Double-t-shaped composite specimen clamping tool for magnetic grinder platform

Abstract

The utility model discloses a kind of double T-shaped composite sample clamping tool for magnetic grinder platform, it is related to T-shaped composite sample clamping technical field.It includes detachable horizontal installation on magnetic grinder platform's limiting round baffle ring, limiting round baffle ring inner ring side horizontal is equipped with the rotation round plate of being able to axial rotation and being non-magnetic material, rotation round plate upper surface horizontal placement has the cross-shaped mounting frame of being able to the T-shaped composite sample of two pieces back-to-back symmetrical arrangement clamping, cross-shaped mounting frame is magnetic metal frame.The utility model provides a kind of double T-shaped composite sample clamping tool for magnetic grinder platform, this tool aims at realizing the quick, accurate, stable clamping of part, supports double piece simultaneous processing and in situ quick reversing, to effectively improve machining precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of T-shaped composite sample clamping technology, and in particular to a double T-shaped composite sample clamping fixture for a magnetic grinding machine platform. Background Technology

[0002] like Figure 1 The T-shaped composite material specimen shown is an important type of test piece for testing the mechanical properties of composite materials. These specimens have extremely high requirements for dimensional accuracy, especially width, and typically require precision grinding to meet design requirements. However, the non-metallic and non-magnetic nature of composite materials presents the following technical challenges and drawbacks to their clamping and processing on traditional magnetic grinding platforms: 1. Difficult clamping and positioning, affecting machining accuracy and safety: Because composite parts themselves are not magnetic, they cannot be directly attracted and fixed using the magnetic platform of the grinding machine. The conventional method is to use steel blocks magnetically attached to the platform for limiting. This method has the problems of insufficient positioning rigidity and easy occurrence of slight displacement, making it difficult to guarantee the grinding accuracy of the parts. At the same time, under the action of grinding force, there is a safety hazard of parts loosening; 2. Low processing efficiency: On the one hand, limited by the clamping method, traditional methods can only clamp and process single parts, resulting in a long idle stroke of the grinding head and a long processing time per part. On the other hand, T-shaped parts contain multiple surfaces that need to be ground. When machining a surface in one direction is completed, and machining is required in another direction perpendicular to it (such as a rib), the part must be completely disassembled, its orientation readjusted, and it must be clamped again. This process is cumbersome and time-consuming, severely restricting the overall processing efficiency. 3. Precision errors caused by clamping process: When using mechanical methods such as bolts to directly clamp composite parts, the process of tightening the bolts may cause slight displacement of the parts, making it impossible for their reference surface to remain parallel to the worktable plane. Grinding under these conditions will introduce machining errors, making it difficult to meet the high and wide dimension requirements of the parts.

[0003] Therefore, there is an urgent need for a special tooling that can achieve rapid and accurate positioning and reversal, support the simultaneous and efficient processing of multiple parts, and ensure the stability and safety of the processing process. Utility Model Content

[0004] The purpose of this invention is to provide a double T-shaped composite sample clamping fixture for a magnetic grinding machine platform. This fixture aims to achieve rapid, accurate, and stable clamping of parts, support simultaneous processing of two parts and rapid in-situ reversal, thereby effectively improving processing accuracy and efficiency.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is: a double T-shaped composite sample clamping fixture for a magnetic grinding machine platform, including a detachable horizontally mounted limiting circular stop ring on the magnetic grinding machine platform, a rotating circular plate of non-magnetic material that can rotate axially on the inner ring side of the limiting circular stop ring, and a cross-shaped mounting frame that can clamp two T-shaped composite samples arranged back to back symmetrically placed on the upper surface of the rotating circular plate, wherein the cross-shaped mounting frame is a magnetic metal frame.

[0006] As a further improvement of this utility model, the limiting circular stop ring is a non-magnetic ring, and an outer mounting ring surface is provided on the outer ring side of the limiting circular stop ring, and two magnetic seats are provided on the outer mounting ring surface opposite to each other on both sides of the limiting circular stop ring.

[0007] As a further improvement of this utility model, the lower surface of the rotary circular plate is covered with a friction-reducing plate that contacts the magnetic grinding machine platform.

[0008] As a further improvement of this utility model, the upper surface of the rotating circular plate is covered with an elastic sheet that contacts the cross-shaped mounting frame.

[0009] As a further improvement of this utility model, the rotating circular plate and the elastic sheet are each provided with a cross-shaped positioning port corresponding to the two T-shaped composite material samples, and the lower surface of the T-shaped composite material sample passes through the cross-shaped positioning port and contacts the friction-reducing plate.

[0010] As a further improvement of this utility model, the rotating circular plate is provided with a rotating handle vertically on its edge.

[0011] As a further improvement of this utility model, there are four rotating handles, and the four rotating handles are symmetrically arranged around the axis of the rotating circular plate.

[0012] As a further improvement of this utility model, the cross-shaped mounting frame is provided with multiple sets of locking screws for horizontally clamping T-shaped composite material samples.

[0013] Beneficial effects Compared with the prior art, the advantages of the double T-shaped composite sample clamping fixture for magnetic grinding machine platform of this utility model are as follows: 1. Achieved stable and high-precision indirect magnetic clamping: Using a cross-shaped mounting frame made of magnetic metal as a medium, the magnetic force of the grinding machine platform firmly attracts the cross-shaped mounting frame, thereby indirectly fixing the composite parts clamped by locking screws. This rigid connection effectively prevents part displacement and vibration during processing, greatly improving grinding accuracy and operational safety, and overcoming the shortcomings of traditional stop block limiting. 2. Significantly improved processing efficiency: The tooling design allows for the simultaneous back-to-back clamping of two T-shaped composite material samples, doubling the effective processing capacity of the grinding equipment in a single run, greatly reducing the idle stroke of the grinding head, and significantly improving processing efficiency. 3. Enables rapid and precise in-situ reversal: Through the rotatable rotary plate design, when machining another vertical surface of the part is required, simply release the platform's magnetism, rotate the entire fixture (including the part) 90 degrees using the rotating handle, and then magnetically fix it back in place. This process eliminates the need to disassemble parts and readjust, simplifying the complex reversal process into a single, simple rotation operation. It provides accurate positioning, minimal auxiliary time, and completely solves the bottleneck problem of low efficiency in multi-face machining of T-shaped parts. 4. Optimized stress state ensures geometrical accuracy: The anti-friction plate installed under the rotating circular plate effectively reduces friction during rotation, making reversing operations easier and smoother. Simultaneously, the part's reference surface is ultimately pressed onto the anti-friction plate by the powerful platform magnetism through the cross-shaped mounting frame, avoiding slight warping or displacement of the part that might occur with clamping only by locking screws. This ensures the stability and reliability of the machining reference, thereby guaranteeing the part's high width and geometrical tolerance requirements. 5. The design is reasonable and the operation is safe and convenient: the symmetrical design of the rotary handle facilitates the application of force; the elastic plate not only cushions and protects the surface of the parts but also ensures a tighter contact; the cooperation between the magnetic base and the limiting ring ensures the initial positioning stability of the entire fixture. The entire fixture has a compact structure, simple operation process, and high safety and ease of use.

[0014] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0016] Figure 1 A three-dimensional view of the T-shaped composite sample; Figure 2 This is an exploded view of the present invention; Figure 3 This is a diagram showing the usage state of this utility model.

[0017] Wherein: 1-Limiting circular retaining ring; 11-Outer mounting ring surface; 12-Magnetic base; 2-Rotating circular plate; 21-Friction-reducing plate; 22-Elastic sheet; 23-Cross positioning port; 24-Rotating handle; 3-Cross-shaped mounting frame; 31-Locking screw; 4-T-shaped composite material sample. Detailed Implementation

[0018] 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. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] Example: The specific embodiments of this utility model are as follows: Figure 2-3 As shown, a double T-shaped composite sample clamping fixture for a magnetic grinding machine platform is designed to solve the problems of unstable clamping, low efficiency, and difficulty in reversing orientation of T-shaped composite samples on a magnetic grinding machine through a rotatable, integrated clamping platform. The fixture mainly consists of three parts: a limiting circular retaining ring 1, a rotating circular plate 2, and a cross-shaped mounting frame 3.

[0022] The limiting circular retaining ring 1 is horizontally mounted on the magnetic grinding machine platform in a detachable manner. In this embodiment, the limiting circular retaining ring 1 is preferably made of non-magnetic materials such as aluminum alloy to avoid interfering with the magnetic field of the magnetic platform. Its outer ring side has a horizontal outer mounting ring surface 11, on which two magnetic seats 12 are mounted opposite each other on both sides of the limiting circular retaining ring 1. By adsorbing onto the grinding machine platform through the magnetic seats 12, rapid and preliminary positioning and fixation of the tooling can be achieved, providing a stable reference for subsequent operations.

[0023] The rotating circular plate 2 is horizontally positioned on the inner ring side of the limiting circular stop ring 1 and can rotate freely axially within the inner ring. The rotating circular plate 2 must be made of a non-magnetic material (such as aluminum alloy or engineering plastic) to ensure that the magnetic force of the magnetic platform can penetrate it and act directly on the cross-shaped mounting frame 3 above.

[0024] In this embodiment, to achieve easy rotation, a rotating handle 24 is vertically provided on the edge of the rotary disc 2. A preferred embodiment is to provide four rotating handles 24, arranged in a rotationally symmetrical manner around the axis of the rotary disc 2. This design allows the operator to apply force from any angle, achieving effortless and smooth rotation. Simultaneously, to reduce friction during rotation, a friction-reducing plate 21 is provided on the lower surface of the rotary disc 2. This friction-reducing plate 21 is made of a low-friction coefficient material such as polytetrafluoroethylene (PTFE) or oil-impregnated nylon and directly contacts the magnetic grinding platform. Meanwhile, an elastic sheet 22 is provided on the upper surface of the rotary disc 2. This elastic sheet 22 can be made of rubber or polyurethane. Its function is to provide a slight elastic compensation when the cross-shaped mounting frame 3 is magnetically attracted, ensuring tight contact while buffering vibration and protecting the surface of the parts. Furthermore, a cross-shaped positioning opening 23 corresponding to the shape of the two T-shaped composite material samples 4 is provided at the center of both the rotary disc 2 and the elastic sheet 22. The lower surface (reference surface) of the T-shaped composite sample 4 is positioned to contact the upper surface of the friction-reducing plate 21 through the cross-shaped positioning opening 23. This opening not only avoids parts but also provides coarse positioning for the initial placement of the parts.

[0025] Regarding the cross-shaped mounting frame 3, this component, horizontally placed on the elastic sheet 22 of the rotating circular plate 2, is the core component for directly clamping parts. Crucially, the cross-shaped mounting frame 3 is made of a magnetically conductive metal (such as low-carbon steel). This allows the powerful magnetic force to directly and firmly attract the entire cross-shaped mounting frame 3 when the magnetic grinding platform is energized. In this embodiment, the cross-shaped mounting frame 3 is equipped with multiple sets of locking screws 31 for horizontally pressing and fixing two T-shaped composite material samples 4 back-to-back within the frame. This back-to-back symmetrical arrangement allows the fixture to clamp two parts at once.

[0026] The working process and technical effect of this tooling are as follows: I. Preparation and Initial Positioning: Place the assembled tooling—including the limiting circular retaining ring 1, the rotary circular plate 2, and the cross-shaped mounting frame 3—on the grinding machine platform; The position of the limiting circular retaining ring 1 is initially fixed by the magnetic base 12. The platform's magnetic force is activated; the strong magnetic force passes through the non-magnetic rotating circular plate 2, tightly attracting the cross-shaped mounting frame 3, and stabilizing the entire system through the elastic sheet 22. At this point, precise calibration of the reference position can be performed. After calibration, the magnetic force is disconnected.

[0027] II. Clamping the parts: Two T-shaped composite material samples 4 are placed back to back into the cross-shaped mounting frame 3, and their lower ends are made to contact the friction-reducing plate 21 through the cross positioning opening 23. The worker holds the T-shaped composite sample 4 and the cross-shaped mounting frame 3, and uses locking screws 31 to clamp the two parts horizontally onto the cross-shaped mounting frame 3. It should be noted that the screw clamping force at this time is only used to prevent the parts from moving horizontally, and does not completely press the reference surface.

[0028] III. Stable Adsorption and First Surface Processing: The magnetic force of the grinding platform is activated. The magnetic force firmly attracts the cross-shaped mounting frame 3, generating a huge, vertically downward pressure. This pressure is transmitted through the frame, strongly and evenly pressing the reference surface of the T-shaped composite sample 4 onto the friction-reducing plate 21.

[0029] This step is crucial. It solves the problems of insufficient rigidity of traditional stop blocks and warping of parts caused by direct bolt tightening. The downward pressure provided by magnetic adsorption is much greater than and more uniform than the local clamping force of mechanical screws, ensuring complete and stable contact between the part's reference surface and the tooling reference surface, i.e., the anti-friction plate 21, laying a solid foundation for high-precision grinding. At the same time, rigid adsorption completely eliminates the safety hazards of displacement during processing.

[0030] Because two parts are clamped at the same time, the grinding head can complete the same surface processing of two products in one reciprocating stroke, nearly doubling the efficiency.

[0031] IV. Rapid reversal and second-side machining: After completing the first set of machined surfaces, disconnect the platform magnetism; By rotating handle 24, the entire rotating circular plate 2, along with its cross-shaped mounting frame 3 and components, can be easily rotated 90 degrees. The friction-reducing plate 21 significantly reduces rotational resistance during this process. Once the platform's magnetic force is activated again, the tooling is re-attracted and fixed, and then the other side, perpendicular to the first side, is processed.

[0032] This design is the essence of this tooling. It eliminates the tedious steps of disassembling parts, realigning, and reinstalling in traditional methods, shortening the reversing process to three simple actions: "power off - rotation - power on". Moreover, relying on the precise cooperation between the limiting circular stop ring 1 and the rotating circular plate 2, it ensures the positioning accuracy of 90-degree rotation, which greatly improves the efficiency of processing the vertical surface of the T-shaped composite sample 4.

[0033] In this fixture, the synergistic effect of the friction-reducing plate 21 and the elastic plate 22 is crucial. The friction-reducing plate 21 ensures smooth reversal, while the elastic plate 22 compensates for the microscopic unevenness of each contact surface, making the stress distribution more uniform during magnetic adsorption and further ensuring the form and position tolerances of the parts.

[0034] The symmetrical rotating handle 24, the quick positioning of the magnetic base 12, and the clear cross-shaped positioning port 23 all make the operation of the entire tooling intuitive, labor-saving, and safe.

[0035] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform, characterized in that, The device includes a detachable, horizontally mounted limiting circular ring (1) on a magnetic grinding machine platform. The inner ring of the limiting circular ring (1) is provided with a rotating circular plate (2) that is axially rotatable and made of non-magnetic material. A cross-shaped mounting frame (3) is placed horizontally on the upper surface of the rotating circular plate (2) to clamp two T-shaped composite material samples (4) arranged back to back symmetrically. The cross-shaped mounting frame (3) is a magnetic metal frame.

2. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 1, characterized in that, The limiting circular stop ring (1) is a non-magnetic ring. The outer ring side of the limiting circular stop ring (1) is provided with an outer mounting ring surface (11), and the outer mounting ring surface (11) is provided with two magnetic seats (12) arranged opposite to each other on both sides of the limiting circular stop ring (1).

3. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 1 or 2, characterized in that, The lower surface of the rotary circular plate (2) is covered with a friction-reducing plate (21) that contacts the magnetic grinding platform.

4. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 3, characterized in that, The upper surface of the rotary disc (2) is covered with an elastic sheet (22) that contacts the cross-shaped mounting frame (3).

5. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 4, characterized in that, Both the rotating circular plate (2) and the elastic sheet (22) are provided with cross-shaped positioning openings (23) corresponding to the two T-shaped composite material samples (4). The lower surface of the T-shaped composite material sample (4) passes through the cross-shaped positioning openings (23) and contacts the friction-reducing plate (21).

6. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 1, characterized in that, The rotating circular plate (2) has a vertical rotating handle (24) on its edge.

7. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 6, characterized in that, There are four rotating handles (24), and the four rotating handles are symmetrically arranged around the axis of the rotating circular plate (2).

8. The double-T-shaped composite sample clamping fixture for a magnetic grinding machine platform according to claim 1, characterized in that, The cross-shaped mounting frame (3) is provided with multiple sets of locking screws (31) for horizontally clamping T-shaped composite material samples (4).

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