JPH0771783B2 - Cutting edge super finishing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for superfinishing a blade edge of a blade after rough grinding when grinding various long blades such as veneer lace and veneer slicer.

[0002]

2. Description of the Related Art Conventionally, the superfinishing of the cutting edge was done by hand with a flat grindstone, but in recent years, the resilience of a spring has been used to push the grindstone against the cutting edge surface and use mechanical means for superfinishing. Attempts have been made to finish it.

[0003]

By using mechanical means, both the time required for super-finishing and the precision of super-finishing can be markedly improved as compared with manual work relying on intuition. However, in the device that utilizes the elastic force of the spring, the pressing force applied to the rotating grindstone by the elastic force of the spring varies, and as a result that the rotating grindstone is constantly vibrated, the grindstone moves in the longitudinal direction of the cutting edge surface. On the other hand, it has a drawback that it bounces finely and damages the cutting edge.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a horizontally long bed in which a blade fastening base is installed in the longitudinal direction, and a traveling body which is reciprocally movable in the longitudinal direction of the blade fastening base. A rotating grindstone that is mounted on top of it, attaches a base to the running body, and slidably attaches to the base, and grinds the blade fixed to the blade mounting base to the sliding body. Assembling via a sliding member, and providing a grinding amount setting device for setting the feeding amount of the rotary grindstone between the sliding member and the base,
It is a cutting edge superfinishing device equipped with a blade surface grinding mechanism in which a fluid pressure cylinder for pressing a sliding member toward a cutting tool is attached to the sliding body.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting edge super-finishing device capable of grinding the blade surface as well as the blade back will be described below with reference to the accompanying drawings. 4 is provided on one side of the bed 2 having at least the length of the blade 1 to be ground.
Is a tool holder for pressing and holding the tool holder 3 with the tool holder 3.
A traveling body 6 supported by rollers 5 at its four corners is mounted on upper portions of both sides of the bed 2, and a pulley 8 of a prime mover 7 attached to a lower portion of one side of the traveling body 6 and a shaft below the pulley 8 are mounted on the traveling body 6. A belt 10 is suspended between supported pulleys 9, and a chain wheel 11 fitted to the other end of the pulley 9 is tensioned by springs (not shown) at both longitudinal ends of the bed 2. By engaging the chain 12 held in the installed state,
The traveling body 6 is reciprocally movable. At the time of this meshing,
As shown in FIG. 1, by supporting the integral auxiliary sheave 13 on both sides close to the sheave 11 and engaging the same with the chain 12, vibration at the time of the engagement of the sheave 11 is prevented. There is.

In the traveling body 6, the bases 14 and 15 and the rotary grindstones 36 and 36 for the front and back of the blade are opposed to each other with respect to the blade 1 fixed to the blade mounting base 4. The blades 1 are attached separately with their phases shifted in the longitudinal direction so that they do not interfere with each other. In the present embodiment, since the blade 1 is pressed and fixed with the blade table 16 portion as the lower surface, in order to follow the inclined surface of the blade table 16, especially the lower base 15
Is pivotally supported in an inclined manner by a pair of support plates 17 arranged on both sides thereof, and a guide rod 19 projecting from a lower base 15 is inserted into the lower opening 18 of the one support plate 17. The other end of the guide rod 19 is engaged with the screw shaft 20,
The tilting state of the lower base 15 can be adjusted by screwing 0.

A prime mover 21 is arranged on one side of each of the pair of upper and lower bases 14 and 15, and a rotary shaft 2 supported between a pulley 22 of the prime mover 21 and a pair of bearings 23.
A belt 26 is suspended around a pulley 25 that is slidable in the axial direction with respect to the motor 4. In addition, guide plates 27 are installed at regular intervals in the substantially central portions of the bases 14 and 15, and sliding bodies 28 that are movable back and forth toward the cutting edge of the cutting tool 1 are provided between the guide plates 27. The sliding member 29 is engaged with the sliding guide 29 installed on the sliding member 28.
Is put up. In the illustrated example, an annular sliding member 30 formed by inserting and supporting the rotary shaft 24 is supported by a sliding guide 29 that employs a linear way, and this sliding member 3
A regulating plate 31 is installed at the rear part of 0. A bearing 33 for supporting the feed shaft 32 is installed on the other side of the pair of upper and lower bases 14 and 15, and the feed shaft 32 is attached to the slide body 2.
8 is screwed into an arm 34 protruding from one side. Further, the dial indicator 35 is attached to the sliding body 28, and the tip of the spindle is brought into contact with the regulating plate 31, so that the sliding amount of the sliding body 28, that is, the tip of the rotary shaft 24 is fitted. The amount of grinding of the blade 1 by the rotary grindstone 36 is set. In the present embodiment, the grinding amount setting device 37 manually rotates the handle 38 fitted to the base end of the feed shaft 32 and sets it based on the indication scale of the dial indicator 35. The mechanism for transmitting the drive from the prime mover to the feed shaft 32, while using the dial indicator 35 as an indicator with contacts, automatically stops the screwing of the feed shaft 32 when a preset grinding amount is reached. You can also The blade surface grinding mechanism and the blade back grinding mechanism thus configured are arranged so that the rotary grindstones 36, 36 face each other with respect to the blade 1.

A fluid pressure cylinder 39 is attached to the other end of the sliding body 28, and the tip of a rod 40 of the fluid pressure cylinder 39 is connected to the regulating plate 31. Further, the bases 14 and 15
A limit switch, which is a detection mechanism, or a detector 41 such as a photoelectric tube as shown in the drawing is attached to the traveling body 6 by receiving a signal from the detector 41 and rotating the prime mover 7 in the reverse direction. A reciprocating motion control mechanism for reversing the moving direction of the fluid pressure control device and a fluid pressure release control mechanism for releasing the fluid pressure of the fluid pressure cylinder 39 (both not shown) are provided. In the figure, 42 is
A cooling water gutter provided between the bed 2 and the blade fastening base 4 over the entire length of the range in which the rotary grindstone 36 moves. FIG. 6 shows the tool 1 after the rough grinding, in which the main blade surface is ground by an existing knife grinder for rough grinding, and the ground surface of the blade table 16 and the back surface of the blade is rough, and further,
A burr 43 is generated toward the back side of the blade. By superfinishing this rough ground surface, a blade with a smooth surface 44 as shown in FIG. 7 is obtained, and by performing a two-step grinding during superfinishing, a blade with a blade 45 as shown by the chain double-dashed line is obtained. Is obtained.

Next, the operation will be described. First, in the plywood or woodworking factory, the main blade surface of the cutting tool 1 is temporarily rough-ground by an existing rough-grinding knife grinder which is usually arranged at an adjacent position. To do. After that, the blade 1 having the main blade surface rough-ground is placed on the blade mounting base 4 with the blade table 16 portion as the lower surface, and is pressed and fixed by the blade presser 3. Next, in order to adjust the grinding angle of the blade surface 16 portion by the rotary grindstone 36 of the blade surface grinding mechanism, the lock nut is once loosened and the screw shaft 20 is rotated.
Screw appropriately to determine the inclination angle of the lower base 15,
Then loosen and fix the lock nut again. After the angle is determined, the traveling body 6 is moved by driving the prime mover 7 so that the rotary grindstone 36 reaches the surface of the blade 1. The traveling body 6 is a blade 1
When the fluid pressure cylinder 39 is operated, the fluid pressure is supplied from each port to extend the rod 40 so that the pressure in the rear cylinder chamber becomes higher than that in the front cylinder chamber, and the rod 40 is extended. Always push forward. At this time, at the same time, the prime mover 21 can be driven to apply a rotational force to the rotary grindstone 36 located at the backward limit.

Then, when the feed shaft 32 is screw-rotated, the slide body 28 is guided by the guide plate 27 and the slide member 30.
The sliding body 28 stops at that position when the rotary grindstone 36 comes into contact with the cutting edge surface of the cutting tool 1 together with the sliding member 3
Only 0 begins to retreat. That is, the rotary grindstone 36 is the blade 1
Since the feed shaft 32 is still screw-rotating even when it comes into contact with the blade edge surface of the sliding member 28, the sliding member 30 acts to move backward together with the sliding body 28. Since it is pressed forward, the rotary grindstone 36 comes into contact with the cutting edge surface and cannot move forward anymore, but is brought into a stopped state and only the sliding member 30 relatively moves backward. This amount of retreat is the amount of grinding of the blade 44 at the blade tip portion, and the screw rotation of the feed shaft 32 is stopped at the time when the dial indicator 35 indicates the initial scale or at the time set by presetting. When the grinding amount is set, that is, when the rotary grindstone 36 is kept in a rotating state until the sliding body 28 stops moving backward, it is constantly abutting on the cutting edge surface. In order to avoid it, it is desirable to drive the traveling body 6 at a low speed.

Next, with the rotary grindstone 36 being rotated,
When the prime mover 7 is driven to rotate the chain wheel 11, the chain wheel 1
1 is sandwiched by the auxiliary chain wheels 13 on both sides thereof, and the amount of suspension with respect to the chain 12 is increased, so slippage during transfer to the chain link is prevented, and the traveling body 6 moves forward smoothly. Become. When the traveling body 6 reaches one end of the blade 1 in the longitudinal direction during the forward movement and the detector 41 detects this,
The prime mover 7 is reversely driven through an appropriate timing device such as a timer, and the supply of fluid pressure to the rear chamber of the fluid pressure cylinder 39 is temporarily stopped until the backward movement of the traveling body 6 is started. The pressing force on the blade 1 is released with respect to 36. In this way, when the traveling body 6 is reciprocated a plurality of times so that the cutting edge portion of the cutting tool 1 does not burn, the cutting tool 1 is superfinished with a cutting blade 4 as shown in FIG.
4,45 can be obtained. Then, the reciprocating movement of the traveling body 6 can be stopped at any time within the range of the grinding amount set by the grinding amount setting device, when it is determined that the grinding is completed. Further, the detector 41 can be attached to, for example, a traveling body other than the bases 14 and 15 as long as it can detect that the traveling body 6 has reached one end in the longitudinal direction of the blade 1, and as a detection mechanism, It is changed as appropriate, such as using an encoder provided on the motor other than the container.

In the embodiment, the blade back grinding mechanism is added, and the apparatus capable of simultaneously grinding the blade front surface 16 portion and the blade back surface portion of the blade 1 has been described. However, in the apparatus of the present invention intended only for the blade surface grinding. The back grinding mechanism is omitted and only the front grinding mechanism is provided.

[0013]

As described above, according to the present invention, the grinding amount is set,
Until the set grinding amount is ground, the rotary whetstone is urged by the fluid pressure against the cutting edge surface to reciprocate any number of times, so even if the cutting tool is finely deformed or uneven in the longitudinal direction, Even if it has, the blade can be uniformly attached within the range of the grinding amount once set.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a cutting edge superfinishing apparatus according to the present invention.

FIG. 2 is a view taken along the line AA of FIG.

FIG. 3 is a view taken along the line BB of FIG.

FIG. 4 is a view taken along the line CC of FIG.

5 is a view taken along the line DD of FIG.

FIG. 6 is an enlarged view of a cutting edge before superfinishing.

FIG. 7 is an enlarged view of a cutting edge after superfinishing.

[Explanation of symbols]

1 ... cutlery, 2 ... bed, 4 ... cutlery stand,
6 ... Running body, 14, 15 ... Base, 28 ... Sliding body, 30 ... Sliding member, 36 ... Rotating grindstone, 37 ...
..Grinding amount setting device, 39 ... Fluid pressure cylinder, 4
4,45 ... with blade.

Claims (1)

[Claims] 1. A laterally long bed having a tool holder mounted in the longitudinal direction, and a traveling body which is reciprocally movable in the longitudinal direction of the tool holder, mounted on the bed, and travels there. The base is attached to the body, the sliding body is slidably attached to the base, and the rotary grindstone for grinding the blade fixed to the blade mounting base through the sliding member is attached to the sliding body. With
A blade table provided with a grinding amount setting device for setting the feeding amount of the rotary grindstone between the sliding member and the base, and further equipped with a fluid pressure cylinder for pressing the sliding member toward the tool on the sliding body. Cutting edge super finishing device equipped with a grinding mechanism.