JPS6349402A - Vertical thrusting slicer for woodworking - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vertical slicer that repeatedly moves a workpiece back and forth against a surface plate equipped with a cutting blade to obtain a large number of veneers.

<Prior art> A surface plate equipped with a cutting blade and a material feeding frame equipped with a reversible material feeding belt are placed opposite each other with a material feeding path in between, and the material feeding frame is moved toward and away from the surface plate to control its feeding. The material belt is brought into pressure contact with the workpiece, and cutting pressure is applied to the workpiece during forward feeding.
A vertical slicer for woodworking that applies reverse feeding pressure during reverse feeding is known.

By the way, in this type of vertical slicer for woodworking which has a conventional simple structure, the material feed belt is rotated at a constant speed by a reversible motor, and the workpiece is made to travel at a constant speed.

For this reason, it was not possible to produce a material feeding speed that matched the conditions such as the material quality and thickness of the workpiece, resulting in rough cutting surfaces and uneven thicknesses.

Therefore, in order to match the material of the workpiece, we have used a motor with a pole number changer for the material feed motor, installed pulleys with different diameters in multiple stages so that the belt can be hooked and changed, and By replacing the pulley with a different pulley, etc., it was possible to obtain a material feeding speed that matched the material to be processed. However, this method has drawbacks such as being limited in the types of changes and not being able to quickly change the rotational speed. Therefore, attempts have been made to use an inverter to make the motor rotation speed variable, but the torque also decreases when the speed is lowered. If the material is transported at a constant speed, there are drawbacks such as the material stopping.

In addition, in the reverse stroke where cutting is not performed, the material is transferred at the same speed as in the forward stroke, resulting in a longer cycle time and poor work efficiency.

The present invention allows the transfer speed to be freely selected from low to high speeds, provides an appropriate torque corresponding to the conditions of the processed material, and can be easily controlled by patterning the condition settings. The purpose of this invention is to provide a vertical slicer for woodworking that can be used in woodworking.

Means for Solving the Problems> The present invention comprises: a three-phase induction motor for running a reversible material belt; a key input means; a first storage device in which a plurality of linear characteristic functions having different slopes are preset;

A second storage device into which function designation values and command speeds are inputted in relation to the material feeding pattern corresponding to the thickness of the workpiece, material fJ, etc.; A central control unit CPU that reads a function specification value and a command speed from the second storage device and calculates the frequency and output voltage based on the read information and the information in the first storage device; The present invention is characterized by controlling an output control device that generates the frequency and output voltage based on the specified frequency and output voltage and inputs them to the three-phase induction motor.

Note that the first storage device and the second storage device may be configured as the same storage device, or the former may be a fixed storage memory (ROM) and the latter may be a rewritable storage device (RAM).
) may be configured.

A second memory device in which the specified function value and command speed are input in relation to the material feeding pattern corresponding to the thickness, material, etc. of the workpiece. In relation to the material feeding pattern corresponding to material thickness, material quality, etc., the specified function value and
Command speed has been input.

This relationship requires, for example, a large torque when cutting a hard material or when cutting a large thickness.
Among the linear characteristic functions of output voltage and frequency set in the first storage device, a function with a large slope is selected by a function specified value, and its command speed is specified and set as a material feeding pattern.

In addition, in the above-mentioned material feeding pattern, by setting data for normal feeding and reverse feeding, it is also possible to realize high-speed/low-torque operation during reverse feeding.

Then, by specifying the pattern using the key input method,
The central control unit cPU determines the required output voltage and frequency from the information in the first storage device based on the designated-order characteristic function and the command speed.

In other words, the rotation speed of the three-phase induction motor is controlled by the frequency that determines the rotation speed of the rotating magnetic field, so the command speed (
If the motor rotational speed or material feeding speed) is specified, the frequency will be determined, and the output voltage corresponding to the frequency will be determined based on the specified-order characteristic function. The output voltage and frequency specified by the central control unit CPU are outputted by the output control unit and input to the three-phase induction motor. By selecting the frequency, the rotational speed of the three-phase induction motor becomes a predetermined value, and the output voltage produces a predetermined material feeding torque at that speed.

In addition, when driving the material conveying belt with a three-phase induction motor,
A load is applied to the motor, causing slippage between the rotating shaft and the magnetic field for one rotation. Therefore, even though the command speed is determined by the frequency, the actual motor rotation speed varies depending on the load applied to the motor. However, if the material feeding speed does not necessarily need to be accurate, the frequency may be set in advance by assuming the amount of slippage empirically.

In addition, in order to accurately specify the material feeding speed, the number of rotations of the motor may be detected using an encoder or the like, and the frequency may be corrected by feeding it back to the central control unit CPU.

Under the control of the three-phase induction motor, the workpiece is fed forward at a predetermined speed and feeding torque while being applied cutting pressure by the feeding frame, and its negative side is cut by the cutting blade. Ru. After the normal feeding is completed, the material feeding frame is slightly retracted to a position where reverse feeding pressure can be applied to the workpiece, and the workpiece is fed backward by the reverse drive of the motor.

<Example> An embodiment of the invention will be described with reference to the accompanying drawings.

FIG. 1.2 shows an example of a vertical slicer, in which reference numeral 1 denotes a base, and a material feeding frame 3 is supported at an upper position by a support 2 erected on one side of the base. A vertical feed screw 7.7 is screwed into the material feeding frame 3. As shown in FIG. 1, the rotary shaft 10 disposed at lJi is connected to the feed screws 7, 7 by a bevel gear, and the rotary shaft 10 and the elevating motor M+ (approaching motor) are connected by a checker 7.
By connecting the feed screws 7, 7 with the rotation of the lifting motor Ms, the feed screws 7, 7 are reversibly rotated, and the material feed frame 3 is raised and lowered. Further, a slit plate 11 is fitted onto the drive shaft of the lifting motor Ml, and an encoder E1 is arranged on the outer periphery of the slit plate 11. The encoder E1 is connected to various counters and has a function of sending a signal to each counter each time the encoder passes through the slit of the slit plate 11.

The material feeding frame 3 supports front and rear a driving roll 4 and a driven roll 5 which are belt-driven by a reversible material feeding motor M2 consisting of a three-phase induction motor, and an endless material feeding belt 6 is wrapped around the rolls. At the same time, an air cylinder is installed inside the material conveying belt 6.

A large number of pressure rolls 9 are provided which are urged downward by bullets 8 such as springs.

A rear part 5i13, on which a cutting blade 12 is attached at an angle with respect to the traveling direction of the workpiece W, is fixed on the base 1, and a movable stage 15. Front surface plate 2 via intervening stand 18
5 is arranged. A blade opening 24 is provided in front of the cutting blade 12 on the constant m25 and inclined at the same angle as the cutting blade 12, and by rotating the handle of the screw rod 19 (see FIG. 2), the intervening The table 18 is moved back and forth on the movable table 15, and the surface plate 25 is raised and lowered to raise and lower the cutting edge 24 relative to the cutting blade 12.

One of the front parts of the suppression roll 9 is a detection roller 9a, and as shown in FIG. 3, a lifting shaft 31 whose lower end is fixed to a shaft support piece 30 projects upward from a support plate 32, and a nut is attached to a screw at the upper end of the lifting shaft 31. 33 and a flanged nut 34 (contact end) are successively hinged, and a spring 35 is sealed between the shaft support piece 30 and the support plate 32, and the elasticity of the spring 35 urges the detection roller 9a toward the material feeding path. and is inscribed in the endless material feeding belt 6, and a detector LS+ is provided below the flanged nut 34.

The detector LS+ and the flanged nut 34 are in engagement contact in the normal state, and the detector LSI is in the on state (non-detection state) shown by the solid line in Figure 3 (blue), and as will be described later. The material feeding frame 3 descends to apply cutting pressure to the workpiece W at the supply position, and the detection roller 9a rises by the distance S due to the reaction force caused by contact with the workpiece W Jz surface. In other words, in this configuration, the workpiece is detected by turning off the detector LS+. Further, one of the rear portions of the suppression rolls 9 is also a detection roller 9b having the same configuration as described above, and a detector LSz that is activated by coming into contact with and separating from the flanged napft 34 is disposed above the detection roller 9b.

Next, main parts of the present invention will be explained.

As shown in FIG. 4, the central control unit CPU includes key input means K, ROM (first memory) and RAM.
(second storage device) is connected. Further, an output control device I is connected to the output side thereof.

In this ROM, as shown in Fig. 55, a plurality of output voltage-frequency primary characteristic functions having different slopes are set in advance, and the function is selected by specifying a specified value α.

The output voltage-frequency linear characteristic function includes a function in which the output voltage remains constant even if the frequency fluctuates, as shown in FIG. 6, and this rA number is selected by specifying the specified value β. .

The specified values α and β can be specified simultaneously, and by this simultaneous specification, a function as shown in FIG. 7 is formed. In other words, by selecting α, the output voltage −
The slope of the linear characteristic function of frequency can be specified, and β
By specifying , the minimum output voltage (torque) can be guaranteed.

In addition, the RAM contains function designation values α and β for forward and reverse feeding, and designated material feeding speed V, respectively, in relation to the material feeding pattern corresponding to the thickness, material, etc. of the workpiece. A plurality of combined material feeding patterns are written, and information on the pattern can be read by specifying the pattern number P using the key input means.

With this material feeding pattern, the material feeding speed is made faster and the material feeding torque is reduced during reverse feeding compared to normal feeding, thereby reducing the grinding time per cycle and reducing fuel consumption. The data is selected in such a way as to improve profitability.

Then, the aforementioned central control unit CPU drives each reversible material motor M2 for forward feeding and reverse feeding using the read information from the RAM and the primary characteristic function of output voltage and frequency written in the ROM. The output voltage and frequency to be used are set.

The frequency designation and drive voltage designation from the central control unit CPU are input to the output side controller, and the output side 2Ji
The frequency and driving voltage are generated from the equipment and sent to the reversible material feeding motor M2, which drives and rotates the material at a predetermined material feeding speed and material feeding torque.

In addition, an encoder E2 is disposed on the drive shaft of the +iJ reverse feed material motor M2 in order to match the actual material feed speed and the designated material feed speed V. The rotational speed is detected and the frequency of the primary characteristic function set by the specified values α and β is corrected.

Next, the operation of the slicer having the above configuration will be explained.

After the pattern number P is set by the key input means K, the following steps are executed.

1) Place the workpiece W on the front upper surface of the cutting pressure application surface plate 25 and press the start button (not shown). As a result, the lifting motor Ml descends and the material feeding frame 3 descends. arise. Due to this descent, the lower surface of the endless material conveying belt 6 comes into contact with the upper surface of the workpiece W, and when it further descends and exceeds the stroke of the contact/separation distance S, the flanged nut 34 releases the lock on the detector LSI and turns it off. situation(
detection state).

Encoder E again! The number of passes through the slit of the slit plate 11 corresponding to the amount of movement of the drive shaft of the A-lowering motor Ml is counted by the signal generated from the A-lowering motor Ml, and when the set number is counted, the driving of the lifting motor Ml is released, and its descent is stopped. At the stop position, the material conveying belt 6 comes into pressure contact with the workpiece W to apply optimum cutting pressure.

2) Normal feed of the workpiece W When the material feed frame 3 stops descending, the feed material pan designated by the pattern number P is controlled by inputting the frequency and drive voltage from the output control device based on the normal feed information. The reversible material motor M2 is driven.

Then, the reversible feed material motor M2 is driven to forward feed, and the workpiece W is forwardly fed by the running of the endless feed belt 6, and the workpiece W
The lower surface of the veneer is cut vertically by the cutting blade 12, and the veneer is discharged downward.

3) Normal feed stop of workpiece W When the workpiece W is fed normally, the detection roller 9 is detected by the front end of the workpiece W.
b rises, the detector LS2 releases its engagement with the flanged nut 34, and turns it into an OFF state (detection state).Furthermore, when the rear end of the workpiece W passes and the detector LSz returns to ON, the reversible feed starts. The drive of the material motor M2 is stopped, and the workpiece W stops traveling.

4) Lifting of the material feeding frame 3 and its stop As the reversible material feeding motor M2 stops driving, the lifting motor M1 is driven upward, causing the material feeding frame 3 to rise, and the cutting pressure on the workpiece W is released. be done.

At the same time as the lifting motor Ml is driven, the encoder El counts the number of slits in the slit plate 11 corresponding to the amount of movement of the drive shaft of the lifting motor M1, and when the predetermined count is completed, the driving of the lifting motor MI is stopped and the feed is stopped. The timber frame 3 stops rising. At this stop position, the workpiece W
The optimum material feeding pressure is applied by the material feeding belt 6.

5) When the reverse feed material frame 3 of the workpiece W stops rising, the reversible material motor M2 is reversely driven based on the reverse feed information of the specified material feed pattern (by inputting the frequency and drive voltage from the output control device). do. Therefore, the endless material transport belt 6 runs in the opposite direction, causing the workpiece W to be transported in the opposite direction. Then, the workpiece W is controlled by timer control, etc.
will return to the feeding position.

6) Lowering of the material feeding frame 3 When the aforementioned reversible material feeding motor M2 stops driving, the lifting motor Ml is driven, and the material feeding frame 3 is lowered by a predetermined amount.
Appropriate cutting pressure is applied to the workpiece W.

Thereafter, each step is repeated, the workpiece W moves back and forth, and a veneer of a predetermined thickness is cut with each reciprocation.

The rotational speed of the workpiece W by the reversible material motor M2 is detected by the encoder E2 provided on the drive shaft of the reversible material motor M2, and the rotational speed is detected by the central controller C.
It is fed back to the PU and adjusted to a predetermined speed.

By controlling this reversible feed material motor M2, the workpiece W travels at a feeding speed and torque that are optimal for the material of the workpiece W, cutting thickness, etc., and a good cutting allowance can be obtained.

The above embodiment is adapted to a slicer in which the material feeding frame 3 is placed at the upper part of the material feeding frame 3. Of course, the present invention can also be applied to a slicer in which surface plates 13.25 are arranged oppositely in the front and rear.

Effect> As described above, the present invention allows the feeding speed and feeding torque of the workpiece W to be controlled by specifying the feeding turn, and even at low speeds, Since the torque can be maintained, it has the excellent effect of easily performing grinding under optimal conditions.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view of the vertical thrust slicer, FIG. 2 is a partially cutaway side view of the same, FIG. 3 is a side view of the detection roller 9a, and FIG. 4 is a side view of the detection roller 9a. is a block diagram, and FIGS. 5 to 7 are characteristic diagrams showing linear characteristic functions of output voltage and frequency. 3; Material feeding frame 6: Endless material feeding bell) 13.25: Surface plate Ml; Lifting motor Mz; ? IT reverse feed reverse feed - motor PU, central control unit K; key person car F stage
I; Output control device ROM, RAM, storage device

Claims (1)

[Claims] A surface plate equipped with a cutting blade and a material feeding frame equipped with a reversible material feeding belt are arranged opposite to each other with a material feeding path therebetween, and the material feeding frame is moved toward and away from the surface plate, The material feeding belt is brought into pressure contact with the workpiece, and cutting pressure is applied to the workpiece during forward feeding.
A vertical slicer for woodworking that applies reverse feed pressure during reverse feed has a three-phase induction motor for running the reversible material belt, a key input means, and an output voltage specified by the specified function value. A first memory device in which a plurality of primary characteristic functions with different slopes are preset, which determine the relationship between and,
A second storage device into which the command speed is input, and a function designation value and command speed are read from the second storage device based on the pattern designation from the key input means, and the read information and the command speed are stored in the first storage device. A central control unit CPU that determines the frequency and output voltage based on information; and an output control unit that generates the frequency and output voltage based on the frequency and output voltage specifications from the central control unit CPU and inputs them to the three-phase induction motor. A vertical slicer for woodworking characterized by being equipped with a device.