JPS6458422A - Hob for screw rotor - Google Patents

Hob for screw rotor

Info

Publication number
JPS6458422A
JPS6458422A JP21007887A JP21007887A JPS6458422A JP S6458422 A JPS6458422 A JP S6458422A JP 21007887 A JP21007887 A JP 21007887A JP 21007887 A JP21007887 A JP 21007887A JP S6458422 A JPS6458422 A JP S6458422A
Authority
JP
Japan
Prior art keywords
hob
face
cutting
shape
clearance angle
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
Application number
JP21007887A
Other languages
Japanese (ja)
Inventor
Takaaki Sakai
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP21007887A priority Critical patent/JPS6458422A/en
Publication of JPS6458422A publication Critical patent/JPS6458422A/en
Pending legal-status Critical Current

Links

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
    • B23F21/12—Milling tools
    • B23F21/16—Hobs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Processing (AREA)

Abstract

PURPOSE:To prolong the service life by reducing the abrasion of the second face in a hob having the shape of a cutting edge having a small pressure angle by forming a clearance angle in 3-10 deg. on the second face of one or the both of the right and left cutting teeth of the several teeth on the cutting-in side of the hob. CONSTITUTION:A flank 1 is formed into a similar curve to a common hob, and is compared with the shape 12 of a rake face 7 on the sectional surface 8 having the center 10 of the hob as center, and formed into the shape 29 in which each dimension of the right and left cutting edges is reduced by a dimension 28. This means that a clearance angle is formed in the direction of the tooth trace of the hob, and even at the part where the pressure angle of the cutting edge is zero, the second face of the right and left cutting edges can be provided with a clearance angle, and several teeth on the cutting-in side to the work are formed into the above-described shape, and the abrasion of the second face of the cutting edge on the cutting-in side can be reduced. Since the tooth shape of a cut workpiece is finishing-worked by the normal teeth which are succeeded to the teeth provided with the clearance angle on the second face, the prescribed working accuracy can be obtained. The clearance angle is properly set to 3-10 deg..
JP21007887A 1987-08-26 1987-08-26 Hob for screw rotor Pending JPS6458422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21007887A JPS6458422A (en) 1987-08-26 1987-08-26 Hob for screw rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21007887A JPS6458422A (en) 1987-08-26 1987-08-26 Hob for screw rotor

Publications (1)

Publication Number Publication Date
JPS6458422A true JPS6458422A (en) 1989-03-06

Family

ID=16583452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21007887A Pending JPS6458422A (en) 1987-08-26 1987-08-26 Hob for screw rotor

Country Status (1)

Country Link
JP (1) JPS6458422A (en)

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