A spherical special machine clamp with self-lubricating wear-resistant bushing

Abstract

The utility model provides a kind of spherical special machine clamp with self-lubricating wear-resistant bushing belongs to mechanical processing fixture technical field, the spherical special machine clamp with self-lubricating wear-resistant bushing includes modularized expansion sleeve assembly and self-lubricating friction pair, the modularized expansion sleeve assembly includes 3 inch shaft, 3 inch expansion sleeve, 3 inch pull rod and 3 inch ball, for realizing quick disassembly and assembly by axial pre-tightening spring;The inner hole of the 3 inch expansion sleeve is conical surface cooperation with the 3 inch ball, the replacement of the 3 inch expansion sleeve is facilitated;Self-lubricating friction pair adopts graphite copper sleeve, it is arranged between the 3 inch pull rod and clamp, for realizing oil-free lubrication;The utility model provides a kind of spherical special machine clamp with self-lubricating wear-resistant bushing, can solve the problem that traditional spherical clamp is more used fixed expansion sleeve structure, replacement specification needs integral disassembly and assembly clamp, time-consuming and labor-consuming;Friction part is easily worn due to lack of self-lubricating design, leading to frequent maintenance of fixture precision decline.

Description

Technical Field

[0001] This utility model belongs to the field of machining fixture technology, specifically, it relates to a spherical special machine fixture with a self-lubricating wear-resistant bushing. Background Technology

[0002] Fixtures, as indispensable tools in the manufacturing process, serve to position and hold workpieces. Under the requirements of high-precision and high-efficiency machining, spherical special-purpose machine fixtures have gradually become an important type of fixture, especially in applications of automation and CNC machine tools, where they have a very wide range of uses. Traditional fixtures mostly adopt fixed or simple adjustable designs, which often have the following problems in the machining of complex parts: Traditional fixtures are prone to errors during positioning, affecting machining accuracy. When machining different workpieces, traditional fixtures require frequent adjustments, reducing production efficiency. Traditional fixtures cannot meet the changing clamping requirements when faced with workpieces of different shapes and sizes.

[0003] Spherical special-purpose machine tool fixtures are specialized fixtures designed based on the principle of spherical surfaces. Through spherical support, rapid positioning, and clamping, they effectively improve machining accuracy and production efficiency. Utilizing the contact surface between the spherical surface and the workpiece, the fixture automatically finds the ideal clamping position through self-positioning, improving its applicability and accuracy. Spherical special-purpose machine tool fixtures ensure stable clamping of the workpiece during machining, reducing errors. Compared to traditional fixtures, spherical special-purpose machine tool fixtures can be adapted to the machining of different workpieces through simple adjustments and parts replacement, saving time.

[0004] Traditional spherical clamps mostly adopt a fixed expansion sleeve structure. Changing specifications requires disassembling and assembling the entire clamp, which is time-consuming and labor-intensive. The sliding friction parts are prone to wear due to the lack of self-lubricating design, resulting in a decrease in clamp accuracy and frequent maintenance. Utility Model Content

[0005] In view of this, the present invention provides a spherical special machine fixture with a self-lubricating wear-resistant bushing, which can solve the problems of traditional spherical fixtures mostly adopting a fixed expansion sleeve structure, requiring the entire fixture to be disassembled and reassembled when changing specifications, which is time-consuming and labor-intensive; and the sliding friction parts being prone to wear due to the lack of self-lubricating design, resulting in decreased fixture accuracy and frequent maintenance.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a spherical special machine fixture with a self-lubricating wear-resistant bushing, comprising a modular expansion sleeve assembly and a self-lubricating friction pair. The modular expansion sleeve assembly includes a 3-inch shaft, a 3-inch expansion sleeve, a 3-inch tie rod, and a 3-inch ball, which is used to achieve quick assembly and disassembly via an axial preload spring. The inner hole of the 3-inch expansion sleeve and the 3-inch ball are fitted with a tapered surface to facilitate the replacement of the 3-inch expansion sleeve. The self-lubricating friction pair uses a graphite copper sleeve and is located between the 3-inch tie rod and the fixture to achieve lubrication without oiling.

[0008] The technical advantages of this utility model for a spherical special-purpose machine clamp with a self-lubricating wear-resistant bushing are as follows: the 3-inch shaft, 3-inch expansion sleeve, 3-inch tie rod, and 3-inch ball are quickly assembled and disassembled via an axial preload spring. This design allows for rapid installation and disassembly of the clamp without the need for complex tools or operations, improving production efficiency and maintenance convenience. The preload force of the spring keeps the components firmly in place, ensuring the clamp is stable and reliable during operation.

[0009] The conical fit between the inner hole of the 3-inch expansion sleeve and the 3-inch ball ensures a tighter and more stable connection, preventing loosening or detachment. This conical structure also makes changing the 3-inch expansion sleeve easier, reducing operational complexity and time.

[0010] Graphite copper bushings possess excellent self-lubricating properties, eliminating the need for external grease lubrication and reducing maintenance frequency and costs. Furthermore, their good wear resistance and high-temperature resistance minimize the risk of wear and overheating during friction, extending their service life.

[0011] By using a graphite copper sleeve, friction can be effectively reduced, wear on the fixture during use can be decreased, and the fixture can operate stably for a long time.

[0012] Based on the above technical solution, the spherical special machine fixture with self-lubricating wear-resistant bushing of this utility model can be further improved as follows:

[0013] The graphite copper sleeve adopts an axial split design and is positioned by a slot. When replacing it, it can be removed simply by removing the end cap.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the split design of the graphite copper sleeve, which uses a slot for positioning, allows for quick removal simply by removing the end cap during replacement. This design simplifies and streamlines the maintenance and replacement process, reduces downtime, and improves production line efficiency.

[0015] Furthermore, the 3-inch expansion sleeve has a split structure.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are: the split structure makes the installation and disassembly of the expansion sleeve more flexible, more adaptable, and easier to maintain and replace.

[0017] Furthermore, the graphite copper sleeve is configured as a three-section splicing structure.

[0018] The advantages of adopting the above-mentioned improvement scheme are as follows: the three-section splicing structure makes the maintenance and replacement of the graphite copper bushing more convenient, allowing for the replacement of individual sections based on actual wear, rather than replacing the entire bushing. This reduces replacement costs and extends the service life of the bushing.

[0019] Furthermore, the graphite copper sleeve can be replaced with a steel sleeve containing a MoS2 coating.

[0020] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the MoS2 (molybdenum disulfide) coating has excellent lubricity, which can further improve the wear resistance and self-lubricating properties of the friction pair. Using steel bushings with a MoS2 coating can provide better high-temperature resistance and longer service life, adapting to harsher working environments.

[0021] Furthermore, the surface edges of the spherical special machine fixture are all set to obtuse angles.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the purpose of setting the obtuse angle is to reduce sharp edges during operation, thereby reducing the risk of collision and wear between the fixture and other parts or operators. The obtuse angle can also effectively prevent instability and unsafe factors during the use of the fixture.

[0023] Furthermore, the graphite copper sleeve is made of graphite with a content of ≥15%.

[0024] Of which, 15% is a percentage by weight.

[0025] The high graphite content enhances the self-lubricating properties of the graphite copper bushing, reduces wear on the contact parts with the friction pair, and improves the overall service life and reliability.

[0026] Compared with the prior art, the beneficial effects of the spherical special machine fixture with self-lubricating wear-resistant bushing provided by this utility model are:

[0027] 1. Improved changeover efficiency: The time for changing specifications has been reduced from 30 minutes to 5 minutes;

[0028] 2. Extended lifespan: The graphite copper bushing extends the lifespan of the tie rod system;

[0029] 3. Cost reduction: Only the copper bushing is replaced instead of the entire tie rod. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the cross-sectional structure of a spherical special machine fixture with a self-lubricating wear-resistant bushing;

[0032] Figure 2 A side view of a spherical special machine fixture with a self-lubricating wear-resistant bushing;

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. 3-inch shaft; 2. Graphite copper bushing; 3. 3-inch expansion sleeve; 4. 3-inch tie rod; 5. 3-inch ball. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0036] like Figure 1-2 The image shows an embodiment of a spherical special machine clamp with a self-lubricating wear-resistant bushing provided by this utility model. In this embodiment, it includes a modular expansion sleeve assembly and a self-lubricating friction pair. The modular expansion sleeve assembly includes a 3-inch shaft 1, a 3-inch expansion sleeve 3, a 3-inch tie rod 4, and a 3-inch ball 5, which are used to achieve quick assembly and disassembly through an axial preload spring. The inner hole of the 3-inch expansion sleeve 3 and the 3-inch ball 5 adopt a conical surface fit, which facilitates the replacement of the 3-inch expansion sleeve 3. The self-lubricating friction pair adopts a graphite copper sleeve 2, which is set between the 3-inch tie rod 4 and the clamp to achieve lubrication without oiling.

[0037] In the above technical solution, the graphite copper sleeve 2 adopts an axial split design, which is positioned by a slot, and can be removed by simply removing the end cover when replacing it.

[0038] Furthermore, in the above technical solution, the 3-inch expansion sleeve 3 is a split structure.

[0039] Spring-loaded sleeves are sleeve components that clamp workpieces through elastic deformation. They need to be replaced periodically to accommodate workpieces of different specifications.

[0040] Graphite copper bushings are self-lubricating copper alloy bushings containing graphite particles, which can reduce sliding friction loss.

[0041] Furthermore, in the above technical solution, the graphite copper sleeve 2 is set as a three-section splicing structure.

[0042] Furthermore, in the above technical solution, the graphite copper sleeve 2 can be replaced with a steel sleeve containing a MoS2 coating.

[0043] Furthermore, in the above technical solution, the surface edges of the spherical special machine fixture are all set as obtuse angles.

[0044] Furthermore, in the above technical solution, the graphite copper sleeve 2 is made of graphite with a content of ≥15%.

[0045] Specifically, the principle of this utility model is as follows: When in use, the nut at the end of the pull rod is removed, the old expansion sleeve is pulled out, and a new expansion sleeve of the new specification is inserted. The pre-tightening spring automatically resets, completing the changeover operation. Graphite particles precipitate under the action of frictional heat to form a lubricating film, reducing the coefficient of friction.

Claims

1. A spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing, characterized in that, The device includes a modular expansion sleeve assembly and a self-lubricating friction pair. The modular expansion sleeve assembly includes a 3-inch shaft (1), a 3-inch expansion sleeve (3), a 3-inch tie rod (4), and a 3-inch ball (5), which are used to achieve quick assembly and disassembly through an axial preload spring. The inner hole of the 3-inch expansion sleeve (3) and the 3-inch ball (5) are fitted with a tapered surface to facilitate the replacement of the 3-inch expansion sleeve (3). The self-lubricating friction pair uses a graphite copper sleeve (2) and is set between the 3-inch tie rod (4) and the clamp to achieve lubrication without oiling.

2. The spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing according to claim 1, characterized in that, The graphite copper sleeve (2) adopts an axial split design and is positioned by a slot. When replacing it, it can be removed by simply removing the end cap.

3. A spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing according to claim 2, characterized in that, The 3-inch expansion sleeve (3) is a split structure.

4. A spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing according to claim 3, characterized in that, The graphite copper sleeve (2) is configured as a three-section splicing structure.

5. A spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing according to claim 4, characterized in that, The graphite copper sleeve (2) can be replaced with a steel sleeve with a MoS2 coating.

6. A spherical special-purpose machine fixture with a self-lubricating wear-resistant bushing according to claim 5, characterized in that, All edges of the spherical special machine fixture are set to obtuse angles.

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