GB2253580A - Metal cutting tooling system - Google Patents
Metal cutting tooling system Download PDFInfo
- Publication number
- GB2253580A GB2253580A GB9204822A GB9204822A GB2253580A GB 2253580 A GB2253580 A GB 2253580A GB 9204822 A GB9204822 A GB 9204822A GB 9204822 A GB9204822 A GB 9204822A GB 2253580 A GB2253580 A GB 2253580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin
- tool
- centre piece
- frusto
- holder
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
- B23B31/1078—Retention by wedges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
- B23B31/1075—Retention by screws
- B23B31/1077—Retention by screws acting on a floating pin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
A load transmitting pin (5) comprises a centre piece (8) having a longitudinal axis (9) and a pair of mutually diverging outer faces (10) terminating at an annular abutment surface (11) to engage a portion (12) of a tool; a first outer part (13) having at an outer end (14) a frusto-conical recess (15) and at an inner end (16) a force transmission face (17) adapted to seat on one diverging outer face (10) of the centre piece (8); a second outer part (18) having at an outer end (19) a frusto-conical nose (20) and at an inner end (21) a force transmission face (22) adapted to seat on the other diverging outer face (10) of the centre piece (8); the centre piece (8) having a greater axial length (23) than the corresponding dimension (24) of the first and second outer parts (13, 18); and means (25, 26) to secure the first and second outer parts (13, 18) to the centre piece (8) to define a unitary pin (5). <IMAGE>
Description
METAL CUTTING TOOLING SYSTEM
This invention relates to a metal cutting tooling system and to components thereof.
Conventionally, tooling systems consist of a tool holder having at one end an industry-standard profile adapted to be clamped on an industry standard spindle of a machine tool, and at the other end a socket to receive a shank provided by, or at, one end of a tool such as a reamer, with means to secure the tool to its holder. In circumstances where with highly accurate machining is required e.g. during reaming operations, a very close tool-to-holder fit is required, yet to avoid tool changing being unacceptably difficult a degree of play is deliberabely introduced, which detracts from machining accuracy.To take up such play various proprietary tightening systems have been proposed operable on the principle of converting radial loading forces provided by tightening radial screws into axial forces by various means, to urge a conventionally provided, radial abutment shoulder of the tool into tight seating engagement with a radial annular face of the holder.
The object of the present invention is to provide an improved metal cutting tooling system and components thereof.
According to a first aspect of the present invention, there is provided a load transmitting pin comprising:
(i) a centre piece, having a longitudinal axis and a
pair of mutually diverging outer faces
terminating at an annular abutment surface
adapted, in use, to engage a portion of a tool;
(ii) a first outer part having at an outer end a
frusto-conical nose or recess and at an inner
end a force transmission face adapted to seat on
one diverging outer face of the centre piece;
(iii) a second outer part having at an outer end a
frusto-conical recess or nose and at an inner
end a force transmission face adapted to seat on
the other diverging outer face of the centre
piece;
(iv) the centre piece having a greater axial length
than the corresponding dimension of the first
and second outer parts; and
(v) means to secure the first and second outer parts
to the centre piece to define a unitary pin.
Preferably, the outer faces of the centre piece
o diverge at 12 and consequently the force transmission faces 0 of the first and second outer parts are also at 12
Conveniently, the securing means comprises at least one elongate connector such as a wire etc. connected e.g. if a single pin is involved, by brazing, at opposite ends to the first and second outer parts, or a spring with screws and passing, with play, through an oversize bore provided in the centre piece; or if two connectors are involved, by a first connector between the first outer part and the centre piece, and a second connector between the second outer part and the centre piece. Preferably, the centre piece is provided with a through hole for the flow of coolant, in which case the securing means extends orthogonally of the coolant hole.
The centre piece is preferably of circular section, and also may be provided with a flat or a neck intermediate its ends.
According to a second aspect of the invention there is provided a rotary tool such as a reamer, having an axis of rotation, a coaxial shank of circular section in which there is a diametral bore in which is housed a load transmitting pin in accordance with the first aspect, the axial length of the centre piece approximating to the bore diameter, and the corresponding dimensions of the first and second outer parts being less than the bore diameter.
The shank is preferably provided with a radial, tapped hole so that a screw passed along the hole engages the flat or neck, to orientate correctly the centre piece and to prevent inadvertent loss of the pin from the tool during tool fitting or tool changing operations. By correct orientation is meant that the abutment surface is distal from the tool. Also, the overall dimension of the centre piece and the two outer parts of the pin is less than the length of the diametral bore, in the assembled condition of the pin i.e. when the two outer parts are secured to the centre piece by the securing means.
According to a third aspect of the invention there is provided tooling system comprising a tool holder having an axis of rotation, a co-axial socket provided in the tool holder, the shank of a tool in accordance with the second aspect fitted into the socket, the tool and holder having coincident axes of rotation, and the holder provided with two tapped holes intersecting the socket and being on a common, diametral axis co-incident, or generally so, with the axis of the diametral bore of the tool, a plug screwed into each tapped hole, one plug having a frusto-conical nose or recess adapted to engage the frusto-conical recess or nose of the first outer part of the pin, and the other plug having a frusto-conical recess or nose adapted to receive the frustoconical nose or recess of the second outer part of the pin, with at least one plug being rotationally adjustable, whereby radially inward plug movement displaces the centre piece of the pin and consequently the tool along the axis of rotation of the tool to eliminate play between the tool and holder at seating faces defined by a radial abutment shoulder of the tool and a radial annular face of the holder.
Conveniently, one only of the plugs, conveniently a male plug, is adjustable, preferably by having an hexagonally recessed head engageable by an allen key.
Radial outward plug movement, again conveniently of the male plug only, provides for removal of the tool shank from the holder socket once the nose of the male plug has been retracted from the socket.
The various aspects of the invention will now be described in greater detail by way of examples only with reference to the accompanying drawings, in which:
Figure 1 is an axial sectional view through a pin in accordance with the first aspect, a rotary tool in accordance with the second aspect, and a tooling system in accordance with the third aspect; and
Figure 2 is a view on one end of the pin of Figure 1.
In Figure 1 is shown a reamer 1, having an axis of rotation 2, a co-axial shank 3 of circular section in which there is a diametral bore 4 in which is housed a load transmitting pin 5 in accordance with the first aspect of the invention.
The pin 5 comprises a circular centre piece 8, having a longitudinal axis 9 and a pair of mutually diverging (e.g.
o at 12 ) outer faces 10, terminating at an annular abutment surface 11 adapted, in use, to engage a portion 12 of the reamer 1. The pin 5 also has a first outer part 13 having at an outer end 14 a frusto-conical recess 15 and at an inner end
o 16 a 12 force transmission face 17 adapted to seat on one diverging outer face 10 of the centre piece 8. The pin 5 also has a second outer part 18 having at an outer end 19 a
o frusto-conical nose 20 and at an inner end 21 a 12 force transmission face 22 adapted to seat on the other diverging o-uter face 10 of the centre piece 8; while the centre piece 8 has a greater axial length 23 than the corresponding dimension 24 of the first and second outer parts 13, 18; and the pin 5 has means to secure the first and second outer parts 13, 18 to the centre piece 8 to define a unitary pin, such means being a first connector 25 eg of nylon (Trade Mark) between the first outer part 13 and the centre piece 8, and a second Nylon (Trade Mark) connector 26 between the second outer part 18 and the centre piece 8. The centre piece is provided with a through hole 27 for the flow of coolant, with the securing means 25, 26 extending orthogonally of the coolant hole.
The shank 3 is housed in a socket 5 of a tool holder 7, the reamer 1 and holder 7 having co-incident axes of rotation.
The axial length 23 of the centre piece 8 approximates to diameter of the bore 4, and the corresponding dimensions 24 of the first and second outer parts 13, 18, are less than diameter of the bore 4. The shank 3 is provided with a radial, tapped hole so that a screw 28 passed along the hole engages a flat or neck intermediate the ends of the centre piece 8 to ensure correct orientation of the centre piece 8 and to prevent inadvertent loss of the pin 5 from the reamer 1 during reamer fitting or changing operations. By correct orientation is meant that the abutment surface 11 is distal from the reamer 1. Also, the overall dimension of the centre piece and the two outer parts 13, 18 of the pin 5 is less than the length of the diametral bore 4, in the assembled condition of the pin 5, i.e. when the two outer parts 13, 18 are secured to the centre piece by the connectors 25 and 26.The holder 7 is provided with two tapped holes 29 intersecting the socket 6 and being on a common, diametral axis 30 co-incident, or generally so, with the axis of the diametral bore 4 of the reamer 1. A plug is screwed into each tapped hole, one plug 31 having a frusto-conical nose 32 adapted to engage the frusto-conical recess 15 of the first outer part 8 of the pin 5, and the other plug 33 having a frusto-conical recess 34 adapted to receive the frusto-conical nose 20 of the second outer part 18 of the pin 5, with at least one plug 31 being rotationally adjustable by having a hexagonally recessed head engageable by an allen key, whereby radially inward plug movement displaces the centre piece 8 of the pin and consequently the reamer 1 along the axis of rotation 2 of the tool to eliminate play between the reamer 1 and holder 7 at seating faces defined by a radial abutment shoulder 35 of the reamer 1 and a radial annular face 36 of the holder 7.
Claims (16)
1. A load transmitting pin comprising:
(i) a centre piece, having a longitudinal axis and
a pair of mutually diverging outer faces
terminating at an annular abutment surface
adapted, in use, to engage a portion of a
tool;
(ii) a first outer part having at an outer end a
frusto-conical nose or recess and at an inner
end a force transmission face adapted to seat
on one diverging outer face of the centre
piece;
(iii) a second outer part having at an outer end a
frusto-conical recess or nose and at an inner
end a force transmission face adapted to seat
on the other diverging outer face of the
centre piece;
(iv) the centre piece having a greater axial length
than the corresponding dimension of the first
and second outer parts; and
(v) means to secure the first and second outer
parts to the centre piece to define a unitary
pin.
2. A pin as claimed in Claim 1, wherein the outer
o faces of the centre piece diverge at 12 and consequently the force transmission faces of the first and second outer parts
o are also at 12
3. A pin as claimed in Claim 1 or Claim 2, wherein the securing means comprises at least one elongate, connector such as a wire etc.
4. A pin as claimed in Claim 3, comprising a single, elongate connector at opposite ends to the first and second outer parts.
5. A pin as claimed in Claim 3, comprising two connectors, a first connector between the first outer part and the centre piece, and a second connector between the second outer part and the centre piece.
6. A pin as claimed in any preceding Claim, wherein the centre piece is provided with a through hole for the flow of coolant, in which case the securing means extends orthogonally of the coolant hole.
7. A pin as claimed in any preceding Claim, wherein the centre piece is of circular section.
8. A pin as claimed in any preceding Claim, provided with a flat or a neck intermediate its ends.
9. A pin substantially as hereinbefore described with reference to the accompanying drawings.
10. A rotary tool such as a reamer, having an axis of rotation, a co-axial shank of circular section in which there is a diametral bore in which is housed a load transmitting pin in accordance with any preceding Claim, the axial length of the centre piece approximating to the bore diameter, and the corresponding dimensions of the first and second outer parts being less than the bore diameter.
11. A tool as claimed in Claim 10, wherein the shank is provided with a radial, tapped hole so that a screw passed along the hole engages the flat or neck, to orientate correctly the centre piece and to prevent inadvertent loss of the pin from the tool during tool fitting or tool changing operations.
12. A tool as claimed in Claim 10 or 11, wherein the overall dimension of the centre piece and the two outer parts of the pin is less than the length of the diametral bore, in the assembled condition of the pin, i.e. when the two outer parts are secured to the centre piece by the securing means.
13. A tool substantially as hereinbefore described with reference to the accompanying drawings.
14. A tooling system comprising a tool holder having an axis of rotation, a co-axial socket provided in the tool holder, the shank of a tool in accordance with any of Claims 10 to 13, fitted into the socket, the tool and holder having co-incident axes of rotation, and the holder provided with two tapped holes intersecting the socket and being on a common, diametral axis co-incident, or generally so, with the axis of the diametral bore of the tool, a plug screwed into each tapped hole, one plug having a frusto-conical nose or recess adapted to engage the frusto-conical recess or nose of the first outer part of the pin, and the other plug having a frusto-conical recess or nose adapted to receive the frustoconical nose or recess of the second outer part of the pin, with at least one plug being rotationally adjustable, whereby radially inward plug movement displaces the centre piece of the pin and consequently the tool along the axis of rotation of the tool to eliminate play between the tool and holder at seating faces defined by a radial abutment shoulder of the tool and a radial annular face of the holder.
15. A tooling system as claimed in Claim 14, wherein one only of the plugs, conveniently a male plug, is adjustable, preferably by having an hexagonally recessed head engageable by an allen key.
16. A tooling system substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB919105366A GB9105366D0 (en) | 1991-03-13 | 1991-03-13 | Metal cutting tooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9204822D0 GB9204822D0 (en) | 1992-04-22 |
| GB2253580A true GB2253580A (en) | 1992-09-16 |
Family
ID=10691536
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB919105366A Pending GB9105366D0 (en) | 1991-03-13 | 1991-03-13 | Metal cutting tooling system |
| GB9204822A Withdrawn GB2253580A (en) | 1991-03-13 | 1992-03-06 | Metal cutting tooling system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB919105366A Pending GB9105366D0 (en) | 1991-03-13 | 1991-03-13 | Metal cutting tooling system |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9105366D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496301A (en) * | 2020-06-09 | 2020-08-07 | 深圳市创裕达电子有限公司 | Intelligent milling cutter for metal products |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154481A (en) * | 1984-02-23 | 1985-09-11 | Komet Stahlhalter Werkzeug | Machine tool spindle and tool holder suitable therefor |
| GB2195273A (en) * | 1986-09-20 | 1988-04-07 | Komet Stahlhalter Werkzeug | Device for connecting two tool parts |
| GB2212745A (en) * | 1987-11-24 | 1989-08-02 | Komet Stahlhalter Werkzeug | Device for the connecting of two machine parts, in particular two tool portions of machine tools |
-
1991
- 1991-03-13 GB GB919105366A patent/GB9105366D0/en active Pending
-
1992
- 1992-03-06 GB GB9204822A patent/GB2253580A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2154481A (en) * | 1984-02-23 | 1985-09-11 | Komet Stahlhalter Werkzeug | Machine tool spindle and tool holder suitable therefor |
| GB2195273A (en) * | 1986-09-20 | 1988-04-07 | Komet Stahlhalter Werkzeug | Device for connecting two tool parts |
| GB2212745A (en) * | 1987-11-24 | 1989-08-02 | Komet Stahlhalter Werkzeug | Device for the connecting of two machine parts, in particular two tool portions of machine tools |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496301A (en) * | 2020-06-09 | 2020-08-07 | 深圳市创裕达电子有限公司 | Intelligent milling cutter for metal products |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9204822D0 (en) | 1992-04-22 |
| GB9105366D0 (en) | 1991-04-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |