Numerical control engine bed classification and characteristic

The numerical control engine bed has very many kinds; From the great kind of on minute, has the special-purpose numerical control engine bed, has the general numerical control engine bed; Plants the minute from the finished goods, has the processing shell class numerical control milling machine, the processing center, has the processing axis class numerical control lathe, the turning center, the cam numerical control grinder and so on; From the processing control request the minute, has the single axle numerical control the numerical control 砂带 buffing machine, some five linkages numerical control gear cutter, the numerical control hob rub; From the control complexity the minute, has the simple numerical control, has the multichannel numerical control; From the drive type the minute, has a step of 进电 motive, has the direct current servo motor, has the exchange synchronization servo motor, has the exchange asynchronous servo motor, has the straight line electric motor; From the main axle drive type the minute, has the direct current main axle electric motor, has the exchange main axle electric motor, has the alternating current main axle; From the position feedback way the minute, has the entire closed loop feedback, some half closed loop feedback, has open-loop control and so on.

The numerical control engine bed good flexible. high adjustment, the processing precision are high, is already paid attention by the automobile manufacturer, the 60's start to march the automobile spare part realm of production. Is high as a result of its cost, the system function and the efficiency are not ideal, but has not always obtained the widespread application. Enters the for 1990s, is following market competition intensifying; The multi- varieties production maximum limit satisfies the market the diverse need, until satisfies each user the need, becomes goal which the automobile manufacturer pursues, take the numerical control engine bed as the main body flexible manufacture unit, is massively used. Now the numerical control engine bed prioritize direction has two:

The high speed numerical control engine bed, achieves the high efficiency by the high velocity. The present international standard is main axle rotational speed <= 25000rpm, adds, reduces speed <= 2.5g, rapid traverse <= 160m/min, must achieve this new level, the numerical control engine bed actuation, the mechanical drive, the mechanism, the cutting tool all must have the very big improvement. The engine bed main axle must use the electricity main axle, the main bearing generally uses the ceramic bearing, the difficulty is cooling, the lubrication, service life general 20,000h. Actuates generally to use the straight line electrical machinery 加线guide rail (also useful static pressure guide rail), 90m/min, 1g engine bed also useful 大螺�double ball bearing lead screw pre- 张紧 plan double servo motor-driven. The mechanism generally uses the frame box type structure. The cutting tool uses the high degree of hardness high heat-resisting cutting tool, the hilt uses HSK to the handle.

Or is the special purpose machine numerical control solves flexible and the high efficiency contradiction by the numerical control engine bed special plane. At present, the European and American automobile production mostly uses the agile production system which is composed by the high speed processing center, this kind of system may 100% flexible interflow multi- varieties production, be called as the island -like by many flexibility processing unit to be composed, each island which connects the engine bed is composed by many similar engine beds and the manipulator, uses the belt electron reservoir carries on along with the tray and the engine bed the exchange of information. The worth noting was these equipment suppliers not only has grasped the appropriation technology which the equipment made, moreover all extremely took the automobile manufacture technical process the development, they could provide to the user hand over the key project, had own system development ability. The engine bed reliable target is extremely advanced, the single plane start rate reaches above 98%. Uses this kind of production system, the automobile manufacturer new product industrialization delivery cycle greatly reduces.

After more than 20 years reform and open policy, in the domestic automobile spare part manufacture domain, the numerical control engine bed use is more and more widespread. But mostly is from Europe, beautiful, the date import engine bed, the European and American date engine bed characteristic is: Reliability good, the failure rate is low; The man-machine contact surface design takes the human nature; Has surveys and compensates the system on own initiative; May provide on the belt automatic yummy treats installment processing unit; Engine bed design modulation. But domestically produced numerical control engine bed factory although many, but looked from the variety, still was the low level general numerical control lathe more, regarding suits the mass motor car engine, the gear box, the chassis main spare part multiple spindle numerical control processing center, the variety are few, and mostly has not undergone the mass production test.

Application situation and insufficiency

In the recent 20 years, our country engine bed design modelling has obtained a bigger development, if the static state looked the engine bed contour, cannot see the big difference with the overseas similar product, but, must adapt the mass automobile spare part production, needs the engine bed to have the high reliability. The influence engine bed reliability mainly has two aspects, is the engine bed design quality; Another the processing and the assembly process quality which is the engine bed part and always becomes; In a sense, the process quality is bigger to the engine bed reliable influence. But the domestic engine bed manufacturer all quite takes the product design quality, generally adopts the joint capital or adopts the imitation overseas product. But affected the bigger manufacture process quality regarding the engine bed reliability to neglect. The result was our some factories prototype has completed many years, sold engine bed small question unceasing, failure rate high, or the precision could not achieve the contract requirement, the service missed, the user degree of satisfaction was extremely low. Therefore, the development product forms the economic efficiency, achieved the scale sales volume are not many. I want to emphasize am; The value process quality control, the standard manufacture craft, the quality monitoring, continues to the product quality to improve, is obtains the redundant reliable engine bed the premise. Moreover, but also must establish and the international advanced engine bed factory synchronization engine bed design manufacture standard, at the beginning of the 80's, our country introduced has permitted forces 惠勒 company's special plane to make the partial standards, through the digestion absorption, has produced like the east wind equipment factory, the Dalian machine tool factory and so on the domestic quite outstanding combination special plane and from the generatrix production enterprise. But, during introduction technology, we does not have the immediate impetus technology innovation, not through introduction establishment integrity technical standard, and maintenance synchronization development. Finally the western nation carries on the equipment update when the beginning of the 90's develops to the numerical control flexibility equipment, we also in for raise the special plane manufacture level to spend the manpower and the physical resource. At present the domestically produced numerical control engine bed merchant mostly adopts the strategy is and the overseas joint capital either the cooperation introduces some kind of or some several kind of types, cannot form the series product, causes the automobile spare part to produce the factory deficient selectivity; Today automobile manufacturer in order to reduce the cost, reduces the development deadline, hands over the key project to the industrialization implementation, but the domestically produced supplier lacks the automobile spare part manufacture craft development ability, they mostly deficiently provide the important motor car engine spare part agile manufacture system like cylinder body, the cylinder cover; Crank, Lian Gang; The cam shaft components entire line experience, lacks the auxiliary engine development necessary ability and the system on-line designed capacity.

View and suggestion

In order to large-scale cause the domestically produced numerical control engine bed to enter the automotive industry as soon as possible, I thought the domestically produced numerical control engine bed manufacturer responds the strength to sharpen own ability, mainly has following several aspects:

Must establish own automobile spare part the manufacture craft ability, in view of automobile spare part manufacture request development product. Gradually forms serialized, the modular numerical control engine bed product, satisfies the automobile spare part manufacture production the need.

Must take my line equipment the development (feedway, tray and so on), the numerical control engine bed manufacturer takes the automobile spare part processing line main engine supplier, not only must take the main engine the design manufacture, but also must highly take to constitute the modern agile flexible unit various essential factors development, like manipulator, feedway and so on. Because these installments reliability have affected the production line start rate. But the start rate regarding the large scale production automobile industry is count for much.

Has the entire line auxiliary engine the necessary ability. Because hands over the key project the request, took that, once the contractor also wanted to pay attention establishes the oneself entire line contract project the long-term partner like special-purpose clearer and so on, because, the supplementary equipment manufacturer ability also affected the entire line to continue the ability.

Sharpens the entire line automation designed capacity, the modern automobile spare part manufacture entered the agile production time, the automation information system design is reasonable or not, has decided the production system normal operation. It is the high tech technology in the automobile spare part manufacture aspect application. Is the modern numerical control engine bed system supplier's core competitive ability is at.

Establishes the effective user question feedback mechanism; Sets up the user supreme idea, establishes the fast service system; The automobile production is the large quantities of mass productions, must be prompt to the production equipment maintenance and the service. The prompt effective service strengthened the enterprise competitive ability; Simultaneously advantageous engine bed product quality improvement enhancement.

The value engine bed reliability design, the engine bed reliability mainly by the reliable machine tool construction system guarantee, must take to make the process the quality control; The guarantee manufacture process uniformity regarding the engine bed manufacturing industry is very important.

Using opening and with international contact advantageous opportunity; Absorption digestion, establishment and international synchronized engine bed standard.

The value and the numerical control system factory exchange cooperation, at the right moment develops has the oneself intellectual property rights the numerical control system, this numerical control system should be open style, can maximum limit meet the automobile spare part manufacture needs.

Establishes the reliable machine tool construction system, abides by the contract, takes the date of delivery.

Conclusion

At the Chinese eighth session of international engine bed exposition, some one batch of domestically produced equipment factory has already displayed own new product, like the east wind plant production PM400II high speed processing center, Dalian hundred million reaches Japan to be even, factory display the and so on Shenyang numerical control processing center quite suitable engine gear box shell class components processing, the Nanjing two engine beds, Chongqing machine tool factory production numerical control this skill machine, the numerical control gear shaper, the numerical control 剃齿machine suits the gear box gear tooth profile processing, but also had the very many other numerical controls engine bed factory also all to display the very many numerical controls engine bed product. Believes the domestically produced numerical control engine bed manufacturer so long as truly sets up take the user as the central market idea, persisted continues to improve the thought, completely has the ability to make satisfies the automobile manufacture production request the high grade standard numerical control engine bed and the flexible manufacture system, the domestic automobile manufacturer completely used we numerical control engine bed system Lian Chuangchan the automobile 指日 to be possible to hold.