Transform common lathe to machine complex screw

Express 1A paragraph B paragraph C paragraph lead (1:7 of taper of ministry of Mm)636048 whorl root81:571:40 several 221 length (Mm)220241345 comes back right axis of right right screw is the key that some presses a facility, the taper of the lead of grain of Duan Luo of its A, B, C3 and root ministry is different, main parameter sees a table 1. The treatment that has axis of screw of 3 kinds of 3 kinds of lead, taper in the implementation on CA6140 machine tool is transformed main purpose. 1 advocate motion advocate the roll that motion is cutting tool. This second transforming a design is the dial of part of tool carrier of CA6140 machine tool, will small procrastinate board reach tool carrier discharge to drop, procrastinate in the horizontal stroke board above the milling head that mount proper motion designs, wheelhead or arenaceous belt grinding device, can realize the thick, essence of workpiece and smooth full treatment. The feed of machine tool of 2 feed motion moves to basically have: The circumferential feed of workpiece (the roll of workpiece) , the fore-and-aft feed of cutting tool (the implementation of screw lead) reach transverse feed (the implementation) of screw taper. Graph case of feed of 1 CA6140 machine tool is basic the circumferential feed motion of workpiece of diagram of group transmission system is machined screw supports circumferential feed motion by tip of clamp of chuck of CA6140 machine tool, rear push frame, its rotate speed is 1r/min. Because rotate speed of main shaft lowest is 10r/min, because this is in machine tool advocate electromotor with main shaft box increased to fall between leather belt annulus speed ratio is the reducer of 2 class gear of 10. The lead that the fore-and-aft feed motion of the cutting tool of fore-and-aft feed motion of cutting tool wants to satisfy workpiece comes true, namely workpiece turns 1 turn cutting tool must advance equably a lead, because this is fore-and-aft,feed must be driven by guide screw. In the 3 lead value that asks in workpiece, CA6140 machine tool can realize 48mm only, and 63mm and 60mm cannot come true however. Compare via a few kinds of plan, decide the tine of main group gear in adjusting feed box is counted, specific specification is as follows. The transmission system of main group in box of feed of CA6140 machine tool is shown 1 times like the graph, if the parameter of each gear expresses 2 to show. Adjustment principle is the sort of commonly used and metric whorl that does not affect CA6140 machine tool to be able to be machined as far as possible. And U radical =Z1/Z9=19/14=9.

5/7 is mixed U radical =Z5/Z11=26/28 was not used in two metriccer than be in to transmission thread machining, because this choice adjusts the tine number of Z5, Z1, Z9. Digital-to-analogue of watch 2Z1Z2Z3Z4Z5Z6Z7Z8Z9Z10Z11Z12 tine counts modification coeffication 193.

750.

16203.

75-0.

349362.

25-0.

465332.

251.

124262.

251.

124282.

250362-0.

713221.

5143.

750.

159212.

250282.

2502820.

Metric whorl calculates 244CA6140 machine tool type is S=7u enlarge U radical U times (in 1) type: S -- enlarge of U of workpiece whorl lead, U radical, U times -- when enlarging the group, main group, drive that adds times groups to be 60mm than the lead that should be machined, u enlarge =16, times =1/2 of U, reason U base =7.

5/7=30/28. the graph the tine of 1 medium gear Z5 counts instead 30, modulus is changeless, with respect to the treatment that can realize lead 60mm. Because center of Ⅱ of axial Ⅰ axis is apart from,be 63 ± 0.

05mm, because this changes the gear Z5 after,must undertake changing. Classics computation, the modification coeffication of gear Z5(30) is - 0.

8496. Manage together, when the 63mm that be by treatment lead, according to type (1) has U radical =9/8=18/16. Will pursue 1 in the tine of gear Z1 counts instead 18, modulus still is 3.

75, modification coeffication is - 0.

19, the tine of Z9 counts instead 16, modulus still is 3.

75, modification coeffication is 0. The center of the gear after checking computations is adjusted is apart from an error, all be less than former blueprint to tag tolerancepublic errand (± 0.

05mm) , can realize the treatment of 3 kinds of lead so. (A)(b)1.

Transverse feed joy stick 2.

Split nut control lever shaft 3.

Fore-and-aft feed joy stick pursues 2 eliminate split nut and graph of principle of lock of each other of transverse motor-driven feed because the transverse feed of cutting tool of graph of system of transmission of treatment of taper of ministry of root of 3 implementation whorl is had by ministry of root of treatment screw tooth form taper requirement, because this is in,cutting tool implementation must make transverse feed motion at the same time, this is driven with respect to need feed rod smooth the orgnaization of transverse motor-driven feed inside board box. As a result of split nut of CA6140 machine tool and motor-driven feed vertical, transverse be each other lock, the each other that must eliminate split nut and handle of transverse motor-driven feed so locks up a function. Particular way is shown 2 times like the graph, graph A states split nut closes, feed of vertical, horizontal motor-driven cannot come true. Will the take out of double shadow part of 2, if graph B place is shown, close in split nut so while, transverse feed joy stick 1 can turn, make transverse feed also is able to come true thereby. Graph the 3 transmission systems that are part of taper of ministry of implementation whorl root pursue (sneak away formerly elliptically the) of fore-and-aft feed part in board box, the taper gear-box that share of the right in the graph is in lathe bed rear to go up to secure. Transmission line is: Guide screw (gear-box of T=12mm) → taper (U awl) M1(of → of 32/56 of → of 36/32 of → of → feed rod surmounts clutch) → M2(safe clutch) small guide screw of transverse feed of 40/48(of → 4/29 → or → of 59/18 of → of 48/48 of → of M3 of 40/30 → 30/48) → (T=5mm) . So, guide screw turns 1 turn, 12=12mm of × of vertical =1 of fore-and-aft feed F, × of awl of U of × of horizontal =1 of transverse feed F (36/32) × (32/56) × (4/29) × (40/48) × (48/48) × (59/18) × 5=1.

211u awl Mm. Because taper =2f is horizontal / F even if, realize 3 kinds of taper so: 1:78, 1:57, 1:40, the drive of taper gear-box is U awl ={u1 than U awl, u2, u3}={0.

0635, 0.

087, 0.

1238} , if gear parameter expresses 3 to show. Taper error sees a table 4. Digital-to-analogue of watch 3Z13Z14Z15Z16Z17Z18Z19Z20Z21Z22 tine counts modification coeffication 36201820182054202921.

11920.

89622420462050203920 watches 4 theoretical values are worth opposite error actually (%)1:781:571:401:78.

231:56.

981:39.

980.

294-0.

039-0.

054 because transverse feed motion is,drive feed rod to come true by guide screw, the silk in box of feed of machine tool of the CA6140 when working accordingly, feed rod changes clutch to should make guide screw puts through. To make sure the strict drive between vertical, horizontal feed is compared, smooth the drive that attrition relies on to pass motion in board box deputy surmount clutch (M1) and safe clutch (M2) should try to secure, in order to make sure drive of the instantaneous in treatment process changes than happening. Additional, adjust the relative position of workpiece and cutting tool to facilitate, the odd handle clutch operation in taper gear-box should set position of an empty shelves. CNC Milling