JPH05177507A - Index machine and use thereof - Google Patents

Abstract

PURPOSE:To enhance the machining accuracy of a work by measuring and storing the dislocation between the machining position in a plurality of tools supported by a machining unit and the machining unit, and by drivingly controlling the tool of the machining unit so as to eliminate this dislocation. CONSTITUTION:A turntable 23 is arranged under the machining tool 2 that has been supported by a machining unit 1. On the turntable 2, a work clamping jig 25 by which a work 24 is supported so as to be turnable around the axis of the turntable is arranged. In this case, the machining unit stores the displacement measured by a measuring unit by means of a storing means 40. And it is discriminated by a discriminating means 41 that any out of a plurality of machining tools 2 in the turret head 4 of the machining unit 1 is situated in the machining position. Further, data are taken out by a control means 42 from the storing means 40 on the basis of the signal from the discriminating means 41, and respective motors 17 for driving the Y-axis and the X-axis are controlled respectively so as to correct the dislocation of the machining tool 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an index machine and a method of using the index machine.

[0002]

2. Description of the Related Art A conventional index machine, particularly a rotary index machine, rotatably supports a work at a divided position of a turntable by a jig, and stops the turntable at each process position in which the turntable is divided and arranged in a circumferential direction. At this time, the processing unit in the process position processes the work with the tool, so that a series of a plurality of processes can be performed on the same work while the turntable makes one turn. The processing unit has a plurality of tools such as a turret, and the turret can be rotated to alternately use the plurality of tools.

[0003]

However, in such a conventional index machine, a plurality of tools are supported by the turret, and the tool supports the axial center of each of the supported tools at the machining position. Since an error in accuracy inevitably occurs between the XY coordinate origin of the processing unit, the processing accuracy of the work is reduced by the error. For this reason, there is a problem that a work requiring high accuracy needs to be subjected to secondary machining, and a work that cannot be subjected to secondary machining cannot be mass-produced using an index machine. Therefore, an object of the present invention is to provide a highly accurate index machine that does not require secondary processing.

[0004]

In order to solve the above-mentioned problems, an index machine according to the present invention conveys a work to each step position which is divided and clamps the work at a division position corresponding to each step position. An index table provided with a jig so as to movably support the work, and a driving means for movably supporting the plurality of tools arranged at each of the process positions alternately and supporting the tools in the X-axis and Y-axis directions. A plurality of machining units that are provided, a storage unit that stores in advance a deviation between the axis center of each of the plurality of tools at each machining position and the XY coordinate origin of the machining unit that supports this tool; and any one of the plurality of tools Identifying means to
Based on the signal from the identification means, the tool is moved in the X-axis and Y-axis directions so as to eliminate the deviation between the axis center of each of the plurality of tools at each processing position and the XY coordinate origin of the processing unit that supports this tool. The control means for controlling the drive means is provided.

[0005]

According to the index machine having such a configuration, the deviation between the axis center of each of the plurality of tools supported by each machining unit at each machining position and the XY coordinate origin of that machining unit is measured and stored in advance. However, the machining accuracy of the workpiece is improved by moving the tool of the machining unit in the X-axis and Y-axis directions so as to eliminate the deviation during machining and repeating this operation every time a plurality of tools stop at each machining position. As a result, it is possible to mass-produce highly accurate workpieces using the index machine.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing a rotary index machine according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a machining unit, and this machining unit 1 supports a plurality of machining tools 2 such as a drill and a cutting tool. As shown in FIG. 2, the working tool 2 is supported by a turret head 4 of, for example, a hexagon at or in a position, and the turret head 4 is supported by the turret body 3. As shown in FIG. 3, the turret head 4
Is driven by the turret split motor 9 to select a tool to be used and positioned at the machining position, and the tool used while being rotated by the selected tool is driven and rotated by the turret tool rotation motor 10 to perform a machining operation. A tool that does not require rotation, such as a cutting tool, performs a machining operation without using the turret tool rotation motor 10. The turret body 3 is, as shown in FIG.
It is driven in the Z-axis direction (vertical direction in the figure) to move up and down. The turret body 3 is driven in the Y-axis direction (left-right direction in FIG. 4) by the Y-axis drive motor 11 (actuator) via the gear mechanism 12, the ball screw mechanism 13 and the Y slider portion 14 as shown in FIG. Being reciprocated. Further, as shown in FIG. 1, the turret body 3 is driven by an X-axis drive motor 17 (actuator) in the X-axis direction (horizontal direction in the figure) via a gear mechanism 18, a ball screw mechanism 19 and an X slider section 20. To make a round trip.

In FIG. 1, a turntable 23 is arranged below the machining tool 2, and a work clamp jig 25 for supporting a work 24 rotatably around the axis is provided on the turntable 23. Has been. As shown in FIG. 5, the turntable 23 is provided with a work 24 supported at respective dividing positions A to L, which are circumferentially divided into, for example, 12 portions, and are rotated by an angle between the respective dividing positions. Then, the work 24 is stopped for a certain period of time for machining. Therefore, the division position A of the turntable 23
Processing units 1 for processing the workpiece 24 are arranged at the respective process positions I to XII corresponding to the respective positions L to L. For example, the process position I in FIG.
The work 24 is loaded and clamped on the work clamp jig 25 at the division position A in (2), rough machining of the pilot hole in II, finish machining of the pilot hole in III, end face finishing in IV, V For Roughing of the tip mouth, for VI, roughing of the inner seat surface, for VII simple high pressure chip cleaning, for VIII finishing of the inner seat surface, for IX finishing of the tip mouth, for X Is a recess process for expanding the hole diameter in the middle of the length direction, cleaning of the machined part is performed in XI, and unclamping and unloading of the work 24 is performed in XII.

Further, in FIG. 1, a work clamp jig 2 is provided.
A rotation drive unit 28 for driving the rotation of the work 24 via the work clamp jig 25 is disposed below the device 5. The rotary drive unit 28 is provided with a connection joint portion 29 that transmits rotation to the work clamp jig 25, and rotation from a jig rotation motor 31 is transmitted to the connection joint portion 29 via a belt 30. Further, the connecting joint portion 29 is connected to a piston tip portion of the air silling 34, and when the connecting joint portion 29 is lifted by the operation of the air cylinder 34, the connecting joint portion 29 is rotatably connected to the work clamp jig 25.

Further, as shown in FIG. 5, the processing unit 1 is provided with storage means 40, identification means 41, and control means 42. That is, the storage means 40 stores the result of measuring the deviation amount by the measuring device (not shown), and the identification means 41 determines which of the plurality of machining tools 2 in the turret head 4 of the machining unit 1 is located at the machining position. The control means 42 extracts the data from the storage means 40 based on the signal from the identification means 41, and controls the Y-axis drive motor 11 and the X-axis drive motor 17 so as to correct the deviation of the machining tool 2. By controlling, the XY coordinate origin of the machining unit 1 and the axis center at the machining position of the machining tool 2 are matched with high accuracy. The identification unit 41 is composed of a timer, a sensor, or the like.

Next, the operation will be described. There is a deviation in accuracy between the axis center of each of the plurality of machining tools 2 supported by the machining unit 1 at each machining position (position immediately before machining operation) and the origin of the XY coordinates of the machining unit 1, and each machining tool 2
The deviation between them is measured by a measuring device in advance. For example, the deviations at the respective positions or the respective processing positions of the processing tool 2 are detected by the respective XY components (unit: μm) as shown in the table of FIG. Based on such a measurement result, as shown in FIG. 7, first, the identification means 41 identifies which of the plurality of processing tools 2 supported by the turret head 4 of the processing unit 1 is at the processing position (step S1), for example a machining tool 2 supported at the position of the turret head 4
6 is stored, the control means 42 sets the coordinate system of the shift from the stored XY data in the table of FIG. 6 (step S2), and the turret body 3 is moved to XY by the X-axis drive motor 17. The turret body 3 is moved in the Y direction by the Y-axis drive motor 11 by displacing it from the zero center in the X-axis direction by -3 μm.
By controlling the displacement by -5 μm in the axial direction (step S3), the machining tool 2 is processed after the displacement is eliminated.
To process the work 24 (step S4),
The processing accuracy of the work 24 can be improved. When the processing is completed (step S5), the turret body 3 is returned to the XY coordinate origin of the processing unit 1 (step S6),
The next machining tool 2 comes to the machining position by rotating the turret head 4 (step S7).

Next, it is judged whether or not there is an abnormality such as damage to the machining tool 2 (step S8). If there is no abnormality, then it is judged whether or not a machining stop signal is issued (step S9), and no signal is issued. For example, the process returns to step S1 and the same operation is repeated. When there is a signal of the above-mentioned abnormality or processing stop, the operation of the entire apparatus is stopped (step 10). In addition, although the above embodiment has described the rotary index machine in which the process positions are arranged in the circumferential direction in a divided manner, the present invention is similarly applicable to a linear index machine in which the process positions are arranged in a divided manner in the linear direction. Needless to say.

[0012]

As described above, according to the present invention, the deviation between the axis center at each machining position of a plurality of tools supported by each machining unit and the XY coordinate origin of the machining unit is measured in advance. The machining accuracy of the work is stored by storing the data in the machining unit, moving the tool of the machining unit in the X-axis and Y-axis directions so as to eliminate the deviation during machining, and repeating this operation every time a plurality of tools stop at each machining position. Therefore, it becomes possible to mass-produce workpieces with high precision by using the index machine.

[Brief description of drawings]

FIG. 1 is a side view of a processing unit of an index machine according to the present invention.

FIG. 2 is a front view of the turret head shown in FIG.

FIG. 3 is a top view of the index machine shown in FIG.

FIG. 4 is a rear view of the index machine shown in FIG.

FIG. 5 is a conceptual diagram showing a positional relationship between a processing unit and a turntable.

FIG. 6 is a table exemplifying, as XY components, data of the deviation between the measured axis center of the machining tool and the XY coordinate origin of the machining unit.

FIG. 7 is a flowchart showing an operation procedure of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing unit 2 Processing tool 3 Turret main body 4 Turret head 10 Turret tool rotation motor 11 Y-axis drive motor 17 X-axis drive motor 23 Turntable 24 Work piece 40 Storage means 41 Identification means 42 Control means

Claims (2)

[Claims] 1. An index table for movably supporting a work, comprising a jig for transporting the work to each of the divided process positions and clamping the work at a divided position corresponding to each of the process positions; A plurality of machining units which are arranged at process positions and which alternately support a plurality of tools so that they can be used alternately, and which have drive means for moving the tools in the X-axis and Y-axis directions, and an axis center at each machining position of the plurality of tools A storage unit that stores in advance a deviation from an XY coordinate origin of a machining unit that supports this tool, an identification unit that identifies any of the plurality of tools, and a plurality of the tools based on a signal from the identification unit. The drive means is arranged to move the tool in the X-axis and Y-axis directions so as to eliminate the deviation between the axis center at each processing position and the XY coordinate origin of the processing unit supporting this tool. An index machine comprising control means for controlling. 2. A deviation between an axis center at each machining position of the plurality of tools and an XY coordinate origin of a machining unit that supports the tool is measured and stored in advance to eliminate the deviation before machining. A method of using an index machine, characterized in that a tool of a machining unit is moved in the X-axis and Y-axis directions, and this operation is repeated every time the plurality of tools stop at respective machining positions.