阅读说明：本技术 一种轴承外圈加工工艺 (Bearing outer ring machining process ) 是由 江松 王扶磊 王清旺 刘殿兵 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种轴承外圈加工工艺,包括以下步骤：步骤一,双锻；步骤二,退火；步骤三,双车；步骤四,双淬回火；步骤五,磨床加工；步骤六,分圈；步骤七,车削加工；步骤八,附加回火；步骤九,测量检验；其中在上述步骤一中,选取轴承钢为原料,然后将轴承钢放置在加热炉中进行一次加热处理,当加热完成后对轴承钢进行剪切成单个料段,该发明,改变了传统中对单个轴承外圈的生产工艺,对组合在一起的轴承外圈进行加工生产,有利于料段的在进行锻造的过程中受力集中,避免了在锻造的过程中由于受力不均匀导致料段的变形,有利于节约材料,同时利用磨床消除产品的椭圆和翘曲,降低了产品的损坏率,避免了二次加工生产降低了工作效率。(The invention discloses a bearing outer ring processing technology, which comprises the following steps: step one, double forging; step two, annealing; step three, double-vehicle operation; step four, double quenching and tempering; step five, processing by a grinding machine; step six, dividing circles; step seven, turning; step eight, additional tempering; step nine, measurement and inspection; in the first step, bearing steel is selected as a raw material, then the bearing steel is placed in a heating furnace for primary heating treatment, and the bearing steel is cut into single material sections after heating is completed.)

1. A bearing outer ring machining process comprises the following steps: step one, double forging; step two, annealing; step three, double-vehicle operation; step four, double quenching and tempering; step five, processing by a grinding machine; step six, dividing circles; step seven, turning; step eight, additional tempering; step nine, measurement and inspection; the method is characterized in that:

selecting bearing steel as a raw material, placing the bearing steel in a heating furnace for primary heating treatment, shearing the bearing steel into single material sections after heating is finished, wherein the size of each single material section is twice of that of a traditional cut material section, placing the material sections in the heating furnace for secondary heating, then preserving heat at 1020-;

in the second step, the molding material obtained in the first step is placed in a heating furnace for heating, then is cooled to 500-550 ℃ at a cooling rate of 20-30 ℃, and then is taken out of the furnace for air cooling to normal temperature;

in the third step, the outer diameter of the molding material processed in the second step is clamped by a floating clamping jaw, the end face, the outer diameter, the chamfer and the raceway of a product are roughly lathed by a numerical control lathe, then the outer diameter, the end face, the chamfer and the raceway are roughly lathed by the floating clamping jaw to obtain a workpiece, and the workpiece is subjected to machining amount of 0.40 mm;

in the fourth step, the workpiece treated in the third step is placed in a heating furnace for primary heating, then the heated workpiece is put into No. 10 engine oil with the temperature of 120-150 ℃ for cooling for 2-4min, then the heated workpiece is put into No. 10 engine oil with the temperature of 30-50 ℃ for cooling, then the cooled workpiece is placed in the heating furnace for secondary heating, and then the workpiece is taken out for natural cooling;

in the fifth step, the workpiece treated in the fourth step can be removed by a grinding machine to eliminate the ellipse and the warpage, and the workpiece has a machining amount of 0.30 mm;

in the sixth step, the workpiece processed in the fifth step is subjected to radial cutting by using a numerical control machine tool from the center of the workpiece, and the workpiece is divided into two parts to obtain a formed workpiece;

in the seventh step, the end face or the outer diameter of the formed workpiece obtained in the sixth step is used as a clamping face of the numerical control machine tool, the residual machining amount of the product is turned by using a spring grinding sheet clamping tool to manufacture the required bearing outer ring, and the turning tool is a CBN tool;

in the eighth step, the bearing outer ring prepared in the seventh step is placed in a heating furnace for heating and then taken out for cooling at normal temperature;

in the ninth step, the size of the bearing outer ring processed in the ninth step is measured by using a bearing measuring instrument, and then the bearing outer ring is inspected.

2. The bearing outer ring machining process according to claim 1, characterized in that: in the first step, the primary heating temperature is 600-610 ℃.

3. The bearing outer ring machining process according to claim 1, characterized in that: in the first step, the temperature of the secondary heating is 1000-1100 ℃, and the heating time is 210-240 min.

4. The bearing outer ring machining process according to claim 1, characterized in that: in the second step, the heating temperature is 900-.

5. The bearing outer ring machining process according to claim 1, characterized in that: in the fourth step, the primary heating temperature is 800-.

6. The bearing outer ring machining process according to claim 1, characterized in that: in the fourth step, the secondary heating temperature is 140 ℃ and 180 ℃, and the heat preservation time is 2-4 h.

7. The bearing outer ring machining process according to claim 1, characterized in that: and in the sixth step, the numerical control machine tool uses a CBN cutting-off tool, and the cutting-off tool is a soft turning cutting-off tool as a welding base.

8. The bearing outer ring machining process according to claim 1, characterized in that: in the step eight, the heating temperature is 120-160 ℃, and the heat preservation time is 2-4 h.

Technical Field

The invention relates to the technical field of bearing outer ring processing, in particular to a bearing outer ring processing technology.

Background

The bearing is an important part in the modern mechanical equipment. Its main function is to support the mechanical rotator, reduce the coefficient of friction in its motion process, and guarantee its gyration precision, the bearing generally comprises inner circle, outer lane, rolling element and holder, wherein at the in-process of preparation outer lane, carry out single manufacturing production to the outer lane usually, the product is anti extrudeed highly short, the press atress is great, easily lead to the deformation, extravagant material, and adopt digit control machine tool to process the mill terminal surface and the external diameter of product at the in-process of outer lane processing usually, this mode is unfavorable for getting rid of the product itself because of the ellipse that forms after quenching and parallel poor, easily lead to the damage of work piece simultaneously, consequently need carry out secondary operation production to the work of damaging, and the work efficiency is reduced.

Disclosure of Invention

The invention aims to provide a bearing outer ring processing technology to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a bearing outer ring machining process comprises the following steps: step one, double forging; step two, annealing; step three, double-vehicle operation; step four, double quenching and tempering; step five, processing by a grinding machine; step six, dividing circles; step seven, turning; step eight, additional tempering; step nine, measurement and inspection;

selecting bearing steel as a raw material, placing the bearing steel in a heating furnace for primary heating treatment, shearing the bearing steel into single material sections after heating is finished, wherein the size of each single material section is twice of that of a traditional cut material section, placing the material sections in the heating furnace for secondary heating, then preserving heat at 1020-;

in the second step, the molding material obtained in the first step is placed in a heating furnace for heating, then is cooled to 500-550 ℃ at a cooling rate of 20-30 ℃, and then is taken out of the furnace for air cooling to normal temperature;

in the third step, the outer diameter of the molding material processed in the second step is clamped by a floating clamping jaw, the end face, the outer diameter, the chamfer and the raceway of a product are roughly lathed by a numerical control lathe, then the outer diameter, the end face, the chamfer and the raceway are roughly lathed by the floating clamping jaw to obtain a workpiece, and the workpiece is subjected to machining amount of 0.40 mm;

in the fourth step, the workpiece treated in the third step is placed in a heating furnace for primary heating, then the heated workpiece is put into No. 10 engine oil with the temperature of 120-150 ℃ for cooling for 2-4min, then the heated workpiece is put into No. 10 engine oil with the temperature of 30-50 ℃ for cooling, then the cooled workpiece is placed in the heating furnace for secondary heating, and then the workpiece is taken out for natural cooling;

in the fifth step, the workpiece treated in the fourth step can be removed by a grinding machine to eliminate the ellipse and the warpage, and the workpiece has a machining amount of 0.30 mm;

in the sixth step, the workpiece processed in the fifth step is subjected to radial cutting by using a numerical control machine tool from the center of the workpiece, and the workpiece is divided into two parts to obtain a formed workpiece;

in the seventh step, the end face or the outer diameter of the formed workpiece obtained in the sixth step is used as a clamping face of the numerical control machine tool, the residual machining amount of the product is turned by using a spring grinding sheet clamping tool to manufacture the required bearing outer ring, and the turning tool is a CBN tool;

in the eighth step, the bearing outer ring prepared in the seventh step is placed in a heating furnace for heating, and then taken out for cooling at normal temperature;

in the ninth step, the size of the bearing outer ring processed in the ninth step is measured by using a bearing measuring instrument, and then the bearing outer ring is inspected.

According to the above technical scheme, in the first step, the primary heating temperature is 600-.

According to the above technical scheme, in the first step, the temperature of the secondary heating is 1000-.

According to the technical scheme, in the second step, the heating temperature is 900-.

According to the technical scheme, in the fourth step, the primary heating temperature is 800-.

According to the technical scheme, in the fourth step, the secondary heating temperature is 140-.

According to the technical scheme, in the sixth step, the numerical control machine tool uses a CBN cutting-off tool, and the cutting-off tool is a soft turning cutting-off tool as a welding base.

According to the technical scheme, in the eighth step, the heating temperature is 120-160 ℃, and the heat preservation time is 2-4 h.

Compared with the prior art, the invention has the following beneficial effects: this bearing inner race processing technology, once the production technology to single bearing inner race in having changed the tradition, avoided forging because the atress is uneven leads to the deformation of material section to single material section, through carrying out the processing production to the bearing inner race that combines together, be favorable to the material section to concentrate at the in-process atress that carries out the forging, be favorable to material saving, utilize the grinding machine to eliminate the ellipse and the warpage of product simultaneously, the damage of ellipse and the poor product that leads to of parallelism that has avoided using the digit control machine tool to eliminate the product to form after quenching in the tradition, thereby avoided secondary operation production to reduce work efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a process flow diagram of the present invention.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a bearing outer ring machining process comprises the following steps: step one, double forging; step two, annealing; step three, double-vehicle operation; step four, double quenching and tempering; step five, processing by a grinding machine; step six, dividing circles; step seven, turning; step eight, additional tempering; step nine, measurement and inspection;

wherein in the first step, bearing steel is selected as a raw material, then the bearing steel is placed in a heating furnace for primary heating treatment at the temperature of 600-, after the heating is finished, the bearing steel is cut into single sections, the size of each single section is twice that of the traditional cut section, then the material section is placed in a heating furnace for secondary heating, the temperature of the secondary heating is 1000-1100 ℃, the heating time is 210-240min, then preserving heat for 90-120min at 1020-1050 ℃, then placing the material section after heat preservation on a press machine for repeated forging, then placing the material section after forging in a forming die, forming a blank under the action of the press machine, then placing the blank in a heating furnace for heating for three times, wherein the temperature of the heating for three times is 580-600 ℃, and then punching the heated blank in the central position of the blank by a press machine to obtain a molding material;

in the second step, the molding material obtained in the first step is placed in a heating furnace for heating, the heating temperature is 900-;

in the third step, the outer diameter of the molding material processed in the second step is clamped by a floating clamping jaw, the end face, the outer diameter, the chamfer and the raceway of a product are roughly lathed by a numerical control lathe, then the outer diameter, the end face, the chamfer and the raceway are roughly lathed by the floating clamping jaw to obtain a workpiece, and the workpiece is subjected to machining amount of 0.40 mm;

in the fourth step, the workpiece treated in the third step is placed in a heating furnace for primary heating at the temperature of 800-;

in the fifth step, the workpiece treated in the fourth step can be removed by a grinding machine to eliminate the ellipse and the warpage, and the workpiece has a machining amount of 0.30 mm;

in the sixth step, the workpiece processed in the fifth step is radially cut into two parts from the center of the workpiece by using a numerical control machine tool to obtain a formed workpiece, the numerical control machine tool uses a CBN cutting-off tool, and the cutting-off tool uses a soft turning cutting-off tool as a welding base body;

in the seventh step, the end face or the outer diameter of the formed workpiece obtained in the sixth step is used as a clamping face of the numerical control machine tool, the residual machining amount of the product is turned by using a spring grinding sheet clamping tool to manufacture the required bearing outer ring, and the turning tool is a CBN tool;

in the eighth step, the bearing outer ring prepared in the seventh step is placed in a heating furnace for heating, the heating temperature is 120-160 ℃, the heat preservation time is 2-4 hours, and then the bearing outer ring is taken out and cooled at normal temperature;

in the ninth step, the size of the bearing outer ring processed in the ninth step is measured by using a bearing measuring instrument, and then the bearing outer ring is inspected.

Based on the above, the invention has the advantages that the traditional production process of a single bearing outer ring at one time is changed, the combined bearing outer ring is processed and produced, the deformation of a material section caused by uneven stress in the forging process is avoided, the material is saved, the ellipse and the warpage of the product are eliminated by using the grinding machine, the damage of the product caused by the difference between the ellipse and the parallelism formed after quenching in the product removal process by using a numerical control lathe is avoided, and the reduction of the working efficiency caused by secondary processing production is avoided.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.