The whorl inside treatment of lathe of ordinary numerical control

The problem raises one of retarber parts spline axis, if the graph is shown 1 times, when initial stage builds product line to make treatment plan, the design divides working procedure to undertake the car of the spare parts, mill and bore attack thread machining with CNC Turning center. Treatment working procedure is bore of → of other one aspect of the matter of vehicle of fine of → of chamfer of mill of → of fine vehicle one aspect of the matter to attack whorl. Graph the product that this product line processes 1 spline rod has spline axis, flange dish reach hollow axis to wait, it is a mixture product line. Produce as a result of earlier design can inferior, because this product line ordered center of a CNC Turning only, and deploy lathe of 3 ordinary numerical control, the following problem discovers in using actually: (1) when by original design plan processes spline rod, two turning working procedure all is finished on CNC Turning center, turning when one aspect of the matter, product line is in stop a line to await condition, productivity is extremely low. (2) the clamping apparatus that uses as a result of two working procedure, cutting tool is different, the need when working procedure switch changes clamping apparatus and cutting tool, need a main shaft clamping apparatus by float 3 claw and float tip change for from centering chuck, and go up as a result of knife tower blade holder amount is limited, need changes partial cutting tool, product line also is in during this stop a line to await condition. (3) on-line lathe of 3 ordinary numerical control is unused. (4) the product that fine vehicle one aspect of the matter is over piles up in CNC Turning center, cause whole product line content to flow not free. 2.

Solution 　 (1) of new plan put forward. Be based on whorl aperture center to be on line of spline axis center, and the center of boring blade holder of tower of knife of numerical control lathe is when X axis direction is mobile pass main shaft center, because this can consider use,change diameter is covered it is broach and tap installation on boring blade holder, use lathe of ordinary numerical control to be opposite the central whorl aperture of spline axis one aspect of the matter attacks thread machining into travel bore. The numerical control system that lathe of 3 ordinary numerical control uses all is FANUC system. In the G code of FANUC system useful the instruction code G74/G83 that circulates at bore, with the instruction code G84 that circulates at attacking whorl. The course experiments, these 3 code can be used at lathe. Make treatment plan afresh to the treatment of this spline axis, in chamfer of one aspect of the matter of the car on CNC Turning center, mill, in the car on lathe of ordinary numerical control another end, bore attacks whorl. (2) the choice of clamping apparatus cutting tool and installation. When other one aspect of the matter of the car on lathe of ordinary numerical control, bore attacks whorl, chosen clamping apparatus is soft 3 claw and end tip. Whorl dimension is M16 × inside 1.

5-7H, when choosing cutting tool, broach chooses the straight power twist drill of diametical 14mm, tap chooses current authority machine to use tap M16 × 1.

5-H3, corresponding diameter uses when installation change diameter is covered secure broach and tap respectively in bore hole on blade holder, if pursue 2, the graph is shown 3 times. Graph graph of installation of 2 twist drill pursues 　 of graph of 3 tap installation (3) machine program. When bore is machined, did not use G74/G83 of instruction of code of bore loop G, use statement of G01 linear interpolation however, this also is bore treatment practicable method of another kind of process designing, program of give typical examples is as follows: M01; (the program suspends dictating optionally, action is main shaft stops roll) 　 　 T0202; (change for 2 cutting tool 2 knives fill, this program broach of correspondence of 2 cutting tool) 　 　 M08; (cutting fluid open) 　 　 M03 S1000; (main shaft is turning, rotate speed 1 000r/min) 　 　 G0 X0.

Z5.

; (fast fixed position arrives coordinate (0.

5) ) 　 　 G01 Z-30.

F0.

1; (cutting tool in Z axis direction linear feed arrives - 30mm, feed speed 0.

1mm/r) 　 　 G04 X1.

; (suspensive feed 1s, smooth full treatment) 　 　 G0 Z50.

(50mm of direction of axis of Z of fast fall back on is in) the program of treatment give typical examples that 　 attacks whorl is as follows, use attack whorl loop G84 to dictate code undertakes process designing: M01; (the program suspends dictating optionally, action is main shaft stops roll) 　 　 T0404; (change for 4 cutting tool 4 knives fill, this program tap of correspondence of 4 cutting tool) 　 　 M08; (cutting fluid open) 　 　 M03; (main shaft is turning) 　 　 G0 Z50.

; (fast fixed position is in to 50mm of Z axis direction) 　 　 X0.

; (fast fixed position is in to 0mm of X axis direction) 　 　 Z5.

; (fast fixed position is in to 5mm of Z axis direction) 　 　 M29 S61; (tigidity studies whorl statement, control the whirl of main shaft and synchronism of Z axis feed, 61r/min of rotate speed of set main shaft) 　 　 G84 X0.

Z-46.

F1.

48; (attack whorl to arrive Z axis direction - 46mm place, pitch is 1.

48mm) 　 　 G0 Z100.

When if be to attack left whorl coming back,noticing, the M03 in wanting a program changes M04. When use G84 dictates, attack whorl to set emplacement to Z axis, main shaft meets him invert exit, the feed speed F=S of main shaft (main shaft rotate speed) × P (pitch) , by the system computation is gotten, the whirl of systematic automata main shaft and Z axis feed are synchronous. About the instruction code G74/G83 that bore circulates, we also did exploration. These two instructions besides outside be used on machining center, also can use on numerical control lathe, g74 instruction suits to be used at carrying deep Kong Zuan to cut more, broach can be installed to answer in bore process cancel an amount. G83 applies to high speed deep Kong Zuan to cut, but center of requirement getting fillet gives water, otherwise broach is answering drop back when fast feed hit a knife easily. 3.

Improve effect spot to use the program above to be to the whorl aperture of spline axis on lathe of ordinary numerical control undertake machining, use result is favorable, complete can contented craft asks. Use this to machine plan, basically be like next advantages: (1) after improving, do not need to stop a line to await, two turning working procedure can undertake at the same time. (2) solved change often the issue with the small efficiency that tool brings. (3) the utilization rate that raised the machine tool on the line, can use a common lathe more, and the machine tool when machining this spare parts won't be unused, can make product line is produced can match, can use at batch bigger production. 4.

The other method of the whorl inside lathe treatment to inside the treatment of whorl, besides use above adoption treatment method, return the treatment method that can use turning whorl, cutting of G32 of instruction of cutting of whorl of journey of the sheet in using G code to dictate for example, whorl dictates cutting of G76, whorl dictates circularly circularly for many times G92, choose appropriate whorl lathe tool to undertake machining. But the whorl inside turning to inside whorl diameter size has restriction, use at commonly inside the case with whorl bigger diameter, here we are not done discuss too much. 5.

This method has epilogue can popularize a gender, similar whorl aperture center is in axial center on-line spare parts, can use this method to machine whorl aperture, and not only confine is in drilling machine perhaps is machined on machining center. Additional, FANUC system is my company uses the most extensive numerical control to control a system, it has instruction of a lot of loops to be able to simplify process designing, realize numerous treatment function, reasonable use these instructions, the manufacturing treatment that can allow us is more efficient, more optimize. In product treatment, how had used existing device, it is economic cost, assure to machine the key of quality, choose handy and sound treatment plan as far as possible, be helpful for those who machine efficiency and treatment quality rising, can reduce manufacturing cost at the same time. Origin: Metallic treatment is online CNC Milling