JPH05162002A - Combined machine tool with detector for dimension and position of work to be machined - Google Patents

Abstract

PURPOSE:To automate the setting of a machining start point in a combined machine tool provided with a grinding unit, by detecting the dimension and position of a work. CONSTITUTION:A combined machine tool is provided with a machining mill unit and a grinding unit. A turret type tool box 65 is provided on the machining mill unit 60. The tool box 65 is also provided with a touch sensor tool 652. An opposed main spindle 35 holds a work 80. The work and the tool box are made to come close to each other, and when the probe 653 of the touch sensor tool 652 touches the work, the touch sensor tool 652 outputs a signal. The signal is sent to a measurement processing part 918 through a circuit 919, and the dimension and position of the work 80 are detected. An NC device determines the grinding work start point based on the data of the work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the size and position of a work piece in a multi-tasking machine equipped with a cutting unit and a grinding unit.

[0002]

2. Description of the Related Art A machine equipped with a turning mill unit and a grinding unit on the same machine for performing turning and grinding has already been proposed by the present applicant. In the grinding process, the machining starting point is accurately determined, and the feed rate is controlled from the machining starting point to the grinding feed rate. If the distance between the machining start point and the position where the grindstone actually contacts the work is large, extra time will be required for air cutting, and if the distance is insufficient, the grindstone will collide with the work in the rapid feed state. To reduce the time of air cut by detecting the state where the tool is actually cutting the work by an acoustic emission sensor (AE sensor) is disclosed in, for example, Japanese Patent Laid-Open No. 61-26.
It is disclosed in Japanese Patent Publication No. 0976. In addition, the one using the same technique for dressing the whetstone is the actual Kaisho 62-1.
17063.

[0003]

What is disclosed in the above publication is to detect the state where the tool is cutting the work and the state where the dressing tool is in contact with the grindstone. The multi-tasking machine for carrying out the present invention is
A turning mill unit and a grinding mill unit are provided on the same machine. Therefore, in the present invention, the size and position of the work held by the spindle is detected by the size and position detection means provided in the processing machine to minimize the air cut by the grinding unit and prevent the collision between the grindstone and the work. It is a thing.

[0004]

In the apparatus of the present invention, a turret type tool rest provided in a turning mill unit is equipped with a size and position detecting means. When the size and position detecting means comes into contact with the work held by the main shaft, the size and position detecting means emits a signal, and the NC device detects the signal and detects the size and position of the work.

[0005]

The composite processing machine recognizes the size and position of the work and updates the starting point of the grinding process. By this process, the air cut is shortened to the minimum and the processing efficiency is improved.

[0006]

1 is a plan view of a combined machining machine 1 of the present invention.
FIG. 2 is a front view. The multi-tasking machine 1 has a bed 10
And a table 20 that slides in the direction of the axis Z1 while being guided by the first guide surface 12 disposed on the bed 10. A first headstock 30 is mounted on the table 20,
A first headstock 30 is equipped with a first headstock 30. First
The main shaft 35 of is rotatable about the rotation axis C1 and its rotational position is controlled. A base 22 is provided on the table 20, a second guide surface 21 is provided on the base 22, and a second headstock 50 is slidably arranged along the axis Z2. The second spindle 55 mounted on the second headstock 50 is rotatable about the rotation axis C2 and its rotational position is controlled. The movement axis Z1 of the table 20 and the movement axis Z2 of the second headstock 50 are parallel to each other. Bed 1
0 is orthogonal to the first guide surface 12 along the axis Z1 and
The guide surface 14 is provided, and the turning mill unit 60 is slidably mounted on the third guide surface 14 along the moving axis X1. The turning mill unit 60 is a turret type tool post 6
5 is provided. A fourth guide surface 16 is further arranged on the bed 10 in parallel with the third guide surface 14, and the grinding unit 70 is slidable along the movement axis X2 on the fourth guide surface 16. To be equipped with. The grinding unit 70 is movable along the axis X2, and is mounted so as to be rotatable about an axis B perpendicular to a plane formed by the axis X2 and the axis Z1 and to control the rotating position.

The grinding unit 70 includes an outer polishing unit 74 for grinding the outer diameter portion of the work and an inner polishing unit 76 for grinding the inner diameter portion of the work. Grinding unit 70 has axis X
It has a fifth guide surface 71 which is perpendicular to the surface formed by 2 and the axis Z1, and an internal polishing unit 76 is slidably mounted along the movement axis Y on the fifth guide surface. A grinding head such as an external grinding unit or an internal grinding unit equipped in the grinding unit can be configured to be attached to a turret type head.
The tool rest of the turning mill unit and the grinding head of the grinding unit are arranged back to back. Combined processing machine 1 of the present invention
Are four movement axes Z1, Z2, arranged on the same plane.
It has a total of eight control axes X1, X2, a movement axis Y perpendicular to this plane, and three rotation axes C1, C2, B.

FIG. 3 is a plan view showing the composite working machine 1 in more detail. 4 is a front view, FIG. 5 is a view taken in the direction of arrow H in FIG.
FIG. 6 is a view on arrow K in FIG. The linear guide 130 mounted on the table 20 is slidably engaged with the first guide surface 12 mounted on the bed 10. Bed 1
The first servomotor 110 attached to 0 controls the rotation of the ball screw 120, and the ball screw 120 moves to the table 2
Screw to 0. Therefore, the movement speed and movement position of the table 20 on the axis Z1 are controlled according to the rotation speed and the rotation amount of the servo motor 110. A first headstock 30 fixed to one end of the table 20 rotatably supports a first main shaft 35. The second servomotor built in the first headstock 30 controls the rotational speed and rotational position of the first spindle 35 about the axis C1. The linear guide 230 attached to the second headstock 50 slidably engages with the second guide surface 21 attached to the table 20. Third servo motor 21 attached to the other end of the table 20
0 controls the rotation of the ball screw 220. The ball nut attached to the second headstock 50 is screwed into the ball screw 220, and the second headstock 50 moves on the axis Z2 according to the rotation speed and the rotation amount of the third servomotor 210. The movement position is controlled. The second spindle stock 50 rotatably supports the second spindle 55. The fourth servomotor built in the second headstock 50 controls the rotational speed and rotational position of the second spindle 55 around the axis C2. Combined processing machine 1
A tool tip position measuring device 170 for measuring the tool tip position of the cutting tool attached to the tool rest and a work measuring device 180 for measuring the dimension of the work are provided on the upper part.

In FIG. 5, the fifth servomotor 610 mounted on the bed 10 controls the rotation of the ball screw 620. The linear guide 625 attached to the turning mill unit 60 is the third guide surface 14 fixed on the bed 10.
And the ball nut 630 of the turning mill unit is screwed onto the ball screw 620. Therefore, the turning speed and the moving position of the turning mill unit 60 are controlled on the axis X1 according to the rotation speed and the amount of rotation of the servo motor 610. The turning mill unit 60 includes a turret type tool rest 65. The tool rest 65 has, for example, twelve tools 650 exchangeably mounted around it. The tool 650 is
Tools for turning and rotating tools for milling can be used. Various turning tools and rotary tools 6 equipped on the turret 65
50 can be used to perform various types of processing on the workpiece.

In FIG. 6, a sixth servomotor 710 attached to the bed 10 controls the rotation of the ball screw 712. Linear guide 7 attached to grinding unit 70
The ball nut 7 of the grinding unit 70 is engaged with the fourth guide surface 16 fixed on the bed 10.
16 is screwed into the ball screw 712. Therefore, the movement speed and the movement position of the grinding unit 70 on the axis X2 are controlled according to the rotation speed and the rotation amount of the servo motor 710. The grinding unit 70 is controlled along the axis X2 and can index around the axis B. And
An external polishing unit 74 and an internal polishing unit 76 are provided at diagonal positions of the grinding unit 70. The external polishing unit 74 includes an outer diameter grinding wheel 750. The tip of the outer diameter grinding wheel 750 is
It revolves around the axis B with a radius R1. The internal polishing unit 76 includes an inner diameter grinding wheel 770. Inner diameter grinding wheel 7
The tip of 70 pivots about axis B with radius R2.

FIG. 7 is a plan view of the grinding unit, and FIG. 8 is a view on arrow M of FIG. The grinding unit 70 includes a motor 74
The motor 740 rotates the external grinding wheel 750 of the external polishing unit 74. A fifth guide surface 71 fixed to the outer peripheral portion of the grinding unit 70 slidably supports the internal polishing unit 76. The seventh servomotor 760 attached to the grinding unit 70 controls the rotation of the ball screw 764 via the timing belt 762. Internal Research Unit 76
The ball nut 766 attached to the
Screw into. Therefore, the moving speed and the moving position of the internal polishing unit 76 on the axis Y are controlled according to the rotating speed and the rotating amount of the servo motor 760. A motor 775 attached to the internal polishing unit 76 drives the internal polishing grindstone 770. FIG. 9 is an explanatory view showing a turning mechanism around the axis B of the grinding unit 70 and is a sectional view half-mounted from the center line. The base 700 of the grinding unit 70 has a linear guide 714.
It is slidably supported on the guide surface 16 arranged on the bed via. The base 700 is a cross roller bearing 724.
The swivel base 720 is rotatably supported via. Swivel 7
The shaft 722 provided at the center of the bush 20 is inserted into the hole of the bush 702 attached to the base 700.
A coupling such as cutting oil is formed between the shaft and the shaft 722. The base 700 is equipped with an eighth servo motor (not shown), and the worm gear 730 is rotationally controlled by this eighth servo motor. The worm gear 730 is a worm wheel 726 formed integrally with the swivel base 720.
And the swivel 720 is indexed. Swivel 720
The brake plate 728 is provided, and the brake plate 72
Grasp 8 with a hydraulic cylinder and clamp the swivel in the indexed position. The swivel 720 is the motor 74 of the external research unit.
0 and the internal polishing unit 76 are supported, and the motor 740 drives the spindle 742 for mounting the external polishing grindstone.

As described above, the present composite machining machine 1 is provided with the two headstocks which are arranged so as to face each other and whose axial movements are controlled independently of each other, so that the first headstock and the second headstock are provided. The headstock of can jointly handle a long shaft.
In addition, the workpiece processed in the first step with the first headstock is
Since the second step can be processed by handing over to the headstock, the workpiece having a complicated shape can be produced with high accuracy in a short time. Furthermore, since it is equipped with a turning mill unit and a grinding unit for cutting the hardened work, it is suitable for the production of parts such as spindles that have high surface hardness and require highly accurate processing. The grinding range can be further increased by preparing a unit for changing the mounting direction of the grindstone of the internal polishing unit 76 by 180 degrees.

FIG. 10 is a block diagram showing the entire control device of the present combined machining machine. The control device, which is generally denoted by reference numeral 90, includes a main control unit 900 and various control elements connected via a bus 910. As control elements, a keyboard 912, an image display device 914, a work measuring device 1
80 control device 916 and measurement data processing unit 918,
Programmable controller interface 92
0, program memory 922, data memory 92
4, parameter memory 926, external storage device 930
And an input / output processing unit 928 for an external storage device. As the servo motor control unit, a table position (Z1) control unit 950 of the table servo motor 110, a C1 axis control unit 952 of the first spindle servo motor 31,
A position (Z2) control unit 954 of the second spindle head servo motor 210 and a C2 axis control unit 956 of the second spindle servo motor 51 are provided. Further, the servomotor 31 of the first spindle and the spindle connected to the tool rest, the mill axis controller 960, the turning unit position (X1) controller 9 of the servomotor 610.
62, internal polishing unit position (Y) control unit 970 of servo motor 760, main shaft connected to servo motor 51 of second main shaft and grinding unit, grinding wheel shaft control unit 964, grinding unit position (X2) control of servo motor 710 And a grinding unit turning position (B) control unit 972. As described above, this combined machining machine has a total of eight control axes and performs complicated machining.

FIG. 11 shows a plan view and a side view of the grinding unit 70. The internal polishing unit 76 provided in the grinding unit 70 has a guide portion 774 that engages with a guide surface 71 provided in the grinding unit 70, and moves along the axis Y.
The motor 775 of the internal grinding unit drives the internal grinding wheel 770 attached to the spindle 776 to execute internal grinding.
In the standard internal polishing unit 76, the orientation of the internal polishing wheel 770 is
The external polishing unit 74 is arranged symmetrically with respect to the external polishing stone 750. In addition to this standard internal polishing unit 76, the first replacement internal polishing unit 76A shown in FIG.
The spindle 776A to which 70A is attached is installed on the opposite side of the spindle 776 of the standard internal polishing unit 76 by 180 degrees. By internally slidably attaching the first exchanged internal polishing unit 76A to the guide surface 71 via the guide portion 774A, internal polishing of the workpiece chucked by the second spindle can be performed. FIG. 13 shows a second exchange internal polishing unit 76B. This internal research unit 76B
Is arranged in a direction in which a spindle 776B that drives a grindstone 770B is rotated 90 degrees with respect to the spindle 776 of the standard unit 76. By using the replacement internal polishing unit 76B, it is possible to grind, for example, a cam groove provided on the surface of the work. Then, the present multi-tasking machine is configured such that the first main spindle 35 and the second main spindle 55, which are arranged opposite to each other, are provided.
Since the work is transferred between the two spindles, the turning and grinding of the entire work can be accomplished in a short time without setup.

FIG. 14 shows an example of a work 80. This work 80 is a stepped cylindrical member having a small diameter portion 810 and a large diameter portion 820, and an outer peripheral surface 812 of the small diameter portion 810 and a large diameter portion 820. The outer peripheral surface 822 and the inner peripheral surface 830 are ground. In a grinding machine equipped with a single spindle, after the large diameter portion 820 is chucked and the outer peripheral surface 812 and the inner peripheral surface 830 of the small diameter portion 810 are machined, the small diameter portion 8 is processed.
It is necessary to chuck 10 again and perform external polishing of the outer peripheral surface 822 of the large diameter portion 820. In this machine, the work can be automatically transferred between the spindles to complete the above-mentioned process.

FIG. 15 shows the large diameter portion 820 of the work 80 as a first portion.
The state in which the main shaft 35 is chucked is shown. The first spindle 35 rotates the work 80 around the axis C1 and the table is traversed in the direction of the axis Z1. Since the grinding unit 70 is fed in the direction of the axis X2, the axes C1, Z
By controlling 1 and X2 at the same time, the outer peripheral surface 812 of the small diameter portion 810 of the work 80 can be processed by the grindstone 750 of the external polishing unit. Next, the grinding unit is rotated 180 degrees around the axis B to move the internal polishing unit 76 to the work 8
The inner peripheral surface 830 is processed so as to face the 0 side. First of processing
When the process is completed, the work 80 is transferred to the second spindle 55 side. The second main shaft 55 moves on the table in the Z2 direction and grips the small diameter portion 810 of the work 80. After that, the chucking of the first main spindle 35 is released, and the second main spindle 5 is released.
5 retreats to a predetermined position.

FIG. 16 shows this state, in which the outer peripheral surface 822 of the large-diameter portion 820 of the work is processed by the external grinding stone 750. In the case of this machining, the control axis is the feed axis Z1 of the table,
It serves as the rotation axis C2 of the second main shaft 55 and the feed axis X2 of the grinding unit 70.

Since the grinding unit 70 of the present combined machining machine is capable of swivel indexing around the axis B with respect to the base 700, various grinding processes can be achieved. When the indexing angle around the axis B is counterclockwise in the positive direction on the plan view, FIG. 17 shows a state of turning by −A degrees from the reference position. At this indexing position, using the external grinding wheel 750, the axis Z
By controlling 1 and X2 at the same time, the outer surface of the tapered portion 815 of the work 81 can be ground. The taper angle is 2 A degrees. FIG. 18 shows a state where the turning position of the grinding unit 70 is returned to the reference position (0 degree). At this position, machining of the outer peripheral surface or the inner peripheral surface that is straight with respect to the work 82 is achieved.

FIG. 19 shows a grinding unit 70 as a base 700.
The figure shows a state of turning by A degrees in the positive direction. At this position, the outer grinding wheel 750 is used to grind the taper portion 835 gripped on the second spindle side. The taper angle is 2A
It becomes degree. FIG. 20 shows a state in which the grinding unit 70 is rotated 90 degrees in the positive direction with respect to the base 700. No machining is performed at this position. FIG. 21 shows a state in which the grinding unit 70 is turned to an obtuse angle of B degrees. Equipped with the first replacement unit 76A as an internal grinding unit, the internal grinding wheel 7
The taper surface 845 of the work 84 gripped by the second spindle is processed by 70A. The taper angle is 2 × (180 degrees-
B degree).

FIG. 22 shows the grinding unit 70 rotated 180 degrees. By equipping the standard unit 76, the inner peripheral surface 855 of the work 85 gripped by the first spindle.
To process. By mounting the first replacement unit 76A instead of the standard unit 76, the inner grinding wheel 770A is used to machine the inner peripheral surface 865 of the work 86 gripped by the second spindle. FIG. 23 shows a grinding unit 70 180
It shows a state of turning at an angle of C degrees or more. The standard unit 76 is attached, and the taper inner peripheral surface 875 of the work 87 gripped by the first spindle by the internal grinding wheel 770 is processed. The taper angle is 2 × (C degree−180 degree). Next, a processing method for performing the movement control of the internal polishing unit in the Y direction will be described.

24 and 25 show a cylindrical work 88.
The case where the key 882 protruding from the end face of is ground is shown. The work 88 is held by the first spindle 35,
A standard unit 76 is provided in the grinding unit 70 as an internal polishing unit. By shifting the internal polishing unit 76 along the axis Y by the distance Y10, both side surfaces 882A and 882B of the key 882 can be ground by the internal polishing grindstone 770.

26 and 27 show a case where a cam groove 892 is formed on the outer peripheral surface of a shaft-shaped work 89. The work 89 gripped by the first main shaft 35 is controlled around the first rotation axis C1. The width dimension of the cam groove 892 is larger than the diameter dimension of the internal grinding stone 770B. A second exchange unit 76B is provided as an internal polishing unit, and is shifted along the axis Y by a distance Y20 to machine one wall surface 892A of the cam groove 892. The unit is also shifted along the axis Y by a required distance when the other wall surface 892B of the cam groove 892 is machined.

FIG. 28 shows a second device equipped with a dressing device.
29 is a front view of the headstock 50 of FIG. The dressing device 52 includes the casing 50 of the second headstock 50.
Of 0, it is fixed to the wall surface 502 facing the grinding unit. The second headstock 50 is slidably supported on a guide surface 21 provided on the table 20 via a linear guide 220, and the second headstock has a second headstock 55 and a first headstock 35. It moves on the guide surface when the work is transferred between and. The movement of the entire table 20 is controlled during processing and dressing.

FIG. 30 shows a method and means for performing dressing of the external grinding stone 750 by the dressing device 52. The dressing device 52 has a main body 520 fixed to the wall surface 502 of the casing 500 of the second headstock 50. The main body 520 has a substantially rectangular planar shape and protrudes from the casing, and includes three dressing members. Body 52
The tip of 0 is formed on the first inclined surface 522, and the first dressing member 530 is embedded perpendicularly to the inclined surface 522 of the tip. The dressing member 530 has diamond or the like at its tip. First dressing member 530
Dresses the outer peripheral surface 752 of the external grinding stone 750. The arrow indicates the feed direction of the grindstone during dressing. A second inclined surface 524 is formed on one side surface of the main body 520, and a second dressing member 532 is embedded perpendicularly to the second inclined surface 524. The second dressing member 532 dresses the first side surface 754 of the external grinding stone 750. The arrow indicates the feed direction of the grindstone during dressing. A third inclined surface 526 is formed on the other side surface of the main body 520, and a third dressing member 534 is embedded perpendicularly to the third inclined surface 526. The third dressing member 534 dresses the second side surface 756 of the external grinding stone 750. The arrow indicates the feed direction of the grindstone during dressing.

FIG. 31 shows a dressing process for the internal grinding stone. As described above, as the internal polishing unit, a unit in which the direction of the drive shaft differs by 180 degrees is replaceable.
Outer peripheral surface 772 of the internal grinding wheel 770 of the standard internal grinding unit
Are dressed by the first dressing member 530. The side surface 774 of the internal grinding stone 770 is dressed by the second dressing member 532. In the replacement unit in which the mounting direction of the internal grindstone with respect to the spindle is changed by 180 degrees, the outer peripheral surface 772 of the internal grindstone 770A is
A is dressed with the first dressing member 530, and the side surface 774A is dressed with the third dressing member 534. In the case of an internal grinding wheel, the contact surface with the work may be on the opposite side of the dressing surface. In this case, for example, the body 520 of the dressing device may be provided with a hole, and the dressing member may be arranged in the hole. As described above, this device is the second
Since the headstock 50 of No. 1 was equipped with a dressing device 52,
It is not necessary to manually operate the dressing device 52, and automation of the dressing process can be achieved. Further, the dressing device 52 includes three dressing members 530, 532, 53 protruding in three directions.
Since it has No. 4, the outer peripheral surface and the both side surfaces of the outer grinding wheel and the inner grinding wheel can be efficiently dressed.

The present invention is a multi-tasking machine having the above-mentioned functions, in which the dimension data of the grindstone associated with the dressing is automatically updated and the automatic machining is continued without changing the contents of the NC program. It is a thing. 32 is NC
FIG. 33 is an explanatory view showing tool data of a grindstone necessary for creating a machining program, and FIG. 33 is a side view showing details of the grindstone. The coordinate position of the cutting point PA of the grindstone 750 is input as the values of the axis Z and the axis X with respect to the workpiece reference origin Wo set on the center line of the main axis. At this time, the value of X is set as a value corresponding to the diameter of the work. By automatically dressing the peripheral edge 750A of the grindstone 750, the cutting point of the grindstone shifts from PA to PB. At this time, since the NC device manages the size of the dressing path DR, data can be automatically obtained. Therefore, the cutting point PB of the grindstone data
By updating the coordinate position of, machining can be continued without changing the NC program.

FIG. 34 shows a control block for managing grindstone data. The main control unit 900 controls the keyboard 912 and the feed axis control units 950, 964, and 96 via the bus 910.
6 and the like, a mother troll program section 982, an EIA / ISO program section 984, a macro program section 980, a tool (grinding stone) data memory 98.
6 is provided. In the macro program unit 980, the dimension data of the grindstone is read from the tool data memory 986, and when the grindstone is dressed, the dimension data of the dressed grindstone is calculated from the position of the dressing member and updated to the tool data memory 986. Write the whetstone data. FIG. 35 is a diagram showing the dimension data P1, P2, P3 at three locations of the external grinding stone 750. First
Point P1 is the coordinates (GD1, GD2) on the axes X and Z of one end of the outer peripheral surface of the external grinding stone 750, and the second point P
2 is the coordinates (GD1, GD3) of the other end of the outer peripheral surface. The third point P3 is the coordinates (GD4, GD2) of the end portion on the inner circumference side on the same Z axis as P1.

FIG. 36 shows dimensional data P1, P2, P3 at three locations of the internal grinding stone 770. In the case of the internal grinding wheel 770 as well, similarly to the external grinding wheel 750, the data of the coordinate position necessary for defining the grinding wheel surface used for grinding the workpiece is designated. FIG. 37 shows three dressing members 530, 532, 53 attached to the main body 520 of the dressing device 52.
The coordinates of the blade edge positions P11, P12, and P13 of No. 4 on the axes X and Z are shown. The first dressing member 530 is a grindstone 75.
Dressing of the outer peripheral surface of 0 or 770 is executed. Therefore, the cutting edge position P11 of the first dressing member 530
By knowing (D1X, D1Z) and detecting the position on the axis X of the grinding unit by NC, the coordinates on the axis X of the outer peripheral surface after dressing can be obtained.

The second dressing member 532 is the grindstone 7
Dressing is performed from the position P1 to the position P3 which is the side surface of 50 and 770. Therefore, by knowing the coordinates (D2X, D2Z) of the blade edge position P12 of the second dressing member 532, and detecting the position on the axis Z of the table and the position on the axis X of the grinding unit by NC, the positions P1 and P3 are obtained.
You can get the coordinates of. By the same method, the coordinates of the blade edge position P13 of the third dressing member 534 (D3
By knowing (X, D3Z) and performing dressing, the coordinates (GD1, GD3) of the position P2 of the grindstone can be determined. FIG. 38 shows an argument C (position P) that defines the shape and size of the grindstone corresponding to a certain tool (grinding wheel) number.
It is a table showing (1, P2, P3 coordinates). This device automatically executes dressing of the grindstone, and automatically measures the size of the grindstone after dressing by the NC to update the data in the memory. At this time, the outer diameter of the grindstone is stored as a diameter dimension. Machining is executed by automatically modifying the machining program with new grindstone data. The above processing achieves automation of the grinding process.

In the multi-tasking machine having the above structure, the present apparatus detects the size of the work and the working position by the touch sensor tool mounted on the turning mill unit, and controls the grinding unit based on this information. It shortens the air cut time. FIG. 39 is a block diagram of this device. A touch sensor tool 652 is attached to the turret type tool rest 65 of the turning mill unit 60. The touch sensor tool 652 emits a signal when the probe 653 at its tip contacts the work. This signal is sent to the measurement processing unit 918 via the touch sensor control unit 919.
FIG. 57 shows details of the touch sensor tool. The touch sensor tool 652 is prepared on the turret tool post 65 as a kind of exchange tool. In the touch sensor tool 652 shown on the left side of FIG. 57, the axis line of the probe 653 is arranged orthogonal to the axis line of the first main shaft 35. The touch sensor tool 652 is used for the chuck work of the first main spindle 35 or the second main spindle 55, or the first main spindle 35.
And the second main shaft 55 jointly measure the outer diameter and the end surface of the shaft work that grips the work. The touch sensor tool 652A shown on the right side of FIG. 57 is one in which the axis of the probe 653A is arranged parallel to the first main axis. This touch sensor tool 652A is used for the first spindle 3
The outer diameter and the inner diameter of the chuck work of No. 5 are measured. A touch sensor tool in which the orientation of the probe 653A is changed by 180 degrees can be prepared to measure the outer diameter and the inner diameter of the chuck work of the second spindle 55. The work 80 is gripped by the first spindle 35 of the first headstock 30 fixed on the table and subjected to grinding. The work 80 may be transferred to the second spindle 55 of the second headstock 50 and ground. Program memory 922
Has an EIA / ISO memory 922A, a mother trawl memory 922B, and a macro memory 922C. Other elements constituting the device are similar to those shown in FIG.

FIG. 40 shows an outline of a work size / position detection program. Mazatrol program for measurement 20
00 calls the position detection macro program 2050 in step 2010. The position detection macro program starts the measurement in step 2100 and indexes the touch sensor tool of the tool post in step 2110. Step 212
When the touch sensor tool is sent to the work at 0 and touches the work, the feed is stopped at step 2130. The coordinates of the contact position are read in step 2140, and the measurement is ended in step 2150. The result is processed in step 2160 and the position data is written in step 2170. The measurement mother troll program 2000 is step 202
Input data with 0. This result is sent to the machining mother trawl program 2300. The machining mother trawl program 2300 calls the machining macro program 2400 in step 2310. The position data obtained by the position detection macro program 2050 is sent to the offset 2351 of the setup data 2350 in the axis Z direction, and is also sent as the data of the air lab start point in step 2320 of the machining mother trawl program 2300.

41 and the following figures explain the principle of measuring the offset amount of the work with respect to the work reference origin WO. FIG. 42 shows a state in which the outer diameter dimension D1 of the work 80 gripped by the first spindle 35 is measured by the touch sensor tool 652 and the grinding start point is detected. FIG. 43 shows a state in which the touch sensor tool 652 is brought into contact with the end surface 801 and the flange end surface 802 of the work 80 to measure the offset amount on the axis Z from the work reference origin WO. In FIG. 44, the flange end surface 805 that has been ground in the first step is measured and the opposite surface 8
The state in which the processing dimension of 06 is managed is shown. FIG. 45 shows that when measuring the outer diameter of the work 80, if the work 80 is tapered by heat treatment, the data changes depending on the position on the axis Z. FIG. 46 shows a case where the axis of the chuck work 80 is bent by heat treatment. Figure 4
7 shows a case where the axis of the shaft work 80 is bent by heat treatment. In any case, since the data changes depending on the measurement position, it is necessary to move the touch sensor tool in the axis Z direction or rotate the work to detect the position.

FIG. 48 shows a processing flow. Step 3
The automatic operation is started at 000, and the touch sensor tool of the turret tool post is selected at step 3010. In step 3020, move to the detection position on the axis Z,
The spindle holding the workpiece is indexed to the 0 degree position at 30. In step 3040, move the tool post closer to the workpiece along axis X,
Detect the position. In step 3050, the tool rest is separated from the work, and in step 3060, the spindle is indexed to the 90 degree position. In step 3070, bring the tool rest closer to the work again,
Detect the position. After that, if necessary, the main axis is 180 degrees,
The workpiece outer diameter is detected by indexing to the 270 degree position. Also,
It is also possible to repeat the above steps by changing the position on the axis Z. In step 3080, return the tool post of the turning mill unit to the origin, and in step 3090, move the grinding unit to the axis X.
Then, in step 3100, the grinding unit by the external polishing unit is started.

Next, the case of detecting the position of the end surface of the work in the Z-axis direction will be described. FIG. 49 shows the case of the chuck work 80. The end face 801 and the flange end face 80 of the work 80 are shown.
The touch sensor tool 652 is brought into contact with 2 to detect the position. In FIG. 50, the work 80 is placed on both centers 351 and 551.
The case of supporting with. Flange end face 80 of work 80
The position is detected before grinding 3 is performed. FIG. 51 shows the end face 8
The case where the position of 03 in the direction of the axis Z coincides with the regular position a is shown. FIG. 52 shows a case where the center hole 807 of the work engaged with the center 351 is excessively large, and if the position of the end face 803 is not detected, the external grinding wheel 750 will move from a to b on the axis Z.
It will cut the air between. FIG. 53 shows a case where the center hole is too small. If the position of the end surface 803 is not detected, the external grinding wheel 750 remains at the rapid feed speed toward the point a on the axis Z and collides with the end surface 803 at the point c. I will end up.

FIG. 54 shows a flow for detecting the end face position on the axis Z. In step 4000, automatic operation starts,
In step 4010, the tool post touch sensor tool is selected. In step 4020, the touch sensor tool moves to the detection position, and in step 4030, the spindle holding the work is indexed to the 0 degree position. In step 4040, the touch sensor tool moves along the axis Z to detect the end surface position of the work. In step 4050, return the turret to the origin,
In step 4060, the grinding process by the grinding unit is started. Next, in FIG. 55, one end face of the flange finished by grinding in the previous step is ground to the other end face,
In addition, a method for managing the width dimension of the flange will be described. Work 8
The first end surface 805 of 0 is ground and finished in the first step, and the work is inverted and center-supported (A). The position of the first end surface 805 of the work 80 is detected by the touch sensor tool 652 (B), and the distance data H1 is obtained from the reference surface on the axis Z (C). Next, the touch sensor tool 652 is moved to the second end surface 806 side (D), and the distance data H2 from the reference surface of the end surface 806 is obtained (E). External grinding wheel 750
(F), and the length dimension H from the first end surface 805 to the second end surface 806 is managed (G).

FIG. 56 shows a processing flow. Step 5
The automatic operation starts at 000, and the touch sensor tool of the tool post is selected at step 5010. Step 50
First end surface 8 where the touch sensor tool is a reference surface at 20
The position is moved to the detection position 05, and the end face position is detected in step 5030. In step 5040, the touch sensor tool retracts from the end surface, and in step 5050, the touch sensor tool
To the detection position of the end surface 806. Step 5060
The position of the machined surface is detected by, and the tool rest returns to the original position in step 5070. Next, in step 5080, the grinding process is started by the grinding unit, and the process is executed while controlling the dimension of the processed end surface.

[0037]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, there is provided a combined machining machine equipped with a turning mill unit having a tool changeable tool rest and a grinding unit, in which the tool rest is provided with a size and position detecting means. The positions of the workpiece gripped by the axes X and Z are detected. The machining program origin is shifted based on this data, and the grinding machining start point is determined. Therefore, the grindstone can start the grinding process with the minimum air cut.

[Brief description of drawings]

FIG. 1 is a plan view of a combined machining machine according to the present invention.

FIG. 2 is a front view.

FIG. 3 is a plan view showing a control shaft.

FIG. 4 is a front view.

5 is a view on arrow H of FIG.

FIG. 6 is a view on arrow K in FIG.

FIG. 7 is a plan view of a grinding unit.

FIG. 8 is a view on arrow M of FIG.

FIG. 9 is an explanatory view showing a turning mechanism of the grinding unit.

FIG. 10 is a block diagram of a control device.

FIG. 11 is an explanatory view showing details of a grinding unit.

FIG. 12 is an explanatory view showing a first exchange unit of the internal laboratory unit.

FIG. 13 is an explanatory view showing a second exchange unit of the internal laboratory unit.

FIG. 14 is a sectional view of a work.

FIG. 15 is an explanatory diagram showing a first step of grinding.

FIG. 16 is an explanatory diagram showing a second step of grinding.

FIG. 17 is an explanatory view showing a first turning position of the grinding unit.

FIG. 18 is an explanatory view showing a second turning position of the grinding unit.

FIG. 19 is an explanatory view showing a third turning position of the grinding unit.

FIG. 20 is an explanatory view showing a fourth turning position of the grinding unit.

FIG. 21 is an explanatory view showing a fifth turning position of the grinding unit.

FIG. 22 is an explanatory view showing a sixth turning position of the grinding unit.

FIG. 23 is an explanatory view showing a seventh turning position of the grinding unit.

FIG. 24 is an explanatory diagram showing movement control of the internal polishing unit along the axis Y.

FIG. 25 is an explanatory view showing machining by moving the internal polishing unit along the axis Y.

FIG. 26 is an explanatory diagram showing movement control of the internal polishing unit along the axis Y.

FIG. 27 is an explanatory view showing machining by moving the internal polishing unit along the axis Y.

FIG. 28 is a plan view of the dressing device.

FIG. 29 is a side view of the dressing device.

FIG. 30 is an explanatory view showing dressing of an external grinding stone.

FIG. 31 is an explanatory diagram showing dressing of an internal grinding wheel.

FIG. 32 is an explanatory view showing tool data of a grindstone.

FIG. 33 is a side view of the grindstone.

FIG. 34 is a block diagram of control.

FIG. 35 is an explanatory diagram of an external grinding stone.

FIG. 36 is an explanatory diagram of an internal grinding stone.

FIG. 37 is an explanatory diagram of a dressing device.

FIG. 38 is a table of tool data.

FIG. 39 is a block diagram of a control device.

FIG. 40 is an explanatory diagram showing an outline of a program.

FIG. 41 is an explanatory diagram showing coordinates.

42 is an explanatory diagram showing position detection in the axis X direction. FIG.

FIG. 43 is an explanatory diagram showing position detection in the axis Z direction.

FIG. 44 is an explanatory diagram showing detection of a processed reference surface of a work.

FIG. 45 is an explanatory view showing detection of the outer diameter dimension of the work.

FIG. 46 is an explanatory view showing detection of the outer diameter dimension of the work.

FIG. 47 is an explanatory view showing the detection of the outer diameter dimension of the work.

FIG. 48 is a flowchart of processing.

FIG. 49 is an explanatory diagram showing detection of a workpiece in the Z-axis direction.

FIG. 50 is an explanatory diagram showing detection of a workpiece in the Z direction.

FIG. 51 is an explanatory view showing a processing start point.

FIG. 52 is an explanatory view showing a change in the work position due to the center hole.

FIG. 53 is an explanatory diagram showing a change in work position due to a center hole.

FIG. 54 is a flowchart of processing.

FIG. 55 is an explanatory view showing a procedure for detecting and processing the reference surface of the work.

FIG. 56 is a flowchart of processing.

FIG. 57 is a detailed view of the touch sensor tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combined processing machine 10 Bed 12 1st guide surface 14 3rd guide surface 16 4th guide surface 20 Table 30 1st headstock 35 1st spindle 50 2nd headstock 52 Dressing device 55 2nd Spindle 60 Turning mill unit 65 Turret type tool post 70 Grinding unit 71 Fifth guide surface 74 External grinding unit 76 Internal grinding unit 80 Work piece 90 Control device 520 Dressing device body 530 First dressing member 532 Second dressing member 534 No. 3 Dressing member 652 Touch sensor tool 700 Grinding unit base 720 Swiveling base 750 External grinding wheel 770 Internal grinding wheel

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[Procedure amendment]

[Submission date] April 10, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (3)

[Claims] 1. A bed, a table slidably supported by and controlled by a first linear guide surface disposed on the bed, a first headstock mounted on the table, and a first headstock.
Slidably on a first spindle that is mounted on the headstock and is controlled around a first rotation axis, and a second linear guide surface that is arranged on the table in parallel with the first linear guide surface. A second headstock supported and controlled; a second headstock mounted on the second headstock and controlled about a second rotation axis concentric with the first rotation axis; and a second headstock on the bed. Turning guide mill unit having a turret type tool rest slidably supported and controlled by a third linear guide surface arranged orthogonal to the first linear guide surface, and a third linear guide on the bed. A grinding unit that is slidably supported and controlled by a fourth linear guide surface that is arranged parallel to the surface, and a control device are provided. A composite tool that detects the size and position of the workpiece by the detection means coming into contact with the workpiece to be gripped. Machine. 2. The combined machining machine according to claim 1, further comprising means for calculating a grinding start point by the grinding unit based on the detected size and position data of the workpiece. 3. The compound processing machine according to claim 2, wherein the headstock is provided with a dressing device for the grindstone of the grinding unit, and means for managing the size of the grindstone.