JPH0241801A - Y-axis work method - Google Patents

Abstract

PURPOSE:To prevent an adverse effect due to reversing action to perform higher precision of a work face by offsetting a turret axis a tool axis by a preset distance to cause the reversing action of a turret at a position far from a work axis to the extent of offset. CONSTITUTION:The axis G of a revolving tool 23 in parallel of the axis Cw of a work 21 is moved in parallel of a X axis at a distance B from the X axis transverse to the axis Cw, and therewith is cut at a right angle at a distance B from the axis T of a turret 22 which is turned. It is defined that a distance between a plane face PTX transverse to the X axis including the turret axis T and a plane face PWX transverse to the X axis including the axis Cw is X, the value of a vertical projection of a distance between the axis T and the axis Cw to a plane face PT, including an axis CT, transverse to a plane face PW transverse to the axis PT and the axis Cw is Y, putting them into action so as to be X<2>+B<2>=(Y-B)<2>+A<2>. The angle theta of the X axis and the axis CT is given tan<-1> [(AB-X(B-Y))/(AX+B(B-Y))], and theta and X is given the function of Y, when A, B are constant to vary Y for performing Y axis work, Y=B is found and X is minimized to be able to set properly a B value and to avoid reversing action during working.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a Y@ machining method that can improve machining accuracy in compound machining on a numerically controlled (hereinafter referred to as NG) lathe.

(Prior Art) Conventionally, as a composite machining (generating machining, etc.) method using an NC lathe, there is a front machining method in which the C axis (main axis) and the X axis are combined and operated.

FIG. 7 is a front view showing an example of the machining section of an NC lathe that implements the conventional front machining method, and (a)-(b)-(C)
Processing is performed in this order. This machining section has a third axis TF that moves along the X axis parallel to the axis (a@)cwr of the workpiece 1 and orthogonal to this C@bcwr, and this:
*It is composed of a turret 2 that can rotate around TF, and a rotary tool 3 that has an axis (CTLDL) parallel to this turret @TF and is rotatably attached to the end face of the turret 2. .

In such a configuration, to explain the case of machining the front side of a disk-shaped work l, the turret 2 is rotated around the turret axis TF, and the C1 axis CTF is moved on a plane including the CNCwr and the turret @TF (the same - on the X-axis), and the rotary tool 3 is rotated to perform processing while synchronizing the movement of the turret 2 and the rotation of the work l. That is, define a plane PTF that is parallel to the machining surface (dotted line in the figure) and passes through CJLkCTr, and a plane PWF that is perpendicular to the machining surface and passes through cfqbcwr, and let the distance between Ct@Ctr and the plane PWF be Yr, CNCwr. The distance between and the plane ptr is A,
, C, and the distance between the axis c r and the CNCwr is assumed to be X, and the operation is performed so that the following equation (1) is always erected.

Xr2= YF2"Ar1・" --(1) In addition, as another conventional compound machining method, turret axis, C axis (main
There is a side processing method that combines and operates the Pub ) and X-axes.

Fig. 8 is a front view showing a part of the machining section of the NC lathe that realizes the conventional side machining method, and shows (a) → (b) → (C).
Processing is performed in this order. This machining section includes a turret 12 having a glaze TS that is parallel to @ (C axis) Cws of the workpiece 11 and rotates along the X axis that is orthogonal to C@Cws, and It has an orthogonal axis (C axis) Cts, and is composed of a rotary tool 13 rotatably mounted on the side surface of the turret 12.

In such a configuration, when machining the side surface of the disc-shaped work 11, the rotary tool 13 is rotated and the machining is performed while synchronizing the movement and rotation of the turret 12 with the rotation of the work 11.

That is, the plane PT including the turret axis TS and Ct@Cts
S and a plane P6 that includes CfII]Cws and is orthogonal to the C1 axis CTF, and the turret l1IhTS and cft
When the distance 1 with d+cws is ×3, this distance l1i
If the values when IIXs is vertically projected onto each plane PTS and PwH are AS and YS, respectively, then the following equation (
Operate so that 2) holds true.

X52-y, 28S' (2) (Problem to be solved by the invention) In the conventional front processing method, CJ [kCTr is cItkcw
Since it is parallel to r, there is a drawback that drilling cannot be performed on the side surface of the workpiece 1. In addition, in the conventional front processing method and side processing method, YF and Y5
When becomes 0, the turrets @TF and TS come closest to c@cwr and CWS (Fig. 7(b) and Fig. 8(b)
)). And after this time, Turret@bTF and TS
moves away from the C-axis CWP and CWS (FIG. 7(c) and FIG. 8(C)). Therefore, this reversing operation causes buckling and elastic deformation of the rotary tools 3 and 13, resulting in a drawback that the accuracy of the machined surface becomes unstable. Particularly in keyway machining, which requires precision, there is a problem because the keyway is usually positioned in the radial direction passing through the C-axis.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a Y@ machining method in which the workpiece is not affected by the adverse effects caused by the reversing operation of the turret.

(Means for Solving the Problems) The invention relates to a Y-axis machining method that can improve machining accuracy in complex machining on an NC machine, and an object of the present invention is to rotate a workpiece around a first axis. The turret rotates about a second axis that is parallel to the first axis and is spaced a predetermined distance from a first plane including the first axis, and The tool rotates around a third axis that extends in the tangential direction of a point on a circumference having a radius of the predetermined distance and rotates with the rotation of the second axis, and simultaneously rotating the shafts in the same direction and at the same rotational speed, and moving the second percent parallel to the first plane, and machining with an axis perpendicular to the first axis and the third axis as the Y axis. This is achieved by having control.

(Function) In the YIjlIl processing method of the present invention, the axis of the turret and the axis of the tool are offset by a predetermined distance, and the reversal operation of the turret occurs at a location separated by the offset amount from the glaze of the workpiece. By appropriately selecting the amount, it is possible to prevent the work from being affected by lightning.

(Example) FIG. 1 shows YIlill! of the present invention. It is a front view showing an example of the machining part of the NC lathe that realizes the machining method, and is a front view of a workpiece 2.
1 axis (C axis) Distance l! from the X axis which is parallel to Cw and orthogonal to this C@Cw! ! a turret 22 having an axis T that moves parallel to the X-axis and rotates at a distance tB;
And the distance from this turret III! The turret 22 has an axis (CT axis) that is perpendicular to each other across 111B.
The rotary tool 23 is rotatably mounted on the side surface of the rotary tool 23.

In such a configuration, processing is performed while rotating the rotary tool 23 and synchronizing the movement and rotation of the turret 22 with the rotation of the workpiece 21. That is, including the turret @T,
A plane P perpendicular to the X-axis. X and C! 1iT.

Let X be the distance from a plane PWX that includes CW and is orthogonal to the X axis. Furthermore, a plane P that includes the C-axis CW and is orthogonal to the C7-axis CT. and a plane PT that includes CT and is perpendicular to the plane pw, and the value when the distance between the turret @T and the C-axis Cw is vertically projected onto the plane PT is defined as A, and the plane PT and C@CW When the distance from

X2 + 82- (Y-8)2 182
・・・・・・・・・ (3) Here, C axis C1
The angle formed by the X axis perpendicular to C1 and C7 is θ(=α+β
), the following equation (5) is derived from the relationship of the following equation (4).

・・・・・・・・・(5) Further, the following equation (6) is derived from the above equation (3).

X= Y-B +A -8・-・・・・・
・(6) Therefore, θ and X are each a function of Y (θ−f(
Y).

X-g(Y)), and the movement of Y is expressed as θ and X
That is, it can be realized by a movement that combines three axes: C glaze Cw, CT axis CT, and X axis. In the above equation (3), if both A and B are set to constant values, the following equation (7) exists.

In other words, for a change in Y, X is
The value is always larger than MIN.

When machining the side surface of the disk-shaped workpiece 31 shown in Fig. 2, ((a) = (b) −= (c) −
Processing in the order of (d)), the value of Y is changed to Y, →Y2
When the value of X is continuously changed in a certain direction as →Y3→Y4, the value of X changes as ×1=X 2 =X 3→X4. That is, when Y2.0 ((b) in the same figure), it becomes x2-8, and Y3-
At 8(7) ((C) in the same figure)X3=XMIN-Fν]7
As a result, the turret axis T approaches the C axis CW most closely. And after this moment, the turret l1lllT became C! Iith
Move away from CW. Therefore, in the conventional method, an inversion operation was performed at the time of Y.0, but according to the method of the present invention, the inversion operation is performed at the time of Y.
By setting the value of to an appropriate value, reversing operation during processing can be avoided.

FIG. 3 is a block diagram showing an example of an NG device for controlling an NC lathe that realizes the Y-axis machining method of the present invention. Interprets the Canadian program PR read through 42 and sets the Y-axis control mode Y-MD.
or non-Y-axis control mode Y-MO, and whether or not there is an axis movement command, and the Y-axis control mode is Y-MO,
And when there is a Y-axis movement command, it outputs the Y-axis command value COMY, and when it is in non-Y-axis control mode Y-MO and there is an axis movement command other than the Y-axis, it outputs the axis command value CAMA. Program interpreter 43 and YItIIIl command value COM command value C0 control Y from the program interpreter 43
A Y-axis number generation unit 44 generates a function of YITIII based on the mode Y-MO to obtain a Y-axis calculation value C0NY, and a Y-axis calculation value C0NY&: from this Y-axis calculation value C0NY &: Xl1ilb, C! 1! It has a Y11th=X, C, and CT axis conversion unit 45 that calculates each calculated value of the tb, c, and r axes.

Further, based on the axis command value COM8 other than the Y-axis from the program interpreter 43 and the non-Y-axis control mode Y-MD, a function is generated for that axis to obtain the axis calculation value C0NA.

cy, z @ leap number generation unit 46 and Y-axis manually distributed via switching unit 47 - X-axis, C-axis 2C-axis calculation values from T @ conversion unit 45 and program interpretation By the Y-axis control mode Y-MD from section 3, or X, C, C
The computed values of
Drive units 4B, 49, 50.51 for each axis that respectively drive each axis X, C, CT, and Z using axis control mode Y-MO.
It is made up of.

In such a configuration, an example of its operation will be explained with reference to the flowchart of FIG. 2. In step Sl, the program interpreter 43 reads out one block of the modified program from the program memory 41 and interprets it.

S2), it is checked whether it is the Y-axis control mote Y-MD (step 53). If the read machine program is the Y-axis control mote Y-MD, the presence or absence of a Y-axis movement command is checked in step S4), and if there is no Y-axis movement command, the process proceeds to step Sll.

On the other hand, in the judgment step S4, if there is a Y@-movement command, the Y-axis number generation unit 44 generates the Y-axis command value COMY.
Output. Then, the Y-axis number generation unit 44 generates a Y-axis function based on the Y-axis command value COMY from the program interpretation unit 43 and the Y-axis control mode Y-MO to obtain the Y-axis calculation value C0NY (step S5), Y axis → X, C
, CT axis conversion unit 45 calculates the calculated values for the X axis, C axis, C, and i (step 56).

On the other hand, in the judgment step S3, if the read Canadian program is in the non-Y@control mode Y-MO, the presence or absence of movement commands for other axes is checked in step S7).
If there is no movement command for other axes, step 5111
．． :move on. On the other hand, in the judgment step S7, if there is a movement command for another axis, the other axis command value COM8 is output to the X, C, CT, and Z axis number generation section 46. Then, the X, C, Ct, Zllll function generation unit 46 receives other axis command values [:O
Functions for other axes are generated based on MA and the non-Y glaze control mode Y-MD to obtain the axis calculation value CON (step Sa).

X-axis, C-axis, CT axis Y-axis → X, C, CT! which is manually distributed through the switching unit 47 in the axis moving unit 4849.50! M
X-axis from the converter 45, a! Each calculated value of ith, CT@ and Y@control mode Y from the program interpreter 43
-MD drives the angular axes X, C, and CA, and performs Y-axis control by a composite operation of each axis. Also, X glaze, C axis, C7
axis, Z-axis drive section 4B, 49, 50.51, switching section 47
The X, C, and CT are distributed manually through the two-axis number generator 46, and the X-axis and C-axis are distributed manually.

Co-axis, ZI+b calculation values and program interpretation unit 43
With the non-Y-axis control mode Y-MO from
+X, C, CT, and Z are each driven (step S9).

Then, it is checked whether or not the function generation in the Y-axis number generation unit 44 has been completed (step 510). If the function generation has not been completed, the process returns to step S5 and the above-described operation is repeated, and the function generation is completed. If so, determine whether the Canadian program has ended or not with r:4. Step 5)
, if the Canadian program has not finished, step S
The process returns to step 1 and repeats the above-described operations, and when the Canadian program is completed, all processing is completed.

5 and 6 are a perspective view and a front view showing a typical example of machining by the method of the present invention, FIG. 5 is an example of vertical keyway machining on the side surface of a cylindrical workpiece, and FIG. 6 is a workpiece Drilling a hole at a position off the central axis is an example of machining.

Note that the movement of the X-axis perpendicular to the Y-axis is YIT! [ll,
It is also possible to control by a composite operation of the C-axis and the co-axis.

(Effects of the Invention) As described above, according to the YIlb machining method of the present invention, the workpiece is not adversely affected by the reversing operation of the turret, so that the accuracy of the machined surface can be significantly improved.

1, +1.21. :II...Work, 2, ■222・
...Turret, 3゜13.23...Tool, 41...
Canadian program memory, 42...program reading section,
43...Program interpretation section, 44...Y1iIIIl
Function generation section, 45...Y@j→X, C, C□ conversion section,
46...X, C, CA, ZITlb function generation section, 47
...Switching section, 48...X-axis drive section, 49...C-axis drive section, 50...ct@drive section, 51...Z-axis drive section.

[Brief explanation of the drawing]

Figure 1 shows an NC that realizes the YIFll processing method of the present invention.
FIG. 2 is a front view showing an example of the machining section of a lathe, FIG. 2 is a diagram showing the machining process by the NC lathe, FIG. 3 is a block diagram showing an example of the NC device that controls the NC lathe, and FIG. 4 is the NC lathe. A flowchart explaining an example of the operation of the apparatus, FIGS. 5 and 6 are a perspective view and a front view, respectively, showing a typical example of processing according to the method of the present invention, and FIGS. 7 and 8, respectively, showing processing steps according to the conventional method. It is a diagram.

Claims (1)

[Claims] 1. The workpiece is rotated around a first axis, and the second axis is parallel to the first axis and spaced a predetermined distance from a first plane including the first axis. The turret rotates around a third axis that extends in a tangential direction of a point on a circumference having a radius of the predetermined distance around the second axis, and rotates with the rotation of the second axis. The tool is rotated, the first axis and the second axis are simultaneously rotated in the same direction and at the same rotational speed, and the second axis is moved parallel to the first plane, A Y-axis machining method characterized in that machining is controlled using an axis perpendicular to the axis and the third axis as the Y-axis. 2. When controlling the processing, the distance between a second plane that includes the second axis and is orthogonal to the first plane and a third plane that includes the first axis and is orthogonal to the first plane is defined as X. , a fourth plane including the first axis and perpendicular to the third axis;
a fifth plane that includes the axis and is perpendicular to the fourth plane, and A is a value obtained by perpendicularly projecting the distance between the second axis and the first axis to the fifth plane, and the fifth plane If the distance between the plane and the first axis is Y, the distance between the fifth plane and the second axis is B, and the angle between the first plane and the third axis is θ, then the following equation is always satisfied. The Y-axis machining method according to claim 1, wherein the Y-axis machining method is made to hold true. X^2+B^2=(Y-B)^2+A^2 θ=tan^-^1 [AB-X(B-Y)]/[AX+
B (B-Y)]