Have the application of the horizontal machining center of U axis function

  • Time:
  • Click:141
  • source:YIGAN CNC Machining
1 preface is in the development process of horizontal machining center, axis of common X, Y, Z cooperates main shaft to had satisfied the requirement of modern treatment very hard, in the light of muti_function the requirement that reachs compound treatment, people developed axis of B, W, U and each axis linkage again in order to realize compound treatment. The author shows to undertake discussion with respect to the application of the treatment that make a rod only. The industry such as power facilities is reached in car of machine of hydraulic pressure pneumatic, project, petro-chemical equipment, car, engine in, with axle housing, difference fast implement the spare parts of housing pump housing and type of form of a powerful person is main treatment object. This kind of spare parts is in treatment of use horizontal machining center, because characteristic of its oneself structure reachs the special requirement to machining means, main existence has following problem: One of, the coaxial opening that this kind of spare parts has many internal diameter to differ is and coaxial spends a requirement tall; Secondly, some pump housing and system of a powerful person are very expensive to its sealing requirement; As a result of,return additionally other all sorts of reasons, make the treatment of this kind of spare parts often counts private plane. Contradict to solve these, tool manufacturer rolled out the cutting tool that has U axis function. This kind of cutting tool deserves to CNC controls unit and join of machine tool servo (concerned technology agreement needs to discuss) with machine tool manufacturer beforehand, deserve additionally to join axis completes drive. Achieve U axis and Z axis linkage with this, can complete the treatment such as whorl of face of taper hole, R, car. Choose the probe that match to be able to undertake be metricaled automatically, automatic treatment, raise treatment precision, this method increases U axis function to be able to satisfy a requirement temporarily to common horizontal machining center. But, in using a process actually. The cutting tool that has U axis function puts in following and insufficient place: (The join of the servo unit of 1) cutting tool and driving unit and the systematic function that install pair of machine tools and rigid structure space have special demand; (2) oneself structure is flimsier, do not apply to puissant heavy cut; (3) is big to bore diameter difference or treatment of treatment content distinguishing, still need to use the cutting tool of function of many U axis, because this is special cutting tool, the price is higher, so very wasteful. The ironwork of 2 new have diarrhoea of Japan of horizontal machining center that have U axis (the BFN series that NIGATA) development produces is complex horizontal machining center gifted the idea with traditional horizontal new machining center, function of its U axis solved afore-mentioned different not just model treatment problem, also reduced cutting tool to use a measure greatly to common treatment at the same time, raise cutting tool compositive change. Its are main the characteristic is: U axis unit installs main shaft of Yu Gaogang sex to carry a department directly, driving unit comes true through drive of the gear of main shaft interior, rack, make the tigidity of U axis rises greatly; U axis journey is 50mm, the biggest bore hole the diameter can amount to 300mm; Knife handle form is knife handle of double contact of the short awl of 1/10, end panel, apply to high accuracy puissant heavy cut; Use system of refrigeration of distinctive U axis, maintain synchronous circumgyrate with U axis, enhance edge refrigeration result; Deserve to special process designing assists software (SNAP3) , simplify, optimize process designing and program to debug; Have additionally explore automatically, compensation system regards a choice as the function (the blame inside machine changes knife type) , finish automatically " aperture of rough machining → measures → U axis automatically to compensate → finish machining automatically " whole process. Cite brief example now (see a picture) the treatment technology that compares BFN compound machining center and traditional machining center: Cutting tool of compound machining center of BFN of traditional machining center: 14 cutting tool; 4 (need 1 additionally to explore a head) 1.

Ø52 thick boring; 1.

Ø42 ～ Ø68 reachs end panel rough machining; 2.

Half essence of Ø52 boring; 2.

Finish machining of Ø42 ～ Ø68; 3.

Ø52 essence boring; 3.

Ø98 finish machining; 4.

Ø68 thick boring; 4.

Finish machining of each end panel: 5.

Half essence of Ø68 boring 6.

Ø68 essence chamber 7.

The circle outside Ø98 and end panel thick, semifinishing machining; 8.

Boring of essence of the circle outside Ø98; 9.

Ø42 thick boring; 1O.

Half essence of Ø42 boring; 11.

Ø42 essence boring; 12.

Ø64 thick boring; 13.

Half essence of Ø64 boring; 14.

Ø64 essence boring. Only compound machining center of this visible, BFN reduces cutting tool amount and auxiliary time greatly, reflected its the character of compound treatment. Treatment exemple pursues in afore-mentioned a lot of characteristics, the work out of the program when use U axis is machined and debug most as close as relation of the person that use, and program of more general CNC Machining has distinction. The special process designing of NIGATA assists software (SNAP3) weaves with the form of grand program, rely on grand program to carry out implement call, raise a program to call speed to release an user again already grand program can use a space. Its are specific the function includes: Internal diameter treatment: G66.

1P8001; External diameter treatment: G66.

1P8002; Rough machining of end panel V aperture: G65 P8003; End panel V Kong Jingjia is versed in: G65 P8004; End panel of a flight of stairs is machined; G66.

1P8005; End panel of a flight of stairs machines reversely: G66.

1P8005; Outside thread machining: G117 M332; Inside thread machining: G117 M333; Outside awl thread machining: G117 M336; Inner cone thread machining: G117 M335; U axis coordinate fastens set function; Left compensation of round horn of cutting tool point of a knife: G66.

1P8041; Right compensation of round horn of cutting tool point of a knife: G66.

1P8042; Buy of U position of axle compensates a function: G101. The user uses machine program of SNAP3 work out, need according to to machine the vertical section of outline only, give out coordinate of each inflection point is worth can, grand process arranges treatment labor situation automatically, reduce computational quantity and mistake. Conversely, if configure U axis function only and support without similar software, work out machine program will be very trival job. Additional, user but according to practical experience, the cutting parameter that adjusts a few grand parameter to adjust cutting to be versed in pace allocation reachs every labour stage in order to reach ideal precision and size. The problem of 3 existence uses U axis to machine, the influence of centrifugal force is inevitable (even if machine tool has a balance to deserve to weigh orgnaization) . NIGATA designed buy of G101-U position of axle technically to compensate a function for this. But, the centrifugal force when main shaft circumgyrate, suffer cutting tool weight, length, slewing speed, the element such as cutting position is affected and make an indeterminate amount. The author thinks according to using experience actually, only support " buy of G101-U position of axle compensates a function " it is insufficient, need tries to 2 cut, according to cutting data, change cutting tool compensates a value in order to reach target size. These experience compensate a value to be able to serve as his database, need in order to have in the future. Stem from the consideration of centrifugal force likewise, the slewing speed of highest main shaft when the machine tool is used to U axis gives install forcibly, (Can be worth new setting through revising parameter of course, but stem from safe consideration, do not recommend. ) so, the data that processes to needing high speed (for example: Aluminous material) , treatment effect is not quite ideal. The place on put together is narrated, no matter the horizontal machining center that has U axis function still improves treatment from different workpiece treatment efficiency, reduce finished cost to go up, it is a kind of type that deserves promotion. But at the same time, this kind of compound machining center reachs software support to go up to still have in rigid structure what perfect further is necessary. CNC Milling CNC Machining