IPC 7 English version B23G !A-B23G 11/00

B23G-B23G01100

SECTION B – PERFORMING OPERATIONS; TRANSPORTING

B 23

MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR (punching, perforating, making articles by processing sheet metal, tubes, or profiles B21D; wire-working B21F; making pins, needles, or nails B21G; making chains B21L; grinding B24)

B 23 G

THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (thread- forming by corrugating tubes B21D 15/04, by rolling B21H 3/02, by forging, pressing, or hammering B21K 1/56; making helical grooves by turning B23B 5/48, by milling B23C 3/32, by grinding B24B 19/02; arrangements for copying or controlling B23Q)

Note

In this subclass, the following expression is used with the meaning indicated:

–

"thread cutting" includes the use of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material.

Subclass Index

THREAD-CUTTING METHODS, MACHINES OR DEVICES THEREFOR

B23G 1/00, B23G 3/00, B23G 7/00, B23G 9/00

FINISHING

B23G 9/00

TOOLS

B23G 5/00, B23G 7/02

ACCESSORIES

B23G 11/00

Thread cutting; Automatic machines specially designed therefor

on an external or internal cylindrical or conical surface, e.g. on recesses (B23G 1/16, B23G 1/22, B23G 1/32, B23G 1/36 take precedence)

Machines with one working-spindle

specially adapted for making conical screws, e.g. wood-screws

Machines with a plurality of working-spindles

specially adapted for making conical screws, e.g. wood-screws

Machines with a toothed cutter in the shape of a spur gear or the like which is rotated to generate the thread profile as the work rotates

specially adapted for making conical screws, e.g. wood-screws

in holes of workpieces by taps (B23G 1/26, B23G 1/32, B23G 1/36 take precedence)

Machines with one working-spindle

Machines with a plurality of working-spindles

Machines specially designed for operating on pipes or tubes

portable

Manually-operated thread-cutting devices (features of the threading tool B23G 5/00)

with means for adjusting the threading tool

without means for adjusting the threading tool, e.g. with die-stocks (tap wrenches B25B)

by milling

with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpiece

by grinding

with grinding discs guided along the workpiece in accordance with the pitch of the required thread

with grinding discs guided radially to the workpiece

Centreless grinding

Equipment or accessories specially designed for machines or devices for thread cutting

for holding the threading tools

for guiding the threading tools

for cutting thread by successive operations

for operating on pipes or tubes

Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working-spindle

for withdrawing or resetting the threading tool

for repeatedly setting the threading tool in a predetermined working position

for compensating inaccuracies in the pitch of the lead-screw

for advancing or controlling the threading tool or the work by templates, cams, or the like

for cutting thread of variable pitch

for using several adjacently-arranged threading tools, e.g. using several chasers

for cutting thread of conical shape

Thread-cutting tools; Die-heads

without means for adjustment

Dies

Taps (chucks therefor B23B 31/00)

with means for adjustment

Die-heads

self-releasing

Tapping-heads

self-releasing

Milling cutters

combined with other tools, e.g. drills

Forming thread by means of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material (features of machines or devices not specially adapted to the particular mode of forming the thread B23G 1/00)

Tools for this purpose

Working screws, bolt heads or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw thread (making washers or nuts by processing metal sheets, tubes or profiles without essentially removing material B21D 53/20, B21D 53/24)

11/

Feeding or discharging mechanisms combined with, or arranged in, or specially adapted for use in connection with, thread-cutting machines (for machine tools in general B23Q)