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)

Applications Claiming Priority (2)

Publications (2)

Family

ID=36251000

Family Applications (1)

Country Status (3)

Citations (2)

Family Cites Families (4)

• 2005
  • 2005-07-08 SE SE0501596A patent/SE527643C2/sv 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/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events