CN105729314A - Shot blasting process selection method for floating support friction piece - Google Patents
Shot blasting process selection method for floating support friction piece Download PDFInfo
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- CN105729314A CN105729314A CN201610221986.4A CN201610221986A CN105729314A CN 105729314 A CN105729314 A CN 105729314A CN 201610221986 A CN201610221986 A CN 201610221986A CN 105729314 A CN105729314 A CN 105729314A
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- shot
- friction plate
- tooth
- blast process
- float support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
Abstract
The invention provides a shot blasting process selection method for a floating support friction piece. The floating support friction piece is in a circular ring shape. The inner side surface of the floating support friction piece is of a tooth profile structure. The shot blasting process selection method comprises the following steps that 1, region division is conducted on the tooth profile structure on the inner side surface of the floating support friction piece; 2, different shot blasting processes are carried out on tooth profile structure bodies in different regions; 3, dynamic strength detection is conducted on the tooth profile structure bodies in the different regions on the same friction piece dynamic strength test bed; and 4, the best shot blasting process type is screened out according to the detection result. According to the technical solution provided by the invention, the best shot blasting process type of the floating support friction piece can be rapidly and precisely determined, and a great deal of manpower, material resources and time are saved.
Description
Technical field
The present invention relates to a kind of shot-blast process system of selection, in particular to the shot-blast process system of selection of a kind of float support friction plate.
Background technology
Float support friction plate is the Key basic parts realizing drive system gear switch and power transmission, has the features such as relative rotation speed height, compact conformation, transmission power are big, widely uses on various automobiles and engineering truck.In vehicle operation, the teeth portion generation impact of the teeth portion of friction plate and interior hub, after running a period of time, friction plate there will be fatigue fracture, has a strong impact on the running status of vehicle.
By to the working environment analysis of friction plate it can be seen that belong to weak area at the bottom of friction plate tooth, bear maximum alternating stress load.Fracture analysis is it can be seen that fatigue fracture germinates in lower surface at the bottom of tooth.It is effectively improved the resistance to vibration of friction plate, it is necessary to start with from improving and reduce weak area load at the bottom of friction plate tooth.Favourable residual compressive stress distribution is introduced, it is possible to effectively alleviate institute at the bottom of tooth loaded, increasing the closing force of micro-crack, blocking cracks can spread, thus extending fatigue life by bead.
Owing to shot peening strengthening is a complicated dynamic crash contact process, relating to multiple nonlinear coupling, influence factor is numerous, and the selection of current shot-blast process type can only rely on test or experience, compares and takes time and effort, and not necessarily has the effect of the best.Simultaneously, dynamic strength test after float support friction plate one integral piece shot peening strengthening is to carry out on unit for dynamic strength of friction disk testing stand, suffered float support shock loading is random, and the difference of float support friction plate own causes that the unit for dynamic strength of friction disk result of the test coefficient of dispersion is relatively larger, comparability is poor, and data reliability is relatively low, as improved the confidence level of data, needing to carry out the test of high-volume one integral piece, cost is too high and inefficiency.
Summary of the invention
In order to solve above-mentioned deficiency existing in prior art, the present invention provides the shot-blast process system of selection of a kind of new float support friction plate, the method can be quick, determines the best shot-blast process type of float support friction plate accurately, saves substantial amounts of human and material resources and time.
Present invention provide the technical scheme that the shot-blast process system of selection of a kind of float support friction plate, described float support friction plate is annular, and its medial surface is tooth-shape structure, and it thes improvement is that: said method comprising the steps of:
Step 1, carries out region division to the tooth-shape structure on described float support friction plate medial surface；
Step 2, implements different shot-blast processes to the tooth-shape structure of zones of different；
Step 3, carries out resistance to vibration detection to the tooth-shape structure of zones of different on same unit for dynamic strength of friction disk testing stand；
Step 4, filters out the shot-blast process type of the best according to testing result.
Preferably, by the color that described tooth-shape structure labelling is different, it being carried out region division in described step 1, different colors represents different regions.
Further, each region is made up of several scattered subregions, and every sub regions is made up of at least 4 teeth of continuous print.
Preferably, in described step 2 when one of them region is carried out shot-blast process, the tooth in other regions is blocked protection.
Further, the described tooth to other regions blocks protection is by the tooth in other regions winding insulating black adhesive tape is blocked protection.
Preferably, also include after described step 1: the tooth-shape structure in one of them region after division is labeled as the region not applying shot-blast process.
Preferably, described step 4 is determined according to the crack number implementing occur bottom the tooth-shape structure of different shot-blast process the quality of shot-blast process, select the minimum shot-blast process of crack number as best shot-blast process.
Preferably, the tooth-shape structure on described float support friction plate medial surface includes at least 100 teeth.
Compared with immediate prior art, the present invention has following marked improvement:
The present invention processes by implementing different shot-blast process on teeth different on same float support friction plate, make the tooth that there is different shot-blast process on same part friction plate, owing on float support friction plate, the number of teeth is more, make the tooth of every kind of shot-blast process on float support friction plate can both keep bigger sample size, different shot-blast processes is implemented relative to prior art uses different float support friction plates, can substantially reduce the float support friction plate quantity for testing, filter out the shot-blast process of the best fast and effectively；Detect it addition, same float support friction plate is arranged on same unit for dynamic strength of friction disk testing stand, the tooth of different shot-blast processes on float support friction plate can be made to keep identical operating condition of test.Identical operating condition of test, plus bigger sample size, significantly increases the comparability of test data, improves the confidence level of data, save substantial amounts of financial resources, man power and material.
Accompanying drawing explanation
Fig. 1 is the structural representation of float support friction plate provided by the invention,
Fig. 2 is the tooth-shape structure enlarged drawing of float support friction plate provided by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
In order to thoroughly understand the embodiment of the present invention, detailed structure will be proposed in following description.Obviously, the execution of the embodiment of the present invention is not limited to the specific details that those skilled in the art has the knack of.Presently preferred embodiments of the present invention is described in detail as follows, but except these detailed descriptions, the present invention can also have other embodiments.
The present invention provides the shot-blast process system of selection of a kind of float support friction plate, and float support friction plate is medial surface is the annular of many toothings, its structure as it is shown in figure 1, mainly adopt many toothings to be connected with interior hub, major part tooth participation work during work.The flank of tooth of float support friction plate is mainly processed by shot peening strengthening, during shot-peening, it is necessary to institute's geared surface of float support friction plate is carried out shot-peening, processes position as shown in Figure 2.Introduce the distribution of favourable residual compressive stress, it is possible to effectively alleviate institute at the bottom of tooth loaded, increase the closing force of micro-crack, block cracks can spread, thus extending friction plate fatigue life.
But, the selection of shot-blast process type can only rely on test or experience, compares and takes time and effort, and not necessarily has the effect of the best.Simultaneously, dynamic strength test after float support friction plate entirety shot peening strengthening is to carry out on unit for dynamic strength of friction disk testing stand, suffered float support shock loading is random, and the difference of float support friction plate own causes that the unit for dynamic strength of friction disk result of the test coefficient of dispersion is relatively larger, comparability is poor, as improved the credibility of data, it is necessary to carry out large batch of one integral piece test, cost is too high and inefficiency.The present invention processes by implementing different shot-blast process on the different teeth on same float support friction plate so that there is the tooth of different shot-blast process on same part float support friction plate.Owing on float support friction plate, the number of teeth is more so that on float support friction plate, the tooth of every kind of shot-blast process can both keep bigger sample size.During test, being arranged on unit for dynamic strength of friction disk testing stand by float support friction plate and test, the tooth of the different shot-blast processes on float support friction plate keeps identical operating condition of test.Identical operating condition of test, plus bigger sample size, significantly increases the comparability of test data.Adding up the crackle number existed bottom tooth on friction plate after test, filtering out the optimised process type of shot-peening, thus improving the screening efficiency of shot-blast process.
Before test, first the tooth-shape structure to float support friction pieces carries out region division, the color that the tooth labelling of zones of different is different or different numberings, consider the total number of teeth of friction plate and reduce the impact of adjacent shot-blast process, implement the shot-blast process of a kind of state every 4～5 teeth, blue tooth is shot-blast process 1, and red tooth is shot-blast process 2, remaining green tooth is the tooth of (the non-bead) of initial condition, carries out rotation by this and replaces shot-peening.When carrying out a kind of shot-blast process, need to be undertaken blocking protection by other teeth, for instance other regions are wound blocking by available insulating black adhesive tape every time.
For diameter 428 float support friction plate, it is considered to the diameter 428 float support friction plate number of teeth is more, it is possible to implement two kinds of shot-blast processes, it is embodied as step as follows:
(1) first at the bottom of corresponding each tooth, numbering is write successively.Diameter 428 float support friction plate has 122 teeth altogether, and concrete coding rule is as shown in table 1:
Table 1 friction plate numbering and shot-blast process
(2) shot-blast process 1 is implemented.The tooth implementing shot-blast process 1 is exposed, the tooth black belt of the tooth of initial condition and implementing process 2 is wrapped up and protects, make it unaffected when implementing shot-blast process 1.
(3) shot-blast process 2 is implemented.The tooth implementing shot-blast process 2 is exposed, the tooth black belt of the tooth of initial condition and implementing process 1 is wrapped up and protects so that it is be unaffected when implementing shot-blast process 2.
After (4) two kinds of shot-blast processes are implemented, detecting the float support unit for dynamic strength of friction disk after shot-peening on same unit for dynamic strength of friction disk testing stand, testing program carries out according to company standard Q/AT201.071 2007.Detection 2 altogether.
Rig test result and the friction plate crack number of front 2 friction plates are as shown in table 2.The crackle number of teeth portion on statistics friction plate, it can be seen that the teeth portion crackle number of non-shot-peening will far more than the crackle number of shot-peening teeth portion.Can be seen that shot-peening can actually be effectively improved the ability of Resisting fractre.
Table 2 friction plate result of the test
Get rid of the tooth of initial condition according to result of the test, friction plate numbering 3 and 4 is implemented shot-blast process 1 and shot-blast process 2.The rig test result of friction plate and friction plate crack number, as shown in table 3.The fissure stricture of vagina number implementing the friction plate of shot-blast process 1 to be considerably less than the fissure stricture of vagina number of the friction plate implementing shot-blast process 2.
Table 3 friction plate result of the test
Finally, take turns result of the test and crackle statistical number according to front 2, have selected shot-blast process 2 and carried out full-depth tooth checking test, amount to 3.Result of the test shows, the resistance to vibration life-span of float support friction plate improves more than 50%.
More than test and need float support friction agreement that contracts a film or TV play to an actor or actress 7 altogether, as data confidence need to be improved further, can suitably increase the float support friction plate quantity of test.If the method not adopting gear teeth contrast test, the method adopting float support friction plate the best shot-blast process of full-depth tooth checking.Owing to suffered float support shock loading is random, and the difference of float support friction plate own causes that the unit for dynamic strength of friction disk result of the test coefficient of dispersion is relatively larger, every kind of state needs 6 with upper floating support friction plate, need more than the about 18 best shot-blast processes that could probably determine float support friction plate altogether, increase cost, consuming time and waste engineering resource simultaneously.And technical scheme provided by the invention can determine the best shot-blast process type of float support friction plate quickly and accurately, saves substantial amounts of human and material resources and time.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit; although the present invention being described in detail with reference to above-described embodiment; the specific embodiment of the present invention still can be modified or equivalent replacement by those of ordinary skill in the field; these are without departing from any amendment of spirit and scope of the invention or equivalent replace, all within the claims that application is awaited the reply.
Claims (8)
1. a shot-blast process system of selection for float support friction plate, described float support friction plate is annular, and its medial surface is tooth-shape structure, it is characterised in that: said method comprising the steps of:
Step 1, carries out region division to the tooth-shape structure on described float support friction plate medial surface；
Step 2, implements different shot-blast processes to the tooth-shape structure of zones of different；
Step 3, carries out resistance to vibration detection to the tooth-shape structure of zones of different on same unit for dynamic strength of friction disk testing stand；
Step 4, filters out the shot-blast process type of the best according to testing result.
2. the shot-blast process system of selection of a kind of float support friction plate according to claim 1, it is characterised in that:
By the color that described tooth-shape structure labelling is different, it being carried out region division in described step 1, different colors represents different regions.
3. the shot-blast process system of selection of a kind of float support friction plate according to claim 1 and 2, it is characterised in that:
Each region is made up of several scattered subregions, and every sub regions is made up of at least 4 teeth of continuous print.
4. the shot-blast process system of selection of a kind of float support friction plate according to claim 1, it is characterised in that:
In described step 2 when one of them region is carried out shot-blast process, the tooth in other regions is blocked protection.
5. the shot-blast process system of selection of a kind of float support friction plate according to claim 4, it is characterised in that:
It is by the tooth in other regions winding insulating black adhesive tape is blocked protection that the described tooth to other regions blocks protection.
6. the shot-blast process system of selection of a kind of float support friction plate according to claim 1, it is characterised in that:
Also include after described step 1: the tooth-shape structure in one of them region after division is labeled as the region not applying shot-blast process.
7. the shot-blast process system of selection of a kind of float support friction plate according to claim 1, it is characterised in that:
Described step 4 is determined according to the crack number implementing occur bottom the tooth-shape structure of different shot-blast process the quality of shot-blast process, selects the minimum shot-blast process of crack number as best shot-blast process.
8. the shot-blast process system of selection of a kind of float support friction plate according to claim 1, it is characterised in that:
Tooth-shape structure on described float support friction plate medial surface includes at least 100 teeth.
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| CN201610221986.4A CN105729314B (en) | 2016-04-11 | 2016-04-11 | A kind of shot-blast process selection method of floating support friction plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111496683A (en) * | 2019-12-31 | 2020-08-07 | 沈阳造币有限公司 | Jet type polishing method for coinage mold |
| CN111563317A (en) * | 2020-04-14 | 2020-08-21 | 中国北方车辆研究所 | Shot peening strengthening evaluation method for floating support friction plate |
| CN111876560A (en) * | 2020-07-23 | 2020-11-03 | 中国北方车辆研究所 | Composite strengthening method for friction plate tooth part |
| CN114088762A (en) * | 2022-01-10 | 2022-02-25 | 中国科学院力学研究所 | Method and device for testing equivalent hot spot local thermal fatigue load of floating friction plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496683A (en) * | 2019-12-31 | 2020-08-07 | 沈阳造币有限公司 | Jet type polishing method for coinage mold |
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| CN111876560A (en) * | 2020-07-23 | 2020-11-03 | 中国北方车辆研究所 | Composite strengthening method for friction plate tooth part |
| CN114088762A (en) * | 2022-01-10 | 2022-02-25 | 中国科学院力学研究所 | Method and device for testing equivalent hot spot local thermal fatigue load of floating friction plate |
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| CN105729314B (en) | 2019-07-12 |
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