JP2528587B2 - Machining method of knife holder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden knife holder for holding a knife for sheet processing of a long thin plate , and has a long groove shape.
The present invention relates to a processing method for forming the knife fitting groove .

[0002]

BACKGROUND OF THE INVENTION For example, a knife of this kind is used for punching a sheet of paper, plastic, corrugated board or the like into a predetermined shape by punching press work or for making a crease in it. As shown in FIGS. 3 and 4, the knife A as an example of this has a thin wall (for example, a wall thickness of 0.4 to 1.
0 mm), it has a band shape, has a cutting edge 1, and has a substantially rectangular cross section. Then, the knife A is fitted and fixed in a knife fitting groove 3 which is continuously formed through a wooden and flat knife holding base 2. The knife holder 2 to which the knife A is fixed is composed of a thin iron plate 11 and a paper sheet 1
0 and the back plate 4 are attached to a punching press (not shown) and used for sheet processing. The knife fitting groove 3 has a predetermined shape (shape corresponding to a punching die) previously formed by laser processing.
Formed. In this case, the knife holder 2 is mounted as shown in FIG.
As shown in FIG. 6, each of the plurality of needle-shaped members 13, 13, ...
A laser beam 14 emitted from a laser processing device (not shown) forms knife insertion grooves 3 corresponding to a plurality of cutting dies 15a, 15b, 15c, 15d, for example. The knife fitting groove 3 corresponding to a plurality of cutting dies is formed on the single knife holder 2 as described above in order to increase the efficiency during sheet processing. In the laser processing apparatus, in consideration of the direction of the grain 16 of the knife holder 2, the processing speed, focal length, and
Data relating to the power density is input in advance by the operator's operation, and as a result, the above-mentioned processing speed, focal length, power
-The laser processing device is driven according to the density processing conditions,
A knife fitting groove is formed. However, laser processing
In this case, the knife holder that is the workpiece is burned
Since the IF fitting groove is formed, the knife holder
Depending on how much water contains
The width, depth, etc. of the groove formed changes. Knife stand
In this case, since the material to be processed is natural wood, this question
The problem is more serious than when processing metal or plastic
It Therefore, the present invention was devised in view of the above circumstances.
It is a wooden, flat knife holder with a knife insertion groove.
The water content is calculated from the weight of the knife holder when forming the
Then, the control data such as processing speed is supplemented by this water content.
Correctly, create control data that matches the current moisture content, and
By performing laser processing with
It is intended to secure workability.

[0003]

To achieve the above object of the Invention The means the present invention you employed, it is an gist irradiates a laser beam to the knife holder plate-shaped wooden
Together with moving the irradiation position,
Continuously inserts and fixes a knife for thin sheet processing
For the method of processing the knife holder that forms a special knife insertion groove
And the weight of the knife holder is measured in advance.
Based on the process and the weight measured by the weight measuring means
And a moisture content calculator for calculating the moisture content of the knife holder.
And the water content calculated in the water content calculation step above.
Based on this, processing conditions including the moving speed of the laser light are automatically set.
It is characterized by comprising a condition setting step for setting.
This is a method of processing a knife holder.

[0004]

In the method of processing a knife holder according to the present invention, the water content of the knife holder is calculated from the weight of the knife holder . This included
Correct the control data such as processing speed according to the water rate
The control data suitable for the water content is automatically set and
By performing laser machining, the machinability as designed is confirmed.
Retained.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. The following embodiments are examples of embodying the present invention and are not intended to limit the technical scope of the present invention. Here, FIG. 1 is used for the processing method according to one embodiment of the present invention.
Schematic diagram of a laser processing apparatus capable of bets, FIG 2 is an enlarged view of FIG. As shown in FIGS. 1 and 2, the laser processing apparatus 17 according to this embodiment includes a conventionally known apparatus main body 18 that generates a laser beam 14, a controller 19 that controls the laser processing apparatus 17, and the above-described control. It is configured to include a weight measuring device 20 which is connected to the device 19 and measures the weight of the knife holder 2 and a table 21 which supports the weight measuring device 20. The device body 18
Is the machining speed (X
-Drive control is performed based on the Y direction), the focal length (related to the Z axis direction: the direction perpendicular to the paper surface of FIG. 5), and the power density. A support member 22 for supporting the knife holder 2 is arranged on the upper surface of the weight measuring device 20, and a plurality of needle-shaped members 23, 23, 2 constituting the support member 22 are provided.
Each of the tip portions 23a of 3, ... Is formed in a substantially spherical crown shape, and its surface is mirror-finished. Thus, the needle-shaped member 2
By making the tip end portion 23a of No. 3 have a spherical crown shape, the laser light 14 penetrating the knife holder 2 is allowed to pass through the tip end portion 23a.
Even if the light is irradiated to a, it is possible to avoid the disadvantage that the laser light 14 is diffusely reflected on the surface and the tip portion 23a is melted.

The data relating to the weight of the knife holder 2 measured by the weight measuring device 20 is used as the control device 19
In the controller 19, the water content of the knife holder 2 is calculated based on the data relating to the weight, the volume of the knife holder 2 and the specific gravity of the knife holder 2, which are input in advance. . Based on the water content calculated as described above, the data relating to the processing speed, the focal length, and the power density, which are set in advance for various cutting dies, are automatically corrected. The control device 19 drives and controls the device main body 18 based on various data automatically set as described above, and the knife fitting groove 3 having a predetermined shape is formed in the knife holding base 2. Specifically, with respect to the knife fitting groove 3, the focal length is set based on a predetermined width dimension t set in advance on the surface side of the knife holder 2.
The processing speed is set so that the width dimension d on the back surface side becomes equal to the width dimension t described above. Furthermore, the power density is set in consideration of the overall balance. Then, the machining speed in the machining in the grain direction of the knife holder 2 is increased,
Also, depending on the degree of water content, when it is large, it is delayed, and when it is small, it is accelerated. When the material (wooden flat plate) used for the knife holder 2 has a warp, the width dimensions t and d of the knife fitting groove 3 are changed and the knife fitting groove is appropriately changed to a value corresponding to the warping. It is also possible to control the laser processing apparatus 17 so that the knife holder 2 as a whole can be straightened and its flatness can be ensured with the knife inserted in the blade 3. By performing the above-mentioned processing, it is possible to eliminate the waste of the above-mentioned material and greatly contribute to resource saving. Since the laser processing apparatus 17 according to the present embodiment is configured as described above, various processing conditions (control data) are automatically set when the knife insertion groove 3 is formed in the knife holder 2 and the knife at that time is set. Processing can be performed under processing conditions suitable for the water content of the holding table. Further, although it is out of the technical scope of the present invention , as shown in FIG. 1, the weight calculator 20 is omitted and the knife holder 2 is
For example, an infrared type water content measuring device 24 for directly measuring the water content of the knife holder 2 is arranged in the vicinity of the laser irradiation part 25 of the apparatus main body 18, and the knife holding table 2
It is also possible to directly measure the water content and to set various control data automatically in the control device 19 based on this data.

[0007]

Since the laser processing apparatus according to the present invention is configured as described above , the water content of the knife holder is reduced when the knife fitting groove is formed in the wooden flat knife holder.
You can also perform laser processing under optimal conditions
With the width and depth of the processed groove,
It will be a match, and you can get a precise knife holder.
Can be.

[Brief description of drawings]

FIG. 1 is used for carrying out a processing method according to an embodiment of the present invention.
FIG. 1 is a schematic configuration diagram of a laser processing apparatus that can be installed.

FIG. 2 is an enlarged view of a main part in FIG.

FIG. 3 is a perspective view for explaining the background art of the present invention and showing a state before a knife is attached to the knife holder.

FIG. 4 is a side sectional view of a main part in a state where a knife is mounted on the knife holder.

FIG. 5 is a plan view of a knife holder in which knife fitting grooves corresponding to a plurality of types of cutting dies are formed.

FIG. 6 is an explanatory view when forming a knife fitting groove on the knife holder.

[Explanation of symbols]

 2 ... Knife holder 3 ... Knife insertion groove 17 ... Laser processing device 18 ... Device body 19 ... Control device 20 ... Weight measuring device 24 ... Moisture content measuring device 25 ... Laser irradiation unit

Claims (1)

(57) [Claims] 1. A laser beam is radiated onto a wooden, flat knife holder.
The knife and moving the irradiation position,
Inserting and fixing a long thin plate knife for processing sheets on the holding table
The knife holder to form a continuous knife insertion groove
In the construction method, a weight measuring step for measuring the weight of the knife holder in advance.
And a water content calculating step for calculating the water content of the knife holder based on the weight measured by the weight measuring means, and based on the water content calculated by the water content calculating step
Automatically set processing conditions including the moving speed of the laser light
A knife comprising a condition setting step
How to process the holding table.