EP1948384A1 - Procedure for production of parts that shows cogs - Google Patents
Procedure for production of parts that shows cogsInfo
- Publication number
- EP1948384A1 EP1948384A1 EP06747966A EP06747966A EP1948384A1 EP 1948384 A1 EP1948384 A1 EP 1948384A1 EP 06747966 A EP06747966 A EP 06747966A EP 06747966 A EP06747966 A EP 06747966A EP 1948384 A1 EP1948384 A1 EP 1948384A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel plate
- procedure
- gear
- tool
- steel
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 239000011651 chromium Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 3
- 229920003023 plastic Polymers 0.000 claims abstract description 3
- 238000005755 formation reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims 3
- 238000007493 shaping process Methods 0.000 claims 2
- 238000010622 cold drawing Methods 0.000 abstract 1
- 238000005482 strain hardening Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/28—Making other particular articles wheels or the like gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/12—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting
- B23F5/14—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting the tool having the same profile as a tooth or teeth of a rack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F9/00—Making gears having teeth curved in their longitudinal direction
- B23F9/04—Making gears having teeth curved in their longitudinal direction by planing or slotting with reciprocating cutting tools
Definitions
- This invention refers to a procedure for manufacturing gears which are hard and durable, from ultra high-strength drawn or stretch bent steel blanks, in which the gear teeth are formed from a steel plate which has been made from the steel by using a press tool, where in a Stage 1 the steel plate is set up beside a tool which exhibits a profile that can shape the teeth, whereafter in a Stage 2 the press tool shapes it against the tool to produce a gear formation having peaks and interspersed valleys, whereafter in a Stage 3 the plate is drawn/stretched, leading to considerably increased strength or increased tensile yield limit in the gear teeth.
- gears by machining and forming the gears from a special steel plate, made from an ultra high-strength drawn or stretch bent steel product, consisting of a metallic blank made of iron that has been alloyed with chromium, nickel and carbon in pre-determined proportions, the metal blank being plastically cold formed in a drawing or bending operation at a pre-determined temperature in order to produce considerably increased work hardening of the steel, leading to much more durable and lighter gears.
- the components are made from a steel plate which has been made from the above-mentioned steel.
- the steel plate is set up by a press tool, which in its turn is set up beside a tool which exhibits a profile which can form the teeth in Stage 1, whereby the tool exhibits tooth formations which form raised peaks with interspersed valleys.
- the press tool is moved with movement and a direction towards the surface of the steel plate and forms/deforms it against the tool, whereupon a tooth formation
- the press tool exhibits a tapered shape, which carries out a movement in a direction along the valley between the peaks, with its pointed part pointing in a direction which gradually deforms the material, whereupon the steel plate is also gradually stretched out and assumes a mainly even thickness when the component is formed.
- the steel plate before Stage 1 takes place, can be strengthened further, whereby the plate is pre-stretched in a preparatory procedure, by deep drawing the component, so that its surface is extended. This can then be done in a dome-shaped press tool using a corresponding concave press tool of suitable size and shape, which causes the steel plate to be stretched to a dome formation during deep drawing, so that its surface is extended. It is also possible to pre- stretch the steel plate further in a second preparatory procedure, by letting the surface of the steel plate be shaped as a tube, whereupon it is stretched out from the inside with a conical press tool.
- the components are folly or partly punched from the surface of the steel plate in a predetermined shape in conjunction with one of Stages 1-3, and then comprise complete or semifinished components with or without integrated lock washers, gear tracks, helical or rounded gear teeth etc., in order to comprise all or
- the punched components can be made with spider-like legs, whereupon the components retain contact with the steel plate via these legs, so that they can easily be moved with the steel plate for further processing to form components on a pre-determined occasion, when they can easily be separated from the steel plate by tearing them off.
- the components can be supplemented by other materials such as plastics, various kinds of composite etc., to achieve the requisite wear strength in the gear teeth, together with lightness, manoeuvrability, low friction at other places in the finished product, such as in a gear wheel with gear teeth made in accordance with the procedure and with other parts made of nylon supplemented by carbon fibre etc.
- the components can be made so that the gear teeth are arranged on a gear wheel whose raised peaks point in an axial direction across the surface at the periphery of the gear wheel.
- the gear teeth can also be arranged on a gear wheel, whereupon the peaks and valleys in the surface form waves, which mainly extend radially from the centre area of the gear wheel to the peripheral area, in which case the gear wheel is made to be used as a slipping clutch etc.
- Fig 1 shows a perspective view of a steel plate, which will be formed by means of a tool, which exhibits gear teeth with peaks and valleys,
- Fig 2 shows perspective views of various components with gear teeth made in accordance with the procedure as in the invention, where detail view a) shows a gear wheel, b) shows a gear rack and c) shows a slipping clutch,
- Fig 3 shows a perspective view of a procedure involving pre-stretching the steel plate before the procedure in Stage 1,
- Fig 4 shows a perspective view of a second procedure involving pre-stretching the steel plate before the procedure in Stage 1,
- Fig 5 shows a side view of a finished product where the gear teeth form part of the product
- Fig 1 part of the procedure is shown for manufacturing components 21, which are formed from a steel plate 1 on its surface 9, which is made from the steel 14 Using a press tool 7 with a wedge shape 19, which moves in a direction 8 against the tool 6, which exhibits tooth shapes 10' and valleys 11' between the peaks 12' for forming the gear teeth 5 in accordance with figs 2 and 5
- various components 21 are shown which can comprise components of finished products 22 with gear teeth 5 having gear formations 10, with raised peaks 12 and interspersed valleys 11
- Detail figure a) shows a gear
- Detail figure b) shows a gear track 3, which can also be a gear rack 4.
- Detail figure c) shows a slipping clutch 28, where the raised peaks 12 extend radially from its centre area 27 to its peripheral area 25, which forms waves 26.
- Fig. 3 shows how deep drawing is done with a domed press tool 15, against a concave press tool 16, whereby the steel plate is stretched into a domed shape 17.
- a cutout punched in the surface 9 of the steel plate exhibits spider-like legs 24 for removal of the component 21.
- Fig. 4 shows the steel plate 1 being pre-stretched in a second preparatory procedure, by deep drawing steel plate 1, which is formed in a tubular formation 18, from the inside and outwards with a conical press tool 20, whereby the surface of the steel plate 1 is stretched out.
- Fig. 5 shows that component 21 forms at least part of a finished product 22, wherein component 21 can be supplemented by other material 23 than the steel plate 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A procedure for manufacturing components (21) which exhibit gear teeth (5) and gear wheels (2), gear tracks (3), gear racks, bevel drives etc. for creating hard, durable gear teeth (5) from an ultra high-strength deep drawn or stretch bent steel product (14), consisting of a metal blank made of iron, which has been alloyed with chromium, nickel and carbon in pre-determined proportions, the blank having been formed in a cold drawing or cold bending operation in a plastic state at a predetermined temperature in order to produce considerably increased deformation hardening in the steel, whereafter the components (21) are manufactured from steel plate (1) which has been made from the steel (14) by means of a press tool (7), whereupon in a Stage 1 the steel plate (1) is set up with a tool (6), which is intended to shape the teeth (5) in selected portions of the steel plate (1), whereafter in a Stage 2 the press tool (7) makes a movement in a direction towards the surface (9) of the steel plate and forms the surface against the tool (6), creating a gear formation (10) with peaks (12) and interspersed valleys (11), which in a Stage 3 forms drawn/stretched areas in the peaks (12) and valleys (11) in the steel plate (1), leading to considerably increased strength or increased tensile yield limit in the gear teeth (5), compared with the tensile yield limit of the metal in the blank.
Description
Procedure for production of parts that shows cogs
This invention refers to a procedure for manufacturing gears which are hard and durable, from ultra high-strength drawn or stretch bent steel blanks, in which the gear teeth are formed from a steel plate which has been made from the steel by using a press tool, where in a Stage 1 the steel plate is set up beside a tool which exhibits a profile that can shape the teeth, whereafter in a Stage 2 the press tool shapes it against the tool to produce a gear formation having peaks and interspersed valleys, whereafter in a Stage 3 the plate is drawn/stretched, leading to considerably increased strength or increased tensile yield limit in the gear teeth.
In commercially available designs of this type, traditional soft steel plate is currently used to make it easy to punch, shape and machine various components with gear teeth, such as gear wheels, gear tracks, gear racks, bevel drives etc. The gears are particularly subjected to wear and thus need to be frequently changed or re-ground and hardened to function. A certain amount of work hardening and reinforcement of the material does admittedly occur when the steel plate is worked. But in order to obtain a reasonable level of strength and hardness in the gear teeth, this soft steel must be subjected to excessively expensive and time-consuming machining and increased material thickness, which creates expensive and heavy components, which are still not good enough.
The goal of this invention is to eliminate the disadvantages found with the above-
mentioned designs, by machining and forming the gears from a special steel plate, made from an ultra high-strength drawn or stretch bent steel product, consisting of a metallic blank made of iron that has been alloyed with chromium, nickel and carbon in pre-determined proportions, the metal blank being plastically cold formed in a drawing or bending operation at a pre-determined temperature in order to produce considerably increased work hardening of the steel, leading to much more durable and lighter gears.
Thanks to this invention, it is now possible to manufacture components which exhibit gear teeth, such as gear wheels, gear tracks, gear racks, bevel drives etc., to create hard, durable gears made from an ultra high-strength drawn or stretch bent steel product, consisting of an iron blank that has been alloyed with chromium, nickel and carbon in pre-determined proportions, as mentioned in publications such as WO 03/076100, the metal blank being plastically formed in a drawing or bending operation at a pre-determined temperature in order to produce considerably increased work hardening of the steel. According to the invention, the components are made from a steel plate which has been made from the above-mentioned steel. The steel plate is set up by a press tool, which in its turn is set up beside a tool which exhibits a profile which can form the teeth in Stage 1, whereby the tool exhibits tooth formations which form raised peaks with interspersed valleys. In a Stage 2, the press tool is moved with movement and a direction towards the surface of the steel plate and forms/deforms it against the tool, whereupon a tooth formation
consisting of peaks and with interspersed valleys is formed. Then in Stage 3, drawn/stretched areas are formed in the steel plate, primarily between the peaks and valleys. This creates considerably increased strength and increased tensile yield limit in the gear teeth, compared with the tensile yield limit of the metal blank that was used. In a preferred configuration of the invention, the press tool exhibits a tapered shape, which carries out a movement in a direction along the valley between the peaks, with its pointed part pointing in a direction which gradually deforms the material, whereupon the steel plate is also gradually stretched out and assumes a mainly even thickness when the component is formed. In the preferred configuration of the invention, before Stage 1 takes place, the steel plate can be strengthened further, whereby the plate is pre-stretched in a preparatory procedure, by deep drawing the component, so that its surface is extended. This can then be done in a dome-shaped press tool using a corresponding concave press tool of suitable size and shape, which causes the steel plate to be stretched to a dome formation during deep drawing, so that its surface is extended. It is also possible to pre- stretch the steel plate further in a second preparatory procedure, by letting the surface of the steel plate be shaped as a tube, whereupon it is stretched out from the inside with a conical press tool. The components are folly or partly punched from the surface of the steel plate in a predetermined shape in conjunction with one of Stages 1-3, and then comprise complete or semifinished components with or without integrated lock washers, gear tracks, helical or rounded gear teeth etc., in order to comprise all or
part of a bevel drive etc. The invention claims that the punched components can be made with spider-like legs, whereupon the components retain contact with the steel plate via these legs, so that they can easily be moved with the steel plate for further processing to form components on a pre-determined occasion, when they can easily be separated from the steel plate by tearing them off. When a completed product is assembled, the components can be supplemented by other materials such as plastics, various kinds of composite etc., to achieve the requisite wear strength in the gear teeth, together with lightness, manoeuvrability, low friction at other places in the finished product, such as in a gear wheel with gear teeth made in accordance with the procedure and with other parts made of nylon supplemented by carbon fibre etc. The components can be made so that the gear teeth are arranged on a gear wheel whose raised peaks point in an axial direction across the surface at the periphery of the gear wheel. The gear teeth can also be arranged on a gear wheel, whereupon the peaks and valleys in the surface form waves, which mainly extend radially from the centre area of the gear wheel to the peripheral area, in which case the gear wheel is made to be used as a slipping clutch etc. The greatest advantage of the invention thus is that by using the procedure it becomes possible to create a cheap, simple process which, thanks to the procedure gives durable gear teeth with high tensile strength, hardness and low weight which can resist wear for a long time.
The invention is described in greater detail below, with the aid of a number of preferred construction examples, on which
Fig 1 shows a perspective view of a steel plate, which will be formed by means of a tool, which exhibits gear teeth with peaks and valleys,
Fig 2 shows perspective views of various components with gear teeth made in accordance with the procedure as in the invention, where detail view a) shows a gear wheel, b) shows a gear rack and c) shows a slipping clutch,
Fig 3 shows a perspective view of a procedure involving pre-stretching the steel plate before the procedure in Stage 1,
Fig 4 shows a perspective view of a second procedure involving pre-stretching the steel plate before the procedure in Stage 1,
Fig 5 shows a side view of a finished product where the gear teeth form part of the product
As is seen in Fig 1, part of the procedure is shown for manufacturing components 21, which are formed from a steel plate 1 on its surface 9, which is made from the steel 14 Using a press tool 7 with a wedge shape 19, which moves in a direction 8 against the tool 6, which exhibits tooth shapes 10' and valleys 11' between the peaks 12' for forming the gear teeth 5 in accordance with figs 2 and 5
As in fig 2 and fig 5, various components 21 are shown which can comprise components of finished products 22 with gear teeth 5 having gear formations 10, with raised peaks 12 and interspersed valleys 11 Detail figure a) shows a gear
wheel 2 with gear teeth 5 arranged in the peripheral area 25 of the gear wheel 5. Detail figure b) shows a gear track 3, which can also be a gear rack 4. Detail figure c) shows a slipping clutch 28, where the raised peaks 12 extend radially from its centre area 27 to its peripheral area 25, which forms waves 26.
Fig. 3, shows how deep drawing is done with a domed press tool 15, against a concave press tool 16, whereby the steel plate is stretched into a domed shape 17. A cutout punched in the surface 9 of the steel plate exhibits spider-like legs 24 for removal of the component 21.
Fig. 4 shows the steel plate 1 being pre-stretched in a second preparatory procedure, by deep drawing steel plate 1, which is formed in a tubular formation 18, from the inside and outwards with a conical press tool 20, whereby the surface of the steel plate 1 is stretched out.
Fig. 5 shows that component 21 forms at least part of a finished product 22, wherein component 21 can be supplemented by other material 23 than the steel plate 1.
Claims
1. A procedure for manufacturing components (21) which exhibit gear teeth (5) such as gear wheels (2), gear tracks (3), gear racks (4), bevel drives etc. for creating hard, durable gears (5) from an ultra high-strength deep drawn or stretch-bent steel product (14), consisting of a metal blank made of iron that has been alloyed with chromium, nickel and carbon in predetermined proportions, the metal blank being plastically cold-worked during a deep drawing or bending operation at a pre-determined temperature in order to achieve strongly enhanced deformation hardening of the steel, ch ara ct eri s e d b y the components (21) being formed to some extent from a steel plate (1), which is made from the steel (14) with the aid of at least one press tool (7), whereby in a Stage 1 the steel plate (1) is set up by at least one tool (6) which exhibits a shape which in at least one area shall shape gear teeth (5) on selected areas of the steel plate (1), whereby in a Stage 2 the press tool (7) with at least one movement in a direction towards the surface (9) of the steel plate draws/stretches the plate against the tool (6), whereupon at least one gear tooth with at least two raised peaks (12) and at least one interspersed valley (11) is formed or is being formed, whereupon in a Stage 3 the drawing/stretching of the steel plate (1) is established, primarily between the peaks (12) and valleys (11), whereupon a considerably raised level of strength
and/or raised tensile yield limit is obtained in at least one place in the gear teeth (5), compared with the tensile yield limit of the metal blank used.
2. A procedure as in patent demand 1, characterised by the tool (6) / press tool (7) exhibiting gear tooth formations (10') with at least two raised peaks (12') and at least one interspersed valley (IF) for working the steel plate (1).
3. A procedure as in patent demands 1 and 2, characterised by the press tool (7) in Stage 2 exhibiting at least one wedge-shaped formation (19) in some part, whereby the movement goes in the direction (8) along the valley (H') between the raised peaks (12% where the wedge formation (19) with its pointed section facing in direction (8), whereupon the wedge (19) gradually deforms the material, whereupon the steel plate (1) is also gradually stretched out and assumes a mainly even thickness when the component (21) is formed.
4. A procedure as in patent demand ^characterised by the steel plate (1) being pre- stretched extra in a preparatory procedure by deep drawing at of least one steel plate (1) before Stage 1, whereby the surface (9) of the steel plate is extended.
5. A procedure as in patent demand 4, characterised by the deep drawing being done with at least one domed shaping tool (15), primarily with the aid of a corresponding concave shaping tool (16) of suitable size, whereby the steel
plate (1) is stretched out to a domed shape (17) during deep drawing, whereby the surface (9) of the steel plate (1) is extended.
6. A procedure as in patent demand 4, characterised by the steel plate (1) being pre- stretched extra in a second, preparatory procedure, by deep drawing a steel plate (1) which is formed in to a tubular shape (18), using a conical press tool (20), whereby the surface (9) of the steel plate (1) is extended.
7. A procedure as in patent demands 1, 3, 4, 5 and 6, characterised by the components (21) being partly or fully punched out of the surface (9) of the steel plate (1) during one of the stages 1-3, in a pre-determined shape in order to subsequently comprise all or part of the component (21).
8. A procedure as in patent demand 7, characterised by the punched cutout in the surface (9) of the steel plate (1) exhibiting at least one spider-shaped leg (24), whereby the components (21) hold together with the steel plate (1), so that they can easily be moved with the steel plate (1), for further processing into components (21) on at least one predetermined occasion, whereafter they can easily be freed from the steel plate (1) by being snapped off.
9. A procedure as in one of the patent demands above, characterised by the component (21) comprising at least part of a finished product (22), in which the
components (21) can be supplemented by other materials (23) such as plastics, various types of composite etc., to provide the intended durability of the gear teeth (5) and also to provide increased lightness, manoeuvrability, low friction in other sections of the finished product (22).
10. A procedure as in at least one or several of the patent demands above, ch ara c t eri s e d by the teeth (5) being arranged on a gear wheel (2) and whose raised peaks (12) point in an axial direction across the surface (9) at the periphery (25) of the gear wheel.
11. A procedure as in at least one or several of the patent demands above, ch ar act e ri s e d b y one of the teeth (5) being arranged on a gear wheel (2), so that its raised peaks (12) and valleys (11) on the surface (9) form waves (26) which extend radially, mainly from the centre area (27) of the gear wheel (2) to the peripheral area (25), such that the gear wheel (2) is shaped to be used as a slipping clutch (28) etc.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0501596A SE527643C2 (en) | 2005-07-08 | 2005-07-08 | Toothed component production method for e.g. gears, comprises pressing steel sheet against toothed tool and then stretching |
| PCT/SE2006/000786 WO2007008136A1 (en) | 2005-07-08 | 2006-06-28 | Procedure for production of parts that shows cogs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1948384A1 true EP1948384A1 (en) | 2008-07-30 |
| EP1948384A4 EP1948384A4 (en) | 2011-12-28 |
Family
ID=36251000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06747966A Withdrawn EP1948384A4 (en) | 2005-07-08 | 2006-06-28 | Procedure for production of parts that shows cogs |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1948384A4 (en) |
| SE (1) | SE527643C2 (en) |
| WO (1) | WO2007008136A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013153A (en) * | 1974-09-06 | 1977-03-22 | Toyota Jidosha Kogyo Kabushiki Kaisha | Clutch hub for transmission |
| WO2003076100A1 (en) * | 2002-03-13 | 2003-09-18 | Avestapolarit Ab | A method for manufacturing an ultra-high-tensile, stretch formed or stretch bent sheet metal product of steel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB736494A (en) * | 1951-11-22 | 1955-09-07 | David Dalin | Improvements in machines for flame cutting gears, sprockets and like toothed members |
| GB1150059A (en) * | 1966-08-01 | 1969-04-30 | Edward Hanna | Method and apparatus for forming toothed parts |
| US4750848A (en) * | 1986-08-14 | 1988-06-14 | Harold Adler | Involute gear cutter |
| US5878493A (en) * | 1996-08-28 | 1999-03-09 | Tesma International Inc. | Method of forming toothed wheels |
-
2005
- 2005-07-08 SE SE0501596A patent/SE527643C2/en not_active IP Right Cessation
-
2006
- 2006-06-28 WO PCT/SE2006/000786 patent/WO2007008136A1/en active Application Filing
- 2006-06-28 EP EP06747966A patent/EP1948384A4/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013153A (en) * | 1974-09-06 | 1977-03-22 | Toyota Jidosha Kogyo Kabushiki Kaisha | Clutch hub for transmission |
| WO2003076100A1 (en) * | 2002-03-13 | 2003-09-18 | Avestapolarit Ab | A method for manufacturing an ultra-high-tensile, stretch formed or stretch bent sheet metal product of steel |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2007008136A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007008136A1 (en) | 2007-01-18 |
| SE0501596L (en) | 2006-05-02 |
| EP1948384A4 (en) | 2011-12-28 |
| SE527643C2 (en) | 2006-05-02 |
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Legal Events
| Date | Code | Title | Description |
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