X-axis drive module 3 to move. The Z-axis drive module 2 is mounted on the main base 1.

[0042] The machining assembly includes a main motor 4 mounted on the X-axis drive module 3 and a machine tool spindle driven by the main motor 4. The machine tool spindle is equipped with a tool assembly. The main motor 4 is directly connected to the machine tool spindle through a flexible coupling, which can efficiently transmit power to the spindle and drive the tool 9 to rotate at high speed for cutting. There is no backlash and little vibration during the transmission process.

[0043] The worktable 5 serves as the overall mounting base for the fixture and is directly fixed to the machine tool, ensuring that it is coaxial and concentric with the X-axis and Z-axis motion systems, providing a rigid mounting reference for overall machining.

[0044] The tool assembly includes a tool holder 8 and a cutting tool 9. The cutting tool 9 is connected to the machine tool spindle via the tool holder 8 and is used for drilling, boring, and face cutting of the workpiece. During the machining process, the machine tool can automatically change different types of cutting tools 9 from the tool magazine according to the pre-programmed machining program, realizing continuous multi-process machining without manual intervention.

[0045] In a more specific example, a hydraulic station is also included, which is connected to the hydraulic cylinder 6 via pipeline to provide stable hydraulic power to the hydraulic cylinder 6; the machine tool also includes a cooling system for cooling and lubricating the cutting tool 9 and the workpiece 7 during the machining process to ensure continuous and stable operation of the equipment.

[0046] In summary, the working steps of this invention are as follows: Place workpiece 7 on fixture support 10; The pneumatic pin positioning device 13 automatically extends to complete precise positioning; Hydraulic cylinder 6 actuates to clamp workpiece 7; The X and Z axes of the machine tool are fed by the cutting tool assembly, which completes the cutting process. After processing is completed, the hydraulic cylinder is released, the pneumatic pin positioning device 13 retracts, and the workpiece is removed. When changing to different models of hardware, only the quick-change clamp 12 needs to be replaced for quick switching, without the need for realignment and adjustment.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic clamp for machining end fittings of composite insulators, wherein the clamp is integrally mounted on the worktable (5) of a machine tool, characterized in that, The clamp includes: Tooling bracket (10) is fixedly installed on the workbench (5) to support the workpiece (7) to be processed. A hydraulic cylinder (6) is mounted on the worktable (5) to provide clamping force; A quick-change clamp (12) is connected to the piston rod of the hydraulic cylinder (6) to clamp workpieces (7) of different specifications; and The pneumatic pin positioning device (13) is used to automatically extend and insert into the positioning hole of the workpiece (7) after the workpiece (7) is placed, so as to achieve precise centering and positioning of the workpiece (7).

2. The hydraulic clamp for machining composite insulator end fittings according to claim 1, characterized in that, The tooling bracket (10) is a multi-station structure.

3. The hydraulic clamp for machining composite insulator end fittings according to claim 1, characterized in that, The quick-change fixture (12) is a module that can be quickly disassembled and replaced.

4. The hydraulic clamp for machining composite insulator end fittings according to claim 1, characterized in that, The pneumatic pin positioning device (13) adopts a pneumatic pin-type positioning structure.

5. The hydraulic clamp for machining composite insulator end fittings according to claim 1 or 3, characterized in that, The machine tool also includes a main base (1), a secondary base (11), a multi-axis adjustment assembly and a processing assembly. The worktable (5) is mounted on the secondary base (11). The multi-axis adjustment assembly drives the processing assembly to move and processes the clamped workpiece (7).

6. The hydraulic clamp for machining composite insulator end fittings according to claim 5, characterized in that, The multi-axis adjustment assembly includes an X-axis drive module (3) for driving the machining assembly to move and a Z-axis drive module (2) for driving the X-axis drive module (3) to move. The Z-axis drive module (2) is mounted on the main base (1).

7. The hydraulic clamp for machining composite insulator end fittings according to claim 5, characterized in that, The machining assembly includes a main motor (4) mounted on the X-axis drive module (3) and a machine tool spindle driven by the main motor (4), wherein a tool assembly is mounted on the machine tool spindle.

8. The hydraulic clamp for machining composite insulator end fittings according to claim 7, characterized in that, The tool assembly includes a tool holder (8) and a tool (9), with the tool (9) connected to the machine tool spindle via the tool holder (8).

9. The hydraulic clamp for machining composite insulator end fittings according to claim 1, characterized in that, It also includes a hydraulic station, which is connected to the pipeline of the hydraulic cylinder (6) to provide stable hydraulic power to the hydraulic cylinder (6).

10. The hydraulic clamp for machining composite insulator end fittings according to claim 8, characterized in that, The machine tool also includes a cooling system for cooling and lubricating the cutting tool (9) and the workpiece (7) during the machining process.

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