CN216608661U - Double-abrasive grinding wheel - Google Patents
Double-abrasive grinding wheel Download PDFInfo
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- CN216608661U CN216608661U CN202122978879.5U CN202122978879U CN216608661U CN 216608661 U CN216608661 U CN 216608661U CN 202122978879 U CN202122978879 U CN 202122978879U CN 216608661 U CN216608661 U CN 216608661U
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Abstract
The utility model discloses a double-abrasive grinding wheel which comprises a first grinding wheel and a second grinding wheel, wherein the central shaft of the first grinding wheel is coaxial with the central shaft of the second grinding wheel, the first grinding wheel comprises a first end surface and a first outer circular surface, the second grinding wheel comprises a second end surface and a second outer circular surface, the first end surface, the first outer circular surface, the second end surface and the second outer circular surface are sequentially connected, an acute angle alpha is formed between a projection line of the second outer circular surface and a reference line on a plane passing through the central shaft of the double-abrasive grinding wheel, the reference line is a straight line parallel to the projection line of the first outer circular surface, and an obtuse angle beta is formed between the projection line of the second end surface and the projection line of the first outer circular surface.
Description
Technical Field
The utility model relates to the field of grinding processing, in particular to a double-abrasive grinding wheel.
Background
The traditional double-abrasive grinding wheel is formed by combining two plane grinding wheels with different formulas (as shown in figure 1), and comprises a first grinding wheel 1 and a second grinding wheel 2, wherein the first grinding wheel 1 is a coarse grinding wheel, the second grinding wheel 2 is a fine grinding wheel, and the two grinding wheels have different particle sizes (coarse grinding of the coarse particle size improves the grinding efficiency, fine grinding of the fine particle size improves the grinding precision), so that the coarse and fine machining is carried out in one-time clamping of a part. However, since the two abrasive machining planes of the first grinding wheel 1 and the second grinding wheel 2 are on the same plane, only a part (as shown in fig. 2) with a machining surface without steps or end surface interference can be machined, the application range is narrow, the practical popularization effect is poor, and if the machining surface has steps or end surface interference (as shown in fig. 3), the machining requirement cannot be met.
In order to avoid the influence of end surface interference during part machining, a stepped grinding wheel (as shown in fig. 4) exists in the prior art, and machining surfaces of the first grinding wheel 1 and the second grinding wheel 2 on the outer circular surface of the part are not on the same plane, so that the following technical problems exist:
1. during machining, only the outer circular surfaces of the first grinding wheel 1 and the second grinding wheel 2 have a grinding function, only the outer circular surface of the part is machined, and the end surface of the part cannot be machined simultaneously, so that the part needs to be trimmed twice.
2. The interference resistance of the stepped grinding wheel is poor, and the same excircle can be machined only when the two grinding wheels do not interfere with each other in the width direction in a machining working space.
3. The processing cooling effect is poor, and when second emery wheel 2 adds man-hour, the coolant liquid is blockked by first emery wheel 1, hardly enters into 2 processing range of second emery wheel, receives right angle grinding processing principle to influence simultaneously, and the contact surface is the arc, and the cooling is cut the difficulty with arranging, and processing is very easily burnt or crackle part terminal surface and fillet.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a double-abrasive grinding wheel with high processing stability.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a double-abrasive grinding wheel, includes first emery wheel and second emery wheel, the center pin of first emery wheel and the center pin of second emery wheel are coaxial, first emery wheel includes first terminal surface and first excircle face, the second emery wheel includes second terminal surface and second excircle face, first terminal surface, first excircle face, second terminal surface, second excircle face connect gradually, on the plane of crossing the center pin of double-abrasive grinding wheel, have acute angle alpha between the projection line of second excircle face and the reference line, the reference line is the straight line parallel with the projection line of first excircle face, have obtuse angle beta between the projection line of second terminal surface and the projection line of first excircle face.
As a further improvement of the above technical solution:
20°≤α≤60°。
β＝α+90°。
preferably, a first arc surface is arranged between the first end surface and the first outer circular surface.
Preferably, a second arc surface is arranged between the second end surface and the second outer arc surface.
Preferably, a first right-angle surface is arranged between the first end surface and the first outer circular surface.
Preferably, a second right-angle surface is arranged between the second end surface and the second outer circular surface.
The length value of the second end surface is larger than the height value of the end surface of the part.
The first grinding wheel further comprises a concave table surface and an end surface rear angle, the concave table surface is parallel to the first end surface, and the end surface rear angle is connected between the concave table surface and the first end surface.
The abrasive grain size of the first grinding wheel is larger than that of the second grinding wheel.
Preferably, in further embodiments, the grit size of the second grinding wheel is greater than the grit size of the first grinding wheel.
Compared with the prior art, the utility model has the advantages that:
the utility model is provided with a first grinding wheel and a second grinding wheel, wherein the first end surface and the first excircle surface of the first grinding wheel respectively perform grinding rough machining on the end surface of the part and the excircle surface of the part, the second end surface and the second excircle surface of the second grinding wheel respectively perform grinding finish machining on the end surface of the part and the excircle surface of the part, and the part with step end surface interference can be subjected to primary machining and secondary machining (rough machining and finish machining) by adopting one-time clamping, so that the machining stability is high. The existence of the acute angle alpha and the obtuse angle beta improves the interference resistance between the first grinding wheel and the second grinding wheel, the interference resistance is enhanced along with the increase of the angle alpha, and on the other hand, when the second grinding wheel is machined, the first grinding wheel cannot prevent cooling liquid from entering a machining area of the second grinding wheel.
Drawings
Fig. 1 is a schematic structural view of a conventional grinding wheel.
FIG. 2 is a schematic view showing that the end face of a conventional grinding wheel is not interfered during machining.
FIG. 3 is a schematic diagram showing the interference of end faces in conventional grinding wheel machining.
Fig. 4 is a schematic view of another conventional grinding wheel machining.
Fig. 5 is a schematic structural diagram of the present invention.
Fig. 6 is a partially enlarged view of a portion a in fig. 5.
FIG. 7 is a schematic view of the structure of the machined part of the present invention.
FIG. 8 is a schematic view of the first grinding wheel of the present invention during machining.
FIG. 9 is a schematic view of the second grinding wheel of the present invention during machining.
The reference numerals in the figures denote: 1. a first grinding wheel; 11. a concave mesa; 12. end face relief angle; 13. a first end face; 14. a first outer circular surface; 2. a second grinding wheel; 21. a second end face; 22. a second outer circular surface.
Detailed Description
The utility model will be described in further detail below with reference to the drawings and specific examples. Unless otherwise specified, the instruments or materials employed in the present invention are commercially available.
Example 1:
as shown in fig. 5 and 6, the double-abrasive grinding wheel of the present embodiment includes a first grinding wheel 1 and a second grinding wheel 2, a central axis of the first grinding wheel 1 is coaxial with a central axis of the second grinding wheel 2, the first grinding wheel 1 includes a first end surface 13 and a first outer circular surface 14, the second grinding wheel 2 includes a second end surface 21 and a second outer circular surface 22, the first end surface 13, the first outer circular surface 14, the second end surface 21, and the second outer circular surface 22 are sequentially connected, on a plane passing through the central axis of the double-abrasive grinding wheel, an acute angle α is formed between a projection line of the second outer circular surface 22 and a reference line, the reference line is a straight line parallel to the projection line of the first outer circular surface 14, and an obtuse angle β is formed between the projection line of the second end surface 21 and the projection line of the first outer circular surface 14.
The double-abrasive grinding wheel has four processing surfaces, two end surfaces (a first end surface 13 and a second end surface 21) and two outer circles (a first outer circle surface 14 and a second outer circle surface 22), and has the advantages of a right-angle grinding wheel and an inclined surface grinding wheel. When the first grinding wheel 1 grinds materials, the central axis of the first grinding wheel 1 is parallel to the central axis of the part, and the second grinding wheel 2 avoids steps or end faces and does not interfere with the grinding processing of the first grinding wheel 1; when the second grinding wheel 2 is used for grinding materials, the central shaft of the second grinding wheel 2 has a deflection angle relative to the central shaft of the part, the first grinding wheel 1 avoids a step or an end face, the grinding materials machining of the second grinding wheel 2 is not interfered, meanwhile, the step end face of the part and the outer circular face of the part are both machined by the first grinding wheel 1 and the second grinding wheel 2 simultaneously, the part machining of the high-precision step end face is realized, the part with the step end face interference is clamped once, and the first machining and the second machining (rough machining and finish machining) of the part can be completed. The existence of the acute angle alpha and the obtuse angle beta improves the interference resistance between the first grinding wheel 1 and the second grinding wheel 2, the interference resistance is enhanced along with the increase of the angle alpha, and on the other hand, when the second grinding wheel 2 is machined, the first grinding wheel 1 cannot prevent the cooling liquid from entering a machining area of the second grinding wheel 2.
Different from the traditional abrasive grinding wheel processing, the utility model breaks the bottleneck that the excircle of the high-precision bearing track needs to be processed by two procedures of rough grinding and fine grinding, can process a large-allowance workpiece once, avoids the defects of 'black skin caused by no grinding' and secondary repair of a central hole, and improves the processing efficiency and quality.
Alpha is more than or equal to 20 degrees and less than or equal to 60 degrees, and alpha is determined according to the actual requirements of part processing. In this embodiment, α is 30 ° and α is the same as the rotation angle at which the second grinding wheel 2 is machined.
In the present embodiment, β ═ α +90 °.
In this embodiment, a first arc surface (not shown) is disposed between the first end surface 13 and the first outer circular surface 14. A second arc surface (not shown) is arranged between the second end surface 21 and the second outer arc surface 22.
In other embodiments, a first right-angle surface is disposed between the first end surface 13 and the first outer circular surface 14. A second right-angle surface is arranged between the second end surface 21 and the second outer circular surface 22. The first arc surface or the first right-angle surface is determined according to the requirement of the part.
In this embodiment, the length of the second end surface 21 is greater than the height of the end surface of the component.
In this embodiment, the length of the first outer circular surface 14 is greater than the length of the outer circular surface of the component. The length value of the first outer circular surface 14 is adjusted according to the length value of the outer circular surface of the part, so that the machining width of the first grinding wheel 1 is adjusted, the machining width of the second grinding wheel 2 is adjusted by adjusting the length value of the second outer circular surface 22, and the utilization rate of the grinding wheels is effectively improved.
In this embodiment, the first grinding wheel 1 further includes a recessed table 11 and an end surface relief angle 12, the recessed table 11 is parallel to the first end surface 13, the end surface relief angle 12 is connected between the recessed table 11 and the first end surface 13, and the end surface relief angle 12 is inclined with respect to the first end surface 13. When the first grinding wheel 1 is machined, the first end face 13 is in contact with the end face of a part, cooling liquid flows into the first end face 13 from the concave table 11, the concave table 11 ensures that the cooling liquid fully enters a machining and grinding area, and full cooling and chip removal are guaranteed. The end surface back angle 12 is obliquely arranged relative to the first end surface 13, so that the grinding sand grains at the first end surface 13 are not easy to collapse, the cooling liquid is guided to flow into the first end surface 13, and the strength of the first end surface 13 is enhanced.
The grit size of the first grinding wheel 1 is different from the grit size of the second grinding wheel 2. In this embodiment, the abrasive grain size of the first grinding wheel 1 is larger than that of the second grinding wheel 2. In other embodiments, the abrasive particle size of the second grinding wheel 2 is larger than that of the first grinding wheel 1, and the same or similar technical effects can be achieved, where the processing sequence is changed from processing by the first grinding wheel 1 and then processing by the second grinding wheel 2 to processing by the second grinding wheel 2 and then processing by the first grinding wheel 1. In special cases, the grit size of the first grinding wheel 1 is the same as the grit size of the second grinding wheel 2.
In this embodiment, the first grinding wheel 1 and the second grinding wheel 2 are integrally formed by a bonding process. In other embodiments, the first wheel 1 and the second wheel 2 are joined using a sintering process.
As shown in figure 7, the allowance of the pressing plate part on the inner side of a gunship helicopter is 1.2mm, the excircle has end surface interference, and the requirement that the surface wear resistance value is greater than 90% is met. Through processing tests, if the technical requirements are met, the grinding material with fine granularity is required to be used, the feeding speed is 0.03mm per minute, and the grinding time is 45 minutes. After the double-abrasive grinding wheel is adopted, rough machining and finish machining are realized at one time, the technical requirements are ensured, and the machining time is 7 minutes.
As shown in fig. 8, in this embodiment, the central axis of the double-abrasive grinding wheel is parallel to the axis of the part, the end face (a face) of the part and the outer circumferential face (B face) of the part are machined, the first grinding wheel 1 (diamond grinding wheel) with the granularity of 80 and the concentration of 100 is used for rough machining, the feed rate is 0.3mm per minute, a fine grinding allowance of 0.05mm is left, and the machining time is 4 minutes.
As shown in fig. 9, in the present embodiment, in the finish grinding, the center axis of the second grinding wheel 2 is rotated by 30 degrees, and the end face (a face) of the part and the outer circumferential face (B face) of the part are processed in a state where the center axis of the second grinding wheel 2 forms an angle of 30 degrees with the axis of the part, so that the finish grinding time is shortened to 3 minutes.
According to the utility model, a first grinding wheel 1 and a second grinding wheel 2 are used together to process a large-allowance precise workpiece with a step arc excircle on the basis of the same grinding wheel spindle, wherein the first grinding wheel 1 (rough grinding wheel) in the double-grinding-material grinding wheel is used for performing rough machining rapidly, and then the second grinding wheel 2 (fine grinding wheel) is used for ensuring the precision of the workpiece. When the first grinding wheel 1 works, the first end surface 11 is in surface contact with the end surface of the part, and when the second grinding wheel 2 works, the second end surface 21 is in line contact with the end surface of the part, and the perpendicularity of the end surface to the surface of the part is only influenced by finishing precision and is not influenced by adjustment errors of a headstock and a tailstock of a machine tool.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the utility model, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. A double abrasive grinding wheel comprising a first grinding wheel (1) and a second grinding wheel (2), the central axis of the first grinding wheel (1) and the central axis of the second grinding wheel (2) being coaxial, the first grinding wheel (1) comprising a first end face (13) and a first outer circular face (14), the second grinding wheel (2) comprising a second end face (21) and a second outer circular face (22), characterized in that: the first end face (13), the first outer circular face (14), the second end face (21) and the second outer circular face (22) are sequentially connected, on a plane passing through a central shaft of the double-abrasive grinding wheel, an acute angle alpha is formed between a projection line of the second outer circular face (22) and a reference line, the reference line is a straight line parallel to the projection line of the first outer circular face (14), and an obtuse angle beta is formed between the projection line of the second end face (21) and the projection line of the first outer circular face (14).
2. The dual abrasive grinding wheel of claim 1, wherein: alpha is more than or equal to 20 degrees and less than or equal to 60 degrees.
3. The dual abrasive grinding wheel of claim 2, wherein: β +90 °.
4. The dual abrasive grinding wheel according to any one of claims 1 to 3, characterized in that: a first arc surface is arranged between the first end surface (13) and the first outer circular surface (14).
5. The dual abrasive grinding wheel of claim 4, wherein: and a second arc surface is arranged between the second end surface (21) and the second outer circular surface (22).
6. The dual abrasive grinding wheel according to any one of claims 1 to 3, characterized in that: a first right-angle surface is arranged between the first end surface (13) and the first outer circular surface (14).
7. The dual abrasive grinding wheel of claim 6, wherein: a second right-angle surface is arranged between the second end surface (21) and the second outer circular surface (22).
8. The dual abrasive grinding wheel according to any one of claims 1 to 3, characterized in that: the length value of the second end surface (21) is larger than the height value of the end surface of the part.
9. The dual abrasive grinding wheel according to any one of claims 1 to 3, characterized in that: the first grinding wheel (1) further comprises a concave table surface (11) and an end surface rear angle (12), the concave table surface (11) is parallel to the first end surface (13), and the end surface rear angle (12) is connected between the concave table surface (11) and the first end surface (13).
10. The dual abrasive grinding wheel according to any one of claims 1 to 3, characterized in that: the abrasive grain size of the first grinding wheel (1) is larger than that of the second grinding wheel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978879.5U CN216608661U (en) | 2021-11-30 | 2021-11-30 | Double-abrasive grinding wheel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122978879.5U CN216608661U (en) | 2021-11-30 | 2021-11-30 | Double-abrasive grinding wheel |
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| Publication Number | Publication Date |
|---|---|
| CN216608661U true CN216608661U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122978879.5U Active CN216608661U (en) | 2021-11-30 | 2021-11-30 | Double-abrasive grinding wheel |
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|---|---|
| CN (1) | CN216608661U (en) |
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2021
- 2021-11-30 CN CN202122978879.5U patent/CN216608661U/en active Active
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