GB829130A - Method of making a gear finishing tool - Google Patents

Method of making a gear finishing tool

Info

Publication number
GB829130A
GB829130A GB7417/57A GB741757A GB829130A GB 829130 A GB829130 A GB 829130A GB 7417/57 A GB7417/57 A GB 7417/57A GB 741757 A GB741757 A GB 741757A GB 829130 A GB829130 A GB 829130A
Authority
GB
United Kingdom
Prior art keywords
teeth
plastic
gear
tool
model
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.)
Expired
Application number
GB7417/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nachi Machining Technology Co
Original Assignee
National Broach and Machine Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Broach and Machine Co filed Critical National Broach and Machine Co
Publication of GB829130A publication Critical patent/GB829130A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D15/00—Producing gear wheels or similar articles with grooves or projections, e.g. control knobs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

A gear finishing tool is made by forming a mould from a representation of a master gear, and moulding the tool in the mould thus formed. A plastic model of a gear is formed, together with a model of a conjugate gear of a hard resilient plastic with abrasive particles embedded in the teeth, the models rolled in mesh to remove material from the plastic model as a result of the action of the abrasive particles, and a mould formed from the plastic model, in which is moulded a tool having teeth at least the surface portions of which are hard resilient plastic material in which abrasive particles are embedded. The models are rolled in mesh preferably by driving one of them first in one direction and then in the other and opposing rotation of the driven member, e.g. by brake action. The invention is particularly useful in the finishing of bevel, spiral bevel, or hypoid gears having crowned teeth. In such a case initial contact between the teeth of the plastic gear and the plastic abrasive tool is limited to a zone central of the teeth but as the two are rotated in mesh the teeth of the plastic gear become longitudinally concave and capable of contacting the teeth of the abrasive tool from end to end. The final gear finishing tool is a counterpart of this modified plastic model gear and accordingly its teeth are longitudinally concave by an amount sufficient to cause them to engage substantially uniformly from end to end with the crowned teeth of a metal pinion and to finish the teeth of this pinion from end to end. The tool may be formed in its entirety of the hard resilient plastic material or may have a disc-shaped metal core and plastic teeth. The metal disc may have short teeth which extend partly into the plastic teeth. Suitable plastic materials are epoxy casting resins in which 60 grit abrasive such as silicon carbide is incorporated. The moulds may also be made of epoxy resins but it is preferable to use a material of higher heat resistance, e.g. phenolic resins such as phenol formaldehyde and phenol-furfural compounds or polychlorotrifluoroethylene, so that the epoxy resin may be heated during moulding. Specification 800,680 is referred to.
GB7417/57A 1956-04-30 1957-03-06 Method of making a gear finishing tool Expired GB829130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US829130XA 1956-04-30 1956-04-30

Publications (1)

Publication Number Publication Date
GB829130A true GB829130A (en) 1960-02-24

Family

ID=22174259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7417/57A Expired GB829130A (en) 1956-04-30 1957-03-06 Method of making a gear finishing tool

Country Status (1)

Country Link
GB (1) GB829130A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2784045A1 (en) * 1998-10-01 2000-04-07 Monti Werkzeuge Gmbh ROTARY TOOL FOR MACHINING SURFACES
CN112045258A (en) * 2019-06-06 2020-12-08 卡帕耐尔斯有限两合公司 Method for producing a workpiece having a tooth profile or a contour

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2784045A1 (en) * 1998-10-01 2000-04-07 Monti Werkzeuge Gmbh ROTARY TOOL FOR MACHINING SURFACES
CN112045258A (en) * 2019-06-06 2020-12-08 卡帕耐尔斯有限两合公司 Method for producing a workpiece having a tooth profile or a contour

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