阅读说明：本技术 一种手机震动马达轴承套的制作方法 (Manufacturing method of bearing sleeve of vibration motor of mobile phone ) 是由 盛行超 于 2020-12-02 设计创作，主要内容包括：本发明涉及手机震动马达技术领域,尤其为一种手机震动马达轴承套的制作方法,包括以下步骤：S1,备料；S2,锻造成型；S3,退火；S4,车削加工；S5,热处理；S6,粗磨；S7,细磨；S8,轴套超精打磨；S9,成型；通过对轴承套进行锻造成型获得与产品形状相似的毛坯,从而提高金属材料利用率,节约原材料,减少机械加工量,降低成本,消除金属内在缺陷,改善金属组织,使金属流线分布合理,金属紧密度好,从而提高轴承的使用寿命,通过热处理使轴承套的内在耐磨性、强韧性提高,提高抽成套的使用寿命,通过进行打磨成型使轴承套的的尺寸精度和形状精度达到设计要求,为手机震动马达轴承提供合格的轴承套,流程简单,生产效率高。(The invention relates to the technical field of mobile phone vibration motors, in particular to a manufacturing method of a mobile phone vibration motor bearing sleeve, which comprises the following steps: s1, preparing materials; s2, forging and forming; s3, annealing; s4, turning; s5, heat treatment; s6, coarse grinding; s7, fine grinding; s8, ultra-precision grinding of the shaft sleeve; s9, molding; the blank similar to the shape of the product is obtained by forging and forming the bearing sleeve, so that the utilization rate of metal materials is improved, raw materials are saved, the machining amount is reduced, the cost is reduced, the internal defects of metal are eliminated, the metal structure is improved, the metal streamline is reasonably distributed, the metal compactness is good, the service life of the bearing is prolonged, the internal wear resistance and the toughness of the bearing sleeve are improved through heat treatment, the service life of a drawing set is prolonged, the size precision and the shape precision of the bearing sleeve reach the design requirements through polishing and forming, the qualified bearing sleeve is provided for the mobile phone vibration motor bearing, the process is simple, and the production efficiency is high.)

1. A manufacturing method of a bearing sleeve of a vibration motor of a mobile phone is characterized by comprising the following steps:

s1, preparing materials;

s2, forging and forming;

s3, annealing;

s4, turning;

s5, heat treatment;

s6, coarse grinding;

s7, fine grinding;

s8, ultra-precision grinding of the shaft sleeve;

and S9, molding.

2. The method as claimed in claim 1, wherein the S1 stock is high-elastic chromium bearing steel Gcr15 SiMn.

3. The method as claimed in claim 1, wherein the S2 forging is performed in a line production process using an induction heating furnace, a press, a reamer, and a shaper.

4. The method for manufacturing the bearing sleeve of the vibration motor of the mobile phone according to claim 1, wherein the annealing of S3 is performed at 790-810 ℃ for 2-6 h, the temperature is lowered to below 600 ℃ at 10-30 ℃/h, and the bearing sleeve is taken out of a furnace for air cooling.

5. The method for manufacturing a bearing sleeve of a vibration motor of a mobile phone as claimed in claim 1, wherein the S4 lathe machining is performed on the bearing sleeve by using a lathe according to the parallelism, roughness and verticality of the machined surface of the bearing sleeve, the accuracy of the hole system and the mutual position accuracy of the hole system; the hole system precision comprises coaxiality, roundness and roughness, and the mutual position precision comprises the requirements of parallelism and perpendicularity between axes, parallelism and perpendicularity between the axes and a plane and the like.

6. The method for manufacturing the bearing sleeve of the vibrating motor of the mobile phone as claimed in claim 1, wherein the S5 heat treatment comprises quenching and low-temperature tempering quenching, and the quenching heating temperature is: 820-840 ℃, heat preservation time: 1-2 h, cooling medium: an oil; the low-temperature tempering quenching heating temperature is as follows: and (3) keeping the temperature at 150-180 ℃, wherein the heat preservation time is as follows: 2-5 h, cooling mode: and air cooling.

7. The method for manufacturing a bearing sleeve of a vibration motor of a mobile phone as claimed in claim 1, wherein the step S6 comprises coarse grinding the inner and outer surfaces of the bearing table by a grinding machine, leaving a margin of 0.2-0.3 mm, and measuring by inner diameter deci-gauge and outer diameter deci-gauge.

8. The manufacturing method of the bearing sleeve of the vibration motor of the mobile phone according to claim 1, wherein the S7 fine grinding machine is used for fine grinding of the inner hole and the outer surface of the bearing sleeve, the allowance is 0.05-0.1 mm, and the inner diameter deci-mm and the outer diameter deci-mm are used for measurement.

9. The method for manufacturing a bearing sleeve of a vibration motor of a mobile phone according to claim 1, wherein the S8 sets of superfinishing machines are used for sanding the outer wall and the hole wall of the bearing sleeve, the rotating speed of the main shaft of the workpiece of the superfinishing machine is 500-.

10. The method for manufacturing a bearing sleeve of a vibration motor of a mobile phone according to claim 1, wherein the step S9 is to demagnetize and clean the molded bearing sleeve, measure the size of the bearing sleeve, package the bearing sleeve and store the bearing sleeve in a warehouse.

Technical Field

The invention relates to the technical field of mobile phone vibration motors, in particular to a manufacturing method of a mobile phone vibration motor bearing sleeve.

Background

The type of the motor of the mobile phone: a cylindrical (hollow cup auswan) vibration motor; a flat button-type vibration motor; a linear motor; the process type and application of the mobile phone motor are as follows: 1. the wire type is manual welding and socket with connector; the material cost is low, a manufacturer needs to increase manual welding and assembling operation flows, and the labor cost is high; 2. the spring pieces are in contact type; special structural design and matching are needed, and the replaceability is poor; 3. the paster type: the method is divided into a planar surface mount type and a sinking plate surface mount type; early motor designers could not reduce the thickness of the motor to the minimum to meet the requirement of ultra-thinness of the mobile phone, developed a sunk plate type, and saved the thickness space of the PCB. The patch type motor has higher requirements on related materials because of the need of high-temperature reflow soldering, and the corresponding quality is the best of various types of motors and is also a material recommended by international brand mobile phones. The mobile phone motor generally refers to a small vibration motor applied to a mobile phone, and mainly has the effect of enabling the mobile phone to generate vibration, and a cylindrical vibration motor needs to fix a vibration motor bearing when being installed, so that a manufacturing method of a mobile phone vibration motor bearing sleeve is provided.

Disclosure of Invention

The invention aims to provide a method for manufacturing a bearing sleeve of a vibration motor of a mobile phone, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a manufacturing method of a bearing sleeve of a vibration motor of a mobile phone comprises the following steps:

s1, preparing materials;

s2, forging and forming;

s3, annealing;

s4, turning;

s5, heat treatment;

s6, coarse grinding;

s7, fine grinding;

s8, ultra-precision grinding of the shaft sleeve;

and S9, molding.

Preferably, the S1 stock is made of high-elasticity chromium bearing steel Gcr15 SiMn.

Preferably, the forging and forming of S2 is performed in line with an apparatus in which an induction heating furnace, a press, a reamer, and a shaper are connected.

Preferably, the annealing of S3 is carried out at 790-810 ℃ for 2-6 h, the temperature is cooled to below 600 ℃ at 10-30 ℃/h, and the product is taken out of the furnace for air cooling.

Preferably, the turning process of S4 is to turn the bearing sleeve by using a lathe according to the parallelism, roughness and perpendicularity of the machined surface of the bearing sleeve, the accuracy of the hole system itself (coaxiality, roundness, roughness, etc.) and the accuracy of their mutual positions (the requirements of parallelism and perpendicularity between axes and planes, etc.).

Preferably, the S5 heat treatment includes quenching and low-temperature tempering quenching, and the quenching heating temperature is: 820-840 ℃, heat preservation time: 1-2 h, cooling medium: an oil; the low-temperature tempering quenching heating temperature is as follows: and (3) keeping the temperature at 150-180 ℃, wherein the heat preservation time is as follows: 2-5 h, cooling mode: and air cooling.

Preferably, the S6 rough grinding adopts the polisher to carry out the rough grinding to the hole and the surface of bearing platform, leaves the surplus 0.2 ~ 0.3mm, adopts inside diameter deci-card and outside diameter deci-card measurement.

Preferably, the S7 fine grinding adopts a grinding machine to finish the inner hole and the outer surface of the bearing sleeve, the allowance is 0.05-0.1 mm, and the inner diameter deci-meter and the outer diameter deci-meter are adopted for measurement.

Preferably, the superfinishing of the S8 set adopts a superfinishing machine to polish the outer wall and the hole wall of the shaft sleeve, the rotating speed of a workpiece main shaft of the superfinishing machine is 500-.

Preferably, in S9, the molded bearing sleeve is demagnetized and cleaned, and then dimension measurement is performed, and packaging and warehousing are performed.

Compared with the prior art, the invention has the beneficial effects that:

in the invention, the blank similar to the product in shape is obtained by forging and forming the bearing sleeve, so that the utilization rate of metal materials is improved, raw materials are saved, the machining amount is reduced, the cost is reduced, the internal defects of metal are eliminated, the metal structure is improved, the metal streamline is reasonably distributed, the metal compactness is good, the service life of the bearing is prolonged, the internal wear resistance and the toughness of the bearing sleeve are improved through heat treatment, the service life of a drawing set is prolonged, the size precision and the shape precision of the bearing sleeve reach the design requirements through polishing and forming, the qualified bearing sleeve is provided for the mobile phone vibration motor bearing, the process is simple, and the production efficiency is high.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

The invention provides a technical scheme that:

a manufacturing method of a bearing sleeve of a vibration motor of a mobile phone comprises the following steps:

s1, preparing materials;

s2, forging and forming;

s3, annealing;

s4, turning;

s5, heat treatment;

s6, coarse grinding;

s7, fine grinding;

s8, ultra-precision grinding of the shaft sleeve;

and S9, molding.

And the S1 stock selects high-elasticity chromium bearing steel Gcr15 SiMn.

And S2 forging and forming are carried out in line production by equipment which is formed by an induction heating furnace, a press machine, a reamer and a shaping machine.

And (3) carrying out S3 annealing, keeping the temperature at 790-810 ℃ for 2-6 h, cooling to below 600 ℃ at a speed of 10-30 ℃/h, discharging and air cooling.

And S4 turning, namely turning the bearing sleeve by using a lathe according to the parallelism, roughness and perpendicularity of the machined surface of the bearing sleeve, the accuracy (coaxiality, roundness, roughness and the like) of the hole system and the accuracy (the parallelism and perpendicularity between the axes, the parallelism and perpendicularity between the axes and the plane and the like) of the mutual positions of the hole system.

The S5 heat treatment comprises quenching and low-temperature tempering quenching, wherein the quenching heating temperature is as follows: 820-840 ℃, heat preservation time: 1-2 h, cooling medium: an oil; the low-temperature tempering quenching heating temperature is as follows: and (3) keeping the temperature at 150-180 ℃, wherein the heat preservation time is as follows: 2-5 h, cooling mode: and air cooling.

S6 coarsely grinds and adopts the polisher to carry out the coarsely grinding to the hole and the surface of bearing platform, leaves surplus 0.2 ~ 0.3mm, adopts inside diameter minute chi and external diameter minute chi to measure.

And S7 fine grinding is carried out by adopting a grinding machine to carry out fine grinding on the inner hole and the outer surface of the bearing sleeve, the allowance is kept to be 0.05-0.1 mm, and the inner diameter micrometer and the outer diameter micrometer are adopted for measurement.

The S8 set of superfinishing adopts a superfinishing machine to polish the outer wall and the hole wall of the shaft sleeve, the rotating speed of a workpiece main shaft of the superfinishing machine is 500-.

And S9, demagnetizing and cleaning the molded bearing sleeve, measuring the size of the bearing sleeve, packaging and warehousing.

The blank similar to the shape of the product is obtained by forging and forming the bearing sleeve, so that the utilization rate of metal materials is improved, raw materials are saved, the machining amount is reduced, the cost is reduced, the internal defects of metal are eliminated, the metal structure is improved, the metal streamline is reasonably distributed, the metal compactness is good, the service life of the bearing is prolonged, the internal wear resistance and the toughness of the bearing sleeve are improved through heat treatment, the service life of a drawing set is prolonged, the size precision and the shape precision of the bearing sleeve reach the design requirements through polishing and forming, the qualified bearing sleeve is provided for the mobile phone vibration motor bearing, the process is simple, and the production efficiency is high.

Example (b): preparing materials; forging and forming; annealing; turning; heat treatment; coarse grinding; fine grinding; superfinishing the shaft sleeve; molding; preparing materials, selecting high-elasticity chromium bearing steel Gcr15SiMn, carrying out flow operation on the high-elasticity chromium bearing steel Gcr15SiMn in equipment consisting of an induction heating furnace, a press machine, a hole expanding machine and a shaping machine, preserving the high-elasticity chromium bearing steel Gcr15SiMn for 2-6 h at 790-810 ℃, cooling to below 600 ℃ at 10-30 ℃/h, discharging from the furnace for air cooling, annealing the high-carbon chromium bearing steel to ensure that fine, small, uniform and round carbide shell tissues are uniformly distributed on a ferrite matrix, turning the bearing sleeve by adopting a lathe according to the parallelism, roughness and verticality of the processing surface of the bearing sleeve, the self precision (coaxiality, roundness, roughness and the like) of a hole system and the mutual position precision (the parallelism between axes, the verticality, the parallelism between axes and a plane, the verticality and the like) of the shaft sleeve, and completely conforming the processed bearing sleeve to the final product, wherein the heat treatment comprises quenching and tempering, the quenching heating temperature is as follows: 820-840 ℃, heat preservation time: 1-2 h, cooling medium: an oil; the low-temperature tempering quenching heating temperature is as follows: and (3) keeping the temperature at 150-180 ℃, wherein the heat preservation time is as follows: 2-5 h, cooling mode: air cooling to improve the inherent wear resistance and toughness of the bearing sleeve and prolong the service life of the drawing set, adopting a grinding machine to carry out coarse grinding on the inner hole and the outer surface of the bearing table, leaving a margin of 0.2-0.3 mm, adopting inner diameter decitex and outer diameter decitex to measure, then finely grinding the inner hole and the outer surface of the bearing sleeve by adopting the grinding machine, leaving a margin of 0.05-0.1 mm, adopting inner diameter decitex and outer diameter decitex to measure, adopting a superfinishing machine to grind the outer wall and the hole wall of the bearing sleeve, carrying out rotation speed of a main shaft of a workpiece of the superfinishing machine of 500 plus-8000 (r/min), oscillating frequency of oilstone of 35-1000 (times/min) and oscillating angle of 0-plus or minus 20 degrees, leading the dimensional precision and the shape precision of the bearing sleeve to meet the design requirements, providing a qualified bearing sleeve for a vibration motor bearing of a mobile phone, carrying out dimensional measurement after demagnetizing and cleaning on the formed bearing, the blank similar to the shape of the product is obtained by forging and forming the bearing sleeve, so that the utilization rate of metal materials is improved, raw materials are saved, the machining amount is reduced, the cost is reduced, the internal defects of metal are eliminated, the metal structure is improved, the metal streamline is reasonably distributed, the metal compactness is good, the service life of the bearing is prolonged, the internal wear resistance and the toughness of the bearing sleeve are improved through heat treatment, the service life of a drawing set is prolonged, the size precision and the shape precision of the bearing sleeve reach the design requirements through polishing and forming, the qualified bearing sleeve is provided for the mobile phone vibration motor bearing, the process is simple, and the production efficiency is high.

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.