JP2020069613A - Cutting device of board-shaped building material formed by hardening non-combustible powder - Google Patents

Abstract

To flatten a cut surface by improving efficiency of a cutting process of a gypsum board or the like.SOLUTION: A gypsum board 16 is cut with a cutting blade 22. In the first mode, a blade line 44 is inclined at an angle α, and after start of cutting, the first mode is finished just before arrival of the blade line 44 at an uncut surface 46. In the second mode, the blade line 44 is inclined at an angle β=180°-α, and the second mode is finished just before arrival of the blade line 44 at an uncut surface 45 on the other side. In this case, a constant force FH*+Fcos(α) is applied in parallel to the blade line. The operation is repeated.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a board cutting device for cutting and processing a building material such as a gypsum board used for a wall or a ceiling of a building into a designed size, and in particular, a board-shaped building material obtained by hardening non-combustible powder. Regarding the cutting device.

  An apparatus has been introduced that cuts gypsum board used for walls and ceilings of buildings with less generation of chips and noise.

JP, A, 2001-121530

The known prior art has the following problems to be solved.
Since the device introduced in the above-mentioned patent document 1 cuts a gypsum board by using a plurality of circular cutters, it has a feature that there are few chips and highly accurate cutting is possible. However, there is a problem that the device becomes relatively large. In addition to plasterboard, volcanic glass multi-layer boards are also frequently used as building materials. All are cut with the same device. However, since a board-shaped building material obtained by hardening such non-combustible powder is fragile, there is a problem that chips are likely to occur when cutting. The present invention has been made to solve these problems.

The following configurations are means for solving the above problems.
<Structure 1>
It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force F * and the inclination angle θ * are obtained in advance when the surface applied inward from the surface of the building material is good,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC * and FH * are used as constant parameters for the above cutting blade. The cutting device for the board-shaped building material, which is stored in a driving device and the cutting blade driving device executes the following control.
(1) A force F = FC * / sin (α) (α is given by the following (2) so as to cut the board-like building material along a plane intersecting one surface and the other surface of the board-like building material. Continue to add the angle of inclination described in)) until cutting is completed.
(2) In the first mode, the blade line of the cutting blade is inclined at an angle α (60 ° ≦ α <90 °) with respect to the surface of the board-shaped building material.
(3) Move the cutting blade in the direction from one surface to the other surface parallel to the blade line, and apply a constant force FH * + Fcos (α) in parallel to the blade line from one surface side to the other surface side. It acts in the direction toward.
(4) Immediately before the blade line reaches the uncut end of the other surface, the first mode of moving the cutting blade parallel to the blade line is ended.
(5) In the second mode, the blade line is inclined at an angle β = 180 ° −α with respect to the surface of the board-shaped building material.
(6) Move the cutting blade parallel to the blade line from the other surface toward one surface, and apply a constant force FH * + Fcos (α) in parallel to the blade line from the other surface to one surface. It acts in the direction.
(7) Immediately before the blade line reaches the uncut end of the one surface, the second mode of moving the cutting blade parallel to the blade line is ended.
(8) Hereinafter, the first mode and the second mode are alternately repeated to cut the entire board.

<Structure 2>
It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material having a thickness of 9.5 mm or more and 15 mm or less, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force F * and the inclination angle θ * are obtained in advance when the surface applied inward from the surface of the building material is good,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC * and FH * are used as constant parameters for the above cutting blade. A cutting device for a board-shaped building material, which is stored in a driving device and the cutting blade driving device executes the following control.
(1) A force F = FC * is continuously applied until the cutting is completed so as to cut the board-shaped building material along a plane intersecting one surface and the other surface of the board-shaped building material.
(2) The blade line is oriented at right angles to the surface of the board-shaped building material.
(3) The cutting blade is reciprocated parallel to the blade line, and FH * acts in the direction in which the blade line moves.
(4) The amplitude of the reciprocating motion is set in the range of 1 mm or more and 5 mm or less.
(5) The frequency of the reciprocating motion is set to 1,000 times or more and 7,000 times or less per minute.

<Structure 3>
It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material having a thickness of 9.5 mm or more and 15 mm or less, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. When the surface applied in the direction from the surface of the building material inward is good, the force F *, the inclination angle θ *, and the cycle of the generated roughness are obtained in advance,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC *, FH * and the period of roughness are constant parameters. A board cutting device which is stored in the cutting blade driving device as the above, and the cutting blade driving device executes the following control.
(1) A force F = FC * is continuously applied until the cutting is completed so as to cut the board-shaped building material along a plane intersecting one surface and the other surface of the board-shaped building material.
(2) The blade line is oriented at right angles to the surface of the board-shaped building material.
(3) The cutting blade is reciprocated parallel to the blade line, and FH * acts in the direction in which the blade line moves.
(4) The amplitude of the reciprocating motion is set in the range of 1 mm or more and 5 mm or less.
(5) The reciprocating frequency is set to a cycle shorter than the rough cycle.
The combination of the cross section of the board-shaped building material and the surface added in the direction from the surface of the board-shaped building material to the inside described in the configurations 1 to 3 is from the surface of the board-shaped building material in the entire cross section. This is a portion excluding the surface to which the force FH is applied in the outward direction.

  Since the cutter blade type cutting blade reciprocates with a predetermined force in the longitudinal direction while cutting, the frictional force generated between the cutting blade and the board-shaped building material along the cutting line Generates a force to tear building materials. This makes it possible to obtain a clean cut surface. Further, the cutting speed can be set at an economical level. In particular, it is possible to prevent the surface of the board-shaped building material obtained by hardening the non-combustible powder, which is peculiar to the board-shaped building material, from being roughened or chipped at the portion where the cutting blade intersects.

FIG. 4 is a principle diagram of cutting of a blade described in the first embodiment. 5 is an explanatory diagram of a method of controlling the cutting blade of the device of Example 1. FIG. It is a specific example perspective view of the mechanism which enables the above-mentioned control. It is explanatory drawing which shows the internal structure example of a reciprocating drive mechanism. It is explanatory drawing of the operation example of a cutting device.

  Hereinafter, the embodiment of the present invention will be described in detail for each example.

  In the present invention, the object to be cut with the blade is a board-like building material obtained by hardening non-combustible powder, such as gypsum board and volcanic glassy multi-layer board used in buildings.

  Cutting a gypsum board with a circular cutter as in Patent Document 1 has an effect of minimizing chips as compared with the case of using a saw. In the present invention, one knife-shaped cutter is used. However, it has been found that board-shaped building materials such as gypsum board in which non-combustible powder is hardened are brittle, and therefore when a cutter is run to cut, the surface of the cut portion will be roughened due to protrusion or chipping. In the following examples, gypsum board will be described as an example, but the same can be said for board-shaped building materials having similar properties.

  Here, a mechanism of cutting a board-shaped building material with a cutter will be described. FIG. 1 is a cutting principle diagram. When the gypsum board is cut by this method, the gypsum board is smoothly cut except for the portion extremely close to the one surface 45. On the other hand, at a portion extremely close to the one surface 45, a part of the cut edge may be projected or chipped to be rough. The cause will be described below. Here, the gypsum board is a plate-shaped rectangular parallelepiped.

  FIG. 1A shows a top view of a state where the cutting blade 22 cuts the face material 16. 1B shows a side view of the face material 16 and the cutting blade 22 at this time.

  As shown in FIG. 1B, a force F is applied to the cutting blade 22 in the direction of the arrow parallel to the surface of the face material 16. This force F can be decomposed into a force FH parallel to a force FC perpendicular to the blade line (line of the tip portion of the blade) 44 of the cutting blade 22. The force FC is a force that cuts the face material 16. A frictional force is generated between the blade line 44 and the face material 16 in the direction opposite to the force FH.

  In this way, when the blade line 44 is inclined with respect to the surface of the face material 16 and the force F is applied, the same effect as pull-cutting is obtained instead of so-called push-cutting. According to the cutting theory, the above frictional force causes a force FW that spreads the cut of the face material 16 on both side surfaces of the blade line 44 shown in FIG.

  In order to obtain an appropriate amount of force FW on both sides of the blade line 44, the magnitude of the frictional force at the portion where the blade line 44 and the face material 16 contact each other becomes important. The frictional force is generated in the linear portion where the blade line 44 and the gypsum board 16 are in contact with each other in FIG. The force FH is evenly distributed and applied along the blade line 44, and a frictional force is generated against it.

  In FIG. 1B, a dashed-dotted circle R is drawn at a portion where the blade line 44 and one surface 45 of the face material 16 intersect. At the portion of the circle R of the one-dot chain line, that is, the portion extremely close to the one surface 45, the above-mentioned force FH is applied in the direction toward the outer side of the gypsum board, so that one surface as shown in FIG. 1 (c). A part of the cut end of 45 becomes rough so as to protrude. Alternatively, it is considered that the protruding part is dropped and chipped.

  On the other hand, as shown in FIG. 1 (d), on the other surface (opposite surface) 46 of the gypsum board 16, the above-mentioned force FH is applied in the direction toward the inside of the gypsum board 16, so that similar roughness does not occur. .. This is the reason why a part of the cut surface is roughened in a portion extremely close to the one surface 45 while the portion other than the portion extremely close to the one surface 45 is smoothly cut.

  Actually, when the gypsum board 16 was cut while changing the force F and the inclination angle θ variously, a smooth cutting surface and a wavy cutting surface were obtained by the combination of the force F and the inclination angle θ. .. From this, it is understood that the cut surface having desired smoothness can be obtained by adjusting the force F and the inclination angle θ and selecting the force FC and the force FH to have appropriate sizes.

  Then, when FC = Fsin (θ) and FH = Fcos (θ) are calculated, the larger the FC and FH are, the smoother the cut surface can be obtained. .. Since the equipment cost increases as the force F increases, the cut surface should have a certain level of smoothness. Then, the optimum force F and inclination angle θ that minimize the equipment cost can be selected according to the required smoothness of the cut surface. That is, the optimum force F and inclination angle θ are selected according to the product specifications.

  For example, for a gypsum board (thickness: 15 mm), the optimum force F and inclination angle θ were F = 200 [N] and θ = π / 4 (45 degrees), so the optimum FC = 141 [N], the optimum FH = 141 [N]. In the following, FC * is the optimum value of FC and FH * is the optimum value of FH. It should be noted that one surface 45 was roughened such that a part of the cut end was projected or chipped at intervals of about 10 mm. The cutting blade was sent at 0.4 [m / s] (constant speed).

  To summarize the above, the optimum force for cutting a plaster board (15 mm thick), the force (FC *) for cutting it is 141 [N], and the direction is perpendicular to the blade line. You can The magnitude of the force (FH *) that generates the optimum frictional force is 141 [N]. Therefore, the magnitude of the frictional force that obtains the optimum force to spread the face material (hereinafter referred to as FW *) is 141 [N] (because it is balanced with FH *), and the direction is arbitrary and parallel to the blade line. The direction is arbitrary because FW * does not depend on the direction of frictional force.

  As described above, depending on the thickness of the gypsum board, even if the optimum force F and inclination angle θ are applied to the cutting blade in each case to cut, only one surface 45 of the gypsum board 16 becomes rough. May occur. This can be solved by the following cutting control. That is, when the blade line 44 intersects the one surface 45 or the other surface 46, the movement of the cutting blade is controlled so that the force FH * parallel to the blade line is directed inward from the surface of the gypsum board.

FIG. 2 is an explanatory diagram of a control method of the cutting blade of the device of the first embodiment.
The symbols used in the explanation of FIG. 2 are as follows, and FC * and FH * are obtained by the above method.
F: Force acting in the moving direction of the cutting blade (= FC * / sin (α))
α: Inclination angle of cutting blade with respect to the surface of gypsum board (angle between blade line and one surface)
(60 degrees ≤ α <90 degrees)
FC *: Optimal value (constant) of the force that cuts the face material in the moving direction of the cutting blade perpendicular to the blade line (to minimize equipment costs)
FH *: Optimal value (constant) of the force that is parallel to the blade line and generates frictional force between the blade line and the gypsum board
FL: A force that generates frictional force that spreads the gypsum board,
Direction is opposite to F cos (α), size is FH * + F cos (α)

  First, FIG. 2A is a side view of the gypsum board 16 and the cutting blade 22 immediately before the cutting of the gypsum board 16 using the cutting blade 22 is started. Here, the blade line 44 is inclined with respect to the surface of the gypsum board 16 at an angle α as shown in FIG. (60 degrees ≤ α <90 degrees)

  Then, the cutting blade 22 is moved while the force F = FC * / sin (α) is applied to the cutting blade 22 in the direction of the arrow parallel to the surface of the gypsum board 16 to start cutting. The force F in the direction of the arrow maintains a constant value until the cutting is completed, and the moving speed of the cutting blade is kept constant until the cutting is completed.

  The force Fcos (α) that is parallel to the blade line 44 and that acts on the outside of the one surface 45 is canceled, and the magnitude of the force that acts on the inside of the one surface 45 becomes FH * + FH * + Fcos (α ) Force is applied to the inward direction of the gypsum board parallel to the blade line. The cutting blade 22 is moved parallel to the blade line 44 from one surface side to the other surface side, and the gypsum board 16 is attached to the contact surface between the gypsum board 16 and the blade line 44 as described in FIG. Generates a force FW * that tries to push it to the left and right.

  In FIG. 2, the cross section of the gypsum board 16 to be cut is hatched. There is no hatching on the already cut surface. When the cutting is started from the state of (a), the gypsum board 16 is torn as shown in (b) by the action of the force FC * and the force FW *. At this time, the portion of the circle R is in the state shown in FIG. 1D, and the above-mentioned roughness does not occur.

  As shown in FIG. 2 (b), cutting is advanced, and immediately before the blade line 44 reaches the other uncut surface 46, the blade line 44 is angled with respect to the surface of the face material 16 as shown in FIG. 2 (c). The inclination is changed so that β = 180 degrees−α. The angle α shown in FIG. 2A and the angle α shown in FIG. 2C have the same value. The reason why the angle α shown in FIG. 2 (a) and the angle α shown in FIG. 2 (c) are set to the same value is to keep the force F constant.

  Then, similarly to the above, the force Fcos (α) that is parallel to the blade line 44 and that acts on the outside of the other surface 46 is canceled, and a force that acts toward the inside of the other surface 46 is applied. A force of FH * + Fcos (α) is applied inward of the gypsum board parallel to the blade line so that the magnitude becomes FH *. In this way, the cutting blade 22 is moved in parallel to the blade line 44 from the other surface side to the one surface side, and the force FW that attempts to spread the gypsum board 16 left and right on the contact surface between the gypsum board 16 and the blade line 44. Generate *. As a result, the gypsum board 16 is being torn as shown in FIG.

  Here, as shown in FIG. 2D, cutting is advanced so that the blade line 44 is inclined at an angle α with respect to the surface of the gypsum board immediately before the blade line 44 reaches one of the uncut surfaces 45. Change the tilt. That is, the inclination shown in FIG. 2A is obtained (FIG. 2E). The uncut surface is the upper and lower surfaces (surface 46 and surface 45) of the hatched portion of the gypsum board 16 in FIG.

  Then, similarly to the above, by canceling the force Fcos (α) acting on the outside of one surface in parallel to the blade line, the magnitude of the force acting on the inside of one surface becomes FH *, FH * The force of + F cos (α) is applied to the inside of the gypsum board parallel to the blade line. When the cutting blade 22 is moved parallel to the blade line 44 from one surface side to the other surface side, the face material 16 is torn as shown in FIG. 2 (f). 2 (f), 2 (g) and 2 (h), the same operation as above is repeated to cut the gypsum board 16.

  Here, a method of setting the inclination angle α will be described. Since F = FC * / sin (α), the force F can be made smaller as α becomes closer to 90 degrees, and the energy cost can be reduced. However, when α is close to 90 degrees, if the moving speed of the cutting blade is constant, the frequency of switching the inclination angle between the cutting blade and one surface or the other surface shown in FIGS. 2A and 2C increases. Therefore, there is a trade-off relationship that the mechanical load increases. Considering this trade-off relationship, it is advisable to try and obtain a good value of α when 60 ° ≦ α <90 °.

The control operation of the cutting blade 22 by the cutting blade driving device 24 is summarized as follows.
(1) The blade line of the cutting blade is inclined with respect to the surface of the gypsum board at an angle θ, and the cutting blade is moved to cut the gypsum board while applying a force F in a direction parallel to the surface of the gypsum board. ..
The gypsum board has a good cross section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force FH is the surface of the gypsum board. The force F * and the inclination angle θ * are obtained in advance when the surface applied in the direction from the inside to the inside is good. After that, calculate FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *), and cut the above using FC * and FH * as constant parameters. Store in the drive.

Along the plane that intersects one surface of the gypsum board and the other surface, force F = FC * / sin (α) (α is the angle described in (2) below) until the cutting is completed, just like cutting the gypsum board. Continue to add.
(2) In the first mode, the blade line is inclined at an angle α with respect to the surface of the gypsum board. (This angle α is fixed to an arbitrary value within the range of (60 degrees ≦ α <90 degrees).)
(3) Move the cutting blade 22 in a direction parallel to the blade line 44 from one surface 45 toward the other surface 46, and apply a constant force FH * + Fcos (α) in parallel to the blade line 44 to the one surface 45. From one side to the other surface 46 side.
(4) Immediately before the blade line 44 reaches the other uncut surface 46, the first mode of moving the cutting blade 22 parallel to the blade line 44 is ended.
(5) In the second mode, the blade line 44 is inclined at an angle β = 180 ° −α with respect to the surface of the face material 16.
(6) Move the cutting blade 22 parallel to the blade line 44 in the direction from the other surface 46 to the one surface 45, and apply a constant force FH * + Fcos (α) in parallel to the blade line 44 to the other surface 46. From one side to the one surface 45.
(7) Immediately before the blade line 44 reaches the one uncut surface 45, the second mode of moving the cutting blade 22 parallel to the blade line 44 is ended.
(8) Hereinafter, the first mode and the second mode described above are alternately repeated to cut the entire gypsum board 16.

FIG. 3 is a perspective view of a specific example of a mechanism that enables the above control.
An overall structure for traveling the traveling mechanism 40 along the rails 42 and cutting the gypsum board 16 using the cutting blade drive device 24 attached to the traveling mechanism 40 will be described with reference to FIG. 3. The gypsum board 16 is fixed on the working table 14 by a mechanism (not shown). The upper end of the cutting blade 22 is fixed to the reciprocating drive mechanism 28 using a bolt 36. In the illustrated state, the blade line 44 is supported substantially vertically to the upper and lower surfaces of the gypsum board 16. Then, the operation described in FIG. 2 is realized by the control of the reciprocating drive mechanism 28.

FIG. 4 is an explanatory diagram showing an example of the internal structure of the reciprocating drive mechanism 28.
With reference to FIGS. 4A, 4B, and 4C, a description will be given of realizing the operation as described in FIG. In FIG. 4A, the cutting blade 22, the bolt 36, and the piston 54 are fixed to each other so as to move integrally. 50 and the piston 54 are connected via a crankshaft 52. When the rotor 50 rotates, the crankshaft 52 reciprocates in the vertical direction in the figure. This causes the piston 54 to also reciprocate up and down.

  On the other hand, the tips of the pins 60 and the bolts 36 (tips toward the back side of the drawing) are assembled so as to be guided by the grooves of the guide plate 64 shown in FIG. 4C. That is, in the vicinity of the bottom dead center of the piston 54, the piston 54 tilts to the right and the state shown in FIG. On the other hand, in the vicinity of the top dead center of the piston 54, the piston 54 tilts to the left, resulting in the state shown in FIG. By repeating such an operation, the cutting blade 22 can be controlled as described with reference to FIG. It is needless to say that the structures shown in FIGS. 3 and 4 described above are merely examples, and any mechanism having a similar function can be freely changed.

From the data when actually cutting the plaster board (thickness: 15 mm), even if the inclination angle α of the cutting blade 22 is 90 degrees, smooth cutting can be performed by appropriately selecting the speed and amplitude for reciprocating the cutting blade. It turns out that you can get a face. That is, during the trial for obtaining F and α as described above, the plaster board (thickness: 15 mm) was rough such that part of the cut edge was projected or chipped at intervals of about 10 mm.

  When the FH shown in FIG. 1 (b) generated during the cutting of the gypsum board is applied in the direction toward the outside of the gypsum board, in actual cutting, a part of the cut edge is roughened so as to be projected or chipped. This phenomenon occurs periodically. By the above trials, the periodicity of this storm can be found. In this example, at the cutting blade speed of 0.4 [m / s], one protrusion occurred every 0.025 [s]. If the reciprocating speed is switched in a shorter cycle than this, the occurrence of roughness can be prevented or minimized. That is, the frequency of reciprocating the cutting blade is set to about 40 [times / s] = about 2400 [times / min], which is a cycle shorter than the above-described roughness cycle.

  The diagram of FIG. 4D shows a structure in which the piston 54 is guided by the guide wall 64 and linearly moves up and down without tilting. In this figure, when the cutting blade 22 is reciprocated parallel to the blade line 44, a force parallel to the blade line 44 acts on one surface 45 and the other surface 46 of the face material 16 at regular time intervals.

  That is, the inclination angle α of the cutting blade 22 shown in the first embodiment is set to 90 degrees, and the movement of the cutting blade in the direction parallel to the blade line 44 and the switching of the direction are set to 3000 [times / minute]. When the gypsum board (thickness: 15 mm) is cut in this manner, it is possible to prevent a phenomenon that a part of the cut surface is roughened at a portion extremely close to the one surface 45 or the other surface 46. When the inclination angle α = 90 degrees, it is not necessary to change the inclination angle, and the mechanical load of inclination control can be eliminated.

The control operation of the cutting blade 22 by the cutting blade driving device 24 of the second embodiment is summarized as follows.
It is the same as in Example 1 for cutting a board-shaped building material obtained by hardening non-combustible powder into specified dimensions.

  A device for fixing the gypsum board having a thickness of 9.5 mm or more and 15 mm or less, a cutting blade for cutting the gypsum board, and a cutting blade driving device for controlling the operation of the cutting blade are provided. In Example 2, the thickness of the gypsum board that can be cut well is in this range. The cause is the brittleness of the material.

The blade line of the cutting blade is inclined at an angle θ with respect to the surface of the gypsum board, and the cutting blade is moved to cut the gypsum board while applying force F in a direction parallel to the surface of the gypsum board.

Here, the cross section of the board is good, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force F * and the inclination angle θ * when the surface applied in the direction from the surface to the inside is good are obtained in advance.

FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC * and FH * are used as constant parameters for the above cutting blade. The cutting blade driving device executes the following control, which is stored in the driving device.

(1) Continue to apply force F = FC * until the cutting is completed, so that the plaster board is cut along a plane that intersects one surface of the gypsum board and the other surface.
(2) Orient the blade line at right angles to the surface of the gypsum board.
(3) The cutting blade is reciprocated parallel to the blade line, and FH * acts in the direction in which the blade line moves.
(4) The amplitude of the reciprocating motion is set in the range of 1 mm or more and 5 mm or less.
(5) The frequency of the reciprocating motion is set to 1,000 times or more and 7,000 times or less per minute.

It can be seen from the mechanism of cutting with the cutter described in FIG. 1 that in order to cut a gypsum board, a force that spreads the gypsum board on both sides of the cutting blade that causes a force parallel to the blade line of an appropriate size, This means that a cutting force in the direction perpendicular to the blade line of appropriate size is required.

FIG. 5 is an explanatory diagram of an operation example of the cutting device.
As described above, in the present invention, the control that emphasizes the frictional force between the cutting blade 22 and the cut surface of the gypsum board 16 is performed. For example, as shown in FIG. 5 (a), when cutting the gypsum board 16 at the central portion of the cutting blade 22, and as shown in FIG. 5 (b), the gypsum board 16 is cut near the end portion of the cutting blade 22. Compare with cutting.

The contact area between the cutting blade 22 and the cut surface of the gypsum board 16 is smaller in the case shown in FIG. 5 (b). That is, it is preferable to control the gypsum board 16 to be cut at a portion as close to the end of the cutting blade 22 as possible.

Even with the above control, the cutting method in which the cutting blade is moved in only one direction may cause a chip in the gypsum board immediately before the cutting of the gypsum board. As shown in FIG. 5C, the gypsum board 16 is pressed and fixed on the work table 74 by the clamp 72, and an elastic body such as a rubber block is arranged at the last cut portion. This rubber block has the function of positioning the board and preventing chipping just before the end of cutting. This may also be added to the above device.

12 cutting device 14 processing table 16 gypsum board 18 positioning device 20 clamp device 22 cutting blade 24 cutting blade drive device 26 steady rest device 28 reciprocating drive mechanism 30 support mechanism 32 angle adjusting mechanism 34 metal fitting 36 bolt 38 hole 40 traveling mechanism 42 rail 44 Blade line 45 One surface 46 The other surface 50 Rotor 52 Crankshaft 54 Piston 60 Pin 64 Guide plate 66 Guide wall

Claims (3)

It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force F * and the inclination angle θ * are obtained in advance when the surface applied inward from the surface of the building material is good,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC * and FH * are used as constant parameters for the above cutting blade. The cutting device for the board-shaped building material, which is stored in a driving device and the cutting blade driving device executes the following control.
(1) A force F = FC * / sin (α) (α is given by the following (2) so as to cut the board-like building material along a plane intersecting one surface and the other surface of the board-like building material. Continue to add the angle of inclination described in)) until cutting is completed.
(2) In the first mode, the blade line of the cutting blade is inclined at an angle α (60 ° ≦ α <90 °) with respect to the surface of the board-shaped building material.
(3) Move the cutting blade in the direction from one surface to the other surface parallel to the blade line, and apply a constant force FH * + Fcos (α) in parallel to the blade line from one surface side to the other surface side. It acts in the direction toward.
(4) Immediately before the blade line reaches the uncut end of the other surface, the first mode of moving the cutting blade parallel to the blade line is ended.
(5) In the second mode, the blade line is inclined at an angle β = 180 ° −α with respect to the surface of the board-shaped building material.
(6) Move the cutting blade parallel to the blade line from the other surface toward one surface, and apply a constant force FH * + Fcos (α) in parallel to the blade line from the other surface to one surface. It acts in the direction.
(7) Immediately before the blade line reaches the uncut end of the one surface, the second mode of moving the cutting blade parallel to the blade line is ended.
(8) Hereinafter, the first mode and the second mode are alternately repeated to cut the entire board.
It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material having a thickness of 9.5 mm or more and 15 mm or less, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. The force F * and the inclination angle θ * are obtained in advance when the surface applied inward from the surface of the building material is good,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC * and FH * are used as constant parameters for the above cutting blade. A cutting device for a board-shaped building material, which is stored in a driving device and the cutting blade driving device executes the following control.
(1) A force F = FC * is continuously applied until the cutting is completed so as to cut the board-shaped building material along a plane intersecting one surface and the other surface of the board-shaped building material.
(2) The blade line is oriented at right angles to the surface of the board-shaped building material.
(3) The cutting blade is reciprocated parallel to the blade line, and FH * acts in the direction in which the blade line moves.
(4) The amplitude of the reciprocating motion is set in the range of 1 mm or more and 5 mm or less.
(5) The frequency of the reciprocating motion is set to 1,000 times or more and 7,000 times or less per minute. It is for cutting a board-shaped building material made of hardened non-combustible powder into specified dimensions.
A device for fixing the board-shaped building material having a thickness of 9.5 mm or more and 15 mm or less, a cutting blade for cutting the board-shaped building material, and a cutting blade drive device for controlling the operation of the cutting blade,
The blade of the cutting blade is inclined at an angle θ with respect to the surface of the board-shaped building material, and the cutting blade is moved while applying a force F in a direction parallel to the surface of the board-shaped building material. Cutting building material
The board-shaped building material has a good cross-section, and the force F is decomposed into a force FC perpendicular to the blade line of the cutting blade and a force FH parallel to the blade line. When the surface applied in the direction from the surface of the building material inward is good, the force F *, the inclination angle θ *, and the cycle of the generated roughness are obtained in advance,
FC * with F * = FC * / sin (θ *) and FH * with F * = FH * / cos (θ *) are calculated, and FC *, FH * and the period of roughness are constant parameters. A board cutting device which is stored in the cutting blade driving device as the above, and the cutting blade driving device executes the following control.
(1) A force F = FC * is continuously applied until the cutting is completed so as to cut the board-shaped building material along a plane intersecting one surface and the other surface of the board-shaped building material.
(2) The blade line is oriented at right angles to the surface of the board-shaped building material.
(3) The cutting blade is reciprocated parallel to the blade line, and FH * acts in the direction in which the blade line moves.
(4) The amplitude of the reciprocating motion is set in the range of 1 mm or more and 5 mm or less.
(5) The reciprocating frequency is set to a cycle shorter than the rough cycle.

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