JPH03117553A - Gear type grinding tool - Google Patents
Gear type grinding toolInfo
- Publication number
- JPH03117553A JPH03117553A JP25057789A JP25057789A JPH03117553A JP H03117553 A JPH03117553 A JP H03117553A JP 25057789 A JP25057789 A JP 25057789A JP 25057789 A JP25057789 A JP 25057789A JP H03117553 A JPH03117553 A JP H03117553A
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- tool
- gear
- tip
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000004195 gingiva Anatomy 0.000 claims description 7
- 238000000034 method Methods 0.000 description 6
- 239000006061 abrasive grain Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/03—Honing tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は歯車などの仕上加工に供される歯車型研削工具
に関し、詳しくはその寿命向上を図るようにしたもので
ある。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a gear-shaped grinding tool used for finishing processing of gears, etc., and more specifically, to a gear-shaped grinding tool designed to improve the life of the tool.
〈従来の技術〉
歯車の仕上加工に供される工具に歯車型研削工具（以下
、単に工具と称す）がある、この工具は結合剤を用いる
ことにより砥粒を歯車の形状に形成したもので、その使
用法は第５図に示すように、シェービングカッタと略同
様である。すなわち、工具１を被研削歯車（以下、歯車
）２に対して適切な軸交差角θを与えて噛み合わせ、工
具１と歯車２とのどちらかを回転させる。すると、工具
１と歯車２とのそれぞれの歯面間には滑りが生じ、歯車
２の歯面が研削されるのである。<Prior art> A gear type grinding tool (hereinafter simply referred to as a tool) is a tool used for finishing gears. This tool is made by forming abrasive grains into the shape of a gear using a bonding agent. , its usage is almost the same as that of a shaving cutter, as shown in FIG. That is, the tool 1 is meshed with the gear to be ground (hereinafter referred to as gear) 2 with an appropriate axis intersection angle θ, and either the tool 1 or the gear 2 is rotated. Then, slippage occurs between the tooth surfaces of the tool 1 and the gear 2, and the tooth surfaces of the gear 2 are ground.
歯車２を所望の寸法に仕上げるには、工具１と歯車２の
各々を支持する工具軸３と歯車軸４間の距離を徐々に小
さくして行くプランジカット法の他、工具１を歯車軸４
と平行に送るコンベンショナルカット法、工具１を歯車
軸３に対し斜めに送るダイアゴナルカット法、工具１を
歯車２の歯厚方向に移動させて行く方法など種々の方法
が用いられている。In order to finish the gear 2 to desired dimensions, in addition to the plunge cutting method in which the distance between the tool shaft 3 and the gear shaft 4 that support each of the tool 1 and the gear 2 is gradually reduced, the tool 1 can be finished on the gear shaft 4.
Various methods are used, such as a conventional cutting method in which the tool 1 is fed parallel to the gear shaft 3, a diagonal cutting method in which the tool 1 is fed diagonally with respect to the gear shaft 3, and a method in which the tool 1 is moved in the tooth thickness direction of the gear 2.
〈発明が解決しようとする課題〉
ところで、以上述べた加工方法では、いずれの場合にも
、工具１の歯部５が歯車２の歯面６に対して第６図に示
すように円弧状の軌跡を描いて研削加工が行われ、図中
にハツチングを施した部位が加工領域７となる。そのた
め、必然的に歯部５の先端すなわち歯先部８が最も加工
量が大きく、摩耗（砥粒の脱落）も該部が他の部位に比
べて大きかった。<Problems to be Solved by the Invention> Incidentally, in any of the processing methods described above, the tooth portion 5 of the tool 1 has an arc-shaped shape with respect to the tooth surface 6 of the gear 2 as shown in FIG. Grinding is performed by drawing a trajectory, and the hatched area in the figure becomes the processing area 7. Therefore, the tip of the tooth portion 5, that is, the tip portion 8, was necessarily subjected to the largest amount of machining, and the wear (dropping of abrasive grains) was greater in this portion than in other portions.
この工具１はその一部が磨耗しても研削された歯車２の
仕上がり形状に大きな影響を与える。しかも、通常の砥
石車のようにドレッサによってその形状を修復すること
が殆んど不可能である。したがって、全体的には摩耗が
進行していない状態でも、歯先部８のみが磨耗した場合
には工具１全体の交換を余儀なくされていた。Even if a part of the tool 1 is worn out, it has a great influence on the finished shape of the ground gear 2. Moreover, it is almost impossible to restore its shape with a dresser like a normal grinding wheel. Therefore, even if the overall wear has not progressed, if only the tooth tips 8 are worn, the entire tool 1 has to be replaced.
本発明は上記状況に鑑みなされたもので、歯先部の摩耗
を低減させることにより工具自体の寿命を向上させるこ
とを目的とする。The present invention was made in view of the above situation, and an object of the present invention is to improve the life of the tool itself by reducing the wear on the tooth tips.
く課題を解決するための手段〉
そこで、本発明ではこの課題を解決するために、歯先部
における歯先面と歯面との交線部の歯肉を除去したこと
を特徴とする歯車型研削工具を提案するものである。Means for Solving the Problem> Therefore, in order to solve this problem, the present invention provides a gear type grinding device characterized in that the gingiva at the intersection line between the tooth tip surface and the tooth surface in the tooth tip portion is removed. This is a proposal for tools.
〈作用〉
工具の歯部が歯車に対して円弧状の軌跡を描いて研削を
行っても、歯先部における歯先面と歯面との交線部の歯
肉が除去されているため、局部的な摩耗が起こらなくな
る。<Operation> Even when grinding is performed with the tooth part of the tool tracing an arc-shaped trajectory relative to the gear, the gingiva at the intersection line between the tooth tip surface and the tooth surface at the tooth tip part is removed. This prevents wear and tear from occurring.
〈実施例〉
本発明の幾つかの実施例を図面に基づき具体的に説明す
る。尚、実施例の説明にあたっては前述した従来の例に
おける部材と同一の部材に同一の符号を付し、重複する
説明を省略する。<Examples> Several examples of the present invention will be specifically described based on the drawings. In the description of the embodiment, the same members as those in the conventional example described above will be denoted by the same reference numerals, and redundant explanation will be omitted.
第１図には本発明に係る歯車型研削工具の第１実施例の
部分斜視を示し、第２図にはこの実施例における歯部の
拡大断面を示しである
これらの図に示すように、本実施例の工具１では歯先部
８における歯先面９と左右両歯面１０との交線部の歯肉
が除去され、いわゆる角Ｒ（以下、単にＲ）１１が形成
されている。Ｒの形状は左右対称となっており、正規の
インボリュート（第２図に二点鎖線で示す）に対して逃
げ１２の量が順次増加する形状に設定されている。第２
図中、１３は砥粒であり、１４は結合剤である。FIG. 1 shows a partial perspective view of a first embodiment of a gear type grinding tool according to the present invention, and FIG. 2 shows an enlarged cross-section of a tooth portion in this embodiment. As shown in these figures, In the tool 1 of this embodiment, the gingiva at the intersection of the tooth tip surface 9 and both left and right tooth surfaces 10 in the tooth tip portion 8 is removed, and a so-called corner R (hereinafter simply referred to as R) 11 is formed. The shape of R is bilaterally symmetrical, and is set in such a shape that the amount of relief 12 increases sequentially with respect to a regular involute (shown by a two-dot chain line in FIG. 2). Second
In the figure, 13 is an abrasive grain, and 14 is a binder.
本実施例では、上述のように工具１にＲ１１が形成され
ているため、歯車２との噛み合いにおいては砥粒１３が
歯先部８側から歯面１０側に向かい徐々に且つ比較的大
面積で接触する。したがって、加工時における歯部５の
研削負担は平均化され、従来のように歯先部８のみが異
常に磨耗することがなくなった。In this embodiment, since R11 is formed in the tool 1 as described above, when meshing with the gear 2, the abrasive grains 13 gradually move from the tooth tip 8 side toward the tooth flank 10 side and over a relatively large area. Contact with. Therefore, the grinding load on the tooth portion 5 during machining is evened out, and only the tooth tip portion 8 is no longer abnormally worn as in the conventional case.
第３図と第４図とには本発明に係る歯車型研削工具の第
２実施例と第３実施例とをそれぞれ斜視により示しであ
る。3 and 4 are perspective views of a second embodiment and a third embodiment of a gear type grinding tool according to the present invention, respectively.
第２実施例は第１実施例と同様に歯先部８にＲ１１を形
成したものであるが、Ｒ１１の形状が左右で異なってい
る。これは工具１の回転方向が一定の場合などに研削を
開始する歯面側のＲ１１を小さくして研削作業の効率を
向上させたものである。The second embodiment is similar to the first embodiment in that R11 is formed on the tooth tip 8, but the shapes of R11 are different on the left and right sides. This improves the efficiency of the grinding work by reducing R11 on the tooth surface side where grinding starts when the rotational direction of the tool 1 is constant.
第３実施例は歯肉の除去をＲによらず、単純な面取り１
５により行ったもので、工具１の製作が容易となってい
る。In the third embodiment, the gingiva is removed by simple chamfering 1 without using R.
5, making it easy to manufacture the tool 1.
以上で本発明の詳細な説明を終えるが、本発明の態様は
上記実施例に限るものではなく、例えば歯肉の除去を片
側のみに行うなどの方法を採ってもよい。This concludes the detailed description of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and for example, a method may be adopted in which the gingiva is removed only from one side.
〈発明の効果〉
本発、明に係る歯車型研削工具によれば、歯先部におけ
る歯先面と歯面との交線部の歯肉を除去して歯先部の研
削負担を軽減するようにしたため、工具の寿命が大幅に
向上すると共に仕上げられる歯車の精度を高い状態に維
持できるという効果を奏する。<Effects of the Invention> According to the gear type grinding tool according to the present invention, the grinding load on the tooth tip is reduced by removing the gingiva at the intersection of the tooth tip surface and the tooth surface. As a result, the life of the tool is greatly improved, and the accuracy of the finished gear can be maintained at a high level.
第１図は本発明に係る歯車型研削工具の第１実施例を示
す部分斜視図であり、第２図はこの実施例における歯部
を示す拡大断面図である。
また、第３図と第４図とはそれぞれ本発明に係る歯車型
研削工具の第２実施例と第３実施例とを示す斜視図であ
る。そして、第５図は歯車型研削工具の使用法を示す概
念図であり、第６図は加工時における歯車型研削工具の
軌跡を示す図である。
図中、
１は歯車型研削工具、
２は被研削歯車、
５は歯部、
８は歯先部、
９は歯先面、
１０は歯面、
１１は角Ｒ１
１５は面取りである。FIG. 1 is a partial perspective view showing a first embodiment of a gear type grinding tool according to the present invention, and FIG. 2 is an enlarged sectional view showing a tooth portion in this embodiment. 3 and 4 are perspective views respectively showing a second embodiment and a third embodiment of the gear type grinding tool according to the present invention. FIG. 5 is a conceptual diagram showing how to use the gear type grinding tool, and FIG. 6 is a diagram showing the locus of the gear type grinding tool during machining. In the figure, 1 is a gear type grinding tool, 2 is a gear to be ground, 5 is a tooth portion, 8 is a tooth tip portion, 9 is a tooth tip surface, 10 is a tooth surface, 11 is a corner R1, and 15 is a chamfer.
Claims (1)
たことを特徴とする歯車型研削工具。A gear-shaped grinding tool characterized by removing the gingiva at the intersection line between the tooth tip and the tooth surface in the tooth tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25057789A JPH03117553A (en) | 1989-09-28 | 1989-09-28 | Gear type grinding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25057789A JPH03117553A (en) | 1989-09-28 | 1989-09-28 | Gear type grinding tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03117553A true JPH03117553A (en) | 1991-05-20 |
Family
ID=17209961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25057789A Pending JPH03117553A (en) | 1989-09-28 | 1989-09-28 | Gear type grinding tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03117553A (en) |
-
1989
- 1989-09-28 JP JP25057789A patent/JPH03117553A/en active Pending
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