CN111468907A - Forming and processing technology for uniform-section ultrathin series bearing parts - Google Patents
Forming and processing technology for uniform-section ultrathin series bearing parts Download PDFInfo
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- CN111468907A CN111468907A CN202010414532.5A CN202010414532A CN111468907A CN 111468907 A CN111468907 A CN 111468907A CN 202010414532 A CN202010414532 A CN 202010414532A CN 111468907 A CN111468907 A CN 111468907A
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Abstract
The invention relates to a forming and processing technology of an ultrathin series bearing part with a uniform section, belonging to the technical field of mechanical equipment, wherein the processing method comprises the following steps: the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing parts before heat treatment and combine the two bearing parts into a whole; step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced; step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment; step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process. The not enough of prior art is overcome to this patent, will increase the intensity of heat treatment front bearing part, unites two into one two bearing parts, increases the strengthening rib in the middle of two parts, makes the deformation of heat treatment back bearing part reduce, has solved the defect that above-mentioned ultra-thin bearing part heat treatment can strengthen its deflection.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment, and particularly relates to a forming and processing process of an ultrathin series bearing part with a uniform cross section.
Background
The thin-wall bearing mainly meets the requirements of modern machinery on compactness, simplification and light weight of the design of a slewing mechanism, and has the characteristics of small volume, light weight, low friction and the like. A thin-walled bearing is distinguished from a standard bearing in that the cross-sectional dimension is designed to be a fixed value in each series, and is constant in the same series, and does not increase with increasing internal dimension. As is known to give full play to the mechanical properties of bearing steel materials, quenching and tempering heat treatment are required to be carried out on bearing parts, the wall of the bearing part of the equal-section ultrathin series is extremely thin, the deformation is large by adopting a conventional heat treatment mode, the bearing part is inevitably subjected to end face buckling deformation and inner and outer diameter elliptical deformation due to the heat treatment at the high temperature of 810-840 ℃, and the deformation of the ultrathin bearing part is increased by the heat treatment; in order to ensure the product quality, the processing allowance needs to be increased, so that great pressure and difficulty are caused to the subsequent procedures, the efficiency is low, the cost is high, and the profit margin is reduced to a certain extent.
Disclosure of Invention
In order to solve the technical problems, the invention provides a forming and processing technology of an ultrathin series bearing part with a uniform section, which overcomes the defects of the prior art, increases the strength of the bearing part before heat treatment, combines two bearing parts into a whole, and adds a reinforcing rib between the two parts, so that the deformation of the bearing part after heat treatment is reduced, and the defect that the deformation of the ultrathin bearing part is increased by heat treatment is overcome.
The invention creates the technical scheme adopted for solving the technical problems: a forming and processing technology for an ultrathin series bearing part with a uniform section comprises the following steps:
the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing parts before heat treatment and combine the two bearing parts into a whole;
step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced;
step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment;
step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process.
The wall of the constant-section ultrathin series bearing part is extremely thin, the deformation amount is large by adopting a conventional heat treatment mode, the bearing part is subjected to heat treatment at the high temperature of 810-840 ℃, the end face buckling deformation and the inner and outer diameter elliptical deformation of the bearing part can be generated, and the deformation amount of the ultrathin bearing part can be increased by the heat treatment of the ultrathin bearing part; in order to ensure the product quality, the machining allowance needs to be increased, so that great pressure and difficulty are caused to the subsequent procedures, the efficiency is low, the cost is high, and the profit margin is reduced to a certain extent; the deformation of the bearing part after heat treatment is reduced, and the defect that the deformation of the ultrathin bearing part is increased by the heat treatment is overcome.
Preferably, the grinding wheel is cut from the middle according to the width of the rib during the rough grinding of the inner diameter.
Preferably, the heat treatment is a quenching treatment, and the temperature during quenching is maintained at 810-840 ℃.
Preferably, the tempering temperature is 175 ℃ after the heat treatment, and the tempering time is 4-6 hours.
Preferably, the outer diameter and inner diameter rough grinding process is performed by using an automatic grinding line.
The invention has the beneficial effects that:
(1) the not enough of prior art is overcome to this patent, will increase the intensity of heat treatment front bearing part, unites two into one two bearing parts, increases the strengthening rib in the middle of two parts, makes the deformation of heat treatment back bearing part reduce, has solved the defect that above-mentioned ultra-thin bearing part heat treatment can strengthen its deflection.
(2) This patent reasonable in design reduces thermal treatment and warp, reduces the machining allowance, raises the efficiency, practices thrift the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an end view of a thin-walled bearing component having an equal cross-section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Embodiment 1, as shown in fig. 1, a process for forming and processing an ultrathin series bearing part with an equal section comprises the following steps:
the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing part before heat treatment and combining the two bearing part parts 1 and 2 into a whole;
step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced;
step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment;
step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process.
The wall of the constant-section ultrathin series bearing part is extremely thin, the deformation is large by adopting a conventional heat treatment mode, the bearing part is inevitably subjected to end face buckling deformation and inner and outer diameter elliptical deformation due to the heat treatment at the high temperature of 810 ℃, and the deformation of the ultrathin bearing part is increased by the heat treatment; in order to ensure the product quality, the machining allowance needs to be increased, so that great pressure and difficulty are caused to the subsequent procedures, the efficiency is low, the cost is high, and the profit margin is reduced to a certain extent; the deformation of the bearing part after heat treatment is reduced, and the defect that the deformation of the ultrathin bearing part is increased by the heat treatment is overcome.
In this embodiment, the grinding wheel is cut from the middle according to the width of the reinforcing rib when the inner diameter is roughly ground.
In this example, the heat treatment was carried out by quenching, and the temperature during quenching was maintained at 810 ℃.
In this embodiment, the tempering temperature after the heat treatment is 175 ℃, and the tempering time is 4 hours.
In this embodiment, the outer diameter rough grinding process and the inner diameter rough grinding process are performed by using an automatic grinding line.
Embodiment 2, as shown in fig. 1, a process for forming and processing an ultrathin series bearing part with an equal section, the process flow of the processing method is as follows:
the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing part before heat treatment and combining the two bearing part parts 1 and 2 into a whole;
step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced;
step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment;
step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process.
The wall of the constant-section ultrathin series bearing part is extremely thin, the deformation is large by adopting a conventional heat treatment mode, the bearing part is subjected to heat treatment at the high temperature of 840 ℃, the end face buckling deformation and the inner and outer diameter elliptical deformation of the bearing part can be inevitably generated, and the deformation of the ultrathin bearing part can be increased by the heat treatment of the ultrathin bearing part; in order to ensure the product quality, the machining allowance needs to be increased, so that great pressure and difficulty are caused to the subsequent procedures, the efficiency is low, the cost is high, and the profit margin is reduced to a certain extent; the deformation of the bearing part after heat treatment is reduced, and the defect that the deformation of the ultrathin bearing part is increased by the heat treatment is overcome.
In this embodiment, the grinding wheel is cut from the middle according to the width of the reinforcing rib when the inner diameter is roughly ground.
In this example, the heat treatment was carried out by quenching, and the temperature during quenching was maintained at 840 ℃.
In this embodiment, the tempering temperature after the heat treatment is 175 ℃, and the tempering time is 6 hours.
In this embodiment, the outer diameter rough grinding process and the inner diameter rough grinding process are performed by using an automatic grinding line.
Embodiment 3, as shown in fig. 1, a process for forming and processing an ultrathin series bearing part with an equal section comprises the following steps:
the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing part before heat treatment and combining the two bearing part parts 1 and 2 into a whole;
step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced;
step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment;
step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process.
The wall of the constant-section ultrathin series bearing part is extremely thin, the deformation is large by adopting a conventional heat treatment mode, the bearing part is subjected to heat treatment at 820 ℃, the end face buckling deformation and the inner and outer diameter elliptical deformation of the bearing part can be inevitably generated, and the deformation of the ultrathin bearing part can be increased by the heat treatment of the ultrathin bearing part; in order to ensure the product quality, the machining allowance needs to be increased, so that great pressure and difficulty are caused to the subsequent procedures, the efficiency is low, the cost is high, and the profit margin is reduced to a certain extent; the deformation of the bearing part after heat treatment is reduced, and the defect that the deformation of the ultrathin bearing part is increased by the heat treatment is overcome.
In this embodiment, the grinding wheel is cut from the middle according to the width of the reinforcing rib when the inner diameter is roughly ground.
In this example, the heat treatment was carried out by quenching, and the temperature during quenching was maintained at 820 ℃.
In this embodiment, the tempering temperature after the heat treatment is 175 ℃, and the tempering time is 5 hours.
In this embodiment, the outer diameter rough grinding process and the inner diameter rough grinding process are performed by using an automatic grinding line.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (5)
1. A forming and processing technology for an ultrathin series bearing part with a uniform section is characterized in that the processing method comprises the following steps:
the method comprises the following steps: firstly, carrying out heat treatment to increase the strength of the bearing parts before heat treatment and combine the two bearing parts into a whole;
step two: secondly, a reinforcing rib is added between the two parts, so that the deformation of the bearing part after heat treatment is reduced;
step three: then, adopting a conventional heat treatment mode, and carrying out rough grinding on the outer diameter and the inner diameter of the two parts subjected to heat treatment;
step four: and cutting off the reinforcing ribs by using cutting sheets after the coarse grinding process is finished to form two single bearing parts, and then performing a finish machining process.
2. The process for forming an ultrathin series of bearing components with uniform cross section as claimed in claim 1, wherein the grinding wheel is cut from the middle according to the width of the reinforcing rib during the rough grinding of the inner diameter.
3. The forming and processing technology for the uniform-section ultrathin series bearing parts as claimed in claim 1, wherein the heat treatment adopts quenching treatment, and the temperature during quenching is kept at 810-840 ℃.
4. The forming processing technology for the constant-section ultrathin series bearing parts as claimed in claim 1 or 3, characterized in that the tempering temperature is 175 ℃ and the tempering time is 4-6 hours after the heat treatment.
5. The process for forming and processing a constant-section ultrathin series bearing part as claimed in claim 1, wherein the procedures of roughly grinding the outer diameter and roughly grinding the inner diameter are carried out by using an automatic grinding production line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010414532.5A CN111468907A (en) | 2020-05-15 | 2020-05-15 | Forming and processing technology for uniform-section ultrathin series bearing parts |
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| CN202010414532.5A CN111468907A (en) | 2020-05-15 | 2020-05-15 | Forming and processing technology for uniform-section ultrathin series bearing parts |
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