JPH05341829A - Controller for pentahedral processing machine - Google Patents

Abstract

PURPOSE:To automatically calculate the coordinates in a controller when a table is turned with a pentahedral processing machine. CONSTITUTION:A sloping surface having an optional angle is machined by a pentahedral processing machine with turning of a head and a table. It is desirable that the coordinates can be observed even on the sloping surface. The coordinates of the original point of a work 30 are measured by a measuring tool before a table 35 holding the work 30 is turned. When the table 35 is turned by an angle phi, the coordinates (ZM, XM) of the work original point vary but the coordinates (ZMT, XMT) of the table center have no change to the original point of a machine. Then the coordinates (ZM, XM) are calculated in a controller so that the coordinates can be measured in the same way as a normal rectangular surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of coordinate measurement of an oblique surface in a five-side processing machine having the capability of processing the oblique surface of a work.

[0002]

2. Description of the Related Art A 5-axis control machining machine for machining five surfaces including a slant surface of a work, which is equipped with a spindle head which revolves around an axis inclined with respect to machine coordinates, and a rotary table, is disclosed in Japanese Patent Application No. It has already been proposed by the applicant as 181522.

[0003]

In this type of five-face machining machine, the table is rotated together with the spindle head to perform the machining of the oblique plane. By attaching a measuring tool to the main spindle, it is possible to measure the required position on the workpiece. However, since the table turns during machining of an oblique surface, the work coordinates with respect to the machine origin change depending on the turning angle of the table, making coordinate measurement difficult. The present invention has a function of automatically converting coordinates according to the turning angle of the table.

[0004]

A five-face processing machine embodying the present invention comprises a frame, a column on the frame, and a head support member that moves in a direction perpendicular to the column,
An upper surface of a work mounted on the table, including a main spindle mounted on the head support member, and means for rotating the table around a rotation axis having a table on the frame and perpendicular to the table surface. And the ability to machine the sides. The control device includes a control unit that converts the program coordinates used for machining the workpiece into machine coordinates and a control unit that converts the measured coordinates measured on the table before turning into the coordinates on the table after turning. Section.

[0005]

By providing the above means, the coordinate measurement can be easily performed in the processing similar to that of the right-angled surface when processing the oblique surface.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A five-face processing machine 1 for carrying out the present invention has a bed 2 as shown in FIG. 1, and a front portion of the bed 2 in the figure has a linear guide bearing or the like as a guide means. Of the plurality of guide rails 3A, which are the left and right directions in the drawing, are indicated by arrows A and B.
It is provided parallel to the direction (that is, the X-axis direction). A work supporting device 26 is provided on these guide rails 3A, and the work supporting device 26 has a base 5 and the like. The base 5 is provided so as to be movable in the directions of arrows A and B (X-axis direction) via a plurality of nuts 3b, and a table 35 formed in a substantially square shape is provided on the base 5. Is provided so as to be swingable in the directions of arrows P and Q about the rotation center CT1. Table 35
In the upper part of the figure, the work mounting surface 35a on which the work is mounted is mounted.
Are formed. In addition, a tool stocker 41 that stores various kinds of tools 31 is provided on the rear side of the bed 2 in the figure, and a magazine 42 is formed in the tool stocker 41 so that a plurality of tools 31 can be selectively attached to and detached from a groove-like groove. It is provided in. The magazine 42 is provided with a tool transport chain 42a composed of a conveyor or the like so as to be movable along the groove, and the tool transport chain 42a has a hole-shaped tool storage portion 42b in which the tool 31 can be detachably attached. It is provided in.

Further, in the center of the bed 2 in the figure, a guide rail 3C composed of a plurality of linear guide bearings or the like which is a guide means is provided with arrows C and D which are directions orthogonal to the directions A and B.
The column 6 is provided parallel to the direction (that is, the Z-axis direction), and the column 6 is provided on the guide rail 3C so as to be movable and movable in the directions of the arrows C and D (Z-axis direction).

On the side surface 6b of the column 6 (the surface parallel to the directions of arrows C and D), the tool changer 49 is configured to be able to drive the shifter swivel portion 49a in the directions of arrows R2 and S2 about the swivel center SA2. A tool changer 49 is provided
Has a tool gripping device 45 including an arm 46 and the like. The arm 46 has an arrow R centered on the turning center SA1.
It is provided so that it can be swivel-driven in the S1 and S1 directions.

Further, on the front surface 6a of the column 6, a guide rail 3B composed of a plurality of linear guide bearings or the like which is a guide means is provided in the arrow E and F directions (that is, the Y-axis direction) which are vertical directions in the drawing. They are provided in parallel, and a headstock 9 is provided on the guide rail 3B so as to be movable in the directions of arrows E and F (Y-axis direction). The headstock 9 has a head support 10 and a head 19, and the like.
In the direction of arrows G and H about a rotation center CT3 provided with the head 19 tilted by a predetermined angle of 45 degrees with respect to a horizontal plane formed by the Z axis and the X axis via the turning drive mechanism 17. It is provided so that it can be swiveled.

The head supporting portion 10 is, as shown in FIG.
The main body 11 includes a drive shaft 12, a turning drive mechanism 17, and the like. The main body 11 includes a front surface 6 of the column 6 shown in FIG.
It is provided in a in a manner so as to be movable and driven in the directions of arrows E and F (that is, the Y-axis direction), which are the up and down directions in the figure, via a guide rail 3B which is a guide means. As shown in FIG.
As shown in, the engaging holes are in the directions of arrows C and D (Z-axis direction).
With respect to a predetermined angle α (α = 45 ° in this embodiment)
The stepped rod-shaped swivel shaft 12 is provided in the engagement hole through a bearing 13 such as a cross roller bearing (hereinafter, swivel center CT) in the engagement hole.
It is called 3. 2) is inclined by a predetermined angle α with respect to the arrow C and D directions (Z axis direction) in FIG. 2 and is rotatable in the arrow G and H directions about the swing center CT3.

As shown in FIG. 2, the turning shaft 12 is provided with an engaging hole so as to engage the turning shaft 12 along the turning center CT3. A turning drive mechanism 17 is connected to the turning shaft 12. The swing drive mechanism 17 includes the main body 1
The servo motor 40 supported on the first side is provided, and the gear 41 attached to the output shaft of the servo motor 40 meshes with the gear 42 of the turning shaft 12. Therefore, the servo motor 40
The swivel shaft 12 swivels in the G and H directions about the axis CT3 by a predetermined angle in accordance with the rotation angle. A casing 20 is attached to the tip of the swivel shaft 12 to form a swivel head 19. In the casing of the swivel head 19, the spindle speed is 22 and the axis CT by the pairing 23.
It is supported rotatably in the J and K directions about 5.

The head supporting portion 10 supports a servo motor 25 for driving the spindle. The output shaft 26 of the servomotor 25 drives an intermediate shaft 27 rotatably supported in the casing 20 of the turning head 19 via a bevel gear 26a. The intermediate shaft 27 also drives a gear 28 integral with the spindle 22. With this configuration, the spindle 22 is rotationally driven. A tapered tool holding surface 22a for attaching the shank of the tool 31 is formed at the tip of the spindle. A drawbar 29 is arranged in the spindle 22 to hold the tool. At the side of the main body 11 of the head support portion 10, a drawbar 29 of the spindle 22 is provided at the time of automatic tool change.
Press device 10 for pressing a tool to enable removal of a tool
Equipped with 0.

By the way, as shown in FIG. 1, a machining control device 50 is mounted on the five-face machining machine 1, and the machining control device 50 has a main control section 51 as shown in FIG. ing. An input unit 53 such as a keyboard, a system program memory 54, a machining program memory 55, a machining control unit 56, and an axis control unit 5 are connected to the main control unit 51 via a bus line 52.
7, a buffer memory 58, a program coordinate conversion analysis control unit 60, a basic coordinate conversion analysis control unit 61, etc. are connected. The program coordinate conversion analysis control unit 60 calculates the amount of turning of the head 19 and the table 35 according to the inclination of the slope when processing the processing surface of the work, and the processing result is calculated by the processing control unit. It is provided so that it can output to 56. Further, in the axis control unit 57, the X-axis drive motor 65 moves the base 5 in the X-axis direction (arrow A in FIG. 1,
The encoder 65a is provided in the X-axis drive motor 65 so as to feed back the rotation angle amount of the X-axis drive motor 65 to the axis controller 57. Further, a Y-axis drive motor 66 is connected to the axis control unit 57 so as to move and drive the headstock 9 in the Y-axis direction (directions E and F in FIG. 1). Is provided in a form in which the encoder 66a feeds back the rotation angle amount of the Y-axis drive motor 66 to the axis control unit 57. Further, the axis control unit 57 has a Z
A shaft drive motor 67 is connected to drive the column 6 so as to move the column 6 in the Z-axis direction (directions C and D in FIG. 1).
The shaft drive motor 67 is provided with an encoder 67a in a form of feeding back the rotation angle amount of the Z-axis drive motor 67 to the shaft control unit 57.

Further, an α-axis drive motor 40 is connected to the axis control unit 57 so as to move the head 19 in the α-axis direction (directions of arrows G and H in FIG. 1) to drive the α-axis drive motor. An encoder 68 a is provided in the α-axis drive motor 40.
It is provided in a form in which the rotation angle amount of is fed back to the axis control unit 57. Further, the B-axis drive motor 69 is connected to the axis control unit 57 so as to move and drive the table 35 in the B-axis direction (arrow P and Q directions in FIG. 1). An encoder 69a is provided so as to feed back the rotation angle amount of the B-axis drive motor 69 to the axis control unit 57.

Since the five-face processing machine 1 according to the present invention has the above-described structure, first, in order to machine a work using the processing machine 1 shown in FIG.
It is mounted on the workpiece mounting surface 35a. Next, a tool such as an end mill used for processing is mounted on the spindle 22 via the tool holding surface 22a and the like. Then, in order to define the positional relationship of the machining surface (work coordinate) of the workpiece with respect to the machining machine 1 (machine coordinate), the reference condition BCT of the workpiece to be machined is input via the input unit 53 shown in FIG. Then, the surface definition condition PDT is input and stored in the machining program memory 55 while being stored in the buffer memory 58. The reference condition BCT is composed of a reference coordinate BCO for associating the positional relationship between the coordinate system of the whole work to be machined and the machine coordinate system of the processing machine 1, and the surface definition condition PDT is the reference coordinate BCT.
In the coordinate system defined by CO, the surface definition coordinates PCO that define the work coordinates of each machining surface to be machined
Consists of.

First, as shown in FIG. 4, X, Y, and Z coordinates which are machine coordinate systems (in FIG. 1, arrow A, B directions, arrow E,
In the F direction and the arrows C and D directions), an absolute certain point of the processing machine 1 is set as a machine origin MO. Then, the reference origin BP of the reference coordinates BCO is set to one point of the work 30 as shown in FIG. 4, and the reference origin BP is set to the X, Y, Z coordinate system X,
A reference origin BP and a coordinate system based on the reference origin BP are defined by the Y and Z components. That is, in the example of FIG. 4, the reference origin BP is X0 for the X component, Y0 for the Y component, and Z for the Z component.
It is 0. The coordinate axes WX, WY, WZ of the coordinate system having the reference coordinate BCO as the origin are the axes having the angle MB around the Y axis with respect to the X axis in the plane parallel to the XZ plane.
An axis that is perpendicular to the XZ plane and is orthogonal to the WX axis and passes through the reference origin BP is a WY axis, and an axis that is orthogonal to the WX axis in a plane parallel to the XZ plane and is an axis that passes through the reference origin BP is a WZ axis. The angle MB is a rotation angle around the Y axis of the WX-WY plane, where the clockwise direction is positive with respect to the XY plane. Further, the angle MA is an angle that does not consider the sign around the X axis with the Y axis as a reference, and indicates the rotation angle of the WX-WY plane with respect to the XY plane. That is, in the example of FIG. 4, WX of the coordinate system
In the -WY plane, the angle component of the angle MB is B0, so X
Is rotated in the positive direction by an angle B0 with respect to the -Y plane,
The WX-WY plane is perpendicular to the XY plane and the angle MA is 0 with respect to the XY plane.

As described above, in order to specify the reference coordinates BCO, these components of the reference origin BP are input as the reference coordinates BCO from the input unit 53 shown in FIG. That is, in the reference condition BCT shown in FIG.
The digit "X" in the middle indicates "X" as the data BD1 of the X component.
"0", "Y0" as the Y component data BD2 for the "Y" digit, "Z0" as the Z component data BD3 for the "Z" digit, and the Y axis rotation for the "MB" digit. "B0" is input as the data BD4 of the angle component of "," and "0" is input as the data BD5 of the angle component of the X axis around the digit of "MA" via the input unit 53 shown in FIG. To store.

Next, when the reference coordinate BCO is designated, the work coordinate of each machining surface of the work with respect to the designated reference coordinate BCO is defined. That is, the surface definition coordinates PCO are, as shown in FIG.
,,, the lower left point of these corner surfaces (indicated by the black-painted square portion in the figure) is temporarily set as the work origin W1, W2, W3, W4, W5, W6 of each machining surface. Then, the work origin of each of these machining surfaces is defined by the WX, WY, and WZ components of the reference coordinate BCO shown in FIG. Further, the angle WB is an angle whose positive direction is clockwise with respect to the WX axis with respect to the WY axis, and the WX around the WY axis perpendicular to the XZ plane forming the work mounting surface 35a of the table 35 between the surfaces of the respective machining surfaces. Indicates the angle with respect to the axis. Also, the angle W
A is an angle that does not consider the sign around the WX axis with respect to the WY axis, and indicates the angle that each of the machining surfaces forms with the XZ plane formed by the work mounting surface 35a of the table 35.

For example, in an example of the work 30 shown in FIG. 4, when the work 30 has a size as shown in FIG. 5B, first, the work origin W1 of the machined surface is
WX component is -150, WY component is 0, WZ component is 0, W
The angle component WB around the WY axis with respect to the X axis is 0, WY
The angle component WA around the WX axis with respect to the axis is 0. Similarly, the workpiece origin W2 of the machined surface is 0 for the WX component, 0 for the WY component, -200 for the WZ component, 180 for the angular component WB around the WY axis, and 0 for the angular component WA around the WX axis. is there. Furthermore, the workpiece origin W3 of the machined surface is W
The X component is 0, the WY component is 0, the WZ component is 0, the angle component WB around the WY axis is -90, and the angle component WA around the WX axis is 0. Further, the workpiece origin W4 of the machined surface is W
X component is -150, WY component is 0, WZ component is -20
0, the angle component WB around the WY axis is 90, and the angle component WA around the WX axis is 0. Further, the workpiece origin W5 of the machined surface has a WX component of 0, a WY component of 100, a WZ component of 0, an angle component WB-90 around the WY axis (the upper surface is input as -90 for convenience), and a WX axis. The angular component WA around is 90. Furthermore, the workpiece origin W6 of the machined surface is
WX component is 0, WY component is 30, WZ component is -200,
The angle component WB around the WY axis is 180, and the angle component WA around the WX axis is 45.

Thus, the workpiece origin W of these machined surfaces
To specify 1, W2, W3, W4, W5, W6,
The component of the work origin of these machining surfaces is defined by the surface definition unit PD
It is input from the input unit 53 as the surface definition coordinate PCO of U.
At this time, it is also possible to omit the reference coordinates (BCO) and directly input the positional relationship with the machine coordinates into the surface definition coordinates (PCO). In the surface definition condition PDT shown in FIG. 6B, as an example, in the case of a surface, the surface definition coordinates PCO
In the "face" digit, "1" is set as the designated machining surface data PNO, and in the "WX" digit, WX component data PD1.
Is "150", the "WY" digit is "0" as the WY component data PD2, the "WZ" digit is "0" as the WZ component data PD3, and the "WB" digit is WY. “0” is set as “W” as the data PD4 of the angle component around the axis.
"0" is input to the digit "A" as the data PD5 of the angle component around the WX axis as the surface data string PS1 via the input unit 53 shown in FIG. 3, and stored in the machining program memory 55. After that, the same is input with respect to the machining planes of the work 30, and finally, the plane definition condition PDT shown in FIG. 6B is completed and stored in the machining program memory 55.

Next, the main control unit 51 is instructed to start machining through the input unit 53 shown in FIG. Then, the main control unit 51 commands the machining control unit 56 to perform machining, and the machining control unit 56 that has received the command reads the machining program from the machining program memory 55 and processes the work 30. .. The machining program is loaded with the surface definition condition PDT input from the input unit 53 by the coordinate conversion analysis control unit 60 of the machining control device 50 shown in FIG. 3, and each machining surface of the workpiece 30 to be machined. Surface to the surface definition coordinates PC in the surface definition condition PDT
Depending on the number of surfaces input to O, machining blocks corresponding to the machining instruction planes of the machining planes of the work 30 are sequentially formed.
The machining data of the machining planes 1 to 3 are described based on the work origin of each machining plane.

Here, the case of processing the slope of the work 30, which is a characteristic of the present invention, will be described. At this time, for example, as shown in FIG. 4, since the inclined surface of the work 30 is inclined at a predetermined angle with respect to the three axes of the X, Y, and Z axes, the tool 31 is adjusted according to the inclination of the surface. Therefore, it is necessary to incline by a predetermined angle with respect to the X, Y and Z axes. Therefore, first, the head 19 shown in FIG.
With the spindle 22 equipped with the tool 31
Regarding the relationship between each degree θ and the angles θx, θy, and θz of the spindle 22 (and therefore the tool 31) with respect to the X, Y, and Z axes in the case of turning by an arbitrary angle θ in the directions of arrows G and H about T3. explain.

That is, as shown in FIG. 7, the symmetry point P1 is the origin O of the X, Y, and Z coordinate axes, and the turning center CT3 (α
Consider a circle with a radius of 1 (hereinafter referred to as a unit circle UC) that is perpendicular to the (axis) and is in contact with the Y axis and the Z axis. The points at which the unit circle UC contacts the Y axis and the Z axis are A and B, respectively. Here, the spindle 22 (that is, the head 19)
Is rotated about the rotation center CT5 in the direction of the arrow G by an angle θ from the state of being positioned on the Z axis, and is positioned at the position indicated by the alternate long and short dash line in the figure. Then, the rotation center CT5 of the spindle 22 also turns in the arrow G direction by the angle θ,
Move from point B to point D along the circumference of the unit circle UC.
At this time, as shown in FIG. 8, from the point D to the XZ plane and YZ
Let G ₁ and E be the feet of the perpendicular drawn on the plane, and F be the feet of the perpendicular drawn from the foot G ₁ to the Z-axis. Θ = ∠BCD, θx = ∠DFG ₁ FG ₁ = DE, DG _{Since 1} = EF = FB, tan θx = DG ₁ / FG ₁ = EF / DE tan θx = EF / DE (Equation 1)

Here, if a perpendicular is drawn from the point D shown in FIG. 7 to the straight line AB and its foot is E, then CD = 1, so DE = CDsinθ = sinθ (Equation 2). In the triangle BEF shown in FIG. 7, FB = EF = EBsin45 ° = (BC-CDcosθ) sin45 ° EF = (1-cosθ) / √2 (Equation 3) Therefore, when (Equation 2) and (Equation 3) are substituted into (Equation 1), tan θx = EF / DE = (1−cos θ) / (√2 · sin θ) is obtained. Therefore, θx = arctan [(1-cos θ) / (√2 · sin θ)] (Equation 4) is obtained.

The angle θy is the triangle OD shown in FIG.
From G ₁ , sin θy = DG ₁ / OD θy = arcsin (DG ₁ / OD) where DG ₁ = EF, EF = (1-cos θ) / √2
Therefore, DG ₁ = (1−cos θ) / √2. Also, since ∠CDO = ∠CBO, ∠CB
From O = 45 °, ∠CDO = 45 °. In the triangle ODC, CD = 1, ∠C
From DO = 45 °, OD = CDtan∠CDO = tan45 ° = √2. Therefore, θy = arcsin (DG ₁ / OD) = arcsin (((1-cos θ) / √2) / √2) θy = arcsin ((1-cos θ) / 2) (Equation 5) is obtained.

Further, the angle θz is a triangle FO shown in FIG.
From G ₁ , tan θz = FG ₁ / OF = DE / OF From the triangle EOF shown in FIG. 8, OF = (1 + cos θ) / √2 From the above equation, tan θz = sin θ / [(1 + cos θ) / √2] = √2 sin θ / (1 + cos θ) Therefore, θz = arctan [√2 · sin θ / (1 + cos θ)] (Equation 6).

Therefore, the above-mentioned angle θ and angles θx, θ
Based on the relationship between y and θz, the cutting edge 31a of the tool 31 protruding leftward in the drawing from the origin O shown in FIG. 8 by a predetermined distance,
The position with respect to the work 30 can be accurately obtained. here,
The angle θy is XZ formed by the work mounting surface 35a of the table 35 of the tool 31 when the head 19 is rotated by the arbitrary angle θ in the directions G and H around the rotation center CT3 together with the spindle 22 on which the tool 31 is mounted. It is not only the inclination about the X-axis with respect to the plane, but also the inclination angle WA of the slope to be machined of the work 30 that is perpendicular to the tool 31 to be machined by the tool 31. Therefore, if the inclination of the slope of the work 30 is regarded as the inclination of the tool 31,
From (Equation 5), the angle θ corresponding to the head turning amount TA2 for turning the head 19 with respect to the angle θy corresponding to the inclination angle WA of the slope of the work 30 can be obtained. That is, from (Equation 5), sin θy = (1−cos θ) / 2 cos θ = 1−2 sin θy θ = arccos (1-2 sin θy) (Equation 7) is obtained.

On the other hand, for the angle θz, the head 19 and the tool 31
Y axis perpendicular to the XZ plane formed by the workpiece mounting surface 35a of the table 35 with respect to the Z axis of the tool 31 when rotated by the arbitrary angle θ in the directions G and H around the rotation center CT3 together with the spindle 22 mounted with In addition to the inclination around the circumference, it is also the amount of rotation from the reference origin BP of the table 35 for compensating that the tool has rotated by θz in order to maintain the vertical state of the tool and the machining surface during machining. Therefore, the angle θz corresponding to the table turning correction amount TA1 that should turn the table 35 from the reference origin BP can be obtained from the angle θy based on the angle θ previously obtained. That is, by substituting the previously obtained θ into (Equation 6), θz = arctan [√2 · sin (arccos (1-2siny)) / (1 + cos (arccos (1-2siny)))] (Equation 8) To get

Therefore, when the slope of the work 30 is processed, the slope angle W of the slope of the work 30 corresponding to the angle θy.
If only A is known, an angle θ corresponding to the head turning amount TA2 for turning the head 19 and an angle θz corresponding to the table turning correction amount TA1 for turning from the reference origin BP of the table 35 are calculated from the angle θy. The tool 31 can be positioned with respect to the slope of the work 30. That is, in the present invention, the coordinate conversion analysis control unit 60 of the machining control device 50 shown in FIG. 3 causes the inclination angle of the slope of the workpiece 30 in the machining program loaded with the surface definition coordinates PCO input from the input unit 53. Based on the data of WA, the angle θ corresponding to the head turning amount TA2 of the head 19 and the angle θz corresponding to the table turning correction amount TA1 of the table 35 are calculated from (Expression 7) and (Expression 8).
Then, the machining control unit 56 shown in FIG. 3 commands the axis control unit 57 to take a predetermined angle based on the calculated value.

As described above, the angle θy corresponding to the inclination angle WA of the slope of the work 30, the angle θ corresponding to the head turning amount TA2 of the head 19, and the angle θz corresponding to the table turning correction amount TA1 of the table 35 are related. When the machining control unit 56 receives the command of the main control unit 51 and recognizes the coordinate conversion command, the processing control unit 56 receives the command from FIG.
In the coordinate conversion analysis control unit 60 shown in FIG. 1, the turning amount of the table 35 and the head 19 is calculated so that the tool 31 can be adapted to the converted coordinates, and the work coordinate system (WX,
WY, WZ coordinates) are converted to a machine coordinate system (X, Y, Z coordinates). The coordinate conversion analysis control unit 60 shown in FIG. 3, which has received the command, defines the surface definition corresponding to each of the machining surfaces of the work 30 loaded in the machining program from the above-mentioned relationship between the work coordinates and the machine coordinates. Coordinate PCO data PD4, PD5 and buffer memory 58
Based on the reference coordinate BCO data BD4 stored in
Table 3 corresponding to each machining surface of the work 30
5 and the turning amount of the head 19 are calculated. Further, the data PD1, PD2, PD3 of the surface definition coordinates PCO corresponding to the WX, WY, WZ coordinates of the surface of each processed surface of the work 30 corresponding to the surface of each processed surface of the work 30 loaded in the processing program. And data BD1, BD2, BD3 of the reference coordinates BCO stored in the buffer memory 58.
To the machine coordinate system (XYZ coordinates).

That is, regarding the turning amount of the table 35, the table turning basic amount TB due to the deviation between the work coordinates and the machine coordinates is set to TB = PD4 + BD4 from the data PD4 of the surface defining coordinates PCO and the data BD4 of the reference coordinates BCO, and
The work mounting surface 35 of the table 35 on the processing surface of the work 30
From the data PD5 of the surface defining coordinates PCO, the table turning correction amount TA1 due to the inclination with respect to a is set to PD5 = θy, and TA1 (= θz) is calculated from (Equation 8). Furthermore,
For the turning amount of the head 19, the head turning amount TA2 due to the inclination of the machining surface of the work 30 with respect to the work mounting surface 35a of the table 35 is calculated from the data PD5 of the surface defining coordinates PCO by P.
TA2 (= θ) is calculated from (Equation 7) with D5 = θy. In this way, the coordinate conversion analysis control unit 6 shown in FIG.
0 indicates the turning amounts TB and TA of the table 35 and the head 19.
After performing the analysis such as the calculation of 1, TA2, the coordinate conversion analysis control unit 60 outputs the analysis result to the processing control unit 56,
Upon receiving the analysis result, the machining control unit 56 instructs the axis control unit 57 to drive the drive motors 69 and 40 by a predetermined amount. Then, the axis control unit 57 which receives the command from the processing control unit 56 drives the B-axis drive motor 69 to move the table 35 shown in FIG. 1 to the table turning basic amount TB (= P).
D4 + BD4) and table turning correction amount TA1 (= θ
z) in the P direction so that the tool faces the machining surface, and the α-axis drive motor 40 is driven to rotate the head 19 shown in FIG. 1 in the G direction by the head rotation amount TA2 (= θ). The center of rotation CT5, and thus the tool, is positioned perpendicular to the machining surface.

Further, the data PD1 of the surface defining coordinates PCO,
From the data BD1, BD2, BD3 of the reference coordinates BCO stored in PD2, PD3 and the buffer memory 58, the work coordinate system (WX, WY, WZ coordinates) is converted to the machine coordinate system (X,
The coordinate conversion analysis control unit 60 shown in FIG. 3 executes the conversion into (Y, Z coordinates) and outputs the calculation result to the processing control unit 56, so that the processing control unit 56 receiving the analysis result causes the axis control The unit 57 is instructed to drive each drive motor 65, 66, 67 by a predetermined amount. Then, the axis control unit 57, which receives the command from the machining control unit 56, causes the machining control unit 5 to move.
Based on the command of No. 6, each drive motor 65, 66, 67 is driven by a predetermined amount. That is, the X-axis drive motor 66 is driven to move the base 5 shown in FIG. 1 by D1 in the X-axis direction,
The Y-axis drive motor 66 is driven to move the headstock 9 shown in FIG. 1 by D2 in the Y-axis direction, and the Z-axis drive motor 67 is driven to move the column 6 shown in FIG. 1 by D3 in the Z-axis direction. Match the cutting edge of the tool with the work origin of the machining surface to be machined.

As described above, the tool 31 can be positioned at the machining start position (work origin) with the cutting edge 31a of the tool 31 vertically facing the machining surface of the work 30.
The machining control unit 56 instructs the axis control unit 57 and the like based on a machining command or the like to drive the spindle 22 and rotate the spindle 22 in the arrow J or K direction together with the tool. Then, the headstock 9 is appropriately moved in the directions of arrows E and F, or the base 5 and the column 6 are driven to move, whereby the tool 3 is moved.
The work 30 is processed by 1. Therefore, the operator does not have to obtain the rotation angle of the head and the rotation angle of the table according to the inclination of the machined surface when machining the machined surface of the workpiece, and the inclination angle of the machined surface of the workpiece is determined. Only by inputting, the head and the table are rotated and positioned according to the inclination of the processed surface.

The present invention is a five-sided machine having the above-mentioned configuration, and provides a function for easily achieving coordinate measurement when processing an oblique surface. 9 and 1
Reference numeral 0 represents a procedure for measuring the work origin of the work 30 mounted on the table 30. First, in a state in which the table 30 is not rotated, the measuring tool 310 is attached to the spindle to measure the workpiece origin coordinates. When the work origin WO is defined as the intersection of the surfaces in FIG. 5 and, the values of the coordinates X and Z of the work origin WO can be calculated from the coordinate values at that time when the measuring tool 310 is abutted on the surfaces. it can.
The value of the coordinate Y of the work origin WO cannot be directly measured. Therefore, first, a measuring tool is applied to the surface to measure the coordinate value of the surface. Next, the dimension Y ₁ of the surface in the Y direction is obtained from the drawing, and the dimension Y ₁ is subtracted from the coordinate value of the surface to obtain the Y coordinate value of the work origin WO.

FIG. 11 and FIG. 12 show the coordinates of the work origin WO before the table is rotated and the change in the coordinates when the table 35 is rotated around the table central axis by an angle φ in order to machine an oblique surface. Show. Since the Y direction does not change even when the table 35 is rotated, the coordinates of the work origin WO change from (Z, X, Y) to (ZM, XM, Y). The coordinates of ZM and XM at this time are calculated by the following equations. ZM = ZMT + | ZMT-Z | cosφ + | XMT-X | sinφ (Equation 9) XM = XMT- | ZMT-Z | sinφ + | XMT-X | cosφ (Equation 10) Therefore, the basics of the machining control device shown in FIG. The coordinate conversion analysis control unit 61 performs the calculations of the above equations 9 and 10 so that the diagonal surface can be treated in the same manner as the vertical surface to perform the coordinate measurement. FIG. 13 shows a case where the coordinates of holes H ₁ , H ₂ , H ₃ , and H ₄ to be machined on an oblique surface are measured, and the coordinates of the holes can be easily measured by detecting the center of each hole with a measuring tool. You can

FIG. 14 shows the flow of control processing. In the basic coordinate conversion processing started in step 1000, it is checked in step 1010 whether or not there is a command for measuring the work coordinate. If the coordinate measurement is instructed, the current tilt angle of the spindle head axis (α axis) is checked in step 1020. If the angle of the α axis is 0 degree or plus or minus 90 degrees, it is not the processing of the oblique surface, and therefore the process proceeds to step 1050. If the angle of the α-axis is other than the above-mentioned angle, it means that the machining is an oblique surface. Therefore, the process proceeds to step 1030, and whether or not the function of the correction angle of the B-axis, which is the rotation axis of the table, is valid (parameter) Check. 103
When the function is enabled at 0, the process proceeds to step 1040, the coordinate conversion process is executed by Formula 1 and Formula 2 when the rotation angle of the table is ψ, the work coordinate is set at Step 1050, and the process is performed at Step 1060. To finish.

[0037]

INDUSTRIAL APPLICABILITY As described above, the present invention is a five-sided machine having the ability to rotate a spindle and a table to machine an oblique surface having an arbitrary angle, and when measuring the coordinates of the oblique surface to be machined. In addition, it has a control function of automatically calculating the coordinates after the table is rotated based on the measured coordinates performed before the table is rotated. Therefore, the operator can easily perform the coordinate measurement as in the case of measuring the normal right-angled surface, and can improve the machining efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a five-side processing machine according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a main part of a headstock of the five-face machining machine shown in FIG.

FIG. 3 is a diagram showing an example of a control block of a machining control device mounted on the five-face machining machine shown in FIG. 1.

FIG. 4 is a diagram showing an example of definition of coordinates.

5 is a diagram showing an example of coordinate data of the work shown in FIG.

FIG. 6 is a view showing an example in which the coordinates of each processing surface of a work are defined for the 5-axis control processing machine shown in FIG. (A) is a figure which shows a reference condition. (B) is a figure which shows a surface definition condition.

FIG. 7 is a diagram showing angles between a spindle mounted on a head and X, Y, and Z axes.

FIG. 8 is a diagram showing angles between a spindle mounted on a head and X, Y, and Z axes.

FIG. 9 is an explanatory diagram showing a method of measuring the workpiece origins X and Z before the table is rotated.

FIG. 10 is an explanatory diagram showing a method of measuring the workpiece origin Y before the table is rotated.

FIG. 11 is an explanatory diagram showing the relationship between the work origin and the machine origin before the table is rotated.

FIG. 12 is an explanatory diagram showing a relationship between a work origin and a machine origin after the table is rotated.

FIG. 13 is an explanatory diagram showing coordinate measurement of an oblique surface.

FIG. 14 is a flowchart of control processing.

[Explanation of symbols]

 2 frame (bed) 10 head support means (head support part) 19 head 22 tool spindle (spindle) 30 work piece 35 table 40 head rotation drive means (α axis drive motor) 55 memory means (machining program memory) 56 drive means (machining) Control unit) 57 drive means (axis control unit) 60 program coordinate conversion analysis control unit 61 basic coordinate conversion analysis control unit 69 table turning drive unit (B-axis drive motor) MA tilt angle (angle) MB rotation angle (angle) WA tilt Angle (angle) WB Rotation angle (angle) BCT Machining surface angle information (reference condition) PDT Machining surface angle information (surface definition condition) TA1 2nd turning angle (table turning correction amount) TA2 1st turning angle (head turning amount) TB 2nd turning angle (table turning basic amount) CT1 2nd turning axis (rotation center) CT3 1st Rotation axis (rotation center) CT5 Tool rotation axis (rotation center)

Claims (1)

[Claims] 1. A frame, a head supporting member having a column on the frame and moving in a direction perpendicular to the column, a main spindle mounted on the head supporting member, and a table on the frame. A five-sided machine capable of processing an upper surface and a side surface of a workpiece mounted on the table, which has a means for rotating the table around a rotation axis perpendicular to the table surface. The control device includes a control unit that converts the program coordinates used for machining the workpiece into machine coordinates, and a control unit that converts the measured coordinates measured on the table before turning into the coordinates on the table after turning. A control device for a five-sided machine.