RU2478036C2 - Method of making grooves on ends of wood sheet materials - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to jointing the ends of wood sheet materials, particularly, to making mate grooves at said ends. Proposed method comprises, at least, driving the groove at end of said sheet material by rotary cutting tool. Note here that warped section of said end is leveled by clamping plate. This allows avoiding deep cutting and ensures equal size and shape grooves.

EFFECT: higher strength and reliability of joint.

4 cl, 25 dwg

Description

The invention relates to joining the ends of wood-based panels, in particular to forming uniform grooves on the ends of wood-based materials using rotary cutting tools and a presser foot designed to correct warpage at the end sections of said wood-based materials, in order to make them firm and reliable.

As a rule, longer wood-based panels are made by splicing the ends of wood-based panels such as plywood, LVL beams, veneers, wood-fiber boards, etc., using adhesives such as thermosetting adhesives, thermoplastic adhesives, etc.

At the same time, end-to-end splicing does not provide high bond strength due to the small areas of the joined ends of the wood-based panels. Therefore, end parts of wood-based wood materials are treated so that inclined surfaces are formed on them for joining “on the whisker” in order to increase the areas to be joined.

The end parts of the wood-based panels, treated in such a way as mentioned above, are interconnected with, for example, glue, then they are heated or cooled in order to accelerate the hardening of the glue.

A known method of forming grooves at the ends of sheet wood materials, with the aim of further increasing the connectable area of the end parts of sheet wood materials in the direction of their forward movement. In this case, grooves are formed on inclined surfaces of sheet wood materials.

That is, at the end portions of two wood-based panels to be joined, for example, V-grooves are formed along planes parallel to each other and inclined with respect to the front and back sides of said wood-based panels towards their end edges. In this case, each of the said V-shaped grooves extends towards their end edges and are located in the direction intersecting at right angles with the direction toward their end edges.

When forming said grooves along the end parts of two wood-based wood materials, the position of the grooves on one of the two wood-based wood materials is shifted relative to the grooves on the other by a distance equal to half the width of one groove, in a direction that intersects at right angles with the direction of the said end edges, with so that the said grooves are closely spliced. Because if the locations of the V-shaped grooves of the two wood-based panels are the same, then the vertices of the V-shaped grooves collide with each other, which does not lead to their tight splicing with each other.

The formation of grooves at the ends of the wood-based panels mentioned above is carried out in the following order:

As shown in FIG. 22, on the outer circumference of the rotary cutting tool 3, cutting edges of the teeth 3a are mounted, located at a certain distance in the direction of rotation and directed to the side intersecting at right angles with the direction of rotation, and they protrude to the sides opposite to each other, in order to ensure the separation of the teeth.

The node for forming the grooves 11 consists of numerous cutting tools 3 located in contact with each other in the direction of the axial line of the rotary shaft 2 and attached to it. In this case, the cutting edges of the teeth 3a are arranged in a spiral line indicated by the dot-dash line in Fig. 22.

The assembly for forming the grooves 11 is positioned in the standby position indicated by the solid line in Fig. 23 (A), and the rotary shaft 2 is rotated at high speed in standby mode.

In addition, the node for forming the grooves 11 has the ability to reciprocate between the position indicated by the solid line in Fig. 23 (A) and the position indicated by the dashed line, that is, along a predetermined path inclined at a certain angle (for example, at an angle θ = 10 degrees) relative to the surface of the sheet wood material 210.

In the position indicated in FIG. 23 (A), the wood-based material 210 is moved by means of the transport roll 220 along the support table 215 to the portion mentioned below (hereinafter referred to as the groove forming portion), then it is stopped and put into standby mode.

That is, when the assembly for forming the grooves 11 is moved down along the inclined path mentioned above, a groove is cut into a part of the wood-based panel material 210 along which the rotary cutting tool 3 extends. As a result, a grooved portion appears on the wood chipboard 210, which extends from the front side of the wood chipboard 210 to its reverse side.

At the same time, the above section, where the wood-based panel material 210 is stopped and brought into standby mode, is a groove forming section.

As shown in FIG. 24, numerous V-grooves 210a parallel to each other are formed in this way by cutting.

Meanwhile, the support table 215 shown in FIG. 23 (A) is made of a material such as synthetic resin, etc., with sufficient rigidity and hardness, but not able to damage the cutting edges of the teeth 3a of the cutting tools 3 when they collide with supporting table 215.

And the support table 215 is pre-cut into grooves as mentioned below.

That is, a sheet member with a predetermined thickness is fixed on a base not shown in the figure, thus, as shown in FIG. 23 (A). Subsequently, the assembly for forming the grooves 11 is moved obliquely down a path parallel to the aforementioned path so as to first slightly groove the groove along said sheet element.

Then, it is again moved obliquely downward from a more left start position than the start position of the aforementioned path, as seen in FIG. 23 (A), along a path parallel to the aforementioned path, so as to cut the groove deeper and completely along said sheet element.

This cutting process is repeated several times until such grooves 215a are formed, as shown in FIG. 25, and thereby form paths suitable for passing the assembly for forming grooves 11 when cutting grooves on wood-based wood material 210.

As a result, the support table 215 can support the wood-based panel material 215, with the exception of its chopped parts, when moving the assembly to form grooves 11.

As shown in FIG. 23 (A), grooving of another wood-based panel material connected to the wood-based panel material 210 is performed, for example, in the following order.

As shown in FIG. 23 (A), another sheet of wood material mentioned above is stopped in said groove forming section and moved in a direction intersecting at right angles with the direction of said end edges by a distance equal to half the thickness of the cutting tool 3 .

Then, by moving the assembly for forming the grooves 11, grooves are cut into said other wood-based panel material. After that, this other wood-based panel material is turned face down and, with glue, a part of it is cut with grooves and a part with grooves of wood-based material 210 is cut.

The disadvantage of the aforementioned method is that it is impossible to solve the following problems if there is a warped portion 210b indicated by a dash-dot line with two dots in FIG. 23 at the end portion of the wood-based sheet material 210 in the direction intersecting at right angles with the direction to its end edge. (A), as well as the solid line in Fig. 23 (B) (front view of the end part on the right side).

That is, if grooves are made on wood-based panel material 210 with such a warp, then too deep grooves are formed on the warped portion 210b when compared to normal-shaped grooves of wood-based panel material 210.

As a result, when connecting the cut grooves along the warped portion of the sheet wood material 210 to the normally cut grooves of another sheet wood material, gaps are formed between the surfaces of the cut grooves.

Therefore, if the mentioned surfaces are bonded to each other with glue, then a sufficient bond strength is not ensured, which leads to the separation of the connected parts from each other when exposed to force from the outside.

In the present invention, in order to form the numerous grooves mentioned above in a sequential order, rotary cutting tools, such as disk milling cutters, etc., are repeatedly moved along the end part of the sheet wood material.

The technical result of the invention is the alignment of the warped area on the end part of the sheet of wood material by pressing said end part to the support table by means of the presser foot, at least once the said rotary cutting tool is moved.

The solution to the problem posed in the claimed invention is achieved by the fact that at least once grooves are formed on the end part of said wood-based material by means of a rotary cutting tool, provided that the warped section on said end part is aligned with the presser foot. Due to this, too deep cutting is not performed, as a result of which grooves of the same size and shape are provided.

To familiarize with the best form of carrying out the invention, the following is a description of one main example embodiment of the invention with reference to the drawings, which depict:

Figure 1 - General view plan of the grooving machine in the main embodiment

Figure 2 is a side view of the machine for forming grooves along the dot-dash line AA from figure 1

Figure 3 is a side view of the machine for forming grooves along the dot-dash line BB from figure 1

Figure 4 - Front view of the node for forming grooves without the 1st lever 28 along the dash-dot line CC from figure 2

Figure 5 - Front view along the dash-dot line D-D of figure 3

6 - An enlarged perspective view of the support table

FIG. 7 is a partially enlarged view of the 1st presser foot 34 shown in FIG. 3 when pressed against a flat surface of a sheet of wood material 62

Fig. 8 is a perspective view of the 1st grooves 62a formed along the end portion of the wood-based panel material.

Fig. 9 is a perspective view of the 1st grooves 62a and the 2nd grooves 62c formed along the end portion of the wood-based sheet material.

Figure 10 is a partially enlarged view of the 1st presser foot 34 shown in figure 3, when pressed against the grooves 43a of the sheet of wood material 62

11 is a view in section of the presser foot along the dot-dash line EE of figure 10

12 is a side view of the grooving machine in an additional embodiment 1

Fig. 13 - (A): Partial sectional view along the dash-dotted line F-F of Fig. 12, (B): Partial sectional view along the dash-dotted line G-G of Fig. 12

Fig - perspective view of the design of the presser foot from the side indicated by the arrow in Fig.12

15 is a diagram of the actions of the main elements in the grooving machine in an additional embodiment 1

Fig - Scheme of the main elements in the machine for forming grooves in an additional embodiment 1

17 is a diagram of the actions of the main elements in the grooving machine in an additional embodiment 1

Fig. 18 is a schematic diagram of the actions of the main elements in the grooving machine in an additional embodiment 1.

Fig - Scheme of the main elements in the machine for forming grooves in an additional embodiment 1

Figure 20 is a schematic diagram of the actions of the main elements in the grooving machine in an additional embodiment 1

Fig - Scheme of the main elements in the machine for forming grooves in an additional embodiment 1

Fig. 22 is a partially enlarged sectional view of a node for forming grooves constructed in accordance with the known method.

Fig. 23 - (A): Diagram of the working processes of the assembly for forming grooves constructed by a known method,

(B): Facade view of the end of the wood particleboard 210 on the right side

24 is a plan of a sheet of wood material with grooves formed in its front and rear end sides.

Fig. 25 is an enlarged perspective view of the grooves formed by the known method.

Part number 3, shown by a dash-dot line with two dots in FIG. 1, is a cutting tool such as a disk mill and the like. In this case, the tool shown in Fig. 22 is used as the cutting tool.

As can be seen from figure 4, it has a thickness T in the 1st direction.

Between the cutting tools 3 along the rotary shaft 2 there are alternately spacer sleeves 4 having each width T equal to the thickness of one cutting tool 3 in the 1st direction, in an amount exceeding the total width of the wood-based panel material 62 mentioned below. All these elements are part of the node for forming the grooves 1, shown in figure 2.

Meanwhile, in this case, the cutting edges of the teeth 3a of all cutting tools 3 are located through the spacer sleeves 4 next to each other along a spiral line indicated by the dot-dash line in figure 4.

As shown in figures 1 and 2, both ends of the rotary shaft 2 are supported by 1 bearings 8 mounted on the supporting blocks 6, so that it rotates freely.

As shown in figure 2, on the lower sides of both supporting blocks 6 are fixed stands 7 with an internal thread, which includes screws with an external thread 10, located in an oblique direction (hereinafter referred to as - oblique direction).

Each stand 7 is positioned as described below. That is, they have a frame 9, the upper surface 9a of which is inclined parallel to the screw with an external thread 10, under each stand 7.

On each upper surface 9a, a stationary element 14b is arranged, which together with the movable element 14a is included in the 1st linear displacement bearing 14. In this case, both stationary elements 14b are parallel to each other in the manner shown in FIG. 1.

In addition, a movable element 14a moving along the stationary element 14b is attached to the lower side of the stand 7, whereby each stand 7 is moved in an inclined direction.

The left ends of both external threaded screws 10 shown in FIG. 2 are connected to the 1st servo motors 15, which are controlled by signals transmitted from the control device 70 mentioned below. By controlling the aforementioned servomotors, both screws with external thread 10 are driven in reciprocating motion and stop in synchronous mode.

With the translational movement of both screws with external thread 10, the node for forming the grooves 1 moves from the position (hereinafter referred to as the standby position) indicated by the solid line in Fig. 3 in the oblique direction to the position (hereinafter referred to as the front position) indicated by the dashed line on figure 3. And when they return the said node returns to the standby position.

Meanwhile, to the support unit 6 shown on the upper side of FIG. 1, a console 16 is projected that protrudes to the side. On the console 16, the 2nd servomotor 18 is fixed and connected to one of both ends of the rotary shaft 2 located on the upper side of FIG. Said servomotor 18 is controlled by signals transmitted from the control device 70 mentioned below so as to cause the rotary shaft 2 to rotate in the direction indicated by the arrow in FIG. 2 and stop.

Typically, the 2nd servomotor 18 is in a stopped state, but it is rotated in the direction indicated by the arrow in FIG. 2 by signals transmitted from the control device 70, before moving the assembly for forming the grooves 1 to form grooves on the sheet wood material 62, and after completion of its unilateral movement - to a halt.

In addition, the frame 9 along with the individual elements mentioned below are located on the 1st base 20.

As shown in FIG. 1, part number 22 is the 1st abutment wall located on the upper surface of the 1st base 20, with a height indicated by a dot-dash line with two points in FIG. 3. Both ends of the 1st bearing shaft 24 are attached to both 1st support walls 22.

On the 1st bearing shaft 24 are installed through the 2nd bearings 26 curved 1st levers 28 with the possibility of free rotation, located in positions opposite the spacer sleeves 4.

As shown in FIG. 1, part number 30 is a 2nd abutment wall attached at right angles to the 1st abutment wall 22.

The end of the piston rod 32a of the 1st pneumatic cylinder 32, the end portion of which is attached by a pin to the 2nd supporting wall 30, is also attached with a pin to the left end of the 1st lever 28 shown in FIG. 3.

In addition, to the right end of the 1st lever 28 shown in FIG. 3, a 1st presser foot 34 is attached, the width of which in the direction from left to right (hereinafter referred to as the 1st direction) shown in FIG. 5 is slightly smaller than the distance between two cutting tools 3 located after a certain distance next to each other. As a result, the 1st presser foot 34 moves freely relative to the 1st lever 28.

The bottom of the 1st presser foot 34 has two kinds of surfaces mentioned below.

As shown in FIG. 5, one of the two views is a flat bottom surface 34a for pressing against a flat surface of the wood panel material 62, where the 1st grooves 62a and the 2nd grooves 62c, mentioned below, have not yet been formed.

And the other is inclined surfaces 34b formed on both sides of the flat surface 34a, as shown in FIG.

As shown in FIG. 11, the inclined surfaces 34b are intended to be in full contact with the inner surfaces 62b of the 1st groove 62a while pressing the 1st presser foot 34 into the 1st groove 62a formed on the wood paneling 62.

Part number 36 shown in FIG. 3 is a weak tension spring connected to the 1st lever 28 and the 1st presser foot 34.

If the 1st presser foot 34 without said spring is installed only through the bearing on the 1st lever 28, then it is possible, for example, when the 1st lever 28 is turned, the 1st presser foot 34 is rotated around the bearing, resulting in the left part The 1st presser foot 34 in the 2nd direction is lowered and remains lowered.

In such a situation, as mentioned above, when the sheet wood material 62 is fed to the groove position, the sheet wood material 62 hits the presser foot 34 and can no longer move.

To avoid this phenomenon, a tension spring 36 is installed on the 1st lever 28 so that, at the 1st lifting position of the 1st lever 28, indicated by the solid line in FIG. 3, the tension spring 36 slightly lifts the left part of the 1st presser foot 34 with the aim of tilting it left up.

Meanwhile, FIG. 3 shows the state of the 1st pneumatic cylinder 32 when its piston rod 32a is pulled back, while when it is pulled out, the 1st presser foot 34 is pressed against a flat surface of the wood panel material 62 or the inner surfaces of the groove 62b.

Moreover, all the actions mentioned above are controlled by signals transmitted from the control device 70.

Part number 42 is a support table with flat surfaces on its front and back sides, used in the processing of sheet wood material 62 and made of steel.

The right end part of the support table 42 on its front side in the 2nd direction is cut in such a way as shown in Fig.3. In the place formed as a result of cutting, the shock absorber 43 is fixed for the cutting tool 3 from materials such as bakelite, hard synthetic resin, etc., possessing not only rigidity, but also properties that do not allow damage to the cutting edges of the teeth of cutting tools 3 when contact with said shock absorber.

As shown in figure 3, the 1st support table 42 is located above the 1st base 20 and has the ability to move in the 1st direction, intersecting at right angles with the feed direction of the sheet wood material 62 (hereinafter referred to as the 2nd direction) indicated by the arrow in FIG. 3.

On the upper surface of the 1st base 20, two height adjusters 44 are placed at a certain distance and fixed. At each height adjuster 44, a fixed member 46b is arranged, which, together with the movable member 46a, is included in the 2nd linear motion bearing 46, and the movable member 46a is fixed to the lower surface of the 1st support table 42.

The composition of the 1st support table 42 with the ability to move in the 1st direction includes the following elements.

Part number 48 is the 2nd pneumatic cylinder, which is partially shown by a solid line, and mainly by a dashed line in figure 1. And also it is shown in full dashed line in figure 2 and is presented in section in figure 3.

Its end portion is attached by a pin to the 1st support wall 22 of the frame 9, while the end of its piston rod 48a is attached by a pin to the 1st protrusion 20a, mounted on the lower surface of the 1st support table 42.

In such a composition, as mentioned above, the 1st support table 42 moves in the 1st direction when the piston rod 48a of the 2nd pneumatic cylinder 48 extends and retracts.

At the same time, two stoppers of a known type are arranged for stopping the 1st support table 42 in a predetermined waiting position (hereinafter referred to as the 1st position), remote at a distance T in the 1st direction and shown on the lower side of Figure 1, when retracting the piston rod 48a, as well as in the predetermined standby position (hereinafter referred to as the 2nd position) shown on the upper side of FIG. 1, when the piston rod 48a is extended.

Moreover, the actions of the 2nd pneumatic cylinder 48 are controlled by signals transmitted from the control device 70.

Part number 50 shown in FIG. 3 is a sharp-pointed stop.

The limiter 50 is located as mentioned below.

Part number 52, shown by the solid line in FIG. 1, and in FIG. 3 by a dash-dot line, represents the 3rd support walls, each located vertically on the upper surface of the 1st support table 42 in the 1st direction, i.e. its both ends in the direction from top to bottom in figure 1.

Both ends of the 2nd bearing shaft 54 are attached to both 3rd support walls 52.

On the left side of FIG. 3, there is a 4th support wall 55 attached by both ends located in a top-down direction of FIG. 1 to both 3rd support walls 52.

The second levers 58 with the possibility of rotation, at the lower ends of which there are stops 50, are located after a certain distance in the direction from top to bottom, shown in figure 1, on the 2nd bearing shaft 54 together with the bearings 56.

As shown in FIG. 3, the upper ends of the 2 levers 58 are connected by pins to the ends of the piston rods 60a of the 3 pneumatic cylinders 60, the ends of which are connected by pins to the 4th supporting wall 55.

When extending and retracting 3 pneumatic cylinders 60, the 2nd levers 58 rotate within the area between the position indicated by the solid line in FIG. 3 (hereinafter referred to as the 2nd lifting position) and the position indicated by the dash-dot line with two points in FIG. .3 (hereinafter referred to as the “sticking position”), where the ends of the stoppers 50 are stuck into the surface of the sheet wood material 62 in order to limit its displacement by clamping it between the stoppers 50 and the first support table 42.

However, the sticking position is not constant for the following reasons. The stops 50 are intended to prevent the displacement of the wood-based panel material 62 due to the force arising from the formation of grooves on the wood-based panel material 62 by means of cutting tools 3 by sticking the ends of the limiters 50 into the surface of the wood-based panel material 62.

Therefore, the sticking force caused by the 3rd pneumatic cylinder 60 changes at an appropriate time in order to completely prevent the displacement of the wood-based panel material 62.

When turning the 2nd lever 58, the actual position of the sticking of the limiter 50 changes depending on the force caused by the 3rd pneumatic cylinder 60, the properties of the sheet wood material 62, etc.

The actions of the 3rd pneumatic cylinder 60 are controlled by signals transmitted from the control device 70.

Part number 62, shown by a dash-dot line with two points in FIG. 1, a is a solid line in FIG. 3, is a sheet of wood material, where the 1st grooves 62a and the 2nd grooves 62c are formed by means of cutting tools 3, as mentioned below.

As shown in FIGS. 1 and 3, part number 64 is a transport roll intended for transporting sheet wood material 62 on the 1st support table 42. In FIGS. 1 and 3, only one transport roll 64 is shown, but in practice there are many transport rolls. rolls 64 are in place.

The transport roll 64 is driven into rotation and stopped by a third servomotor 66.

Part number 68 is a sensor for detecting the front end of the wood-based panel material 62 and transmitting the detection signal to the control device 70.

The control device 70 after receiving a detection signal from the sensor 68 transmits control signals to individual operating elements.

In such a composition, as mentioned above, pre-formed grooves on the 1st support table 42.

That is, the first support table 42 is first attached without grooves, the shape of the upper corner on the right edge of which is shown by a dash-dot line with two points in FIG. 3, to the 2nd linear displacement bearing 46.

In such a situation, as mentioned above, the 2nd pneumatic cylinder 48 is pulled back so as to move the 1st support table 42 to the 1st position and put it into standby mode.

Then, the 2nd servomotor 18 is rotated so as to rotate the cutting tools 3 in the direction of the arrow indicated in FIG. 3. After that, a screw with an external thread 10 is brought into translational motion by means of a 1st servomotor 15 so as to move the assembly for forming the grooves 1 to the front position, as shown in FIG.

And after stopping the 2nd servomotor 18, the 1st servomotor 15 is driven back and thereby rotate the screw with the external thread 10 in order to move the assembly for forming the grooves 1 to the standby position.

After the process mentioned above, the 2nd pneumatic cylinder 48 is pushed forward in order to move the 1st support table 42 to the 2nd position and put it into standby mode.

Also, as mentioned above, rotating the cutting tools 3 in the direction of the arrow indicated in FIG. 3 moves the assembly for forming the grooves 1 to the front position shown in FIG. 3.

As a result, as shown in FIG. 6 with a perspective view, many V-grooves 43a are formed on the support table 42, consisting of two inclined inner surfaces 43b and spaced apart by a distance T in the 1st direction, as well as corresponding to each shape of the cutting edge tooth cutting tool 3.

Now we explain the sequence of actions of individual work items in the main implementation example.

Separate work elements are pre-positioned as reference positions as mentioned below.

That is, the piston rod 32a of the 1st pneumatic cylinder 32 is pulled back so as to move the 1st lever 28 to the 1st lifting position shown by the solid line in FIG. 3.

Also, the 3rd pneumatic cylinder 60 is pushed forward so as to move the 2nd lever 58 to the 2nd lifting position shown by the solid line in FIG. 3.

The 2nd pneumatic cylinder 48 is pulled back so as to move the 1st support table 42 through the 2nd linear motion bearing 46 to the 1st position.

The transport roll 64 is brought into rotation in the direction of the arrow indicated in FIG. 3 by means of a third servomotor 66.

In such a situation, as mentioned above, a sheet of wood material 62 is placed on the transport roll 64 and transported in the 2nd direction.

When the front end of the wood panel material 62 transported to the right side (FIG. 3) is detected by the sensor 68, the detection signal from the sensor 68 is transmitted to the control device 70.

Then, the control device 70 gives a stop signal, first of all, to the 3rd servomotor 66 in order to stop the transport roller 64 when the front end of the wood-based panel material 62 slightly extends beyond the left boundary of the section with grooves 43a formed on the 1st support table 42, when viewed from the front of FIG.

The control device 70 generates signals in order to push forward the piston rods 32a of the 1st pneumatic cylinders 32, and also to retract the 3rd pneumatic cylinders 60.

Under the action of the 1st pneumatic cylinders 32, each of the 1st levers 28 is rotated in a clockwise direction from the position shown in FIG. 3.

As a result, as shown in FIG. 7 is an enlarged view, the flat surface 34a of the 1st presser foot 34 presses the wood panel material 62 against the 1st support table 42.

That is, even if a partial warpage of the sheet wood material 62 is present, it is corrected and the warped portion is leveled in the same manner as mentioned above.

And under the action of 3 pneumatic cylinders 60, each of the 2 levers 58 is rotated counterclockwise from the position shown by the solid line in figure 3.

As a result, the tips of the limiters 50 are stuck into the surface of the sheet wood material 62.

Then, the control device 70 provides a signal so as to drive the 2nd servomotor 18 to rotate the rotary shaft 2 of the assembly to form the grooves 1, that is, the cutting tools 3 in the direction indicated by the arrow in FIG.

After that, the control device 70 generates signals in order to actuate both of the first servomotors 15 in order to bring both screws with external thread 10 into translational motion in synchronous mode.

As a result, as shown in figure 3, the node for forming the grooves 1 is moved from the standby position to the front position.

When moving it, the front end part of the wood-based panel material 62 is subjected to cutting by means of cutting tools 3.

As shown in FIGS. 8 and 9, in each cutting section constituting a width of 2T of the wood panel material 62, 1 grooves 62a are formed, consisting of two inner surfaces 62b shown by oblique lines and having each width T in the 1st a direction and a V-shape in section in a direction intersecting at right angles with an oblique direction,

The 1st presser foot 34 is shown by a solid line on the upper side of FIG. 8, and only its flat surface 34a and the inclined surfaces 34b are shown by a dash-dot line with two points on the lower side of FIG. 8.

When machining by cutting tools 3, the 1st presser foot 34 is pressed down to the wood-based panel material 62.

The movement of the cutting tools 3 occurs unhindered, since the grooves 43a, previously formed on the 1st support table 42, are the space for the passage of the cutting tools 3.

In this case, the inner surfaces 62b of the 1st grooves 62a, formed in this way as mentioned above, and the inner surfaces 43b of the grooves 43 are parallel to each other and make up one solid surface.

When grooves 62a are formed, the front end portion of the wood-based sheet material 62 is aligned with the 1st presser foot 34 and clamped between the 1st presser foot 34 and the 1st support table 42, so that it does not move in any way from the predetermined position, resulting in almost uniform in size and shape, the first grooves 62a are provided.

In addition, the displacement of the wood-based panel material 62 is also prevented by means of stops 50.

In addition, the reverse side of the sheet of wood material 62, with the exception of its parts through which the cutting tool 3 passes, is supported on the 1st support table 42, so that the grooves of the first 62a are formed more correctly.

The control device 70, after sufficient time has passed for the formation of the first grooves 62a, provides a signal in order to actuate the individual operating elements.

That is, the piston rods 32a of the 1st pneumatic cylinders 32 are pulled back and thereby the first levers 28 are returned to the initial positions shown in FIG. 3.

Subsequently, the piston rod 48a of the 2nd pneumatic cylinder 48 is advanced in order to move the 1st support table 42 from the 1st position to the 2nd position by a distance T through the 2nd linear motion bearings 46.

At the same time, the 3 supporting walls 52 are moved together with the support table 42, as a result of which the wood-based material 62 into which the stops 60 are stuck, without changing its position relative to the 1st support table 42, moves together with the said support table 42.

After this movement, each of the 1st grooves 62a formed by the wood-based panel material 62 is directly below the 1st presser foot 34 as shown in FIG.

Then, the control device 70 generates a signal in order to advance the piston rods 32a of the 1st pneumatic cylinders 32.

As a result, the first levers 28 again rotate in a clockwise direction from the position shown in FIG. 3.

Therefore, the 1st presser legs 34 mounted on the 1st levers 28 are pressed against the 1st grooves 62a tilted downward as shown in FIG. 10.

Figure 9 shows the flat surface 34a and the inclined surfaces 34b of only one 1st presser foot 34 in a dash-dot line with two points, and also figure 11 shows the numerous 1st presser legs 34, the inclined surfaces 34b of which are pressed against the inner surfaces 62b included in the first grooves 62a, which leads to the pressing of the sheet wood material 62 to the 1st support table 42.

This means that even if there is a partial warping of the sheet wood material 62, then the warping is corrected and the warped part of the sheet wood material 62 is leveled.

After that, the control device 70 gives a signal in order to actuate the 2nd servomotor 18 in order to rotate the cutting tools 3 in the direction indicated by the arrow in figure 3.

Then, the control device 70 generates signals in order to actuate both of the 1st servomotors 15 with the aim of reverse rotation of both screws with external thread 10 in synchronous mode.

As a result, the node for forming the grooves 1 moves along the return path, that is, from the position indicated by the dashed line in Fig. 3 to the position indicated by the solid line in Fig. 3.

When it is moved, the front end of the wood-based panel material 62 is subjected to cutting by means of cutting tools 3. As shown in FIG. 9, a new 2nd grooves 62c are formed on the wood-based sheet material 62 between the already formed 1st grooves 62a located after a certain distance next to each other.

The following are additional examples of the invention:

Example 1:

In this example, the 1st presser foot 34 in the aforementioned main example also moves in the 2nd direction, which is the feed direction of the wood panel material 62.

And in this example, terms such as 1st direction, 2nd direction, feed direction, oblique direction, 1st position and 2nd position in the above main embodiment are used in the same sense.

12 is a side view of the grooving machine in this example.

Most of the part numbers used in the above main example are basically the same for this example.

In this case, for example, as in the aforementioned main embodiment, also screws with external thread 10 are used to move the assembly for forming grooves 1 in an oblique direction between the standby position and the front position, linear displacement bearings 14, 1st servo motors 15 and others, but in this case only an explanation of the actions of the mentioned elements is given without drawings.

As shown in FIG. 12, part number 80 is the 2nd support table located above the 1st base 82 and can be moved through the 2nd linear motion bearings 46 and others by means of the 2nd pneumatic cylinder 48 in the 1st direction on the portion between the 1st position and the 2nd position in the manner as mentioned in the above main embodiment.

On the 2nd support table 80, there are grooves 80a, such as grooves 43a, formed on the front end portion of the 1st support table 42 in the 2nd direction shown in the above main embodiment.

In contrast to the 1st support table 42, the left end part of the 2nd support table 80 in the 2nd direction is located on the left side than the left end part of the 1st support table 42.

Given the length of the 2nd support table 80, the 2nd base 82 is longer than the 1st base 20 shown in the main embodiment.

As shown in FIG. 12, the part numbers 50, 54 and 58, the same as in the aforementioned main embodiment, are limiters, a 3rd bearing shaft and 2nd levers, respectively. They are controlled by signals transmitted from the control device 120, and are driven in the same way as in the aforementioned main embodiment, while they are moved in the 1st direction along with the 2nd support table 80.

Part number 64 is a transport roll designed to feed the wood-based sheet material 64 to a predetermined position on the 2nd support table 80 and composed of parts similar to those mentioned in the above-mentioned basic embodiment, and also driven by signals transmitted from the device control 120, as described in the above basic embodiment.

Part number 84, indicated in part by the solid line in FIG. 12, and also shown without its lower part in FIG. 13 (A), is the 5th support wall. The lower parts of both 5th supporting walls 84 are attached to the upper surfaces of both edge parts of the 2nd base 82 located in the 1st direction, as well as the upper ends 84a of both 5th supporting walls 84 are extended in the 2nd direction, which is the direction from left to right in Fig. 12.

The stationary parts 86b of the 3 linear motion bearings 86, each consisting of the stationary part 86b and the moving part 86a, stretched in the 2nd direction, are attached to the upper surfaces of both 5th supporting walls 84.

Part number 88 is an installation block. On both edges of the mounting block 88, located in the 1st direction, there are protrusions 88a attached to both movable parts 86a of the 3 linear motion bearings 86 mounted on both 5th supporting walls 84.

Both protrusions 88a have through holes with internal threads 88b drilled in the 2nd direction.

Screws with an external thread 90 matching the internal thread 88b in the 2nd direction are inserted into said through holes.

The left end of the screw with an external thread 90, located in the 2nd direction, is attached to the 4th servo motor 92.

The 4th servomotor 92 drives the external screw 90 in a reciprocating rotation and stop by signals transmitted from the control device 120, whereby the 1st installation block 88 moves from left to right shown in FIG. 12 and stops at given place.

To the lower part of the 1st installation block 88, a third support element 94 is fastened protruding to the right side of the 2nd direction.

Near the edge of the 3rd support element 94, a bearing 96 is mounted, where the 3rd bearing shaft 100 is inserted, protruding from both lower ends of the 4th support element 98 in the 1st direction. As a result, the 4th support element 98 has the ability to rotate around the 3rd bearing shaft 100.

As shown only on one side in FIG. 12, in the space between the end face 88c of the 1st mounting block 88 and the end face 98c of the 4th supporting element 98 directed towards the 1st direction, the 4th pneumatic cylinder 102 is freely rotatable .

The end 102a of the 4th pneumatic cylinder 102 is attached through a bearing (not shown in FIG.) To the end face 88c, and also the end of the piston rod 102b to the end face 98c.

In addition, as mentioned below, with the piston rod 102b maximally extended, the flat surface 108a of the 2nd presser foot 108 becomes parallel to the inclined path of the assembly for forming the grooves 1.

Therefore, when extending and retracting the piston rod 102b of the 4th pneumatic cylinder 102, controlled by the signals transmitted from the control device 120, the 4th supporting element 98 rotates around the 3rd bearing shaft 100.

The 4th support element is provided with the following elements.

Part number 104 is the 4th linear motion bearing, the stationary part 104b of which is attached to the right surface of the 4th support member 98 directed towards the 2nd direction. In this case, the numerous stationary parts 104b are located across the distance T in the 1st direction.

As shown in FIGS. 12 and 13, each of the fixed parts 104b is mounted through the movable part 104a on the 5th support element 106. The 5th support element 106 has the ability to rise up and down relative to the 4th support element 98.

To the surface of the 5th support member 106, opposite the surface with the movable part 104a, a 3rd lever 107, shown as an L-shape in FIG. 12, as well as a dash-dot line with two points in FIG. 13 (a) is attached, the width of said 3rd lever 107 in the 1st direction is equal to the thickness of the 1st presser foot 34 shown in the aforementioned main embodiment.

As shown in FIG. 12, the 2nd presser foot 108 included in the 3rd lever 107 projects horizontally on the lower side of the 3rd lever 107.

Like the 1st presser foot 34, the structure of the bottom of the 2nd presser foot 108 consists of a flat surface 108a and inclined surfaces 108b, such as shown in FIG. 14 with an enlarged perspective view when viewed from the side of arrow H in FIG. 12 .

As shown in FIGS. 12 and 13, the 2nd mounting block 110 is attached to the upper surface of the 4th support member 98 located relative to the fixed portion 104b.

At the upper end of the 2nd installation block 110, an adapter 110a is secured with a 2nd protrusion 110b.

Part number 112 is the 5th pneumatic cylinder, the end 112b of which is connected to the protrusion 110b, and the end of the piston rod 112a is connected to the upper surface of the 5th supporting element 106.

In such an arrangement, as mentioned above, the piston rod 112a of the 5th pneumatic cylinder 112 extends or retracts according to the signals transmitted from the control device 120. As a result, the 3rd lever 107 rises or falls down.

Part number 62 is a wood-based panel material, as in the aforementioned main embodiment.

And also part number 64 is a transport roll with the possibility of rotation and stop by means of a third servomotor 66.

Part number 68 is a sensor for detecting the front end of the wood-based panel material and transmitting the detection signal to the control device 120.

The control device 120 receives signals from the sensor 68 and provides control signals to individual operating elements.

Part number 1 is a node for forming grooves in the composition of such elements as in the aforementioned main embodiment, with the possibility of movement in the area between the standby position and the front position. In this case, FIG. 12 shows only its waiting position indicated by a dash-dot line with two points.

Separate work elements are pre-positioned as reference positions as mentioned below.

That is, by means of the 4th servomotor 92, the 1st installation block 88 is moved to the position (hereinafter referred to as the initial position) indicated in FIG.

By means of the respective pneumatic cylinders, the 2nd lever 58, the 4th support element 98 and the 5th support element 106 are moved to the positions (hereinafter referred to as the initial positions) indicated in FIG. 12.

As in the aforementioned main embodiment, the assembly is also moved to form grooves 1 to the standby position.

In addition, by retracting the 2nd pneumatic cylinder 48, the 2nd supporting element 80 is moved to the 1st position.

By means of a third servomotor 66, the transport roll 64 is rotated in the direction of the arrow indicated in FIG. 12.

In such a situation, as mentioned above, on the transport roll 64, wood laminate 62 is transported in the 2nd direction. If the front end of the wood-based sheet material transported in the 2nd direction on the transport roll 64 is detected by the sensor 68, the detection signal from said sensor is transmitted to the control device 120.

Then, the control device 120 gives a stop signal, first of all, to the 3rd servomotor 66 in order to stop the transport roll 64 when the front end of the wood-based panel material 62 slightly extends beyond the left boundary of the section with grooves 81a formed on the 1st support table 80, when viewed from the front of FIG.

At the same time, the control device 120, after receiving the detection signal from the sensor 68, also gives a signal to the 2nd servomotor 18 in order to rotate the cutting tools 3 installed in the node for forming the grooves 1, as described in the aforementioned main embodiment .

Then, the control device 120, after sufficient time is necessary to stop the transport roll 64, gives a signal so that the 3rd pneumatic cylinder 60 is pulled back and thereby the 2nd lever 58 is turned in order to stick the sharp tip of the limiter 50 into the surface of the wood-based material 62 as shown in FIG.

And the control device 120 gives a signal to the 5th pneumatic cylinder 112 so as to lower the 3rd lever 107 and use its flat surface 108a to press the front end part of the sheet wood material 62 to the 2nd support table 80 in the manner shown in Fig.15.

Subsequently, both first servomotors 15 are driven in order to translate both screws with external thread 10 in synchronous operation.

As a result, the groove forming assembly 1 moves in the oblique direction indicated by the arrow in FIG. 16 from the standby position to the front position indicated by the dashed line in FIG. 16.

Simultaneously with the beginning of the movement of the assembly for forming the grooves 1, a screw with an external thread 90 is driven in motion by the 4th servomotor 92 so as to move the mounting block 88 in the 2nd direction indicated by the arrow in FIG. 16, while maintaining a certain distance from the assembly to form grooves 1 in the 2nd direction.

The 3rd lever 107, movable in the 2nd direction along with the 1st mounting unit 88, has a flat surface 108a and inclined surfaces 108b. As shown in FIG. 16, said surfaces are suitable in the 2nd direction to a more forward position than the groove forming unit 1.

Therefore, by means of the 2nd presser foot 108, the end portion of the sheet wood material 62 is preliminarily pressed against the 2nd support table 80 before the formation of grooves along said end portion of the wood sheet material 62 is started using the cutting tools 3 included in the assembly for forming the grooves 1 .

Meanwhile, by means of the 4th servomotor 92, the progressive movement of the screw 90 with the external thread is stopped in order to stop the movement of the 1st installation block 88 when the front end of the 2nd presser foot 108 reaches a slightly more forward position (hereinafter referred to as the 3rd position ) than the end portion of the sheet wood material 62, as shown in FIG.

While both of the 1st servomotors 15 continue to rotate and stop during the arrival of the node for forming grooves 1 to the position indicated by the dashed line in Fig. 16.

As a result, as mentioned above in the main embodiment, even if the warping of said end portion of the wood-based panel material 62 is present, it is corrected and thereby said end portion is leveled. That is, without warping, the processing of sheet wood material 62 by cutting tools 3.

As shown in FIG. 8 in the aforementioned main embodiment, in each cutting portion constituting a width of 2T of the wood panel material 62, 1st grooves 62a are formed having each width T in the 1st direction and V-shaped in section in a direction intersecting at right angles with an oblique direction.

Meanwhile, when moving the node for forming the grooves 1, each of the cutting tools 3 passes a section between the 3 levers 107 located at a certain distance next to each other, so the 3rd levers 107 do not interfere with the movement of the cutting tools 3.

In this case, the node for forming the grooves 1 is in the front position in standby mode.

The control device 120, after sufficient time has passed for the formation of the first grooves 62a, provides signals in order to actuate the individual operating elements as mentioned below.

That is, the piston rod 112a of the 5th pneumatic cylinder 112 is pulled back so as to raise the 3rd lever 107 to the position indicated in FIG. 17.

Subsequently, the piston rod 102b of the 4th pneumatic cylinder 102 is pulled forward as far as possible.

Then, the 4th support element 98 is rotated around the 3rd bearing shaft 100 so that the 4th support element 98 is inclined relative to the 1st mounting block 88 as shown in Fig. 18.

The individual elements are pre-adjusted so that the front end of the 2nd presser foot 108 does not run into the wood-based panel material 62, but even if this occurs, the wood-based panel material 62 does not move relative to the 1st mounting block 88 due to the limiters 50 are stuck into the surface of the sheet wood material 62.

And after the 3rd lever 107 returns to the position indicated in FIG. 17, the 2nd pneumatic cylinder 48 is advanced forward in order to move the 2nd support table 80 to a distance T to the 2nd position and put it into standby mode.

And with this movement, the wood-based panel material 62, without changing its position with respect to the second supporting element 80, moves with it, because the stops 50 are stuck into the surface of said sheet-metal material as described in the aforementioned main embodiment.

After that, with the help of the 4th servomotor 92, a screw 90 with an external thread 90 is driven in order to move the 1st installation block 88 to the position indicated in Fig. 19, that is, to the position (hereinafter referred to as the 4th position) where the 1st grooves 62a on the wood-based panel material 62 are directly below the 2nd presser legs 108.

Then, by pushing the 5th pneumatic cylinders 112 forward, the 3rd levers 107 are lowered so that, as shown in FIG. 20, the inclined surfaces 108b of the 2nd presser legs 108 are pressed against the 1st grooves 62a in the same manner as shown in 11 in the aforementioned main embodiment.

Therefore, if warping of the end portion of the wood panel material 62 is present, then it is corrected in the same manner as mentioned above, and said end portion is aligned.

Subsequently, the control device 120 gives a signal in order to actuate both of the 1st servomotors 15 and thereby bring back the two screws with external thread 10 in synchronous mode.

As a result, the groove forming assembly 1 moves from the front position shown by the dashed line in FIG. 21 to the standby position shown by the dash-dot line with two points.

When moving it, the front end of the wood-based panel material 62 is subjected to cutting by means of cutting tools 3. As shown in FIG. 9 in the aforementioned main embodiment, 2 are formed on the wood-based panel material 62 in a width of 2T, 2 the grooves 62c, each having a width T in the 1st direction and a V-shape in section, formed in a direction intersecting at right angles with an oblique direction.

That is, as in the aforementioned main embodiment, the first grooves 62a and the second grooves 62c of the same size and shape are formed on the front end portion of the wood panel material 62.

Meanwhile, when moving the node for forming the grooves 1, each of the cutting tools 3 passes a section between the 3 levers 107 located at a certain distance next to each other, so the 3 levers 107 do not interfere with the movement of the cutting tools 3.

When connecting two sheet wood materials, one of them is turned face down and with the help of glue they connect part of it with cut grooves and part with cut grooves of other sheet wood material.

The result is a strong and reliable connection of the ends of the sheet wood materials without gaps.

Example 2:

In the aforementioned embodiments, the first grooves 62a and the second grooves 62c are formed by a single translational-translational movement of the assembly to form the grooves 1, but in this example, the grooves are formed by the following method.

In this case, such a node is used for forming grooves, in which, for example, 3 spacer sleeves (three pcs.) 4 are located between each two cutting tools 3 on the rotary shaft 2.

As in the aforementioned embodiments, the translational-backward movement of said assembly for forming the grooves 1 between the standby position and the front position is carried out two times. Moreover, each time after the completion of the one-way movement of the assembly for forming the grooves 1, for example, the wood-based panel material moves in the 1st direction.

Therefore, the reduction in the number of cutting tools in contact with the sheet wood material, allows to reduce the resistance exerted by the node for forming the grooves 1 as a whole when forming grooves on the sheet wood material, which reduces the mechanical load on the said node. As a result, almost no malfunctions of the said unit arise, which facilitates the maintenance and care of the said unit.

Example 3:

The 1st presser foot 34 and the 2nd presser foot 108 have flat surfaces 34a and inclined surfaces 34b. For example, as shown in section in FIG. 11, the 1st presser foot 34 has a flat surface 34a and inclined surfaces 34b. Due to this design, said presser foot allows it to be pressed against both the flat surface of the sheet wood material 62 and its groove.

But the shape of the structure of said presser foot is not limited to the aforementioned. In this example, for example, as shown in a circle on the upper right side of FIG. 11, a 3rd presser foot 35 with an arcuate bottom portion 35a is used.

Example 4:

In the aforementioned embodiments, presser legs located on both side portions adjacent to the cutting tool 3 in a direction intersecting at right angles with the direction of movement of the cutting tool 3 press the flat surface of the wood-based panel material 62 and the inner surfaces of its grooves to the 1st support the table 42 or the 2nd support table 80 so as to provide a plane surface of the sheet of wood material 62 when forming the first grooves 62a and the second grooves 62c by means of cutting tools ntov 3.

But in the case of a relatively thin sheet of wood material or easily deformable material, it is preferable that only the presser foot located on one of both side portions adjacent to the cutting tool 3, in the direction intersecting at right angles with the direction of movement of the cutting tool 3, pressed sheet wood material 62 to said supporting table.

Example 5:

The 1st presser foot 34 shown in the aforementioned main embodiment, as well as the 2nd presser foot 108 shown in the additional embodiment 1, have each flat surface pressed against the upper surface of the wood panel material 62 and the inclined surfaces pressed against the inner surfaces of the grooves.

But, despite the complexity of the design of the device, in this case, have a presser foot provided with only a flat surface, and a presser foot equipped with only inclined surfaces. They move separately and independently from each other and are pressed to the places mentioned above.

Example 6:

In the main embodiment, as well as in additional embodiment 1, two external-threaded screws 10, each provided with a 1st servo motor 15, are rotated so as to move the assembly for forming the grooves 1.

But in this case, bevel gears are installed on the right ends of two screws with an external thread 10, opposite to the sides where the first servomotors 15 are located.

And also connect the driven shaft for transmitting rotation, equipped with bevel gears at its both ends, coinciding with the mentioned bevel gears, at right angles with both screws with external thread 10.

In addition, one of the two 1st servomotors 15 is removed and, through the remaining one 1st servomotor 15, one screw with an external thread 10 is rotated.

Thus, the rotation of the screw with the external thread 10 directly from the 1st servomotor is transmitted through the driven shaft to transmit rotation to the screw with the external thread 10 located on the other side. As a result, both screws with external thread 10 rotate synchronously with each other, and the axial direction of the rotary shaft 2 intersects at right angles with the direction of movement of the node for forming grooves 1. This ensures the correct formation of grooves.

Example 7

In the main embodiment, as well as in additional embodiment 1, when forming the first grooves 62a, the node for forming grooves 1, for example, as shown in Fig. 16, moves from the standby position indicated by the dot-dash line with two points to the front position, indicated by the dashed line, as well as when forming the 2nd grooves 62c, for example, as shown in Fig. 21, moves from the front position to the standby position.

In this case, the aforementioned movements are carried out the other way around. That is, when forming the first grooves 62a, as shown in FIG. 16, the assembly for forming the grooves 1 moves from the front position indicated by the dashed line to the standby position indicated by the dot-dash line with two points, and also when forming the second grooves 62c, as shown in FIG. 21, the node for forming the grooves 1 moves from the standby position indicated by the dot-dash line with two dots to the front position indicated by the dashed line.

On the grooving machine, rotary cutting tools 3 are arranged in a plurality, each having a thickness L1 in a direction parallel to the end edge of said wood-based wood material, and constituting a group of rotary cutting tools. Assume that m is an integer equal to or greater than 1. That is, rotary cutting tools 3 are arranged in a set such that the distance between adjacent rotary cutting tools 3 is mL1.

In this case, a group of rotary cutting tools is moved relative to said wood-based panel material in a direction perpendicular to said end edge and inclined with respect to the front and back sides of said wood-based panel material, thereby grooves are cut on said wood-based panel material. Then, the said group of rotary cutting tools is moved relative to the sheet wood material as mentioned below.

Assume that n is an integer equal to or greater than 1. That is, the group of rotary cutting tools and the wood-based panels are moved relative to each other by a distance nL1 in a direction parallel to said end edge of the wood-based sheet material. Subsequently, the group of rotary cutting tools is again moved relative to said wood material in said inclined direction, and thereby grooves are cut on said wood-based sheet material.

Reference designations

one Knot for forming grooves 3 Rotary cutting tool 28 1st lever 34 1st presser foot 34a Flat surface 34b Inclined surfaces 43 Shock absorber for cutting tool 43a Groove 43b Inner surface 48 2nd pneumatic cylinder 62 Sheet wood material 62a 1st groove 62b Inner surface 62s 2nd groove 107 3rd lever 108 2nd presser foot 108a Flat surface 108b Inclined surfaces

Claims (4)

1. A method of forming grooves at the ends of wood-based panels, characterized in that it comprises the following steps: placing a wood-based wood material and a group of rotary cutting tools having each thickness L1 in a direction parallel to the end edge of said wood-based material on a grooving machine than the total width of said wood-based panel material in said parallel direction, and spaced across the distance mL1, where m is an integer equal to or greater than 1, in alignment parallel to said end edge; place on the grooving machine a support table with grooves formed along its intended parts, where a group of rotary cutting tools passes along an oblique direction relative to the front and back sides of said wood-based wood material, and not interfering with the movement of the said group of rotary cutting tools, with the possibility of supporting the end part said wood-based panel material on its reverse side; moving said group of rotary cutting tools relative to the sheet wood material in a direction intersecting at right angles with the end edge of said sheet wood material and inclined with respect to its front and back sides; during such a movement, as mentioned above, the groups of rotary cutting tools are cut into grooves along the end part on the front side of the wood-based material, the end part on the back of which is supported on said support table — stage 1; move the group of rotary cutting tools relative to the aforementioned wood-based panels in a direction parallel to said end edge, to a distance nL1, where n is an integer equal to or greater than 1, then grooves on the said wood-based material again cut while moving the said group of rotary cutting tools relative to said wood-based panel material in said inclined direction — step 2; perform work processes in stage 1, as well as at least once - work processes in stage 2; when performing the above-mentioned working processes, many grooves are formed extending from the front side to the back side of said wood-based panel material in said inclined direction and having each V-shape in a section formed in a direction intersecting at right angles with said inclined direction in each section machining, constituting a distance L1 and located in a direction parallel to said end edge, the width of each of these grooves in the direction arallelnom said end edge is L1; and grooves are cut on the wood-based sheet material in step 1 by pressing the presser foot against the support table of a portion where said rotary cutting tools do not pass near the end edge of said wood-based sheet material on its front side. 2. A method of forming grooves at the ends of wood-based panels, characterized in that it comprises the following steps: placing a wood-based sheet material and a group of rotary cutting tools having each thickness L1 in a direction parallel to the end edge of said wood-based material on a grooving machine than the total width of said wood-based panel material in said parallel direction, and spaced across the distance mL1, where m is an integer equal to or greater than 1, in alignment parallel to said end edge; place on the grooving machine a support table with grooves formed along its intended parts, where a group of rotary cutting tools passes along an oblique direction relative to the front and back sides of said wood-based wood material, and not interfering with the movement of the said group of rotary cutting tools, with the possibility of supporting the end part said wood-based panel material on its reverse side; moving said group of rotary cutting tools relative to the sheet wood material in a direction intersecting at right angles with the end edge of said sheet wood material and inclined with respect to its front and back sides; during such a movement, as mentioned above, the groups of rotary cutting tools are cut into grooves along the end part on the front side of the wood-based material, the end part on the back of which is supported on said support table — stage 1; move the group of rotary cutting tools relative to the aforementioned wood-based panels in a direction parallel to said end edge, to a distance nL1, where n is an integer equal to or greater than 1, then grooves on the said wood-based material again cut while moving the said group of rotary cutting tools relative to said wood-based panel material in said inclined direction — step 2; perform work processes in stage 1, as well as at least once - work processes in stage 2; when performing the above-mentioned working processes, many grooves are formed, extending from the front side to the back side of said wood-based panel material in said inclined direction and having each V-shape in a section formed in a direction intersecting at right angles with said inclined direction in each section machining, constituting a distance L1 and located in a direction parallel to said end edge, the width of each of these grooves in the direction arallelnom said end edge is L1; and grooves are cut on the wood-based sheet material in step 2 while pressing with the presser foot a portion of said wood-based wood material, where grooves in step 1 are already formed on said supporting table. 3. A method of forming grooves at the ends of wood-based panels, characterized in that it comprises the following steps: placing a wood-based sheet material and a group of rotary cutting tools having each thickness L1 in a direction parallel to the end edge of said wood-based material on a grooving machine than the total width of said wood-based panel material in said parallel direction, and spaced across the distance mL1, where m is an integer equal to or greater than 1, in alignment parallel to said end edge; place on the grooving machine a support table with grooves formed along its intended parts, where a group of rotary cutting tools passes along an oblique direction relative to the front and back sides of said wood-based wood material, and not interfering with the movement of the said group of rotary cutting tools, with the possibility of supporting the end part said wood-based panel material on its reverse side; moving said group of rotary cutting tools relative to the sheet wood material in a direction intersecting at right angles with the end edge of said sheet wood material and inclined with respect to its front and back sides; during such a movement, as mentioned above, the groups of rotary cutting tools are cut into grooves along the end part on the front side of the wood-based material, the end part on the back of which is supported on said support table — stage 1; move the group of rotary cutting tools relative to the aforementioned wood-based panels in a direction parallel to said end edge, to a distance nL1, where n is an integer equal to or greater than 1, then grooves on the said wood-based material again cut while moving the said group of rotary cutting tools relative to said wood-based panel material in said inclined direction — step 2; perform work processes in stage 1, as well as at least once - work processes in stage 2; when performing the above-mentioned working processes, many grooves are formed, extending from the front side to the back side of said wood-based panel material in said inclined direction and having each V-shape in a section formed in a direction intersecting at right angles with said inclined direction in each section machining, constituting a distance L1 and located in a direction parallel to said end edge, the width of each of these grooves in the direction arallelnom said end edge is L1; cutting a groove on a sheet of wood material in stage 1 is carried out by pressing the presser foot against the support table of the area where the mentioned rotary cutting tools do not pass, near the end edge of the said wood material on its front side; and cutting the grooves on the wood-based sheet material in step 2 is carried out by pressing with a presser foot a portion of said wood-based wood material, where grooves in step 1 have already been formed to said supporting table. 4. The method according to claim 3, characterized in that the presser foot has a flat surface with the possibility of contact with the upper surface of the aforementioned wood material and inclined surfaces with the possibility of contact with the cut surfaces of the aforementioned wood material.

Images