US3653107A - Lathe tool - Google Patents

Lathe tool Download PDF

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Publication number
US3653107A
US3653107A US2478A US3653107DA US3653107A US 3653107 A US3653107 A US 3653107A US 2478 A US2478 A US 2478A US 3653107D A US3653107D A US 3653107DA US 3653107 A US3653107 A US 3653107A
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US
United States
Prior art keywords
bit
tool
faces
cutting edge
lathe tool
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 - Lifetime
Application number
US2478A
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English (en)
Inventor
Karl Hertel
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.)
Individual
Original Assignee
Individual
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
Priority claimed from CH38669A external-priority patent/CH496502A/de
Priority claimed from CH1086069A external-priority patent/CH507764A/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3653107A publication Critical patent/US3653107A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/04—Cutting-off tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1685—Adjustable position of the cutting inserts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/005—Set screws; Locking means therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2222—Tool adjustable relative to holder
    • Y10T407/2238—Tool adjustable relative to holder by adjustable or replaceable stop
    • Y10T407/224—Adjustable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
    • Y10T407/2292—Slidable jaw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/25—Cutters, for shaping including cut off tool

Definitions

  • bit is of a Shape Providing y manufacture and regrinding, and a long life.
  • the outline of the 52 us. 0.... ..29/96, 29 95 lateral faces of the bit is an elongate isosceles trapezium and [51] Int.
  • the invention relates to a lathe tool having a tool bit which is releasably clamped to a tool holder.
  • Lathe tools of this kind with multiple-edge tool bits are already known, and the tool bits can be provided with three or four cutting edges.
  • the lateral faces of these tool bits are accordingly substantially in the form of an equilateral triangle or a square. They are secured in a recess appropriate to their external configurations on a tool holder by a screwed connection. In order to bring the next cutting edge into a cutting position after one cutting edge has become worn, the screwed connection has to be released and the bit rotated appropriately.
  • the production of such tool bits, more particularly for parting and cutting tools is complicated and involves a considerable proportion of rejects, since all three or four cutting edges must be identical as regards dimensions and shape and also more particularly with parting tools their cutting edges must be clean to optical standards and must be sharp.
  • the overall height of the bits of tools of this kind is relatively considerable and consequently does not allow the tools equipped therewith to be of small overall height, which is necessary for many operating conditions.
  • Vibration free and robust fixing of the bits in known parting tools is possible only to a very limited extent.
  • the cutting depths are also limited if the bit volume is not to be in an unfavourable ratio to the cutting bit available, and special measures are taken for securely fixing the bit.
  • additional measures for the secure fixing of bits generally result in hindering the free discharge of the chips or swarf, and this is particularly necessary for parting tools.
  • a bit for a lathe tool having lateral faces which have the outline of an elongate isosceles trapezium and an elongate isosceles triangle having as its base the longer of the two parallel sides of the trapezium, the end faces of the bit forming the equal sides of the trapezium, two inclined upper faces of the bit forming the two equal sides of the triangle and a cutting edge being formed at the junction of each upper face and the adjacent end face.
  • the invention also provides a lathe tool comprising a tool holder, a lathe tool bit having lateral faces which have the outline of an elongate isosceles trapezium and an elongate isosceles triangle having as its base the longer of the two parallel sides of the trapezium, the end faces of the bit forming the equal sides of the trapezium, two inclined upper faces of the bit forming the two equal sides of the triangle and a cutting edge being formed at the junction of each upper face and the adjacent end face, and means for releasably clamping said tool bit on said tool holder, with one of the cutting edges projecting from the holder to form the operative cutting edge.
  • the length and width of the bit can be optionally chosen without the ratio of bit volume to cutting edge length or cutting depth varying over-proportionally.
  • the cutting tool has a support available to below the cutting edge, providing security against fracture. Single or multiple re-setting of the bit is readily possible. As a result, the bit remains fully capable of operating even after being ground several times.
  • the tool is equally suitable as a parting tool, copying tool, threadcutting tool or knife tool.
  • the bit shape permits simple forming in a pressure sintering process. Grinding or regrinding is simple and the overall height and width of the tool can be kept very small.
  • the clamping means may act on the upper face of the bit remote from the operative cutting edge, so that it does not prejudice free removal of chips or swarf.
  • the pressure direction of the clamping element extends perpendicularly through the bisector of the angle between the upper bit face situated remote from the operative cutting edge and the two parallel sides of said trapezium.
  • the clamping element may be a clamping bolt which is retained within the holder and bears on the surface of the bit from the side.
  • the clamping bolt is provided with projections abutting on the two lateral faces of the bit. In this way the bit is secured against lateral displacement.
  • the clamping bolt rests in a recess arranged at the junction of the two upper faces of the bit. As a result a further locking effect counteracts the feed pressure acting on the bit. Also free chip or swarf removal is not prevented despite the forward shifting of the clamping bolt.
  • the side edges of the recess may be bevelled, so that an external projection of the clamping bolt abuts on the outer bevel surface, as viewed from the tool.
  • the clamping of the bit is substantially improved, since between that part of the clamping bolt which abuts on the bevel edge surface and the main cutting pressure receiving surface and the lateral abutment surface on the tool holder a wedge-like clamping system is provided.
  • the lateral faces of the bit converge in the direction away from the upper faces.
  • the central portion of the lateral faces of the bit extend approximately parallel to one another. The resulting increase in the size of the supporting surface improves the stability of the bit.
  • the lateral faces of the bit adjacent the cutting edges are laterally offset in opposite directions relative to the vertical longitudinal central plane of the bit. This also increases the stability ofthe bit.
  • the end thereof remote from the operative cutting edge may abut against a back-pressure stop.
  • the use of the back-pressure stop is recommended more particularly when the clamping of the bit is effective on the upper face of the bit remote from the operative cutting edge.
  • the back-pressure stop facilitates adjustment of the tool after the bit has been ground.
  • the back-pressure stop may be the generated surface of a bolt which is mounted to be eccentrically rotatable in the holder relative to its centre axis and may be the head ofa bolt which is arranged eccentrically with respect to the centre axis. This permits a particularly inexpensive manufacture.
  • the back-pressure stop comprises a member which is freely rotatable in the tool holder about an axis substantially coincident with the cutting edge remote from the operative cutting edge and said member is provided with two abutment points abutting on the tool bit.
  • This feature makes it possible in a sense to convert the back-pressure acting on the bit during operation into an application pressure which acts on the face of the cutting edge situated in the inoperative position and which considerably promotes vibration-free clamping of the bit and in some cases may even make it unnecessary to provide any further clamping elements.
  • the back-pressure stop member is the head of a bolt screwed into the holder, and the abutment surfaces are the side boundary surfaces of a sector shaped notch formed in the bolt head.
  • the centre of the screw head can be drilled out in order to avoid damage to the cutting edge of the bit which is in the inoperative position.
  • the lower face of the bit bounded by the shorter parallel sides of the trapezia and which rests on an appropriate abutment surface of the holder comprises two flat faces converging towards one another, and joining in a straight apex line resting on the tool holder.
  • the converging faces form a V-shaped support and the corresponding construction of the main cutting pressure receiving surface of the tool holder makes it impossible for the clamped tool bit to be pressed off laterally.
  • the resulting wedge-shaped association between main cutting pressure receiving surface and clamping means pressure surface further improves clamping reliability during operation.
  • the lateral faces are offset relatively to one another in the longitudinal direction of the bit and those sides of the triangles form the cutting edges which open into the outermost cutting edge relatively to the longitudinal direction of the bit.
  • the bit can be used as a copying tool wherein generally the main cutting edge extends in the infeed direction of the corss-slide of the copying lathe and thus parallel to the longitudinal direction of the lathe tool.
  • the clamping of the bit also makes it possible to choose very small cutting edge angles for the bit without endangering clamping and positional reliability.
  • bit lateral face partial lateral face adjoining the back of the particular main cutting edge in the direction towards the middle of the bit extends parallel to the vertical longitudinal central plane of the bit.
  • FIG. 1 is an exploded perspective view of one embodiment of lathe tool according to the invention
  • FIG. 2 is a perspective view on a larger scale of the bit used in the tool of FIG. 1;
  • FIG. 3 is a side view of the tool of FIG. I assembled ready for use
  • FIG. 4 is a sectional view taken on the line IVIV of FIG. 3;
  • FIG. Si is a view, similar to FIG. 1, of a second embodiment
  • FIG. 6 is a side view on a larger scale of the bit used in the tool of FIG.
  • FIG. 7 is a sectional view taken on the line VIIVII of FIG.
  • FIG. 8 is a view, similar to FIG. I, of a third embodiment
  • FIG. 9 shows a perspective view on a larger scale of the back-pressure stop used in the embodiment of FIG. 8;
  • FIG. 10 is a perspective view, on a larger scale, of the bit used in the embodiment of FIG. 8;
  • FIG. I1 is a sectional view taken on the line XIXI of FIG. 10;
  • FIG. 12 is a view, similar to FIG. 10, of a modified form of bit particularly for short cutting edges;
  • FIG. 13 shows a side view of a further embodiment of bit, more particularly for copying purposes
  • FIG. 14 shows a side view of the bit according to FIG. 13 which is rotated relatively to FIG. 13 through 180 about the side edge of its main cutting pressure supporting surface;
  • FIG. 15 is a perspective view of a modification of the bit of FIGS. 13 and 14;
  • FIG. 16 is a sectional view taken on the line XVI-XVI in FIG. 15;
  • FIG. 17 is a side view of the front part of a tool holder with a bit of FIG. 13 fixed therein;
  • FIG. 18 is a plan view on to the holder according to FIG. 17 in the direction of the arrow XVIII;
  • FIG. 19 is a sectional view taken on the line XIXXIX of FIG. 17.
  • the lathe tool which is shown in FIG. 1, more particularly for use as a parting tool, consists of a tool holder 1, a bit shown generally at 2, an adjustable back-pressure stop 3, a clamping means or element 4 and a pressure screw 5 which operates the clamping element.
  • the holder 1 At its front end the holder 1 is provided with a recess 6, having a co-operating shape to that of the bit 2. More particularly, the holder 1 comprises a projecting rib 7 forming the main cutting pressure receiving surface 8 which extends forwards from the recess 6. The main cutting pressure receiving surface 8 supports the bit 2 over its entire base or main cutting pressure supporting surface.
  • the two boundary surfaces 9 of the bit 2 have the outline of an elongated isosceles trapezium 10 whose longer parallel side 1 1 forms the base of an isosceles triangle 12.
  • the main cutting pressure supporting surface of the bit which rests on the main cutting pressure receiving surface 8 of the holder 1 and corresponds to the shorter parallel side 13 of the trapezium comprises two flat faces 14, 15 which converge downwardly to a straight apex line 16, which extends parallel to the parallel sides 11, I3 of the trapezium 10.
  • the upper faces 16a, 17 and the end faces 18, 19 of the bit respectively are formed by equal sides of the triangle and the equal sides of the trapezium. These faces will extend at about the same angle 20 into the two boundary surfaces 9.
  • the junction of each upper face and the adjacent end face forms a cutting edge 21, one of which projects beyond the tool holder to form the operative cutting edge.
  • the upper face 17 remote from the operative cutting edge is acted upon by the clamping element 4, which includes a shank 22 mounted in a bore 23 of the holder 1 and a head 24, which projects laterally above the shank 22 and bears on the upper face 17 of the bit.
  • the longitudinal axis of the clamping element 4, which coincides with its pressure direction, extends perpendicularly to the bisector 26 of the angle between the upper face 17 and the parallel sides 11, I3 of the trapezium 10.
  • the clamping bolt 22 is provided with a notch 27, the side surface 28 of which is acted upon by the pressure screw 5 which is screwed into the holder 1.
  • the end face 19 of the bit remote from the operative cutting edge, abuts against the adjustable back-pressure stop 3, which is the generated surface of a bolt 31, which is mounted on the holder 1 so as to be rotatable eccentrically with respect to its center axis 33 and to be lockable in a desirable position.
  • the bacl -pressure stop is the head 33, arranged eccentrically with respect to the center axis 30 of a bolt which threadedly engages in a screwthreaded bore 32 in the holder 1.
  • FIG. 5 shows a modification in which the two upper faces 16a, 17 of the bit 2, instead of meeting in a straight apex line 34, are joined by a recess 40. Otherwise the geometric form of the bit 2' corresponds to the geometric form of the bit 2.
  • the part 41 of the bit 2' rests in the recess 40 and is provided with projections 42, 43 abutting laterally on the two lateral faces 9.
  • the projections 42, 43 abut the recess 40 on two plane parallel abutment surfaces 44, 45, with a sliding fit.
  • the back-pressure stop 46 is a bolt which is secured on the holder 1 extending approximately in the direction of the longitudinal central plane 75 of the bit and the main cutting pressure component, the said bolt having its generated surface facing towards the bit provided with a V- shaped or sector-shaped notch 46a in such a manner that the end face 19 and the upper face 17 of the bit remote from the operative cutting edge abut on the two side surfaces 46b and 460 of the notch 46a.
  • the bolt 46 is mounted in the bore 464 of the holder 1 and is anchored therein by a transverse bolt 46e, which extends diametrally through the bolt 46 and is itself screwed to the holder 1.
  • the transverse bolt 46a extends through the bolt 46 with considerable play permitting slight rotational and translational movement of the bolt 46 within the bore 46d. This enables an automatic adaptation of the back-pressure bolts 46 to particular manufacturing inaccuracies of the bit 2'.
  • the lathe tool which is shown in FIG. 8 and which is also especially suitable for parting purposes is constructed similarly to the lathe tool shown in FIGS. 1 and 5. It comprises a tool holder 58, a bit 59, a back-pressure stop 50, a clamping bolt 60 and a pressure screw 61 operating the clamping bolt 60.
  • the holder 58 is provided at its front end with a recess 62, having an outline corresponding to that of the bit 59.
  • the holder 58 is provided with a projecting rib 63 providing the main cutting pressure receiving surface 64, which supports the bit 59 over its entire lower surface 66.
  • the bit 59 is similar to the bit shown in FIG. 5, but the lower face 66 is plane, and the side surfaces of the recess 67 are bevelled in such a manner that larger bevel edge surfaces 68 are formed.
  • the bevel edge surfaces 68 extend at an obtuse angle into the part-cylindrical surface 69 of the recess 67.
  • the inner surface 70 of the clamping bolt projection 71 has an inclination corresponding to the bevel edge surfaces 68 in such a manner that the projection 71 is in surface contact with the bevel edge 68.
  • the faces 73, 74 of the bit 59 are offset laterally in opposite directions to one another relatively to the vertical longitudinal central plane 75 of the bit. Otherwise the bit construction corresponds to the construction shown in FIG. 10.
  • the parts 60, 61 (FIGS. 8 and 11) necessary for the clamping of the bit 59 operate in corresponding manner to the corresponding parts 4, 5 described in more detail with reference to FIG. 5.
  • a particularly advantageous back-pressure stop 50 has been used, which can be used equally with the tools or bits shown in FIGS. 1 to 7. It is mounted on the holder 58 to be freely rotatable about an axis 51 extending approximately at right angles to the longitudinal central plane of the bit 59.
  • the axis 51 coincides approximately with the bit cutting edge which is in the inoperative position.
  • the back-pressure stop 50 comprises two supporting points which adjoin the end face 19 and upper face 17 of the bit, the points being formed on the side boundary surfaces 52, 53 of a V-shaped or sector-shaped notch 55 in the head 54 ofa screw threaded into a bore 32 of the holder 58.
  • the screw head is axially bored at 56 in order to surround the bit cutting edge which is in the inoperative position with contact and without any risk of damage.
  • the head 54 is provided with a slot 57, to facilitate screwing into the holder 1.
  • the two lateral faces 75' of the bit 76 shown in FIGS. 13 and 14 have the outline form of an elongated trapezium 77 whose longer parallel side 78 forms the base of an isosceles triangle 79.
  • the two lateral faces 75' of the bit 76 are offset relatively to one another to the extent 83 in the longitudinal direction 82 of the bit.
  • the offsetting direction in this embodiment is so chosen that a left-hand cutting bit is provided. If the offsetting is in the opposite direction, a right-hand cutting bit or tool is provided.
  • the angle 84 between the faces 85, 86 of the bit 76 and the vertical bit longitudinal central plane 87 varies.
  • the amount 83 of the relative longitudinal displacement of the side boundary surface 75 in the longitudinal direction 16 determines the amount of the angle of rake of the bit.
  • the cutting edge point associated with the bit cutting edge 88, 89 are designated as 90, 91.
  • the front end surfaces 92, 93 of the bit 76 are the backs of the secondary cutting edges 94, 95.
  • the amount 83 of the relative longitudinal displacement of the lateral faces 75 also influences the amount of the angle of rake 96 or 97 of the bit.
  • the clamping bolt 98 coincides as regards its operation with the clamping bolt shown in FIGS. 1-11. It also rest on the particular face 85 of the bit 76 which happens to be situated in the inoperative position. Owing to the angle of rake (similar to the angle 84) of the particular face 85 which is in the inoperative position, with surface contact of the head of the clamping bolt 98 on the bit side which is in the inoperative position, a pressure is exerted which forces the bit 76, in the manner ofa wedge, into the angle between the main cutting pressure receiving surface 99 and the feed pressure supporting surface 100.
  • the partial lateral faces designated as 102 are the back of the cutting edges 88, 89. Since the back of each cutting edge deviates from the vertical in order to form the clearance angle, the position of the partial lateral faces 102 of the bit 76 also deviates from the vertical in the manner shown in FIG. 19. In contrast, the partial side boundary surfaces 103 extend parallel to the vertical longitudinal central plane 87 of the bit. Whereas in the bit according to FIGS. 13, 14 and I7 the main cutting pressure supporting surface is plane, in the bit according to FIGS. 15 and 16 a pair of downwardly convergent flat faces is provided for the main cutting pressure supporting surface 105.
  • the feed pressure supporting surface extends to the forward boundary edge of the back of the secondary cutting edge of the bit, as the plan view in FIG. 18 shows, Otherwise the form of the recess in the holder or the surface of the back-pressure stop is adapted to the contour of the adjoining part of the bit.
  • a particularly simple embodiment of the bit 76 is obtained if the two lateral boundary surfaces 75' extend in plane parallel manner relatively to one another over their entire length. This is possible since the bit 76 is to be used primarily for a cutting tool and not for a parting tool.
  • the support of the bit 76 need only be slightly inclined in such a manner that the bit 76 is swung to the extent of the desired clearance angle in the clockwise direction (FIG. 19) about its longitudinal axis which is disposed at right angles to the plane of the drawing.
  • the back-pressure stop 3' is constructed as a stationary element in FIGS. 17 and 18. However, preferably it is also proposed with the bit 76 to use as the back-pressure stop 8 a bolt which is constructed in accordance with the bolt 46 (FIG. 5), and whose V-shaped notch 46a corresponds geometrically to the cutting edge 94 or of the bit 76 which is in the inoperative position.
  • a lathe tool comprising, in combination:-
  • lateral faces to said tool bit having the outline of an elongate isosceles trapezium comprising two equal sides and longer and shorter parallel sides and an elongate isosceles triangle having as its base the longer of said parallel sides; d. end faces to said bit forming the equal sides of said isosceles trapezium;
  • g. means releasably clamping said tool bit on said tool holder, with one of said cutting edges projecting from said holder to form the operative cutting edge.
  • a lathe tool as claimed in claim I wherein at least a portion of said lateral faces converge towards one another away from said upper faces to form side clearance angles.
  • a lathe tool as claimed in claim 11, wherein the backpressure stop comprises an eccentric head of a bolt rotatably mounted transversely of said tool holder and abutting the end face of the tool bit remote from the operative cutting edge.
  • a lathe tool as claimed in claim 11, wherein the back pressure stop comprises a member freely rotatable in the tool holder about an axis substantially coincident with the cutting edge remote from the operative cutting edge and said member is provided with two abutment points abutting said tool bit.
  • said back pressure stop member comprises the head of a bolt rotatably mounted in said tool holder, and a sector-shaped notch formed in said head, the side surfaces of said notch abutting the upper face and the end face of said tool bit remote from said operative cutting edge.
  • a bit for a lathe tool comprising a body having lateral faces which have the outline of an elongate isosceles trapezium and an elongate isosceles triangle having as its base the longer of the two parallel sides of the trapezium, the end faces of the bit forming the equal sides of the trapezium, two inclined upper faces of the bit forming the two equal sides of the triangle and a cutting edge being formed at the junction of each upper face and the adjacent end face.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Knives (AREA)
  • Milling Processes (AREA)
US2478A 1969-01-13 1970-01-13 Lathe tool Expired - Lifetime US3653107A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH38669A CH496502A (de) 1969-01-13 1969-01-13 Einstichwerkzeug, insbesondere Einstich-Drehmeissel
CH1017969A CH516965A (de) 1969-01-13 1969-07-02 Einstichwerkzeug, insbesondere Einstich-Drehmeissel
CH1086069A CH507764A (de) 1969-07-16 1969-07-16 Werkzeug, insbesondere Kopier-Drehmeissel

Publications (1)

Publication Number Publication Date
US3653107A true US3653107A (en) 1972-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US2478A Expired - Lifetime US3653107A (en) 1969-01-13 1970-01-13 Lathe tool

Country Status (9)

Country Link
US (1) US3653107A (de)
JP (1) JPS4836231B1 (de)
BE (1) BE744365A (de)
CS (1) CS155227B2 (de)
DE (1) DE2000945C3 (de)
ES (1) ES184330Y (de)
FR (1) FR2028194A1 (de)
GB (1) GB1266811A (de)
NL (1) NL7000406A (de)

Cited By (19)

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Publication number Priority date Publication date Assignee Title
US3805350A (en) * 1972-11-29 1974-04-23 Warner Swasey Co Cutoff insert apparatus
US3846882A (en) * 1972-11-29 1974-11-12 Warner Swasey Co Cutoff insert apparatus
US3887974A (en) * 1974-08-01 1975-06-10 Kennametal Inc Cutting insert and holder therefor
US3911543A (en) * 1974-08-01 1975-10-14 Kennametal Inc Cutting insert and holder
US3987524A (en) * 1975-03-04 1976-10-26 Firma Robert Zapp, Werkzeug-Und Maschinenfabrik Gmbh Cutting tool
US4063841A (en) * 1976-07-08 1977-12-20 Posa-Cut Corporation Indexable insert for grooving tools
US4890961A (en) * 1986-11-20 1990-01-02 Montanwerke Walter Gmbh Lathe tool equipped with reversible plates for cutting grooves or threads
US4992007A (en) * 1987-10-14 1991-02-12 Iscar Ltd. Cutting insert and a tool holder therefor
US5156502A (en) * 1989-09-07 1992-10-20 Iscar Ltd. Cutting insert
EP1252954A1 (de) * 2001-04-24 2002-10-30 Sandvik Aktiebolag Ein- und Abstechwerkzeug
US6648560B2 (en) 2001-08-22 2003-11-18 Kennametal Inc. Cutting insert
US20040022591A1 (en) * 2002-06-10 2004-02-05 Wright Glenroy P. Spot eliminator
US20100003091A1 (en) * 2007-10-05 2010-01-07 Osg Corporation Diamond Cutting Member and Method of Making the Same
US20110274506A1 (en) * 2010-05-10 2011-11-10 Sandvik Intellectual Property Ab Indexable milling insert for milling tools
US20130129437A1 (en) * 2010-08-04 2013-05-23 Ceramtec Gmbh Cutting tool for recessing and grooving
US20130343825A1 (en) * 2012-06-22 2013-12-26 Kennametal Inc. Slotting cutter, cutting insert and tool therefor
CN103706819A (zh) * 2013-12-24 2014-04-09 无锡雨田精密工具有限公司 一种可调平双头内孔镗刀
WO2014174507A1 (en) * 2013-04-24 2014-10-30 Iscar Ltd. Tool holder having a clamping member with a non-circular cross-section and method for clamping a cutting insert therein
EP2788137B1 (de) * 2011-12-08 2018-02-28 Iscar Ltd. Werkzeughalter und verfahren zum spannen eines schneideeinsatzes darin

Families Citing this family (6)

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DE19948911B9 (de) * 1999-10-11 2010-08-05 Volker Neumann Halter für eine Schneidplatte bzw. Halter mit Schneidplatte
KR102602504B1 (ko) * 2016-01-12 2023-11-14 한화정밀기계 주식회사 스크린 프린터의 비전 검사 장치
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US3805350A (en) * 1972-11-29 1974-04-23 Warner Swasey Co Cutoff insert apparatus
US3846882A (en) * 1972-11-29 1974-11-12 Warner Swasey Co Cutoff insert apparatus
US3887974A (en) * 1974-08-01 1975-06-10 Kennametal Inc Cutting insert and holder therefor
US3911543A (en) * 1974-08-01 1975-10-14 Kennametal Inc Cutting insert and holder
US3987524A (en) * 1975-03-04 1976-10-26 Firma Robert Zapp, Werkzeug-Und Maschinenfabrik Gmbh Cutting tool
US4063841A (en) * 1976-07-08 1977-12-20 Posa-Cut Corporation Indexable insert for grooving tools
US4890961A (en) * 1986-11-20 1990-01-02 Montanwerke Walter Gmbh Lathe tool equipped with reversible plates for cutting grooves or threads
US4992007A (en) * 1987-10-14 1991-02-12 Iscar Ltd. Cutting insert and a tool holder therefor
US5156502A (en) * 1989-09-07 1992-10-20 Iscar Ltd. Cutting insert
KR100855334B1 (ko) * 2001-04-24 2008-09-04 산드빅 인터렉츄얼 프로퍼티 에이비 절단 및 홈가공 작업용 절삭공구
EP1252954A1 (de) * 2001-04-24 2002-10-30 Sandvik Aktiebolag Ein- und Abstechwerkzeug
US6648560B2 (en) 2001-08-22 2003-11-18 Kennametal Inc. Cutting insert
US20040022591A1 (en) * 2002-06-10 2004-02-05 Wright Glenroy P. Spot eliminator
US20100003091A1 (en) * 2007-10-05 2010-01-07 Osg Corporation Diamond Cutting Member and Method of Making the Same
US8087852B2 (en) * 2007-10-05 2012-01-03 Osg Corporation Diamond cutting member and method of making the same
US20110274506A1 (en) * 2010-05-10 2011-11-10 Sandvik Intellectual Property Ab Indexable milling insert for milling tools
US8475089B2 (en) * 2010-05-10 2013-07-02 Sandvik Intellectual Property Ab Indexable milling insert for milling tools
US9475123B2 (en) * 2010-08-04 2016-10-25 Ceramtec Gmbh Cutting tool for recessing and grooving
US20130129437A1 (en) * 2010-08-04 2013-05-23 Ceramtec Gmbh Cutting tool for recessing and grooving
US10478902B2 (en) 2010-08-04 2019-11-19 Ceramtec Gmbh Cutting tool for recessing and grooving
EP2788137B1 (de) * 2011-12-08 2018-02-28 Iscar Ltd. Werkzeughalter und verfahren zum spannen eines schneideeinsatzes darin
US20130343825A1 (en) * 2012-06-22 2013-12-26 Kennametal Inc. Slotting cutter, cutting insert and tool therefor
US8905684B2 (en) * 2012-06-22 2014-12-09 Kennametal Inc. Slotting cutter, cutting insert and tool therefor
US20140321926A1 (en) * 2013-04-24 2014-10-30 Iscar, Ltd. Tool Holder Having A Clamping Member With A Non-Circular Cross-Section And Method For Clamping A Cutting Insert Therein
US9656326B2 (en) * 2013-04-24 2017-05-23 Iscar, Ltd. Tool holder having a clamping member with a non-circular cross-section and method for clamping a cutting insert therein
WO2014174507A1 (en) * 2013-04-24 2014-10-30 Iscar Ltd. Tool holder having a clamping member with a non-circular cross-section and method for clamping a cutting insert therein
CN103706819A (zh) * 2013-12-24 2014-04-09 无锡雨田精密工具有限公司 一种可调平双头内孔镗刀

Also Published As

Publication number Publication date
JPS4836231B1 (de) 1973-11-02
BE744365A (fr) 1970-06-15
FR2028194A1 (de) 1970-10-09
GB1266811A (de) 1972-03-15
ES184330U (es) 1973-09-01
NL7000406A (de) 1970-07-15
DE2000945C3 (de) 1975-08-14
DE2000945A1 (de) 1970-07-30
DE2000945B2 (de) 1975-01-09
CS155227B2 (de) 1974-05-30
ES184330Y (es) 1974-06-16

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