CN115592089A

CN115592089A - Surface treatment and forming process of clutch cover

Info

Publication number: CN115592089A
Application number: CN202211321369.3A
Authority: CN
Inventors: 袁应宏; 吴许青
Original assignee: Changzhou Haojue Suzuki Motorcycle Co ltd
Current assignee: Changzhou Haojue Suzuki Motorcycle Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-01-13

Abstract

The invention relates to a surface treatment and forming process of a clutch cover, which has the innovation points that: the specific process steps are as follows: performing shot blasting or sand blasting on a die before die casting, performing shot blasting or sand blasting on a die after shot blasting or sand blasting to produce a product, polishing the product (qualified for inspection), coating, offline inspection, and circulating qualified products; the method comprises the steps of firstly carrying out shot blasting treatment or sand blasting treatment on a die for die casting of the clutch cover, then carrying out die casting forming on the clutch cover by using the die and die casting equipment, finally polishing a formed clutch cover die casting piece, then coating, and carrying out off-line inspection and circulation if the product is qualified. The invention directly carries out shot blasting or sand blasting treatment on the mould, thereby eliminating the process that the clutch cover needs to be subjected to shot blasting treatment in the cleaning process, not only enabling the product to meet the requirement of appearance quality standard once, but also not generating unnecessary reworking, improving the productivity and the qualification rate of the product and reducing the production cost.

Description

Surface treatment and forming process of clutch cover

Technical Field

The invention relates to a surface treatment and forming process, in particular to a surface treatment and forming process of a clutch cover used on a motorcycle.

Background

The existing clutch cover surface treatment and forming process comprises the following steps: the die casting production of the die → the product is shot-blasted by a shot blasting machine → the product is polished (qualified for inspection) → coating → offline inspection → qualified circulation. Because cold shut, layering, bubbling and other pressure casting defects can be generated during the die casting of the clutch cover, the defects can be exposed and generate a peeling phenomenon after the shot blasting treatment of the clutch cover, recognizable products can peel, and after the grinding and passing, unrecognizable peeled products can flow into the next coating process.

Disclosure of Invention

The purpose of the invention is: the process for surface treatment and forming of the clutch cover is characterized in that shot blasting or sand blasting is directly carried out on a die, so that the clutch cover is not required to be subjected to shot blasting in a cleaning process, the product can meet the requirement of appearance quality standard at one time, unnecessary reworking is avoided, the production rate and the qualification rate of the product are improved, and the production cost is reduced.

In order to achieve the purpose, the technical scheme of the invention is as follows: a clutch cover surface treatment and forming process comprises the following specific process steps:

the method comprises the following steps: performing shot blasting treatment or sand blasting treatment on the part of the die cavity for forming the clutch cover by die casting;

step two: performing die-casting molding on the clutch cover by using a die and die-casting equipment;

step three: and polishing the formed clutch cover die casting, coating, and circulating after the off-line inspection is qualified.

In the above technical solution, if the shot blasting is performed on the cavity of the mold in the first step, the specific steps are as follows: throwing the stainless steel shot by using an impeller which rotates at a high speed of the shot blasting machine, impacting a cavity part of the die at a high speed, removing foreign matters and burrs on the surface, removing the surface stress of the die and enhancing the strength of the cavity part of the die, wherein the shot blasting frequency is 17 +/-5 Hz, and the shot blasting time is 3 +/-1 minute.

In the above technical solution, if the sand blasting is performed on the cavity of the mold in the first step, the specific steps are as follows: the quartz is blown to the cavity of the mold by compressed air for sand blasting treatment, the sand blasting pressure is 0.15-0.6 MPa, and the sand blasting time is 3 +/-1 min.

In the technical scheme, the grinding of the formed clutch cover in the third step comprises the following specific steps: (1) removing residues of a product pouring gate and an overflow port by using a filing cutter; (2) removing the product hole interlayer by using a pneumatic reciprocating roller; (3) removing burrs of a product by using a flush flat file; (4) removing cold shut and carbon deposition on the surface of the product by using a pneumatic engraving and grinding machine; (5) polishing and grinding the surface of the product by using a grinder; (6) and (4) performing full inspection and confirmation on the product according to a qualified sample, and flowing into coating after inspection.

The invention has the positive effects that: after the surface treatment and forming process of the clutch cover is adopted, the improved process flow is as follows: performing shot blasting or sand blasting on a die before die casting, performing shot blasting or sand blasting on a die after the shot blasting or the sand blasting to produce a product, polishing (qualified inspection) the product, coating, offline inspection, and transferring to qualified products; the method comprises the steps of firstly carrying out shot blasting treatment or sand blasting treatment on a die for die-casting the clutch cover, then carrying out die-casting forming on the clutch cover by using the die and a die-casting device, finally polishing a formed clutch cover die-casting piece, then coating, and after off-line inspection, circulating if the product is qualified;

the invention can remove the surface stress of the die and increase the strength of the die by directly performing shot blasting or sand blasting on the die, and can save the polishing time for polishing the die due to carbon deposition generated by the die, reduce the maintenance time of the die and achieve the aim of maintaining and maintaining the die;

the process technology achieves the purpose of product shot blasting through mold shot blasting or sand blasting, has strong universality, can solve the problem of product peeling caused by product shot blasting on one hand and also avoid the problem that the peeled product flows into coating and needs to be repaired after coating, and can meet the requirement of product appearance quality standard once without generating unnecessary repair working hours; on the other hand, the product is not shot, so that the shot blasting time of the product can be saved, the shot blasting time per piece can be 3 minutes, the production rate and the qualification rate of the product are improved, and the production cost of the product is reduced.

Drawings

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

Detailed Description

The invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.

As shown in fig. 1, a surface treatment and forming process of a clutch cover includes the following specific steps:

the method comprises the following steps: performing shot blasting treatment or sand blasting treatment on a die for die-casting the clutch cover; if shot blasting is carried out on the die, the specific steps are as follows: throwing stainless steel shots by using a high-speed rotating impeller of a shot blasting machine, impacting a cavity part of a mold at a high speed, removing foreign matters and burrs on the surface, removing the surface stress of the mold and enhancing the strength of the cavity part of the mold, wherein the shot blasting frequency is 17 +/-5 Hz, the shot blasting time is 3 +/-1 min, the specific frequency of the shot blasting is 17Hz, and the shot blasting time is 3 min; if the sand blasting treatment is carried out on the mould, the concrete steps are as follows: blowing the quartz to the mold cavity by using compressed air to perform sand blasting treatment, wherein the sand blasting pressure is 0.15-0.6 MPa, and the sand blasting time is 3 +/-1 minute;

step two: die-casting the clutch cover by using a die and die-casting equipment;

step three: coating the formed die casting of the clutch cover after polishing, and circulating after the off-line inspection is qualified, wherein the polishing of the formed clutch cover comprises the following specific steps: (1) removing residues of a product pouring gate and an overflow port by using a filing cutter; (2) removing the product hole interlayer by using a pneumatic reciprocating roller; (3) removing burrs of a product by using a flush flat file; (4) removing cold shut and carbon deposition on the surface of the product by using a pneumatic engraving and grinding machine; (5) polishing and grinding the surface of the product by using a grinder; (6) performing full inspection and confirmation on the product according to a qualified sample, and flowing into coating after inspection is qualified;

in the third step, the concrete steps of coating the formed clutch cover after polishing are as follows: hanging the product → heating and degreasing the product → washing the product → spraying primer → spraying finish → heating and drying → picking and inspecting → repairing bad problem parts of the product, normally circulating the repaired qualified product and scrapping the unqualified product.

The test method comprises the following steps: visual comparison product appearance standard confirmation.

The invention preferably selects the cavity part of the mould to carry out sand blasting treatment because the sand blasting is fine and the precision is easy to control, and is used for occasions with complex shapes, uneven rust removal and low treatment efficiency.

The improved process flow of the invention is as follows: performing shot blasting or sand blasting on a die before die casting, performing shot blasting or sand blasting on a die after shot blasting or sand blasting to produce a product, polishing the product (qualified for inspection), coating, offline inspection, and circulating qualified products; the method comprises the steps of firstly carrying out shot blasting treatment or sand blasting treatment on a die for die casting of the clutch cover, then carrying out die casting forming on the clutch cover by using the die and die casting equipment, finally polishing a formed clutch cover die casting, coating, and circulating if a product is qualified after offline inspection;

the invention directly carries out shot blasting or sand blasting treatment on the die, thereby canceling the process that the clutch cover needs to be subjected to shot blasting treatment again in the cleaning process, and because the shot blasting or sand blasting treatment is directly carried out on the die, the surface stress of the die can be removed to increase the strength of the die, meanwhile, the polishing time that the die needs to be polished due to carbon deposition generated by the die can be saved, the maintenance and maintenance time of the die is reduced, and the aim of maintaining and maintaining the die is also fulfilled.

In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A clutch cover surface treatment and forming process is characterized in that: the specific process steps are as follows:

the method comprises the following steps: performing shot blasting treatment or sand blasting treatment on a cavity part of a die for forming the clutch cover by die casting;

2. The clutch cover surface treatment and molding process according to claim 1, wherein: if the shot blasting treatment is carried out on the cavity part of the mold in the first step, the specific steps are as follows: the impeller rotating at high speed of the shot blasting machine is utilized to throw up the stainless steel shots, impact the cavity part of the die at high speed, remove foreign matters and burrs on the surface, remove the surface stress of the die and enhance the strength of the cavity part of the die, the shot blasting frequency is 17 plus or minus 5Hz, and the shot blasting time is 3 plus or minus 1 minute.

3. The clutch cover surface treatment and molding process according to claim 1, wherein: if the sand blasting treatment is carried out on the cavity part of the mould in the first step, the concrete steps are as follows: the quartz is blown to the cavity of the mold by compressed air for sand blasting treatment, the sand blasting pressure is 0.15-0.6 MPa, and the sand blasting time is 3 +/-1 min.

4. The clutch cover surface treatment and molding process according to claim 1, wherein: the concrete steps of polishing the formed clutch cover in the third step are as follows: (1) removing residues of a product pouring gate and an overflow port by using a filing cutter; (2) removing the product hole interlayer by using a pneumatic reciprocating roller; (3) removing burrs of the product by using a flush flat file; (4) removing cold insulation and carbon deposition on the surface of the product by using a pneumatic engraving and grinding machine; (5) polishing and grinding the surface of the product by using a grinder; (6) and (4) carrying out full inspection and confirmation on the product according to a qualified sample, and flowing into coating after inspection and qualification.