How to determine the starting point G00 of CNC programming G73 5

Why G73?Now you should be able to use g71, a few use g73, you can be almost 10 from the workpiece, about g00 x55 z 10; (I haven't played for a long time.,I've forgotten whether the diameter of 100 should take the radius or the diameter.,Anyway, it's probably enough for a big 5.,Z10 or 5 can be) There are a lot of textbooks that have problems.,90 Mao Pei 150 has to do 2 hours.。。

The main thing about G73 is not this, the main thing is the amount of feeding, it depends on what kind of tool, you have to ask your teacher, this depends on the situation, generally speaking, rough machining is about because you are G73 finishing approximately.

And really haven't used it for a long time, I think about it probably because you are a car, so G73 may need to be located to 150 because there is a slot, so you cut too much at the beginning, the knife will break, look at it in the simulation software, remember, I haven't forgotten this G73 is a hollow knife at the beginning, and then the first cutter must be the smallest diameter of the place, that is, the groove, the first knife can not be Mao Pei's head, basically in the middle.

Summary. The format of G72 is G72P1 Q2 U W F G72W R r is the amount of retract. The path is from left to right. From the end coordinates of z to z0

The format code of G72 is G72P1 Q2 U W F G72W R r is the clearance of the retract Qi mode. The path is from left to right high front. From the end coordinates of z to z0

The car is good and retreats to the positioning point with a knife, and the knife is g1 or g0.

Number of car retracts: 1When grooving, the retract speed follows the knife speed until it leaves the surface of the workpiece, and then G0 leaves quickly; 2.

When the outer circle of the car, try to retract x z, and retract the knife obliquely (because if the 90-degree turning tool is withdrawn first, it will pull the uncut part of the end face of the cover ear); If you use a straight retract, it is recommended to retract x at a normal turning speed of -1mm, and then g0 to quickly retract z; 3.The end face of the 45 degree knife first retreats z and then retreats x; If a double-edged 93-degree turning tool (usually 90 degrees) is used, it leaves the end face at a speed of g1 and then retracts x or z at a speed of g0; It is optimistic that the retract position will not affect the tool change, and will not interfere with other machine tool components; About the anti-rust part; 1. Flat and excellent anti-rust oil; 2. Pay attention to wipe the knife clean before rust prevention; Then rust prevention; Keep the room dry; collision section; The tool management car talks about the knives placed separately, and it is strictly forbidden to put the knives together without any packaging; The above is the CNC shank part; About tungsten carbide inserts; These are all boxed when they arrive, and you only need to put the same blades together, and you don't need to go to Suishu Mountain to prevent rust or something; But be careful not to mix two or several blades together; If it is a drill or milling cutter; Especially milling cutters; Special attention is paid to the protection of the guessing edge; Do not touch or drop on the ground; If there are more and more heads; It is also necessary to pay attention to rust prevention, and then pay attention to whether the locking screw is loosened when adjusting; When the cutter is used, if there is a screw anti-jamming agent, be sure to add it, so as to prevent the screw from getting stuck; Suppose the cutter encounters a rusty situation; It is not recommended to use sandpaper and other coarse grinding, it is recommended to buy a polishing agent specially used for polishing, the particles are relatively fine, much like toothpaste, so that the taper part of the tool is less damaged, and it is relatively smooth when thrown.

Hello, Guangshu G71 programming car outer cylindrical belt large R when R is not turned many times according to the feed amount, usually for the following reasons: 1Programming error:

When writing the G71 program, there were errors or logical errors that caused R to not turn correctly multiple times according to the feed. 2.Parameter setting error:

When setting the programming parameters of the lathe, the continuous turning parameters were set incorrectly, resulting in R not being turned correctly according to the feed rate. 3.Tool wear:

If the tool used is highly worn, it will cause an error in the calculation of R when performing turning, which in turn will cause R to not turn correctly according to the feed number many times. 4.Lathe failure:

If there is a fault in the spindle or feed shaft of the lathe, it will cause R to not turn correctly multiple times according to the feed. In view of these problems, the following measures can be taken to troubleshoot and solve:1

Check programming: Check the G71 program for logical errors or coding errors, and make sure that the R is turned multiple times according to the feed. 2.

Check the parameter settings: Check whether the lathe programming parameter settings are correct. If there is an error in the settings, you will need to set it up again.

3.Tool replacement: Replace the tool with a new one, making sure that tool wear does not affect the R calculation when you are turning.

4.Inspect the lathe: Check whether the spindle and feed shaft of the lathe are faulty, and if necessary, repair or replace.

G71 is the external rough turning compound cycle instruction in the CNC machining technical instruction.

Format: g71 u( d) r(r) p(ns) q(nf) e(e) f(f) s(s) t(t).

Description: G71 U(δD) R(E).

g71 p(ns) q(nf) u(δu) w(δw) f(f) s(s) t(t)

Among them: δd is the amount of back eating knife;

e is the amount of retract;

ns is the segment number of the beginning segment in the finishing profile program segment;

nf is the segment number of the end segment in the finishing profile program segment;

u is the finishing allowance left for the x-axis direction; (Diameter Value).

w is the finishing allowance left for the z-axis direction;

F, S, T are the feed, spindle speed and tools used during rough turning. The f, s, and t that are in the NS to NF segment during finishing are valid.

1.The use of composite fixed cycle needs to set a cycle starting point, the tool according to the path arranged by the numerical control system, layer by layer according to the linear interpolation form of the rotary turning into a stepped shape, and finally along the rough turning profile to turn a tool, and then return to the cycle starting point to complete the rough turning cycle.

2.The contour of the part must conform to the direction of the X and Z axes and increase or decrease monotonically at the same time, that is, there can be no concave contour shape; The first instruction in the finishing segment can only be G00 or G01, and there can be no Z-axis movement command.

Commands can also be used for rough turning of bore profiles.

The instruction is only to complete the rough turning program, although the finishing program is programmed in the program for the purpose of defining the part contour, but the finishing program is not executed, and the finishing program is only completed when the G70 is executed.

g71u__ r__

g71p__q___f__

Explanation: G71 U (single-sided eating depth) R (retract amount) G71 P (finishing first program section) Q (finishing final program section) F (rough turning pass).

n (first segment) g0x

n (finishing the last program segment).

g0z___