Full automatic the research of aperture private plane develops CNC boring piston pin

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Summary: What what develop is full automatic what Kong Zhuan of CNC boring piston pin can realize workpiece with the machine tool is automatic go up, next makings and automatic fixed position, clamp, and be in installation, ceaseless machine, not exchange labor below the circumstance, finish piston pin aperture efficiently bore hole, the mouth outside boring, cut back-up ring chamfer, an internal angle and pour quoin. This machine tool already threw production in Shanghai piston factory, obtained favorable treatment result. Keyword: Boring of essence of life; Piston pin aperture; Special machine tool; CNC 1 introductive piston is the crucial part of car engine, the quality of the piston and crop affect the quality of the car and crop directly. Development of industry of our country car is very at present rapid, with car of accept of tower of Shanghai masses mulberry development is exemple, production program was 1994 produce per year 100 thousand, was 150 thousand 1995, amounted to 200 thousand 1996, amounted to 250 thousand 1997, to this century end will amount to 500 thousand. The SGM company that Shanghai builds will be rolled out by 1998 new in high-grade car, such, the demand of the piston will be bigger. Shanghai piston factory is a professional plant that can produce a piston with car form a complete set directly, to produce form a complete set with car of mulberry tower accept, the piston that this factory began to introduce 1000 much dollars from abroad gradually from 80 time metaphase machines crucial and special technological equipment, comprised the first car of our country to use piston product line, dan Jisheng produces ability to be able to be only produce per year 10 ～ form a complete set of car of accept of tower of 200 thousand mulberry serves. Should with produce per year form a complete set of car of 500 thousand Sang Dana to produce a piston, must introduce on the crucial equipment of ten million dollar, this is an enterprise hard susceptive. Make cost to reduce a piston, development our country is advanced production technology, equipment of critical process of development piston treatment is imperative. For this, basis of Shanghai piston factory produced the need of development 1994, offerred imported equipment homebred the tentative plan that change. Through the investigation and study with much half an year, shanghai traffic university and Shanghai piston factory do in Shanghai key, Shanghai Sang Dana car is homebred change Sang Dana car of head office of group of auto industry of the office, Shanghai, Shanghai to tackle key problem below the support of project office, signed full automatic Kong Zhuan of CNC boring piston pin considers to develop an agreement with machine tool collaboration, and was comprised by factory of piston of Shanghai traffic university, Shanghai and factory of concerned machine tool tackle key problem team, made detailed research plan. Fight bravely more through 2 years, full automatic Kong Zhuan of CNC boring piston pin is developed eventually with the machine tool end, threw production at transferring Shanghai piston factory in August 1997. Supervise via quality of product of machine tool of machinist trade department detect of center of central Shanghai cent detect and produce realistic assessment, this plane performance is steady, quality is reliable. Passed the appraisal of machinist trade department and syndicate of head office of Shanghai auto industry in January 1998. 2 by the requirement boring piston pin of treatment spare parts aperture is a more complex process in piston treatment technological process, include to bore hole, the mouth outside boring, cut back-up ring chamfer, pour an internal angle and the treatment that pour 5 place such as quoin. Graph 1 be by diagram of treatment spare parts. Its material is silicon aluminium alloy, treatment dimension asks to be: The diameter that sell aperture is φ 19.

5+0.

050mm, stop buccal end panel is to the space that sells range of the circle inside aperture 19.

24 ± 0. 03mm, diameter of back-up ring chamfer is φ 21.

7+0.

13-0.

05mm, wide for 1.

6+0.

Radius of circular arc of 10mm, bottom land is R0.

8mm, buccal diameter is φ outside 22.

2+0.

Radius of 40mm, circular arc is R0.

5mm, radius of circular arc of an internal angle is R0.

5mm, width is 0.

8+0.

2-0.

1mm, quoin taper is 40 ° ± 10 ′ , sell aperture the span with exterior chamfer of two back-up ring leaves for 60+0.

20mm, the distance is between two quoin 62.

15 ± 0. 2mm, two outside the distance is 65 ± between the mouth 0. 2mm. The position spends a requirement to be: Back-up ring chamfer, outside mouth, quoin asks to be to the symmetry of piston center line 0.

2mm, the verticality between end panel of two an internal angle and line of the center that sell aperture asks to be 100 ∶ 0.

8, back-up ring chamfer beats relative to the radial of line of the center that sell aperture for 0.

1mm, line of the center that sell aperture and piston center line not in all face, meantime is apart from for 1.

2 ± 0.

75mm. All these treatment requirements are to be in installation, ceaseless machine, not exchange labor below the circumstance, one-time treatment ends will assure. Graph 1 by diagram of treatment spare parts the characteristic that piston of principle of job of 3 machine tools machines is batch precision of big, treatment asks metre of tall, production is fast, automation degree stability of tall, treatment is close friends. Be aimed at these characteristics, what if the graph is shown 2 times,this task designed is full automatic Kong Zhuan of CNC boring piston pin uses a machine tool (the gear that air cylinder of the D in the graph and E air cylinder drive searchs what the orgnaization aims O1 place to wait for treatment piston is hind, g and F air cylinder aim O2 place to wait for the forehead that machines a piston and hind) respectively. Whole platform machine tool fastens all, prejudicial orgnaization, knife by lathe bed, main shaft the composition such as system of orgnaization of makings of platoon, automatic fluctuation, pneumatic, numerical control and servo. Its introduce respectively below much knife of automatic fluctuation makings and numerical control principle of double prejudicial boring. Graph 2 full automatic Kong Zhuan of CNC boring piston pin uses machine tool sketch map 1.

Next makings chamfer 2, 3.

Servo electric machinery 4.

Main shaft electric machinery 5.

Main shaft 6.

Prejudicial cover 7.

Manipulator 8.

The knife is discharged 9.

Expect on groove 10.

Console 3.

1 full automatic fluctuation makings is full automatic fluctuation makings orgnaization is had detect automatically, breakdown is diagnosed and warning function, be implementation big batch, fast metre and automation treatment is crucial. It can raise the labor productivity, harmonious sex that reduces the labor intensity, consistency that assures to machine precision and automation product line. Its job process is as follows: By on line working procedure (full automatic piston of CNC fine vehicle stops a special machine tool) the piston of automatic input stores going up makings chamfer 9 in, after impaction crock A is loose, next the piston is automatic rolling, to block makings crock till B is held off (block the distance between makings crock B and impaction crock A to be able to accommodate) of a piston only; Subsequently impaction crock A regains impaction position, prevent the piston from the back next rolling; Block makings crock B to loosen then, the piston rolls V model piece in, block restoration of makings crock B; Later, push makings crock D to drive a piston to enter manipulator 7 in; Search right now crock E rotational piston, undertake directional search; Search hind, restoration of air cylinder of D, E; Go up next makings crock C manipulator 7 push stop to fixed position component a front; G of very close crock drives a piston to enter stop mouth in, very close; Go up subsequently restoration of makings crock C; Begin to machine then. Machining while, a, B, D and movement of E air cylinder, make on makings preparation, can decrease so on makings is auxiliary time. After treatment ends, g of very close air cylinder is loosened, discharge crock F drives a piston from stop mouth get shot piece, glide through oriented lever discharge. Through numerical control system and PLC control the system finishs the harmony of above movement, and behavioral dependability depends on completely the function of pneumatic system. 3.

Much knife of 2 numerical control principle of double prejudicial boring because the piston is big batch production, consequently need has efficient treatment facilities and sound treatment technology. Numerical control technology and online detect the technology is implementation efficient, flexible the crucial technology that automation manufactures. And the opposite concentration of working procedure, be helpful for reducing workpiece to install a number, avoid mounting error, reduce machine tool and tool amount, decrease cover an area of area and auxiliary time, reduce breakdown probability at the same time, raise treatment precision. For this, this machine tool uses numerical control much knife technology of double prejudicial boring, install in, do not change a knife platoon, ceaseless machine, not exchange labor below the circumstance, realized piston pin aperture, outside what chamfer of mouth, annulus, inside and outside pours wine cup is efficient full automatic treatment. If the graph is shown 1 times, cent of piston pin aperture is 2 paragraphs or so, every paragraphs of aperture has 5 treatment place, namely outside mouth, outside horn, annul chamfer of aperture, annulus and inside pour wine cup. Numerical control much knife technology of double prejudicial boring is to be below the premise that makes sure coaxial spends a requirement, use numerical control technology and prejudicial orgnaization, control head of two main shaft to undertake machining at the same time. Head of every main shaft is discharged of a knife, every knife platoon made up 5 cutting tool, finish respectively bore hole, the mouth outside boring, cut back-up ring chamfer, pour an internal angle and the treatment that pour 5 place such as quoin. Its job principle shows 2 times like the graph: Main shaft electric machinery passes leather belt dish drive main shaft along with prejudicial rotate drive axis, shaft coupling, prejudicial set, eccentric shafe and knife platoon rotate together decide cutting moves, prejudicial a central line and main shaft rotate there is one offset E1 between central line, knife platoon has one offset E2 again between line of installing hole center and line of eccentric shafe center, general design becomes E1 ＝ E2. When initiative position, line of knife platoon center and main shaft rotate central line coincide. When prejudicial rotate drive axis adopts shaft coupling drive prejudicial the eccentric shafe in covering and secure the knife platoon on its to rotate when 180 ° , line of knife platoon center and main shaft rotate the distance between central line is E1 ＋ E2. And when knife platoon returns 0 ° , line of knife platoon center and main shaft rotate central line coincide. According to the treatment requirement of the piston, in the knife platoon semmetry contains respectively locally bore hole knife of knife, the mouth outside boring and grooving, an internal angle, pour quoin knife. Above all, in the knife platoon center line and main shaft rotate the mouth outside the aperture inside the boring when central line coincide and boring, boring arrives after dimension, servo electric machinery 3 drive direction of rotation of main shaft of eccentric shafe edge to rotate, as a result of prejudicial action, bore hole radial of edge of knife of the mouth outside knife and boring retreats a knife, and the others 3 knives (grooving knife, pour quoin knife and pour knife of an internal angle) criterion along radial feed, finish cut back-up ring chamfer, pour quoin and the job that pour an internal angle. Axial feed by servo electric machinery 2 drive ball guide screw deputy reach linear slideway to come true, the speed that basically finishs the feed that bore hole and main shaft box and withdraw a motion quickly. Such, install in, do not change a knife platoon, ceaseless machine, not exchange labor below the circumstance, realized piston pin aperture the efficient and automatic treatment of 5 place. System of control of 4 machine tools is full automatic the control system that Kong Zhuan of CNC boring piston pin uses a machine tool is main change the composition such as the system compatibly by numerical control system, servo. Numerical control and servo introduce the product of company of German Xi Menzi, by electric machinery of power source of drive of system of 810M numerical control, 611-AIRF, main shaft, communication servo feed electric machinery is mixed the composition such as servo drive module. System of 810M numerical control is what cut treatment machine tool with Yu Xi is compact model CNC controls a system, wait for composition by face plate of CNC, PLC, operation, monitor. Among them the control center that CNC is whole platform machine tool, can undertake numerical control process designing through it. In machining a process, CNC receives position of concerned machine tool and state information, control a machine tool to finish according to needing to issue all sorts of statements at the same time expect an action. PLC(but controller of process designing logic) compositive in CNC controller interior, it is the interface between CNC and machine tool, loading the information exchange between them, control machine tool from go up automatically the execution of all sorts of makings, auxiliary movements arrives to play the behavioral circuit such as makings automatically, realize the sequence control of the machine tool. PLC uses STEP5 language process designing, usable " the statement is expressed " , " control system flow chart " or " echelon pursues " method of 3 kinds of expression will write. Main shaft electric machinery used pair of fast electric machinery of Xi Menzi, will change rotate speed through Y- Δ switch, through leather belt dish drive main shaft along with prejudicial rotate drive axis, shaft coupling, prejudicial set, eccentric shafe and knife platoon rotate together decide cutting moves. The drive of 4 servo axis used module of SIMODRIVE611-A servo drive to reach its to communicate servo electric machinery, the synchronous and linear feed that the information that servo drive module basically issues according to CNC controls or so boring cutter and prejudicial feed. Mix of speed coder inside servo electric machinery positional coder, facilitate the feed that controls cutting tool accurately. Pneumatic system uses a powerful person that German FESTO company produces, air cylinder and sensor to wait, consolidate management by PLC, have the characteristic that reliable, function stabilizes the movement. The main characteristic of 5 machine tools (1) is fiducial and unified, have automatic fixed position and automatic impaction function. Can be in below the installation, ceaseless machine, condition that does not change knife platoon, efficient, realize piston pin aperture automatically bore hole, the mouth outside boring, cut back-up ring chamfer, pour an internal angle and the treatment that pour 5 place such as quoin. Fiducial and unified can reduce installation frequency, mounting error and installation time, economic tool clamping apparatus and machine tool cover an area of an area, reduce breakdown probability at the same time, raise treatment precision. (2) uses main shaft of double head, double prejudicial, much knife is all and structure of symmetrical servo drive, can realize the opposite concentration of working procedure, raise a machine tool to machine precision. (3) is had detect automatically, what breakdown calls the police is full automatic fluctuation makings orgnaization. It is implementation big batch, fast metre and automation treatment is crucial, can raise the labor productivity, harmonious sex that reduces the labor intensity, consistency that assures to machine precision and automation product line. (4) has tall stability and dependability, operation easy, maintenance is convenient pneumatic, electric with numerical control system. As above, all pneumatic, electric yuan of parts of an apparatus with numerical control system the product that is the company with the at present good reputation on international. Consequently reliable, function stabilizes quality, interchangeability is good. Whole platform machine tool reflected machine, report, gas, PLC adequately to dominate the organic union of technology and numerical control technology, it is advanced the representative application of production technology. Afore-mentioned special machine tools realize 6 conclusion of piston pin aperture full automatic turn treatment. Be in installation, ceaseless machine, not exchange labor below the circumstance, from on makings, treatment arrives next makings are full automatic finish. This machine tool already threw production in Shanghai piston factory, and already mixed on one full automatic piston of CNC fine vehicle stops special machine tool connects the mouth together, implementation connects line automation production. Supervise via quality of product of machine tool of machinist trade department detect of center of central Shanghai cent detect and produce assessment actually, the each function index of the machine tool all achieved design requirement, treatment metre is: Every piston handling time is little at 20 seconds. CNC Milling CNC Machining