JPS62271614A - Control device for drilling machine - Google Patents

Abstract

PURPOSE:To increase a degree of freedom in drill work, by equipping a device with an automatic control driving means, which controls a drilling machine by a stepping motor inputting a drilling condition program, and a manual control driving means. CONSTITUTION:A drilling machine 1 is vertically movably and adjustably mounted to a column 3 vertically provided on a base 2, and the drilling machine 1, which is constituted of a main unit part 5 and a step-feed mechanism 6 providing a step motor S.P to be arranged, is automatically driven. While a handle lever 15 is provided to be arranged, and a shaft 16 is integrally connected with a shaft 10 of the mechanism 6. A work on the base 2 can be drilled by a drill D by rotatably and vertically moving a spindle 17 through the manual control of a handle. That is, the drilling machine, which is controlled by both the automatic and manual control, enables a degree of freedom to be increased in the drilling work.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Technical Field) The present invention relates to a control device for a drilling machine, particularly a drilling machine that is capable of NC control using a computer and manual control using a handle operation. Regarding a control device.

(Prior art) Drilling machine operated by conventional handle operation and N
There are drilling machines that operate automatically under C control. For any of these types, it may be desirable to have the functions of other types when performing IJ/IJ song work, and conventional drilling machines often feel inconvenient.

(Objective) The object of the present invention is to provide an automatic control drive means and a handle lever for inputting machining conditions into a program using a control device using a microcomputer in the central control section and controlling the feeding of a drilling machine using a stepping motor. An object of the present invention is to increase the degree of freedom in drilling operations by providing a control device for a drilling machine, which is equipped with a manual control drive means for controlling the feed of the drilling machine by manual operation.

(Example) The present invention will be described below with reference to Examples. Figures 1 to 34
In the figure, the trimming machine (1) has a base part (2) that supports a main body part, a column part (3) that is erected and fixed to the base part, and a knob (4) that is loosened with respect to the column part. It consists of a main body part (5) mounted so that the vertical position can be adjusted in a state of Step motors (s, p) are arranged in (7), and a worm gear (9) is fixed to a shaft (8) that rotates integrally with the output shaft of the pulse motor.
] This is an automatic drive means that is engaged with the worm wheel I fitted in the llI.

The worm wheel αB is rotatably supported with respect to the axis 00, although its position in the thrust direction is restricted. Q2
is a clutch plate, which can be moved along the shaft (11) by loosening the setting screw (Ij), and at the solid line position in Fig. 1, the bottle (1mm) is connected to the worm wheel aD.
The rotation of the worm wheel αυ is transmitted to the shaft Ql via the clutch plate Q3. The pin (12m) is removed from the hole, allowing the axis α to freely rotate relative to the worm wheel 0. I is a detection unit for limiting the amount of rotation of the shaft 11 (I. al
is a handle lever, and the shaft ae rotated by the handle lever is integrally connected to the shaft (11) of the mechanism part (6), and when the clutch plate α is at the position shown by the two-dot chain line in Fig. By rotating the handle, the spindle (
A quill that rotatably holds Iη (Is can be manually moved to the main body (
5) is held so that it can be moved up and down. The quill is a depth gauge that indicates the vertical movement position of the quill. A drill ([1) is removably attached to the spindle aD via a collet handle.Qυ is a drill for adjusting the rotational speed of the spindle αn,
) is a lighting lamp, (c) is a power switch, and Q is a power cord.

Next, the feed control method of the present invention will be explained. The feed control of the drill is performed as shown in FIG. 4, where L is the low-speed cutting feed amount, r is the collision prevention clearance, N is the number of repetition steps, and Nl is the step order. First, after descending from the starting point (8) to the cutting point (2), which is set about 0.2- to 1-degree above the top surface of the broken workpiece, with ≠ feed (solid arrow), the repeating step starts. death,
The first step is to descend by L (dotted arrow) at low speed from the cutting origin (red), then return to the cutting origin red (solid arrow) by rapid traverse, and then descend at the low speed described above with rapid traverse. The first step is completed by rapidly descending (solid arrow) to the front by the collision prevention clearance r.
In the second step, the tool first descends by t at low speed from the rapid traverse reach point in the first step, then returns to the cutting origin (6) by rapid traverse, and then rapidly moves to a point where the clearance r is lower than the reach point reached at low speed. Go down in fast forward until you reach the second position.
The step is completed and the steps are repeated in the same way.
After completing the preset number of steps, the process returns to the starting point (8). In Iris 6, (&), (b)
and (C) respectively show, in this order, the low-speed cutting feed process of the N1 step, the process of returning to the cutting point origin by rapid traverse, and the descending process by rapid traverse, the double-dashed arrow indicates the range of one step, and the clearance r is This is to prevent the drill from descending in rapid traverse beyond the already machined depth after the step has progressed and the actual cutting of the workpiece has begun.

The feature of the control of the present invention is that each step in FIG. 4 is deepened in the order described above, and the rapid feed amount on the descending side of the Ni-th step is N1 (t-r) when measured with respect to the cutting origin.
The program is set up so that. As a result, the net cutting feed amount after the second step.

This is obtained as the difference between the cutting feed amount t and the clearance r while maintaining the clearance r, and a minute net cutting feed amount can be obtained.

That is, the feed amount N1 (t-r”) of the % N1 step,
By control order within each step.

Six quantities of the N1th step shown below are derived.

Reach depth = (rapid feed amount of previous step) + (cutting feed amount) W (Ni-t) (z-r) + Net cutting feed amount - (reach depth) - (reach depth of previous step) = g (
Ni-1)(A-r)+A((Ni-2)(1-r)+
L ) w A -r However, although the previous step is not defined for the net cutting feed amount of the first step, since the cutting origin position is equivalent to the depth reached in the previous step, the net cutting feed amount in the first step is It becomes equal to the depth t. The above six amounts in each step are shown in Table 1 attached.

The feed control shown in Fig. 4 consists of repeated steps.
As an example of pattern control, according to the present invention, drilling can be performed using a plurality of patterns. For example, in the early stages of machining, a pattern consisting of repeated steps with a small net cutting feed amount is used, in the middle stage the net cutting amount is increased, and in the latter stages it is reduced, and the cutting feed rate can also be changed for each pattern. .

The series of feed controls described above are controlled by a program pre-installed in a computer such as a microcomputer (c).
The display (5) and printer (c) are output devices for inputting the program of machining conditions such as the number of steps N for repetition of one cutting feed amount t%, and for displaying and confirming the contents inputted in the program, respectively. The stab circuit wire is a circuit for automatic stop or emergency stop in the event of an abnormality during drilling, the drive circuit (to) is a circuit for driving the step motor (8, P'), and the detection part I is a circuit for the mechanism part (6). ) is arranged on the axis OG of the shaft, and regulates the rotation range of the axis tilt.

FIG. 7 shows a general flowchart of a subroutine program for feed control.

According to the method of the present invention described above, the value of the clearance r is stored in advance in the computer, a program corresponding to the flowchart shown in FIG. 7 is created, and the cutting feed amount is adjusted as described above. All you have to do is input the machining conditions into the program, so rwo is set to - and A
By setting WO, 11-, it is possible to easily obtain a net cutting amount of 0.01 after the second step given by A-r, and the first net cutting amount is A-=0.11. − So.

This also works effectively on the amount of play from the cutting origin (6) to the machined surface.

For reference, the basic capabilities related to feed control that can be set on an actual machine that embodies this method are as follows: Net cutting feed amount: 0.
Repeat at 0.01-intervals from 01- to 99.991 t) Return,
．． Range cutting feed rate at 99-years old: 0.2 m/8 ~ 1.6 m/8 (
5-stage PL) Rapid traverse speed: 4 m/8.

(Effects) As described above, according to the present invention, it is possible to perform automatic control of the drilling machine by an NC control device using a stepping motor and a microcomputer, or to perform manual control by manual operation of the handle lever. , and the remarkable effect that there is no adverse effect on the mechanism on the automatic control side during manual control can be obtained.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a front view of a drilling machine, FIG. 2 is a left side view of the drilling machine, FIG. 3 is a right side view of the drilling machine, and FIG. 4 is a drill feed control. FIG. 6 is a diagram showing a part of FIG. 4, FIG. 6 is a block diagram of the numerical control device, and FIG. 7 is a general flowchart of the feed control program. In the figure, (ri is a drilling machine, (D) is a drill, (K
) is the cutting origin, (4 is the low-speed cutting feed rate, the same is the number of repeated steps, rNi) is the step order, (r) is the clearance, (S) is the starting origin, (s, p) is the step motor be. Patent applicant: Janome Sewing Machine Industry Co., Ltd. Inventor: Kenji Kato

Claims (1)

[Claims] a base portion that supports the main body portion, and the base portion; A column part erected in the section, and a column part installed in the column part. The attached main body and the a quill held movably downward; and the quill a spindle rotatably supported on the Can be attached to and detached from the spindle via a collet Drillin with attached drill In the machine, the quill is moved up and down. step motor and output of the motor to The worm gear fixed to the force shaft and the worm gear Worm wheel meshed with mugia automatic drive means consisting of a rotatably supported between the handle lever and the handle lever It consists of a shaft that can be rotated by operation. manual drive means and said handle lever hand; The rotation of the shaft is controlled by the wormhole during dynamic operation. A clutch means that does not transmit power to the wheels is installed. A drilling machine with a unique feature of Control device.