JPH06320404A - Grinding liquid supply mechanism in drill grinding apparatus - Google Patents

Abstract

PURPOSE:To surely supply a grinding liquid to the tip of a drill in a simple constitution and to reduce the quantity of used grinding liquid. CONSTITUTION:A casing member 32 includes a cover plate unit 36 disposed corresponding to the extent where a part of a grinding wheel 18 soaked in a grinding oil 34 reaches the tip 16 of a drill 12 with the rotation of the grinding wheel 18. The cover plate unit 36 includes a pair of side plates 38, 38 disposed close to both side parts of the grinding wheel 18, and a curved plate 40 integrally connected to the end parts of the side plates 38, 38, wherein a slit clearance 42 for atomizing and supplying a grinding oil 34 adhering to the grinding wheel 18 toward the tip 16 of the drill 12 is formed between the upper end side of the curved plate 40 and the peripheral surface 20 of the grinding wheel 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding liquid supply mechanism in a drill grinding device for supplying a grinding liquid to the drill when grinding the cutting edge of the drill such as a three-sided cone or a four-sided cone.

[0002]

2. Description of the Related Art For example, various drills such as a three-sided cone and a four-sided cone are used as a tool for punching a wooden board, a synthetic resin board, or the like. In this type of drill, when the blade edge is worn or the like, the machining accuracy is reduced, and therefore, the blade edge is ground by a drill grinding device as necessary.

Usually, this drill grinding device is constructed so as to grind the cutting edge of the drill on the peripheral surface of a rotating disk-shaped grindstone, and wet grinding is carried out in order to prevent burning of the cutting edge of the drill. Is being done.

[0004]

By the way, in the above-described wet grinding, a grinding liquid supply mechanism is generally provided for supplying a grinding liquid to a contact portion between a cutting edge of a drill and a disk-shaped grindstone. A grinding fluid delivery nozzle that constitutes a fluid supply mechanism is arranged toward the contact portion, and is configured to deliver the grinding fluid from the nozzle via an actuator. Therefore, it has been pointed out that a dedicated actuator is required for the grinding fluid supply mechanism, the structure is complicated, and a large amount of grinding fluid is used.

The present invention is intended to solve this type of problem, and enables the grinding fluid to be reliably supplied to the cutting edge of the drill with a simple structure, and the amount of the grinding fluid used can be made effective. An object of the present invention is to provide a grinding fluid supply mechanism in a drill grinding device that can be reduced.

[0006]

In order to achieve the above object, the present invention provides a grinding fluid for a drill in a drill grinding apparatus for grinding a cutting edge of a drill on a peripheral surface of a rotating disk-shaped grindstone. A grinding liquid supply mechanism for supplying the grinding liquid supply mechanism, wherein the grinding liquid supply mechanism includes a casing member that stores the grinding liquid so as to immerse a part of the disk-shaped grindstone in the grinding liquid, and the casing member is With a cover plate body that is disposed correspondingly until the part of the disc-shaped grindstone that has been immersed in the grinding liquid with the rotation of the disc-shaped grindstone reaches the cutting edge of the drill, The cover plate body forms a slit-like gap with the peripheral surface of the disc-shaped grindstone in order to supply the grinding fluid adhering to the disc-shaped grindstone in the form of mist toward the blade edge of the drill. It is characterized by

Further, the casing member is provided with a grinding fluid collecting means provided on the side opposite to the cover plate body, and the grinding fluid collecting means collects the atomized grinding fluid supplied to the cutting edge of the drill. It is preferable to have a tubular body for leading out into the grinding fluid stored in the casing member.

[0008]

In the grinding liquid supply mechanism in the above-described drill grinding apparatus according to the present invention, a part of the disk-shaped grindstone is immersed in the grinding liquid stored in the casing member, and the disk-shaped grindstone is rotated. Then, the portion of the disk-shaped grindstone dipped in the grinding fluid moves toward the tip of the drill. At that time, the portion of the disk-shaped grindstone that had been immersed in the grinding liquid passed through the slit-shaped gap formed between the cover plate provided on the casing member and the peripheral surface of the disk-shaped grindstone. The grinding fluid is atomized and supplied toward the cutting edge of the drill. Therefore, the grinding fluid can be reliably supplied to the cutting edge of the drill, and the amount of the grinding fluid used can be reduced all at once.

Moreover, since the grinding fluid is supplied as the disk-shaped grindstone rotates, a dedicated actuator is not required. Furthermore, since the atomized grinding fluid after use is recovered through the tubular body that constitutes the grinding fluid recovery means, it is possible to use the grinding fluid efficiently.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grinding fluid supply mechanism in a drill grinding apparatus according to the present invention will be described below with reference to the accompanying drawings.

1 and 2, reference numeral 10
Shows a drill grinding apparatus incorporating a grinding liquid supply mechanism according to the present embodiment. This drill grinding device 10 has a drill 12
And a support rod 14 to which the support rod 14 is fixed, the support rod 14 is inserted, the tip edge of the drill 12 is held, and the twist angle of the cutting edge 16 of the drill 12 is set to the peripheral surface 20 of the disk-shaped diamond grindstone 18. The clearance angle of the adjustable holder 22 and the clearance angle of the cutting edge 16 of the drill 12 held by the holder 22 is adjustable with respect to the peripheral surface 20 of the grindstone 18, and the holder 22 is attached to the shaft of the grindstone 18. A movable table 24 that can move forward and backward in the direction (direction of arrow A), and a grinding fluid supply mechanism 25 according to the present embodiment for supplying grinding oil (grinding fluid) described below to the drill 12.

As shown in FIG. 2, a rotary drive source 28 is fixed on a base 26 which constitutes the drill grinding apparatus 10,
Rotating shafts 30 and 30a extend from both sides of the rotary drive source 28. The grindstone 18 is rotatably attached to the rotary shaft 30, and the grindstone 18 is surrounded by a casing member 32 that constitutes the grinding fluid supply mechanism 25 according to the present embodiment.

As shown in FIG. 3, at the bottom of the casing member 32, a part of the grindstone 18 is dipped and the grinding oil 34 is stored therein.
The grindstone 18 immersed in the grinding oil 34 with the rotation of the
Has a cover plate body 36 correspondingly arranged until the cutting edge 16 of the drill 12.

The cover plate body 36 includes a pair of side plates 38, 38 arranged in proximity to both side portions of the grindstone 18, and a curved plate 40 integrally connected to the end portions of the side plates 38, 38. (See FIG. 1). The curved plate 40 has an upper end curved corresponding to the peripheral surface 20 of the grindstone 18, and the grinding oil 34 attached to the grindstone 18 is provided between the upper end side and the peripheral surface 20 of the grindstone 18. A slit-shaped gap 42 is formed for supplying mist to the cutting edge 16 of the drill 12.

As shown in FIG. 3, the casing member 32 is provided with a grinding fluid recovery means 44 on the side opposite to the cover plate 36. The grinding fluid collecting means 44 has a hose (tubular body) 45 that collects the atomized grinding oil 34 supplied to the cutting edge 16 of the drill 12 and draws it out into the grinding oil 34 stored in the casing member 32. . One end of the hose 45 is fixed to the upper side of the casing member 32, and the other end of the hose 45 is connected to the casing member 32.
Is arranged at the lower end side of the above and above the oil surface of the grinding oil 34. A guide plate 46 is provided on one end side of the hose 45 as needed so as to reliably collect the atomized grinding oil 34 in the casing member 32 on one end of the hose 45.

The movable table 24 is provided with a pair of rods 48, 48 which are arranged on a fixed member 47 so as to be movable back and forth via linear bearings (not shown). The rods 48, 48 have an arc-shaped plate 50. It is fixed integrally. This arc-shaped plate 50
A scale portion 52 for adjusting the clearance angle of the cutting edge 16 of the drill 12 with respect to the peripheral surface 20 of the grindstone 18 is provided on the peripheral surface of the. An arcuate groove 54 is formed in the arcuate plate 50, and a mounting member 56 is arranged so as to be fixed at a predetermined angular position via the arcuate groove 54.

A through hole 58 is formed in the mounting member 56 in the vertical direction.
Is formed, and the scale member 60 is attached to the side portion of the mounting member 56 in a positionally adjustable manner. A stopper member 62 is swingably mounted on the scale member 60. The holder 22 is inserted into the through hole 58 of the mounting member 56.
Is inserted.

As shown in FIGS. 4 and 5, the holder 22
Has an outer cylindrical body 64 and an inner cylindrical body 66. A pair of protrusions 68 parallel to each other at the tip of the outer cylindrical body 64,
70 is formed, and the swing arms 76 and 78 are mounted on the protruding portions 68 and 70 in a state of being pressed in the directions approaching each other via the springs 72 and 74. When the drill 12 is inserted, the rocking arms 76 and 78 rotate the drill 12 in the twisting direction when the drill 12 is inserted, and hold the tip edge of the drill 12 around the whetstone 18. A pair of rollers 80, 82 for positioning with respect to the surface 20 are provided so as to be slidably contactable with each other. These rollers 80 and 82 are
Normally, they are in sliding contact with each other through the elastic force of the springs 72 and 74 when no external force is applied. A scale member 84, which can adjust the twist angle of the drill 12 with respect to the peripheral surface 20 of the grindstone 18, is fixed to the rear end portion of the outer cylindrical body 64 via a set screw or the like.

The inner cylinder 66 is constructed so that it can be inserted into the outer cylinder 64, and a guide cylinder 92 is replaceably fixed to the end of the inner cylinder 66. This guide cylinder 92
A plate-like projection 94 is provided at the tip end of the plate-shaped projection 94, which is press-fitted between the rollers 80 and 82 of the outer cylindrical body 64 and separates the rollers 80 and 82 by a distance in which the drill 12 can be inserted. A hole 96 corresponding to the diameter of the drill 12 is formed at the tip of the guide cylinder 92. The inner cylinder 66 and the outer cylinder 64
And are held together by a ball plunger or the like (not shown).

The support rod 14 can be inserted into the inner cylinder 66, and has a hole 98 and a slot 10 at its tip.
0s are formed in communication with each other. This support rod 14
A screw (not shown) is screwed in with the slit 100 interposed therebetween, and the hole 98 is expanded / contracted by this screw. The drill 12 is attached to and detached from the hole 98 via the holder 104. The drill 12 may be directly fixed to the support rod 14 without using the holder 104.

On the rear end side of the support rod 14, the drill 12
The reference mark 106 for adjusting the mounting angle of the
Two bearings are provided at intervals of 80 °, and a bearing 108 is mounted near the reference mark 106.

As shown in FIG. 2, a grindstone 18a is attached to a rotary shaft 30a of the rotary drive source 28.
Is surrounded by the casing member 32a. A movable table 24a is arranged above the casing member 32a so as to be movable back and forth in the arrow A direction. The casing member 32a and the moving base 24a are configured in the same manner as the casing member 32 and the moving base 24 described above, and the same constituent elements are denoted by the same reference numerals and the detailed description thereof is omitted. To do.

Next, the grinding fluid supply mechanism 25 according to the present embodiment.
Will be described in connection with the drill grinding apparatus 10 incorporating the same.

The drill 12 is inserted into the hole 98 of the support rod 14 integrally with the holder 104, and the twisted position of the drill 12 is adjusted via the reference mark 106. Specifically, the rear end position of the groove of the drill 12 is set to the reference mark 106.
The drill 12 is fixed to the support rod 14 by tightening screws (not shown).

Then, the position of the scale member 60, that is, the height position of the stopper member 62 is adjusted according to the length of the drill 12 and the like through the scales engraved on the scale member 60. Then, the stopper member 62 is
After being inverted from the position shown in FIG. 1, the inner cylinder 66 is taken out from the mounting member 56, and the guide cylinder 92 fixed to the end of the inner cylinder 66 is replaced corresponding to the drill 12. . When the inner cylinder body 66 is inserted again into the outer cylinder body 64 mounted on the mounting member 56, the plate-like projection 94 of the guide cylinder body 92 is press-fitted between the rollers 80 and 82, so that the rollers 80 and 82. The gaps are separated by a distance that allows the ridge portion of the drill 12 to be smoothly inserted.

Further, the scale member 84 fixed to the outer cylinder 64 is adjusted in accordance with the twisting angle of the drill 12 on the pulling side, so that the rollers 80, 82 mounted on the outer cylinder 64 are adjusted. The angular position of is the peripheral surface 20 of the grindstone 18.
Is adjusted according to. Further, the attachment member 56 is swung along the arcuate groove 54 of the arcuate plate 50 corresponding to the clearance angle of the drill 12, and is positioned at a predetermined angular position via the scale portion 52. On the other hand, on the grindstone 18a side, the scale member 84 corresponding to the twist angle on the flat blade side of the drill 12
a is adjusted.

Then, the support rod 14 is inserted into the inner cylinder 66. At this time, when the support rod 14 is inserted so that the reference mark 106 on one side of the support rod 14 and 0 ° of the scale member 84 are on a straight line, the drill 12
The ridge line of the drill slides on the rollers 80 and 82, and the drill 12 moves in the axial direction while rotating along the twisting direction of the drill 12 (see FIG. 5). The bearing 108 provided on the support rod 14 comes into contact with the stopper member 62, whereby one of the hair pulling sides of the drill 12 is positioned with respect to the peripheral surface 20 of the grindstone 18. When the support rod 14 is inserted, an operator grips the bearing 108 so that the drill 12 and the support rod 14 themselves can be reliably rotated.

When the grindstone 18 pivotally attached to the rotary shaft 30 is rotated under the action of the rotary drive source 28, the grinding oil 34 soaking a part of the grindstone 18 adheres to the grindstone 18. Transferred upwards. Here, a slit-shaped gap 42 is formed between the upper end side of the curved plate 40 constituting the cover plate body 36 and the peripheral surface 20 of the grindstone 18, and the grindstone 1
The grinding oil 34 attached to the
It is atomized by passing 2. Since the atomized grinding oil 34 is supplied toward the cutting edge 16 of the drill 12, it is possible to prevent the burning of the cutting edge 16 of the drill 12.

The atomized grinding oil 34 supplied to the cutting edge 16 of the drill 12 is guided by the hose under the guiding action of the guide plate 46 which constitutes the grinding fluid recovery means 44, as shown by the two-dot chain line arrow in FIG. It is introduced into one end of the hose 45 and is cooled by passing through the hose 45 to be in a liquid state and returned from the other end into the grinding oil 34 in the casing member 32. Since the grindstone 18 is rotating in the direction of the arrow in the casing member 32, the other end side of the hose 45 is in a negative pressure state, and the grinding liquid in the hose 45 enters the casing member 32 from the other end side. It will be forced back.

In this state, when the operator reciprocates the movable table 24 in the direction of the arrow A by a predetermined distance under the guiding action of the rod 48, one hair pulling side of the drill 12 is ground over a predetermined width.

After the grinding of the one hair pulling side is completed, the support rod 14 is taken out from the inner cylindrical body 66, and the other reference mark 106 of the support rod 14 and 0 ° of the scale member 84 are aligned on a straight line. The support rod 14 is inserted into the inner cylindrical body 66 as described above. For this reason, the drill 12 fixed to the support rod 14 has the rollers 80, 8
While moving in contact with 2 while rotating, it moves to the grindstone 18 side, and the other hair pulling side of this drill 12 is positioned with respect to the peripheral surface 20 of the grindstone 18.

Then, in the state where the grindstone 18 is rotated via the rotary drive source 28 as described above, the movable table 24 is moved to the arrow A direction.
By moving back and forth in the direction, the other hair pulling side of the drill 12 is ground.

Drill 1 for which grinding on both hair pulling sides has been completed
2 is moved together with the support rod 14 from the movable table 24 to the movable table 24a, and another oyster blade of the drill 12 and both sides of the center are similarly ground on the movable table 24a side.

In this case, in this embodiment, the grinding oil 34 soaking a part of the grindstone 18 causes the slit-shaped gap between the cover plate 36 and the peripheral surface 20 of the grindstone 18 as the grindstone 18 rotates. After being atomized by passing through 42, it is supplied to the cutting edge 16 of the drill 12. Therefore, the drill 12
It is possible to reliably supply the grinding oil 34 to the blade edge 16 of each of the
The effect that the amount of the grinding oil 34 used is reduced at a stroke compared to the case where the oil is directly supplied.

Further, since the atomized grinding oil 34 supplied to the cutting edge 16 is effectively recovered via the hose 45, it is surely returned to the grinding oil 34 stored in the casing member 32. The grinding oil 34 can be effectively utilized. Moreover, the grinding oil 34 is rotated by the rotation of the grindstone 18 rotating under the action of the single rotary drive source 28.
Since it is supplied to the second cutting edge 16, a dedicated actuator is not required. As a result, there is an advantage that the entire structure of the grinding fluid supply mechanism 25 is downsized and simplified.

[0036]

According to the grinding liquid supply mechanism in the drill grinding apparatus of the present invention, the following effects can be obtained.

The portion of the disk-shaped grindstone that has been immersed in the grinding fluid as it rotates rotates into a slit-shaped gap formed between the cover plate provided on the casing member and the peripheral surface of the disk-shaped grindstone. By passing, the grinding fluid is atomized and supplied toward the tip of the drill. Therefore, the grinding fluid can be reliably supplied to the cutting edge of the drill, and the amount of the grinding fluid used can be reduced all at once. Furthermore, since the atomized grinding fluid after use is recovered through the tubular body that constitutes the grinding fluid recovery means, it is possible to use the grinding fluid efficiently. Moreover, since the grinding fluid is supplied with the rotation of the disk-shaped grindstone, a dedicated actuator is not required, and the structure of the entire grinding fluid supply mechanism can be easily simplified and downsized.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a drill grinding apparatus incorporating a grinding liquid supply mechanism according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the drill grinding device.

FIG. 3 is a vertical cross-sectional explanatory view of the grinding fluid supply mechanism.

FIG. 4 is an exploded perspective view of a support rod and a holder that constitute the drill grinding device.

FIG. 5 is a vertical cross-sectional explanatory view of the support rod and the holder.

[Explanation of symbols]

 10 ... Drill grinding device 12 ... Drill 14 ... Support rod 16 ... Blade edge 18, 18a ... Grinding stone 20, 20a ... Circular surface 22, 22a ... Holder 25 ... Grinding liquid supply mechanism 28 ... Rotation drive source 32, 32a ... Casing member 34 ... Grinding oil 36 ... Cover plate 38 ... Side plate 40 ... Curved plate 42 ... Slit-like gap 44 ... Grinding liquid collecting means 45 ... Hose 56, 56a ... Mounting member 64, 64a ... Outer cylinder 66, 66a ... Inner cylinder

Claims (2)

[Claims] 1. A grinding liquid supply mechanism for supplying a grinding liquid to the drill in a drill grinding device for grinding a cutting edge of a drill on a peripheral surface of a rotating disk-shaped grindstone, said grinding liquid supply The mechanism includes a casing member that stores the grinding liquid so as to immerse a part of the disc-shaped grinding stone in the grinding liquid, and the casing member is immersed in the grinding liquid as the disc-shaped grinding stone rotates. While having a cover plate body corresponding to the portion of the disk-shaped grindstone until reaching the cutting edge of the drill, the cover plate body, the grinding liquid that adheres to the disk-shaped grindstone A grinding fluid supply mechanism in a drill grinding apparatus, characterized in that a slit-shaped gap is formed between the disk-shaped grindstone and a peripheral surface of the disk-shaped grindstone in order to supply the drill to the cutting edge in a mist state. 2. The grinding fluid supply mechanism according to claim 1,
The casing member includes a grinding fluid recovery unit provided on the side opposite to the cover plate body, and the grinding fluid recovery unit collects the atomized grinding fluid supplied to the cutting edge of the drill and stores it in the casing member. Grinding fluid supply mechanism in a drill grinding apparatus, characterized in that it has a tubular body for leading out into the grinding fluid.