JP3328060B2 - Rotary grinding wheel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary grinding wheel constructed by integrally joining a plurality of segment grinding wheels to an outer peripheral surface of a grinding wheel main body.

[0002]

2. Description of the Related Art Conventionally, a plurality of segment grindstones have been integrally joined to the outer surface of a grinding wheel body to form a grinding surface with the outer surface thereof, and a grinding liquid supply liquid has been opened on the outer surface. There is a rotary grinding wheel that increases the lubricity and cooling of the contact surface between the grinding surface and the workpiece by supplying the grinding fluid to the grinding surface of the segment grinding wheel by centrifugal force caused by the rotation of the main body (for example, a real grinding wheel). 1-1155167).

[0003]

However, in the conventional rotary grinding wheel, a plurality of segmented grinding wheels arranged in tandem are provided with a grinding fluid supply opening between opposing edges of mutually adjacent ones. A gap is formed,
Since the supply ports are arranged in a straight line at a relatively high pitch along the circumferential direction of the grinding surface of the segment grinding wheels, the grinding surface composed of multiple segment grinding wheels becomes a discontinuous surface and the workpiece is ground. Not only does the finishing accuracy of the surface deteriorate, but there is a problem that a linear streak is formed on the ground surface of the work by the grinding fluid supply port.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its main object to form a grinding surface made of a segment grinding wheel into a substantially continuous surface and to grind a work surface to be ground. An object of the present invention is to provide a new rotary grinding wheel in which a streak due to a liquid supply port is not formed.

[0005]

The object of the present invention is to form a grinding surface by arranging a plurality of square segment whetstones in tandem on the outer peripheral surface of a grinding wheel main body. In the rotating grinding wheel, each of the segment grinding wheels has a first edge which becomes one circumferential edge when the grinding wheel is arranged on the outer peripheral surface of the grinding wheel main body, and a center of the edge. A second notch formed at a position offset from a center position of the second notch having a first notch portion formed at the position, and a second edge serving as the other circumferential edge. The same configuration having a portion, the segment grindstone has a first principal surface of the grindstone as a grinding surface, and a first arrangement in which the first edge is located in front of one side in the rotation direction of the grinding wheel body. So that the second notches are aligned with the segment grindstones in the first arrangement. A first combination arrangement having a contacting second arrangement, the other main surface of the segment grinding wheel being a grinding surface, and the first edge being located in front of one of the rotation directions of the grinding wheel main body. A third arrangement, and the third arrangement
And a second combination arrangement having a fourth arrangement in which the second notch portions are in contact with the segment grindstones in the arrangement of (2) so as to align with each other. This is achieved by providing a rotary grinding wheel characterized in that the first notch portions and the second notch portions form a grinding fluid supply port.

[0006]

In this way, the grinding fluid can be supplied evenly and reliably to the contact surface between the grinding surface and the work, and the grinding surface can be formed as a substantially continuous surface. Also, since the grinding fluid supply port repeats three different positions in the rotation axis direction of the rotary grinding wheel in any order along the circumferential direction, the grinding fluid supply arranged in the same row in the rotation axis direction Take relatively long intervals in the circumferential direction of the port (a grinding fluid supply port offset from the center of the width in the rotation axis direction is one for each even number of segment grinding wheels, and a grinding fluid supply port along the center is two segment grinding wheels. One for each). Furthermore, since only one kind of segment grindstone is repeated in four different arrangements (front, back, front, back, front and back), the manufacturing cost of the segment grindstone does not increase.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a partial cutaway perspective view of a rotary grinding wheel to which the present invention is applied, and FIG. 2 is a II-I of FIG.
FIG. 4 is a longitudinal sectional view as seen from a line I. The grinding wheel main body 1 is formed in a disk shape from a metal material such as an aluminum alloy, and has an outer peripheral surface on which segment whetstones 9 described later are arranged in tandem.
A shaft hole 2 is formed at a center portion of the shaft hole 2 into which a grindstone shaft (not shown) is fitted. Also, on one end face 4 in the axial direction of the grinding wheel body 1,
An annular grinding fluid gutter 5 is formed coaxially with the shaft hole 2 over the entire circumference. As shown in FIG. 2, the inside of the grinding fluid gutter 5 has a diameter which is larger in the outer peripheral direction than the opening 5 a, thereby forming a fluid reservoir 5 b.

A plurality of first to third grinding fluid supply paths 6 to 8 are provided between the fluid reservoir 5 b of the grinding fluid gutter 5 and the grinding wheel joining surface 3 at intervals in the circumferential direction of the grinding wheel main body 1. Are radially drilled. As shown well in FIG.
8, an opening 6 a of the grinding fluid supply passage 6 on the side of the grindstone joining surface 3
Is provided at a position offset from the center position L of the width of the grinding wheel main body 1 in the rotation axis direction to a side opposite to the end face 4. The opening 7 a of the grinding fluid supply path 7 on the grinding wheel joining surface 3 side is provided with the grinding wheel main body 1. The opening 8a is provided at a position coinciding with the center position L of the width in the rotation axis direction, and further has an opening 8a on the grinding wheel joint surface 3 side of the grinding fluid supply path 8.
Is provided at a position offset toward the end face 4 from the center position L of the width of the grinding wheel main body 1 in the rotation axis direction.

When the grinding wheel main body 1 is mounted on a grinding machine, a jet nozzle of a grinding fluid supply pipe P is provided at the opening 5a of the grinding fluid gutter 5 as shown by an imaginary line in FIG. When the jetted grinding fluid flows into the grinding fluid gutter 5, it accumulates in the fluid reservoir 5 b, receives centrifugal force from the rotation of the grinding wheel main body 1, and is supplied to the grinding wheel joint surface 3 through each of the grinding supply paths 6 to 8. Become like

On the other hand, as shown in FIG. 3, the segment grindstones 9 arranged on the grindstone joining surface 3 are formed by a known grindstone material such as CBN or diamond into a square shape having longer sides along the circumferential direction. Both of the main surfaces 9a and 9b are similarly formed as grindstone surfaces. Further, a position along the center line L passing through the first edge 9c, which is one circumferential edge when the segment grinding wheels 9 are arranged on the outer peripheral surface of the grinding wheel main body, that is, the edge 9c Is formed at the center position of the first notch 10a in a semicircular shape, and is offset from the center line L at the second edge 9d which is the other circumferential edge, that is, the edge 9d A semi-circular second notch 10b is formed at a position offset from the center position of.

As shown in FIG. 4, the segment grinding wheels 9 configured as described above are arranged endlessly in a row with an adhesive 14 over the entire circumference of the grinding wheel joining surface 3 on the outer periphery of the grinding wheel body 1. Are joined. At this time, the segment grinding wheels 9 adjacent to each other abut against each other so as not to form a gap between them.

Here, as shown in FIG. 5 in which the arrangement of the segment grinding wheels 9 is developed from the outer peripheral side of the rotary grinding wheel, each of the segment grinding wheels 9 has one main surface 9a as a grinding surface. In addition, a first arrangement in which the first edge 9c is located forward (upper side in FIG. 5) in the rotation direction of the grinding wheel main body 1 indicated by an arrow A, and a second end of the segment grindstone 9 in the first arrangement. Similarly, the second notch portion 10b is aligned with the second notch portion 10b of the edge 9d, that is, the other main surface 9b of the segment grindstone 9 is used as a grinding surface, and the grinding wheel body 1 is rotated forward in the rotation direction. A first combination arrangement including a second arrangement in which the second end edge 9d is located; and a second main surface 9b of the segment grindstone 9 serving as a grinding surface, and a second combination arrangement arranged in front of the grinding wheel main body 1 in the rotation direction. A third arrangement in which one edge 9c is located;
The second notch 10b is also aligned with the second notch 10b of the second edge 9d of the segment grindstone 9 having the above arrangement, that is, one main surface 9a of the segment grindstone 9 is set as a grinding surface. The second combination arrangement consisting of the fourth arrangement in which the second end edge 9d is located forward in the rotation direction of the grinding wheel main body 1 is repeated in order. With this arrangement, the semi-circular first notches 10 a are aligned with each other at the position of the opening 7 a on the grindstone joining surface 3 side of the grinding fluid supply path 7 to form a circular grinding fluid supply port 11. Further, the semi-circular second notches 10 b are located at the position of the opening 7 a of the grinding fluid supply path 7 on the side of the grinding wheel joint surface 3 and the opening 8 of the grinding fluid supply path 8 on the side of the grinding stone joint surface 3.
A circular grinding fluid supply ports 12 and 13 aligned at the position a
Has made.

That is, the grinding fluid supply port 11 coincides with the rotational axis direction width center position L of the grinding wheel body 1, and the grinding liquid is offset from the rotational axis direction width center position L of the grinding wheel body 1 to the side opposite to the end face 4. The supply port 12, the grinding liquid supply port 11, the grinding liquid supply port 13, the grinding liquid supply port 11, the grinding liquid supply port 12 offset from the center L of the width of the grinding wheel body 1 in the rotation axis direction toward the end face 4, and so on. The grinding fluid supply ports 11 are arranged every two segment whetstones, and the grinding fluid supply ports 12 and 13 are arranged every four segment whetstones.

In this embodiment, the first combination arrangement (first arrangement + second arrangement) and the second combination arrangement (third arrangement + fourth arrangement) are repeated in order. However, even if the combination arrangements are repeated in any order, for example, the first combination arrangement, the first combination arrangement, the second combination arrangement, the second combination arrangement, etc. good.

As described above, a polygonal grindstone surface is formed by the group of segment grindstones 9 adhered to the grindstone joining surface 3 on the outer periphery of the grindstone wheel body 1, and the polygonal grindstone surface is formed with an appropriate finishing tool as shown in FIG.
The grinding wheel 15 is completed by finishing a smooth circumferential surface 15 as shown in FIG.

FIG. 7 shows a molding die 20 for molding the segment grindstone 9. The molding die 20 is formed of a rectangular box-shaped frame, and the longitudinal end of the molding hole 21 is formed on one end surface of the molding hole 21 in the longitudinal direction so as to form the first notch 10 a of the segment grinding stone 9. A first semicircular convex portion 22 is projected along the center line L in the direction, and the other end face in the longitudinal direction is offset from the center line L to form the second cutout portion 10b in the second semi-circular convex portion. A semicircular convex portion 23 is provided so as to protrude. Then, using this mold M, the segment grindstone 9 is formed by a known molding method such as a powder molding method and an extrusion molding method. Since the above-mentioned segment grindstones 20 all have the same shape and are merely changed in arrangement, all the segment grindstones 9 to be joined to the grinding wheel main body 1 can be formed by this molding die 20. It has become.

Hereinafter, the operation of this embodiment will be described in detail.

The rotary grinding wheel manufactured in the above-described manner has its shaft hole 2 attached to a rotary shaft of a grinding machine and is rotated to be used for grinding a surface to be ground of various works. At this time, the grinding fluid supplied from the jet nozzle of the grinding fluid supply pipe P disposed on the side of the rotary grinding wheel is supplied to the grinding fluid gutter 5.
The centrifugal force caused by the rotation of the rotary grinding wheel is stored in the grinding fluid reservoir 5b, and each of the grinding fluid supply paths 6 to 8 is supplied therefrom.
A plurality of grinding fluid supply ports 11 opening in three rows from the outlets 6a, 7a, 8a to the grinding surface 15 of the group of segment grinding wheels 9 through
~ 13. The grinding fluid can be supplied uniformly and stably to the contact surface between the grinding surface 15 and the surface to be ground of the work, and the grinding surface 15 can be supplied with a relatively small amount of grinding fluid.
Cooling, lubrication, removal of chips, and the like of the contact surface between the workpiece and the workpiece can be efficiently and reliably performed. Also, a plurality of grinding fluid supply ports 11 to 13 are arranged in the circumferential direction on the grinding surface 15 of the rotary grinding wheel in three rows, and the circumferential spacing of the grinding fluid supply ports 11 aligned in a line is made long. By doing so, no linear streak due to the grinding fluid supply port is formed on the surface to be ground of the work.

Further, in producing a rotary grinding wheel,
Since the same-shaped segment grindstones 9 may be alternately arranged on the grindstone bonding surface 3 of the grindstone wheel main body 1 in four different arrangements on the front and back surfaces, the manufacture thereof becomes extremely easy.

[0021]

As is apparent from the above description, according to the rotary grinding wheel according to the present invention, each segment grinding wheel is
A first notch formed at a central position of the edge, the first edge being one circumferential edge when the grinding wheel is disposed on the outer peripheral surface of the grinding wheel main body, and A second notch formed at a position offset from a center line passing through the second edge, which is the other edge in the circumferential direction, is provided. Combination (see table above,
By repeatedly arranging the back surface, the front surface, and the back surface), the grinding fluid can be evenly and reliably supplied to the contact surface between the grinding surface and the work, and the cooling and lubricating properties of the contact surface can be improved. Chips can be effectively eliminated. In addition, since the grinding fluid supply port repeats three positions different from each other in the rotation axis direction of the rotary grinding wheel in order along the circumferential direction, the grinding fluid supply ports arranged in the same row in the rotation axis direction. A relatively long circumferential interval can be provided, and the grinding surface can be formed to be substantially continuous, so that no streak due to the grinding fluid supply port remains on the work. Furthermore, since only one kind of segment grindstone is repeated in four different arrangements (front, back, front, back, front and back), the manufacturing cost of the segment grindstone does not increase.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire grinding rotary grindstone to which the present invention is applied.

FIG. 2 is a vertical cross-sectional view of the grinding wheel shown in FIG. 1 taken along line II-II.

FIG. 3 is a perspective view of a segment grinding wheel.

FIG. 4 is a partial perspective view showing a state where a segment grinding wheel is joined to the grinding wheel main body.

FIG. 5 is a plan view in which the arrangement state of the segment grinding wheels 9 is developed from the direction of arrow V in FIG.

FIG. 6 is a partial side view showing the completed rotary grinding wheel.

FIG. 7 is a perspective view showing a mold for forming a segment grinding wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grinding wheel main body 2 Shaft hole 3 Grinding stone joining surface 4 End face 5 Grinding fluid gutter 5a Opening 5b Grinding fluid reservoir 6-8 Grinding fluid supply passage 6a, 7a, 8a Grinding fluid outlet 9 Segment grindstone 9a One main surface 9b The other main surface Surface 9c 1st edge 9d 2nd edge 10a 1st notch 10b 2nd notch 11-13 Grinding fluid supply port 14 Adhesive 15 Grinding surface 20 Mold 21 Molding hole 22 First 23 Second semi-circular projection of

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinsuke Kota 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside the Honda R & D Co., Ltd. (72) Inventor Akira Kaburagi 1-4-1 Chuo, Wako-shi, Saitama Stock (56) References JP-A-7-96466 (JP, A) JP-A-62-107978 (JP, A) JP-A-1-155167 (JP, U) (58) Fields surveyed ( Int.Cl. ⁷ , DB name) B24D 5/00 B24D 5/06 B24D 5/10

Claims (1)

(57) [Claims] 1. A rotary grinding wheel having a plurality of square segment grinding wheels arranged in tandem on an outer peripheral surface of a grinding wheel body to form a grinding surface, and a grinding fluid supply port opened in the grinding surface. Each of the segment whetstones has a first cutting edge formed at a central position of the first wedge, which is one circumferential end when the whetstone is disposed on the outer peripheral surface of the whetstone wheel main body. A second edge having a notch and being formed at a position offset from a center position of the edge at a second edge serving as the other circumferential edge.
The segment whetstone has one main surface of the whetstone as a grinding surface, and the first end edge is located in front of one of the rotation directions of the grinding wheel main body. And a second combination arrangement having a second arrangement in which the second notches are in contact with the segment grindstones in the first arrangement so as to be aligned with each other. A third surface in which the first edge is located in front of one side in the rotation direction of the grinding wheel body, and a second notch in the segment grinding wheel in the third position. And a second combination arrangement having a fourth arrangement in which the parts are in contact with each other so as to be aligned with each other. Make sure that the grinding fluid supply port is Rotating grinding wheel and butterflies.