JPS5964272A - Method of monitoring cnc-inner-surface grinder process - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for process monitoring during grinding of internal boreholes, external cylindrical surfaces and end faces with measurement control superimposed on the programmed course of the feed.

In order to achieve feed in an internal grinding machine, drowsiness-Isoki,
'Electro-hydraulic or programmed direct drive drives are known which guarantee the same fixed grinding cycle course for the workpieces. At the machining allowance point, the partial cycle is switched on, thus establishing constant starting conditions for achieving the finished dimensions.

Finished dimensions are directly grasped and each grinding process is completed immediately. If the geometry of the measuring device is 14 or less, the feed drive unit will forcefully trigger the grinding cycle 1 til J 1 fil. I feel threatened.

For example, if it is not optimal to synchronize the measurement contact with the feed, the zero dimension (Nul1maβ) may not be achieved, and in that case, the key is to finish grind the workpiece using Sensaku Kuri. Similarly, if there is a difference between the measuring device and the feed rate, manual correction or interruption of grinding must be performed. Synchronization of measurement control and feed is complex and time consuming since it recognizes clear dependencies and does not have 4G. Wear of the sharpening diamond is offset by a quantifier. However, this must be compensated in the feed cycle for a constant magnitude of iP:j.

This is because a definite switching point changes the starting point for finish grinding, especially when there are many different rough grinding speeds. The difference between the feed end point and the point at which the measuring device is switched off increases above all when the sharpening diamond wear increases and also when thermal trends increase.

The purpose of the present invention is to avoid the occurrence of defective products and prevent accidents.
Monitoring of the grinding process and response fault indication in the event of a failure of the center part or individual measuring contacts. In addition, there is a total of program control 1 by Yumei Moto? It is intended to achieve a 1hj simple method for FA adjustment of process progress with 1A coupling with tiiJ side 1.

In the present invention, the grinding cycle of the CNC-controlled internal grinding machine, which is a 12 tatami-sized measuring control unit, can be adjusted to reduce the finishing error of the workpiece by 7J when the grinding process has just finished finishing grinding in the event of a failure of one measuring contact. The goal is to create a structure that will lead you to the end without any problems. In addition, achieving a simple adaptation between the program progress and the measurement t[tlJ control] during the adjustment cycle is also a challenge for Kineiyu. This problem is solved as follows: The measuring device determines the absolute switch-off point, so that it is installed in a known manner to the finished dimensions according to zero parity, a template, etc., and on the basis of this the measuring device is If some of the contacts are inconsistent, these should be
The finished dimensions are determined according to the impm classification.

Next, the workpiece is programmed and ground in a certain manufacturing technology process using an automatic σF grinding cycle, in which case the point at which the measuring contact is switched on is automatically taken over in the feed program process. The partial cycle end points and finished dimension reaching points thus assumed by the CNC-controlled fixed program must then be set to zero dimension. Therefore, the feeding program corner 4 is directly superimposed on the measuring system iiU, in which case in the subsequent grinding cycles the deviations of the image controls from each other are determined by the specific programming and are only d′F. Ru. This provides the starting point for the automatic rotation of the grinding wheel. If one, several or all 1" measuring points fail, the finishing of the workpiece on the cutting edge (IJI cutting is carried out by the program control realized in the case of the preceding workpiece. !The next step is to turn it into a Grogujim in Kita.
! be done.

First of all, we will examine the machining of various workpieces with 44-grade hardness, grinding allowance, and grindstone wear.

For the machining of the workpieces in this building, several measuring contacts are required for the heaviest tllJ 1fill of the +17F grinding cycle. It is also divided into several feed ranges and the range where the grinding wheel is rotated at feed rate 1.c, and these are grasped by the corresponding program points.The first measurement contact is the end point, which is the programming of the rough grinding feed. If this first measuring contact is not reached before the first programmed point of the CNC-feed, further feed will be carried out to this point, and the phase of turning the grinding wheel without feed will be interrupted. Feed after rough finishing 1. If the grinding wheel does not turn at C and does not reach the second measuring contact point at the end of time step south or reaches ji, the feed will automatically return to sharpening position 1 and resume operation. At the same time as sharpening, a fault indication is given for the first or both measuring contacts. If the machine is not turned on, the feed at the finish grinding speed will go to the programmed end point of the rough grinding feed, and the feed will be 1. , turn the whetstone 1-
Failure to reach the second measuring point also causes a one-step feed back to sharpening, and a fault is displayed. The final grinding phase can be designed, for example, for turning the grinding wheel without two infeeds and one infeed, with measuring contacts provided at the respective end points. If no switching occurs with these measuring Y contacts, further grinding is carried out up to the programmed end point of the partial cycle.

Measuring contact failures are indicated each time. Direct 1JII
constant mlJ fullll and indirect contact GNC-m'J
Guaranteed to be undertaken by J.H. In other words, each workpiece is ground to the end according to the XJ method, and only then is the grinding process interrupted and the measurement contacts re-adjusted or failure analysis performed. Between the point at which the measuring control device is forcibly switched off due to N of the two control processes and the programmed switching point of the CNC controller, there is a measuring contact or a primary cycle monitoring device. is always before the programming switching point, so a difference always appears. Since the distance between the actual measurement value of the measuring device and the #4 value of the programming switching point is always selected to be smaller than the machining tolerance, in the event of a constant contact failure, one i can be ground to size. 1 At the same time, the measurement device 4 was brought up to its peak and the CNC-City 1 ``objective'' (detailed explanation of the ``objectiveness'' of the ``direction'' was carried out regarding a certain runner). After that calculation (after the fF number due to age, for example, a correction of the corresponding program point of the feed axis in the determined dressing basis for the thermal fig direction in finishing and for the compensation of dressing diamond wear is obtained.The entire feed cycle of the program tliIJ master) is continuously adapted to the measurement 111] control by automatic correction.For workpieces in the normal manufacturing process, the measuring device can be switched off directly at zero dimension or indirectly at zero dimension in finish grinding with one measuring contact. We propose a grinding cycle in which the switch is turned on and off, and the grinding wheel is rotated without turning for a preselected period of time.For this purpose, it is absolutely necessary to make the zero dimension in the above-mentioned manner. This is because in this case there is no programmed monitoring of the partial cycles by means of measuring contacts.The 7' programmable point of the light line must be used to obtain the perfect crest conditions for achieving finished dimensions and consistent quality. 1 must be at a certain distance MIK to the zero dimension l'
Regardless, the distance is the final QJ conversion point/1111 foot contact point π
Switchge of 16 grinding cycles 1. It is kept constant by the gift of IJru/+A.

These Sakae [F is CNC-City 1 for multiple bt optional cutting
The following is a detailed explanation of the non-inventiveness of the mold caused by the use of a fixed device.

The method according to the invention is illustrated by the diagram in FIG.

1. The passage of time is plotted on the vertical axis (IC is the evolution of the feed motion. The entire cycle is divided into two parts: rough grinding and finish grinding, in which the grinding wheel is rotated without feed, respectively). There is a fixed position 75 between the rough grinding cycles.
; The retraction of the feed is provided in order to carry out intermediate sharpening of the grindstone. The distribution of the individual program switching points is determined in this special case by P as starting point. Kara P,
It is carried out on the market. In this case, the solid line shows the course of four cycles of <vt cutting under programming, and the broken line shows the course of cycles under measurement control. 6-1: The first contact between the workpiece and the grindstone is made according to the grinding cycle progress that is programmed (~).

111J: iJ, as can be seen from the table 1, the grinding feed rate is Gr'drum switch off) point P2. P. The turtle gradually moves to <7゛.

The finish of 1σ is divided into 4 parts in the same way. The time range for turning the Ishiro stone without feeding is exactly JQL and ℃C by hand.

The 1st part of the 4-cruise grinding process that is programmed is ;ill
At the stage up to constant It + point MK, it is L1 (Suite (7z)
At the program switching point P, where the program change point P, the ``Renken 11'' feed is performed. Subsequently, until MK, the workpiece-tool-mechanical system is loaded and reduced, and the round surface is rounded without feeding for a certain time period, and the subsequent sharpening of the grinding wheel is carried out using Toshiko Iruka. Ku. When crossing inconspicuously, 'CMiJ' is carried out until just before P4, that is, within the safety margin. Here, for example, finish grinding is started at a feed rate of two steps until the measurement contact point is reached before the program switching point 26. M■(,
It is a sideways input that turns 11 Takeishi without sending up to. New - Finishing method before 20th and starting position P of Lit'fx
The regression to 0 continues. In this regard, two ICMs can be identified, which are the grinding cycle progress through programming and the one-cycle progress through a measurement control with n measurement contacts. For this purpose, measuring contacts M1 (1 to MK) are provided.These defining contacts each have a manufacturing tolerance smaller than the program switching point. .So, MK performs cutting just before P4.The MK is cut and the M stone is not turned without feed until MK2.If MK is fine, it is ground to P4 and then the grindstone is turned without feed. I learned of the failure of 1 in M, and vomited it.If BL and NI were not suitable, I continued to feed the finishing tool to P4 with continuous grinding, and then turned the grindstone without feeding.
When the iK is moved back for polishing, it displays a malfunction. Do the same thing even if there is one at the central purchase measuring contacts MK to M16.

The diagrams in FIGS. 2 and 3 show the same process with the superposition of the course of the grinding cycle in the case of one defined contact point, the measurement in the finishing cut F-cutting with switching off at the direct zero dimension of the positioning and the subsequent represents one hour of turning the grinding wheel without any pre-selected general feed. This, other dl11
Since partial cycle monitoring by means of constant contacts is carried out, it is absolutely necessary to match the zero dimensions. In order to obtain the desired result for finished dimensions and constant quality, the preceding program switching point must be at a certain distance from the zero dimension.

This +jiJ is the 1 of P6 for the measurement contact yi1(,
It is brought about by the modification Cζ of IfTd- and Daiken's 1) 1 to P.

The advantages of the proposed a-grinding method can be seen, inter alia, in the fact that it is possible to complete the grinding of the workpiece to size even in the case of a single gauging contact. This is particularly important in the case of production of small quantities of 11) h., h., and c. Previously, each piece had to be completed in a single process, often resulting in a rejected product. Another advantage can be seen in that a 1.1 display is possible due to the lack of measurement control.

In addition, automatic monitoring of the switching points of the measuring device in the CNC program makes it possible to adapt the two controls to each other in a relatively simple manner in the adjustment cycle.

"15" for the use of CNC-measuring devices for multi-position grinding by the use of a measuring titlJ control with one measuring contact.
The situation is given.

[Brief explanation of drawings]

Figure 1 shows the progress of the grinding cycle using 11 measuring contacts, and Figure 2 shows the progress of the grinding cycle using the measuring contacts that cut the switch at the zero dimension. The graph shows the progress of the grinding cycle using the quarry contact. ×

Claims (1)

[Claims] Good luck! In the process monitoring method of a CNC internal grinding machine with, for example, a numerically controlled drive and a folded measurement unit for the jI, the measuring device measures the finished dimensions according to a one-pilot return, a template, etc. in a known manner. The measuring contact points are set in
The switching points of the measuring contacts are ground in a cycle
is automatically taken over during the feed program, and the difference between the two controls is! [The values are manually entered into the computer with fixed values, and then transferred to a CNC-controlled fixed program regarding the completion of one cycle and the arrival of finished dimensions.Certain points are corrected to zero when the difference exceeds the value. A method characterized by