Modified Cleaning

 

CLEANING SHOP

The wheel coming out of the casting shop has a rough, uneven surface. These wheels need to be cleaned and finished before its usage. These cleaning, finishing and certain tests are conducted in this cleaning shop.

APEX GRINDING

In this operation, only the rim part of the wheel is grinded to a fine surface finish using a grinding wheel and sent to shot blasting.

SHOT/ STEEL BLASTING

The surface of the wheel may contain dirt, ashes, and even d dust ust particles formed during storing. Also the wheels contain scales formed during heat treatment process. This unwanted dust must  be removed in order to obtain a clean surfaced wheel. Steel blasting is the second process carried out in the cleaning shop.   In this process tiny tiny spherical metal particle particle with high velocity is made made to strike the surface of the wheel. •

Due to the impact of these particles the surface dust present on the wheel gets removed

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due to the abrasive action. Hence the surface cleaned wheel is obtained after this steel blasting process.

After this steel blasting the wheel is made to undergo  tests namely ultrasonic test and magnaglo test. !nly those wheels passed in these test are sent to further processing and the wheels with defects are re"ected. The re"ected wheels are sent to scrap yard and is recycled.

 

BRINELL HARDNESS TEST

In this test, the hardness of the wheel after undergoing u ndergoing #agnaglo Te Test st is determined by grinding wheel. Hardness $umber of the wheel%&'.

WARPAGING

The wheels during casting and heat treatment process remains at high temperature. During this high temperature there are chances of wheel undergoing a little bending. The (arpaging (arpaging process includes the balancing of the wheels from which the defects relating to the shape of the wheels can be detected. If the detected defects in the shape like bending of wheels etc are more than the limiting value, the wheels are re"ected. And if defects are minor, they are corrected and used.

PEENING

)eening is a process very similar to steel blasting process. In this process spherical steel particles are made to strike the surface of the wheels at a high velocity. In case there are surface cracks the steel particles strikes the cracked surface at a high velocity, they fill the gap and help to remove the surface defects. *ach wheel undergoes peening process for a minimum of +minute.

HUB BORING

oring is the last operation carried out on a wheel before it is sent to the assembly shop. During hub cutting, the center hole generated is of a smaller diameter when compared to the re-uired diameter, this hole enlarging is done by the oring process. The hole of mm lesser than the a/le%wheel seat diameter is produced during this process. The hole produced has a rough surface finish. Type Ty pe of tool used: S-uare shaped 0arbide Tool. Tool.