JPS625762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a back edge of a planer blade in a super-finishing planer machine in which the planer blade moves between a cutting position and another polishing position.

In a conventional super-finishing planer machine in which a planer blade is fixed at the blade position, as shown in FIG.
Screw the Nikanna blade 3 and the back blade 4 parallel to each other with the screw 6.
It is installed with. In the figure, 7 is a material feeding device. If the sharpness of the planer blade 3 on such a super-finished planer board decreases, use another polished planer blade 3.
and is replaced with the holding part 5 to which the back blade 4 is attached. However, in general, the total cutting length of the planer blade of this type of super-finishing planer to obtain a good finished surface after polishing is about 50 m. This means that the planer blade must be replaced very frequently. It is necessary to stop the machine to replace the planer blade, and doing this frequently can be difficult to incorporate into the production line, and the finished surface of the planer blade immediately after polishing may differ from the finished surface after a certain amount of use. This caused problems such as uneven finishing of the workpiece. Therefore, the inventor of the present application has proposed an extremely efficient super-finishing planer that can maintain good sharpness by using the planer blade for super-finishing cutting while being attached to the super-finishing planer and also re-sharpening it.

The super-finishing planer has a planer blade that is held in a cutting state at the cutting edge position of the table and is movable in the width direction of the blade, and the planer blade is polished at a moving position away from the blade edge position. It is configured to do this. Since the planer blade has a movable structure, a metal plate that is relatively easy to sharpen is glued to the back of the planer blade, and the back blade is also scraped by the amount that the planer blade is polished. Ta. It has been found that adhesion of such a back blade to a planer blade is very troublesome, and it is also expensive. It was also found that the planer blade could be damaged when the back blade was scraped off.

This invention solves the above problem by improving the back edge of the planer blade in a super-finishing planer that is configured to use the planer blade for super-finish cutting while being attached to the super-finishing planer and also perform regrinding. This is the purpose.

The main feature of this invention is that in the above-mentioned super-finishing planer, the back blade is in pressure contact with the cutting edge of the planer blade at a position close to the cutting edge on the back side of the planer blade at the cutting edge position. The reason is that it is held on the fixed side of the planer board so as to form a predetermined angle.

With this configuration, there is no need to glue the back blade to the planer blade, and there is no need to remove the polished portion of the planer blade. There is no need to scrape it off, so there is no need to worry about damaging the planer blade. The fact that the planer blade and the back blade form a predetermined angle means that the action of planer debris generated during cutting presses the back blade against the planer blade. Therefore, the degree of adhesion of the tip of the back blade to the planer blade is automatically increased, so the tip of the back blade does not float up from the back surface of the planer blade, and planer debris gets between the planer blade and the back blade. This will be prevented. As a result, even if the back blade is held on the fixed side with respect to the moving planer blade, good cutting is always performed. Moreover, this means that the pressing force from the back blade side that is brought into pressurized contact with the planer blade does not have to be so large, which also has the effect that the movement resistance of the planer blade does not increase unnecessarily. Furthermore, by making it possible to slightly adjust the holding state of this back blade in the direction of the cutting edge along the back surface of the planer, the back blade position can be adjusted according to the finishing allowance, that is, the thickness of the planer scraps. This allows for good cutting.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 2 and 3 schematically show the configuration of a superfinishing planer, including a table 10, a material feeding device 11, a planer blade 12, a planer blade holder 13, and a reciprocating drive device 1.
4, a polishing device 15, etc.

The table 10 has a cutting edge 20. The blade opening 20 is open over the entire width of the table 10 so that the cutting edge of the planer blade 12 protrudes from the top surface of the table. A planer blade holding portion 13, which will be described later, is provided below the blade mouth 20. 10 in the diagram
A is a table main body, and 10b is an auxiliary table, both of which are formed integrally with the table 10.

The material feeding device 11 is composed of a running endless rubber belt that faces the upper surface of the table 10, similar to a normal superfinishing planer.

The planer blade 12 is elongated in the blade width direction, and its length is slightly longer than twice the width of the blade mouth 20.

The planer blade holder 13 is composed of a fixed base 22, a first movable base 23, a second movable base 24, etc. is mounted so as to be movable along an inclination, and a second movable base 24 on which the planer blade 12 is attached is mounted on the first movable base 23 so as to be movable back and forth from side to side along the blade opening 20. The first movable base 23 is moved by a lifting drive device 26, and the second movable base 24 is reciprocated by a reciprocating drive device 14. Planer blade 1
2 is fixed at its rear end to the second movable base 24 with a screw 41, but as shown in FIG. It is slidably held between a support beam 44 on a support portion 43 extending downward from the auxiliary table 10b. In the same figure, 45
is fixed to the cutting edge 42 with a wear-resistant receiving plate. Reference numeral 46 denotes a wear-resistant plate, and 47 denotes a pressing plate, both of which are fixed together and attached to the support beam 44, and are pressed against the planer blade 12 by a spring or an air pressurizing device (not shown). The planer blade 12 held by the planer blade holder 13 in this manner can reciprocate in the left-right direction along the blade mouth 20 and can also move up and down along the slope, but to the extent that it does not interfere with super-finish cutting. He is restrained by the blade and is positioned at the edge of the blade.

The reciprocating drive device 14 includes a feed screw 34 whose both ends are supported on the lower surface of the auxiliary table 10b, a nut 35 screwed onto the feed screw 34, a reciprocating drive arm 33 integrally formed with the nut 35, and a feed It is composed of a motor 38 and the like for driving the screw to rotate in forward and reverse directions. With this configuration, the planer blade 12 attached to the second movable base 24 moves back and forth.

The polishing devices 15 are provided at fixed positions on the auxiliary table 10b close to both outside positions of the blade mouth 20, and the grinding wheel 39 rotates at that position to polish the moving planer blade 12. It's getting old.

A back blade 50 as shown in FIG. 6 is provided for the planer blade 12 in the superfinish planer machine configured in this manner. The back blade 50 is a steel plate heat-treated to a hardness that does not damage the planer blade 12, and is formed to have a width corresponding to the width of the table 10. In the same figure, 50a is a cutting edge, 51 is a mounting screw insertion hole, 52 is a notch for arranging a pressure spring, and 5
3 is a pressure spring engagement hole. As shown in FIGS. 4 and 5, this back blade 50 is attached to a support shaft 54 together with a pressure spring 55 with a screw 56, and both ends of the support shaft 54 are connected to the support portion 43 through bearing blocks 57. is supported by

The support shaft 54 is formed to be longer than the width of the back blade 50 by a portion 58 that fits into the bearing blocks 57 at both ends, and a part of the circumferential surface is cut out to form a flat surface between the both end portions 58 as shown in the figure. 59, and the base end portion of the back blade 50 is attached to the flat surface 59 with a screw 56.

The pressure spring 55 is a coil spring, and has engaging portions 60 and 61 formed by linearly extending spring wire rods at both ends in a tangential direction. Notch 5 of back blade 50
The pressure springs 55 are each held at a predetermined position by fitting the coil inner hole into the position of the support shaft 54 corresponding to the position 2 and attaching the back blade 50. When assembled to the planer board as shown in the figure, the engaging part 60 engages with the support beam 44, and the engaging part 61 has its tip bent and engages with the pressure spring engaging hole 53. ing. In this state, the pressure spring 55 is elastically strained, and its reaction force causes the pressure action in the counterclockwise direction in FIG.
It is given to 0. Therefore, the back blade 50 is the cutting edge 50
a is brought into pressure contact with the back surface of the planer blade 12.

The bearing block 57 is rotatably fitted to both end portions 58 of the support shaft 54, and is held parallel to the back surface of the planer blade 12 in a bearing block holding portion 62 formed inside both support portions 43. cutting edge 1
It is held movably adjustable only in the direction perpendicular to 2a. 62a and 62b in FIG. 5 are block holding grooves. Bolts 63, 64 and lock nuts 65, 66 are provided to restrict movement of the bearing block 57 in the front and back. The bolt 63 is provided on a member 67 fixed to the support portion 63, and the bolt 64 is provided on the support beam 44.

The cutting edge shape, mounting angle, etc. of the above-mentioned back blade 50 are as shown in FIG. In the figure, θ ₁ is the mounting angle of the planer blade 12 with respect to the table top surface, which is approximately 35°, θ ₂ is the mounting angle with respect to the planer blade 12, which is approximately 35°, and θ ₃ is the minute cut portion 68 of the cutting edge of the back blade 50. The angle with respect to the planer blade 12 is approximately
It is 60°. Furthermore, the dimension d ₁ of the minute cut portion 68 is approximately
It is 0.5mm. In addition, d ₂ in the figure corresponds to the cutting allowance,
In other words, it is a dimension that is adjusted according to the thickness of the planer scraps, and is adjusted to be large when the thickness of the planer scraps is large, and adjusted to be small when the thickness of the planer scraps is small.

The super-finishing planer equipped with the back blade 50 configured as described above is similar to the conventional super-finishing planer of this kind, by feeding the wood along the upper surface of the table 10 using the material feeding device 11. Planer blade 12
Cut with. The planer blade 12 is reciprocated left and right by the reciprocating drive device 14, and with the grindstone 39 rotating at an appropriately adjusted position, the planer blade 12 is slightly raised by the lifting drive device 26. , the planer blade 12 is polished. Back blade 50
The planer blade 12 always remains in a fixed position and does not move, but when the planer blade 12 cuts wood, it is slightly bent due to the cutting resistance, but the shape roughly follows the bending. This is because the back blade is formed relatively thin and is pressed into contact with the planer blade 12 at an angle _θ2 . This prevents planer debris from entering between the planer blade 12 and the back blade 50, and there is no hindrance to the movement of the planer blade 12 at all. In addition, the position of the cutting edge of the back blade 50 can be adjusted according to the thickness of the planer waste by using bolts 63 and 6.
4. Operate the lock nuts 65 and 66 to lock the bearing block 5 along the block holding grooves 62a and 62b.
This is possible by adjusting the movement of 7. In this adjustment, the back blade 50 is moved in and out parallel to the back surface of the planer blade 12, so the angle _θ3 does not change at all.

Therefore, the back blade 50 of the planer blade in this super-finishing planer does not have a structure in which it adheres to the moving planer blade 12, but instead performs its original role, that is, prevents hangnails caused by the cutting edge 12a biting into the wood too much. It can definitely be done. This makes the production of the movable planer blade and its back blade extremely easy and at low cost. Further, the adjustment of the position of the cutting edge of the back blade 50 does not involve cutting and can be taken in and out as it is, so there is no wear and tear, which is extremely convenient, and there is no risk of damaging the planer blade 12.

In the above embodiment, the bolts 63 and 64 and the lock nut 6 are used as the adjustment structure for the position of the cutting edge of the back blade 50.
5 and 66 have been described, but in addition to this, for example, the bolt 64 side may be supported via a strong spring, and the bolt 63 side may be left as is or have a cam pressing structure, so that adjustment can be performed with only one side. Alternatively, a feed screw may be provided separately for the bearing block 57.

As described above, according to the present invention, it is possible to provide an improved back blade that is extremely suitable for a moving planer blade.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional side view showing the general structure of a conventional super-finishing planer, Fig. 2 is a schematic side view of a super-finishing planing machine according to an embodiment of the present invention, and Fig. 3 is a partially cutaway plan view of the same. Fig. 4 is an enlarged cross-sectional view taken along line A-A in Fig. 3, Fig. 5 is a partially cutaway view taken in the direction of the arrow B-B in Fig. 4, and Fig. 6 is a partially omitted enlarged view of the back blade of the same example. 7 are partially enlarged side views showing the attachment relationship between the planer blade and the back blade in the same embodiment. 10... table, 10a... table body,
10b... Auxiliary table, 11... Material feeding device, 1
2...Planer blade, 13...Planer blade holding part, 14
... Reciprocating drive device, 15 ... Polishing device, 20 ...
Blade mouth, 43... Support part, 44... Support beam, 47...
...Press plate, 50...Back blade, 50a...Blade tip, 54
... Support shaft, 55 ... Pressure spring, 57 ... Bearing block, 62 ... Bearing block holding part.

Claims (1)

[Claims] 1. A planer blade that is held in a state capable of cutting at a cutting edge position of the table is provided so as to be movable in the width direction of the blade, and the planer blade is polished at a moving position away from the blade edge position. In a super-finishing planer having a configuration of The back edge of a planer blade held in. 2. The back blade of a planer blade in a super-finishing planer machine according to claim 1, wherein the holding state of the back blade can be finely adjusted in the front-rear direction along the back surface of the planer blade.