The numerical control of nut of the stainless steel that take a shoulder is machined many times

If the base of nut of stainless steel of shoulder of treatment characteristic belt of the nut that take a shoulder pursues 1 is shown, it is the part with my company larger production lot, annual yield has 10 000 many. But volume of this kind of spare parts is shorter than lesser, handling time. Handlers needs again and again to hold clip when be machined on common center lathe, the auxiliary time that brings about treatment increases, labor intensity is increased, treatment efficiency is low. To can make machine efficiency rises and labor intensity is reduced, improve treatment craft to undertake machining on numerical control lathe. 2.

Craft improves common center lathe to machine the craft of this kind of nut that take a shoulder to be as follows: ① gets the materials ready, shift is simple. The circle outside ② car end panel, car, bore, pour horn to reach cut off. Face of other one aspect of the matter of ③ tune car comes overall length, horn, attack whorl. From above craft can see, common center lathe produces a such workpiece to need to hold clip twice, working procedure is multifarious, efficiency is inferior. Improve treatment technology, the process that completes on common center lathe transplanting arrives on numerical control lathe, if the graph is shown 2 times, craft of numerical control car is: ① gets the materials ready, shift is simple. ② whole appearance, length, end panel reachs horn to finish. ③ benchwork is used stand auger attack whorl. The advantage with the biggest lathe of numerical control of 　 of graph 2 is installing clip to be able to complete the treatment of 3 workpiece at every time, and attack lathe whorl to hand in finish through vertical drilling machine by benchwork. Can see from this, new technology can increase production really efficiency, reduce production cost and reduce labor intensity. 3.

CNC Machining of 　 of CNC Machining 　 is this second craft is improved most the content of core, basically be to numerical control process designing undertook optimizing. Instruction M00 was applied to suspend M98 of function, instruction transferring subprogram function when process designing, using coordinate of workpiece of fixed position of G54, G55, G56 is a function, achieve the goal of many treatment. CNC Machining cent is the following processes: (1) hold clip. The logical way that hold clip must choose before process designing, because be good stuff falls,feed formula is machined, the 3 claw that clamping apparatus takes oneself with respect to choice lathe from centering chuck. If the graph is shown 3 times,fit clip pattern, good stuff should extend 3 claw to grow from the 70mm outside centering chuck foot (this is main program G54G0019Z0.

The position of 2, next semifinished product end panel relies on to make the same score cutting tool clamp to hold clip fiducial can) . Graph 3 outfit place means 　 (2) numerical control process designing. Process designing uses a main program to add the method that calls a subprogram to realize many treatment. Above all, needing set workpiece coordinate is. The set that workpiece coordinate fastens is shown 4 times like the graph. Workpiece coordinate fastens the origin of G54 to be X0 Z0, use at the treatment of the first product. Workpiece coordinate fastens the origin of G55 to be X0 Z-20.

6, use at the treatment of the 2nd product. Workpiece coordinate fastens the origin of G56 to be X0Z-41.

3, use at processing the 3rd product. Graph the set that 4 workpiece coordinate fastens writes CNC Machining program namely next. Cent of CNC Machining program is two parts: ① main program, main function is workpiece extends length to be opposite department of coordinate of workpiece of knife, time-out, choice and call a subprogram. ② subprogram, main function is outline of appearance of individual spare parts, inside the aperture, treatment that pours wine cup. Program code is as follows. Main program: O0176 (program name) N2 T0101 of 　 of 　 of 　 　 N1 G99 (outside round knife is right knife) 　 　 N3 G54 G00 X19 Z0.

N4 M00 of 　 of 2 　 (time-out) O0176 (program name) N1 G99N2 T0101 (outside round knife is right knife) N3 G54 G00 X19 Z0.

2N4 M00 (time-out) N5 G00 X100N6 M00 (time-out) subprogram of N7 G54 M98 P0175N8 G55 M98 P0175N9 G56 M98 P0175N10 M30: O0175 (program name) N1 G99N2 T0101 (outside round knife) N3 M03 S800N4 M08N5 G00 X30N6 Z0N7 G01 X5 F0.

2N8 X1 F0.

1N9 X-2 F0.

05N10 G00 X24N11 G01 Z-14 F0.

2N12 X25N13 G00 Z0N14 G01 Z-1.

5X22 F0.

15N15 Z-14 F0.

25N16 X24.

5N17 Z-14.

9X26N18 Z-21N19 G00 X100N20 Z200N21 T0303 (bore) N22 M03 S300N23 G00 X0N24 Z2N25 G01 Z-3 F0.

1N26 G74 R0.

5N27 G74 Z-22 Q8000 F0.

1N28 G00 Z200N29 T0202 (knife pouring wine cup) N30 M03 S500N31 G00 X12N32 Z1N33 G01 Z-1 F0.

1N34 G00 Z300N35 T0404 (cut off a knife) N36 M03 S800N37 G00 X28N38 Z-20N39 G01 X25 F0.

05N40 X26N41 Z-19N42 X25 Z-20N43 X10N44 G00 X100N45 Z200N46 M05N47 M09N48 T0101N49 M99 (3) to the knife. It is the crucial step of CNC Machining to the knife, decide the quality of the product directly to the exact extent of the knife. The obligate length when holding clip is 70mm, actually this length is not to measure come out. This is main program G54G0019Z0.

The position of 2, specific implementation method is process designing of the first workpiece origin is adjusted for (X0, z70) . Press the key that start when handlers, the main program moves, the machine tool runs sudden shift to coordinate is G54 (X19, z0.

2) , the program pauses, at this moment cutting tool is apart from the 3 claw distance from centering chuck just is 70mm. Handlers can expect the club directly pull pair of knife contacts to be on point of a knife. Press the key that start again next, let workpiece of deviate of X axis direction be more than diametical direction a paragraph of distance (outfit clip is not affected after deflection of cutting tool of main program G00100 namely can) , the program pauses, clamp 3 claw from centering chuck workpiece. Begin to machine the first spare parts by the key that start again, the 2nd with the 3rd spare parts automatic treatment is finished. After treatment of a group of spare partses is finished, press the key that start again, the machine tool returns pair of knives of the first spare parts to nod, begin to issue a group to the knife, circulate according to this. This kind of good stuff machines pair of knife methods, can avoid the error that when handlers is measured, causes, make sure the product machines quality, the speed that hold clip fast, efficiency is tall. 4.

Before epilogue craft is improved, in the treatment on common center lathe base of a nut that take a shoulder needs 4min. After craft is improved, every 5min can be achieved to machine 3 on numerical control lathe. Can see from this, after craft is improved, efficiency raised 50% above, and reduced labor intensity, product percent of pass also promotes somewhat, got handlers reputably. Actually this kind of engineering technology that optimizes process designing can be in car treatment promotion application. In car treatment, when spare parts precision asks length of taller, axial is lesser, can use means of this kind of treatment, still can machine more. To processing the manufacturing unit that give priority to with small, more practical when good stuff is machined. This kind of technique already got craft test and verify on the treatment in a lot of products. CNC Milling CNC Machining