JPS6063102A - Regulating mechanism of speed of feeding of wood of automatic plane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material feeding speed adjusting mechanism that controls the feeding speed according to the cutting load state of an automatic planer.

Conventional automatic planing machines are equipped with separate electric motors as power sources for driving the rotary fishing force and for driving the material feeding member, and the operator can adjust the material feeding speed according to the width of the workpiece and the depth of cut. The material feeding speed was selected by operating the adjustment mechanism to control the speed of the electric motor for driving the material feeding member.

However, when cutting a material, the cutting load resistance applied to the rotating fishing force is proportional to the material width, cutting depth, and material feeding speed.
In other words, it increases in proportion to the amount of cutting per certain period of time, and when an operator cuts a material whose width and thickness are not constant, or when cutting a material with the maximum cutting width that can be cut. When attempting to cut with the maximum depth of cut, if an inappropriate material feeding speed is selected, the cutting load resistance will be excessive and the rotational speed of the electric VJ machine for rotating fishing force will decrease, resulting in a poor cutting surface. becomes worse. There is a problem in that when cutting a hard phase material with a fishing force whose sharpness has deteriorated, or when cutting under poor power supply conditions, the electric motor becomes locked.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a mechanism that allows the upper limit of the cutting load resistance applied to the rotary saw blade to be arbitrarily selected within a range that does not deteriorate the finished cutting surface of paulownia material. This upper limit value is compared with the actual cutting load resistance during cutting, and the rotational speed of the material feeding member is automatically changed to increase or decrease the material feeding speed according to the result, and the cutting surface of the material is improved. The aim is to uniformly finish and improve the

The present invention focuses on the fact that even if the cutting load resistance applied to the rotary saw blade increases or decreases, if it is kept below a certain cutting load resistance, the cutting surface of the material can be uniformly finished. If the resistance increases and the rotation speed of the rotary saw blade decreases below the rotation speed corresponding to the preselected upper limit of cutting load resistance, the material feed speed is reduced and the rotation of the plane barrel is reduced. In order to restore the number of materials, the number of rotations of the rotary saw blade and the rotation speed of the material feeding section are measured, converted into appropriate electrical signals, and a circuit configuration that can compare the two electrical signals is constructed. The connections of the speed detector, conversion circuit, voltage divider, comparator circuit, and phase control circuit are devised so that the semiconductor elements connected to the power circuit of the member-driving motor can be phase-controlled in synchronization with the power supply frequency.

An embodiment of the present invention will be explained using the schematic configuration diagram of an automatic plane machine shown in FIGS. 1 and 2. FIG. 1 shows a front view of an automatic plane machine, in which a head 2 is arranged on a base 1,
These members are connected and fixed by a plurality of columns 3.

The material feeding table 4 is attached to the column 3 so as to be slidable in the vertical direction, and is supported by the base l via a screw shaft 5. The material feeding table 4 is moved in the vertical direction by rotating the screw shaft 5 by operating a lift handle (not shown), a reversible electric motor, or the like.

FIG. 2 shows a left side view and an elevation view of the head 2 shown in FIG. A plane barrel 7 to which a plurality of fishing forces 6 are connected is rotatably supported by the head 2 and is incorporated in the head 2 so as to be rotationally driven by an electric motor 9. Further, a material feed roller 8 is rotatably supported at the front and rear of the plane barrel 7, and is incorporated so as to be rotationally driven by an electric motor 10. Therefore, it is equipped with two electric motors: an electric motor 9 that rotationally drives a rotary saw blade constituted by a fishing force 6 and a planer body 7, and an electric motor p that rotationally drives a material feeding roller 8 that serves as a material feeding member. If the dimension between the upper surface of the material feeding daple 4 and the fishing force 6 is the material feeding interval, the cutting finish when the material is fed by the material feeding roller 8 and cut by the fishing force 6. This is the size. When finishing the material to a predetermined thickness, set the feed interval so that the depth of cut is equal to the difference between the material thickness and the finished thickness, and turn on the switch ■ to operate the motors 9 and 10. The material is cut by the rotating fishing force 6 while being fed by the feed roller 8.

When cutting a material, the cutting load resistance applied to the fishing force 6 increases in proportion to the width of the material, the depth of cutting, and the feeding speed. When the cutting load resistance becomes excessive, the rotational speed of the plane cylinder 7 to which the fishing force 6 is connected decreases, resulting in poor finish of the cutting surface of the material), and sometimes the plane cylinder 7 and material feeding roller 8 are The driving electric motor may lock up, making it impossible to feed and cut the material.

If the cutting load resistance increases or decreases during material cutting, by adjusting the rotational speed of the feed roller 8 and changing the feed speed according to the fluctuation, it is possible to keep the cutting load resistance almost constant and improve the finish. The surface finish can be made uniform, the electric motor can be prevented from locking, and cutting work can be carried out smoothly.

In addition, the upper limit of the cutting load resistance applied to the fishing force 6 is
If it can be adjusted arbitrarily, cutting work can be performed with the finished state of the cutting surface divided into rough, medium, and finishing. However, if the cutting load resistance is incorrectly set, or if the cutting work is performed with a plate width or depth of cut that causes the cutting load resistance to be excessive, the finish of the cut surface may become poor, or the electric motor may become locked, so the actual cutting load resistance becomes larger than the set upper limit value of the cutting load resistance.In this case, it is necessary to adjust the rotational speed of the material feeding roller 8. In other words, according to the increase or decrease in the actual cutting load resistance, so that the cutting work is performed below the set upper limit of the cutting load resistance,
It is necessary to automatically adjust the material feeding speed.

A circuit that realizes this problem is a block circuit diagram shown in FIG. 3.

- Figure 3 will be explained below.

A switch (■) is connected in series to the single-phase power supply lines L1 and Ia, and the electric motor 9 that rotationally drives the fishing force 6 is directly connected to the load side of the switch H. Triac ν as a semiconductor device for power switching
are connected in series. The triggering operation of the triac is performed by outputting a trigger pulse from the phase control circuit which receives the power synchronization signal 16 from the power synchronization circuit B, which detects the synchronization of the power supply voltages applied to both ends of the triac.

When cutting the material, the magnitude of the cutting load resistance applied to the fishing force 6 is:
This can be determined by detecting an increase or decrease in the rotational speed of the button 7 that connects the fishing force 6. Therefore, the rotational speed of the output shaft of the electric motor 9, or the gears, sprockets, chains, belts, etc. of the power transmission mechanism that transmits the rotation of the electric motor power to the button 7, the rotational passage of the fishing force 6, etc. are detected. It can also be understood by The speed detector used here may be a magnetic type, an optical type, or a power generation type detector depending on the shape and material of the member to be detected.

FIG. 3 shows an example of measuring the rotational speed of the output shaft of the electric motor IO. The output signal of the speed detector 5 is obtained as a DC pulse signal corresponding to the rotational speed of the electric motor 10 as an AC signal, and is configured to be converted into an appropriate electric signal by an exchange circuit 16. The conversion circuit 16 is configured with an FV conversion circuit if the input signal is a DC pulse signal, and a rectification and smoothing circuit if the input signal is an AC signal.

As the cutting load resistance applied to the fishing force 6 increases, the rotation speed of the electric motor 9 decreases, and the converter circuit stop output voltage also decreases, so by measuring the output voltage, the cutting load resistance can be reduced. can be grasped.

In order to arbitrarily set the magnitude of the cutting load resistance, the output signal of the conversion circuit 5 corresponding to the rotation speed of the electric motor 9 is voltage-divided by applying a variable resistor, and the electric motor is By controlling the rotational speed of the force, the material feeding speed by the material feeding roller 8 is automatically adjusted.

On the other hand, regarding the detection mechanism for the rotational speed of the material feeding roller 8,
Using the same method as the mechanism for detecting the rotational speed of the electric motor 9, the rotational speed of the electric motor υ is quickly detected by a speed detector and converted into a voltage signal by a conversion circuit. A comparator circuit 17 inputting the output voltage of this conversion circuit and the voltage divided by the variable resistor compares the magnitude, and when 'w>w, the power of the motor υ is calculated. When Vs<V2, the power of the electric motor p is decreased, and the material feeding speed is controlled to slow down the rotational speed of the material feeding roller 8.

The voltage v1 corresponds to the upper limit value of the cutting load resistance desired by the operator, and is set at an appropriate location on the main body as shown in Figure 1 so that the variable resistor can be adjusted and set as desired. It is arranged.

The output signal is connected to the phase control circuit 14.

The output signal of the comparator circuit 17 is the logic rlJ of the phase control circuit.
When , by increasing the conduction angle of triac n, the electric motor ■
Increase the power and speed up the material feeding speed.

When the logic is "0", the conduction angle of the triac ν is reduced,
Reducing the power of the electric motor lO and slowing down the material feeding speed,
The operator can arbitrarily set the upper limit of the magnitude of the cutting load resistance applied to the fishing force 6, and the material feeding speed is automatically adjusted so that the cutting work can be performed below the set upper limit of the cutting load resistance. can be done.

According to the present invention, the circuit is configured to detect the fishing force 6 and the rotational speed of the rotational drive transmission system of the material feeding roller 8 and grasp the cutting load resistance and material feeding speed. The load current can be measured from the voltage drop using an OT current detector, low resistance, or detected by a Hall element, etc., and the cutting load resistance and material feeding speed can be determined from the load current. In this case, the same control as described above becomes possible by rectifying and smoothing the output signal from the current detector and connecting it to the input of the next stage circuit.

According to the present invention, an electric motor for driving a rotary button blade and an electric motor for rotating a feeding roller are provided, and a mechanism is provided in which an operator can arbitrarily select and regulate an upper limit value when cutting load resistance increases during feeding cutting, If the actual cutting load resistance during cutting exceeds the selected cutting load resistance, the rotational speed of the electric motor for driving the material feeding roller is controlled to reduce the material feeding speed. Since the load resistance is reduced, even when cutting a material with uneven plate width and plate thickness, a uniform cut surface can be obtained.

Further, since the upper limit value of the cutting load resistance can be arbitrarily selected, it is possible to obtain a uniform cutting surface and to improve the finish of the cutting surface in υ.

Also, the material feeding speed can be automatically adjusted according to the increase or decrease in cutting load resistance, so even if the operator accidentally selects the upper limit value of cutting load resistance, the motor will lock and the material will not be able to be cut. I no longer fall into this situation.

For this reason, it is possible to improve the cutting work efficiency, reduce the labor of the operator, and improve the uniformity of the cut surface, which greatly improves the material cutting work performed by automatic plane machines. did it.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of an automatic plane machine of the present invention, FIG. 2 is a left side view and an elevation view of a portion of FIG. 1, and FIG. 3 is a block circuit diagram. In the figure, 1 is the base, 2 is the head, 3 is the column, and 4
is the material feeding table, 5 is the screw shaft, 6 is the fishing force, 7 is for the button, 8
is a material feeding roller, 9 and υ are electric motors, 11 is a switch, ℃ is a triac, B is a power synchronization circuit, 14 is a phase control circuit, 15 and 18 are speed detection circuits, 16 and υ are conversion circuits, 1
7 is a comparison circuit, and numeral 7 is a variable resistor.

Claims (1)

[Claims] A material feeding path is formed by the material feeding table facing the rotating fishing force, or the material feeding member, and either of them is raised and lowered according to the thickness of the material and the processing dimensions, and the material feeding path is "Seikuchi" Noh,
A mechanical planer that feeds material with a material feeding member and performs cutting using a rotating fishing force, has two electric motors that rotate the rotating fishing force and the feeding member, respectively, and performs material cutting. a detector that detects the state of cutting load applied to the rotating fishing force during processing; a first conversion circuit that receives the output and converts it into an appropriate electrical signal;
a voltage divider that divides the output signal of the first conversion circuit;
A detector for detecting the material feeding speed of the feeding I member and a second conversion circuit for receiving the output of the detector and converting it into an appropriate electrical signal are provided, and the output from the second conversion circuit and the voltage divider is provided. A comparison circuit is provided to compare the signal magnitude, and the transmission Is @ drive current w is also provided.
A semiconductor element for power switching is connected in series to the power circuit of the J machine, a phase control circuit is provided to control the conduction angle of the semiconductor element in synchronization with the power frequency, and the output signal of the comparison circuit is connected to the phase control circuit. A material feeding speed adjustment mechanism, characterized in that the rotational speed of the electric motor for driving the material feeding member is controlled.