# US 9,751,141 B2 · Method, tool and device for profiling a finishing tool

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- Number: US 9,751,141 B2
- Document ID: US9751141B2
- Status: Granted
- Kind: B2
- Application number: 14/905,947
- Filed: 2014-07-18
- Published: 2016-06-09
- Granted: 2017-09-05
- Earliest claimed: 2013-07-19
- Assignees: Samp S.P.A. Con Unico Socio
- Applicants: SAMP S.p.A. CON UNICO SOCIO
- Inventors: Enrico Landi
- Web page: https://patentgrep.com/patent/US9751141B2

## CPC

- B23F 23/1225: {Arrangements of abrasive wheel dressing devices on gear-cutting machines (dressing devices per se B24B53/00)}
- B24B 53/075: for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms (B24B53/07 takes precedence)
- B23F: MAKING GEARS OR TOOTHED RACKS (by stamping B21D; by rolling B21H; by forging or pressing B21K; by casting B22; arrangements for copying or controlling B23Q; machines or devices for grinding or polishing, in general B24B)
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

## Abstract

Method for profiling a finishing tool, in particular a grinding worm, having a first and a second finishing flank; the method providing the steps of: arranging a cutting portion of a profiling tool in contact with the first flank of the thread; causing the cutting portion to slide in contact with the first flank of the thread so as to profile it; removing the cutting portion from the thread; automatically rotating the profiling tool so as to arrange the cutting portion in contact with a second flank of the thread; and causing the cutting portion to slide in contact with the second flank of the thread so as to profile it.

## Claims

### Claim 1

A method for profiling a finishing tool (2), in particular a grinding worm, having a first and a second flank (4, 5); the method comprising the steps of:
arranging a cutting portion (30; 31; 130A; 131A) of a profiling tool (9; 109) in contact with the first flank (4);
causing the cutting portion (30; 31; 130A, 131A) to slide in contact with the first flank (4) so as to profile it;
removing the cutting portion (30; 31; 130A, 131A) from the first flank (4);
automatically rotating the profiling tool (9; 109) so as to arrange the cutting portion (30; 31; 130A, 131A) in contact with the second flank (5);
causing the cutting portion (30; 31; 130A, 131A) to slide in contact with the second flank (5) so as to profile it; and,
wherein the profiling tool (9; 109) is a disc rotatable around a first axis (L); wherein the step of automatically rotating the profiling tool (9; 109) provides for the rotation of the profiling tool (9; 109) by at least 180° around a second axis (N) transverse to the first axis (L).

### Claim 2 (depends on 1)

Method, according to claim 1, wherein the finishing tool (2) is a grinding worm comprising a thread (3) with a first and a second flank (4, 5) to be profiled; wherein the profiling tool (9; 109) has a first cutting portion (30; 130A), which is suited to perform a first profiling operation and a second cutting portion (31; 131A), which is suited to perform a second profiling operation; the method comprising the steps of:
arranging the first cutting portion (30; 130A) in contact with the first flank (4) of the thread (3);
causing the first cutting portion (30; 130A) to slide in contact with the first flank (4) of the thread (3) so as to perform the first profiling operation;
removing the first cutting portion (30; 130A) from the first flank (4) of the thread (3);
automatically rotating the profiling tool (9; 109) so as to arrange the first cutting portion (30; 130A) in contact with the second flank (5) of the thread (3);
causing the first cutting portion (30; 130A) of the profiling tool (9; 109) to slide in contact with the second flank (5) of the thread (3) so as to perform the first profiling operation;
arranging the second cutting portion (31; 131A) of the profiling disc in contact with the first flank (4) of the thread (3);
causing the second cutting portion (31; 131A) to slide in contact with the first flank (4) of the thread (3) to perform the second profiling operation;
removing the second cutting portion (31; 131A) from the second flank (5) of the thread (3);
automatically rotating the profiling tool (9; 109) so as to arrange the second cutting portion (31; 131A) in contact with the second flank (5) of the thread (3); and,
causing the second cutting portion (31; 131A) of the profiling tool (9; 109) to slide in contact with the second flank (5) of the thread (3) to perform the second profiling operation.

### Claim 3 (depends on 2)

Method, according to claim 2, wherein the first profiling operation is a roughing-out operation and the second profiling operation is a finishing operation.

### Claim 4 (depends on 2)

Method, according to claim 2, wherein the first profiling operation is with linear contact and the second profiling operation is with localized contact i.e. a contact with a small and circumscribed area.

### Claim 5 (depends on 1)

Method, according to claim 1, wherein the angular position of the profiling tool (9; 109) with respect to a second axis that is transverse to the first axis (L), is fixed during each step in which a cutting portion (30; 31; 130A, 131A) is caused to slide into contact with a flank (4; 5) of the thread (3).

### Claim 6 (depends on 1)

A profiling tool (9; 109) for performing the method of claim 1 having the shape of a disc; wherein the profiling tool (9; 109) has a first rotation axis (L), a first cutting portion (30; 130A) and a second cutting portion (31; 131A) which are suited to profile the finishing tool (2); in an axial section, the first and the second cutting portion (30, 31; 130A, 131A) are divided from one another by a second axis (M) that is perpendicular to the rotation axis (L) of the profiling tool (9; 109); the profiling tool (9; 109) having a rotation center (R) defined by the intersection of said first and second axis (L, M); wherein the first cutting portion (30; 130A) and the second cutting portion (31; 131A) have cutting properties different from one another.

### Claim 7 (depends on 6)

Tool, according to claim 6, wherein the first cutting portion (30; 130A) and the second cutting portion (31; 131A) are asymmetric with respect to the second axis (M).

### Claim 8 (depends on 6)

Tool, according to claim 6, wherein the first cutting portion (30) and the second cutting portion (31) are made of abrasive material; the first cutting portion (30) is suited to perform roughing-out operations; the second cutting portion is suited to perform finishing operations (31).

### Claim 9 (depends on 6)

Tool, according to claim 6, wherein the first cutting portion (130A) and the second cutting portion (131A) have different extensions from one another; wherein the extension of the first cutting portion (130A) is greater than the extension of the second cutting portion (131A) so that the first cutting portion (30) is suited to perform profiling operations with linear contact while the second cutting portion (131A) is suited to perform profiling operations with localized contact i.e. contact with a small and circumscribed area.

### Claim 10 (depends on 1)

A device for profiling a finishing tool (2), in particular a grinding worm, according to the method of claim 1 by means of a profiling tool (9; 109), which is a disc and has a first rotation axis (L) and a second axis (B) transverse to said first axis (L); wherein the profiling device (1) comprises a support (10), which is mounted rotatable around a third axis (B), and a tool carrier spindle (8), which is installed on the support (10) and is mounted rotatable around a fourth axis (C); wherein, in use, the profiling tool (9; 109) is fitted around said spindle (8) so that said first axis (L) coincides with said fourth axis (C) and said second axis (N) coincides with said third axis (B); wherein the third axis (B) and the fourth axis (C) are transverse, in particular perpendicular, to one another; and, wherein the support (10) performs a rotation greater than 180° around the third axis (B).

### Claim 11 (depends on 10)

Device, according to claim 10, wherein the profiling tool (9; 109) has a rotation center (R); the support (10) and the spindle (8) being suited to keep the rotation center (R) of the profiling tool (9; 109) on the third axis (B), whatever the angular position of the support (10) itself around said third axis (B).

### Claim 12 (depends on 10)

Device, according to claim 10, wherein the spindle (8) has a housing (H) for said profiling tool (9; 109), wherein the position and the extension of said housing (H) are a function of the structural dimension of the support (10) and of the position of said third axis (B).