Camshaft grinding machine is electric reach grinding technology design

Overview camshaft grinder can divide camshaft grinder to rely on to grind grinder, numerical control to rely on 3 kinds big to grind grinder of grinder, full numerical control to be not numerical control. Among them difficulty of technology of grinder of full numerical control is the greatest, but its biggest advantage is grinding precision stability of quality of tall, product, product changes efficiency of agile and convenient, production is tall. At present home already began to use system of numerical control of Xi Menzi 840C to realize grinder of cam of full numerical control make or technical reformation. 1.

Camshaft of camshaft brief introduction is a crucial fundamental part the car to, it is installed within engine, those who control air cylinder enter gas and exhaust, an air cylinder takes gas and control of an exhaust cam by, apply extensively at gasoline engine and derv engine, wait like autocycle, car, train, lorry. Every camshaft is by a certain number of cam composition, be like 4 crocks of engine, a camshaft is comprised by 8 cam. Its appearance is every cam peach form, by base garden and 2 a lot of curves, 3 times curve and circular arc are comprised, its form close the curve is called generate a curve. The line that makes a curve error will affect quality of combustion of the fuel inside engine air cylinder directly, affect engine character of service then. Refer to accessory 1 product figure. The car that every camshaft wants to pass pair of semifinished product, mill, auger, kibble, essence is ground wait for ability of more than 20 working procedure to finish. Camshaft grinder finishs camshaft namely the last working procedure: Kibble, essence grinds every cam on camshaft. Camshaft grinding machine controls with FN3 total number here (next weighing FN3 grinder) it is a specification. 2.

FN3 grinder summarizes FN3 grinder to be produced by company of former Germany FORTUNA, its model is FN3 - DS350 ／ 1000.

Share of FN3 grinder machinery is worn by machine tool body, workbench, head, build and repair of emery wheel of rear push frame, main shaft, emery wheel implement, the component composition such as hydraulic pressure system, cooling system, dynamic balancing system. Electric part is comprised by the component such as detector of measuring instrument of numerical control system, imitate drive system, MARPOSS, ultrasonic. 3.

Grinder of FN3 of grinder technology index is main technical index: X axis journey (linear) 0-300 millimeter, speed 10 meters / cent.

Z axis journey (linear) 0-1000 millimeter, speed 10 meters / cent.

C axis journey (rotate) 0 - 360 degrees, rotate speed 200 turn / cent.

500-2000 of rotate speed of King Kong annulus of 　 of cent of ／ of rice of 35-60 of linear velocity of main shaft emery wheel turns / cent.

Numerical control system configures numerical control system to be had not only is the substantial with indispensable grinder of compositive numerical control, it passes the drive system, accurate grinding that measures a system to complete pair of work, auxiliary to grinder component or equipment undertake monitoring. FN3 grinder controls camshaft grinding machine for total number, the monitoring that system of demand numerical control has detector of measuring instrument of pair of imitate drive systems, hydraulic pressure system, cooling system, dynamic balancing appearance, MARPOSS, ultrasonic to wait not only, more important is to have function of cam curve grinding, ensure the each technology index of camshaft satisfies design requirement. System of numerical control of Xi Menzi 840C can satisfy the requirement of grinder of camshaft of full numerical control completely. Main reason is it has interpolation of electronic gear axis, sharp list, curve to express function of function of timing of axis of interpolation, C. Its configuration basically is as follows: · hardware configures: Choose frame of 840C12 chamfer lead plane to include MMC CPU board, NC CPU board, PLC CPU board, accuse board reach DMP module to wait, work station chooses monitor, machine tool to control clavier; · software configuration: OS system software chooses DRDOSV6. 0 edition, numerical control software chooses V6. 02 edition () of blame exit edition; · options configures: Interpolation of electronic gear, sharp list, curvilinear watch interpolation. 3.

The purpose that electrical system of design of FN3 grinder electrical system designs is grinder machinery share and electric part organic ground union rises, make grinding treatment becomes high accuracy, efficient, of on the safe side full automatic turn production. Electrical system design includes hardware, system to debug on the whole, software 3 much. The principle that · hardware designs is to be below the conditional premise of contented grinding function, reduce cost; The principle that · system debugs is the 840C system the standard accord with character of FN3 grinder job through adjusting what relevant parameter makes; The principle that · software designs is to use structured programming, to every component run the dynamic control that should have on the safe side, have rich information directive. 1.

Electrical system hardware designs NC hardware to design the design that basically is numerical control axis. The numerical control axis of this machining center has X, Z, C, S1, S2 5. PLC hardware design basically is the design that points to circuit of pair of monitoring of exterior executive component. It includes machine tool Control Panel, machine tool to assist the electrical system such as detector of measuring instrument of system of Control Panel, drive, hydraulic pressure system, cooling system, dynamic balancing appearance, MARPOSS, ultrasonic, these electric signal want the DMP module with 840C (IO module) join. 2.

Electrical system debugs electrical system is the accords with FN3 camshaft grinder job demand that system of good to configuration numerical control hardware has the adjustment of relevant parameter makes. Basically include data of NC machine tool and data of PLC machine tool to adjust. 2.

1Data of NC machine tool adjusts data of NC machine tool basically is FN3 grinder the setting of each axis parameter. Its key parameter is as follows: · installs FN3 grinder to have 2 axis of 3 a group of a fashion, passageway, feed, main shaft; · defines interface of annulus of buy of everybody of 3 feed axis (instruction mouth and measure a mouth) , interface of annulus of speed of 2 main shaft (instruction mouth) ; · installs 3 feed axis countable accuse parameter, if positional equivalent value, academic career is worth; · installs character of motion of 3 feed axis accuse parameter, wait for parameter like speed of positional gain, acceleration, axis. The rigid structure of athletic character of the axis and grinder, wear away degree have close relationship. Of the axis accusing parameter is the athletic character according to the axis comes set. The trends that positional gain of the axis is position of movement of the countershaft in reflecting positional link dogs characteristic. Positional acceleration of the axis is report set rate and set rate are started to arrive in the axis in positional annulus during stopping, the acceleration of athletic position, decelerate is characteristic. Axial speed can reflect the work efficiency that gives grinding machine, rate is older, efficiency is taller. It is divided commonly move rapid rate, hand to use rate for the oldest rate, hand, answer 0 speed to wait. Gain of buy of position of axle and acceleration also are interact. 2.

2The adjustment of data of PLC machine tool data of PLC machine tool is adjusted basically is address of set IO module. Address of module of FN3 grinder IO uses standard setting, direct by set of data of PLC machine tool. FN3 grinder configured 3 DMPL child station, every DMPL child the station can install 4 inputs module, 4 output module. 3.

Electric control software designs electric control software basically is the design that points to PLC program. In PLC system, designed interface module of the standard for the user, namely OB piece, outside dividing OB piece, still have the FB that suffers OB piece to call, PLB, SB, DB, FX, DX piece. User control software is written in these piece in, weave with language of Xi Menzi STEPL5 and it is become. In controlling software originally, OB piece uses OB20 and OB1 only, the work out of other program block according to control object function, use structured process designing. Basically finish: Basic signal of · of 　 of 　 of program of · initialization processing handles an order (axis of the channel that includes a machine tool to control clavier, NC system, feed, emery wheel, axial spacing signal, axis answers reference point to stop processing signal, urgently) electric machinery of asynchronous of 　 　 · handles an order (include cooling fluid. Safe protection system is having very main effect in grinder. The life of its the first guardian is safe, the 2nd prevent device damage. 4.

Because cam makes curvilinear specialty,FN3 grinding craft is designed, it is not garden already also not be linear, decided the characteristic of craft of camshaft grinder grinding. Offer grinding machine generating a curve is 0 - 360 degrees disperse dot, how does numerical control system use these disperse sites, grinding gives the work that accords with a requirement, need to solve the following 3 crucial questions: · disperse dot becomes close continuously curve. Can use 840C curve to express a function to come true. · generates a curve to turn for grinding curve. As a result of cam grinding when, grinding dot and generate a dot to be not nodded in on, must undertake mathematical model alternates, and this kind of commutation returns the measurement with cam means is concerned. · builds curve of C axis timing. In this cam grinding, to make sure cam acceleration is constant, must build the timing curve that will adjust C axis rotate speed according to C axis angle. All grinding craft and crucial question are finished by NC grinding machine program. FN3 grinding machine program is the relevant function that provides according to cam grinding process and 840C weave and become, basically include cam to generate / speed-distance curve computation and cam grinding 2 parts. 1.

Cam is generated / cam of program of speed-distance curve computation is generated / speed-distance curve computation will be given the grinding curve that cam generates watch changeover to be used for grinding () of value of C coordinate value, X axis coordinate. Basically include the following shares: · cam generates L900 of program of computation of curve, speed-distance curve. It calls L100, L200, L981, l982, L983, L984, L988; · definition generates the first cam to generate a curve to express L100. The builds every curvilinear watch, cam space that gives out according to product blueprint, phase angle, base garden diameter is written into this program; · definition generates speed-distance curve of the first cam to express L200; · computation cam 1, 3, 5, 7 generate curvilinear L981. Make curvilinear list according to L100, will generate curvilinear changeover to be grinding curve, 840C undertakes to these data flowing processing is formed close curve, use at grinding treatment to see figure below; · computation cam 2, 4, 6, 8 generate curvilinear L982. The principle is the same as L981; · computation cam 1, 3, 5, L983 of 7 timing curve. According to watch of L200 speed-distance curve, 840C undertakes to these data flowing processing is formed close curve, use at grinding treatment; Its timing graph is as follows: · computation cam 2, 4, 6, L984 of 8 timing curve. The principle is the same as L983; · computation generates curvilinear L988. The function is to will generate curvilinear changeover to be grinding curve. 2.

Program of the grinding in treatment of cam of cam grinding parameter should involve a lot of relevant parameter, will assure product quality. If speed of grinding quantity, grinding is worth, if the choice is undeserved,can cause workpiece to be out of shape, dimension out of tolerance. These parameter basically have the following kinds big: Cam of 　 of · workpiece parameter 1 - 8 positions parameter, cam 1 - measurement technique of parameter of 8 angle parameter, radius of cam radical garden, cam. Width of diameter of emery wheel of 　 of parameter of · emery wheel, emery wheel. King Kong of 　 of parameter of · nap emery wheel annulus feed position, speed, long grind a quantity, long grind a frequency to wait. Quantity of position of feed of emery wheel of 　 of · grinding parameter, speed, kibble, half essence grinds quantity, essence to grind axis of quantity, C compensation of each rotate speed, cam. These parameter are fixed a little, some undertake adjustment according to grinding effect. 3.

Main program of grinding of cam of cam grinding program by ％ 20 finish. It is called generate nap of L23 of grinding of 8 computational L900, cam, emery wheel. L25. Every call grinding a camshaft. Cam grinding subprogram is finished by L23. It includes cam angle setting, kibble, half essence to grind, essence of life is ground etc, every call grinding a cam. Subprogram of emery wheel nap is finished by L25. Every call nap emery wheel. Because grinding program is more, main program ％ gives out only here the ministry block of 20 is as follows: 　 of %MPF20 　 ... computation of 　 　 L900 generates curvilinear 　 　 ... 　 of 　 of emery wheel of nap of 　 　 L25 P1... .

Axis of N0120 G90 G1 F=R24 Z=-R1 R712=R11 R9=0Z grinds 　 of 　 of the first cam to N0140 L23 P1 of 　 of 　 of buy of position of wheel of the first protruding... axis of 　 　 N0220 G90 G1 F=R24 Z=-R2 R712=R12 R9=1 Z arrives L23 P1 of 　 of 　 of position of the 2nd cam grinds 　 of 　 of the 2nd cam... axis of 　 　 N0320 G90 G1 F=R24 Z=-R3 R712=R13 R9=0 Z arrives the 3rd protruding.

Axis of N0420 G90 G1 F=R24 Z=-R4 R712=R14 R9=1 Z grinds 　 of 　 of emery wheel of nap of L25 P1 of 　 of 　 of the 4th cam to N0440 L22 P1 of 　 of 　 of N0430 R150=R64/2 of 　 of 　 of position of the 4th cam... .

Axis of N0520 G90 G1 F=R24 Z=-R5 R712=R15 R9=0Z grinds 　 of 　 of the 5th cam to N0540 L23 P1 of 　 of 　 of buy of position of wheel of the 5th protruding... axis of 　 　 N0620 G90 G1 F=R24 Z=-R6 R712=R16 R9=1Z arrives N0640 L23 P1 of 　 of 　 of position of the 6th cam grinds 　 of 　 of the 6th cam... axis of 　 　 N0720 G90 G1 F=R24 Z=-R7 R712=R17 R9=0 Z arrives the 7th protruding.

Actual grinding effect uses FN3 grinding machine the FN3 cam grinder of Xi Menzi 840C, after via debugging grinding to go out one generates value and the cam with exterior eligible surface roughness, machine 400 continuously, sampling observation 10 ％ , check systematic dependability and stability. Each technology index accords with examination result completely products plan requirement. This equipment was checked and accept on June 30, 2000, and consign user, now still in use, producing huge effect. CNC Milling