Stage of automatic dislocation knife designs numerical control lathe

Dish form bedspring 2.

Piston 3.

Circumgyrate knife stage 4.

Change a tooth-like part of anything dish 5.

Age surely dish 6, 7.

Fixed position board 8.

Ram 9.

Axial gear 10.

Rack of a place of strategic importance 11.

Amortize sells much a tooth-like part of anything dish tabulator has undermentioned characteristic: (Precision of 1) graduation fixed position is tall, can amount to ± 3, , repeat fixed position precision tall, can amount to ± 2, . (2) can be automatic centering. (3) tooth flank wears away to be affected to fixed position precision not quite, as use ceaselessly adjust, locate precision is improved likely, it is good that precision maintains a gender. (4) carrying capacity is strong, fixed position tigidity is good. This knife stage contains rough location board 6, 7, changing a tooth-like part of anything dish 4 in raising a process, axial gear 9 with change a tooth-like part of anything dish 4 inside tine not when clench the teeth, rough location board 6, 7 first not come away, changing a tooth-like part of anything dish 4 inside tine and axial gear after 9 clench the teeth, rough location board 6, 7 complete come away. This are thick fixed position board installs knife clip, arbor in knife stage (the biggest slant carry) in process of knife stage dislocation is being reached below free condition, when treating unexpected power failure, rise to prevent knife stage to had turned or the protective action that does not turn to reach the designated position. In this knife stage in automatic dislocation device, sell through deserving to grind amortize 11 come control and piston rack 10 0 between.

02 ～ 0.

Clearance of damp of 03mm hydraulic pressure, make sure knife platform is rotational and stable, slant in knife stage carry rotate downward in the process, rise to prevent piston rack 10 with axial gear 9 suffer concussion effect, wear away bigger phenomenon happens. The W of computational clamping force of clamping force of 1) of computation of design of 3 knives station should assure to fall to still hold a tooth-like part of anything in working load dish cooperate cheek by jowl. But clamping force should not pass big, can cause tine otherwise dish be out of shape and reduce fixed position precision. Computation of W of the clamping force when tangent is the S in type -- safety factor, take S=1 ～ commonly 1.

5, be like working requirement negative charge of smooth, concussion is small, criterion S takes small cost (the article takes S=1.

3) Pz -- cutting force (Px=Py=0.

5Pz=15000N) Mn ages dish of susceptive torque (Mn=0.

3-Py-0.

23Px=1050N · M) Mr -- tine dish susceptive overturns pitching moment Fr -- age dish of susceptive radial load (inside plane of section of clench the teeth) [Fr=(Px2+Py2]½=20 237N F0 -- age dish of susceptive axial force (F0=Fz=30 000N) R -- age dish of pitch circle radius (R-180mm) β -- tooth form horn (β =60 ° ) ρ -- angle of friction (ρ , the W=47 when tangent.

3kN. Take clamping force W actually to be 50kN, among them clamping force of dish form bedspring is 30kN; Clamping force of clamp oil cylinder is 20kN, use clamp of machinery of dish form bedspring to give priority to, hydraulic pressure clamp is complementary clamp means, assure on the safe side of knife stage clamp. 2) checking computations ages more stress of dish of tooth flank extruding one of crucial parts of this knife stage are much tine dish, its strong performance denies contented design to ask, the fixed position precision that affects this knife station directly and service life. Ij of the σ in aging the computational formula of Ij of dish of σ of stress of tooth flank extruding is type -- stress of tooth flank extruding, n/mm2 Z' -- computational tine is counted (Z'=0.

5Z=0.

5 × 120=60) B -- facewidth (B=25mm) H0 -- the height of clench the teeth of tine (H0=4.

2mm) W -- clamping force, n Ss -- safety factor (take Ss=1.

3) [σ ] Ij -- tooth flank is allowable extruding stress (the extraction with tooth flank hard temper by dipping in water [σ ] Ij=40N/mm2) generation enters numerical value, σ Ij=34.

2(N/mm2)<[σ ] Ij ages more to assure dish fixed position precision and stiffness, to aging the technology below Pan Zunru asks more: Much tine dish material uses 40Cr, d0 of tine ministry nitriding.

The roll flute after 3-600 is machined; Facewidth contact rate is 70% above; Tooth depth contact is height of clench the teeth 85% above; Two tine dish the osculatory tine number when aleatoric position clench the teeth should be in 90% above, contact undesirable tine not to abut. Carry out test and verify through afore-mentioned theoretical calculation and production, construction of this knife station design is reasonable, fixed position precision and stiffness satisfy design requirement. Trying cut " wheel tread " 30kN advocate of cutting force in cutting an experiment again, try cut a success. This machine tool already bound now go up in railroad wheel product line, formal devoted production is used, get the user agrees reputably. The machine tool of profile modeling of two hydraulic pressure that 4 last words produce wheel of the treatment in the line to primary vehicle verticillate undertakes counting accusing to change transforming, in primary machine tool the design increases on vertical tool carrier advocate the 4 labour that cutting force is 30kN stage of automatic dislocation knife, with buy two to contain the turning center look that exchanges knife knife library automatically more undermentioned than having advantage: (1) uses the existing equipment in former wheel product line to undertake counting accusing to change transforming, already managing capital, reduced cost, avoid to create resources waste again. (2) design, make, delivery cycle is short. This knife stage already popularized application to go up at the numerical control machine tool such as CK5116, CK5120, CK5225 now, effect ideal. CNC Milling CNC Machining