Zhejiang Boxing Industry and Trade Co.,Ltd

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Company name:Zhejiang Boxing Industry and Trade Co.,Ltd
Address:No. 1188, Meihe Rd, Jinhua City, Zhejiang Province, 321017, China
Contact:Eric Ge
Website: www.bo-xingcamshaft.com

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Diesel Camshaft High Precision Machining

(1) check the adjustment of the axial clearance

An engine that is axially positioned with a thrust flange is inserted between the front end face of the cam shaft and the thrust flange or between the timing wheel hub end and the thrust flange when the axial clearance is checked , The thickness of the ruler is the Diesel Camshaft axial clearance. Generally 0.10mm, the use of the limit of 0.25mm, such as the gap does not meet the requirements, can be used to reduce the thickness of the thrust flange to adjust.

(2) Diesel Diesel Diesel Diesel Camshaft bending deformation of the maintenance

The bending deformation of the  Diesel Camshaft is measured by the circular round beating error of the journal journal at both ends of the Diesel Camshaft. The inspection method is shown in the figure. Place the Diesel Diesel Diesel Diesel Camshaft on the V-iron, and the V-iron and the dial indicator on the plate so that the dial indicator contacts the vertical contact with the Diesel Camshaft intermediate journal. Turn the Diesel Diesel Diesel Diesel Camshaft to observe the degree of curvature of the dial shaft. After checking, check the results and standard values to determine whether to repair or replace.

(3)Diesel Camshaft other maintenance items

1) Timing gear journal keyway maintenance: timing gear journal keyway symmetrical plane, generally with the first cylinder into the exhaust cam maximum lift symmetry plane coincidence, the wear will make the valve timing changes. After the keyway is worn, the keypad can be re-opened or opened in the new position.

2) the maximum consumption of gasoline pump driven eccentric wear: gasoline pump driven eccentric wear limit is generally 1 mm, more than the limit should generally replace the Diesel Diesel Diesel Diesel Camshaft.

Diameter jumps: standard -0.01 ~ 0.03 mm, limit -0.05 ~ 0.10 mm.

The bending deformation of the Diesel Camshaft can be repaired by the cold pressing method, but it is preferable to change the new part.

3) cam wear maintenance

The wear of the cam causes the valve to change and the maximum lift is reduced, so the maximum lift reduction of the cam is the main basis for the classification of the cam test.

When the cam maximum lift reduction value is greater than 0.40mm or cam surface cumulative wear more than 0.80mm, then replace the Diesel Camshaft; when the cam surface cumulative wear and tear is small 0.80mm, the Diesel Diesel Diesel Diesel Camshaft grinding machine grinding cam.     

However, the modern car engine Diesel Camshaft cams are combined line type, due to high precision machining, high repair costs, so very little repair, the general replacement of the Diesel Camshaft.     

4)Diesel Camshaft journal and bearing maintenance

①Diesel Camshaft journal and bearing maintenance: with a micrometer to measure the Diesel Camshaft journal roundness error and cylindrical error. Diesel Camshaft journal roundness error shall not be greater than 0.015mm, the coaxial coaxial error of each journal shall not exceed 0.05mm. Otherwise it should be repaired.

② Diesel Diesel Diesel Diesel Camshaft bearing maintenance:Diesel Camshaft bearing with the gap exceeds the use of the limit, should replace the new bearings.

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Address:No,1188 , Meihe Rd, Jinhua City, Zhejiang Province , 321017,China





Company Info

ZHEJIANG BO XING INDUSTRY AND TRADE CO., LTD, proformly called “ZHEJIANG SIXING MACHINING CO., LTD”was founded in 1995, is located in Jinhua city, Zhejiang Province.,There are 400 kilometers from Shanghai port , and about 250 kilometers from Ningbo port in distance.
. Our company covers an area about 35000 square meters with total assets about RMB 150 million Yuan, the building area is about 27000 square meters. There are 550 employees, including more than 60 people who are senior and middle level professional persons.
The Company specialized in producing camshafts and balance shafts of car engines, motorcycle engines, general-use gasoline engines, diesel engine. the annual productivity is about 4.5 million pieces. it has a regular organization, which consists of nine functional departments,, a foundry, three machine plants in the company .
Our company has 450 sets of various types of production equipment, such as CNC cam grinding machines,, CNC lathes, CNC hobbing machines, CNC gear shaving machines, CNC cylindrical grinders, CNC milling machines,, automatic washing machine, etc. The equipment number centralized ratio is over 75%, in 2012s, we company purchese one set of auto cam grinder from Toyoda of Japan whose number is GC20M-63 .
It has enough capability for self-supporting the blank of camshafts and cast pieces. The company's foundry is equipped with a vertical-type non-pressure molding line box shot (ZZ416A) and has an annual output

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