JPH06312348A - Electronic drilling machine - Google Patents

Abstract

PURPOSE:To provide an electronic drilling machine, by which even a beginner can carry out drilling and tapping of uniform quality. CONSTITUTION:In an electronic drilling machine, in which drilling and tapping are carried out according to the rotation of a main spindle at continuously varied speeds by controlling a speed of a main spindle motor steplessly by means of an inverter, a main spindle number of revolutions indicator 11, in which the number of revolutions of the main spindle is displayed graphically, a distance indicator 19 indicating the longitudinal position of the main spindle, and a depth setting button 20 setting a tap depth in the distance indicator 19 are arranged on an operation panel 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention employs a spindle motor as an inverter.
The present invention relates to an electronic ball board that performs drilling and tapping operations by continuously stepping up and down rotating a main shaft with stepless speed change control.

[0002]

2. Description of the Related Art Conventionally, when performing drilling and tapping work on a general-purpose type boring machine for performing drilling and tapping work, an indicator for displaying the number of rotations of the main spindle is mounted on the general-purpose type boring board.
Also, since there is no indicator for displaying the vertical position of the spindle, the operator intuitively adjusts the spindle speed based on his work experience, and performs drilling and tapping at the rotation speed that he feels is optimal. There is.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When performing drilling and tapping operations with a tool, the worker intuitively adjusts the spindle speed based on his work experience and works at the rotation speed that he feels is optimal, so sufficient work experience is required for the work. Therefore, there is a problem that it is difficult for beginners to perform drilling and tapping with uniform quality.

Therefore, in the present invention, a person working on a ball board can (1) quantitatively recognize the spindle rotational speed,
(2) In order to recognize the vertical position of the spindle, (3) It should be possible to solve the problem that even beginners can perform uniform drilling and tapping operations by setting the tap depth arbitrarily. This is a technical issue.

[0005]

The technical means for solving the above-mentioned problems is to perform a drilling operation and a tapping operation by continuously controlling the main shaft motor by an inverter so as to rotate the main shaft continuously. In the electronic ball board for performing (1), the number of revolutions of the main shaft is detected, and the number of revolutions display means for graphically displaying the number of revolutions is provided. (2) The vertical position display means for detecting the vertical position of the spindle and displaying the vertical position is provided. (3) The tap depth setting means for setting the tap depth by a numerical value is provided, and the reverse rotation control means for reversing the rotation of the spindle is detected when it is detected that the spindle has descended to the set depth.

[0006]

In the above electronic ball board, (1) By providing a rotation speed display means for detecting the rotation speed of the spindle and displaying the rotation speed graphically on the operation panel surface or the like, the operator can perform drilling and The rotation speed of the spindle can be quantitatively recognized by the rotation speed display means during tapping. (2) By providing vertical position display means for detecting the vertical position of the spindle and displaying the vertical position on the operation panel surface or the like, the worker can use the vertical position display means to display the vertical position of the spindle during drilling and tapping. It can be recognized quantitatively. (3) By providing a tap depth setting means for setting the tap depth with a numerical value on the operation panel surface or the like, when the tap depth reaches the set value during tap work, the rotation direction of the spindle is automatically reversed. The worker can uniformly machine to a predetermined tap depth.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an electronic ball board 1 for performing drilling work and tapping work, and FIG. 2 is a side view of the electronic ball board 1. As shown in FIGS. 1 and 2, an operation panel 3 is attached to the front of the head portion 2 of the electronic ball board 1. The main shaft 4 has a table 5 on the lower surface of the head 2.
It is projected perpendicular to the plane. Further, a handle 6 for raising and lowering the spindle is provided on the right side surface of the head portion 2, and a gear shift handle built in the head portion 2 is provided on the left side surface of the head portion 2.
Shift handle 7 for moving the gear to increase or decrease the gear ratio
Is equipped with.

FIG. 3 is a front view of the operation panel 3.
As shown in FIG. 3, a spindle speed indicator 11 is arranged on the upper portion of the operation panel 3 in a semicircular bar graph shape.
The display 11 is composed of a light emitting diode (LED). The spindle rotation speed display 11 indicates the rotation speed per minute. A gear shift adjuster 12 for adjusting the rotation speed of the main shaft 4 is attached to the lower side of the main shaft rotation speed display 11. The rotation speed of the spindle 4 increases as the gear shift adjuster 12 is rotated clockwise.

On the right side of the gear shift adjuster 12, a forward rotation display light emitting diode 13 which indicates that the main shaft 4 rotates in the forward rotation direction, and a reverse display which indicates that the main shaft 4 rotates in the reverse rotation direction. A light emitting diode 14 for rotation display is attached. The drill / tap switching button 15 is switched when the drill work or the tap work is selected, and the drill mode selection lamp 1 is pressed each time it is pressed.
6 and the tap mode selection lamp 17 are alternately turned on,
It indicates that the mode of the lit lamp has been selected.

The preset button 18 is operated by operating the handle 6 for moving the spindle up and down so that the tip of the drill mounted on the spindle 4 is brought into contact with the drilling position of the work fixed to the table 5. When pressed in the state, the preset button 18
The display value of the distance indicator 19 composed of a large 7-segment LED provided on the lower side is 0.0 mm, and the depth of drilling from this position is displayed on the distance indicator 19.

When the tap mode selection lamp 17 is lit and the tap mode is selected, tap work is possible. When setting the tap depth of the work in tapping, when the spindle vertical handle 6 is operated to lower the spindle 4 and the displayed value of the distance indicator 19 coincides with the target depth, When the setting button 20 is pressed,
While the non-setting lamp 21 is turned off, the setting completion lamp 22
Lights up and the target value is set as the depth for tap work. The depth confirmation button 23 is pressed when confirming the depth set value on the distance display 19. In the state where the depth setting is completed as described above, when the tap depth reaches the target depth, the rotation direction of the spindle 4 is reversed, the tap comes out of the work, returns to the original position, and then returns to the normal position. Return to rolling.

The start button 24 is pushed when the spindle 4 is rotated, while the stop / reset button 25 is pressed.
Is used to stop the rotation of the main shaft 4, and
It is pushed when resetting the abnormality of the data. Further, the jogging reverse rotation button 26 reverses the main shaft 4 while the button 26 is being pressed in the tap mode, and causes the spindle 4 to return during the tapping process. In addition, the inverter abnormality display lamp 27
Lights up when the spindle motor drive inverter becomes abnormal due to an excessive load or the like.

FIG. 4 is a block diagram of an electronic circuit of the electronic ball board 1. As shown in FIG. 4, the electronic ball board 1 is provided with a spindle motor 31 for rotating the spindle 4 in the forward and reverse directions.
An inverter 32 is used to control the speed of the motor 31 by changing the frequency. Since the spindle speed indicator 11 is formed of an LED (light emitting diode) as described above, a rotation speed LED lighting circuit 33 for controlling lighting of the light emitting diode is provided. The F / V conversion circuit 34, which outputs a lighting signal for lighting the spindle rotation speed indicator 11 up to a region corresponding to the rotation speed of the spindle 4 to the rotation speed LED lighting circuit 33, is transmitted to the rotation speed LED lighting circuit 33. It is connected.

A proximity switch 35 is connected to the F / V conversion circuit 34. The proximity switch 35 is attached to the detection target member 36 mounted so as to rotate in conjunction with the rotation of the main shaft 4, and each proximity projection. A pulse signal is output each time the portion 36A approaches, and the F / V conversion circuit 34 is configured to rotate at the rotational speed LE as the input interval of the pulse signal becomes shorter.
The D-lighting circuit 33 outputs a lighting signal having a higher rotation speed.

The distance indicator 19 is composed of a large 7-segment LED as described above, and a numeral is emitted by a display signal from an up / down counter circuit 37 connected to the distance indicator 19. The preset button 18 is connected to the up / down counter circuit 37. When the preset button 18 is pressed, the up / down counter circuit 37 outputs a display signal corresponding to a display value of 0.0 mm. It

An up / down signal conversion circuit 38 is connected to the up / down counter circuit 37. The up / down signal converting circuit 38 is connected to an encoder 39. The encoder 39 corresponds to the vertical position as the spindle 4 is moved up and down by operating the spindle up / down handle 6. It outputs a pulse signal. The up / down signal conversion circuit 38 adds / subtracts the signal from the encoder 39 and outputs the added / subtracted value to the up / down counter circuit 37.

An original position storage circuit 40 is connected to the up / down signal conversion circuit 38. The original position storage circuit 40 stores the spindle position when the power is turned on.

Further, the tap storage circuit 41 operates the main shaft up / down handle 6 to lower the main shaft 4 when setting the tap depth of the work in the tap work, and the value displayed on the distance display 19 is displayed. Is stored when the depth setting button 20 is pressed. The original position memory circuit 40 and the tap memory circuit 41.
Is connected to an inverter control circuit 42 for controlling the inverter 32. The inverter control circuit 42 outputs a control signal to the inverter 32 via the photocouplers 43, 44 and 45. The photo coupler 43
Means that when the inverter control circuit 42 outputs a normal rotation signal for rotating the main shaft 4 in the normal direction (when the output terminal becomes low), the light emitting diode emits light and the transistor is switched on. When the transistor is switched on, the inverter 32 rotates the spindle motor 31 in the forward direction at a rotation speed based on the resistance value of the variable speed variable resistor 12R according to the adjustment of the speed change regulator 12. At the same time, the forward rotation display light emitting diode 13 is turned on.

Further, the photocoupler 44, when the inverter control circuit 42 outputs a reverse rotation signal for rotating the spindle 4 in reverse, when the light emitting diode emits light and the transistor is switched on, the inverter is turned on. Reference numeral 32 rotates the spindle motor 31 in the reverse direction, and the reverse rotation display light emitting diode 14 is turned on. Further, in the photocoupler 45, the transistor is switched on when set in the drill mode and the transistor is switched off when set in the tap mode.
In the drill mode, the acceleration / deceleration time of the spindle motor 31 is set to be relatively long, while in the tap mode, the acceleration / deceleration time of the spindle motor 31 is set to be short.

The drill / tap switching button 1
5, the start button 24, the stop / reset button 25, and the inching reverse rotation button 26 are directly connected to the inverter control circuit 42 in a pulled-up state. Further, the drill mode selection lamp 16 and the tap mode selection lamp 1
7, the unset lamp 21, and the setting completion lamp 22 are controlled to be turned on and off by the inverter control circuit 42.
When the spindle motor driving inverter is in an abnormal state due to an excessive load or the like, the inverter abnormality display lamp 27 becomes an abnormal output terminal high of the inverter 32, and the not gate 46 Lights up because the output side of becomes low.

[0021]

As described above, according to the present invention, the spindle mode is
(1) In the electronic ball board for performing the drilling work and the tapping work by continuously increasing / decelerating and rotating the main shaft by controlling the continuously variable transmission with the inverter, (1) detecting the rotational speed of the main shaft,
Rotational speed display means for graphically displaying the rotational speed, (2) Vertical position display means for detecting the vertical position of the spindle and displaying the vertical position, (3) Tap depth setting for numerically setting the tap depth Since the means is provided, the drilling work and the tapping work are facilitated, and even a beginner can perform the drilling work and the tapping work with uniform quality.

[Brief description of drawings]

FIG. 1 is a front view of an electronic ball board.

FIG. 2 is a side view of an electronic ball board.

FIG. 3 is a front view of an operation panel of the electronic ball board.

FIG. 4 is an electronic circuit block diagram of an electronic ball board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic ball board 2 Head part 3 Operation panel 4 Spindle 5 Table 6 Spindle up / down handle 11 Spindle speed indicator 12 Gear shift adjuster 13 Forward rotation display light emitting diode 14 Reverse rotation display light emitting diode 19 Distance display 20 Depth setting button 31 Spindle motor 32 Inverter 35 Proximity switch 39 Encoder 42 Inverter control circuit

Claims (3)

[Claims] 1. An electronic ball board for performing a drilling operation and a tapping operation by steplessly increasing / decelerating and rotating a main spindle by controlling the main spindle motor by a continuously variable transmission with an inverter. An electronic ball board provided with a rotation speed display means for detecting the rotation speed and displaying the rotation speed graphically. 2. An electronic ball board for performing a drilling operation and a tapping operation by steplessly increasing / decelerating and rotating the main spindle by controlling the main spindle motor with a continuously variable transmission by means of an inverter. An electronic keyboard characterized by being provided with vertical position display means for detecting and displaying the vertical position.
Ru board. 3. A tap depth is a numerical value in an electronic ball board for performing a drilling operation and a tapping operation by continuously increasing / decelerating and rotating the main spindle by controlling the main spindle motor by a continuously variable transmission with an inverter. An electronic ball board comprising: a tap depth setting means for setting; and a reverse rotation control means for reversing the rotation of the spindle when detecting that the spindle has descended to the set depth.