JPH06238602A - Super-finishing wood planing machine for reciprocating cutting type woodworking - Google Patents

Abstract

PURPOSE:To shorten a stand-by time of a work timber without generating defective feed of the timber which occurs with cutting of the work timber so as to carry out efficient cutting by providing a drive control means for setting a predetermined notching quantity and reversing the driving direction of a reversible timber feeding motor so as to restart to feed the timber. CONSTITUTION:At a timber feed table 2 in front and back positions of a plane blade in a timber feed passage for work timber, switches LS1, LS2 for detecting the back end of the work timber in the running direction and a timer T which operates with a detection of passing of the work timber detected by these switches are provided. With time digestion of the timber T, a reversible timber feed device 7 is stopped, and a predetermined cutting quantity Cn is subtracted from a predetermined notching quantity C. When the predetermined notching quantity C>0, the driving direction of a reversible timber feeding motor M1 is reversed and feeding of the timber is restarted. There is provided a drive control means which goes down by a height nearly equivalent to the predetermined notching quantity when the predetermined notching quantity C<0 and reverses the driving direction of the reversible timber feeding motor M1 after the notching quantity C is set, so as to restart feeding the timber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating cutting type super finishing plane for woodworking, which is provided with a reversible material feeding device and a feeding material guide surface provided with a plane blade so as to be relatively movable.

[0002]

2. Description of the Related Art Various reciprocating cutting type super finishing planes for woodwork have been proposed in which a reversible material feeding apparatus and a material feeding table provided with a plane blade are provided so as to be relatively movable.

[0003]

In this super finishing plane for woodworking, the work material is cut in the forward stroke and the backward stroke of the work material so that the work material is cut twice in one reciprocating stroke, A predetermined cutting amount is obtained by repeating this reciprocating process several times.

By the way, this type of reciprocating cutting type super finishing plane for woodwork is generally used to cut a material by arbitrarily setting the number of times of reciprocating the material as disclosed in Japanese Utility Model Publication No. 58-74504. However, there is a problem in that the reversible material feeding device lacks the stepping pressure on the material in response to the reduction in the material thickness that accompanies this continuous cutting, resulting in material feeding failure. .

On the other hand, in order to solve such a problem, a structure may be proposed in which the reversible material feeding device is mechanically moved up and down for each stroke, but the waiting time of the work material is long and therefore the cutting efficiency is increased. There was a problem that it was bad. The present invention aims to eliminate the problems of the conventional configuration.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the front end of a plane blade of a feed path for a work material and the rearward position of the work blade are respectively arranged on the feed table side to detect the rear end in the traveling direction of the work material. The detection switches LS ₁ and LS ₂ and the detection switches LS ₁ and LS ₂
A timer T that is activated by detecting the passage of the rear end in the traveling direction of the processed material by, and the time feeding of the timer T, the material feeding of the reversible material feeding device is stopped, and from the predetermined cutting amount C,
The predetermined cutting amount c _n is subtracted, and when the predetermined cutting amount C> 0, the driving direction of the reversible material feeding motor is reversed without restarting the reversible material feeding device to restart feeding, and the predetermined cutting amount C ≦ In the case of 0, the reversible material feeding device is lowered by a height substantially corresponding to the predetermined cutting amount, and the predetermined cutting amount C is set again, and then the driving direction of the reversible material feeding motor is reversed to feed the material. It is a reciprocating cutting type super finishing plane for woodworking, characterized in that it is provided with drive control means having control contents for restarting.

[0007]

A predetermined reciprocal cutting amount c _n is subtracted from the predetermined cutting amount C for each forward and backward strokes of the processed material, and when the cutting amount C is consumed by the subtraction, a reversible material feeding device is provided. By lowering, the feeding interval is lowered by a height substantially corresponding to the predetermined cutting amount. For this reason, the reversible material feeding device moves in each of a plurality of reciprocating strokes, which significantly reduces the waiting time of the processed material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 5 show an example of a super finishing plane for woodworking to which the present invention is applied. On a base 1, a material feeding table 2 whose upper surface is a material feeding guide surface 2a is provided. . A rotary table 3 on which knife stocks 4a and 4b are mounted is provided in the central portion of the material feeding table 2, and a gouge blade 5a and a reciprocating blade 5b supported by the knife stocks 4a and 4b, respectively.
The leading end (see FIG. 5) is made to project toward the material feeding guide surface 2a by the elevation control means. This elevating control means is composed of drive motors M3, M4 and the like. When the knife stock 4a is tilted by the drive motor M3 and the knife stock 4b is tilted by the drive motor M4, the work piece is fed forward, the forward blade 5a. The tip of the retreat blade 5b protrudes from the material-feeding guide surface 2a, and the retracting blade 5b is retracted downward to allow the workpiece to run backward, the tip of the retreating blade 5b protrudes from the material-feeding guide surface 2a, and The blade 5a is retracted downward.

A reversible material feeding device 7 is provided on the material feeding table 2.
, But is opposed to the base 1 via the material feeding passage. The reversible material feeding device 7 includes a lifting motor M that drives the lifting screw 8 to rotate.
2 moves up and down along the guide columns 9, 9. The reversible material feeding device 7 is configured by supporting a drive roll 11 driven by a reversible material feeding motor M1 and a driven roll 12 in the front-back direction, and wrapping a material feeding belt 13 on the rolls 11 and 12. There is. Further, inside the lower traveling portion of the material feeding belt 13, treading rolls 14 urged downward by a spring or the like are provided in a row. Each of these members is hidden by the frame cover 16. In addition, an auxiliary table (not shown) is arranged on the inlet side and the outlet side of the material feeding table 2.

In order to make the material feeding interval of the reversible material feeding device 7 with respect to the material feeding table 2 optimal so as to give an appropriate material feeding pressure to the processed material, the inlet side of the reversible material feeding device 7 is provided. , A detection switch LS4 is provided. That is, inside the frame cover 16, there is provided an elevating and lowering operation piece 20 which is urged downward by a spring 21 which is interposed above. The lifting operation piece 20 is supported by a receiving plate 22 that covers the roller supported at the lower end thereof. The receiving plate 22 is rotatably supported by a support shaft 23, and is urged by a spring 24 in a direction to support the lifting operation piece 20. A detection switch LS4 is attached to the upper end of the lifting operation piece 20, and as the lifting operation piece 20 rises, the detection switch L4 is attached.
The detection end of S4 contacts the ceiling surface of the frame cover 16,
As a result, it is turned on.

On the other hand, the material feeding table 2 has a detection switch LS3 for detecting the supply of the processing material on the inlet side thereof.
The detection switches LS1 for reverse running control of the processed material are sequentially arranged adjacent to each other. Then, the detection switch LS1,
The LS3 is covered with actuating pieces 26 and 27, one end of which is pivotally supported and the other end of which is biased upward by a spring, and the curved edges of the actuating pieces 26 and 27 slightly project from the material-feeding guide surface 2a, respectively. Is supplied or passed, and the protruding edge is pushed downward,
The detection switches LS1 and LS3 are each turned on. Furthermore, a detection switch LS2 for controlling the forward feeding of the processed material is also arranged at the rear end of the material feeding passage. Similarly, the detection switch LS2 is pivotally supported at one end and is biased upward by the spring at the other end, and the operating piece 28 having the curved end projecting from the material-feeding guide surface 2a projects, and the projecting edge is caused by the traveling of the processed material. Is pushed downward so that the detection switch LS2 is turned on.

Further, a slit plate s is fixed to the drive shaft of an elevating motor M2 for elevating the reversible material feeding device 7, and an encoder e for detecting the number of passages of the slits is arranged. The drive amount of M2, that is, the amount of elevation of the reversible material feeding device 7 can be detected.

Further, this superfinishing plane is equipped with a timer T for controlling the reversal position of the processed material and a central control unit CPU which constitutes drive control means for controlling the drive of each motor.

Next, the operation of the reciprocating cutting type super finishing plane for woodworking constructed as described above will be described with reference to the flow charts of FIGS. This series of operations is controlled by the central control unit CPU.

First, the processed material is supplied onto the material feeding table 2. At this time, if the plate thickness of the processed material is thick, the tip of the plate tilts the receiving plate 22, pushes up the lifting operation piece 20, and the detection switch LS4 is turned on. As a result, the elevating motor M2 is driven, and the reversible material feeding device 7 rises, which causes the detection switch LS4 to turn off again. As a result, a timer (not shown) is activated to stop rising after t ₁ seconds from the off operation. This series of operations is
Before performing the next positioning operation of the reversible material feeding device 7, the material feeding passage is widened with respect to the plate thickness of the processed material, and the time of t ₁ second is surely set by the detection switch LS4. It is set to secure the off position. Therefore, when the material feeding passage is wider than the plate thickness of the processed material from the beginning (when the detection switch LS4 is not turned on by the supply of the processed material), such operation is omitted and the process directly proceeds to step.

Then, after the provisional position of the reversible material feeding device 7 is set, further working material is fed (step).
Then, the operating piece 26 is pressed below the material feeding guide surface 2a, and the detection switch LS3 is turned on. When the detection switch LS3 is turned on, the reversible material feeding device 7 is once excessively lowered and then lifted again to perform positioning in order to remove the influence of inertia caused by the lowering of the reversible material feeding device 7. .

More specifically, the detection switch LS3
Is turned on, the lifting motor M2 is reversely driven to lower the reversible material feeding device 7, and the detection switch LS4 is turned on (step). Then, with this ON position as the origin, it descends until t ₂ seconds elapse. The amount of descent from the origin position is detected by the encoder e connected to the lifting motor M2. Then, after confirming the lifting amount H, the lifting motor M2 is driven in the forward direction to raise the reversible material feeding device 7. Then, the ascending / descending amount H is consumed, and further ascending / descending amount H ₀
Then, the lift motor M2 is stopped. As a result, the reversible material feeding device 7 is positioned. In this operation, the time t ₂ is an appropriately determined time within a reasonable range. With the lapse of this time, the reading is reversed to read the actual amount of decrease H, which is then digested, and the amount of increase / decrease H _{0 is} increased. Therefore, only the amount of increase / decrease H ₀ is significant. It will be.

The ascending / descending amount H ₀ is determined in advance and corresponds to a cutting amount C ₀ described later. That is, if the lift amount H ₀ changes, the cut amount C ₀ also changes. In this way, the reversible material feeding device 7 is once lowered, then inverted and raised again to remove the influence of the inertial amount generated by the influence of its own weight at the time of processing, so that the upper surface of the processed material is always irrelevant regardless of the thickness of the processed material. The position of the reversible material feeding device 7 with respect to can be fixed.

By the positioning of the reversible material feeding device 7, the value of the depth of cut C ₀ , which is input in advance, 0.5 mm, the number of times of cutting N, the amount of post cutting c ₁ , and the amount of front cutting c ₂ are read (step). The depth of cut C ₀ is a value input corresponding to the amount of elevation H ₀ , and the number of cutting times N is a value input in consideration of the achieved cutting thickness of the processed material. Further, in the first reciprocating stroke of the processed material, the post-cutting amount c ₁ is determined by the outgoing plane blade 5a.
Reference numeral ₂ is an estimate of the amount of cutting by the reciprocating blade 5b in the first reciprocating stroke of the processed material. Therefore, these values can be changed according to various conditions. At the same time as this reading, n representing the number of round trips is set to 1, and the depth of cut C is set to the depth of cut C ₀ .

Then, the reversible feeding motor M1 is driven,
The reversible material feeding device 7 is driven in the forward feeding direction, and the working material is fed forward by the driving. The height positions of the outgoing plane blade 5a and the horizontal plane blade 5b at this time are the positions where the horizontal plane blade 5a projects from the material feeding guide surface 2a and the horizontal plane blade 5b retracts downward. With the advance of this processed material,
The detection switch LS1 is turned on, and is returned to off with the passage of the rear end of the processed material, and the timer T is activated by this return from off. Then, the lower surface of the processed material is cut by the outgoing plane blade 5a, and after the rear end thereof passes over the outgoing plane blade 5a, the set time limit of the timer T is exhausted.

With this passage, c _n = {1- (n-1)
0.05} and c _1, further and depth of cut C = C-c _n (step). Here, c _n represents the cutting amount at the n round trip times. Therefore, depth of cut C, minus the amount of cutting c _n becomes the new value.

Here, the expression {1- (n-1) 0.05} c ₁
Is a preset formula in view of the fact that the material feeding pressure decreases with reciprocating cutting, and therefore the cutting amount in one forward stroke decreases. According to this formula, the amount of cutting performed by the first plane blade 5a is 0.100 mm (= c ₁ ), 0.095 mm for the second time and 0.090 mm for the third time. These values are only for the forward stroke, and are set separately for the backward stroke as will be described later.

After such calculation, the knife stock 4a,
4b is tilted by the drive motors M3, M4, and the reciprocating blade 5b
The tip of the sheet feeding guide surface 2a and the retracting blade 5a is retracted downward.

When the cutting depth C≤0, the process proceeds to the next step. When the depth of cut C> 0, the process goes to the return stroke (B). In this return stroke, the reversible material feeding motor M1 starts the backward feeding drive as the set time of the timer T is exhausted. Then, the number of times of reciprocation n is compared with the number of times of cutting N (step), and when n is less than the number of times of cutting N, n = n + 1 is set and the ON operation has already been performed with the advance of the processed material. The detection switch LS2 is returned to the off state, and the timer T is activated by the return from the off state. Then, the lower surface of the processed material is cut by the retreating blade 5b and the rear end thereof passes over the retreating blade 5b, after which the set time of the timer T is exhausted.

With this passage, c _n = {1- (n
-1) 0.05} c ₂ (step), and the depth of cut C
= A C-c _n, is obtained by subtracting the amount of cutting c _n as a new value.

Here, the above {1- (n-1) 0.05} c ₂
Is a preset formula in view of the fact that the material feeding pressure decreases with the backward stroke cutting, and therefore the cutting amount accompanying the supply of the working material decreases. According to this formula, the amount of cutting performed by the first retreating blade 5b is 0.080 mm (= c ₂ ), 0.076 mm for the second time and 0.072 mm for the third time. These are the numbers for the return stroke only.

After that, the tip of the outgoing plane blade 5a projects from the material feeding guide surface 2a, and the double plane blade 5b retracts downward.

When the cutting amount C ≦ 0, the process proceeds to the next step, and otherwise, the forward stroke (F) is executed again.

On the other hand, in the reciprocating stroke, when the cutting depth C becomes 0 or less, it means that the planned cutting amount in the state in which the feeding interval is constant is completed. Therefore, setting the cut amount C = C ₀ + C (step,), the elevating motor M2 is driven, and the elevating motor M2 is stopped based on the reading of a predetermined value by the encoder e. The reversible material feeding device 7 corresponding to C ₀ (= 0.5 mm) is lowered, and the process goes to the forward stroke (F) or the backward stroke (B). The reason why C = C ₀ + C is set here is to absorb the negative error in the previous stage. That is, when the cutting amount C = -0.013 in the previous step and the condition of the cutting amount C≤0 is satisfied, the cutting amount C = 0.5-0.013 = 0.487 is set in the next step. It was done. In consideration of the occurrence of the stop position error of the lifting motor M2, the cut amount C may be calculated by replacing the read value of the encoder e after the stop with the cut amount C ₀ .

As described above, the reversible material feeding device 7 reciprocally cuts the work material while maintaining its position until the predetermined cutting amount C is calculated and the cutting value is consumed. Then, the reversible material feeding device 7 descends by the height corresponding to the predetermined cutting value, and shifts to the reciprocating cutting process of the next stage.

After the stepwise cutting, when the number of cutting times N = n in the backward stroke (B), the front end of the processed material in the feeding direction (rear end of the processed material) is the detection switch LS3.
Is turned on and returned to off with the passage of the processed material, the reversible feeding motor M1 stops driving, the tip of the outgoing plane blade 5a protrudes from the feeding plane 2a, and the return plane blade 5b moves downward. After retreating to and preparing for the next time, the cutting of the processed material will be completed.

In the above-mentioned number of times designation, the total number of round trips is designated, but the number of stages may be designated. In this case, by specifying, for example, three steps, it becomes possible to specify cutting of approximately 3 × 0.5 = 1.5 mm.

[0034]

As described above, according to the present invention, the predetermined cutting amount c _n is subtracted from the predetermined cutting amount C for each of the forward stroke and the backward stroke,
When the predetermined cutting amount C is consumed by the reciprocating cutting, the process moves to the next stage, the reversible material feeding device 7 is lowered, and the predetermined cutting amount C
Since the reciprocating operation is performed while the reversible material feeding device 7 is stopped until the end of the above, the cutting processing is performed a predetermined number of times, and thus the material feeding pressure is reduced due to the cutting of the processing material. Unlike the configuration in which the reversible material feeding device 7 is always lowered for each reciprocal cutting, the feeding material has a short waiting time, and an excellent effect such as efficient cutting can be performed. is there.

[Brief description of drawings]

FIG. 1 is a conceptual view of a super finishing plane for woodworking according to the present invention.

FIG. 2 is a front view of a super finishing plane for woodwork according to the present invention.

FIG. 3 is a side view of the above.

FIG. 4 is a plan view of the above.

FIG. 5 is a vertical sectional side view of a part of the material feeding table 2.

FIG. 6 is a flowchart showing drive control.

FIG. 7 is a flowchart showing drive control.

FIG. 8 is a flowchart showing drive control.

[Explanation of symbols]

2 Okuzai table 5a往鉋blade 5b condensate planer blade 7 reversible Okuzai device LS1~LS4 detection switch M1 reversible Okuzai motor M2 elevation motor C depth of cut c _n amount of cutting

Claims (2)

[Claims] 1. A machining material for a superfinishing plane for woodwork, which comprises a reversible material feeding device driven by a reversible material feeding motor and a material feeding table provided with a plane blade so as to be movable relative to each other. Detection switches LS ₁ and LS ₂ which are respectively arranged on the front side of the plane blade and the rear side of the plane of the material feeding passage for detecting the trailing end of the processed material in the traveling direction, and the detection switch LS.
₁ and LS ₂ , a timer T which operates in response to detection of passage of the rear end of the processed material in the traveling direction, and when the timer T expires, the feeding of the reversible feeding device is stopped and a predetermined cutting amount C
From subtracts the predetermined amount of cutting c _n, reversible Okuzai motor M not to lift the reversible Okuzai device in the case of a predetermined depth of cut C> 0
Reversing the driving direction of 1 and restarting the feeding, the predetermined cutting amount C ≦ 0
In the case of, the reversible material feeding device is lowered by a height substantially corresponding to the predetermined cutting amount, and the predetermined cutting amount C is set again,
A reciprocating cutting type super finishing plane for woodworking, comprising: drive control means having a control content for reversing the driving direction of the reversible feeding motor M1 and restarting feeding. Of Okuzai passage inlet of 2. A workpiece, and the detection switch LS ₄ disposed reversible Okuzai apparatus further slightly behind the detection switch LS _4, disposed Okuzai table side In addition to the detection switch LS ₃ , the drive control means drives the lifting motor M2 of the reversible sheet feeding device when the detection switch LS ₃ detects the tip of the processed material with the insertion of the processed material into the feeding path. Then, the height position of the reversible sheet feeding device is set with the ON position of the detection switch LS ₄ as a reference, and the feeding of the reversing sheet feeding device is started by the setting of the position, and when the predetermined number of grindings is completed, the backward feeding of the processed material is performed. The reciprocating cutting type super finishing plane for woodworking according to claim 1, characterized in that it is provided with control contents for stopping the reverse feeding when the detection switch LS ₃ detects the rear end in the direction.