JP4048982B2 - Cutting method and cutting apparatus for ceramic green molded body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for cutting a ceramic green molded body and a cutting apparatus, and in particular, a method for cutting a ceramic green molded body, comprising a step of sequentially cutting the ceramic green molded body from one end side thereof by pressing with a cutting blade, and The present invention relates to a cutting device.
[0002]
[Prior art]
For example, in order to efficiently mass-produce ceramic electronic components such as multilayer ceramic capacitors, a mother-state ceramic green molded body from which a plurality of ceramic electronic components should be taken out is first produced, and a plurality of ceramic electronic components are taken out therefrom. Cutting a ceramic green molded body has been performed. For example, when a multilayer ceramic electronic component such as a multilayer ceramic capacitor is to be manufactured, the ceramic green molded body includes a multilayer body of a plurality of ceramic green sheets in which an internal conductor film is formed along a specific interface. Is done.
[0003]
The cutting process of the ceramic green molded body described above is usually performed as follows.
[0004]
FIG. 6 is a front view showing a state in which a step of cutting the ceramic green molded body 1 is being performed (see, for example, Patent Document 1).
[0005]
The ceramic green molded body 1 having the opposing main surfaces 2 and 3 is placed on the table 4, and the first end surface 6 is brought into contact with the positioning reference block 5 rising from one end of the table 4, Positioned. Although not shown, the table 4 is usually provided with a large number of suction ports that exert a negative pressure on the ceramic green molded body 1, and this negative pressure is exerted on the ceramic green sheet 1. The above-described positioning is performed more reliably.
[0006]
Next, by lowering the cutting blade 7 toward the main surface 2 of the ceramic green molded body 1, the ceramic green molded body 1 is cut by pressing.
[0007]
The table 4 and the cutting blade 7 are configured to be relatively movable in the surface direction of the main surfaces 2 and 3 of the ceramic green molded body 1. And as above-mentioned, whenever it complete | finishes a cutting process, the table 4 and the cutting blade 7 are moved relatively, and the ceramic green molded object 1 is obtained by repeating these cutting processes and a movement process several times. From the second end face 8 side facing the first end face 6 described above, a state in which the plurality of cutting lines 9 are sequentially cut is provided.
[0008]
Further, when the cutting in the cutting progress direction 10 indicated by the arrow is completed by repeating the cutting process and the moving process as described above, the table 4 and the cutting blade 7 are normally rotated by 90 degrees, The same cutting process and moving process are repeated.
[0009]
On the other hand, when the thickness of the ceramic green molded body 1 is made thicker or when the cutting operation by the cutting blade 7 is made faster, the resistance received by the cutting blade 7 during the cutting process becomes larger, and the ceramic green molded body 1 It may be difficult to perform stable cutting in a direction orthogonal to the principal surface 2 of the first. In an extreme case, the cutting blade 7 bends during cutting, and as a result, the cutting line 9 may be inclined as shown in FIG.
[0010]
In order to solve these problems, as indicated by a broken line in FIG. 6, guides 11 and 12 are arranged on the front side and the rear side in the cutting progress direction 10 of the cutting blade 7, respectively. It has also been proposed to restrict the approach operation to always be directed in an appropriate direction (see, for example, Patent Document 2).
[0011]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-90894
[Patent Document 2]
JP 2001-102241 A
[0012]
[Problems to be solved by the invention]
However, when the cutting process is performed on the ceramic green molded body 1 by bringing the first end surface 6 of the ceramic green molded body 1 into contact with the positioning reference block 5, the following problems are encountered. Sometimes.
[0013]
In the cutting process, as the cutting blade 7 is lowered, stresses F1 and F2 in a direction perpendicular to the lowering direction of the cutting blade 7 act on the rear surface side and the front surface side of the cutting blade 7. These stresses F1 and F2 are reaction forces when the cutting blade 7 elastically or plastically deforms the ceramic green molded body 1 in the surface direction of the main surfaces 2 and 3.
[0014]
When the cutting blade 7 approaches the positioning reference block 5 as the cutting process and the moving process proceed, that is, when the number of uncut parts of the ceramic green molded body 1 becomes smaller, the reaction from the positioning reference block 5 occurs. The force F3 becomes larger, and the cutting blade 7 may be deformed in the opposite direction to the positioning reference block 5 as indicated by the arrow 13 due to the influence of the reaction force F3. That is, the cutting blade 7 is usually made relatively thin in order to enable high-precision cutting, and therefore, the deformation as described above is likely to occur.
[0015]
As a result, the cutting line 9 may be inclined, resulting in an oblique cutting state as shown in FIG. When the ceramic green molded body 1 is a laminated body of a plurality of ceramic green sheets in which an internal conductor film is formed along a specific interface, the above-described oblique cutting state causes undesired deformation or misalignment of the internal conductor film. The internal conductor film may be exposed at an undesired location, or the internal conductor film may not be exposed at a location that needs to be exposed.
[0016]
On the other hand, guides 11 and 12 as shown by broken lines in FIG. 6 are arranged, and these guides 11 and 12 are brought into contact with the main surface 2 of the ceramic green molded body 1 and pushed toward the main surface 2 of the ceramic green molded body 1. Even if the cutting process by the cutting blade 7 is performed while applying pressure, the change of the reaction force F3 from the positioning reference block 5 cannot always be dealt with. As a result, a difference occurs between the stresses on the rear side and the front side of the cutting blade 7, and it is inevitable that the cutting blade 7 is deformed as indicated by the arrow 13.
[0017]
Although it is conceivable to increase the pressing force from the guides 11 and 12 to such an extent that the change in the reaction force F3 can be ignored, in this case, the cutting blade 7 becomes difficult to enter the ceramic green molded body 1, After the cutting process, the ceramic green molded body 1 strongly adheres to the guides 11 and 12, which causes a problem in that it hinders the subsequent process.
[0018]
  Accordingly, an object of the present invention is to provide a method for cutting a ceramic green molded body that can solve the above-described problems.And cutting deviceIs to try to provide.
[0019]
[Means for Solving the Problems]
  According to the present invention, a ceramic green molded body having opposed principal surfaces is placed on a table, and a first end surface of the ceramic green molded body is brought into contact with a positioning reference block rising from one end of the table. Positioning the green molded body, and cutting the ceramic green molded body by push cutting by lowering the cutting blade toward the main surface of the ceramic green molded body. After the cutting step, the ceramic green molded body is sequentially moved from the second end surface side facing the first end surface by moving the table and the cutting blade relatively after the cutting step. Cutting the green ceramic body with a moving process in a cut stateFirst to the lawIn order to solve the above technical problem, the present invention is characterized by having the following configuration.
[0020]
That is, the cutting step is performed while exerting each pressing force by the front-side pressing body and the rear-side pressing body respectively arranged on the front side and the rear side in the traveling direction of the cutting blade toward the main surface of the ceramic green molded body. Is done. And, the pressing force by the front side pressing body and the pressing force by the rear side pressing body are controlled so that the stress generated in the ceramic green molded body in the cutting process is balanced between the front side and the rear side of the cutting blade. It is a feature.
[0021]
In the present invention, typically, as the cutting line formed by the cutting process approaches the positioning reference block, the pressing force by the rear side pressing body is controlled to be larger than the pressing force by the front side pressing body.
[0022]
In the above case, it is preferable that the pressing force by the rear side pressing body is controlled to be larger than the pressing force by the front side pressing body based on a predetermined program.
[0023]
Further, while sensing the state of the cutting line formed by the cutting process, the pressing force by the front side pressing body and the pressing force by the rear side pressing body are adjusted so that the state of the cutting line in the next cutting process becomes appropriate. May be controlled.
[0024]
In this invention, after finishing the cutting process, in the process of raising the cutting blade, the state in which each pressing force by the front side pressing body and the rear side pressing body is exerted toward the main surface of the ceramic green molded body is maintained. It is preferable.
[0025]
  Moreover, it is preferable that the front side pressing body and the rear side pressing body are arranged so as to contact the front surface and the rear surface of the cutting blade, respectively.
  The present invention is also directed to a cutting apparatus used in the above-described method for cutting a ceramic green molded body.
  A cutting apparatus for a ceramic green molded body according to the present invention is provided with a table on which a ceramic green molded body having opposed main surfaces is placed, and a first end surface of the ceramic green molded body provided so as to rise from one end of the table. The ceramic green molded body is positioned by contacting the positioning reference block, the ceramic green molded body is lowered toward the main surface of the ceramic green molded body, and the ceramic green molded body is cut by press cutting, and the ceramic green molded body A driving source that moves the table and the cutting blade relatively in the cutting progress direction so that the body is sequentially cut from the second end face side facing the first end face; It is arranged on the front side in the cutting progress direction and exerts a pressing force toward the main surface of the ceramic green molded body A front-side pressing member is disposed on the rear side in the cutting direction of the cutting blade, it exerts a pressing force toward the main surface of the ceramic green compact, and a rear side press body.
  Then, the pressing force by the front-side pressing body and the pressing force by the rear-side pressing body are controlled so that the stress generated in the ceramic green molded body in the cutting by the cutting blade is balanced between the front side and the rear side of the cutting blade. It is characterized by that.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view showing a main part of a cutting device 21 used for carrying out a cutting method according to an embodiment of the present invention.
[0027]
The cutting device 21 includes a table 22. On this table 22, a ceramic green molded body 25 having opposed main surfaces 23 and 24 is placed. A positioning reference block 26 is provided so as to rise from one end of the table 22. The first end surface 27 of the ceramic green molded body 25 is in contact with the positioning reference block 26. In this way, the ceramic green molded body 25 is positioned on the table 22.
[0028]
Although not shown, the table 22 is provided with a number of suction ports that apply a negative pressure to the ceramic green molded body 25 through a breathable underlay sheet made of paper or resin. The ceramic green molded body 25 may be configured to be more reliably positioned with respect to the table 22 by the negative pressure.
[0029]
A cutting blade 28 is disposed so as to face the table 22 via the ceramic green molded body 25. The cutting blade 28 is held by a holder 29, and the holder 29 is attached to the base member 30. The base member 30 is configured to move in the vertical direction by a drive source (not shown), so that the cutting blade 28 can move in the downward and upward directions as indicated by the double arrow 31. Configured. When the cutting blade 28 descends toward the main surface 23 of the ceramic green molded body 25, the ceramic green molded body 25 is cut by pressing as shown in FIG. 2, and a cutting line 32 is formed there.
[0030]
The table 22 and the cutting blade 28 are configured so as to be relatively movable in the direction indicated by the double arrow 33 by a drive source (not shown). In this case, the position of the cutting blade 28 is fixed and the position of the table 22 is often configured to be movable. Instead, the position of the table 22 is fixed and the position of the cutting blade 28 is movable. Alternatively, the positions of both the table 22 and the cutting blade 28 may be configured to be movable. When the table 22 is configured to be movable, the positioning reference block 26 is also configured to move with the table 22.
[0031]
Due to the relative movement described above, the cutting by the cutting blade 28 proceeds in the cutting progress direction 34 indicated by the arrow in FIG. A front side pressing body 35 and a rear side pressing body 36 are disposed on the front side and the rear side in the cutting progress direction 34 of the cutting blade 28, respectively.
[0032]
The front-side pressing body 35 and the rear-side pressing body 36 are attached to the ends of the piston rods 39 and 40 of the cylinders 37 and 38 fixed to the base member 30, respectively. Therefore, the front-side pressing body 35 and the rear-side pressing body 36 can move in the direction indicated by the double arrow 31 independently of the cutting blade 28, and the front-side pressing body 35 and the rear-side pressing body 36. Are movable independently of each other. The front-side pressing body 35 and the rear-side pressing body 36 act so as to exert a desired pressing force toward the main surface 23 of the ceramic green molded body 25 by driving the cylinders 37 and 38, respectively.
[0033]
FIG. 2 shows a state in which the cutting device 21 is performing a cutting process and a moving process.
[0034]
First, the ceramic green molded body 25 is positioned on the table 22 as described above.
[0035]
Next, the cutting blade 28 is lowered toward the main surface 23 of the ceramic green molded body 25 to cut the ceramic green molded body 25 by push cutting. After this cutting process, the table 22 and the cutting blade 28 are cut. And moving the ceramic green molded body 25 in a state of being sequentially cut along a plurality of cutting lines 32 from the second end face 41 side facing the first end face 27. Are repeated several times alternately.
[0036]
Since the cutting process and the moving process are alternately performed as described above, the relative movement between the table 22 and the cutting blade 28 is caused to occur in association with the reciprocating movement of the cutting blade 28 in the downward and upward directions. It is configured. In other words, the table 22 and the cutting blade 28 are relatively moved with a predetermined pitch after each operation of lowering and raising the cutting blade 28 is completed once.
[0037]
Further, in the cutting step, the front-side pressing body 35 and the rear-side pressing body 36 are in contact with the main surface 23 of the ceramic green molded body 25, and the pressing forces by the front-side pressing body 35 and the rear-side pressing body 36 are ceramic. The green molded body 25 is in a state of extending toward the main surface 23.
[0038]
In this case, the lowering and raising operations of the cutting blade 28 are given by the vertical movement of the base member 30, but the front side pressing body 35 and the rear side pressing body 36 are in contact with the main surface 23 of the ceramic green molded body 25. The cylinders 37 and 38 are driven so that the cutting blade 28 can be lowered. In other words, even after the front-side pressing body 35 and the rear-side pressing body 36 are in contact with the main surface 23, the cutting blade 28 is further maintained while the front-side pressing body 35 and the rear-side pressing body 36 maintain the state. The operation of the cylinders 37 and 38 is controlled so that it can be lowered.
[0039]
Further, the pressing force by the front side pressing body 35 and the pressing force by the rear side pressing body 36 are controlled so that the stress generated in the ceramic green molded body 25 in the cutting process is balanced between the front side and the rear side of the cutting blade 28. Is done. Referring to FIG. 6 described above, the stresses F1 and F2 as reaction forces when the ceramic green molded body 1 is elastically or plastically deformed by the entry of the cutting blade 7 and the reaction force F3 from the positioning reference block 5 are described. , The pressing force by the front-side pressing body 35 and the pressing force by the rear-side pressing body 36 are controlled so that F1 = F2 + F3.
[0040]
More specifically, as the cutting line 32 formed by the cutting process approaches the positioning reference block 26, the pressing force by the rear side pressing body 36 is controlled to be larger than the pressing force by the front side pressing body 35.
[0041]
An example of the control mode of these pressing forces is shown in FIG. In FIG. 3, the vertical axis indicates the pressing force, and the horizontal axis indicates the cutting position. Regarding the cutting position indicated on the horizontal axis, “cutting start” indicates the cutting position closest to the second end surface 41 of the ceramic green molded body 25, and “cutting end” indicates the first end surface 27 of the ceramic green molded body 25. The cutting position closest to is shown. Further, in the curve indicating the pressing force, those with “front” indicate the pressing force by the front-side pressing body 35, and those with “rear” indicate the pressing force by the rear-side pressing body 36. .
[0042]
As shown in FIG. 3, until the cutting position reaches about 1/3 of the dimension in the cutting progress direction 34 of the ceramic green molded body 35, the pressing force by the front side pressing body 35 and the rear side pressing The pressing force by the pressure 36 is made equal to each other. Next, since the cutting position exceeds about 1/3 of the dimension in the cutting progress direction 34 of the ceramic green molded body 25, the pressing force by the rear side pressing body 36 is larger than the pressing force by the front side pressing body 35. The difference between these pressing forces is controlled to gradually increase until the end of cutting.
[0043]
The increase in the pressing force by the rear surface side pressing body 36 as described above causes an increase in the stress F1 (see FIG. 6) generated on the rear surface side of the cutting blade 28. Therefore, even if the uncut portion of the ceramic green molded body 25 becomes smaller and the reaction force F3 (see FIG. 6) from the positioning reference block 26 becomes larger, the stress generated in the ceramic green molded body 25 is reduced by the cutting blade. The front side and the rear side of 28 can be balanced. Therefore, it is possible to substantially prevent the oblique cutting state as shown in FIG.
[0044]
The control mode of the pressing force as shown in FIG. 3 is determined according to the design of the ceramic green molded body 25 to be cut. However, when the ceramic green molded body 25 having the same design is subjected to the cutting process. In terms of mass productivity, it is preferable to control the pressing force based on a predetermined program.
[0045]
Moreover, the control mode of the pressing force shown in FIG. 3 is only an example. For example, even if control is performed so that only the pressing force by the rear surface side pressing body 36 is increased while the pressing force by the front surface side pressing body 35 is constant, the pressing force by the rear surface side pressing body 36 is reduced from the start of cutting. The pressing force by the front side pressing body 35 may be larger. Also, the time point (cutting position) at which the pressing force is increased or decreased can be variously changed.
[0046]
As described above, cutting is performed over the entire area of the ceramic green molded body 25, and after the ceramic green molded body 25 is cut into a strip shape, the table 22 and the cutting blade 28 are normally rotated by 90 degrees. The same cutting process and moving process as described above are performed from one end side of the ceramic green molded body 25 cut into strips.
[0047]
Thus, when cutting is completed, the ceramic green molded body 25 is divided into molded bodies having a plurality of chip shapes. These chip-shaped molded bodies are then fired, and external electrodes are baked to produce a ceramic electronic component such as a multilayer ceramic capacitor. In the case of a multilayer ceramic electronic component such as a multilayer ceramic capacitor, the ceramic green molded body 25 is composed of a multilayer body of a plurality of ceramic green sheets in which an internal conductor film is formed along a specific interface. The green molded body 25 is not necessarily a laminated body.
[0048]
As shown in the drawing, the front side pressing body 35 and the rear side pressing body 36 are preferably arranged so as to contact the front surface and the rear surface of the cutting blade 28, respectively. Thereby, the effect | action which regulates the operation | movement direction of the cutting blade 28 by the front side press body 35 and the rear surface side press body 36 can be heightened, and it can make it difficult to produce a diagonal cutting state more.
[0049]
After finishing the cutting process, before entering the moving process, a process of raising the cutting blade 28 is performed. In the process of raising the cutting blade 28, each of the front-side pressing body 35 and the rear-side pressing body 36 It is preferable that the state in which the pressing force is exerted toward the main surface 23 of the ceramic green molded body 25 is maintained. Further, the pressure exerted at this time may not be the same as the pressure at the time of cutting. Such an operation is realized by controlling the driving of the cylinders 37 and 38.
[0050]
According to the preferred embodiment described above, it is possible to reliably prevent the ceramic green molded body 25 from being lifted from the table 22 as the cutting blade 28 is raised. Therefore, the rising speed of the cutting blade 28 can be increased, and the switching time from the cutting process to the moving process can be shortened. As a result, the ceramic green molded body 25 can be cut more quickly and stably.
[0051]
In the embodiment described above, the pressing force by the rear side pressing body 36 is controlled to be larger than the pressing force by the front side pressing body 35 based on a predetermined program. As described with reference to FIG. 5, while sensing the state of the cutting line 32 formed by repeating the cutting process and the moving process, the state of the cutting line 32 in the next cutting process is made appropriate. The pressing force by the front side pressing body 35 and the pressing force by the rear side pressing body 36 may be controlled.
[0052]
FIG. 4 is a block diagram showing the configuration of the feedback control device 42 for performing the above-described control. FIG. 5 is a block diagram showing a configuration of the oblique cutting amount measuring device 43 shown in FIG.
[0053]
First, referring to FIG. 5, the oblique cutting amount measuring device 43 is for measuring the oblique cutting amount A shown in FIG. 7, and includes a camera 44 for sensing the state of the cutting line 32. . An image captured by the camera 44 is processed by the image processing device 45. Further, the cutting timing detection device 46 outputs a measurement timing signal 47 immediately after finishing the raising of the cutting blade 28, for example, and at the timing when the measurement timing signal 47 is input, the image processing device 45 causes the oblique cutting amount A to be cut. A feedback signal 48 corresponding to is output. The feedback signal 48 is illustrated as an output signal of the oblique cutting amount measuring device 43 in FIG.
[0054]
Referring to FIG. 4, at the addition point 49 provided in the feedback control device 32, the feedback signal 48 described above is compared with the reference input signal 50 indicating that the oblique cutting amount A = 0 as the target value. Based on the comparison, an error signal 51 is derived. The error signal 51 is input to the sequencer 52, and the sequencer 52 performs arithmetic processing for correcting the pressing force by the front side pressing body 35 and the pressing force by the rear side pressing body 36 in the next cutting step. Then, a pressure control signal 53 based on the calculation processing result is output from the sequencer 52. The pressure control signal 53 is input to the pressing force control device 54, whereby the driving mode of each of the cylinders 37 and 38 is controlled. As a result, the oblique cutting amount A is taken out as a control amount, and this oblique cutting amount A is again measured by the oblique cutting amount measuring device 43.
[0055]
Thus, while sensing the actual state of the cutting line 32, the pressing force by each of the front-side pressing body 35 and the rear-side pressing body 36 so that the state of the cutting line 32 in the next cutting process is appropriate. If this is controlled, more accurate control can be achieved, and it is possible to quickly respond to a design change of the ceramic green molded body 25 to be handled, and to cope with fluctuations in the pressurization accuracy of the cutting blade 28. Can also respond appropriately.
[0056]
【The invention's effect】
As described above, according to the cutting method and the cutting device of the ceramic green molded body according to the present invention, the front-side pressing body and the rear-side pressing body respectively disposed on the front side and the rear side in the cutting progress direction of the cutting blade. The cutting process is performed while exerting each pressing force on the main surface of the ceramic green molded body, and the pressing force by the front side pressing body and the pressing force by the rear side pressing body are reduced in the cutting process. Is controlled so as to balance the stress generated on the front side and the rear side of the cutting blade. Therefore, the cutting process and the moving process are repeated with the first end surface of the ceramic green molded body in contact with the positioning reference block, and the ceramic green molded body is sequentially cut from the second end surface side. Even when the cutting method is performed, stable cutting can be performed while preventing an oblique cutting state regardless of the cutting position.
[0057]
Therefore, when the ceramic green molded body is a laminated body of a plurality of ceramic green sheets in which the inner conductor film is formed along a specific interface, the inner conductor film is prevented from being displaced or undesirably deformed. It is possible to prevent the inconvenience that the internal conductor film is exposed at an undesired location and the inconvenience that the internal conductor film is not exposed at a location that requires exposure.
[0058]
In this invention, as the cutting line formed by the cutting process approaches the positioning reference block, if the pressing force by the rear side pressing body is controlled to be larger than the pressing force by the front side pressing body, the above-mentioned can be achieved by simple control. As described above, it is possible to control so that the stress is balanced between the front side and the rear side of the cutting blade.
[0059]
In the above-described case, when the pressing force by the rear side pressing body is controlled to be larger than the pressing force by the front side pressing body based on a predetermined program, the ceramic green molded body having the same design is excellent. It can be subjected to a cutting process with mass productivity.
[0060]
In this invention, while sensing the state of the cutting line formed by the cutting process, the pressing force by the front-side pressing body and the pressing force by the rear-side pressing body are adjusted so that the state of the cutting line in the next cutting process is appropriate. When the pressure is controlled, more precise control becomes possible, and it is possible to respond quickly to changes in the design of the ceramic green molded body to be handled, and to cope with fluctuations in the press blade pressure accuracy. It can respond appropriately.
[0061]
After finishing the cutting process, in the process of raising the cutting blade, when the state where each pressing force by the front side pressing body and the rear side pressing body is exerted toward the main surface of the ceramic green molded body is maintained, the cutting is performed. Even if the rising speed of the blade is increased, it is possible to reliably prevent the ceramic green molded body from floating from the table as the cutting blade is raised. Therefore, the switching time from the cutting process to the moving process can be shortened, and cutting can be performed at higher speed and more stably.
[0062]
When the front-side pressing body and the rear-side pressing body are arranged so as to contact the front surface and the rear surface of the cutting blade, respectively, the action of regulating the operation direction of the cutting blade by the front-side pressing body and the rear-side pressing body is enhanced. Accordingly, the oblique cutting state can be prevented more reliably.
[Brief description of the drawings]
FIG. 1 is a front view showing a main part of a cutting device 21 used for carrying out a cutting method according to an embodiment of the present invention.
FIG. 2 is a front view showing a state in which a cutting process and a moving process are performed by the cutting device 21 shown in FIG. 1;
3 is a view showing a preferable example of the relationship between the pressing force exerted by each of the front-side pressing body 35 and the rear-side pressing body 36 shown in FIG. 2 and the cutting position. FIG.
FIG. 4 is a diagram for explaining another embodiment of the present invention, and shows the configuration of a feedback control device 42 for controlling the pressing force exerted by the front side pressing body 35 and the rear side pressing body 36; It is a block diagram.
5 is a block diagram showing a configuration of the oblique cutting amount measuring device 43 shown in FIG.
FIG. 6 is a front view illustrating a state in which a step of cutting a ceramic green molded body 1 is performed for explaining a conventional technique that is interesting to the present invention.
FIG. 7 is a front view showing a ceramic green molded body 1 in an obliquely cut state for explaining the problem to be solved by the present invention.
[Explanation of symbols]
21 Cutting device
22 tables
23, 24 Main surface
25 Ceramic green compact
26 Positioning reference block
27 First end face
28 cutting blade
34 Cutting direction
35 Front pressure body
36 Rear side pressing body
37, 38 cylinders
41 Second end face
42 Feedback control device
43 Oblique cutting amount measuring device
44 cameras
45 Image processing device
48 Feedback signal
52 Sequencer
53 Pressure control signal
54 Pressure control device
F1, F2 Stress due to cutting blade approach
Reaction force from F3 positioning reference block
A Oblique cutting amount

Claims (7)

A ceramic green molded body having opposed main surfaces is placed on a table, and a first end surface of the ceramic green molded body is brought into contact with a positioning reference block rising from one end portion of the table, whereby the ceramic green Positioning step for positioning the molded body;
Cutting the ceramic green molded body by press cutting by lowering a cutting blade toward the main surface of the ceramic green molded body; and
It is repeatedly performed a plurality of times alternately with the cutting step, and after the cutting step, the table and the cutting blade are relatively moved to move the ceramic green molded body to the first A cutting method for a ceramic green molded body, comprising a moving step, which is sequentially cut from the second end face side facing the end face,
The cutting step exerts each pressing force by the front-side pressing body and the rear-side pressing body respectively arranged on the front side and the rear side in the cutting progress direction of the cutting blade toward the main surface of the ceramic green molded body. Implemented,
The pressing force by the front side pressing body and the pressing force by the rear side pressing body are controlled so that the stress generated in the ceramic green molded body in the cutting step is balanced between the front side and the rear side of the cutting blade. A method for cutting a ceramic green molded body. 2. The control according to claim 1, wherein a pressing force by the rear side pressing body is controlled to be larger than a pressing force by the front side pressing body as a cutting line formed by the cutting step approaches the positioning reference block. Cutting method of ceramic green molded body. The method for cutting a ceramic green molded body according to claim 2, wherein the pressing force by the rear surface side pressing body is controlled to be larger than the pressing force by the front surface side pressing body based on a predetermined program. While sensing the state of the cutting line formed by the cutting step, so that the state of the cutting line in the next cutting step becomes appropriate, the pressing force by the front side pressing body and the rear side pressing body The method for cutting a ceramic green molded body according to claim 1, wherein the pressing force is controlled. After finishing the cutting step, in the process of raising the cutting blade, the state in which each pressing force by the front side pressing body and the rear side pressing body is exerted toward the main surface of the ceramic green molded body is maintained. The method for cutting a ceramic green molded body according to any one of claims 1 to 4. The method for cutting a ceramic green molded body according to any one of claims 1 to 5, wherein the front-side pressing body and the rear-side pressing body are disposed so as to contact the front surface and the rear surface of the cutting blade, respectively. A table on which a ceramic green molded body having opposed principal surfaces is placed;
A positioning reference block that is provided so as to rise from one end of the table and positions the ceramic green molded body by contacting the first end surface of the ceramic green molded body;
A cutting blade that descends toward the main surface of the ceramic green molded body and cuts the ceramic green molded body by push cutting;
Moving the table and the cutting blade relative to each other in the cutting progress direction so as to sequentially cut the ceramic green molded body from the second end face facing the first end face; A driving source;
A front-side pressing body that is disposed on the front side in the cutting progress direction of the cutting blade and exerts a pressing force toward the main surface of the ceramic green molded body;
A rear-side pressing body that is disposed on the rear side in the cutting progress direction of the cutting blade and exerts a pressing force toward the main surface of the ceramic green molded body;
With
The pressing force by the front-side pressing body and the pressing force by the rear-side pressing body are such that the stress generated in the ceramic green molded body in the cutting by the cutting blade is balanced between the front side and the rear side of the cutting blade. A ceramic green molded body cutting device characterized by being controlled .

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