JP2559330B2 - Tool feeding device for tool grinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool feeding device used for a tool grinder for grinding various cutting tools such as a side milling cutter, a flat milling cutter, and an end mill.

[0002]

2. Description of the Related Art Conventionally, in this type of tool grinder,
The cutting tool is supported by both centers through a mandrel, the cutting edge of the cutting tool is applied to the blade receiver, and the cutting edge is ground with a grindstone using this as a guide. When grinding a cutting tool having a straight cutting edge such as a side milling cutter or a reamer, the blade receiver is fixed to the table side of the grinder, and the rake face of the linear blade is placed on the blade receiver and ground. When grinding a cutting tool with a twisting blade such as a flat milling cutter or an end mill, attach the blade receiver to the grindstone head side near the grindstone surface, and bring the cutting tool into contact with the rake face of the twisting blade. Feed and grind while rotating along the lead.

[0003]

However, in the above-mentioned conventional tool grinder, a blade receiver is used, and the blade is rotated in the direction toward the blade tip in order to grind the blade tip against the rake face of the cutting tool. Then, there is a problem that the grinding resistance causes the cutting edge to rise from the cutting edge and damage the cutting edge. Further, in a cutting tool having a twisted blade, there is a problem that unevenness in feeding or lifting of the cutting edge occurs because the tool is fed while grinding while rotating the tool along the helix angle.

Further, in the grinding of such a tool, there is a problem that a new tool cannot be manufactured even if re-grinding is possible.

The present invention solves the above-mentioned problems of the prior art, and sends a cutting tool while guiding it along the angle of the cutting edge without using a blade receiver to ensure grinding of a cutting edge by a grinding machine. It is an object of the present invention to provide a tool feed device for a tool grinder that can be used for not only re-grinding of a cutting tool but also new production.

[0006]

In order to achieve the above-mentioned object, the present invention has a box-shaped body, and a spindle portion arranged on both side surfaces of the body so as to be axially movable via bearings. , A chuck that is attached to the tip of the spindle part to removably fix and hold the cutting tool, and a chuck that is arranged at the rear end of the spindle part and that is arranged in the circumferential direction of the cutting tool.
The indexing part for indexing the blade and the outer peripheral surface of the spindle part
A roller pressed against the spindle in the diametrical direction
And hold this roller rotatably and turn it on the body
Roller roller bearings placed in the
Rotatably arranged is to perform a rotation operation of the roller rotary bearing, roller axis and the spindle of the spindle unit
There a roller rotating plate to set the angle between the tangent of the roller at the point of pressure contact, the spindle portion is axially
When moving to the
The rotation is given according to the described angle .

[0007]

The present invention has the following functions due to the above-mentioned structure. The cutting tool is fixed and held by a chuck at the tip of the spindle portion.

[0008] When performing grinding of the cutting tool having a linear cutting edge, and a roller rotary bearing is rotating displacement by rotation operation of the roller rotation plate, the axis corresponding spin of the spindle portion
The roller at the point where the roller presses against the needle part
Set the direction of rotation of the roller so that it is parallel to the tangent line of (1) and the axial direction of the spindle section. In this way,
When the spindle part is moved in the axial direction, the spindle part is guided linearly by the rollers, and the cutting tool is sent out without linearly rotating in the axial direction.

[0009] When performing the grinding of the cutting tool having a twisted blade, and a roller rotary bearing is rotating displacement by rotation operation of the roller rotation plate, the axis the scan of the spindle portion
The roller at the point where it comes into pressure contact with the pindle
In accordance with the angle of the blade twist angle between the tangent line of over setting the direction of rotation of the rollers in hand office directed predetermined angle relative to the axial direction of the spindle unit. In this way, when the spindle part is moved in the axial direction, rotation is applied to the spindle part according to the twist angle of the cutting tool and is sent, while the cutting tool rotates along the twist angle. Sent out.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. 1A and 1B show a configuration of a first embodiment of the present invention, in which FIG. 1A is a plan view thereof, FIG. 1B is a sectional front view, and FIG. 1C is a sectional side view.

In FIGS. 1 (b) and 1 (c), reference numeral 1 is a box-shaped body having an opening 2 in the center of its upper surface and bearings 3a, 3b in the center of both side surfaces. Reference numeral 4 denotes a spindle portion, which is arranged on the body 1 via bearings 3a and 3b so as to be movable in the axial direction. A chuck 5 for removably fixing and holding a cutting tool is attached to the chuck fixing portion 6 arranged on the rear end side of the spindle portion 4 via a screw in the tip portion of the spindle portion 4. The cutting tool can be attached to and detached from the chuck 5 by rotating the chuck fixing portion 6. Numeral 7 is an indexing part arranged at the rear end of the spindle part 4, fixed via a pin 8 and rotatable freely with the spindle part 4, and the indexing of the number of blades of the tool at the rear end part. It is possible. Reference numeral 9 denotes a roller, which has roller shafts 9a integrally on both sides of the central portion thereof. Reference numeral 10 denotes a roller rotary bearing having a cylindrical shaft 10a at the center of the upper surface. The roller 9 is rotatably assembled to the roller rotary bearing 10 via the roller shaft 9a as shown in FIG. 1 (c). Has been. Reference numeral 11 is a thrust bearing, 12 is a spring, and 13 is a spring bearing having a shaft insertion hole 13a at the center. 14 rotating base, 1
5 is a roller roller having a shaft insertion hole 15a in the center
It is a moving board. Is fixed through the rotating base <br/> over scan 14 screw 16 in the opening 2 edge of the body 1 the upper surface, with roller rotary bearing 10 which is pivotally supported roller 9 in the opening 2 is arranged, the roller thrust bearing 11 between the rotary bearing 10, spring bearing 13 on the rotating base 14 via a spring 12 is inserted through the shaft 10a of the roller rotary bearing 10 to the shaft insertion hole 13a is fixed by screws 17, it is compressed The roller rotation bearing 10 is pressed toward the spindle portion 4 side by the urging force of the spring 12 so that the roller 9 is placed on the spindle portion 4 and the diameter of the spindle portion 4 is increased.
It is assembled in a state of pressure contact from the direction . And
Pivoting base 14 Roller rotating plate 1 on the top of the spring bearing 13
5 is installed by inserting the shaft 10a of the roller rotary bearing 10 into the shaft insertion hole 15a, fastening the screw 18 to the shaft 10a inserted through the shaft insertion hole 15a, and using the screw pin 10c screwed to the lateral screw 10b. by contacting the 10a, the roller rotating plate 1
5 and the roller rotary bearing 10 are integrally assembled. Accordingly, the rotation operation of the roller rotation plate 15, the roller rotary bearing 10 is moving integrally twice, roller 9
Direction of rotation , that is, the axis of the spindle unit 4 and the
The roller at the point where the roller 9 is pressed against the pindle part 4
And the tangent of Ra 9 can be set to an angle. FIG. 1 (a)
In, 19 is as a mark displayed on a roller rotating plate 15, toward <br/> returning rotating direction and rollers 9 pointing the match. Reference numeral 20 is an angle scale displayed on the edge of the spring bridge 13.

Next, the operation of the above embodiment will be described with reference to FIGS. First, an example of grinding a cutting tool having a linear blade such as a reamer will be described with reference to FIG.
In FIG. 2, first, the cutting tool 21 is attached to the chuck 5. This attachment is performed by rotating the chuck fixing part 6. The indexing of one blade in the circumferential direction of the tool 21 is performed by rotating the indexing section 7. By aligning the mark 19 of the roller pivot plate 15 in the center of the angular scale 20 Next, the axis of the spindle unit 4 and the
At the point where the roller 9 is pressed against the spindle portion 4,
The tangential line of the roller 9 is made parallel and the rotating direction of the roller 9 is matched with the axial direction of the cutting tool 21. After that, when the spindle unit 4 is moved in the axial direction, the spindle unit 4 is guided by the roller 9 and is linearly fed in accordance with the direction 9 in which the roller rotates without rotating. Therefore, by setting the grindstone of the grinder along the cutting edge and feeding the spindle portion 4 by the length of the edge of the cutting tool 21, the grinding can be performed accurately along the straight edge.

Next, a grinding example of a cutting tool having a twisting blade such as an end mill will be described with reference to FIGS. 3, 4 and 5. In FIG. 3, first, the cutting tool 31 is attached to the chuck 5 by rotating the chuck fixing portion 6. The indexing is performed by rotating the indexing section 7 as described above . Then mark 1 of the roller rotation plate 15
By adjusting 9 to the angle scale 20 corresponding to the twist angle of the tool 31, the axis line of the spindle unit 4
And at the point where the roller 9 comes into pressure contact with the spindle part 4 concerned.
The angle with the tangent of the roller 9
In addition, the direction in which the roller 9 rotates is matched with the twist angle of the tool 31. After this, as shown in FIG. 4, the grindstone 40 of the grinder is set along the cutting blade 32, and the spindle unit 4 is moved in the axial direction by the length of the blade for grinding the tool 31. The part 4 is guided by the roller 9 and is fed out while rotating, and the tool 31 is fed out while being rotated according to the twist angle. Therefore, FIG.
As shown in (a) and (b), the grindstone 40 accurately grinds the outer peripheral flank of the tool 31 along its lead angle.

As described above, according to the first embodiment,
It has a box-shaped body 1 and bearings 3 on both sides of the body 1.
The spindle unit 4 is arranged so as to be movable in the axial direction via a and 3b, and the spindle unit 4 is mounted on the outer peripheral surface of the spindle unit 4.
A roller 9 which is pressed against the radial direction of the pole tip, the low
A roller rotation bearing 10 for rotatably holding the roller 9,
Disposed in the body 1 the upper surface, is connected to the shaft 10a of the roller rotary bearing 10, and a roller rotating plate 15 for setting the direction of rotation of the roller 9 by the rotating operation, the rollers of the cutting tool set times is obtained by so guided in the direction of rotation of the rollers 9 by the operation of the dynamic plate 15 sends the addition of rotating to fit the linear or twist angle, receiving a conventional blade such as is required,
Unlike the case of using a blade receiver, even if a grindstone is pressed against a cutting tool and ground, the tool does not float, and the cutting tool can be surely ground without damage. Such a tool feeding method can be used not only for re-grinding but also for new production. Also, due to the structure,
There is also an advantage that the entire device can be made small.

6A and 6B show the construction of the second embodiment of the present invention. FIG. 6A is a plan view thereof, FIG. 6B is a front sectional view, and FIG. 6C is a side sectional view. In contrast to the first embodiment in which the spindle portion is guided by one roller, the second embodiment is different in that it is guided by four rollers. Here, the same elements as those in the first embodiment will be designated by the same reference numerals and the description thereof will be omitted, and different elements will be denoted by new reference numerals and described.

In FIG. 6, each of 71 is a roller device, which has a roller 72 and a roller rotary bearing 73 that pivotally supports the roller 72 via a roller shaft 72a. Further, similarly to the first embodiment, each roller 72 is attached to the spindle unit 4 via the thrust bearing 74 and the spring 75.
It is assembled in a state of pressure contact from the diametrical direction .
A gear 76 is attached to the shaft 73a of the roller rotary bearing 73.
have. 77 is a circular pivoting gear, the periphery of the spindle 4 via a rotation gear bearing 78 is arranged pivotably, meshed with the gear 76 of the shaft 73a of each roller rotational bearing 73. 79 is a pivoting gear body formed on one upper body has an opening 80 at its upper central portion. 81 is a roller rotating plate, rotating Giyabode <br/> and on the upper surface opening 80 of I 79 pivotably mounted, attached via a rotating shaft 82 screw 83 on its lower surface central portion ing. The rotating shaft 82 has a helix angle variable gear 84 in a lower portion, and is engaged in rotation gear 77 in the rotation gear body 79. In addition, 85 is a mark and 86 is an angle scale.

In such a structure, first, the roller rotation is performed.
Angle scale 86 and the mark 85 is the dynamic plate 81 is rotating
Together the center of rotation shaft 82 Te <br/> follow the rotation of the roller rotation plate 81 is pivoted, by rotating the rotating gear 77 through the helix angle variable gear 84, the rotation orientation roller rotary bearing 73 of the roller unit 71 by the rotation of the gear 77 rotates the roller 72 is rotating in a predetermined direction is aligned in the axial direction of the spindle unit 4. Therefore,
Fix the tool to the spindle part 4 via the chuck 5,
When the spindle unit 4 is moved in the axial direction, the spindle unit 4 is guided by the four rollers 72 and linearly moves in the axial direction, and the tool is fed linearly without rotating.

[0018] Then align the roller rotation plate 81 rotating to the mark 85 in accordance with the helix angle of the tool in a predetermined position of the angular scale 86, the rotation shaft rotation of the roller rotation plate 81 helix angle variable gear 84 of 82, a roller rotary bearing 73 through rotation gear 77 is predetermined angular rotation, the direction of rotation of the rollers 72 is set to a predetermined direction by a predetermined angle in response to the twist angle of the tool.

Therefore, when the tool is fixed to the spindle section 4 via the chuck 5 and the spindle section 4 is moved in the axial direction, the spindle section 4 is guided by the four rollers 72, and the tool is twisted. Send it out while rotating according to the corner.

As described above, according to the second embodiment, the box-shaped body 1 is provided, and the bearings 3 are provided on both side surfaces of the body 1.
The spindle unit 4 is arranged so as to be movable in the axial direction via a and 3b, and the spindle unit 4 is mounted on the outer peripheral surface of the spindle unit 4.
Four rollers 72 pressed against each other in the diametrical direction
And a roller that rotatably holds these rollers 72
A rotary bearing 73, of each roller 72 by the rotation operation is connected through a gear mechanism to the roller rotary bearing 73
And a roller rotating plate 81 to set the rotating direction,
The cutting tool has been set is obtained by so feeding the addition of rotating to fit the linear or helix angle to guide the direction of rotation of each roller 72 by the operation of the roller rotation plate 81, the first It is possible to obtain the same effects as those of the embodiment described above, and it is possible to more reliably apply rotation corresponding to the twist angle to the tool by the amount of the four rollers 72.

[0021]

As described above in detail, according to the present invention, a spindle unit having a box-shaped body and arranged on both side surfaces of the body so as to be axially movable via bearings, and a spindle unit Chuck attached to the tip of the tool to detachably fix the cutting tool, and the rear end of the spindle
On the outer peripheral surface of the spindle section and the indexing section
A roller that is pressed against the spindle from the diametrical direction and a rotatably held roller that can be rotated around the body.
Roller roller bearings placed in the
Rotatably arranged is to perform a rotation operation of the roller rotary bearing, a roller pivot plate to set-out direction <br/> to rotation of the rollers relative to the axis of the spindle portion, and fixedly holding the cutting tool, If it is a cutting tool with a straight edge such as a side milling cutter, it is fed straight without being rotated in the axial direction, and if it is a cutting tool with a twisting edge such as a flat milling cutter or end mill, its twist Since it is sent out in the axial direction while rotating according to the angle,
Unlike conventional blade receivers, the blade holder does not lift up even if a grindstone is pressed against the cutting tool and grinds it without damaging the cutting tool. It can be used not only for re-grinding but also for new fabrication. There is also an advantage that the entire device can be made smaller.

[Brief description of drawings]

FIG. 1 (a) is a plan view of a tool feeding device for a tool grinding machine according to a first embodiment of the present invention (b) is a front sectional view of the same device, and (c) is a side sectional view of the same device.

In Figure 2 the apparatus, a plan view showing a state where the cutting tool is fixed to orient the rotation of the rollers by rotation operation of the roller rotation plate in the axial direction of the tool with a straight edge to the spindle unit

[3] In the apparatus, a plan view showing a state where the cutting tool is fixed to orient the rotation of the rollers by rotation operation of the roller rotation plate twist angle of the tool having a twisted blade to a spindle portion

FIG. 4 is a plan view showing a state in which a grindstone of the grinder is set in FIG.

5A is a partially omitted plan view showing a state before sending out a tool in FIG. 4; FIG. 5B is a partially omitted plan view showing a state where a tool is sent out in FIG. 4;

6A is a plan view of a tool feeding device for a tool grinding machine according to a second embodiment of the present invention, FIG. 6B is a front sectional view of the same device, and FIG. 6C is a side sectional view of the same device.

[Explanation of symbols]

1 body 2 opening 3a, 3b bearing 4 spindle part 5 Chuck 6 chuck fixing part 7 indexing unit 8 pin 9 roller 9a roller shaft 10 roller rotary bearing 10a shaft 11 thrust bearing 12 spring 13 spring receiver 13a shaft insertion hole 14 rotation base 15 roller rotating plate 15a shaft insertion holes 16, 17, 18, screws 19 marks 20 angle scale 21 reamer (straight blade cutting tool having a) 31 end mill (cutting tool having a twisted blade) 32 cutting edge 40 grinding wheel 71 the roller units 72 roller 72a roller shaft 73 roller rotary bearing 73a shaft 74 thrust bearing 75 spring 76 gear 77 rotating gear 78 rotating gear bearing 79 turning gear body 80 opening 81 roller rotating plate 82 rotating shafts To 83 screw 84 variable twist angle gear 85 mark 86 angle scale

Claims (1)

(57) [Claims] 1. A spindle unit having a box-shaped body, which is arranged on both side surfaces of the body so as to be movable in the axial direction through bearings, and a cutting tool attached to the tip of the spindle unit. A chuck that is detachably fixed and held, and a periphery of the cutting tool that is arranged at the rear end of the spindle section.
And indexing section determining the first blade in the direction, the spin
On the outer peripheral surface of the spindle part from the diameter direction of the spindle part
Pressed roller and rotatably hold this roller
And a roller rotation shaft rotatably arranged on the body.
And receiving, performs rotation operation of the roller rotary bearing part pivotably disposed in said body, said spindle portion
The axis of the roller and the point where the roller comes into pressure contact with the spindle.
And a roller rotating plate to set the angle between the tangent line of the roller in to move the spindle unit in the axial direction
When the roller is rotated,
A tool feed device for a tool grinder that gives rotation according to the degree .