JPS59146717A - Driving system of numerically controlled device - Google Patents

Abstract

PURPOSE:To fabricate by machining a high-precision thread by synchronizing in a tapping operation revolution and feed of tool and providing also the synchronized feed with a revolution by inertia of the main spindle after a stopping command is given. CONSTITUTION:From a starting point of tapping operation P1(Z=Z0) to that of stop P2(Z=Z1), a synchronized feed of the main spindle (tool) is performed by a number of revolutions S0 of the main spindle, and a feed f0 per a single revolution of the main spindle. Even after a stopping command of the main spindle is given at the stopping point P2, the main spindle makes a few revolutions by inertia, however, in this period also, the number of revolutions of the main spindle is detected for the synchronized feed and thus, this synchronized state is continued up to a drifting position P3(Z=Z2) of the tool, covering the whole tapping distance. A synchronized feed is given by reversing the revolutions of the main spindle from the drifting position P3 to a drawing-out position P4.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention (i.

Conventionally, tapping processing using a numerically controlled machine tool has been carried out using the Y/V motion method as shown in FIGS. 1 and 2.

1M is a diagram showing the 113th building of Tanobu Kogyo. [Fig. TE, 1ii Upper working machine σ] Main lll11 chuck, 2 is a tap tool, holder part 3. Damper part 4. The cutting blade part 5 is constructed in one piece, and 6 is a buffer such as a main spring, which is located inside the damper part 4, and the tamper part 4 can only be expanded and contracted in the length direction. be.

FIG. 2 is an explanatory diagram of the machining method, where 7 indicates a prepared hole for pre-machining for tapping, and 8 does not indicate a program.

Next, the processing method will be explained.

First, in pre-machining, the lJ hole 7 is drilled as shown in Figure 2.

Next, tap addition I is performed according to program 8. In program 8, NO(l 1-NO04 is a sequence number, Gfl is a positioning command, G1 is a synchronous feed command, X, Y, Z are coordinate words, and F is a feed rate (mm
/rev)-S] is the rotational speed of the two shafts, MO3 and MO4 are commands for normal rotation and reverse rotation of the main shaft 11, and N105 is a command for stopping the main shaft. Now, after positioning the tool at the position I^ of Z=;l!o in the figure using the sequence number N (l Ol), the number is set to 7, and the spindle rotation speed S.r is determined by the number fl O(+2).
pm forward rotation, synchronous feed rate of 1 degree per spindle rotation, add at command position Z==z,':F')n Z-Z l
After processing with f, /'-ken number mamakawa 3'', s:
Stop one ball shaft. At this time, the master 11 (IE is completely rotated, so 11i runs at the same time, so the +2 is not pulled as a screw, and Z = z,, is extended within the allowance of the damper Fllt 4 at 18 imma. 1. After that, the main shaft is reversed by sequence number IJ (104), and the cutting blade 5 is pulled out, +1 + - [end r.

J: , jlS L Muni In tapping with a machine tool using a conventional θ value control device, it is not possible to program the synchronization of the main 11M1+d feed rate; W at the time of a spindle stop command. Depending on the capacity,
However, it has the disadvantage of being able to only perform machining at speeds below the spindle speed.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by maintaining the synchronous relationship between the main shaft and the feed even when the main shaft rotates from normal to reverse at the bottom of the screw during the screwing cycle, It is an object of the present invention to eliminate the deterioration of processing conditions due to the restriction of the damper portion and to perform tamp processing at the maximum machining condition.3 The present invention will be described below with reference to the drawings.

Figure 3 shows the synchronization relationship of the main axis + Z + drawing (movement axis), command position, etc. of tapping according to the numerical value 1IllIφ11 manufacturing allowance of this invention. In this figure, I) is the tap starting point (Z 2 zo), 1) 2 is the command position and tap end point (Z 2 z +) = Pa is due to the coasting of the spindle at the time of the spindle stop command] - tool flow position (Z = 72), i
)4 is the digit of the tap withdrawal point (Z=zo),
9 is from tap start point PI to tap end r, a P 2
f-CノZ
1itl movement, 11 is the tool flow position 1df, P3
or 1') Z-axis movement to position P4 of the tap extraction point.

Next [juj's work will be explained. Looking at the younger brother 3 diagram, tap start point P from sequence number NO01K.

After positioning the tool, sequence number>3N(1+12
Therefore, the spindle rotation speed S. rpm, main 11-111 rotations f
. With synchronous feed and forward rotation, add up to tap P near point)) 2) 3゜Next, sequence number N
Sawari, the same speed 19-command in the same direction as the previous block! I will send JI. Drifting position P of the tool when the spindle has stopped
At the time of , the front desk is considered complete and the return number
(+()4 performs tamp withdrawal at position p4 of tap withdrawal point.

FIG. 4 shows the flow of one embodiment of the present invention.

1, q) to O indicate step numbers.

Calculate the cutting increment L Y, - by the tap command ■2. Also, detect the current spindle rotation speed N from the main 11ih encoder 1-flIL-5 to L, program, and take in the fixed value ΔT in units of 1 hour. , unit time ΔTK
The movement per m time #ll & L = F・ΔT・N
Total 'l]] Iru■. From this L and F・ΔT−NVC, move flr, and output the data of F・ΔT−H to the Lee–Hoter control until L becomes zero.
■With 0 servo motor 1 stroke ■, this F・ΔT
■、■ Moves Tanabata by the amount commanded by -N.

Move! 11b When the scale becomes zero, the main shaft will rotate several times after the stop command due to inertia while applying the main stop command (■.shih). Output (■,■.

110 times, the main +ll+ stops) It is possible to maintain the synchronized relationship of L Tsukuda 1, 1, and ζri. 1 In addition, in this example, the explanation will be given using an example of a program using the EIA hood. However, the same effect can be obtained by performing the synchronization cycle as described above.

As explained above, the present invention allows the rotation of the spindle to continue in a feed synchronized relationship with the tool from the cutting start point to the pulling end point in the cutting process.
It has the advantage of being able to perform club machining under optimal processing conditions and machining high-quality screws with high accuracy.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing the structure of a tap tool for a commonly used machining tool, Fig. 2 shows a machining method for club machining along with a program example, and Fig. 3 is a schematic diagram showing the structure of a tap tool for machining machines that is commonly used. Figure 4 is a diagram showing the synchronization relationship between the main axis of tamping, the Z-axis (movement axis) command value 1, etc. +jilb y-dock, 2
〃knob tool, 3 is the boulder part, 4 ke gunba part, 5 is the cutting edge part, 6 is the loose 1/i+f material, I is the 11 hole, 8 is the program, 9 is the tap from the tap bar start point to the tap end point Z4111
Transfer! ii5.10 is the movement of ZIllIl from the tap end point to the tool resting position, 11 is blf of soil t1,
From t1 point to tap pull point 11/1' ma-C.
Z: Movement of Ilb, Pl is the beam/bracing start point, P is the tap end point, P is the first position of bar-1-↓t, and P4 is the 14th place of the pinion 7° pull-out point. Agent Satoru Kuzuno - (1 other person) Figure 1--X Figure 3 Figure 4 (1,)

Claims (1)

[Claims] Attach the tapping tool to the main 1tf+, and
1. Numerical 1h control device for machine tools that performs tapping by rotating jl+ forward and reverse. It has a means for feeding the tool in synchronization with the main rotation, and a means for reversing the rotation of the spindle in the middle of machining, and the rotation of the spindle from the start point of cutting in tapping to the end point of pulling out. Continue the synchronized relationship between the tool feed and the tool feed to perform the cutting process.5
Kaku! is a numerical control device that is characterized by its ability to control. II
H method.