Classifications

• • 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
  • F16B2/00—Friction-grip releasable fastenings
  • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
  • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
  • F16B2/10—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using pivoting jaws
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C29/00—Bearings for parts moving only linearly
  • F16C29/10—Arrangements for locking the bearings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
  • B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
  • B23D35/002—Means for mounting the cutting members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
  • B23Q1/25—Movable or adjustable work or tool supports
  • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
  • B23Q1/28—Means for securing sliding members in any desired position
• • 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
  • F16B2/00—Friction-grip releasable fastenings
  • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
  • F16B2/04—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening internal, i.e. with spreading action
• • 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
  • F16B3/00—Key-type connections; Keys
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2322/00—Apparatus used in shaping articles
  • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

Definitions

• clamping screws engaging one of the elements and bearing against the other.
• clamping screws typically raise one of the elements out of contact with the broad, bottom surface of the dove tail groove and place undue stresses on the angled sides formed by the gibs.
• the present invention relates to a cam lock for clamping tool elements together in a desired orientation.
• the cam lock acts on the inclined surface of a female gib formed on one side of a groove in one of the tool elements.
• the other tool element is slidably received in the groove such that, as the cam lock is rotated, it exerts a force on the second tool element to force it against the opposite side of the groove as well as the base of the groove.
• the cam lock acts on a significant surface area of the gib so as to distribute the stresses over a maximum area. Furthermore, by urging the second tool element in contact with both the opposite side of the groove and the base of the groove, it enables the tool elements to be utilized under severe working conditions while maintaining them in their clamped positions.
• the cam lock element is rotatably mounted within the second of the tool elements and defines a clamping surface and a force receiving surface.
• the clamping surface bears against the inclined side of the female gib, while the force receiving surface bears against the inclined side of the female gib, while the force receiving surface bears against an end of a force element, such as a threaded screw, which exerts a rotative force on the cam member.
• FIGURE 1 is a front view of the locking cam member according to the invention.
• FIGURE 2 is a top view of the locking cam member shown in FIGURE 1.
• FIGURE 3 is a cross-sectional view of the locking cam member taken along line A-A in FIGURE 1.
• FIGURE 4 is a side view of the locking cam member shown in FIGURE 1.
• FIGURE 5 is a front view of tool elements incorporating the locking cam member according to the invention.
• FIGURE 6 is a side view of the tool elements shown in FIGURE 5.
• FIGURE 7 is a cross-sectional view of the tool elements taken along line B-B in FIGURE 5.
• FIGURE 8 is a side view of a portable lathe incorporating the tool elements shown in FIGURES 5-7.
• FIGURE 9 is a side view, similar to FIGURE 6, showing an alternative tool holding member.
• FIGURE 10 is a side view, similar to FIGURE 6, showing a second alternative tool holding member.
• the locking cam member 10 is shown in Figures 1-4 and comprises a generally cylindrical body 12 having a longitudinal axis 14. Cylindrical body 12 defines a clamping surface 16 which extends substantially radially from longitudinal axis 14, as shown in Figures 3 and 4. A pair of force receiving surfaces 18 are also formed on the cylindrical body 12. Although the invention will be described as incorporating a pair of such force receiving surfaces, it is to be understood that more or less of these surfaces may be utilized without exceeding the scope of the invention. The exact number will vary according to the overall length of the locking cam member and the amount of clamping force that is required..
• the force receiving surfaces 18 also extend substantially radially outwardly from the longitudinal axis 14 and define an included angle with the clamping surface 16.
• Angle** is an obtuse angle and may be on the order of 150°.
• Clamping surface 16 defines an angle T with respect to surface 20, which angle is approximately 90°.
• a first tool element 22 which may be a mounting bracket or the like, defines a groove having a first side forming a female gib 24, a groove bottom 26 and a second, opposite side 28.
• female gib 24 defines an acute angle with bottom 26 as shown in Figure 7.
• a second tool element 30 is slidably received in the groove defined by tool element 22 such that it may be moved in a direction along axis 32, shown in Figure 5.
• adjusting screw 34 is rotatably mounted to bracket 36 which, in turn, is attached to tool element 22. Adjusting screw 34 threadingly engages tool element 30 such that rotation of knob 38 causes tool element 30 to traverse along axis 32.
• Locking cam member 10 is rotatably mounted within tool element 30 such that its longitudinal axis 14 extends generally parallel to the direction of motion along axis 32.
• a pair of clamping screws 40 are threaded into tool element 30 such that their ends contact force receiving surfaces 18.
• the locking cam member 13 is caused to rotate about longitudinal axis 14 in a counterclockwise direction as indicated by arrow 42 in Figure 7. Such rotation brings clamping surface 16 into contact with female gib 24 thereby exerting a force on tool element 30 causing it to move into engagement with bottom 26 and side 28 of the groove.
• Tool element 30 may have a cutting tool 44 attached thereto via tool clamping screws 46, as shown in Figure 7.
• Tool 44 typically has a cutting edge 48 which bears against the surface of the article to be machined or cut.
• Tool element 22 may also define a plurality of holes 50 to accommodate screws 52 or the like so as to attach the tool element to a machining tool or the like.
• the locking cam member according to the invention may be utilized with any type of tool, it has found particular application in conjunction with a portable lathe.
• Portable lathes per se, are well known in the art and, as shown in Fig. 8, typically comprise a mandrel 54 having an expansible wedge mechanism 56 at one end to attach it to the interior of a pipe 58.
• Wedge clamping elements 60 expand radially outwardly to grip the interior of pipe 58.
• Figure 8 shows only one such clamping member, however, it is understood that such members are usually equally -6-
• the portable lathe also includes a cutting head 62 which may have a drive motor 64 attached thereto so as to rotate a cutting wheel 66.
• the tool element 22 is typically attached to the face of the cutting wheel 66 via bolts 52.
• Second tool element 30 is adjusted with respect to tool element 22 so as to bring cutting tool 44 into proper alignment with the end of pipe 58. Once the proper alignment has been achieved, clamping screws 40 are tightened so as to rotate the locking cam member 10 and to rigidly affix tool member 30 in its desired position.
• the cutting head 62 is fed. toward the end of pipe 58 so as to bring the cutting tool 44 into contact therewith by manual manipulation of feed mechanism 68.
• the specific details of the portable lathe such as the wedge clamping mechanism, the rotating mechanism, the cutting head and the feed mechanism form no part of this invention, and reference is made to U.S. Patent 4,422,356 to Pertle and U.S. Patent No. 4,437,366 to Astle for typical examples of portable lathe structures.
• the clamping member according to this invention may be utilized with any type of machine tool structure.
• tool element 30 may be shaped so as to accommodate a facing tool, as shown by 30a in Figure 9, or to accommodate a bevelling tool, as shown by 30b in Figure 10.
• the tool element 30a in Figure 9 may be used to clamp a facing tool (not shown) to a second tool element 22a.
• a manual adjustment screw is not shown In Figure 9, the operative relationships between tool element 30a and tool element 22a are the same as that previously described.
• the clamping screws 40 perform precisely the same function as set forth in the previous embodiments.
• Figure 10 shows a tool element 30b to which may be attached a bevelling tool to form a bevel on the end of pipe 58. Quite obviously, the precise type of cutting tool does not alter the relationships between the first and second tool elements, and the locking cam member.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Automatic Tool Replacement In Machine Tools (AREA)
• Drilling Tools (AREA)
• Clamps And Clips (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25483677

Family Applications (1)

Country Status (5)

Cited By (5)

Citations (4)

• 1987
  • 1987-12-22 JP JP62506323A patent/JP2672102B2/ja not_active Expired - Fee Related
  • 1987-12-22 EP EP88901195A patent/EP0297133A1/en not_active Withdrawn
  • 1987-12-22 AU AU12236/88A patent/AU1223688A/en not_active Abandoned
  • 1987-12-22 WO PCT/US1987/003377 patent/WO1988004736A1/en not_active Application Discontinuation
• 1988
  • 1988-08-23 KR KR1019880701028A patent/KR890700194A/ko not_active Application Discontinuation

Patent Citations (4)

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