JPH0116564Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an improvement of the cutting edge of a wood cutting machine used for cutting workpiece materials.

<Prior Art> There are various woodworking cutting machines in which a cutting blade and a cutting edge are arranged opposite each other, such as a super-finishing planer shown in FIGS. 5 and 6.

The planer a moves relatively close to and away from a material feeding surface b (reference surface) and a material feeding frame f to which a material feeding device e is attached, in which a material feeding belt d is stretched between the front and rear rolls c and c. A planer table h is attached to a mounting groove g provided in the center of the material feeding surface b so as to be removable in the width direction, and the planer table h has a cutting allowance. While discharging the
and a cutting edge j are provided in correspondence with each other in the front and rear.

In addition, woodworking cutting machines with opposing cutting blades and cutting edges include Utility Model Publication No. 39-27956, Special Publication No. 47-
35120 or Special Publication No. 54-17995, etc., which have a cutting blade and a cutting edge on the cutting surface (reference surface) of the rotary disk, etc., such as Utility Model Publication No. 57-59282, which has a cutting blade and a cutting edge above the material feeding surface. There are various types such as those equipped with a planer stand.

In a wood cutting machine equipped with such various types of cutting blades and blade openings, the tip of the upper surface of the cutting edge is made of cemented carbide, high-speed steel, etc. in order to achieve a good cutting thickness. It is made of a wear-resistant metal material to prevent so-called abrasion of the tip and maintain surface accuracy. Particularly in the case of a cutting machine, the cutting edge surface is used as a guide surface, and the cutting thickness is determined based on the height relative to the cutting edge, so it is extremely important to maintain the flatness.

<Problems to be solved by the invention> By the way, the surface of the cutting edge becomes high in temperature due to frictional heat as the workpiece x travels under pressure. Even when using a soft material, warping occurred at the cutting edge after 5 or 6 hours of continuous cutting, resulting in poor cutting accuracy. The warp returns to its flat shape by stopping the work and cooling it down, but due to repeated heating and cooling over a long period of time, the cutting edge plastically deforms and loses its flatness, resulting in twisting and twisting.
It remains in a state where distortion etc. occur.

Therefore, the present inventor proposed that by applying a cutting edge plate made of wear-resistant porcelain material such as high alumina or beryllium to the tip of the upper surface of the cutting edge instead of the wear-resistant metal material, the effect of the frictional heat can be reduced. We have learned that this can be reduced.

By the way, the wear-resistant porcelain material has a weak transverse rupture strength, and if the wear-resistant plate is directly held with bolts or the like, it is likely to be damaged. Alternatively, adhesive may be used as a means of not using the bolt, but in such a case,
There is a drawback that the wear-resistant plate cannot be easily replaced.

The purpose of the present invention is to prevent the flatness of the tip of the cutting edge from decreasing due to frictional heat by applying a cutting edge plate made of wear-resistant porcelain material, and to provide an optimal means for fixing the cutting edge plate to the cutting edge. It is something to do.

<Means for solving the problem> The present invention forms a mounting groove extending to the tip of the cutting blade on the upper surface of the cutting edge substrate disposed opposite to the cutting blade, and a mounting state is formed on the mounting groove. A cutting edge plate made of a wear-resistant porcelain material that is flush with the reference surface is arranged, and inclined surfaces that slope down to the side are provided on both sides of the cutting edge plate, and the engagement plate is formed at an equal angle of inclination with the inclined surface. A clamping tool having a retaining slope on the inner lower surface is screwed onto the cutting edge base plate with bolts, and the locking slope is pressed against the inclined surface of the cutting edge plate from above to removably fix the cutting edge plate. This is the cutting edge of a wood cutting machine.

<Function> For example, considering the characteristics of high alumina porcelain material, the material mainly contains aluminum oxide,
Its hardness is 90-96 ( _HRA ) and compressive strength is approximately 14000
Kg/cm ² and has excellent wear resistance. Regarding high-temperature properties, as shown in Figure 4 in comparison with cemented carbide, the hardness of cemented carbide decreases significantly as the temperature rises, but when it comes to high-alumina porcelain materials, has a low reduction slope. This is said to be because high alumina porcelain materials have smaller plastic deformation than cemented carbide. In this way, wear-resistant porcelain materials such as high alumina and beryllium
It can be said that its hardness and compression properties are excellent at high temperatures.

For this reason, the present invention fixes a cutting edge plate made of wear-resistant porcelain material to the tip of the cutting edge substrate, which is constantly placed under high temperature as the workpiece x travels, so that warping at the tip is possible. The flatness of the tip of the blade can be maintained for a long time.

Further, the cutting edge plate is clamped to the cutting edge base plate by bringing the locking slopes of the clamping tool into contact with the slopes formed on both side edges of the cutting edge plate as the clamping tool is tightened and screwed onto the cutting edge base plate side. Therefore, it is possible to avoid direct screw fixation to the cutting edge plate, making it possible to fix the cutting edge plate without causing damage to the cutting edge plate, and to easily replace the cutting edge plate by removing the clamp.

<Example> FIG. 1 shows the application of the present invention to the superfinish planer shown in FIGS. 5 and 6. Reference numeral 1 denotes a planer table, and a cutter mounting surface 2 is provided on the back surface thereof, which is inclined with respect to the upper surface of the planer table 1. Further, on the upper surface thereof, a mounting groove 3 is provided which faces the cutter mounting surface 2 in the running direction by the projection of a mounting projection 4 . A cutting blade 5 is fixed to the blade mounting surface 2 with a bolt 8 with a back blade 6 abutting the outer surface thereof, and the cutting edge of the cutting blade 5 is slightly protruded from the upper surface of the planer table 1. The degree of protrusion of the cutting edge of the cutting blade 5 is adjusted by a push screw 9 supported on the blade mounting surface 2.

A cutting edge substrate 10 having a thickness matching the depth of the groove is mounted on the mounting groove 3, and the mounting projection 4 is mounted on the mounting groove 3.
It is screwed and fixed with a bolt 11 inserted through the hole.

A mounting groove 12 is formed on the top surface of the tip of the blade base plate 10 along the width direction thereof. As shown in FIG. 2, a cutting edge plate 13 made of wear-resistant porcelain material such as high alumina or beryllium is mounted and fixed on the bottom surface of the mounting groove 12, and the upper surface thereof is fixed to the cutting edge plate 13. 10 and are aligned evenly with the top surface. Slanted surfaces 14 that slope down laterally are formed on both side edges of the cutting edge plate 13 .

Reference numeral 15 denotes a base 16 fixed to the upper surface of the mounting groove 12 of the blade base plate 10, and a clamping pressure piece 1 protruding inward.
7, the thickness of which is equal to or less than the thickness of the cutting edge plate 13, and the base 16 has a fitting groove into which the bolt 20 is inserted so that the head thereof does not protrude upward from the upper surface of the base 16. 18 is provided on the lower surface of the clamping pressure piece 17.
A locking slope 19 of equal angles is provided which makes surface contact with the locking surface evenly.

Fixing of the cutting edge plate 13 using the clamping tool 15 will be explained.

First, the locking slope 19 is applied to the slope 14 from above, the clamping tools 15 are arranged on both sides of the cutting edge plate 13, and the bolts 20 are inserted into the fitting grooves 18 to tighten the screws formed on the upper surface of the cutting edge base plate 10. By screwing into the hole 21 and tightening the bolt 20, the locking slope 19 is connected to the slope 14.
press against. As a result, the cutting edge plate 13 is firmly fixed on the mounting groove 12 with its both side edges held by the clamping tools 15.

FIG. 3 shows another means for fixing the cutting edge plate 13.

Here, 25 is a vertically and horizontally protruding piece 26, 2.
7 and has a U-shaped cross section, and the lower surface of the protruding piece 26 at the upper end has the inclined surface 1 of the cutting edge plate 13.
4, and a through hole 29 through which the bolt 30 passes is provided at the center of the side surface thereof. Further, the lower protruding piece 27 has a smaller degree of protrusion than the protruding piece 26.

The clamping tool 25 is arranged on both sides of the blade base plate 10, and the locking slope 28 of the protruding piece 26 is aligned with the mounting groove 12.
The lower protruding piece 27 is brought into contact with the side surface of the blade base plate 10 from above, and the bolt 30 is inserted through the through hole 29 to form a bolt 30 on the side surface of the blade base plate 10. Screw into the screw hole 31. By tightening the bolt 30, the inclined surface 14 is pressed against the locking slope 28, and the cutting edge plate 13 is fixed on the mounting groove 12. Incidentally, upon this fixing, the upper end of the clamping tool 25 should not protrude beyond the upper surface of the cutting edge plate 13.

In addition, when fixing the cutting edge plate 13, the mounting groove 1
By interposing a soft metal plate such as copper or aluminum between the bottom surface 2 and the cutting edge plate 13, damage to the cutting edge plate 13 due to impact from above can be prevented as much as possible.

Regarding the mounting groove 12, the blade mouth board 10
The entire top surface is the reference surface (in the case of a planer, it is the feeding surface)
By forming it lower, the entire upper surface of the cutting edge substrate 10 may be used as the mounting groove 12, and the cutting edge plate 13 may cover the entire upper surface of the cutting edge substrate 10. In this case, the upper surface of the cutting edge plate 13 is at the same height as the reference plane.

<Effects of the invention> As described above, the present invention forms the mounting groove 12 at the tip of the cutting edge substrate 10, and the mounting groove 12 is made of a wear-resistant porcelain material such as high alumina or beryllium. Since the cutting edge plate 13 is mounted and fixed, the cutting edge plate 1
3, even if the cutting edge is constantly placed under high temperature as the workpiece x travels, warpage at the tip is prevented as much as possible, and the flatness of the tip can be maintained for a long time. Therefore, the woodworking machine can be operated for long periods of time, and the cutting accuracy is improved. In addition, the clamping tool 1
The cutting edge plate 13 is held on the mounting groove 12 by pressing the locking slopes 19 and 28 of 5 and 25 against the inclined surface 14 formed on the cutting edge plate 13. There are excellent effects such as the fact that the cutting edge plate 13 can be replaced extremely easily without causing any damage.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, and FIG. 1 is a side view of the planer table 1, FIG. 2 is a sectional view taken along the line A-A in FIG. Fig. 1 is a cross-sectional view taken along line A-A showing the coupling means, Fig. 4 is a graph showing the high temperature characteristics of high alumina porcelain material, Fig. 5 is a side view of super-finish planer a, Fig. 6 is a plan view of the feeding material surface b. 1; Planer stand, 3; Mounting groove, 5; Cutting blade, 1
0; Blade edge board, 12; Mounting groove, 13; Blade edge plate, 1
4; Slanted surface, 15, 25; Clamping tool, 19, 28;
Locking slope, 20, 30; bolt.

Claims (1)

[Scope of utility model registration request] A mounting groove extending to the tip is formed on the upper surface of the cutting edge substrate disposed facing the cutting blade, and is made of a wear-resistant porcelain material that is flush with the reference surface when mounted on the mounting groove. At the same time, a slanted surface is provided on both sides of the slanted surface of the slanted surface of the slanted surface of the slanted surface of the slanted surface of the slanted surface of the slanted surface. A cutting edge for a woodworking cutting machine, characterized in that the cutting edge plate is removably fixed by screwing onto a cutting edge base plate and pressing a locking slope against the inclined surface of the cutting edge plate from above.