Rounding grinding device

Abstract

This utility model discloses a rounded corner grinding device, including a panel. A motor mounting plate is spaced apart on the lower surface of the panel, and a drive motor is fixed on the motor mounting plate. A drive arm is provided at the drive end of the drive motor, and a swing arm is provided at the distal end of the drive arm. The proximal end of the swing arm penetrates the panel and swings under the drive of the drive arm. A flexible wheel is provided at the proximal end of the swing arm. A drive wheel and a tension wheel are provided on the upper surface of the panel, and an abrasive belt is wound around the flexible wheel, drive wheel, and tension wheel. A positioning plate is detachably provided on the panel, and a notch is formed on the positioning plate to accommodate the top corner of a sheet metal part. The notch is located at the front end of the flexible wheel and is used to define the placement position of the sheet metal. The positioning plate fixes the placement position of the sheet metal part and the rounded corner to be ground. The drive arm and swing arm drive the flexible wheel to swing, and the abrasive belt on the flexible wheel grinds the solder, burrs, and top corners on the sheet metal. The stable and reliable processing structure ensures that the grinding amplitude of each top corner on the sheet metal is consistent, thus guaranteeing the processing quality.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal processing technology, and in particular relates to a rounded corner grinding device. Background Technology

[0002] In the current sheet metal processing field, rectangular components are widely used due to their high structural strength and ease of assembly. Therefore, sheet metal is usually bent and welded into cuboid structures. However, for ergonomic safety considerations (such as avoiding sharp corner scratches) or for optimizing fluid dynamics (such as reducing wind resistance), it is often necessary to process right-angled edges into rounded corner structures.

[0003] There are two main types of solutions in existing technologies:

[0004] 1. Manual processing: An angle grinder is used for manual grinding, but the processing accuracy depends on the operator's experience, resulting in inconsistent fillet curvature radii (error of ±0.5mm or more). In addition, processing a single piece takes as long as 10-15 minutes, resulting in low production efficiency; moreover, a large amount of metal dust is generated during the processing, which is harmful to the health of the workers.

[0005] 2. Automated equipment solutions: For example, patent CN113618571B, "Automatic Grinding Fixture and Grinding Method for Rounding Corners," although it achieves basic automation, its technical solution has inherent limitations:

[0006] (1) Structural reliability defects: The sliding engagement mechanism of the swing fork and the swing arm leads to the concentrated pressure on the contact surface of the friction pair during continuous operation, resulting in faster wear rate of key components and shorter average service life.

[0007] (2) Insufficient processing adaptability: Due to the fixed spacing of the double roller positioning structure, the distance between the two rollers is constant, which makes it incompatible with the processing of medium and large sheet metal parts with large width.

[0008] (3) Dynamic accuracy decay: The radial gap (about 0.1-0.3mm) generated during the sliding of the swing arm will be transmitted to the roller and sand belt, causing the fillet profile to exceed the tolerance.

[0009] Therefore, the industry urgently needs an automated sheet metal fillet machining solution that combines high reliability, wide size adaptability, and stable machining accuracy to solve the technical bottlenecks in existing technologies, such as short equipment life and limited processing range caused by structural design defects. Utility Model Content

[0010] The purpose of this invention is to solve the aforementioned problems in the prior art and to provide a rounded corner grinding device.

[0011] The objective of this utility model is achieved through the following technical solution:

[0012] A corner grinding device includes a panel. A motor mounting plate is spaced apart on the lower surface of the panel, and a drive motor is fixed to the motor mounting plate. A drive arm is provided at the drive end of the drive motor, and a swing arm is provided at the distal end of the drive arm. The proximal end of the swing arm passes through the panel and swings under the drive of the drive arm, and a flexible wheel is provided at the proximal end of the swing arm. A drive wheel and a tension wheel are provided on the upper surface of the panel, and a sanding belt is wound around the flexible wheel, the drive wheel, and the tension wheel. A positioning plate is detachably provided on the panel, and a notch is formed on the positioning plate to accommodate the top corner of sheet metal. The notch is located at the front end of the flexible wheel and is used to define the placement position of the sheet metal.

[0013] Preferably, the drive arm is located between the panel and the motor mounting plate, and a slider is fixed at the far end of the drive arm; a groove is formed on the bottom surface of the swing arm, the slider is inserted into the groove, and the installation position of the slider is fixed by bolts.

[0014] Preferably, the swing arm is further provided with a swing arm roller, which is inserted into a slot at the bottom of the panel and slides within the range limited by the slot under the drive of the drive motor.

[0015] Preferably, the slot is arc-shaped, and there are at least two slots; a group of slots are concentrically arranged; the number of swing arm rollers is equal to the number of slots.

[0016] Preferably, the portion of the swing arm protruding from the panel is bolted to a bracket, and the flexible wheel is located within the bracket and is arranged in a vertical direction.

[0017] Preferably, the panel has a positioning area for placing the positioning plate, and the size of the positioning area is larger than that of the positioning plate; the positioning plate is fixed to the positioning area by bolts.

[0018] Preferably, the positioning plate has a waist-shaped hole for mounting bolts. The waist-shaped hole adjusts the position of the positioning plate on the panel, thereby limiting the portion of the sheet metal that protrudes from the notch and is located at the front end of the flexible wheel, and determining the grinding range.

[0019] Preferably, the panel is further provided with a micro-tube, the driving end of which is fixed to the end of the positioning plate; and the micro-tube adjusts the position of the positioning plate in the positioning area.

[0020] Preferably, the soft wheel, the drive wheel, and the tension wheel are arranged in parallel and triangular shape on the panel; wherein the drive wheel is driven to rotate by a motor.

[0021] The advantages of this utility model's technical solution are mainly reflected in:

[0022] The positioning plate fixes the placement position of the sheet metal parts and the R-angle of the grinding. Then the drive arm and swing arm drive the soft wheel to swing. The sanding belt on the soft wheel grinds the solder, burrs and top corners on the sheet metal. The stable and reliable processing structure ensures that the grinding amplitude of each top corner on the same sheet metal is consistent, and the processing quality is guaranteed.

[0023] The installation position of the drive arm and the swing arm is determined by a slider and a groove, and after the position is fixed, there is only rotational movement between the two. Compared with the existing technology, the friction is reduced, thus extending the service life.

[0024] The distance between the sheet metal part and the soft wheel and sanding belt can be adjusted by adjusting the position of the positioning plate on the panel, thereby adjusting the grinding angle of the sheet metal part; that is, the device disclosed in this utility model can meet the rounded corner grinding processing of different R values, and can also meet the processing needs of sheet metal parts of different specifications. Attached Figure Description

[0025] Figure 1 : A perspective view of a preferred embodiment of the present invention;

[0026] Figure 2 Cross-sectional view of a preferred embodiment of this utility model;

[0027] Figure 3 : Front view of a preferred embodiment of this utility model;

[0028] Figure 4 : Rear view of a preferred embodiment of the present invention. Detailed Implementation

[0029] The purpose, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of this utility model, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0030] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0031] like Figure 1 As shown, this utility model discloses a rounded corner grinding device, including a panel 1, on which a surface is formed as shown in the figure. Figure 3 The positioning area 101 shown is for placing the positioning plate 11, and the size of the positioning area 101 is larger than that of the positioning plate 11. Furthermore, the positioning plate 11 is fixed in the positioning area 101 by bolts.

[0032] Furthermore, such as Figure 3 As shown, the positioning plate 11 has a waist-shaped hole for mounting bolts. This hole adjusts the position of the positioning plate 11 on the panel 1, thereby defining the portion of the sheet metal protruding from the notch 110 and located at the front end of the flexible wheel 31, thus determining the grinding range. Furthermore, the panel 1 is also equipped with a differential cylinder 12, the drive end of which is fixed to the end of the positioning plate 11. The drive end of the differential cylinder 12 is a differential piston, which drives the positioning plate 11 to move on the panel 1, thereby automatically adjusting the position of the positioning plate 11 within the positioning area 101, ensuring grinding accuracy.

[0033] like Figure 2 As shown, motor mounting plates 20 are spaced apart on the lower surface of the panel 1. A drive motor is fixed on the motor mounting plate 20. A drive arm 21 is provided at the drive end of the drive motor, and a swing arm 22 is provided at the distal end of the drive arm 21. The proximal end of the swing arm 22 penetrates through the panel 1. The specific structure of the drive motor is known prior art and will not be described in detail here. After the drive motor is started, it will drive the drive arm 21 to rotate, and then the swing arm 22 will swing under the drive of the drive arm 21.

[0034] Furthermore, the drive arm 21 is located between the panel 1 and the motor mounting plate 20. The drive motor is preferably positioned near the center of the drive arm 21, and the drive arm 21 at the location of the drive motor has a relatively large width, making the installation of the drive motor more stable. A slider 211 is fixed to the distal end of the drive arm 21, and a groove 220 is formed on the bottom surface of the swing arm 22. The slider 211 is inserted into the groove 220, and its installation position is fixed by bolts. The position of the swing arm 22 on the drive arm 21 is determined by the slider 211 and the groove 220, thereby adjusting the swing amplitude of the swing arm 22. Since there is no need for telescopic movement between the drive arm 21 and the swing arm 22 during processing, the friction between them is smaller than in the prior art, which to some extent extends their service life.

[0035] Furthermore, such as Figure 2As shown, the swing arm 22 is also provided with a swing arm roller 222, and the swing roller 222 is arranged opposite to the slide groove 220. Figure 2 and Figure 4 As shown, the swing arm roller 222 is inserted into the slot 10 at the bottom of the panel 1 and slides within the limited range of the slot 10 under the drive of the drive motor. The slot 10 is arc-shaped, and there are at least two slots 10. When there are multiple slots 10, they are concentrically arranged in a group, and the width of each slot 10 is equivalent to the outer diameter of the swing arm roller 222. The number of swing arm rollers 222 is equal to the number of slots 10. By assembling the swing arm rollers into the slots and adjusting the number of swing arm rollers engaged with the slots 10, the distance between the swing arm 22 and the sheet metal part can be adjusted, thereby adjusting the R value of the polished corner.

[0036] A flexible roller 31 is provided near the end of the swing arm 22. A drive roller 32 and a tension roller 33 are provided on the upper surface of the panel 1. The flexible roller 31, the drive roller 32, and the tension roller 33 are parallel and triangularly distributed on the panel 1; wherein the drive roller 32 is driven to rotate by a motor. An abrasive belt is wound around the flexible roller 31, the drive roller 32, and the tension roller 33, and is driven to rotate by the motor to polish the sheet metal part near the abrasive belt. A positioning plate 11 is also detachably provided on the panel 1. The positioning plate 11 has a notch 110 formed on it to accommodate the top corner of the sheet metal. The notch 110 is located at the front end of the flexible roller 31 and is used to define the placement position of the sheet metal.

[0037] like Figure 2 As shown, the portion of the swing arm 22 protruding from the panel 1 is bolted to a bracket 223, and the flexible wheel 31 is located within the bracket 223 and is arranged vertically. When adapting to rounded corners with different grinding angles, the flexible wheel 31, i.e., the bracket 223, with different diameters or specifications can be replaced to improve adaptability and flexibility of use.

[0038] The working process of this utility model is as follows: Loosen the bolts on the positioning plate, determine the scale of the micrometer tumbler adjustment according to the thickness of the sheet metal after bending and welding, so that the micrometer tumbler adjusts the position of the positioning plate according to the scale. Then slide the swing arm 22 along the drive arm 21 until the slider 211 moves to the corresponding scale position and is fixed. Start the drive motor, so that the drive arm 21 swings, thereby driving the swing arm 22 to slide in the slot 10. At the same time, the soft wheel 31 swings synchronously with the swing arm 22. At the same time as starting the drive motor, the motor connected to the drive wheel 32 is also started. At this time, the soft wheel 31 and the tension wheel 33 are rotated simultaneously through the sanding belt. Finally, place the sheet metal part on the panel 1 and gradually move the sheet metal part closer to the sanding belt until the two side walls of the sheet metal part abut against the inner wall of the positioning plate 11. The solder, burrs and right angles on the sheet metal part will gradually become rounded corners under the swinging sanding belt until the sanding is finished, and the processing is completed. During this process, all components are in fixed positions, thus ensuring the quality and consistency of the polishing.

[0039] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A corner grinding device, characterized in that: The panel (1) includes a motor mounting plate (20) spaced apart on the lower surface of the panel (1). A drive motor is fixed on the motor mounting plate (20). A drive arm (21) is provided at the drive end of the drive motor. A swing arm (22) is provided at the far end of the drive arm (21). The near end of the swing arm (22) passes through the panel (1) and swings under the drive of the drive arm (21). A soft wheel (31) is provided at the near end of the swing arm (22). A drive wheel (32) and a tension wheel (33) are provided on the upper surface of the panel (1). A sanding belt is wound around the soft wheel (31), the drive wheel (32) and the tension wheel (33). A positioning plate (11) is detachably provided on the panel (1). A notch (110) is formed on the positioning plate (11) to accommodate the top corner of the sheet metal. The notch (110) is located at the front end of the soft wheel (31) and is used to limit the placement position of the sheet metal.

2. The rounded corner grinding device according to claim 1, characterized in that: The drive arm (21) is located between the panel (1) and the motor mounting plate (20), and a slider (211) is fixed at the far end of the drive arm (21); a groove (220) is formed on the bottom surface of the swing arm (22), the slider (211) is inserted into the groove (220), and the installation position of the slider (211) is fixed by bolts.

3. The rounded corner grinding device according to claim 2, characterized in that: The swing arm (22) is also provided with a swing arm roller (222), which is inserted into the slot (10) at the bottom of the panel (1) and slides within the range of the slot (10) under the drive of the drive motor.

4. The rounded corner grinding device according to claim 3, characterized in that: The slot (10) is arc-shaped, and there are at least two slots (10); a group of slots (10) are concentrically arranged; the number of swing arm rollers (222) is equal to the number of slots (10).

5. The rounded corner grinding device according to claim 4, characterized in that: The portion of the swing arm (22) protruding from the panel (1) is bolted to a bracket (223), and the soft wheel (31) is located inside the bracket (223) and is arranged in the vertical direction.

6. The corner polishing device according to claim 5, characterized in that: The panel (1) has a positioning area (101) for placing the positioning plate (11), and the size of the positioning area (101) is larger than that of the positioning plate (11); the positioning plate (11) is fixed in the positioning area (101) by bolts.

7. The rounded corner grinding device according to claim 6, characterized in that: The positioning plate (11) has a waist-shaped hole for mounting bolts. The waist-shaped hole adjusts the position of the positioning plate (11) on the panel (1), thereby limiting the portion of the sheet metal that protrudes from the notch (110) and is located at the front end of the soft wheel (31) and determining the grinding range.

8. The rounded corner grinding device according to claim 7, characterized in that: The panel (1) is also provided with a micro-cylinder (12), the driving end of which is fixed to the end of the positioning plate (11); and the micro-cylinder (12) adjusts the position of the positioning plate (11) in the positioning area (101).

9. The rounded corner grinding device according to claim 8, characterized in that: The soft wheel (31), the drive wheel (32) and the tension wheel (33) are arranged in parallel and in a triangular shape on the panel (1); wherein the drive wheel (32) is driven to rotate by a motor.

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