A flexible grinding and polishing belt wheel

Abstract

The present invention discloses a flexible grinding and polishing belt wheel, which relates to the technical field of grinding or polishing parts. The present invention comprises an elastic support body, a connecting assembly disposed in the middle of the elastic support body, and a plurality of abrasive belt sheets disposed on the elastic support body. The abrasive belt sheets are arranged in an array with equal spacing, and adjacent abrasive belt sheets are arranged in a staggered stack. The portion of two adjacent abrasive belt sheets that contacts the circumferential surface of the support body below the stacking area serves as the supporting working surface, while the portion of the abrasive belt sheet above the stacking area serves as the grinding working surface. The dimension of the connection between the abrasive belt sheet and the circumferential surface of the support body is H1. The present invention provides a flexible grinding and polishing belt wheel with excellent grinding effect.

Description

Technical Field

[0001] The invention relates to the technical field of grinding or polishing parts, in particular to a flexible grinding and polishing belt wheel. Background Art

[0002] In the field of grinding characteristic surfaces of blade-like parts, such as the transition surface between the blade root and the blade body, the blade root arc surface, or complex blade body curved surfaces, the grinding of complex surfaces exemplified above, such as engine blades and artificial joint surfaces, has always been a quality issue in manual grinding processes and a challenge in automated grinding. When manually grinding the root fillet of blades, commonly used grinding wheels are resin grinding wheels that are less susceptible to elastic deformation or arc-shaped lobe wheels with poor elasticity. The surface quality of the part is entirely dependent on the operator's experience in controlling the grinding force, and there are often issues with the consistency of the root fillet grinding and the continuity of the transition between the blade root and the blade body. Arc-shaped lobe wheels, such as those in patents US8177608B2, US2005 / 0000166A1, and US2818693A, share the common feature that the cross-section of the grinding area is semicircular, and these products are used to grind large arc weld surfaces. When automatically grinding arc corners, the commonly used grinding wheels are nylon fiber wheels or rubber wheels. The amount of grinding removal, grinding wheel wear and compensation will affect the grinding efficiency and the grinding size and shape position accuracy; when grinding the blade body, sanding belt grinding is usually used, so different grinding methods will also cause problems with surface uniformity. Therefore, it is necessary to propose a new solution.

[0003] The existing flexible grinding and polishing belt wheel has the problem of poor grinding effect. Therefore, we propose a flexible grinding and polishing belt wheel. Summary of the Invention

[0004] The main purpose of the present invention is to provide a flexible grinding and polishing belt wheel, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a flexible grinding and polishing belt wheel, comprising an elastic support body, a connecting component is provided in the middle of the elastic support body, a plurality of sanding belt sheets are provided on the elastic support body, the plurality of sanding belt sheets are distributed in an array with equal intervals, and adjacent sanding belt sheets are staggered and stacked, wherein the parts of two adjacent sanding belt sheets that contact the circumferential surface of the support body below the stacking area are support working surfaces, and the sanding belt part of the sanding belt sheet above the stacking area is the grinding working surface, and the size of the connection between the sanding belt sheet and the circumferential surface of the support body is H1.

[0006] Specifically, the abrasive belt sheets are uniformly covered on the circumferential surface of the support body in a stacked annular array to form two adjacent abrasive belt sheets of the flexible abrasive belt wheel, for example, abrasive belt sheet one and abrasive belt sheet two are stacked up and down on the circumferential surface; the portion of abrasive belt sheet one below the stacking is the supporting working surface, and the portion of abrasive belt sheet two above the stacking is the grinding and polishing working surface; the stacking amount H1 of the supporting working surface and the grinding and polishing working surface in the rotation direction is equal. Specifically, the abrasive belt sheets are staggered and stacked front and back along the width H2 of the abrasive belt sheets, and the relationship between the size stacking amount of the stacked parts of adjacent abrasive belt sheets on the circumferential surface and the width of the abrasive belt sheets is H1≤0.5H2.

[0007] Preferably, the outer circumferential surface of the support body is in full contact with and tightly connected to the soft cloth base of the support working surface of the abrasive belt sheet. When the abrasive belt wheel is grinding and polishing, the generatrix shape of the support body is mapped to the processed surface through the edge of the support working surface of the abrasive belt sheet and the grinding and polishing working surface; the material of the support body is nylon fiber, silicone, plastic, rubber, glass fiber or thin-walled metal, and the support is provided by the support body. At the same time, the support body constructed of nylon fiber, silicone, plastic, rubber, glass fiber or thin-walled metal is used to improve the support effect and polishing effect.

[0008] Preferably, the range of the semi-cone angle α of the outer circumferential surface of the support body is: -90°<α<90°; the shape of the generatrix is ​​a straight line, a broken line or a curve.

[0009] Preferably, the width W3 of the support body is greater than or equal to the sum of the arc radii R5 and R6 on both sides of the support body 1; the width W2 of the support working surface of the sanding belt sheet is greater than or equal to the sum of the arc radii R3 and R4 on both sides of the support working surface of the sanding belt sheet; the width W1 of the grinding working surface of the sanding belt sheet is greater than or equal to the sum of the arc radii R1 and R2 on both sides of the grinding working surface of the sanding belt sheet.

[0010] Preferably, the width of the sanding belt sheet is H2, and the sanding belt sheet is staggered and stacked forward and backward along the width H2 direction of the sanding belt sheet, and the size of the adjacent stacked parts of the sanding belt sheet is H1≤0.5H2. The sanding belt sheet is covered in a manner that the soft cloth base surfaces at both ends of the sanding belt sheet are connected to the part of the support body close to the circumferential surface by bonding, metal wire connection or fiber rope knitting connection; or the soft cloth base surfaces of the supporting working surface of the sanding belt sheet and the extension surfaces to both ends are bonded to the support body, connected by metal wire or fiber rope knitting connection.

[0011] Preferably, when the abrasive belt sheet is squeezed and deformed by the polishing surface of the workpiece and the supporting body under the action of the grinding force, the main working surface of the abrasive belt sheet to be polished and the extended surface of the main working surface to be polished are squeezed to form a continuous arc transition, so that no grooves will be generated on the edge of the surface of the workpiece to be polished.

[0012] Preferably, the support body has a disc, butterfly, or bowl shape; the ends of the outer circumference of the support body are rounded or chamfered. The concave portion of the butterfly or bowl shape can avoid interference with the non-grinding area of ​​the workpiece. The figure shows the abrasive belt wheels constructed by different support body shapes of the present invention, including a disc-type flexible abrasive belt wheel, a disc-type elastic support body, a disc-type abrasive belt wheel drive connection surface, a special-shaped abrasive belt sheet, and a stacked distributed abrasive belt sheet. The special-shaped abrasive belt sheet is evenly coated on the outer circumference of the disc-type elastic support body in a stacked annular array.

[0013] Preferably, the connecting assembly includes a fixing block fixedly arranged in the middle of the supporting body, a circular groove is provided on one side of the fixing block, a plurality of square through holes are provided in the circular groove, and the plurality of square through holes are distributed in an array with equal spacing, a first mounting block is connected to the circular groove, a plurality of square columns are provided on the first mounting block, and the plurality of square columns are distributed in an array with equal spacing, and the positions of the square columns are adapted to the positions of the square through holes, and one end of the square column passes through the square through hole, and the connecting assembly also includes a driving shaft, a second mounting block is provided at one end of the driving shaft, and a plurality of circular through holes are provided on the second mounting block, and the plurality of circular through holes are distributed in an array with equal spacing A screw is fixedly connected to one end of the square column, and the screw passes through the circular through hole. A nut is threaded on the screw, and the nut fits the second mounting block. In actual use, the drive shaft is connected to the polishing grinder through the connection structure of the polishing grinder output shaft. The connection structure of the output shaft of different polishing grinders is different. The actual structure of the drive shaft is determined by the model of the polishing grinder. By placing the fixed block between the first mounting block and the second mounting block, and making the square column enter the square through hole at the same time, the screw passes through the circular through hole of the second mounting block, and finally fixed with a nut to ensure the tightness of the connection between the support body and the polishing grinder.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, when the sanding belt sheet is working, it is squeezed by the polishing surface of the workpiece and the support body under the action of the polishing force and deformed, and is in full contact with the polishing surface of the workpiece. The grinding working surface of the sanding belt sheet causes the contact shape of the polished workpiece to change. As the sanding belt wheel polishes, the support body is in full contact with the back of the sanding belt, and the generatrix shape of the support body is mapped to the shape of the polished workpiece in the form of polishing contact, thereby realizing the polishing and shaping function of the sanding belt wheel and improving the polishing effect of the flexible sanding belt wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a flexible grinding and polishing belt wheel of the present invention;

[0017] Figure 2This is a schematic top view of the structure of a flexible grinding and polishing belt wheel of the present invention;

[0018] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0019] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure at the middle BB;

[0020] Figure 5 For the present invention Figure 3 Schematic diagram of the local enlarged structure at D in the middle;

[0021] Figure 6 For the present invention Figure 4 Schematic diagram of the local enlarged structure at C in the middle;

[0022] Figure 7 This is a schematic diagram of the connection structure of two adjacent abrasive belt sheets in a flexible abrasive belt wheel of the present invention;

[0023] Figure 8 This is a schematic diagram of the overall structure of a flexible grinding and polishing belt wheel of other shapes in the present invention.

[0024] In the figure: 1. Support body; 2. Abrasive belt piece; 3. Fixed block; 4. First mounting block; 5. Square column; 6. Drive shaft; 7. Second mounting block; 8. Screw; 9. Nut; 60. Disc-type flexible abrasive belt wheel; 601. Disc-type elastic support body; 602. Disc-type abrasive belt wheel drive connection surface; 603. Special-shaped abrasive belt piece; 604. Stacked distributed abrasive belt piece. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] Please refer to Figure 1-8 As shown, the present invention is a flexible grinding and polishing belt wheel, comprising an elastic support body 1, a connecting assembly is provided in the middle of the elastic support body 1, a plurality of sanding belt pieces 2 are provided on the elastic support body 1, the plurality of sanding belt pieces 2 are distributed in an array with equal intervals, and adjacent sanding belt pieces 2 are staggered and stacked, wherein the portion of two adjacent sanding belt pieces 2 in contact with the circumferential surface of the support body 1 below the stacking area is the supporting working surface, and the sanding belt portion of the sanding belt piece 2 above the stacking area is the grinding working surface, and the size of the connection between the sanding belt piece 2 and the circumferential surface of the support body 1 is H1.

[0029] Specifically, Figure 1 The middle abrasive belt sheet 2 is evenly covered on the circumferential surface of the support body 3 in a stacked annular array to form a flexible abrasive belt wheel. Two adjacent abrasive belt sheets 2, for example, abrasive belt sheet 1 and abrasive belt sheet 2 are stacked up and down on the circumferential surface; the portion of abrasive belt sheet 1 below the stack is the supporting working surface, and the portion of abrasive belt sheet 2 above the stack is the grinding and polishing working surface; the stacking amount H1 of the supporting working surface and the grinding and polishing working surface in the rotation direction is equal. Specifically, combined with Figure 1 and Figure 2 The abrasive belt sheets 2 are stacked in a staggered manner along the width H2 of the abrasive belt sheets. The relationship between the stacking amount of the stacked parts of the adjacent abrasive belt sheets on the circumferential surface and the width of the abrasive belt sheets is H1≤0.5H2.

[0030] When the abrasive belt sheet 2 is working, it is squeezed and deformed by the polished surface of the workpiece and the support body 1 under the action of the polishing force, and is in full contact with the polished surface of the workpiece. The grinding working surface of the abrasive belt sheet 2 causes the contact shape of the polished workpiece to change. As the abrasive belt wheel polishes, the support body 1 fully contacts the back of the abrasive belt, and maps the generatrix shape of the support body 1 to the shape of the polished workpiece in the form of polishing contact, thereby realizing the grinding and shaping function of the abrasive belt wheel.

[0031] Among them, the outer circumferential surface of the support body 1 is in full contact with and tightly connected to the soft cloth base of the supporting working surface of the sanding belt sheet 2. When the sanding belt wheel is grinding and polishing, the busbar shape of the support body 1 is mapped to the processed surface through the edges of the supporting working surface and the grinding and polishing working surface of the sanding belt sheet 2; the material of the support body 1 is nylon fiber, silicone, plastic, rubber, glass fiber or thin-walled metal, and it is supported by the support body 1. At the same time, the support body 1 constructed of nylon fiber, silicone, plastic, rubber, glass fiber or thin-walled metal is used to improve the supporting effect and polishing effect.

[0032] Among them, such as Figure 6 As shown, the range of the semi-cone angle α of the outer circumferential surface of the support body 1 is: -90°<α<90°; the shape of the generatrix is ​​a straight line, a broken line or a curve.

[0033] Among them, such as Figure 6 As shown, the width W3 of the support body 1 is greater than or equal to the sum of the arc radii R5 and R6 on both sides of the support body 1; the width W2 of the support working surface of the sanding belt sheet 2 is greater than or equal to the sum of the arc radii R3 and R4 on both sides of the support working surface of the sanding belt sheet 2; the width W1 of the grinding working surface of the sanding belt sheet 2 is greater than or equal to the sum of the arc radii R1 and R2 on both sides of the grinding working surface of the sanding belt sheet 2.

[0034] Among them, the width of the sanding belt sheet 2 is H2, and the sanding belt sheet 2 is staggered and stacked front and back along the width H2 direction of the sanding belt sheet 2. The size of the stacked part of the adjacent sanding belt sheet 2 is H1≤0.5H2. The sanding belt sheet 2 is covered in a manner that the soft cloth base surface at both ends of the sanding belt sheet 2 and the part close to the circumferential surface of the support body 1 are connected by bonding, metal wire connection or fiber rope knitting; or the soft cloth base surface of the supporting working surface of the sanding belt sheet 2 and its extension surface to both ends are bonded, connected by metal wire or fiber rope knitting to the support body 1.

[0035] In the process where the sanding belt sheet 2 is squeezed and deformed by the polished surface of the workpiece and the support body 1 under the action of the grinding force, the main working surface of the sanding belt sheet 2 to be polished and the extended surface of the main working surface to be polished are squeezed to form a continuous arc transition, so that no grooves will be generated on the edge of the surface of the workpiece to be polished.

[0036] The outer shape of the support body 1 is disc-shaped, butterfly-shaped or bowl-shaped; both ends of the outer surface of the support body 1 are chamfered or chamfered, and the concave part of the butterfly or bowl shape can avoid interference with the non-grinding part of the workpiece. Figure 8 The figure shows the abrasive belt wheels of the present invention, which are constructed with different support body shapes. They include a disc-shaped flexible abrasive belt wheel 60, a disc-shaped elastic support body 601, a disc-shaped abrasive belt wheel drive connection surface 602, a special-shaped abrasive belt sheet 603, and a stacked distributed abrasive belt sheet 604. The special-shaped abrasive belt sheets 603 are evenly covered on the outer circumference of the disc-shaped elastic support body 601 in a stacked annular array.

[0037] Among them, the connecting component includes a fixed block 3 fixedly arranged in the middle of the support body 1, a circular groove is opened on one side of the fixing block 3, a plurality of square through holes are opened in the circular groove, and the plurality of square through holes are evenly spaced in an array. A first mounting block 4 is connected to the circular groove, and a plurality of square columns 5 are provided on the first mounting block 4. The plurality of square columns 5 are evenly spaced. The positions of the square columns 5 are adapted to the positions of the square through holes. One end of the square column 5 passes through the square through hole. The connecting component also includes a driving shaft 6. A second mounting block 7 is provided at one end of the driving shaft 6. The second mounting block 7 is provided with a plurality of circular through holes. The plurality of circular through holes are evenly spaced in an array. One end of the square column 5 is fixedly connected There is a screw 8, which passes through the circular through hole. A nut 9 is threaded on the screw 8, and the nut 9 fits the second mounting block 7. In actual use, the drive shaft 6 is connected to the polishing grinder through the connection structure of the polishing grinder output shaft. The output shaft connection structure of different polishing grinders is different. The actual structure of the drive shaft 6 is determined by the model of the polishing grinder. By placing the fixing block 3 between the first mounting block 4 and the second mounting block 7, and making the square column 5 enter the square through hole, the screw 8 passes through the circular through hole of the second mounting block 7, and finally fixed with a nut 9 to ensure the tightness of the connection between the support body 1 and the polishing grinder.

[0038] The working principle of the present invention is: first, the fixing block 3 is placed between the first mounting block 4 and the second mounting block 7, and at the same time, the square column 5 is inserted into the square through hole, the screw 8 passes through the circular through hole of the second mounting block 7, and finally fixed with the nut 9 to complete the tight connection between the support body 1 and the polishing grinder. When the belt piece 2 is working, it is squeezed and deformed by the polished surface of the workpiece and the support body 1 under the action of the polishing force, and is in full contact with the polished surface of the workpiece. The grinding working surface of the sanding belt piece 2 causes the contact shape of the polished workpiece to change. As the sanding belt wheel polishes, the support body 1 is in full contact with the back of the sanding belt, and the busbar shape of the support body 1 is mapped to the shape of the polished workpiece in the form of polishing contact, thereby realizing the grinding and shaping function of the sanding belt wheel.

[0039] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible grinding and polishing pulley, characterized by: The invention comprises an elastic support body (1), a connecting assembly is provided in the middle of the elastic support body (1), a plurality of sanding belts (2) are provided on the elastic support body (1), the plurality of sanding belts (2) are arranged in an array at equal intervals, and adjacent sanding belts (2) are arranged in a staggered stack, wherein the portions of two adjacent sanding belts (2) that are in contact with the circumferential surface of the support body (1) below the stacking area serve as supporting working surfaces, the sanding belt portion of the sanding belt (2) above the stacking area serves as a grinding working surface, and the sanding belts (2) are arranged in a staggered stack. The dimension of the connection with the circumferential surface of the support body (1) is H1, the width W3 of the support body (1) is greater than or equal to the sum of the arc radii R5 and R6 on both sides of the support body (1); the width W2 of the support working surface of the abrasive belt sheet (2) is greater than or equal to the sum of the arc radii R3 and R4 on both sides of the support working surface of the abrasive belt sheet (2); the width W1 of the grinding working surface of the abrasive belt sheet (2) is greater than or equal to the sum of the arc radii R1 and R2 on both sides of the grinding working surface of the abrasive belt sheet (2); The width of (2) is H2, the sanding belt sheet (2) is staggered and stacked forward and backward along the width H2 direction of the sanding belt sheet (2), and the size of the stacked parts of adjacent sanding belt sheets (2) is H1≤0.5H2. The sanding belt sheet (2) is wrapped in a manner that the soft cloth base surfaces at both ends of the sanding belt sheet (2) and the part of the support body (1) close to the circumferential surface are connected by bonding, metal wire connection or fiber rope knitting; the outer shape of the support body (1) is disc-shaped, butterfly-shaped or bowl-shaped; the connecting component includes a fixed A fixing block (3) is arranged in the middle of the support body (1), a circular groove is provided on one side of the fixing block (3), a plurality of square through holes are provided in the circular groove, and the plurality of square through holes are arranged in an array at equal intervals, a first mounting block (4) is connected in the circular groove, a plurality of square columns (5) are provided on the first mounting block (4), the plurality of square columns (5) are distributed at equal intervals, the positions of the square columns (5) and the positions of the square through holes are mutually adapted, and one end of the square column (5) passes through the square through hole.

2. The flexible grinding and polishing wheel according to claim 1, characterized in that: The outer circumferential surface of the support body (1) is in full contact with and tightly connected to the soft cloth base of the supporting working surface of the abrasive belt sheet (2); when the abrasive belt wheel is grinding and polishing, the generatrix shape of the support body (1) is mapped onto the processed surface through the edge of the supporting working surface and the grinding and polishing working surface of the abrasive belt sheet (2); the material of the support body (1) is nylon fiber, silicone, plastic, glass fiber or thin-walled metal.

3. The flexible grinding and polishing wheel according to claim 2, characterized in that: The range of the semi-cone angle α of the outer circumferential surface of the support body (1) is: -90°<α<90°; the shape of the generatrix is ​​a straight line, a broken line or a curve.

4. The flexible grinding and polishing wheel according to claim 3, characterized in that: The supporting working surface of the abrasive belt piece (2) and the soft cloth base surfaces of the surfaces extending toward both ends thereof are bonded to the supporting body (1), connected by metal wires, or knitted by fiber ropes.

5. The flexible grinding and polishing wheel according to claim 4, characterized in that: During the process in which the abrasive belt sheet (2) is squeezed and deformed by the polished surface of the workpiece and the support body (1) under the action of the grinding force, the main working surface to be polished of the abrasive belt sheet (2) and the extension surface of the main working surface to be polished transition in a continuous arc when squeezed.

6. The flexible grinding and polishing wheel according to claim 5, characterized in that: Both ends of the outer circumferential surface of the support body (1) are chamfered arcs or chamfers.

7. The flexible grinding and polishing wheel according to claim 6, characterized in that: The connecting assembly further comprises a driving shaft (6), one end of the driving shaft (6) is provided with a second mounting block (7), the second mounting block (7) is provided with a plurality of circular through holes, the plurality of circular through holes are arranged in an array at equal intervals, one end of the square column (5) is fixedly connected with a screw rod (8), the screw rod (8) passes through the circular through hole, a nut (9) is threadedly connected to the screw rod (8), and the nut (9) fits the second mounting block (7).

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