JP2564750B2 - Electronic ball board - Google Patents

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 display 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 with the tool ,
For beginners it is necessary to have sufficient experience,
Difficult to drill or tap with the same quality
There is a problem.

Therefore, in the present invention , even if a worker is a beginner,
Capable of drilling and tapping with uniform quality
Is a technical problem to be solved.
It

[0005]

The technical means for solving the above-mentioned problems is to measure the tip of the main shaft by rotating the main shaft and moving it in the axial direction.
The tool attached to the hole is used for drilling and tapping the work
In an electronic ball machine for machining, the spindle is moved in the axial direction.
Movement signal output means for outputting a movement signal according to movement,
The axial position of the spindle is calculated based on the movement signal.
Position calculation means and the position calculated by this position calculation means
The indicator that displays the axial position of the spindle and the spindle
The tip of the worn tool is in contact with the surface of the work
The display value of the display shows the reference value when operated with
To preset the position calculation means and
When drilling or tapping the work
A program that displays the machining depth from the work surface on the display.
And reset means . In addition, the electronic
-A tool for tapping that is attached to the spindle of
Based on the position where the tip position contacts the surface of the work
If you set and store the tap depth when tapping
Also, this set tap depth is displayed numerically on the display.
And tap depth setting means
When the tip of the cutting tool reaches the set tap depth
The main shaft is automatically rotated in the reverse direction to
Control means for controlling the tool so that it will come out of the work;
Is to prepare .

[0006]

According to the electronic ball board having the above structure, it is possible to cope with the work.
When performing drilling or tapping with
The machining depth from the work surface is displayed on the display by the step.
The operator can display the
While checking the processing depth, drilling and
Can be processed. Also, in tap processing,
The tap depth is set in advance and the tip of the tool for tapping is in front
When the set tap depth is reached, the spindle automatically rotates in the reverse direction.
So that the tapping tool can be removed from the work.
That it is controlled.

[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.

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, the spindle vertical handle 6 is operated to lower the spindle 4, and when the display value of the distance indicator 19 matches 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 tapping work, and the display value of 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
Is a light emitting diode which emits light when a normal rotation signal for rotating the main shaft 4 in the normal direction is output from the inverter control circuit 42 (when the output terminal becomes low), 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 shift controller 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 work
When drilling or tapping, the work surface
The machining depth from can be displayed on the display.
Therefore, the operator looks at the machining depth displayed on the display unit.
Drilling and tapping to the target depth
Even if the operator is a beginner, the quality is uniform because it is possible.
It is possible to perform various drilling and tapping. Also,
In tap processing, tap depth is set in advance and tap processing is performed.
When the tool tip for the tool reaches the set tap depth,
Automatically rotates in the reverse direction, and tap tools can be used from the work
Since it is controlled so that it will come out, if the worker is a beginner
Can also be tapped 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] 1 Electronic ball board 2 Head section 3 Operation panel 4 Spindle 5 Table 6 Spindle up / down handle 11 Spindle speed indicator 12 Gear shift adjuster 13 Forward rotation light emitting diode 14 Reverse rotation Light emitting diode for display 19 Distance display 20 Depth setting button 31 Spindle motor 32 Inverter 35 Proximity switch 39 Encoder 42 Inverter control circuit

Claims (2)

(57) [Claims] 1. The tip of the spindle is rotated and rotated in the axial direction.
The tool attached to the end can be used for drilling or
In an electronic ball machine that processes
Movement signal output means for outputting a movement signal along with movement,
Calculate the axial position of the spindle based on the movement signal
Position calculation means and the position calculation means
An indicator for displaying the axial position of the spindle and the spindle.
The tip of the attached tool is in contact with the surface of the work.
The display value on the display indicates the reference value when
To preset the position calculation means
It is said that drilling or tapping was performed on the work
Display the machining depth from the work surface on the display.
An electronic ball characterized by comprising a presetting means.
Board. 2. A tool tip for tapping, which is attached to a spindle.
Based on the position where the end position contacts the surface of the work
It is also possible to set and store the tap depth during tap processing.
Then, display the set tap depth numerically on the display.
Tap depth setting means and the tap
When the tool tip for drilling reaches the set tap depth
The main shaft is automatically rotated in the reverse direction, and the tap processing is performed.
And a control means for controlling the tool to come out of the work.
The electronic ball according to claim 1, further comprising:
Board.