JPS5947137A - Spindle controller of machine tool - Google Patents

Abstract

PURPOSE:To index a main spindle without causing any necessity for additionally providing a control shaft, which controls a rotary angle of the spindle, by providing an indexing plate having grooves divided at an equal distance on the peripheral position of the spindle and indexing the spindle by inserting a rotary knob provided on a tool rest into the divided groove, in the case of a spindle index controller of a machine tool. CONSTITUTION:A workpiece held by a main spindle is subjected to turning work by a rotary tool 15 and turning tool 14 on the first feed slide bed A. Next, if a Z-axis slide 9 of the second feed slide bed B advances along a rotary shaft line of the spindle to a position, where a rotary knob 18 of a control member 17 is enaged with the divided groove on an indexing plate on the spindle, the Z-axis slide 9 stops. Thereafter, an X-axis slide 10 of the second feed slide bed B advances the workpiece by the distance corresponding to the amount of travel required for machining a prescribed long hole toward the rotary shaft line of the spindle. Thus the spindle is able to give the workpiece a necessary rotary feed and further index the workpiece.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spindle control device for a machine tool that performs long hole machining on the front and outer periphery of a workpiece.

Conventionally, the tool table was sent to the machining area based on numerical control commands.
When machining a long hole on an arc or a long hole on the outer periphery of the workpiece on the front side of the workpiece using a rotary tool installed on a tool stand,
In addition to the feed control shaft of the tool stand, a control device for indexing the workpiece to an arbitrary rotation angle position is installed on the main shaft. The control Φ111 of the main 11Qlt is called the C-axis y in contrast to the X-axis and Z-axis, which are the feed control axes of the tool stand, and is engaged with the main shaft via a servo motor and transmission means such as a clutch and gear, and is numerically controlled. The spindle rotation angle can be controlled continuously based on commands.

For this purpose, the numerical control device is equipped with a C-axis control axis in addition to the feed control axis of the table.

Generally, as the number of control axes increases, the price of the numerical control device increases proportionately9, which can account for a considerable proportion of the machine cost. Currently, most machine manufacturers have only one person producing this numerical control device, which is not very profitable in terms of profitability. The reality is that it is not possible. In the present invention, the purpose of improving economic benefits is to mechanically replace the control of the 0 rotation angle, which is a child of the main drive, without adding a control axis by numerical control. That is.

The present invention will be described below with reference to one embodiment.

(1) is a machine tool (hereinafter referred to as this machine) in which the feed control axis of the tool stand is controlled by numerical control commands, and specifically has the following configuration. (2) is the main shaft, which is supported by the headstock (3) of the machine (1) and is connected to the drive motor (4) and belt (5).
) to rotate at any rotational speed through the suspension.

The spindle drive system includes a position detecting means (6) that detects a unique rotational angular position for each rotation of the spindle (2), and feeds a signal (for example, a pulse) generated by the spindle drive unit (7) to the spindle drive unit (7). , the spindle drive unit (7) generates a pulse equal to a predetermined rotation division angle of the spindle.
) has a function (orientation) to stop. Positioning is done with orientation pins. (
8) is a chuck that grips the workpiece attached to the main shaft (2), (9) is an X-axis slide that can reciprocate in the direction of the rotation axis (Z-axis) of the main shaft (2), and 00) is a chuck that grips the workpiece attached to the main shaft (2). ) is an X-axis slide that can reciprocate in the direction (X-axis) perpendicular to the rotation axis of the
The axis and the Z-axis slide l-'' (10) (9) are combined to form a set of first feed 9 slide bases (A).
The X-shaft and X-axis slide (
+0X9) are each controlled via a servomorph (11) and a ball screw (12) drive means under the control command of number A11'1.

In the present invention, the above set of first feed slide tables (A)
In addition to at least the above X-axis and X-axis slide (
10) The machine (1) has a second feed slide table (B) which forms a combination similar to the combination of (9) and the driving means described above.

2 of the first feed slide table (A) and the second feed slide table (B)
The sets are arranged at -L below or on the left and right sides of the rotational axis of the main shaft (2), and are still separated from each other on the left and right sides.
The Xll71Il slide (10) and the X-axis slide (9), which are arranged on either of the lower sides and constitute two sets (14), are each independently and relatively in the processing area.
The feed operation is controlled by the control axis 1111. (13
) is an indexable talen 1- which is a tool support member installed on the first feed slide (8) and the second feed slide (■).
Kureno 1-(13)l installed on the feed slide table (A)
A turning tool (14) for internal and external diameter machining and a rotary tool (15) are mainly attached to -. The rotating tool (15) is attached to the tool spindle (16) on the shaft (15).
It is held above and rotated in the processing area via a continuous light drive means. (17) is attached to the second feed 9 slide table (G) or the turntable (13) on the second feed slide table (G), and is attached to the main shaft during the feeding operation of the second feed slide table (To). (2), applies rotational speed to the main shaft (2) through the feeding operation of the second feed slider (B), and controls the indexing of the main shaft to a desired rotation angle. The control member has a trochanter 08). (1) is attached to the main shaft (2) or chuck (8) located on the processing area side, and the nuclear control member (1) is
- is a means for indexing the main shaft (2) around the axis of rotation of the main shaft (2) by receiving the dividing groove (1) which engages with the trochanter (18) of the control member (17). The index plate (19)
provided in the radial direction. (20) is the workpiece.

Hereinafter, the functions and effects of the present invention will be explained. When the main shaft (2) is stopped through the orientation function at a specific fixed position rotation angle that interacts with the control sound Pau jr (17) described below and is positioned by the orientation pin, the first feed slider (A) X-axis slide (10)
and rotation on the taleft (16) through the proportional feed movement of the X-axis slide (9) -I:''-! , (15)
is sent to the processing position. At the processing position, the X-axis slide (1
0) or the X-axis slide (9) is stopped, and only the other slide mentioned above first drills a hole in the workpiece in preparation for long hole drilling. When a hole depth of a predetermined size is reached, the feeding of the other slide is stopped. During this time, the rotary tool continues to rotate.

Next, the X-axis slide (9) of the second feed slide (G) advances in the direction of the rotation axis of the main shaft (2), and the The control member (17) is inserted into the dividing groove (19a).
) moves forward to the position where it engages, the Z-axis slide (9) stops, and then the
The "shaft slide" (10) advances toward the rotation axis of the main shaft (2) by an amount equivalent to the feed amount required for machining a predetermined long hole. , Lord 4I
II+ (2)-1 This index plate (υ) is connected to the control member (17
) is regulated and indexed by the trochanter (18) of the control member (17), giving rotational feed to the shaft (2). The workpiece (20
) is used to machine an arcuate long hole on the front surface of the workpiece or a straight long hole on the outer periphery using a rotating rotary tool (15).

As described below, in the present invention, the above-mentioned simple mechanical structure of RFFI can be installed on the machine without adding a control axis for spindle rotation angle control to the numerical control device, so that existing tools can be easily used. The feed control shaft enables long hole machining and reduces machine costs.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a relationship 1'I'+- configuration for giving rotational feed to the main shaft. Patent applicant Miyano Iron Works Co., Ltd.

Claims (1)

[Claims] It has at least two sets of feed slides consisting of an X-axis slide that reciprocates in the force direction of the rotation axis of the main shaft and an X-axis slide that reciprocates orthogonally to the rotation axis, and is controlled by a control axis based on numerical commands. In a machine tool that performs a feeding operation, it is possible to position at a specific fixed position rotation angle.
: means for indexing the main shaft around the rotational axis on the shaft 'f
! : Equipped with one of the feed slides, which engages with the indexing means during the feed operation of the feed slide to apply rotational feed to the spindle through the feed operation of the feed slide to index the spindle. A spindle control device for a machine tool, characterized in that it is equipped with a means for controlling the same, and a rotary tool is mounted on the other feed slide table.