How to turn double ended threads with G92 for FANuc CNC lathes?

1. Straight thread cutting cycle:

1. Format: g92 x(u) z(w) f 2. Example: <>

g97 s300 t0101 m03

g00 x35 z3

g92 z-21

g00 x100

Z50 two, cone and thread cutting cycle:

1. Format: g92 x(u) z(w) r f 2. Example: <>

g97 s300 t0101 m03

g00 x80 z2

g92 z-48 r-5 f2

x47g00 x100

Z50 Note: x, z are the coordinates of the end of the thread, you and w are the increment values from the start of the thread to the end coordinates, and r is the radius difference between the major and small ends of the cone thread.

If the coordinates of the starting point of the cone of the workpiece are greater than the coordinates of the end point, the numerical sign after r is positive, and the negative is negative, and the value is programmed with radius here. If a cylindrical thread is machined, r = 0, which can be omitted. After cutting the thread, the retracting tool is withdrawn according to 45.

Fanuc cnc g**.

Commonly used m**:

**Name-Feature Introduction:

G00 --- fast positioning.

G01--- Linear interpolation.

G02--- clockwise arc interpolation.

G03--- counterclockwise circular interpolation.

G04--- timed pause.

G05 --- interpolated by an intermediate point arc.

G07---z spline interpolation.

G08--- Feed acceleration.

G09--- feed deceleration.

g20--- subroutine call.

G22 --- radius dimension programming.

The G220 --- used on the system interface.

G23 --- programming method for diameter dimensions.

The G230 is used --- system interface.

g24--- subroutine ends.

G25 --- jump machining.

G26 --- cyclic processing.

G30--- magnification write-off.

G31 --- magnification definition.

G32--- Constant pitch thread cutting, inch.

G33--- Constant pitch thread cutting, metric.

G53, G500 - Set the workpiece coordinate system to write off.

G54--- set the workpiece coordinate system one.

G55--- set the workpiece coordinate system two.

G56--- set the workpiece coordinate system three.

G57--- sets the workpiece coordinate system four.

G58--- sets the workpiece coordinate system five.

G59--- sets the workpiece coordinate system six.

G60 --- accurate path mode.

G64 --- continuous path mode.

G70--- Imperial size (inches).

G71--- metric dimensions in mm

G74 --- back to the reference point (machine zero).

The G75 --- returns the zero point of the programmed coordinates.

G76 --- returns the start point of the programming coordinates.

G81--- Cylindrical fixed cycle.

G331 --- threaded fixing cycle.

G90 --- absolute size.

G91 --- relative dimensions.

g92--- prefabricated coordinates.

G94--- feed rate, feed per minute.

g95--- feed rate, feed per revolution.

The double-ended thread of the car can be used for G92 and G76, such as the M30X2 double-ended thread, which is the lead.

That is, the procedure is as follows:

s700 m03

g00 x33. z3.

g76p010560 q80

g76 z-40 p1300 q500 f4g00 x33. z5.

g76p010560 q80

g76 z-40 p1300 q500 f4

How to program the G92 taper thread of CNC lathe? It's urgent.

Hello dear, how to program the g92 taper thread of the CNC lathe: programming format G92 x(u) z(w) i f formula: x(u), z(w) - the end coordinate value of thread cutting; i - The difference between the radius of the thread section, i.e. the difference between the start point of the thread cut and the end point of the cut.

When machining cylindrical threads, i = 0. When machining a tapered thread, when the coordinates of the start point of cutting in the X-direction are less than the coordinates of the end point of cutting, i is negative, and vice versa is positive.

CNC lathe FANUC system, how to process multi-head threads with G76?

Hello, about the question you said. Command format: g76 pm r a q dmin rd; g76 x(u)-z(w)-ri pk q△d ff。

Instruction meaning: m is the final number of repetitions of finishing, two integers between 00 and 99, and 01 03 is often takenr is the amount of chamfering at the end of the thread, and the value is 00 99 digits, which is an integer multiple. a is the angle of the cutting edge, that is, the angle of the tooth profile; dmin is the minimum turning depth, radius value, d is the finishing turning allowance, radius value, x, z is the absolute value of the thread end; i is the thread taper value, radius value; d. The depth of the first turning, the radius value; F thread lead.

The Frank program the taper as r (radius value), which is the radius of the tip of the taper thread minus the end radius. Programming is based on the front-end diameter dimensions.

If you need to weave one, the tip diameter is 40, the tail end is 42, and the pitch is 2. Length 20, then r is 20 21 = 1, so r is 1, and the program is: g92 z r 1

g90 x（u) z(w) r f

x: The absolute coordinate value of the end of the cut (x-axis).

u: The incremental coordinate value (x-axis) of the cutting end point, the absolute coordinate value of the x-axis of the tool setting point - the absolute coordinate value of the x-axis of the end point.

z: The absolute coordinate value of the end of the cut (z-axis).

w: the incremental coordinate value (z-axis) of the cutting end point, the absolute coordinate value of the z-axis of the tool setting point - the absolute coordinate value of the z-axis of the end point.

r: X-axis coordinate value of the cutting start point - X-axis coordinate value of the cutting end point.

f: Cutting speed.

Only one can be used for x and u, and only one can be used for z and w.

g92 x(u) z(w) r f（i）

X U Z W R is the same as G90 F is the lead (single wire thread, lead = pitch; Multi-wire thread, lead = pitch * number of threads; i is the number of teeth per inch (inch thread).

Go to the book city to buy a CNC primary programming, and there are any systems.

G92 and G76 can be used for double-ended threads.

In the G32 straight cutting method, because both blades work at the same time, the cutting force is large, and it is difficult to row the cutting, so the two cutting edges are easy to wear when cutting. When cutting threads with large pitches, due to the large cutting depth, the cutting edge wears quickly, resulting in an error in the middle diameter of the thread.

However, the tooth shape accuracy of its processing is high, so it is generally used for small pitch thread processing. Because the tool movement and cutting are completed by programming, the processing program is longer; Since the cutting edge is prone to wear, it is necessary to measure it frequently during processing.

For example, the M30*2 internal thread bore has been turned, and the thread length is 20mm G92 X28 ;x---x---x30.;G0 is fine.

Yes, g0x, z g92x, z, f, x, x, ...g0x100, z100 and that's it......