The Die Casting of cylinder body of aluminium alloy engine is produced

Use means of cylinder body Die Casting to produce engine cylinder body, can shorten craft course, improve productivity, have clear technical advantage and economic advantage, although this produces means to be put in individual defect, but as level of Die Casting craft rise ceaselessly, people will be overcome ceaselessly, the Die Casting production of cylinder body already made new development trend gradually. Characteristic of cylinder body Die Casting rises increasingly to the requirement that quantifies environmental protection, gently as people, a lot of crucial parts in the car, wait like engine cylinder body, change direction gradually use Die Casting production. Photograph comparing is cast traditionally, die Casting cylinder body has the following advantage: 1. Efficiency is tall. Be in all casting in the method, die Casting is the method with a kind of highest productivity, this basically is by Die Casting the characteristic of the process is decided, and develop further as what produce rate of the mechanization in process, automation and rise. The time that produces a cylinder body is 3min left and right sides commonly, relatively traditional low pressure or the save labour when sand mold casts a province. 2. Precision is tall. Need specific place treatment to be able to be used only. 3. The intensity of cast and exterior hardness are taller. 4. Energy-saving province bad news. General every equipment is annual producible 70 thousand or so. 5. Cover an area of an area little. 6. Craft course is short. Conventional foundry technology, modelling of course of need of cylinder body production, make core, pouring, refrigeration, fall arenaceous, clear, machine try to reach a lot of working procedure such as heat treatment. And Die Casting needs to machine a mould ahead of schedule only, pouring hind very fast cast of cylinder body semifinished product from Die Casting island (an a general designation is Die Casting machine and each peripheral Die Casting island) in take out, or by burr of artificial purify flash, undertake examining later, treatment can. Die Casting also puts in certain defect: 1. Cast blemish more. Because liquid alloy is filled model speed is splitting, model the gas in antrum eliminates completely very hard, often put with stomatic form in staying in cast. Additional, the oxidation be mingled with in process of Die Casting fill, if the design such as bag of collect broken bits is unreasonable, easy remain is in the product is in-house. 2. Die Casting the first time investment is higher. According to statistic, if cylinder body amount of production under 100 thousand, the cost that low Die Casting is built or sand mold casts under Die Casting. Cylinder body style and quantity of platoon of position of Die Casting island are in 2.

The car cylinder body under 0L is commonly list 3 crocks continuously or 4 crocks, and be more than 2.

The cylinder body that 0L platoon measures is straight line possibly crock or 6 V 6 crocks. The graph shows the straight kind that is a car respectively 1 times 3 crock, straight line 4 crock, straight line is mixed 6 crocks the appearance of 6 crocks of V cylinder body. Graph Nextpage of cylinder body of 1 commonly used car is told at present, overall arrangement of general Die Casting island is more complex, and the layout format that does not have a standard. Manufacturer of every Die Casting meets what the experience that produces according to oneself and characteristic put forward a few extraordinary to decorate, go to the lavatory thereby production. The basic peripheral of Die Casting island is as follows commonly: 1. Die Casting machine, tonnage differs from 2200 ～ 4 400t, main by the product umbriferous area and pressure boost pressure are decided. 2. Aluminium alloy melts furnace, or aluminium alloy holding furnace, tonnage is controlled in 2t commonly, by product weight and manufacturing metre decision. 3. Spray equipment, use twin axle spray or robot spray, the layout of nozzle and demand of shower nozzle construction are high, want to be able to assure the quality of spray; The container need of agent of drawing of patterns is enough big, otherwise agent of drawing of patterns is added too frequent. 4. Take a facility, use a robot to take commonly, because number of axle is too little, take a hand simply commonly to cannot satisfy a requirement, and cannot realize automation to move. 5. Wind is cold wear or water-cooling box, decide according to the characteristic of the requirement of different manufacturer, experience and cylinder body. 6. Cut edge engine, use at bag of purify collect broken bits and runner to wait. 7. Cylinder bushing conveyer belt, cylinder bushing serves as set insert to need to use conveyer belt service corresponding position, put a pattern by the robot. 8. Modular lukewarm machine, because cylinder body production is right mould temperature demand is very high, modular lukewarm machine is indispensable. The layout of Die Casting island is OK sundry, the graph is shown 2 times decorate for one model, offer reference only. The manufacturing home of the V of typical overall arrangement of island of graph 2 Die Casting cylinder body has not used the manufacturer that Die Casting method has V cylinder body is produced at present. V engine cylinder body basically is cylinder bushing part it is more difficult to smoke core, others and the cylinder body that list continuously do not have too big distinction. Simpler means of settlement is to be being moved the 3rd pattern plate is added between pattern plate surely, and the pattern plate in calling. Pattern plate is mixed in join with hydraulic pressure between movable mould board. When flying a model, make actuate pattern plate first, smoke core next, the pattern plate in be being opened again next. Fluctuation controls slide block to open later, such OK and successful take out cylinder body from inside the mould. Nextpage graph is shown 3 times produce principle sketch map for some V cylinder body, show a principle according to the place in the graph, the Die Casting that area of and other places of Europe, United States, Korea and country had realized V6 cylinder body is produced. Point of craft of Die Casting of principle of production of graph 3 V cylinder body above all, die Casting of cylinder body of should reasonable design gating system. Normally cylinder body Die Casting gating system has two kinds of forms: Gating system mixes odd side bilateral gating system. Gating system uses odd side at small-sized cylinder body commonly, bilateral gating system is used at large cylinder body commonly. Gating system should notice direction of flow of edge metal fluid is progressively and cut, in order to reduce aeriform be involved in. Tooth form stimulates cold exhaust piece result of exhaust collect broken bits is favorable, obtain use extensively. The ply of tooth form exhaust duct is controlled roughly in 0.

6mm is the following. Cylinder body Die Casting quality is very sensitive to pressing the change that shoots craft parameter. Speed is exorbitant and easy the gas in creating cast increases, too low cause easily fill up undesirable phenomenon. Pressure shoot pressure too low, the blemish such as the stoma in cast, shrinkage cavity increases; Pressure is exorbitant, flash and burr increase, damage to the mould big also. Answer to adjust craft parameter very carefully in Die Casting process, adopt press firing rate suitably to spend, decide reasonable rate changes the position, make model the gas in antrum as far as possible eduction, make leftover gas assumes dispersion distributinging position in cast interior, and section of unapt penetrable cast, form leak. In addition, should notice seasonable pressure boost, in caky before undertake effective squeezing ramming to cast. Actually, cylinder body dimension big, structure large difference of complex, wall is big, select a good craft standard very hard. Normally, of cylinder body Die Casting press firing rate slow to spend control to be in 0.

2m/s left and right sides, press firing rate quickly to spend control to be in 3 ～ 5m/s; Or fill speed control is in 30 ～ 50m/s, pressure is general not under 70MPa. Cylinder body Die Casting is more sensitive to Die Casting temperature. To commonly used alloy, the temperature of metallic fluid wants control to be between 680 ℃ of 640 ～ , the control after the temperature spray of the mould is between 200 ℃ of 150 ～ . Want to use modular lukewarm machine to undertake controlling to mould temperature, actually, modular lukewarm machine already made the indispensable auxiliary equipment in cylinder body Die Casting. Should install enough refrigeration at the same time / heat conduit, assure the effective control of pair of mould temperature. Recommend use independence to enter, means of refrigeration giving water and adjustable, cooling water can press requirement discharge to reach the place with cooling requirement directly, produce cooling effect adequately. Move fixed die difference in temperature cannot pass big, cause cast thermal stress easily to increase otherwise, occurrence craze phenomenon. Additional, agent of drawing of patterns comes to cylinder body Die Casting it is important to be. It is OK that dose of good drawing of patterns is divided outside controlling mould temperature to distributing, still can reduce the attrition force when the model, avoid phenomenon of sticking to mould to happen. It is especially when mould temperature on the high side, what should notice agent of drawing of patterns more is reasonable and use effectively. Besides before outside narrating each element, the quality of alloy fluid also cannot oversight. Answer to note alloy fluid quality adequately, prevent alloy pollution, should undertake gas and fine are handled dividing when necessary. Vacuum method also is cylinder body Die Casting an effective quality assures measure, but can increase additional process. Current, a lot of Die Casting factories did not use vacuum method when producing cylinder body, also can Die Casting gives eligible product. Cylinder body Die Casting blemish basically includes stomatic, shrinkage cavity, cold lie between, crackle and slag inclusion, abiding by craft standard and operation regulation strictly is to control blemish to produce basic measure. The Die Casting of epilogue cylinder body produces the actor drawback that has its oneself, but mix in the technology have clear advantage economically. It can achieve taller productivity not only, and also behave to the whole production process of finished product from material for the shortest. Cast a method to turn to Die Casting law to produce cylinder body of aluminium alloy car to had made trend of a development by the tradition, only a 2008 year, domestic different manufacturer strapped a company to introduce the product line of cylinder body of aluminium alloy engine of level of 7 2 700t by cloth. This shows, scale of production of Die Casting of cylinder body of our country car is in escalate, the level is rising. CNC Milling