135 model aperture of tappet of valve of diesel engine airframe machines modular machine tool

8, cylinder spends allow to differ for 0.

011, tappet aperture is relative to the verticality allow difference of camshaft aperture H 0.

04/100, and reach crankshaft aperture Q with H of K of air cylinder aperture, camshaft aperture have positional precision demand. Because tappet hole depth enters airframe interior, and bore diameter is small, treatment is quite difficult. This airframe asks year of production 7000, two control production, odd treatment pitch time is 30 minutes. 2 tappet aperture machines airframe of graph 1 135 diesel engine craft because diameter of spiracle tappet aperture precision of small, dimension low, bottom outlet is surface roughness of tall, surface the characteristic such as casting aperture, use thick boring, half essence boring, bore with a reamer to squeeze 3 working procedure to machine. Thick boring working procedure basically excises major mental allowance; What half essence boring can correct bottom outlet is prejudicial with linearity, in order to assure the positional precision of aperture, the treatment condition with squeeze creation better to issue bore with a reamer of a working procedure; Bore with a reamer squeezes working procedure to achieve final dimension precision and surface roughness requirement. The craft parameter of each working procedure sees a table 1. Express material of cutting tool of content of process of order of working procedure of 1 craft parameter to machine dimension Mm YG837 of thick boring of Mm/min1 of feed of R/min of rotate speed of cutting tool of M/min of speed of cutting of mental allowance Mm.

755 ～ YG639 of boring of 635295742 half essence.

752504001003 bore with a reamer squeeze YG639.

9940.

030.

240.

0486530 to make the machine tool is satisfied at the same time 4135 model diesel engine airframe the treatment requirement of aperture of 4 crocks of 8 tappet, will 6135 model 12 tappet aperture divides airframe in 3 to be versed in on treatment, every are versed in a treatment 4, simplified already so machine tool structure, reduced advocate transmission power, enlarged the size range of pipe bent of the machine tool again, improved the adaptability of the machine tool. The total position of the machine tool of overall design program of 3 machine tools (2) seeing a picture is vertical 4 labour bore hole type of modular machine tool, designed thick boring, half essence boring, bore with a reamer to pack 3 modular machine tool, its structure is basic and identical, distinction depends on the rotate speed of main shaft box, power and cutting tool merely, bore with a reamer squeezes a machine tool to deserve to have cooling system. The machine tool chooses SEHY 400/1250 4 work hydraulic pressure shuttle table serves as be versed in a changeover and essence decide dynamical component, in the clamping device on workbench mesa. On pillar configuration has slip of HY32/630 hydraulic pressure and 1TD32 headstock, use case of transmission main shaft, make aperture machine the motivation of feed, slip of 2 hydraulic pressure deserves to have station of special hydraulic pressure. Machine tool general power: Modular machine tool is thick boring 7kW, half essence boring and bore with a reamer squeeze modular machine tool to be 5kW; Height of machine tool feed a machine: 800mm; Dimension of outline of lead plane appearance is 3500 × 1716 × 3698mm; Suttle 9t. 1.

Lathe bed pillar 2.

Clamping apparatus 3.

Cutting tool 4.

Mobile pattern plate 5.

Hydraulic pressure system 6.

Electronic-controlled system 7.

Main shaft box 8.

Cooling system 9.

Lubricant system 10.

Dynamical component pursues layout of 2 machine tools pursues the main part cutting tool of 4 machine tools presses 3 cutting tool program of technology of tappet aperture treatment, the machine tool configured the special cutting tool that the graph shows 3 times. Graph 3 in 1 sign an undertaking for boring cutter of thick boring, half essence compose, use double knife head hard alloy boring cutter piece, thick boring comes F37.

75, cut deep 2 ～ 3; Half essence boring comes F39.

75, cut deep 1; What arbor uses oily channel is cylindrical oriented. 2 pack compound cutting tool for bore with a reamer, the cylinder that cutting tool upside is oily channel is oriented; Mid the straight chamfer that has look of tooth of bore with a reamer to leave is oriented; Reamer dimension is F39.

99, cut deep 0.

12, front squeezes a knife to do not have blade bore with a reamer, squeeze Kong Zhi F40.

026, crowded opening surplus is 0.

04. Because tappet hole depth enters airframe interior to amount to 412mm, bore diameter is small, arbor slightness tigidity is poor, increase the stability of man-hour to rise, used fluctuation two stationary are oriented device. The clamping apparatus form that at present the factory uses most diesel engine is clamping apparatus: Aperture of two when workpiece reachs F face to go up with F face special technology locates (graph 1) , fall to bring to bear on up oneself clamping force, the fixed position that relies on F face closely in lower part of upper cover of frame type clamping apparatus piece go up, realize fixed position clamp. Cutting tool in order to be inserted in camshaft aperture (direct in H) on the axis oriented set those who reach clamping apparatus upper cover to go up is oriented set oriented. Choose and employ persons is versed in or orgnaization of drawing of special hydraulic pressure is inserted unplug oriented axis. Form of this kind of clamping apparatus puts in the following blemish: Use frame type clamping apparatus, airframe from flank pass in and out, installation, the observation when treatment, measure inconvenience. Way of clamping force and cutting force, machine weight force is opposite, what need clamp muscularity, the stability of fixed position clamp is poor. Frame type clamping apparatus and oriented axis are inserted unplug orgnaization of hydraulic pressure drawing complex, giant, cost is high. In this machine tool clamping apparatus airframe is mixed with E face 1# , 6# the fixed position of K of air cylinder aperture with two farthermost apart. Graph 2 in, in clamping apparatus base 21 go up, of plane fixed position piece and two fixed position are sold 22, 23, install workpiece with reliable ground, in two fixed position markets intermediate design hydraulic pressure pull-down is furcate pressing plate workpiece of 24 direct clamp, clamping apparatus installation moves workbench mesa to go up in 4 worker displacement. Oriented axis 25 by advocate bracket 26 with deputy bracket 27 prop up, axial fixed position, installation is in the camshaft aperture H of airframe. Advocate bracket is located in on clamping apparatus base, the design has fixed position of essence of oriented axis axial to insert inside unplug awl sells an orgnaization; Deputy bracket secures the slide carriage in shuttle table to go up. When workbench and clamping apparatus are mobile, oriented axis can be inserted automatically or pull out airframe camshaft aperture. The bellwether that the setting regards cutting tool as in the guide-post bushing on oriented axis to, rely on closely to machine place, of cutting tool hind oriented decorate in suspension the mobile pattern plate at lower part of main shaft box 4 on. Two fixed position on the pattern plate of relative position support of pattern plate and clamping apparatus are covered and 4 28 fixed position that go up sell clamping apparatus wallboard of 29 cooperate to decide, these 4 fixed position sell two two span equal, corresponding at 3 working station. The characteristic of this clamping apparatus is: The installation of facilitating workpiece of total unenclosed construction and detect. The clamping force of the workpiece when treatment and cutting force, gravitational direction is consistent, because work is more serious (318kg) , what require clamping force so small, and installation is reliable. Use E face and fixed position of opening of 2 air cylinder, make the design of tappet aperture standard with fixed position fiducial, assemble fiducial coincide, be helpful for increasing opening is treatment precision and assemble precision. Clamping apparatus structure is simple, cost is low, the operation is convenient, can realize the semi-automatic loop that machines a process. The control of 5 machine tools and setting of working loop machine tool have station of special hydraulic pressure and electric control cabinet, for convenient operation, still configured pushbutton station. Electric, hydraulic pressure system is controlled by PLC program controller, make PLC report, fluid automation system. The system has a hand to move / automata function, working program can be pressed when the hand is moved operate step by step carry out; If the graph is shown 4 times,job of automata machine tool circulates. Graph airframe of circular chart of job of 4 machine tools is versed in in I an installation, dot of shuttle table of → of fixed position clamp moves speed to be versed in to Ⅳ , direct in mobile process axis (core club) hand of oriented axis of the → inside the camshaft aperture that inserts airframe automatically moves plug axial to locate → presses shuttle table of → of automatic loop pushbutton is retreated quickly, delay is retreated be versed in to Ⅱ the headstock on pillar of → of a fixed position, clamp begins the work, main shaft rotates ordinal speed, labour enters slip of → vertical hydraulic pressure, retreat quickly, finish a Kong Jia to be versed in the job circulates, the treatment → shuttle table of 4 tappet aperture loosens → shuttle table ordinal be versed in in Ⅲ , Ⅳ a fixed position clamp, the Kong Jia that finish is versed in the job circulates, treatment goes out additional → of 8 tappet aperture is versed in in Ⅳ a hand move dial oriented axis to locate awl sells dot of → shuttle table to move retreat quickly be versed in to Ⅰ , in be being retreated quickly, direct the axis exits airframe automatically, prop up in advocate, the → on deputy bracket loosens airframe of airframe → debus. Site of production of user of classics of this modular machine tool assesses the applied effect of 6 machine tools, precision of geometry of test machine tool accords with JB3045-82 to get boring kind standard of precision of modular machine tool; Machine airframe, precision of size of hole of actual measurement tappet, form precision and surface roughness all achieve product blueprint requirement, treatment quality is stable and reliable. Machine tool construction is reasonable, automatic job loop is stable and reliable, the operation is handy, reduced labor intensity of the worker greatly. Machine tool productivity is tall, actual measurement is simple handling time is 27min, achieve two to make the work, year 7000 batch produces treatment airframe requirement. CNC Milling