JPH0123764Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing thermal deformation of the blade mouthpiece of a finishing planer used in the construction and woodworking industries.

Conventionally, a finishing planer used for finishing wood in the construction and woodworking industries is a material feeder that transfers the material onto a table 3 equipped with a planer blade 1 and a corresponding blade nozzle 2, as shown in Figure 1 of the drawing. Since the material is strongly pressed against the table 3 by the material feeding member 4 and advances, the planer blade 1 and the blade nozzle 2 provided on the table 3 generate heat due to friction with the material. It becomes high temperature and causes thermal distortion. For this reason, even if the protrusion of the cutting edge of the planer blade 1 relative to the blade nozzle 2 is appropriately set at the start of machining so that the desired amount of cutting is performed, thermal distortion between the planer blade 1 and the nozzle 2 may cause The set protrusion of the cutting edge decreases, the amount of cutting gradually decreases, and after about 10 minutes, there are parts that cannot be cut.
Initially, the shavings that came out on average from a full width of the board will now come out in narrow pieces spread over several widths. When this happens, the user assumes that the plane blade 1 is no longer sharp and removes it to sharpen it, but when the plane blade 1 is inspected, it is found that the cutting edge is still sharp and sharp.

Therefore, without sharpening the plane blade 1, I just put it on table 3.
After attaching it to the blade and leaving it for a while, once the hot blade 2 has cooled down, you can shave the material and see what you see.
The material was milled so that a uniform thickness of shavings appeared from the entire width of the material, just as at the beginning of cutting. However, the blade 2
As the temperature increases, the cutting amount gradually decreases, and the cutting pattern becomes uneven, which is the same tendency as before.If the blade 2 is cooled again, it is confirmed that the cutting returns to an average cutting state. Therefore, it was predicted that a constant cutting condition would be maintained until the plane blade 1 could no longer cut.

Based on this prediction, the inventor formed a water passage in the blade nozzle and forcedly cooled the blade nozzle by flowing cooling water through this passage. It has become possible to provide a finishing planer for woodworking that can maintain a constant cutting condition until it stops cutting.

Next, an example of the implementation of the device related to the present invention will be explained based on the drawings.

In FIG. 2 of the drawings, reference numeral 5 denotes a knife stock in a finishing plane machine for woodworking, in which a table 3 having a plane blade 1 and a blade base 2 is provided with a material feeding member 4 opposite to it as shown in FIG. 1 of the drawings. A knife base 2 is attached to the front side of the knife stock 5 in the direction of movement of the material, and a plane blade 1 having a back blade 1' attached to the back side of the knife base 2 is attached to the rear side of the knife base 2.
6, 6 are provided in two lines in the blade base 2, one end of which is opened on one side of the blade base 2, and the other end of the blade base 2.
Connect the water pipe 7 and the drain pipe 8 to the opening side of the water inlets that communicate with each other on the other side, and either supply water from the water pipe 7 and drain it from the drain pipe 8, or enter from the water pipe 7 and drain it. When exiting to pipe 8, there is a cooler (the drawing is omitted)
The cooling water is cooled by the cooling water and circulated back to the water pipe 7, thereby cooling the blade mouthpiece 2 with the cooling water.

In addition, if the above-mentioned water passages 6, 6 are also provided at the attachment part of the plane blade 1 as shown by the chain line in FIG. 3 of the drawing, and cooling water flows through it, the plane blade 1 can also be cooled, and the effect can be further improved. This is something to look forward to.

An example of the implementation of the device according to the present invention is configured as described above, so that the water supply pipe 7 and the drain pipe 8 are connected to the water passages 6, 6 of the blade mouthpiece 2, and the water supply pipe 7 and the drain pipe 8 are connected to the water passages 6,
When cutting is performed by feeding the material onto the table 3 using the material feeding member 4 while circulating cooling water, the material rubs against the upper surface of the blade 2 and generates frictional heat.However, this heat Since the cooling water flowing through the passages 6, 6 takes away the water, the blade 2 is kept at a low temperature and does not suffer from thermal distortion. Therefore, the protrusion of the cutting edge of the planer blade 1 relative to the blade nozzle 2 set at the start of cutting is maintained at the same condition as at the time of setting.
Since the entire width of the material is surely uniformly finished, accurate finishing with excellent flatness can be maintained until the plane blade 1 becomes dull and the cutting surface becomes rough.

As mentioned above, the device according to the present invention has a passageway in the blade nozzle to allow cooling water to flow through it, and the heat generated by friction with the transferred material is absorbed by the cooling water. Even if this is continued, thermal distortion does not occur, and therefore, the protrusion of the plane blade, which is set based on the blade nozzle, does not change. Therefore, the plane blade always scrapes the material uniformly over its entire width, which not only improves the finishing accuracy of the material, but also reduces the number of cuts and increases work efficiency.
Since there is no need to sharpen the plane blade until it becomes dull, it has the unique effect of reducing the effort and time required for sharpening the blade and reducing wear on the plane blade.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional finishing planer for woodworking. Second
The figure is a partially cutaway plan view of a knife stock in a finishing planer for woodworking equipped with the device according to the present invention. FIG. 3 is a longitudinal sectional side view of the same as above. In the diagram, 1 is the plane blade, 2 is the blade nozzle, 3 is the table, and 4
is a material feeding member, and 6, 6 is a water passage.

Claims (1)

[Scope of utility model registration request] In a finishing planer for woodworking, which includes a table equipped with a plane blade and a corresponding blade nozzle, and a material feeding member for transferring material onto the table, a water passage is provided in the blade nozzle, and the water passage is A device for preventing thermal deformation of a blade nozzle in a finishing planer for woodworking, characterized in that cooling water is circulated through the blade.