CN113798784A - Manufacturing method of machining part and machining part - Google Patents
Manufacturing method of machining part and machining part Download PDFInfo
- Publication number
- CN113798784A CN113798784A CN202010552418.9A CN202010552418A CN113798784A CN 113798784 A CN113798784 A CN 113798784A CN 202010552418 A CN202010552418 A CN 202010552418A CN 113798784 A CN113798784 A CN 113798784A
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- outer ring
- grinding
- machining
- raceway
- manufacturing
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- 238000003754 machining Methods 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 21
- 230000000171 quenching effect Effects 0.000 claims abstract description 21
- 238000005242 forging Methods 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007730 finishing process Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a machining part which is a slewing bearing and comprises an inner ring 1 and an outer ring 2 with circular sections, wherein a ball 4 is rotatably connected between the inner ring 1 and the outer ring 2; the hole wall of the inner ring 1 and the outer wall of the outer ring 2 are correspondingly provided with roller paths 11, and the balls 4 are in clearance fit in the roller paths 11; also disclosed is a method of manufacturing a machined part, comprising the steps of: s1 forging; s2 rough machining; s3, hardening and tempering; s4, fine machining; s5 quenching; and S6 grinding. Firstly, rough machining and finish machining surfaces are distinguished, so that a step difference is formed above and below a raceway 11, the requirement of a fit clearance of a ball 4 is met, and a margin is reserved for installation of the ball 4; secondly, grinding and quenching treatment are respectively carried out before and after finish machining and rough machining, so that the machining precision problem of the raceway 11 can be improved, the machining specialty can be reduced, workers can better work, and the problem that the surface strength of the raceway 11 is insufficient due to deepening of the grinding depth in clearance fit is avoided.
Description
Technical Field
The invention relates to the field of machining, in particular to a manufacturing method of a machined part and the machined part.
Background
The bearing capacity of the slewing bearing is the main basis for selecting the slewing bearing in the engineering machinery design. Four main parameters influencing the bearing capacity of the slewing bearing are raceway hardness, depth and uniformity of a quenching layer of the raceway, curvature radius of the raceway and a contact angle of the raceway. In addition to the raceway hardness parameter, three other parameters are associated with the machining of the raceway. The raceway processing of domestic slewing bearing manufacturing enterprises is mainly carried out on a common machine tool, and three basic problems exist: first, the processing efficiency is low. In order to meet the requirements of the shape of the roller path, profiling, forming cutters and the like are generally adopted for processing, the technical requirements on workers are high, the labor intensity is high, the processing time is long, and equipment and personal accidents happen occasionally. Secondly, the raceway center diameter is difficult to control. The size of the clearance of the slewing bearing is determined by the diameter of the center of the raceway and the diameter of the rolling body, and the clearance is one of key items for judging whether the slewing bearing is qualified or not. To meet the requirement of fit clearance, the following methods are generally adopted: the rolling body is replaced to meet the requirement of clearance fit, but the contact angle between the rolling body and the raceway is shifted; the grinding amount of the roller path is increased, and the depth of a hardening layer of the roller path is shallow. Thirdly, the existing raceway has low machining precision.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a manufacturing method of a machined part and the machined part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a machining part is a slewing bearing and comprises an inner ring and an outer ring with circular sections, and balls are rotatably connected between the inner ring and the outer ring; the hole wall of the inner ring and the outer wall of the outer ring are correspondingly provided with roller paths, and the balls are in clearance fit in the roller paths.
A method of manufacturing a machined part, comprising the steps of:
s1: forging; forging and pressing the blank to obtain a circular outer ring;
s2: rough machining; turning the outer wall of the outer ring obtained in the step S1 for multiple times to obtain a rough-machined outer ring, wherein the total feed of the turning for multiple times is set to be L1Then 4cm < L1≤6cm；
S3: quenching and tempering: quenching and tempering the rough outer ring obtained after the step S2;
s4: finish machining: turning the outer wall of the outer ring obtained in the step S3 for multiple times to obtain a finished outer ring, wherein the total feed of the turning for multiple times is set to be L2Then 0.1 cm. ltoreq.L2Less than 1cm, and the feed amount of single turning is set as L3Then L3Less than 0.3 cm;
s5: quenching; quenching the finish-machined outer ring obtained in the step S4 to obtain a quenched outer ring;
s6: grinding: grinding the outer ring in S5 to a grinding depth L4Then L4＜0.15cm。
Preferably, after the rough machining process of S3, the outer wall of the outer ring is once ground by a grinding roller, and the raceway is obtained by grinding.
Preferably, the diameter of the grinding roller adopted by the grinding roller path is R1The ball diameter of the ball is R2Then 0.05cm < | R1-R2|＜0.1cm。
Preferably, in the finishing process of S4, the finished machined surface is a portion of the outer ring outer surface located below the raceway.
Preferably, after the finish machining of S4, the roller path is subjected to secondary grinding to smooth the surface of the roller path, and the grinding depth is 0.01-0.02 cm.
Preferably, the grinding depth of one grinding is equal to the radius of the grinding roller, and the one grinding is performed in a plurality of times, and the number of times of feeding is set to n, so that each feeding is performed
The amount of the retracting is
Preferably, during the roughing process at S3, the rough machined surface is the entire outer surface of the outer ring.
The invention has the beneficial effects that: in the invention, firstly, rough machining and finish machining surfaces are distinguished, the rough machining turning surface is the outer surface of the whole outer ring, and finish machining is only carried out on the part below the raceway, so that the step difference is formed between the upper part and the lower part of the raceway, the requirement of the fit clearance of the balls is met, and the balls are mounted with margins; secondly, grinding and quenching treatment are respectively carried out before and after finish machining and rough machining, so that the problem of the machining precision of the raceway can be solved, the machining specialty can be reduced, workers can better work, and the problem of insufficient surface strength of the raceway caused by deepening of the grinding depth in clearance fit is solved; on the basis, the machining feed amount of rough machining and finish machining is limited, and the machining precision is further improved.
Drawings
FIG. 1 is a schematic structural view of a machined part according to the present invention;
FIG. 2 is a process flow diagram of the present invention for machining a part;
FIG. 3 is a schematic structural diagram of a raceway;
FIG. 4 is a schematic view of a machining rough machining process of a raceway;
fig. 5 is a process diagram of the cutting and finishing of the raceway.
Reference numbers in the figures: 1 inner ring, 11 raceways, 2 outer rings, 3 sealing rings and 4 balls.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a machined part is a slewing bearing and comprises an inner ring 1 and an outer ring 2 with circular cross sections, and balls 4 are connected between the inner ring 1 and the outer ring 2; the hole wall of the inner ring 1 and the outer wall of the outer ring 2 are correspondingly provided with roller paths 11, and the balls 4 are in clearance fit in the roller paths 11.
A method of manufacturing a machined part, comprising the steps of:
s1: forging; forging and pressing the blank to obtain an annular outer ring 2;
s2: rough machining; turning the outer wall of the outer ring 2 obtained in the step S1 for multiple times to obtain the outer ring 2 after rough machining, wherein the total feed of the turning for multiple times is set to be L1Then 4cm < L1≤6cm。
S3: quenching and tempering: quenching and tempering the rough outer ring 2 obtained after the step S2;
s4: finish machining: turning the outer ring 2 obtained in the step S3 for multiple times to obtain the finished outer ring 2, wherein the total feed of the turning for multiple times is set to be L2Then 0.1 cm. ltoreq.L2Less than 1cm, and the feed amount of single turning is set as L3Then L3Less than 0.3 cm;
s5: quenching; quenching the outer ring 2 after finish machining obtained in the step S4 to obtain a quenched outer ring 2;
s6: grinding: grinding the outer ring 2 in S5 to a grinding depth L4Then L4＜0.15cm。
A machining method of a machined part comprises the following steps:
s1: forging; forging and pressing the blank to obtain an annular outer ring 2;
s2: rough machining; turning the outer wall of the outer ring 2 obtained in the step S1 for multiple times to obtain the outer ring 2 after rough machining, wherein the total feed of the turning for multiple times is set to be L1Then 4cm < L1≤6cm。
S3: quenching and tempering: quenching and tempering the rough outer ring 2 obtained after the step S2;
s4: finish machining: turning the outer wall of the outer ring 2 obtained in the step S3 for multiple times to obtain the outer ring 2 after finish machining, wherein the total feed of the turning for multiple times is set to be L2Then 0.1 cm. ltoreq.L2Less than 1cm, and the feed amount of single turning is set as L3Then L3Less than 0.3 cm;
s5: quenching; quenching the outer ring 2 after finish machining obtained in the step S4 to obtain a quenched outer ring 2;
s6: grinding: grinding the outer ring 2 in S5 to a grinding depth L4Then L4＜0.15cm。
After the rough machining process of S3, the raceway 11 is ground by performing a primary grinding process on the outer wall of the outer ring 2 using a grinding roller.
The diameter of the grinding roller adopted by the grinding roller path 11 is R1The ball 4 has a spherical diameter R2Then 0.05cm < | R1-R2|＜0.1cm。
In the finish machining process of S4, the finish machined surface is a portion of the outer surface of the outer ring 2 below the raceway 11.
And after the finish machining of S4, performing secondary grinding on the raceway 11 to smooth the surface of the raceway 11, wherein the grinding depth is 0.01-0.02 cm.
The grinding depth of one-time grinding is equal to the radius of the grinding roller, and one-time grinding is carried out for multiple times, and the feeding times are set as n, so that each time of feeding
The amount of the retracting is
In the course of the roughing at S3, the rough machined surface is the entire outer surface of the outer ring 2.
The grinding process of the processing is improved again, firstly, the processing surfaces of rough processing and finish processing are distinguished, the rough processing turning surface is the outer surface of the whole outer ring 2, and the finish processing only processes the part below the raceway 11, so that the step difference is generated above and below the raceway 11, the requirement of the fit clearance of the ball 4 is met, and the installation of the ball 4 is provided with margin; secondly, grinding and quenching treatment are respectively carried out before and after finish machining and rough machining, so that the problem of the machining precision of the raceway 11 can be solved, the machining specialty can be reduced, workers can better feel better, and the insufficient surface strength of the raceway 11 caused by deepening of the grinding depth in clearance fit is avoided; on the basis, the machining feed amount of rough machining and finish machining is limited, and the machining precision is further improved.
The invention is an improvement on the prior art, can better solve the problem that the surface precision and the strength of the raceway 11 are not enough due to the existing clearance fit, and adopts the conventional prior art except the above parts.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A machining part is a slewing bearing and is characterized by comprising an inner ring (1) and an outer ring (2) with circular cross sections, wherein balls (4) are rotatably connected between the inner ring (1) and the outer ring (2); the hole wall of the inner ring (1) and the outer wall of the outer ring (2) are correspondingly provided with roller paths (11), and the balls (4) are in clearance fit in the roller paths (11).
2. A method of manufacturing a machined part according to claim 1, comprising the steps of:
s1: forging; forging and pressing the blank to obtain a circular outer ring (2);
s2: rough machining; turning the outer wall of the outer ring (2) obtained in the step S1 for multiple times to obtain the outer ring (2) after rough machining, and setting the total feed of the turning for multiple times as L1Then 4cm < L1≤6cm；
S3: quenching and tempering: quenching and tempering the rough outer ring (2) obtained after S2;
s4: finish machining: turning the outer wall of the outer ring (2) obtained in the step S3 for multiple times to obtain the outer ring (2) after finish machining, and setting the total feed of the turning for multiple times as L2Then 0.1 cm. ltoreq.L2Less than 1cm, and the feed amount of single turning is set as L3Then L3Less than 0.3 cm;
s5: quenching; quenching the finished outer ring (2) obtained in S4 to obtain a quenched outer ring (2);
s6: grinding: grinding the outer ring (2) in S5 to a grinding depth L4Then L4＜0.15cm。
3. A method of manufacturing a machined part according to claim 2, characterized in that after the roughing process of S3, the raceway (11) is ground by a grinding roll on the outer wall of the outer ring (2).
4. A method of manufacturing a machined part according to claim 2, characterized in that the grinding roll diameter R used for the grinding track (11) is set to1The ball diameter of the ball (4) is R2Then 0.05cm < | R1-R2|＜0.1cm。
5. A manufacturing method of a machined part according to claim 3, characterized in that, in the finishing process of S4, the finished machined surface is a portion of the outer surface of the outer ring (2) located below the raceway (11).
6. The method of claim 3, wherein after the finish machining at S4, the raceway (11) is ground twice to smooth the surface of the raceway (11) and a grinding depth is 0.01 to 0.02 cm.
7. A method of manufacturing a machined part according to claim 3, wherein the grinding depth of one grinding is equal to the radius of the grinding roller, and the one grinding is performed a plurality of times, and the number of times of feed is set to n, so that each feed is performed
The amount of the retracting is
8. A method of manufacturing a machined part according to claim 2, characterized in that during the roughing of S3, the roughing machined surface is the entire outer surface of the outer ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010552418.9A CN113798784A (en) | 2020-06-17 | 2020-06-17 | Manufacturing method of machining part and machining part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010552418.9A CN113798784A (en) | 2020-06-17 | 2020-06-17 | Manufacturing method of machining part and machining part |
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| Publication Number | Publication Date |
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| CN113798784A true CN113798784A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010552418.9A Pending CN113798784A (en) | 2020-06-17 | 2020-06-17 | Manufacturing method of machining part and machining part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213631A (en) * | 2022-01-18 | 2022-10-21 | 江苏万达特种轴承股份有限公司 | Manufacturing method of light alloy turntable bearing in automatic material conveying mechanism |
| CN116447234A (en) * | 2023-04-19 | 2023-07-18 | 浙江恒嘉轴承有限公司 | Bearing forging and forging method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555907A (en) * | 2009-05-22 | 2009-10-14 | 马鞍山精一工程机械有限公司 | Ball-type slewing bearing with asymmetric raceway and processing method thereof |
| CN102865304A (en) * | 2012-09-05 | 2013-01-09 | 马鞍山统力回转支承有限公司 | Ball type rotary support of composite raceway and machining method of ball type rotary support |
| CN104057266A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Slewing bearing quenching type inner gear ring processing technology |
| CN104057250A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Processing technology for guaranteeing assembling interchangeability of inner and outer rings of revolving support |
| CN104353976A (en) * | 2014-10-29 | 2015-02-18 | 江阴尚爵回转驱动制造有限公司 | Slewing bearing machining and heat treatment process |
| CN106425337A (en) * | 2016-12-28 | 2017-02-22 | 贵州虹轴轴承有限公司 | Bearing machining process |
-
2020
- 2020-06-17 CN CN202010552418.9A patent/CN113798784A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555907A (en) * | 2009-05-22 | 2009-10-14 | 马鞍山精一工程机械有限公司 | Ball-type slewing bearing with asymmetric raceway and processing method thereof |
| CN102865304A (en) * | 2012-09-05 | 2013-01-09 | 马鞍山统力回转支承有限公司 | Ball type rotary support of composite raceway and machining method of ball type rotary support |
| CN104057266A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Slewing bearing quenching type inner gear ring processing technology |
| CN104057250A (en) * | 2014-06-04 | 2014-09-24 | 安徽省宁国顺昌机械有限公司 | Processing technology for guaranteeing assembling interchangeability of inner and outer rings of revolving support |
| CN104353976A (en) * | 2014-10-29 | 2015-02-18 | 江阴尚爵回转驱动制造有限公司 | Slewing bearing machining and heat treatment process |
| CN106425337A (en) * | 2016-12-28 | 2017-02-22 | 贵州虹轴轴承有限公司 | Bearing machining process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115213631A (en) * | 2022-01-18 | 2022-10-21 | 江苏万达特种轴承股份有限公司 | Manufacturing method of light alloy turntable bearing in automatic material conveying mechanism |
| CN115213631B (en) * | 2022-01-18 | 2023-08-04 | 江苏万达特种轴承股份有限公司 | Manufacturing method of light alloy turntable bearing in automatic material conveying mechanism |
| CN116447234A (en) * | 2023-04-19 | 2023-07-18 | 浙江恒嘉轴承有限公司 | Bearing forging and forging method |
| CN116447234B (en) * | 2023-04-19 | 2023-11-17 | 浙江恒嘉轴承有限公司 | Bearing forging and forging method |
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Application publication date: 20211217 |