JPH0871873A - Complex processing machine - Google Patents

Abstract

PURPOSE: To carry out the complex processing with one chuck so as to improve the processing accuracy and productivity. CONSTITUTION: A complex working machine is provided with a headstock 2 and tailstocks 3, 4 for fixing and rotating a workpiece, at least two processing heads 8, 9, 10 for performing different kinds of processing, and the processing head selecting means 7 for positioning the processing heads 8, 9, 10 selectively into a workpiece processing position so as to enable the different kinds of processing of workpieces with one chuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tasking machine capable of performing multi-tasking such as turning, grinding and milling of a shaft end and outer shape of a work such as a ball screw shaft with one chuck.

[0002]

2. Description of the Related Art Generally, as shown in FIGS. 4A and 4B, the shaft end of a ball screw shaft or the like has a step 201 and a screw 202 which are turned, ground, and keyed. Two
Various processes such as 03 milling are required. In order to perform such a different type of processing, conventionally, a lathe, a grinder, and a milling machine have been sequentially used.

In each processing step, the work 204 is attached to the headstock 20 of each processing machine as shown in FIGS. 4 (c) and 4 (d).
5 and the tailstock 206 are fixed between the work 20
The centering of No. 4 is performed by inserting the center 208 of the tailstock 206 into the center hole 207 provided at the shaft end of the work 204.

[0004]

However, in the case of the above-mentioned conventional technique, the center hole 205 of the work 204 is provided.
Although the work 204 is centered by the center 20 that engages with the center hole 207 when chucking to each processing machine.
Since the hit of 8 is slightly different, the rotation center of the work 204 is different in each processing machine, and there is a problem that it is difficult to obtain accuracy.

Further, since turning, grinding, and milling of the work 204 are performed by different processing machines, there is a problem that an idle time for attaching and detaching the work is required between the respective steps, and productivity is poor. .

The present invention has been made in order to solve the above-mentioned problems of the conventional example, and an object thereof is to provide a multi-tasking machine capable of multi-tasking with one chuck,
Therefore, it is intended to improve processing accuracy and productivity.

[0007]

In order to achieve the above object, according to the present invention, a headstock and a tailstock for fixing and rotating a work and at least two for performing different kinds of machining. A machining head and a machining head selection means for selectively positioning the machining head at the machining position of the work, and are capable of performing different kinds of machining with the work fixed to the headstock and the tailstock. To do.

[0008] The different types of machining are, for example, at least two machining processes of turning, milling and grinding.

The processing head selecting means is characterized in that the processing head is constituted by a rotary table arranged in the rotational direction.

The cutting and feeding operations of the tool in machining may be performed by fixing the machining head and moving the work side, or by fixing the work and moving the machining head side.

As a concrete structure for moving the machining head side, a base, a headstock and a tailstock arranged coaxially with each other on the base, and the headstock and the tailstock on the base. A first saddle provided adjacent to the base so as to be movable in a direction parallel to the central axes of the headstock and the tailstock via a first linear guide mechanism, and a first drive mechanism for driving the first saddle. A second saddle movably supported on the first saddle via a second linear guide mechanism in a direction orthogonal to the moving direction of the first saddle, and a second drive mechanism for driving the second saddle. And a rotary table provided on the second saddle, and a plurality of different types of processing heads provided on the rotary table.

[0012]

According to the present invention, the work is fixed by the headstock and the tailstock, and the predetermined machining head is selected by the machining head selecting means and positioned at the machining position to perform the predetermined machining. Next, with the work fixed, another type of processing head is selected by the processing head selection means and positioned at the processing position to perform another type of processing. Therefore, different types of processing such as turning, grinding, and milling can be performed with one chuck.

Here, in the case of turning and grinding, the work is rotated by the headstock, but in the case of milling, the work is positioned at a predetermined angle.

When the position of the work is fixed and the machining head side is moved, it is sufficient to secure a space for moving the machining head, so that the space efficiency is good and the apparatus structure can be made compact.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

FIG. 1 shows a multi-tasking machine according to an embodiment of the present invention.

This multi-tasking machine performs three types of processing, namely turning, milling and grinding, and roughly comprises a base 1 and a headstock 2 coaxially arranged on the base 1.
And two tailstocks 3 and 4, and adjacent to the headstock 2 and the tailstocks 3 and 4, movably provided in a direction parallel to the central axes of the headstock 2 and the tailstocks 3 and 4. 1 saddle 5
A second saddle 6 movably supported on the first saddle 5 in a direction orthogonal to the moving direction of the first saddle 5, a rotary table 7 provided on the second saddle 6, and a rotary table 7. There are provided three types of machining heads for turning, milling and grinding, namely a turning head 8, a milling head 9 and a grinding head 10.

The base 1 is a high-rigidity base, and a first base 11 and a second base 12 lower than the first base 11 are provided on the upper surface of the base 1. The spindle headstock 2 and the tailstocks 3, 4 are arranged on the first table portion 11, and the processing heads 8, 9, 10 are arranged on the second table portion 12.

The spindle of the headstock 2 is rotationally driven by a spindle drive motor 13 such as an AC servomotor, and is capable of continuous rotation and intermittent rotation at an arbitrary angle.

The tailstocks 3 and 4 are provided on the left and right sides of the headstock 2, and chucks 14 and 15 are provided on the left and right sides of the headstock 2 so as to face the left and right tailstocks 3 and 4, respectively. There is. The left and right chucks 14 and 15 can be selected for use depending on the length of the work. Here, the left tailstock 4 is optional, and normally only the right tailstock 3 and the headstock 2 are used to machine only one shaft end. By providing the tailstocks 3 and 4 on the left and right, the left and right shaft ends can be machined with one chuck.

The left and right tailstocks 3 and 4 are manually operated to chuck the work and then tailor the work. Of course, the tailstock 3,
4 may be automatic. In the case of processing a long work piece, a touch stop device 16 is used on the left side of the machine body in the figure. Of course, in this case, the left tailstock 4 is removed. The steady rest 16 can have various known configurations, such as a configuration in which a work is supported by a plurality of rollers.

The headstock 2 and the left and right tailstocks 3 and 4 are movable through a third linear guide mechanism 17 and can be fixed at arbitrary positions.

The third linear guide mechanism 17 includes the first linear guide mechanism 17 of the base 1.
It is composed of a pair of track rails 17a laid parallel to each other at a predetermined interval on the base 11 and a moving block 17b movably provided on the track rails 17a via rolling elements such as balls (not shown). A block 17b is fixed to the headstock 2 and the left and right tailstocks 3 and 4.

The first saddle 5 is movably supported by a first linear guide mechanism 18 in the Z-axis direction parallel to the central axis of the work, and is driven by a first drive mechanism 19.

The first linear guide mechanism 18 includes a pair of track rails 18a laid parallel to each other on the second base portion 12 of the base 1 at predetermined intervals, and rolling elements such as balls (not shown) on the track rails 18a. And a movable block 18b that is movably provided via the movable block 18b. The movable block 18b is fixed to the back surface of the first saddle 5.

The first drive mechanism 19 is fixed to the back surface of the first saddle 5 and a ball screw shaft 19a that is axially immovable with respect to the base 1 and rotatably supported in the rotational direction. A ball nut (not shown) that is screwed onto the ball screw shaft 19a via a ball, and a first drive motor 19b such as an AC servomotor that rotationally drives the ball screw shaft 19a.

The second saddle 6 is movably supported on the first saddle 5 via the second linear guide mechanism 20 in the X-axis direction orthogonal to the moving direction of the first saddle 5. , Driven by the second drive mechanism 21.

The second linear guide mechanism 20 is moved through a pair of track rails 20a laid parallel to each other on the first saddle 5 at predetermined intervals, and rolling elements such as balls (not shown) on the track rails 20a. Moving block 20 provided freely
The moving block 20b is fixed to the second saddle 6.

The second drive mechanism 21 is a ball screw shaft (not shown) that is axially immovable with respect to the first saddle 5 and is rotatably supported in the rotational direction, and the back surface of the second saddle 6. A ball nut (not shown) that is fixed to the ball screw shaft and is screwed to the ball screw shaft via a ball
And a second drive motor 21b such as a C servo motor.

The rotary table 7 provided on the second saddle 6 is
The rotation center axis is a Y-axis that is orthogonal to the X-axis and the Z-axis, and is composed of an index table that can be divided by 90 °. Three machining heads, namely a turning head 8, a grinding head 9 and a milling head 10, are mounted on the turntable 7.

In these machining heads, a milling head 10 is mounted on the left side of the turning head 8 at 90 °, and a grinding head 9 is mounted on the right side of 90 °, and the rotary table 7 is driven to rotate by a hydraulic mechanism, an electric motor, etc. It is possible to select the head of.

In the turning head 8, six rotary tools 82 and 83 are attached to a rotary type bite holder 81, and right and left hand tools are respectively provided, and any tool can be selected by a command.

The milling head 9 is a milling tool 91.
And a spindle 92 for holding a milling tool 91,
A milling motor 93 as a drive source and a power transmission mechanism 94 such as a belt for transmitting the driving force of the milling motor 93 to the spindle 92.

The grinding head 10 includes a grinding wheel 101, a spindle 102 for holding the grinding wheel 101, a grinding motor 103 as a driving source, a belt for transmitting the driving force of the grinding motor 103 to the spindle 102, and the like. Power transmission mechanism 104 of FIG.

Further, a coolant tank 22, an operation panel 23 and a control panel 24 are arranged around the base 1. There is only one coolant tank 22, which uses coolant for both turning and grinding. Of course, two tanks may be arranged and dedicated coolants for turning and grinding may be used. The operation panel 23 is used to input the processing procedure, start the processing,
The control panel 24 controls various operations such as stop, and controls the spindle drive motor 13, the first and second drive motors 19b and 21b, the head selection operation by the rotary table 7, and the drive of each processing head.

Here, the machining procedure will be described taking the case of machining the shaft end of the work shown in FIG. 4A as an example. First, the work is fixed between the headstock 2 and the tailstock 3.

Then, the turning head 8 is selected, the rotary table 7 rotates, and the turning head 8 is located at a processing position where it faces the workpiece, and turning is performed in a predetermined size and shape.

Next, the grinding head 10 is selected, the rotary table 7 rotates, the grinding head 10 is positioned at the processing position, and a predetermined grinding operation is performed.

Finally, the milling head 9 is selected, the rotary table 7 rotates, and the milling head 9 is positioned at the processing position. On the other hand, the spindle drive motor 13 determines the machining position of the key groove, and the key groove is machined.

The order of grinding and key groove processing may be reversed.

In the above embodiment, the position of the work is fixed and the machining head is moved to perform the cutting and feeding operations. However, the position of the machining head is fixed and the work is moved. The tool may be configured to perform a cutting operation and a feeding operation.

[0042]

As described above, according to the present invention,
It is possible to perform different types of processing such as turning, grinding, and milling with one chuck, and it is possible to improve processing accuracy and productivity.

Further, if the structure is such that the position of the work is fixed and the machining head side is moved,
Can be processed with a compact structure.

[Brief description of drawings]

FIG. 1 is a plan view of a combined processing machine according to an embodiment of the present invention.

FIG. 2 is a front view of the multi-tasking machine of FIG.

FIG. 3 is a side view of the multi-tasking machine of FIG.

4 (a) and 4 (b) are views showing an example of a work to be combined, FIG. 4 (c) is a view showing a state where the work is chucked, and FIG. 4 (d) is a center hole and a center. FIG.

[Explanation of symbols]

 1 base 2 spindle head 3, 4 tailstock 5 1st saddle 6 2nd saddle 7 rotary table 8 turning head 9 milling head 10 grinding head 13 drive motor (for spindle) 14, 15 chuck 18, 20 1st, 1st 2 Linear guide mechanism 19,21 First and second drive mechanism

Claims (4)

[Claims] 1. A headstock and a tailstock for fixing and rotating a workpiece, at least two machining heads for performing different types of machining, and machining for selectively positioning the machining head at a machining position of the workpiece. A multi-tasking machine, comprising: a head selecting means, which enables different types of machining in a state where the work is fixed to the headstock and the tailstock. 2. The different type of processing is at least two of turning, milling and grinding.
Combined processing machine described in. 3. The multi-tasking machine according to claim 1, wherein the machining head selecting means is constituted by a turntable having the machining heads arranged in a rotating direction. 4. A base, a headstock and a tailstock arranged coaxially with each other on the base, and a first base adjacent to the headstock and the tailstock on the base. A first saddle provided movably in a direction parallel to the central axes of the headstock and tailstock via a linear guide mechanism, a first drive mechanism for driving the first saddle, and a first saddle on the first saddle. A second saddle movably supported in a direction orthogonal to the moving direction of the first saddle via a second linear guide mechanism, a second drive mechanism for driving the second saddle, and the second saddle A multi-tasking machine comprising: a turntable provided on the upper side; and a plurality of different types of machining heads provided on the turntable.