A grinding device and a grinding method for a seam line of a casting

Abstract

The present invention provides a grinding device and a grinding method for the seam line of a casting, and belongs to the technical field of casting production equipment. The design of the grinding device and the grinding method solves the problem that the grinding device in the prior art will cause damage to the substrate of the casting due to excessive grinding of the abrasive on the circumferential top of the brazing grinding wheel; and the fixture installed on the grinding device is prone to slight misalignment when clamping the casting; which leads to the problem of low production quality qualification rate of the casting. The grinding device is equipped with a brazing grinding wheel and a grinding fixture; the abrasive is attached to the grinding surfaces on both sides of the substrate, and there is no abrasive on the circumferential top of the substrate; the first correction part and the second correction part of the bottom plate of the position correction component of the grinding fixture are arranged opposite to each other, and the shape of the opposite surfaces of the two is adapted to the shape of the correction section; the correction power part drives the first correction part and the second correction part to move closer to or away from each other; the position sensing component detects the distance from the casting.

Description

Technical Field

[0001] The invention belongs to the technical field of casting production equipment, and in particular relates to a grinding device and a grinding method for a seam line of a casting. Background Art

[0002] The seam line of a casting is an inevitable phenomenon in the casting process. In order to ensure the appearance quality of the casting, eliminate stress concentration, and ensure the assembly dimensional accuracy of the casting to facilitate subsequent processing, it is necessary to use a grinding wheel to grind the seam line of the casting, as well as the gate and residual burrs during the production process of the casting.

[0003] The brazing grinding wheel can quickly remove burrs and excess material from the seam line because of its sharp abrasive. In addition, due to the brazing process, the abrasive of the brazing grinding wheel is firmly bonded to the substrate and the abrasive is evenly distributed, making the brazing grinding wheel have the advantages of high wear resistance and high precision. Therefore, when selecting a grinding wheel for grinding the seam line of a casting, the production process design often chooses a brazing grinding wheel.

[0004] At the same time, when using the brazing wheel to grind Figure 5 When the casting has a long axial length and a complex shape as shown, it is necessary to drive the casting to rotate with its center line as the axis; the grinding wheel is driven by the grinding equipment to enter between the two discs of the casting and rotate; as the grinding surface of the grinding wheel and the joint line surface on the casting disc gradually approach each other, the grinding wheel and the casting rotate relative to each other, and the abrasive on the grinding surface of the grinding wheel and the joint line surface on the casting disc generate friction, thereby grinding away the joint line.

[0005] In the above production process, the abrasive of the brazing wheel for grinding the seam line of the casting is not only distributed on the grinding surfaces on both sides, but also on the top of the circumference; this causes the brazing wheel to grind the seam line of the casting. Figure 5 In the case of the casting with a long axial length and a complex shape, although the abrasive on the grinding surface can remove the seam line, the gate and residual burrs on the grinding surface of the casting, the abrasive on the top of the circumference will cause damage to the base of the casting due to excessive grinding; secondly, the clamp used in the prior art, when clamping the casting, is prone to slight misalignment due to the special shape of the casting and the long axial length, and the slight misalignment is difficult to observe, resulting in unreliable clamping; the above two situations are likely to lead to unqualified production quality of the casting. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a grinding device and a grinding method for the seam line of a casting, which is used to solve the problem that the grinding device in the prior art may cause damage to the substrate of the casting due to excessive grinding of the abrasive on the circumferential top of the brazing grinding wheel; and the fixture installed on the grinding device is prone to slight misalignment when clamping the casting, and the slight misalignment is difficult to observe, which causes the clamping to be unreliable; which in turn leads to the problem of low production quality qualification rate of castings.

[0007] To achieve the above-mentioned purpose and other related purposes, the present invention provides a grinding device for the seam line of a casting, which is equipped with a brazing grinding wheel and a grinding fixture; the grinding fixture clamps the casting and drives the casting to rotate; the brazing grinding wheel moves toward the casting and rotates under the drive of the grinding device; the grinding wheel includes a base and an abrasive, and a positioning portion is provided on the base; the grinding fixture includes a base, an active clamping component, a driven clamping component and an active rotating power component; the active clamping component and the driven clamping component are both rotatably mounted on the base and clamp the left end and the right end of the casting respectively; the active rotating power component drives the active clamping component to rotate; the abrasive is attached to the grinding surfaces on both sides of the base, and there is no abrasive on the circumferential top of the base; the grinding fixture also includes:

[0008] A position correction component, wherein a correction section is selected in the middle of the casting, and the position correction component corrects the position of the correction section;

[0009] The position correction assembly includes a correction power unit, a first correction unit, and a second correction unit;

[0010] The first correction part and the second correction part are arranged opposite to each other, and the shapes of the opposite surfaces of the first correction part and the second correction part are adapted to the shape of the correction section;

[0011] The correction power unit drives the first correction unit and the second correction unit to move closer to or farther from each other;

[0012] Position sensing components detect the distance to the casting.

[0013] Optionally, the correction power unit is slidably mounted on the base, with the sliding direction being along the axial direction of the casting, and drives the first correction unit and the second correction unit to slide synchronously.

[0014] Optionally, the correction power unit includes a first correction power member and a second correction power member; the first correction power member drives the first correction unit to move up and down, and the second correction power member drives the second correction unit to move up and down; the first correction power member and the second correction power member are both slidably installed on the base, and the sliding directions of both are along the axial direction of the casting, and they respectively drive the first correction unit and the second correction unit to move synchronously.

[0015] Optionally, the active clamping assembly includes an active clamping power unit, a first clamping unit and a second clamping unit; the first clamping unit and the second clamping unit are arranged opposite to each other, and the active clamping power unit drives the two to move closer to or away from each other; the shape of the opposite surfaces of the first clamping unit and the second clamping unit is compatible with the shape of the left end of the casting; the passive clamping assembly includes a passive clamping power unit, a third clamping unit and a fourth clamping unit; the third clamping unit and the fourth clamping unit are arranged opposite to each other, and the passive clamping power unit drives the two to move closer to or away from each other; the shape of the opposite surfaces of the third clamping unit and the fourth clamping unit is compatible with the shape of the right end of the casting.

[0016] Optionally, it also includes a driven rotating power assembly; when the driven clamping assembly clamps the right end of the casting, the driven rotating power assembly and the driven clamping assembly are disconnected; when the driven clamping assembly releases the right end of the casting, the driven rotating power assembly and the driven clamping assembly are connected.

[0017] Optionally, the position sensing component includes a distance sensor and a sensor bracket; the sensor bracket is fixedly mounted on the base, and the distance sensor is mounted on the sensor bracket; the distance sensor is provided with a detection probe to detect the distance between it and the casting.

[0018] Optionally, the positioning portion is a positioning hole opened on the base, and the positioning hole and the base are coaxial.

[0019] Optionally, the diameter of the substrate is in the range of 30 mm ≤ D ≤ 300 mm; the width of the substrate is in the range of 1 mm ≤ t ≤ 50 mm.

[0020] Optionally, the attachment range of the abrasive starts from the outermost side of the grinding surface of the substrate.

[0021] A grinding method for a grinding device for a seam line of a casting based on the above-mentioned method comprises the following steps:

[0022] S1: the active clamping assembly clamps the left end of the casting, and the passive clamping assembly clamps the right end of the casting;

[0023] S2: the correction power unit drives the first correction unit and the second correction unit to approach each other, clamping the correction section until the opposite surfaces of the first correction unit and the second correction unit are in contact with the correction section;

[0024] S3: the correction power unit drives the first correction unit and the second correction unit to move away from each other;

[0025] S4: The position sensing component detects the distance between it and the casting; when the distance does not match the set value, the position of the casting continues to be corrected; when the distance matches the set value, the fixture proceeds to the next step;

[0026] S5: the active rotating power assembly drives the active clamping assembly to rotate;

[0027] S6: The grinding device drives the brazing grinding wheel to move toward the casting, and drives the brazing grinding wheel to rotate. As the brazing grinding wheel and the joint line surface of the casting contact and rotate with each other, the brazing grinding wheel grinds the joint line on the casting;

[0028] S7: After the seam line is eliminated by grinding, the brazing grinding wheel is driven by the grinding device to move away from the casting, and the grinding fixture stops driving the casting to rotate.

[0029] As described above, the grinding device and method for the seam line of a casting of the present invention have at least the following beneficial effects:

[0030] 1. The grinding equipment for the seam line of the casting has a design in which abrasives are attached to the grinding surfaces on both sides of the substrate, and there is no abrasive on the circumferential top of the substrate, thereby avoiding damage to the casting; and the shapes of the opposite surfaces of the first correction part and the second correction part are adapted to the shape of the correction section, the correction power part drives the first correction part and the second correction part to move closer to or farther from each other, and the position sensing component detects the distance to the casting, and then the position sensing component is combined to detect the distance between the casting and the casting after correction, thereby avoiding the problem that the fine misalignment generated by the clamp in the prior art during clamping is difficult to observe, resulting in unreliable clamping, and then leading to unqualified production quality of the casting; thereby effectively improving the quality of the casting. Figure 5 The production quality of castings with longer axial lengths and more complex shapes is shown.

[0031] 2. The grinding method of the grinding equipment for grinding the seam line of the casting can not only avoid the damage of the brazing grinding wheel to the casting through the step design based on the grinding equipment for grinding the seam line of the casting, but also can timely adjust the casting with a long axial length and a more complex shape, and the slight misalignment caused when being clamped, and can detect the slight misalignment, thereby cutting off the grinding operation, effectively improving the production quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a grinding device for a seam line of a casting according to the present invention is shown.

[0033] Figure 2 Shown is a schematic diagram of a grinding fixture of the present invention.

[0034] Figure 3 Shown is a schematic diagram of the components of the grinding fixture of the present invention.

[0035] Figure 4 Shown is a schematic diagram of a brazed grinding wheel of the present invention.

[0036] Figure 5 A schematic diagram showing a casting being ground by a grinding device for grinding the seam line of a casting according to the present invention.

[0037] Figure 6 The present invention is a flowchart showing the steps of a grinding method of a grinding device for grinding the seam line of a casting.

[0038] Component number description

[0039] Brazing grinding wheel 1, base 11, grinding surface 111, circumferential top 112, positioning hole 113, abrasive 12;

[0040] Grinding equipment 2;

[0041] Casting 3, joint line 31, correction section 32;

[0042] Grinding fixture 4, base 41;

[0043] Active clamping assembly 42, first clamping portion 421, second clamping portion 422, active clamping power portion 423;

[0044] Active rotating power assembly 43;

[0045] A driven clamping assembly 44, a third clamping portion 441, a fourth clamping portion 442, and a driven clamping power portion 443;

[0046] Position correction component 45, first correction part 451, second correction part 452;

[0047] Correction power unit 453, first correction power member 4531, second correction power member 4532;

[0048] Position sensing component 46, distance sensor 461, sensor bracket 462;

[0049] Driven rotating power component 47. DETAILED DESCRIPTION

[0050] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0051] See also Figures 1 to 6 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0052] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0053] See also Figure 1 The present invention provides a grinding device for the seam line of a casting, which is used to grind Figure 5 The seam line 31 of the casting 3 with a long axial length and a more complex shape is shown in the figure. The grinding device 2 is just like a common device, which is equipped with a brazing grinding wheel 1 and a grinding fixture 4; the grinding fixture 4 clamps the Figure 5 The brazing grinding wheel 1 is driven by the grinding device 2 to move toward the casting and rotate. The grinding surface 111 of the brazing grinding wheel 1 gradually contacts the joint line surface of the casting 3. As the brazing grinding wheel 1 and the casting 3 rotate relative to each other, the brazing grinding wheel 1 gradually grinds away the joint line 31 on the casting 3.

[0054] like Figure 2 As shown, the brazed grinding wheel 1 also includes a base 11 and an abrasive 12 . The abrasive 12 is attached to the base 11 through a brazing process. A positioning portion is provided on the base 11 for mounting the brazed grinding wheel 1 on a grinding device 2 .

[0055] The grinding fixture 4 comprises:

[0056] like Figure 3 The base 41 shown is used to install various components.

[0057] like Figure 3The active clamping assembly 42 shown is rotatably mounted on the base 41 and is used to clamp the left end of the casting 3.

[0058] like Figure 3 The active rotating power assembly 43 is used to drive the active clamping assembly 42 to rotate, thereby driving the casting 3 to rotate, so as to achieve the grinding operation of the seam line 31.

[0059] like Figure 3 The driven clamping assembly 44 shown is rotatably mounted on the base 41 to clamp the right end of the casting 3. When the active rotating power assembly 43 drives the active clamping assembly 42 to rotate and further drives the casting 3 to rotate, the driven clamping assembly 44 fully ensures the stability of the rotation of the casting 3.

[0060] However, as mentioned in the background technology, the castings 3 produced by the existing grinding equipment are prone to quality problems. In order to improve the production quality of the castings 3, the present invention improves the existing grinding equipment. The improvements are as follows:

[0061] like Figure 2 As shown, the abrasive 12 is only attached to the grinding surfaces 111 on both sides of the substrate 11, and there is no abrasive 12 on the circumferential top 112 of the substrate 11. Compared with the prior art in which the abrasive 12 of the brazing grinding wheel 1 is not only distributed on the grinding surfaces 111 on both sides, but also on the circumferential top 112; the brazing grinding wheel 1 is used for grinding some Figure 5 In the case of the casting 3 with a more complex shape, only the abrasive 12 on the grinding surface 111 is being ground; because there is no abrasive 12 on the circumferential top 112 , the base of the casting 3 will not be over-ground and damaged.

[0062] like Figure 3 As shown, the grinding fixture 4 also includes a position correction component 45. In order to cooperate with the use of the position correction component 45, we need to select a section in the middle of the casting 3 as a correction section 32. The correction section 32 is selected by the designer on the casting 3 according to the actual situation, and there is no need to specially design the casting 3. For example, Figure 5 A hexagonal section in the middle of the casting 3 is shown as the correction section 32 ; the position correction component 45 corrects the position of the correction section 32 , thereby achieving the purpose of correcting the slight misalignment of the entire casting 3 .

[0063] In order to achieve the above correction purpose, Figure 3 and Figure 4As shown, the position correction component 45 includes a correction power unit 453, a first correction unit 451 and a second correction unit 452; the first correction unit 451 and the second correction unit 452 are arranged opposite to each other, and the shapes of the opposite surfaces of the two are adapted to the shape of the correction section 32, for example, Figure 5 The correction power part 453 drives the first correction part 451 and the second correction part 452 to move closer to or away from each other; when the first correction part 451 and the second correction part 452 move closer to each other, they clamp the correction section 32, thereby correcting the position of the entire casting 3. Figure 5 When the casting 3 has a long axial length and a special shape, the grinding fixture 4 can make timely adjustments to the slight misalignment of the casting 3 .

[0064] Then through Figure 3 and Figure 4 The position sensing assembly 46 shown detects the distance from the casting 3, and controls the clamp not to perform the grinding operation when the detection result does not meet the set value. This solves the problem in the prior art that the slight misalignment generated by the clamp during clamping is difficult to observe, resulting in unreliable clamping, which in turn leads to unqualified production quality of the casting 3 and even causes production safety accidents.

[0065] That is, the combined design of the brazing grinding wheel 1 and the grinding fixture 4 effectively improves the product quality of the grinding device 2 when producing the casting 3.

[0066] In another embodiment, see Figure 3 and Figure 4 The correction power part 453 is slidably installed on the base 41, and the sliding direction is along the axial direction of the casting 3, and drives the first correction part 451 and the second correction part 452 to slide synchronously; the design of this embodiment, when clamping castings 3 with different shapes, if the middle parts of different castings 3 have the same shape but slightly different positions, the operator can drive the correction power part 453 to slide, thereby driving the first correction part 451 and the second correction part 452 to slide, so that the grinding fixture 4 can clamp two different castings 3 without replacing the first correction part 451 and the second correction part 452, thereby enhancing the applicability of the grinding fixture 4.

[0067] In another embodiment, see Figure 3 and Figure 4, the correction power unit 453 includes a first correction power member 4531 and a second correction power member 4532; the first correction power member 4531 drives the first correction unit 451 to move up and down, and the second correction power member 4532 drives the second correction unit 452 to move up and down; the first correction power member 4531 and the second correction power member 4532 are both slidably installed on the base 41 (the sliding installation of the second power member is not marked in the figure, and the specific sliding structure can be designed by the designer according to the needs, which will not be repeated here), and the sliding directions of both are along the axial direction of the casting 3, and respectively drive the first correction unit 451 and the second correction unit 452 to move synchronously; this embodiment provides a specific structural form of the correction power unit 453, and the first correction power member 4531 and the second correction power member 4532 can both use cylinders; the first correction unit 451 and the second correction unit 452 are respectively driven by the first correction power member 4531 and the second correction power member 4532, which are more reliable than being driven by one power member at the same time.

[0068] In another embodiment, see Figure 3 and Figure 4 The active clamping assembly 42 includes an active clamping power unit 423, a first clamping unit 421 and a second clamping unit 422; the first clamping unit 421 and the second clamping unit 422 are arranged opposite to each other, and the active clamping power unit 423 drives the two to move closer to or farther away from each other; the shape of the opposite surfaces of the first clamping unit 421 and the second clamping unit 422 is adapted to the shape of the left end of the casting 3; when the first clamping unit 421 and the second clamping unit 422 are close to each other, the two clamp the left end of the casting 3, and when the first clamping unit 421 and the second clamping unit 422 are away from each other, the two release the left end of the casting 3, and the first clamping unit 421 and the second clamping unit 422 can timely and flexibly adjust the clamping state of the left end of the casting 3 according to the calibration result.

[0069] like Figure 4 As shown, the driven clamping assembly 44 includes a driven clamping power part 443, a third clamping part 441 and a fourth clamping part 442; the third clamping part 441 and the fourth clamping part 442 are arranged opposite to each other, and the driven clamping power part 443 drives the two to move closer to or away from each other; the shape of the opposite surfaces of the third clamping part 441 and the fourth clamping part 442 is adapted to the shape of the right end of the casting 3; when the third clamping part 441 and the fourth clamping part 442 are close to each other, the two clamp the right end of the casting 3, and when the third clamping part 441 and the fourth clamping part 442 are away from each other, the two release the right end of the casting 3, and the third clamping part 441 and the fourth clamping part 442 can timely and flexibly adjust the clamping state of the right end of the casting 3 according to the calibration result.

[0070] The structural design of the active clamping assembly 42 and the driven clamping assembly 44 ensures that the grinding fixture 4 can timely adjust the clamping state of the casting 3 according to the correction result of the position correction assembly 45 .

[0071] In another embodiment, see Figure 3 The present grinding process further includes a driven rotating power component 47 .

[0072] like Figure 3 As shown, when the driven clamping assembly 44 clamps the right end of the casting 3, the driven rotating power assembly 47 and the driven clamping assembly 44 are disconnected, so that the driven clamping assembly 44 can rotate with the rotation of the casting 3.

[0073] like Figure 1 and Figure 3 As shown, when the driven clamping assembly 44 releases the right end of the casting 3, the driven rotating power assembly 47 is connected to the driven clamping assembly 44 to prevent the driven clamping assembly 44 from rotating at will and causing damage to the grinding equipment 2; at the same time, the driven rotating power assembly 47 can also adjust the position of the driven clamping assembly 44, which is more labor-saving than manual adjustment by the operator.

[0074] In another embodiment, see Figure 4 The position sensing component 46 includes a distance sensor 461 and a sensor bracket 462; the sensor bracket 462 is fixedly mounted on the base 41, and the distance sensor 461 is mounted on the sensor bracket 462; the distance sensor 461 is provided with a detection probe to detect the distance between it and the casting 3; the sensor bracket 462 ensures the fixed position of the distance sensor 461, thereby ensuring the accuracy of the detection result of the distance sensor 461.

[0075] In another embodiment, see Figure 1 and Figure 2 The positioning portion is a positioning hole 113 opened on the base 11, and the positioning hole 113 is coaxial with the base 11. The positioning portion adopts the design of the positioning hole 113 coaxial with the base 11, which not only simplifies the processing technology, but also is convenient when installing the brazing grinding wheel 1 on the grinding equipment 2.

[0076] In another embodiment, see Figure 2 The diameter of the substrate 11 is in the range of 30 mm ≤ D ≤ 300 mm; the width of the substrate 11 is in the range of 1 mm ≤ t ≤ 50 mm. The designer selects the specific size according to the castings 3 of different sizes and shapes to be polished. For example, Figure 5For the casting 3 shown, the dimensions of the brazing grinding wheel 1 can be designed as follows: the diameter of the base 11 is 180 mm, the width of the base 11 without the abrasive 12 attached is 15 mm, and the diameter of the positioning portion is 22.23 mm.

[0077] In another embodiment, see Figure 2 and Figure 5 The attachment range of the abrasive 12 starts from the outermost side of the grinding surface 111 of the substrate 11. The abrasive 12 can be attached to only the outermost circle of the grinding surface 111 of the substrate 11; or it can be attached from the outermost side of the grinding surface 111 of the substrate 11 to the positioning portion; or it can be attached from the outermost side of the grinding surface 111 of the substrate 11 to any point between the positioning portion and the grinding surface 111 of the substrate 11; the attachment range of the abrasive 12 starts from the outermost side of the grinding surface 111 of the substrate 11, compared with attaching from a certain position on the inner side of the brazing grinding wheel 1, so that the brazing grinding wheel 1 can grind the joint line 31 of the casting 3 faster.

[0078] In other embodiments, Figure 2 As shown, during the production of the brazing grinding wheel 1, a tool is used to wrap the circumferential top 112 of the substrate 11, and then the abrasive 12 is attached to the grinding surfaces 111 on both sides of the substrate 11 by a brazing process in one step; compared to the design of first attaching the abrasive 12 to the grinding surface 111 and the circumferential top 112 of the substrate 11 by a brazing process, and then removing the abrasive 12 on the circumferential top 112, the technical solution in this embodiment has higher processing efficiency, lower cost, and easier quality assurance.

[0079] See also Figures 1 to 6 A grinding method for a grinding device for a seam line of a casting based on the above-mentioned method comprises the following steps:

[0080] S1: The active clamping power unit 423 drives the first clamping unit 421 and the second clamping unit 422 to clamp the left end of the casting 3, and the opposite surfaces of the first clamping unit 421 and the second clamping unit 422 are in contact with the left end of the casting 3; the passive clamping power unit 443 drives the third clamping unit 441 and the fourth clamping unit 442 to clamp the right end of the casting 3, and the opposite surfaces of the third clamping unit 441 and the fourth clamping unit 442 are in contact with the right end of the casting 3;

[0081] S2: The correction power unit 453 drives the first correction unit 451 and the second correction unit 452 to approach each other, clamping the correction section 32 until the opposite surfaces of the first correction unit 451 and the second correction unit 452 are in contact with the correction section 32; this process is very fast and will not affect the normal production rhythm of the grinding fixture 4;

[0082] S3: When the first correction part 451 and the second correction part 452 complete the correction of the correction section 32, that is, the casting 3, the correction power part 453 drives the first correction part 451 and the second correction part 452 to move away from each other;

[0083] S4: The position sensing component 46 detects the distance between it and the casting 3 through the detection probe of the distance sensor 461; when the distance does not match the set value, the correction section 32, that is, the position of the casting 3, can be further corrected through the first correction part 451 and the second correction part 452; the casting 3 can also be repositioned according to actual conditions, such as large position misalignment, using lifting tools such as electric hoists; when the detected distance matches the set value, the grinding fixture 4 proceeds to the next step;

[0084] S5: The active rotating power assembly 43 drives the active clamping assembly 42 to rotate, and the grinding wheel 1 gradually enters between the two "cams" in the middle of the casting 3 while rotating, and grinds the seam line 31 thereon.

[0085] S6: The grinding device 2 drives the brazing grinding wheel 1 to move toward the casting 3, and drives the brazing grinding wheel 1 to rotate. As the joint line surfaces of the brazing grinding wheel 1 and the casting 3 contact and rotate with each other, the brazing grinding wheel 1 grinds the joint line 31 on the casting 3. Because there is no abrasive 12 on the circumferential top 112 of the base 11 of the brazing grinding wheel 1, the brazing grinding wheel 1 will not cause damage to the casting 3 like the grinding wheel in the prior art.

[0086] S7: After the seam line on the casting 3 is polished away, the brazing grinding wheel 1 is driven by the polishing device 2 to move away from the casting 3, the polishing fixture 4 stops driving the casting to rotate, the casting 3 with the seam line 31 polished away is removed, and a new casting 3 is installed on the polishing fixture 4.

[0087] In summary, the present invention avoids damage to the casting 3 by attaching the abrasive 12 to the grinding surfaces 111 on both sides of the substrate 11, and designing that there is no abrasive 12 on the circumferential top 112 of the substrate; and by matching the shapes of the opposing surfaces of the first correction part 451 and the second correction part 452 with the shape of the correction section 32, the correction power part 453 drives the first correction part 451 and the second correction part 452 to move closer to or away from each other, and the position sensing component 46 detects the distance to the casting 3, and then detects the corrected casting 3 in combination with the position sensing component 46. The design of the distance between the casting 3 and the casting 3 avoids the problem that the fine misalignment produced by the clamp in the prior art is difficult to observe when clamping, resulting in unreliable clamping, and then leading to unqualified production quality of the casting 3; and the step design of the grinding method of the grinding equipment for grinding the seam line of the casting based on the above-mentioned casting can not only avoid the damage of the brazing grinding wheel 1 to the casting 3, but also can timely adjust the fine misalignment of the casting 3 with a long axial length and a more complex shape when being clamped, and can detect the fine misalignment, thereby cutting off the grinding operation, and effectively improving the production quality of the casting 3. Therefore, the present invention effectively overcomes the shortcomings of the prior art and has a high industrial utilization value.

[0088] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A grinding device for the seam line of a casting, equipped with a brazing grinding wheel and a grinding fixture; The grinding fixture clamps the casting and drives the casting to rotate; The brazing grinding wheel is driven by the grinding device to move toward the casting and rotate on its own; The grinding wheel comprises a base and abrasives, and a positioning portion is provided on the base; The grinding fixture comprises a base, an active clamping assembly, a driven clamping assembly and an active rotating power assembly; The active clamping assembly and the driven clamping assembly are both rotatably mounted on the base and clamp the left end and the right end of the casting respectively; the active rotary power assembly drives the active clamping assembly to rotate; Features: The abrasive is attached to the grinding surfaces on both sides of the substrate, and there is no abrasive on the top of the circumference of the substrate; The grinding fixture also includes: A position correction component, wherein a correction section is selected in the middle of the casting, and the position correction component corrects the position of the correction section; The position correction assembly includes a correction power unit, a first correction unit, and a second correction unit; The first correction part and the second correction part are arranged opposite to each other, and the shapes of the opposite surfaces of the first correction part and the second correction part are adapted to the shape of the correction section; The correction power unit drives the first correction unit and the second correction unit to move closer to or farther from each other; Position sensing components detect the distance to the casting.

2. The grinding device for the seam line of a casting according to claim 1, characterized in that: The correction power unit is slidably mounted on the base, with a sliding direction along the axial direction of the casting, and drives the first correction unit and the second correction unit to slide synchronously.

3. The grinding device for the seam line of a casting according to claim 1, characterized in that: The correction power unit includes a first correction power member and a second correction power member; The first correction power member drives the first correction part to move up and down, and the second correction power member drives the second correction part to move up and down; The first correction power member and the second correction power member are both slidably mounted on the base, and the sliding directions of both are along the axial direction of the casting, and they respectively drive the first correction part and the second correction part to move synchronously.

4. The grinding device for the seam line of a casting according to claim 1, characterized in that: The active clamping assembly comprises an active clamping power unit, a first clamping unit and a second clamping unit; the first clamping unit and the second clamping unit are arranged opposite to each other, and the active clamping power unit drives the two to move closer to or away from each other; The shapes of the opposing surfaces of the first clamping portion and the second clamping portion match the shape of the left end of the casting; The driven clamping assembly comprises a driven clamping power unit, a third clamping unit and a fourth clamping unit; the third clamping unit and the fourth clamping unit are arranged opposite to each other, and the driven clamping power unit drives the third clamping unit and the fourth clamping unit to move closer to or farther from each other; The shapes of the facing surfaces of the third clamping portion and the fourth clamping portion match the shape of the right end of the casting.

5. The grinding device for the seam line of a casting according to claim 1, characterized in that: Also included is a driven rotating power assembly; When the driven clamping assembly clamps the right end of the casting, the driven rotating power assembly and the driven clamping assembly are disconnected; When the driven clamping assembly releases the right end of the casting, the driven rotating power assembly is connected to the driven clamping assembly.

6. The grinding device for the seam line of a casting according to claim 1, characterized in that: The position sensing component includes a distance sensor and a sensor bracket; The sensor bracket is fixedly mounted on the base, and the distance sensor is mounted on the sensor bracket; The distance sensor is provided with a detection probe for detecting the distance between the distance sensor and the casting.

7. The grinding device for the seam line of a casting according to claim 1, characterized in that: The positioning portion is a positioning hole opened on the base, and the positioning hole and the base are coaxial.

8. The grinding device for the seam line of a casting according to claim 1, characterized in that: The diameter of the substrate is in the range of 30 mm ≤ D ≤ 300 mm; The width of the substrate is in the range of 1 mm ≤ t ≤ 50 mm.

9. The grinding device for the seam line of a casting according to claim 1, characterized in that: The attachment range of the abrasive starts from the outermost side of the grinding surface of the substrate.

10. A method for grinding a seam line of a casting according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: the active clamping assembly clamps the left end of the casting, and the passive clamping assembly clamps the right end of the casting; S2: the correction power unit drives the first correction unit and the second correction unit to approach each other, clamping the correction section until the opposite surfaces of the first correction unit and the second correction unit are in contact with the correction section; S3: the correction power unit drives the first correction unit and the second correction unit to move away from each other; S4: The position sensing component detects the distance between it and the casting; when the distance does not match the set value, the position of the casting continues to be corrected; when the distance matches the set value, the fixture proceeds to the next step; S5: the active rotating power assembly drives the active clamping assembly to rotate; S6: The grinding device drives the brazing grinding wheel to move toward the casting, and drives the brazing grinding wheel to rotate. As the brazing grinding wheel and the joint line surface of the casting contact and rotate with each other, the brazing grinding wheel grinds the joint line on the casting; S7: After the seam line is eliminated by grinding, the brazing grinding wheel is driven by the grinding device to move away from the casting, and the grinding fixture stops driving the casting to rotate.

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