GB471267A - Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers - Google Patents

Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers

Info

Publication number
GB471267A
GB471267A GB1000636A GB1000636A GB471267A GB 471267 A GB471267 A GB 471267A GB 1000636 A GB1000636 A GB 1000636A GB 1000636 A GB1000636 A GB 1000636A GB 471267 A GB471267 A GB 471267A
Authority
GB
United Kingdom
Prior art keywords
carrier
chasers
shaft
tool
teeth
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
GB1000636A
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.)
Alfred Herbert Ltd
Original Assignee
Alfred Herbert 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 Alfred Herbert Ltd filed Critical Alfred Herbert Ltd
Priority to GB1000636A priority Critical patent/GB471267A/en
Publication of GB471267A publication Critical patent/GB471267A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/60—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups
    • B24B3/602—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups of thread cutting tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Rotary Pumps (AREA)

Abstract

471,267. Forming chaser &c. teeth. HERBERT, Ltd., A., LLOYD, A. H., and BOOTH, H. April 4, 1936, No. 10006. [Class 60] [Also in Group XXII] The teeth of screw-cutting dies or chasers are formed or trued by a tool 25, which may be a grinding-wheel with a single annular ridge, or more than one ridge on its periphery, or may be a turning-tool, the chasers 8 being held by clamps 11 in slots 13 equally spaced in a carrier 9 with their outer surfaces equidistant from the axis of the carrier. The carrier is slidable on a non-rotating shaft 15 having a flange 16 at one end carrying a lug 17 engaging a V-guide 18 and the shaft is fed axially, to advance the chasers one tooth for each complete revolution thereof, by means usual in lathes &c. Rotatable but not movable axially on the other end of the shaft is a sleeve 19 having a driving notch 27 and a driving and sliding connection 20 with the carrier 9, a spring 21 pressing one end of the carrier. On the shaft 15 is cam means 22 having a single axially projecting incline 23 to be engaged by four equally spaced balls 24 mounted in the carrier and engaging the incline 23 as the chasers come into engagement with the tool 25, so that the chasers are given additional axial feed necessary for cutting the tooth at the correct helical angle. The tool 25 may be fed radially to obtain the required depth of cut, and may be trued before the final cuts are made. The tool is moved towards and from the carrier 9 by an eccentric rotating at four times the speed of the carrier 9, and by appropriately shaping the eccentric, the chaser teeth may be given straight edges as at 34, Fig. 6. For chasers having left-hand threads, the flange 16 guided by the part 18 is separate from the shaft 15, which is rotatable and is driven, the carrier 9 being rotated by the shaft and moved as described above by the cam means, whilst all of the parts also are fed as described above.
GB1000636A 1936-04-04 1936-04-04 Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers Expired GB471267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1000636A GB471267A (en) 1936-04-04 1936-04-04 Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1000636A GB471267A (en) 1936-04-04 1936-04-04 Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers

Publications (1)

Publication Number Publication Date
GB471267A true GB471267A (en) 1937-09-01

Family

ID=9959650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1000636A Expired GB471267A (en) 1936-04-04 1936-04-04 Improvements in the formation or trueing of the teeth of screw-cutting dies or chasers

Country Status (1)

Country Link
GB (1) GB471267A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434753A (en) * 1945-07-11 1948-01-20 Rudolf W Andreasson Relieving the teeth of circular cutting elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434753A (en) * 1945-07-11 1948-01-20 Rudolf W Andreasson Relieving the teeth of circular cutting elements

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