JPH0659606B2 - Cutting edge super finishing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for superfinishing a blade edge of a blade that has been subjected to rough polishing when grinding various long blades such as veneer lace and veneer slicer.

"Prior art" Conventionally, the super finishing of the cutting edge was done by hand grinding with a flat grindstone, but in recent years, the elastic force of the spring was used to press the grindstone against the cutting edge surface, and the mechanical means Attempts have been made to finish it.

“Problems to be Solved by the Invention” By using mechanical means, both the time required for superfinishing and the superfinishing accuracy can be significantly improved as compared with manual work that requires intuition.

However, in the device using the elastic force of the spring, the pressing force received by the rotating grindstone due to the elastic force of the spring varies, and as a result, the rotating grindstone is constantly vibrated, and 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. The rotating grindstone is pressed against the cutting edge to reciprocate in the longitudinal direction of the cutting tool, but when the rotating grinding wheel reaches the longitudinal end of the cutting tool and is reversely driven there, the rotating grinding wheel remains pressed against the cutting edge. If there is, that part is excessively ground and causes so-called blade dripping, and if the rotary grindstone passes through the longitudinal edge of the blade and is then driven in reverse, the rotary grindstone jumps out to the side opposite the blade surface, The rotary grindstone and the edge of the blade collide when returning to the blade.

"Means for Solving Problems" The present invention is a blade edge super-finishing device that stabilizes the pressing force against the blade edge of a rotary grindstone and solves a problem at the time of reverse driving, in which a blade mounting table is installed in the longitudinal direction. A horizontally long bed, a traveling body mounted on the bed so as to be reciprocally movable in the longitudinal direction of the blade mounting table, a base attached to the traveling body, and the blade to the base. And a sliding body that is slidably mounted in a direction orthogonal to the longitudinal direction of the sliding body, and is attached to the sliding body through a sliding member so as to be slidable in the same direction as the sliding direction of the sliding body. A grinding amount preset means composed of a rotary grindstone, a moving mechanism for moving and operating the sliding body in a sliding direction thereof, and a fluid cylinder for urging the sliding member toward the blade with respect to the sliding body; Detects when the rotating grindstone reaches the long edge of the blade A detection mechanism, a reciprocating motion control mechanism that causes the traveling body to travel in the reverse direction based on a detection signal of the detection mechanism, and a movement of the fluid cylinder of the fluid cylinder until the traveling body restarts traveling in the reverse direction based on the detection mechanism. The gist of the present invention is to have a fluid pressure control mechanism for temporarily releasing the fluid pressure.

Incidentally, here, when the traveling body restarts traveling in the opposite direction, when the rotating grindstone deviates from the longitudinal edge of the blade, the traveling body starts traveling in the opposite direction, and the rotating grindstone re-enters the longitudinal edge of the blade. Means when is reached.

"Embodiment" Hereinafter, an embodiment in which a blade back grinding mechanism is added to a device according to the present invention in addition to a blade surface grinding mechanism will be described with reference to the accompanying drawings.

On a side of the bed 2 having at least the length of the blade 1 to be ground, a mounting table 4 for pressing and holding the blade 1 with a blade holder 3 is installed.

On the upper portions of both sides of the bed 2, a traveling body 6 supported by rollers 5 at four corners is mounted, 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. A belt 10 is wound around a supported pulley 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. The traveling body 6 is reciprocally movable by engaging with the chain 12 held in the state.

At this time of engagement, as shown in FIG. 4, a pair of auxiliary sheaves 13 are supported on both sides close to the sheave 11, and are engaged with the chain 12, so that when the sheave 11 is engaged and rotated. Vibration is prevented.

In the traveling body 6, even if the bases 14 and 15 make the rotary grindstones 36 and 36 of the blade surface grinding mechanism and the blade back grinding mechanism, which will be described later, face each other with respect to the blade 1 on the mounting table 4. In order not to interfere with each other, the blades are attached separately from each other with their phases shifted in the longitudinal direction. In this embodiment, since the blade 1 is pressed and fixed with the blade table 16 portion as the lower surface, the lower base 15 is paired with a pair of supports arranged on both sides thereof so as to follow the inclined surface of the blade table 16. It is pivotally supported in an inclined manner by the plate 17, and also into the lower opening 18 of the one support plate 17,
A guide rod 19 protruding from the lower base 15 is inserted, the other end of the guide rod 19 is engaged with a screw shaft 20, and the tilted state of the lower base 15 is adjusted by screwing the screw shaft 20. There is.

A prime mover 21 is installed on one side of each of the pair of upper and lower bases 14 and 15, and a pulley 22 of the prime mover 21 and
A belt 26 is wound around a pulley 25 that is axially slidable with respect to a rotary shaft 24 supported between a pair of bearings 23.

In addition, guide plates 27 are installed in the central portions of the bases 14 and 15 at regular intervals, and a sliding member 28 that is movable back and forth toward the cutting edge of the cutting tool 1 is engaged between the guide plates 27. Further, a sliding member 30 is mounted on a sliding guide 29 installed on the sliding body 28. 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 employing a linear way, and a regulating plate 31 is installed at the rear portion of the sliding member 30. .

A bearing 33 for supporting the feed shaft 32 is provided on the other side of the pair of upper and lower bases 14 and 15, and the feed shaft 32 is screwed into an arm 34 protruding from one side of the sliding body 28. ing. Further, a fluid cylinder 39 is attached to the other end of the sliding body 28, and the tip of the rod 40 is attached to the regulating plate 3.
1, the dial indicator 35 is attached to the sliding body 28, and the tip of the spindle is attached to the regulating plate 3.
1, the feed amount of the sliding body 28, that is, the grinding amount of the blade 1 by the rotary grindstone 36 fitted to the tip of the rotary shaft 24 is preset.

Incidentally, the grinding amount presetting means 37 composed of the feed shaft 32, which is a moving mechanism for moving the sliding body in the sliding direction, and the fluid cylinder 39 is provided at the base end of the feed shaft 32 in this embodiment. The fitted handle 38 is manually rotated and preset based on the instruction scale of the dial indicator 35. For example, the drive from the prime mover is transmitted to the feed shaft 32, while the dial indicator 35 is an indicator with a contact. For example, when the preset grinding amount is reached, it is possible to use a mechanism that automatically stops the screwing of the feed shaft 32 or rely on a primitive visual measurement such as a judgment based on the protruding length of the rod 40.

Further, a limit switch as a detection mechanism for detecting that the rotary grindstone 36 has reached the longitudinal edge of the blade 1 or a detector 41 such as a photoelectric tube as shown in the drawing is attached to both ends of the traveling body 6. And a reciprocating motion control mechanism that reverses the moving direction of the moving body 6 by receiving the signal from the detector 41 and reverses the moving direction of the traveling body 6, and the moving direction of the traveling body 6 similarly receiving the signal from the detector 41. And a fluid pressure control mechanism (neither is shown) that temporarily releases the fluid pressure of the fluid cylinder 39 until.

In addition, reference numeral 42 in the drawing denotes a cooling water gutter provided between the bed 2 and the mounting table 4 over the entire moving distance of the rotary grindstone 36. FIG. 6 shows the tool 1 after 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 are rough, and A burr 43 is generated toward the. By superfinishing this rough grinding surface, a blade with a smooth surface 44 as shown in FIG. 7 can be obtained. Also, if a two-step grinding is applied during superfinishing, the blade shown by the chain double-dashed line can be obtained. App.45 is obtained.

Next, the operation will be described. First, in the plywood or woodworking factory, the main blade surface of the blade 1 is once rough-ground by an existing rough-grinding knife grinder that is usually arranged at an adjacent position. After that, the blade 1 having the main blade surface rough-ground is placed on the mounting table 4 with the blade table 16 being the lower surface, and is pressed and held by the blade presser 3.

Next, in order to adjust the grinding angle of the lower rotary grindstone 36 to the blade surface 16 portion, the lock nut is loosened once and the screw shaft 20 is appropriately screwed to determine the inclination angle of the lower base 15, and then again. Loosen and fix the lock nut.

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. Running body 6
When the tool reaches the surface of the blade 1, the fluid cylinder 39 is operated,
Fluid is supplied from each port so that the pressure in the rear cylinder chamber becomes higher than that in the front cylinder chamber.
Is extended and the regulation plate 31 is always pressed 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.

Next, when the feed shaft 32 is screw-rotated, the sliding body 28 is advanced along with the sliding member 30 while being guided by the guide plate 27, and the rotary grindstone 36 comes into contact with the tip surface of the cutting tool 1 and then the sliding body 28. Only the sliding member 30 starts to retreat in the state in which is stopped at the present position.

That is, even if the rotary grindstone 36 comes into contact with the cutting edge surface of the tool 1, if the feed shaft 32 is still screw-rotating, the sliding member 3
At 0, the action of retreating together with the sliding body 28 works, but since it is pressed forward by the rod 40 of the fluid cylinder 39, the rotary grindstone 36 remains relatively stationary while being in contact with the cutting edge surface. Therefore, only the sliding member 30 is retracted.

This amount of retreat becomes the amount of grinding of the blade tip 44 of the blade tip portion, and when the dial indicator 35 indicates the initial scale or when the preset set value is reached, the feed shaft 3
Stop the screwing rotation of 2.

In this way, when the grinding amount is preset in this way, that is, when the rotary grindstone 36 is kept in the rotating state until the sliding body 28 stops backward, it is constantly abutting on the cutting edge surface, It is desirable to drive the traveling body 6 at a low speed in order to avoid contact.

Next, in the state where the rotary grindstone 36 is rotated, when the prime mover 7 is driven to rotate the chain wheel 11, the chain wheel 11 is sandwiched by the auxiliary chain wheels 13 on both sides of the chain wheel 11, and the winding amount with respect to the chain 12 is increased. Therefore, slippage at the time of transferring to the chain link is prevented, and the traveling body 6 smoothly moves forward.

When the traveling body 6 reaches the edge of the blade 1 in the longitudinal direction during forward movement and the detector 41 detects this, the prime mover 7 is driven in reverse through an appropriate time limit device such as a timer, and the fluid cylinder 39 The supply of the fluid to the rear chamber is temporarily stopped until the backward movement of the traveling body 6 is started, and the pressing force of the rotary grindstone 36 against the blade 1 is released during this period.

When the traveling body 6 overruns from the longitudinal edge of the blade 1, the resupply of the fluid pressure is delayed until the traveling body 6 returns to one end of the blade 1 in the longitudinal direction.

In this way, when the traveling body 6 is reciprocated a plurality of times so that the blade edge portion of the blade 1 does not burn, the blade 1 is superfinished with blades 44, 45 as shown in FIG. Can be obtained.

The reciprocating movement of the traveling body 6 can be stopped at any time within the range of the grinding amount preset by the grinding amount presetting means, when it is determined that the grinding is completed.

In this embodiment, the rotary grindstones 36, 36 contact the front and back surfaces of the blade 1 in order to simultaneously grind the blade surface 16 portion and the blade back portion of the blade 1. It is also possible to omit the rotary grindstone 36 for grinding the back of the blade or add a grindstone for rough grinding so as to be exclusively used for grinding the blade table 16. Further, in the embodiment, the bases 14 and 15 are arranged separately on the upper and lower parts of the tool so that the front and side surfaces of the rotary grindstones 36 and 36 are brought into contact with the front and back of the blade, respectively. The bases 14 and 15 may be arranged on the same side with respect to the front surface of the blade as long as the back side faces are in contact with each other.

Further, the detector 41 can be attached to other than the traveling body as long as it can detect that the rotary grindstone 36 has reached the longitudinal edge of the blade 1, and the detection mechanism can be an encoder attached to the motor in addition to the detector. It can be changed as needed.

“Effect” As described above, according to the present invention, the grinding amount is preset, and while the grinding amount is preset, the rotating grindstone is urged to the cutting edge surface by the fluid pressure, and the rotating grindstone is When reaching the longitudinal edge, this is detected, when the rotary grindstone is driven in reverse, the fluid pressure to the cutting edge surface of the rotary grindstone is temporarily released, and the main grind of the rotary grindstone is repeated any number of times, so that the profile grinding is performed. Even if the blade is long and has minute deformations and irregularities in the longitudinal direction, the blade can be evenly attached from the abutting surface of the rotary grindstone by the preset grinding amount, It is possible to eliminate the so-called edge drooping, which is an excessive grinding of the edge portion in the direction, and to avoid the collision between the edge portion in the longitudinal direction of the blade edge and the rotary grindstone, and prevent damage to both.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG.
FIG. 3 is a view taken along the line AA of FIG. 3, FIG. 3 is a view taken along the line BB of FIG. 1, FIG. 4 is a view taken along the line CC of FIG. 1, and FIG. 6 is an enlarged view of the cutting edge before superfinishing, and FIG. 7 is an enlarged view of the cutting edge after superfinishing. 1 ... Blade, 2 ... Bed, 4 ... Mounting table, 6 ... Traveling body, 14, 15 ... Base, 28 ... Sliding body, 30 ... Sliding member, 36 ... Rotating grindstone, 37 ... Grinding amount presetting means, 39 ... fluid cylinders, 44, 45 ... with blade.

Claims (1)

[Claims] 1. A horizontally long bed in which a tool rest is installed in a longitudinal direction, a traveling body mounted on the bed so as to be capable of reciprocating along the longitudinal direction of the tool rest, and the traveling body. The attached base, the sliding body mounted on the base so as to be slidable in the direction orthogonal to the longitudinal direction of the cutting tool, and the sliding body sliding on the sliding body via a sliding member. A rotary grindstone for blade grinding, which is slidably mounted in the same direction as the moving direction, a moving mechanism for moving and operating the sliding body in the sliding direction, and the sliding member attached to the blade side with respect to the sliding body. A grinding amount presetting means composed of an urging fluid cylinder, a detection mechanism for detecting that the rotary grindstone has reached the longitudinal edge of the blade, and a traveling body to reversely travel based on a detection signal of the detection mechanism. Based on the reciprocating motion control mechanism and the detection mechanism, the traveling body is in the opposite direction. Cutting edge super-finishing device comprising a fluid pressure control mechanism that temporarily releases the fluid pressure of the fluid cylinder until the traveling to the next is restarted.