缸体机械加工工艺设计

Cylinder block machining process design

Engine parts engine block is a more complex structure of spare parts box, its high precision, com plex process, and the processing quality will affect the overall performance engine, so it has beco me the engine manufacturer's focus parts one. 1.Technical Characteristics of the engine cylinder block

Cylinder cast for a whole structure, and its upper part 4 cylinder mounting hole; cylinder standar d cylinder is divided into upper and lower divisions into two parts; cylinder to the rear of the fron t-side arrangement of the previous three coaxial mounting hole of the camshaft and the idler axl e hole.

Cylinder process features are: the structure of complex shape; processing plane, more than hole s; uneven wall thickness and stiffness is low; processing of high precision typical of box-type proc essing part. The main processing of the surface of cylinder block top surface, the main bearing sid e, cylinder bore, the main and camshaft bearing bore holes and so on, they will directly affect the machining accuracy of the engine assembly precision and performance, mainly rely on precision equipment, industrial fixtures reliability and processing technology to ensure the reasonableness.

2.Engine block process design principles and the basis for

Design Technology program should be to ensure product quality at the same time, give full consi deration to the production cycle, cost and environmental protection; based on the enterprises ab ility to actively adopt advanced process technology and equipment, and constantly enhance their level of technology. Engine block machining process design should follow the following basic prin ciples:

(1) The selection of processing equipment ,the principle of selection adopted the principle of sel ection adopted the principle of combining rigid-flexible, processing each horizontal machining ce nter is located mainly small operations with vertical machining center, the key process a crank hol e, cylinder hole, balancer shaft hole High-speed processing of high-precision horizontal machinin g center, an upper and lower non-critical processes before and after the four-dimensional high-ef ficiency rough milling and have a certain adjustment range of special machine processing; (2) foc us on a key process in principle process the body cylinder bore, crankshaft hole, Balance Shaft hol e surface finishing and the combination of precision milling cylinder head, using a process focuse

d on a setup program to complet

e all processing elements in order to ensure product accuracy Th

e key quality processes to meet the cylinder capacity and the relevant technical requirements; According to the technological characteristics o

f automobile engine cylinder block and the prod uction mandate, the engine block machinin

g automatic production line is composed of horizontal machining center CWK500 and CWK500D machining centers, special milling/boring machine, ver tical machining centers matec-30L and other appliances.

(1) top and bottom, and tile covered only the combination of aperture rough milling machine de dicated to this machine to double-sided horizontal milling machine, using moving table driven par ts, machine tools imported Siemens S7-200PLC system

control, machine control cabinet set up an independent, cutting automate the process is complet ed and two kinds of automatic and adjust the state;

(2) high-speed horizontal machining center machining center can be realized CWK500 the maxi mum flow of wet processing, but because of equipment, automatic BTA treatment system throug