Sheet material thinning tool and polishing device

Abstract

The utility model belongs to the field of grinding processing technology, specifically provides a sheet material grinding thin tool and polishing device. The feeding channel in sheet material grinding thin tool is along the up and down direction and is through the tool body, and is connected with the accommodating cavity of bottom, and the polishing unit is contained in the accommodating cavity, and the sheet material enters the feeding channel from top to bottom, and removes along the horizontal discharge groove. Polishing unit can polish the sheet material in the discharge groove. The horizontal discharge groove is provided, and the polishing unit is parallel to the discharge groove, which helps to ensure the thickness uniformity of the polishing area. The feeding channel is used for the sheet material to pass through, which can limit the sheet material and ensure that the sheet material is always guided and constrained during polishing. Compared with the handheld sheet material polishing method, the tool helps to reduce the shaking or deviation of the sheet material, improve the polishing precision and consistency, and meet the processing requirements of small-range local thinning of flexible sheet material.

Description

Technical Field

[0001] This application belongs to the field of grinding technology, specifically a tooling and grinding device for thinning sheet materials. Background Technology

[0002] Common flexible sheets such as rubber sheets, rubber strips, and composite material sheets may require controlled thickness reduction in specific areas during use. For example, when joining the ends of a rubber sheet to form a cylindrical workpiece, the joining area needs to be thinned to improve the bonding strength. Thinning reduces the overall thickness at the joining point, and the roughened surface created by grinding also contributes to a stronger bond. In manufacturing high-performance seals, grooves of a specific depth need to be machined into the gasket to ensure its thickness matches the shape of the part.

[0003] Thinning specific areas of sheet metal to a controllable thickness is a common but technically demanding process. Currently, the mainstream methods for achieving this are manual grinding or grinding using a general-purpose surface grinder with simple fixtures. Manual grinding relies heavily on the operator's experience and feel, resulting in inherent drawbacks such as difficulty in precision control, poor repeatability, and low efficiency. It not only struggles to guarantee consistency in batches but also easily leads to the scrapping of entire sheets of material due to over-grinding or uneven stress. While large general-purpose surface grinders can achieve good flatness, they are primarily designed for grinding entire surfaces or large areas, making them less suitable for small-scale, localized thinning. They also present complex clamping and positioning issues, and their high purchase cost makes them uneconomical for small and medium-sized production enterprises. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a tooling and grinding device for thinning sheet materials to solve the technical problem that the precision is not easy to control when manually grinding sheet materials.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this application provides a tooling for thinning sheet material, comprising a tooling body, the lower part of which has a receiving cavity for accommodating a grinding unit, the tooling body having a feeding channel extending through the thickness of the tooling body in a vertical direction, the upper end of the feeding channel forming a feed inlet, the lower end of the feeding channel communicating with the receiving cavity, the top wall of the receiving cavity having a discharge groove, one end of the discharge groove communicating with the lower end of the feeding channel, the other end of the discharge groove extending through the tooling body in a horizontal direction forming a discharge outlet, the bottom plane of the discharge groove being parallel to the grinding plane of the grinding unit and spaced apart by a predetermined distance, the predetermined distance being less than the thickness of the sheet material, and the predetermined distance may be 2mm, 3mm, 3.5mm, etc.

[0006] In one possible implementation, the feeding channel is inclined in the vertical direction, and the discharge trough is opened on the side of the top wall of the receiving cavity that forms an obtuse angle with the feeding channel.

[0007] In one possible implementation, the sheet thinning tooling further includes a thickness adjustment plate detachably disposed on the discharge trough.

[0008] In one possible implementation, the thickness adjustment plate has a first mounting hole that penetrates its own thickness. The first mounting hole is a countersunk hole. The bottom surface of the discharge trough has a second mounting hole that is coaxial with the first mounting hole. A screw passes through the first mounting hole and is threaded into the second mounting hole.

[0009] In one possible implementation, fixing holes are provided at both ends of the tooling body.

[0010] In one possible implementation, the upper surface of the tooling body has a chamfered edge on the side adjacent to the discharge chute.

[0011] Compared with the prior art, the beneficial effects of the sheet grinding tool provided in this application are: The sheet thinning fixture provided in this application has a feeding channel that runs vertically through the fixture body and connects to a receiving cavity at the bottom. The grinding unit is housed within the receiving cavity. The sheet enters the feeding channel from top to bottom and moves horizontally out along the discharge chute. The grinding unit can perform localized grinding on the sheet located within the discharge chute. The discharge chute is horizontally positioned, and the grinding unit is parallel to it, which helps ensure the uniformity of thickness in the grinding area. The feeding channel allows the sheet to pass through and provides restraint, ensuring that the sheet is always guided and constrained during grinding. Compared to hand-held sheet grinding, this fixture helps reduce sheet wobbling or offset, improves grinding accuracy and consistency, and meets the processing requirements for small-area localized thinning of flexible sheets. Although there are differences in automation and grinding effect compared to grinding with a grinding machine, it has a simpler structure, is easier to manufacture, and has lower manufacturing costs.

[0012] Secondly, this application provides a polishing apparatus, comprising: A sheet metal thinning tooling as described in any of the above implementations; and A polishing unit is located in the receiving cavity.

[0013] In one possible implementation, the polishing unit is a polishing belt arranged parallel to the discharge trough, and the distance between the polishing belt and the top wall of the receiving cavity is less than the thickness of the sheet.

[0014] Compared with the prior art, the grinding device provided in this application adopts the sheet grinding tooling in any of the above-mentioned implementation methods and has the same technical effect, which will not be described in detail here. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram illustrating the use of the sheet grinding fixture provided in the embodiments of this application; Figure 2 An internal sectional view of the sheet grinding fixture provided in the embodiments of this application in its use state; Figure 3 for Figure 2 Enlarged view of part A in the middle; Figure 4 A cross-sectional perspective view of the sheet grinding fixture provided in the embodiments of this application in its use state; Explanation of reference numerals in the attached figures: 10. Tooling body; 11. Feeding channel; 12. Thickness adjustment plate; 13. Fixing hole; 14. Beveled chamfer; 20. Grinding unit; 30. Sheet to be ground. Detailed Implementation

[0017] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0018] 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.

[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0020] 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 application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] Please refer to the following: Figures 1 to 4 The following describes a tooling and grinding device for thinning sheet material provided in the embodiments of this application.

[0023] In a first aspect, embodiments of this application provide a sheet metal thinning fixture, including a fixture body 10. The lower part of the fixture body 10 has a receiving cavity for accommodating a grinding unit 20. The fixture body 10 has a feeding channel 11 extending through the thickness of the fixture body 10 in a vertical direction. The upper end of the feeding channel 11 forms an inlet for feeding sheet metal. The lower end of the feeding channel 11 communicates with the receiving cavity. The top wall of the receiving cavity has a discharge groove formed in a horizontal direction. One end of the discharge groove communicates with the lower end of the feeding channel 11, and the other end of the discharge groove extends through the fixture body 10 in a horizontal direction to form an outlet. The bottom plane of the discharge groove is parallel to the grinding plane of the grinding unit 20 and is spaced apart by a predetermined distance. The sheet metal extends from the lower end of the feeding channel 11, enters the discharge groove after being bent, and finally extends out from the outlet. The grinding unit 20 can thin the sheet metal located in the discharge groove.

[0024] The predetermined distance between the bottom plane of the discharge trough and the grinding unit 20 can be set according to the target thickness of the sheet being ground, and usually needs to take into account the influence of factors such as material elasticity and grinding speed, and make certain compensations. For example, if the sheet needs to be ground to 2mm, the predetermined distance can be based on 2mm with a small compensation amount. Specifically, 2mm can usually be determined as the basic value of the spacing first, and then the spacing between the bottom plane of the discharge trough and the grinding unit 20 can be gradually adjusted based on this. The final predetermined distance can be determined through trial grinding. The tooling body 10 is plate-shaped or block-shaped, and the tooling body 10 can be made of materials such as aluminum alloy, stainless steel or engineering plastics. Aluminum alloy is lightweight and wear-resistant, suitable for frequent use; stainless steel is corrosion-resistant and high-strength, suitable for humid environments; engineering plastics are low-cost and have good insulation, suitable for light-load applications.

[0025] The feeding channel 11 and the discharge chute can have rectangular or other shaped cross sections, the cross-sectional shape and size of which are adapted to the sheet 30 to be ground. The height of the feeding channel 11 should be slightly greater than the thickness of the sheet to ensure that the sheet can move smoothly within the feeding channel 11.

[0026] The tooling body 10 can be designed as a one-piece component, obtained by casting, while the feeding channel 11 and the discharge chute can be machined by wire cutting. Alternatively, the tooling body 10 can also adopt a modular assembly design, assembled from multiple parts, which facilitates manufacturing and maintenance.

[0027] The feeding channel 11 can be set vertically or inclined in the vertical direction. When the feeding channel 11 is inclined, the inclination angle with the horizontal plane can be 40-70°. The discharge chute should be opened on the side of the top wall of the receiving cavity that forms an obtuse angle with the feeding channel 11. Designing the feeding channel 11 as inclined, with a larger angle between the feeding channel 11 and the discharge chute, helps to reduce the bending stress of the sheet at the connection point between the feeding channel 11 and the discharge chute, reduces the initial impact force between the sheet and the grinding unit 20, and makes the grinding process smoother.

[0028] Initially, the grinding unit 20 is in the off state. During grinding, the sheet material 30 to be ground (such as a 2mm thick rubber strip or sheet) is inserted into the feeding channel 11 from top to bottom, so that the sheet material 30 reaches the discharge chute. The two ends of the sheet are manually pressed to keep it taut and fixed. At this time, the sheet material and the grinding unit 20 are in an interference fit. Then, the grinding unit 20 is started, and it grinds the sheet material. After grinding, the grinding unit 20 is turned off. When multiple areas on the sheet need to be thinned, the position of the sheet needs to be adjusted after each grinding cycle. During the adjustment, the grinding unit 20 is in the off state; after adjustment, the grinding unit 20 is restarted. The debris generated by the grinding unit 20 falls directly to the ground below. After the operation, the debris is cleaned up.

[0029] It should be noted that the sheet thinning fixture provided in this embodiment requires manual gripping of both ends of the sheet and pressing the sheet firmly against the fixture body 10 during use. Therefore, it is impossible to grind the ends of the sheet. However, in actual use, there may be a need to thin the ends of the sheet. In such cases, a cutting allowance can be left in advance, and the allowance can be removed after grinding to obtain a sheet with thinned ends.

[0030] For example, when it is necessary to obtain a product with a length of 1m, a 10cm end portion that has been thinned by 0.5mm, first cut a raw material with a length of 1.2m, then use the sheet thinning tool provided in the embodiments of this application to thin the portion with a length of 90-100cm. After the thinning is completed, remove the sheet and cut off the excess 20cm.

[0031] Please see Figure 3 The sheet thinning tooling also includes a thickness adjustment plate 12 detachably mounted on the discharge trough. The thickness adjustment plate 12 is installed at the bottom of the discharge trough and can adjust the depth of the discharge trough, thereby changing the distance between the bottom plane of the discharge trough (after the thickness adjustment plate 12 is installed, the bottom plane of the discharge trough is also the surface of the thickness adjustment plate 12) and the grinding plane of the grinding unit 20, so that it reaches a predetermined distance.

[0032] The thickness adjustment plate 12 is located in the discharge chute. In actual use, multiple thickness adjustment plates 12 of different thickness specifications can be processed, such as 5mm, 6mm, 4mm, etc. By replacing the thickness adjustment plate 12 of different specifications, the remaining thickness after the sheet is thinned can be precisely controlled to meet different processing requirements. Multiple thickness specifications can be processed without replacing the entire tooling, making it more versatile.

[0033] The thickness adjustment plate 12 can be made of spring steel, stainless steel, or hard plastic to ensure wear resistance and dimensional stability. The thickness adjustment plate 12 is generally designed as a flat plate, and its surface can be laser-etched with thickness markings to improve readability. The thickness adjustment plate 12 can be used individually or in multiple stacks for easy and quick replacement and adjustment.

[0034] The thickness adjustment plate 12 has a first mounting hole that penetrates its own thickness. The first mounting hole is a countersunk hole. The bottom surface of the discharge trough has a second mounting hole that is coaxial with the first mounting hole. A screw passes through the first mounting hole and is threaded into the second mounting hole.

[0035] The thickness adjustment plate 12 is connected to the second mounting hole on the bottom of the discharge chute via countersunk holes and screws. The countersunk hole design prevents the screw head from protruding from the surface of the adjustment plate, avoiding interference when the sheet moves. The screw connection ensures the stability of the thickness adjustment plate 12 under grinding vibration, preventing displacement that could lead to thickness errors.

[0036] Please see Figure 1 Fixing holes 13 are provided at both ends of the fixture body 10. The fixing holes 13 allow the fixture body 10 to be fixed to the worktable or external support by bolts, which improves the stability of the fixture during use and avoids displacement caused by vibration or force, thereby ensuring grinding accuracy.

[0037] Please see Figure 1 , Figure 2and Figure 4 The upper surface of the tooling body 10 is provided with a chamfered edge 14 on the side adjacent to the discharge chute. The chamfered edge 14 can be designed as a 45° chamfer. The chamfered edge 14 is located on the side of the upper surface adjacent to the discharge chute, which can guide the sheet material to be smoothly drawn out of the discharge chute. The operator presses the drawn-out sheet material against the chamfered edge 14 to prevent the sheet material from moving during grinding.

[0038] Secondly, embodiments of this application also provide a grinding apparatus, including the aforementioned sheet thinning tooling and a grinding unit 20, which is disposed in a receiving cavity. The grinding unit 20 is a grinding belt arranged parallel to the discharge chute, and the distance between the grinding belt and the top wall of the receiving cavity is less than the thickness of the sheet.

[0039] The grinding device provided in this application integrates the above-mentioned sheet thinning tooling and grinding unit 20, and with the cooperation of manual labor, can better achieve local thinning operation for flexible and bendable sheets, which helps to improve the uniformity of grinding thickness and grinding efficiency.

[0040] The grinding unit 20 uses a recirculating grinding belt and can be designed as a speed-adjustable drive, powered by a motor. The structure and usage of the grinding unit 20 are existing technologies, and its specific specifications are not limited. The grinding belt maintains a distance less than the sheet thickness from the top wall of the discharge chute, ensuring the sheet is forcibly thinned as it passes through. The feeding channel 11 and discharge chute of the tooling body 10 guide the sheet precisely to the grinding area. Activating the grinding unit 20 allows for the thinning of specific locations on the sheet.

[0041] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0042] 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.

Claims

1. A tooling for thinning sheet material, characterized in that, Includes a tooling body (10), the lower part of which has a receiving cavity for accommodating a grinding unit (20); The tooling body (10) has a feeding channel (11) that runs through the tooling body (10) in the vertical direction. The upper end of the feeding channel (11) forms a feeding port, and the lower end is connected to the receiving cavity. The top wall of the receiving cavity is provided with a discharge groove. One end of the discharge groove is connected to the lower end of the feeding channel (11), and the other end passes through the tooling body (10) to form a discharge port. The bottom plane of the discharge groove is parallel to the grinding plane of the grinding unit (20) and is spaced at a predetermined distance.

2. The tooling for thinning sheet material according to claim 1, characterized in that, The feeding channel (11) is inclined in the vertical direction, and the discharge trough is opened on the side of the top wall of the receiving cavity that forms an obtuse angle with the feeding channel (11).

3. The tooling for thinning sheet material according to claim 1, characterized in that, The sheet thinning tooling also includes a thickness adjustment plate (12) that is detachably disposed on the discharge trough.

4. The tooling for thinning sheet material according to claim 3, characterized in that, The thickness adjustment plate (12) has a first mounting hole that penetrates its own thickness. The first mounting hole is a countersunk hole. The bottom surface of the discharge trough has a second mounting hole that is coaxial with the first mounting hole. A screw is inserted in the first mounting hole and the screw is threaded into the second mounting hole.

5. The tooling for thinning sheet material according to claim 1, characterized in that, Fixing holes (13) are respectively provided at both ends of the tooling body (10).

6. The tooling for thinning sheet material according to claim 1, characterized in that, The upper surface of the tooling body (10) is provided with a chamfered edge (14) on the side adjacent to the discharge chute.

7. A polishing device, characterized in that, include: A tooling for thinning sheet material as described in any one of claims 1-6; as well as A polishing unit (20) is provided in the receiving cavity.

8. A polishing device according to claim 7, characterized in that, The grinding unit (20) is a grinding belt arranged parallel to the discharge trough, and the distance between the grinding belt and the top wall of the receiving cavity is less than the thickness of the sheet.

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