Large dish design of kind of facilities of treatment of spare parts turning

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  • source:WEINBERG CNC Machining
Summary: Use Yu Chao to a kind large dish facilities of circumferential turning treatment made kind of part abecedarian research, characteristic of the working principle to equipment, treatment, advocate transmission system made brief analysis and specification. This treatment facilities structure is simple, facilitate make, carry, install and adjust, can satisfy general treatment need. The large disc that it can use in equipment of large water and electricity, cement, chemical industry kind the treatment of the spare parts. Foreword generally speaking, the disc with not quite big diameter kind the spare parts can be in medium or small the treatment on vertical lathe, if the diameter of the spare parts is very big, the large disc that in be like equipment of large water and electricity, cement, chemical industry, uses (annulus) kind spare parts, sometimes its external diameter can amount to 10 ～ 15m, this is used with respect to need exceed large machine tool to perhaps design appropriative to machine equipment to undertake machining to its. As we have learned, the vertical lathe of diameter of the 10m in the large company that is in our country already very infrequent, our country's at present biggest vertical lathe is the 15m vertical lathe that Germany produces, and the treatment facilities that does not have what maturity almost in the spare parts treatment of 15m above to the diameter. Important is, because the spare parts exceeds constant dimension and weight, to carry and assemble and unassemble it is difficult to brought huge. Accordingly, need develops a kind of simple, practical, cost the low, circumferential turning that facilitates carriage treatment facilities installs the spot to complete this kind of part to the product machines the task. The design that overview of 1 treatment facilities designs a thought to machine equipment originally and common turning treatment machine tool are different, we can make workpiece is secured, the dimension that adjusts cutting tool to workpiece surface place to need makes whirligig around the geometrical center of workpiece, every rotate feed of 1 week of axial is apart from certainly, progressively treatment gives the whole and circumferential appearance of workpiece. Such, in cutting dosage not big case falls, needs electric machinery power is very little, the power that it consumes basically is the force that takes cutting obstruction and equipment oneself with Yu Ke. It is to be able to have circumferential cutting and speed change only to machining the requirement of equipment. Such treatment facilities structure is simple, come true easily. Installation of facilities of design requirement treatment is on an arm that can circle workpiece geometry center to rotate, arm designs stretch form.

Tool carrier can move to be apart from certainly along the axial of workpiece, so that machine the axial ply of a workpiece.

Have but the drive of gearshift walks device, assure to machine equipment to rotate equably along circumferential direction.

Tool carrier can make minim hand move shift in slideway, install be in can circumgyrate is certain on the disc of angle, in order to satisfy the need of treatment cone. The composition of system of treatment of plan of equipment transmission system and the main transmission system that working principle processes equipment are like right plan institute to show, 1 exceed large disc workpiece for what be machined, its radius R can be in 4m above, ply is 50 ～ 150mm, many plank solders for material or joining together and into common carbon steel: 2 for slewing ring, wait for composition by bearing of chassis, arbor, tapered roller, kong Lian receives the technology that attends its and work with bolt and setting is in the geometrical center of workpiece locally: For arm, wait to solder and be become by U profiled bar, I-steel, with bolt close solid is in slewing ring on bearing outer lane, a certain number of scroll can be installed below arm chassis annulus frame (a) was not drawn in right graph, use at supporting right end the arm of cantilever wears and gear-box 6: Advocate motion by double fast electric machinery, through Ⅰ - two pairs of of Ⅱ axis fixed gear (20/28) , Ⅱ - the gear of two pairs of slippage of Ⅲ axis (37/53, 30/60) , Ⅲ - the gear of two pairs of slippage of Ⅳ axis (44/32, 20/56) , repass Ⅳ - of Ⅴ axis register round of form fall fast part (20/40, 25/35, 30/30) , finally by 1 pair of leather belt annulus (15, 16) drive (Ø120: Ø180) provides motion and power drive axis Ⅵ . Drive axis shares 10 kinds of different rotate speed (30 ～ 660r/min) , pass drive wheel 14(outer for wear-resisting balata material) in workpiece apparently motion, the force that overcomes facilities of cutting obstruction, whole treatment and attrition obstruction undertake circular motion, be like the diametical make choice of of drive wheel, cutting tool can get corresponding cutting rate, in order to get used to the need of different treatment condition. The cutting feed system of equipment is inside and outside two, use at machining round cylinder of inside and outside respectively. They by feed tool carrier 8, guide screw nut 9, handwheel 10, rotary table 11, the knife is placed 12, the composition such as lathe tool. Knife clip outfit is on rotary table, after the scale that gets on rotary table has been adjusted and tightening its solid with bolt, can machine the round cylinder of workpiece or taper seat. Because machine 1 turn to just need axial feed to be apart from certainly, want to realize automatic feed to compare difficulty, the axial measure that considers treatment is not large, can use a person to labour hand moves fixed feed or use intermittent delay to enter orgnaization feed. The set of the rotate speed of axis of athletic concern drive of 2 treatment facilities is installed considering what machine equipment and debug convenient, the bulk of its drive part and weight should not be too big, because what this chooses the power of pair of fast electric machinery,be 3/4.

5kW, rotate speed is 710/1440r/min. Advocate Ⅰ of → of {1440710} of electric machinery of athletic transmission line (<DIV s throw, so the size of cutting force basically is measured by back penetration of a cutting tool and cutting speed decides. The cutting powermeter when cutting power and turning of power of cutting of computation of electric machinery power calculates formula to if take V=0,be Pc=Fc · Vc(5) .

88m/s(namely N drive =120r/min) , can get: Pc=3550 × 0.

88=3124(W)=3.

The driving force that 1(kW) considers this to machine equipment should overcome feed to fight gravity of force, equipment and attrition resistance, desirable Pm=1.

2Pc(6) by type (6) can get: Pm=1.

2 × 3.

1=3.

Power of 72(kW) electric machinery considers formulary PE=Pm(kW)h(7) type medium by electric machinery powermeter: H is the overall efficiency that machines equipment, take H=0.

9. Can get: PE=3.

72=4.

13(kW)0.

9 actually, when rotate speed is 120r/min, electric machinery power is 4.

5kW(1440r/min) , can satisfy the treatment need when cutting dosage is not quite big completely. To increase driving force, machine double drive of the rear wheel before equipment can be used, drive axis is two, every have two wheel on root axis, in of side to be covered for nothing annulus, have bearing effect only, outboard is drive wheel, fixed go up in drive axis, drive machines circular motion of equipment edge workpiece. The element such as the coefficient of friction of the amount of obstruction of feed of the weight of the power of the size of driving force and electric machinery, equipment, cutting, drive wheel and width, drive wheel and workpiece is concerned, integrated consideration answers when the design. This treatment facilities can is opposite of the spare parts outside, inside columnar face has thick precision work, still can be opposite circumferential around go up pour horn, cant, groove to wait undertake machining. The structural design that machines equipment originally and general accuracy machine tool are identical, because length place is restricted, here no longer give uncecessary details. The treatment of the circumferential face that the facilities of this kind of treatment of article introduction basically uses 4 last words at exceeding big diameter disc or cirque part, do not need special treatment machine tool, cost is low, treatment method is simple and feasible, install and adjust of equipment more convenient also. Especially to a few exceed the disc that carries largely hard kind when the spare parts undertakes machining, but adjust measures to local conditions, treatment of on the spot, treatment cycle is short, can contented general outside round treatment need. Additional, the structure of this treatment facilities is very simple also, common machinery plant all can be produced by oneself and make. CNC Milling