Broaching cutter
US-2016250702-A1 · Sep 1, 2016 · US
Helical broach
US9902004B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9902004-B2 |
| Application number | US-201414651395-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 20, 2014 |
| Priority date | Feb 14, 2013 |
| Publication date | Feb 27, 2018 |
| Grant date | Feb 27, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The finishing part ( 4 ) of this helical broach ( 1 ) is formed by a first shell ( 20 ) and a second shell ( 30 ) which are divided in the axial direction, and is obtained by forming a first finishing blade ( 50 ), which comprises a prescribed gear tooth helix angle (α) end a first blade groove helix angle (β 1 ), on the aforementioned first shell ( 20 ) and forming a second finishing blade ( 60 ), which comprises the aforementioned prescribed gear tooth helix angle (α) and a second blade groove helix angle (β 2 ) which differs from the aforementioned first blade groove helix angle (β 1 ), on the aforementioned second shell ( 30 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. A helical broach comprising: a cylindrical shell in which finishing blades having a predetermined gear tooth helix angle are formed on an outer peripheral side, wherein the shell includes a first shell and a second shell which are divided in an axial direction, in the first shell, a first finishing blade having the gear tooth helix angle and a first blade groove helix angle is formed, and in the second shell, a second finishing blade having the gear tooth helix angle and a second blade groove helix angle which is different from the first blade groove helix angle is formed; wherein the diameters of the first and second finishing blades in said first and second shells are substantially constant in the axial direction. 2. The helical broach according to claim 1 , wherein the first finishing blade cuts one tooth surface along a tooth lead in a piece to be cut, and the second finishing blade cuts the other tooth surface along the tooth lead in the piece to be cut. 3. The helical broach according to claim 1 , wherein both of a tool angle of the first finishing blade and a tool angle of the second finishing blade are an acute angle. 4. The helical broach according to claim 2 , wherein both of a tool angle of the first finishing blade and a tool angle of the second finishing blade are an acute angle.
Assignees
Inventors
Classifications
having inserted cutting edges · CPC title
- B23F21/26Primary
Broaching tools · CPC title
for cutting helical grooves · CPC title
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Frequently asked questions
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- What does patent US9902004B2 cover?
- The finishing part ( 4 ) of this helical broach ( 1 ) is formed by a first shell ( 20 ) and a second shell ( 30 ) which are divided in the axial direction, and is obtained by forming a first finishing blade ( 50 ), which comprises a prescribed gear tooth helix angle (α) end a first blade groove helix angle (β 1 ), on the aforementioned first shell ( 20 ) and forming a second finishing blade ( 6…
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Machine Tool Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B23F21/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 27 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).