WO2014177851A1 - Machine rotative de fraisage - Google Patents

Machine rotative de fraisage Download PDF

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Publication number
WO2014177851A1
WO2014177851A1 PCT/GB2014/051320 GB2014051320W WO2014177851A1 WO 2014177851 A1 WO2014177851 A1 WO 2014177851A1 GB 2014051320 W GB2014051320 W GB 2014051320W WO 2014177851 A1 WO2014177851 A1 WO 2014177851A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
spindle
clutch
component
chuck
Prior art date
Application number
PCT/GB2014/051320
Other languages
English (en)
Inventor
Matthew FARNSWORTH
Adam Brown
Daniel James Smith
Original Assignee
The University Of Sheffield
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
Application filed by The University Of Sheffield filed Critical The University Of Sheffield
Priority to EP14719848.5A priority Critical patent/EP2991793A1/fr
Publication of WO2014177851A1 publication Critical patent/WO2014177851A1/fr

Links

Classifications

    • 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
    • B23Q1/72—Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76—Steadies; Rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B23B3/30—Turning-machines with two or more working-spindles, e.g. in fixed arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B25/00—Accessories or auxiliary equipment for turning-machines
    • B23B25/06—Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/002—Milling elongated workpieces
    • 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
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/066—Bench vices
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/348—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission by means of clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/044—Clutches

Definitions

  • This invention relates to a mill turn machine and fixtures thereof.
  • this invention relates to a mill turn machine comprising a clutch and/or a saddle component and to those components for use in a mill turn machine.
  • Mill turn machines are used to machine material workpieces into component parts for a number of uses. These machines usually comprise a spindle and a chuck for holding a workpiece in an x, y, z position.
  • the spindle is configured to rotate about a rotation axis and has a "c-axis position" that defines its rotational orientation about the rotation axis relative to a known zero position.
  • a machining head is positioned by a numerically controlled machining arm to machine the workpiece while it is held stationary (milling operation) or as it is being rotated about the c-axis (turning operation).
  • To accurately position the machining arm the machine must know the x, y, z position of the workpiece as well as its c-axis position.
  • the c-axis is generally concentric with the z-axis. To ensure accuracy, the spindle is referenced/indexed to the zero position of the c, x, y and z axes before a machining operation commences.
  • Referencing may also be necessary after an emergency shutdown of the machine as caused by, for example, a power cut, human intervention, error, etc.
  • the workpieces commonly machined in mill turn machines are long thick-walled components which are held in the chuck of the spindle and extend axially therefrom.
  • thick- walled is meant a component of such rigidity that it is self-supporting.
  • a second spindle may be provided at the opposite end of the workpiece to the first spindle and used as a slave support to the workpiece. That is to say, the second spindle is used to hold the workpiece in the x, y, z position but allows it to freely rotate in the c-axis.
  • the second spindle must be driven.
  • driving the second spindle requires that it is also referenced/indexed in the c-axis.
  • Each spindle is referenced in the same direction with respect to its direction of rotation facing the workpiece, either clockwise or anticlockwise.
  • the referencing direction is normalised with respect to each spindle so that, where the spindles are not working simultaneously on the same workpiece, the machine is able to reference each separately. In this way a machining operation on either spindle will have the same tolerances. Therefore, when the machine is configured to hold a workpiece between two spindles, on a central axis, the spindles are referenced in opposite directions about that axis. This means that the workpiece must be removed prior to referencing, which causes significant delays in the machining process.
  • a mill turn machine comprising:
  • first and second chucks on the first and second spindles adapted to hold a workpiece between them about said axis
  • a clutch between at least one of said first and second chucks and its spindle, said clutch comprising a driving and a driven component, said driving component being connectable to said first or second spindle for rotation about said axis, and said driven component being
  • a workpiece secured between the chucks on the first and second spindles is rotatable by one spindle in a direction of rotation without rotating the other spindle in that direction when the clutch between said other spindle and its chuck, being the first or second spindle on which said clutch is disposed, is in said first, unlocked configuration.
  • said driven component is locked to said driving component by bolting the two components together. The driven component and the driving component can be unlocked by removing the bolts.
  • said driven component is movable along said axis, with respect to said driving component, between a first unlocked location and a second locked location.
  • said clutch may comprise a keyed joint having at least one key and at least one key slot, wherein in said first unlocked configuration, said key is disengaged with said key slot, and in said second locked location, said key is engaged with said key slot.
  • said driving component further comprises a bore for rotatably journaling a shaft of said driven component.
  • said shaft has an external diameter and comprises a first driven end and a second chuck end.
  • Said first driven end may have a diameter smaller than said external diameter so that a taper is formed at said first driven end.
  • said bore comprises a bush having an internal diameter greater than said external diameter of said shaft.
  • said bush may comprise said at least one key slot and said at least one key is disposed on an outside of said shaft.
  • said driven component is integrally formed with said first chuck.
  • the clutch is disposed between the first spindle and its chuck and there is no clutch between the second spindle and its chuck, so that in said first unlocked configuration only said first spindle is rotatably unlocked with respect to said workpiece, and in said second locked configuration said first and second spindles are rotatably locked to said workpiece.
  • the present invention provides a mill turn machine comprising: a first spindle journalled for rotation about a rotation axis;
  • first and second chucks on the first and second spindles adapted to hold a workpiece between them about said axis, the workpiece having first and second sides;
  • the saddle component adapted to support said workpiece during machining of the second side of said workpiece, said saddle component comprising a first bed adapted to fit against said first side of said workpiece and having a profile corresponding to the first side of said workpiece after machining thereof, opposite to said second side, to provide said support.
  • the first bed may not be ideally suited to support the second side of the workpiece during machining of the first side, but where the first side is the side of the workpiece to be machined first, the workpiece is likely to have greater integrity so that universal support provided by the saddle is not so important for efficient machining.
  • the first bed is shaped to fit the first side of the workpiece after it has been machined so that much greater support of the workpiece is provided.
  • said saddle is connectable to a moveable turret, said turret being movable between a first disengaged position and a second engaged position, wherein in said second engaged position, said saddle provides said support for said machining.
  • a clutch for a mill turn machine comprising the features of the clutch defined in relation to the mill turn machine as described above.
  • a saddle component for a mill turn machine comprising the features of the saddle component defined in relation to the mill turn as described above.
  • a method of referencing a mill turn machine comprising: a first spindle journalled for rotation about a rotation axis; a clutch; and a first chuck adapted to hold a workpiece, said method comprising the steps of:
  • step b) further comprises the step of:
  • steps a) and c) further comprise moving a driven component of said clutch along said axis with respect to a driving component of said clutch.
  • said workpiece is held between said first and second chucks and said first chuck is connectable to said driven component of said clutch, wherein said movement of said driven component is effected by movement of said second spindle along said axis.
  • Said method may further comprise the step of:
  • a method of machining a workpiece in a mill turn machine comprises the steps of: a) configuring a first and a second spindle to rotate about a rotation axis, said first spindle comprising a clutch and a chuck, said second spindle comprising a chuck;
  • step g) further comprises the step of positioning a saddle component to support a side of the workpiece during the machining of an opposite side of the workpiece.
  • a method of machining a workpiece in a mill turn machine comprises the steps of:
  • Figure 1 is a perspective view of a mill turn machine spindle according to the prior art
  • Figure 2 is a perspective view of a mill turn machine spindle according to an embodiment of the present invention
  • Figure 3a is a schematic cross-section of a clutch of a mill turn machine in a locked configuration according to an embodiment of the present invention
  • Figure 3b is a schematic cross-section of a clutch of a mill turn machine in an unlocked configuration according to an embodiment of the present invention
  • Figure 3c is a schematic cross-section of a clutch of a mill turn machine in an unlocked configuration according to an embodiment of the present invention
  • Figures 4a and b are respectively a schematic cross-section on the line A-A in Figure 4b of a clutch of a mill turn machine in a locked configuration according to an embodiment of the present invention, and a side view of the same arrangement;
  • Figure 5a is a schematic representation of a mill turn machine according to an
  • Figure 5b is a top view of a bed of a saddle component of a mill turn machine according to an embodiment of the present invention.
  • Figure 1 shows a spindle 10 of a mill turn machine (not shown) as known in the art.
  • the spindle is rotatable in a rotation c-axis about the z-axis 12.
  • Spindle jaws 14 are used to clamp a chuck 16 adapted to hold a workpiece (not shown) between chuck jaws 18.
  • the workpiece is machined using a tool positioned on a numerically controlled arm.
  • the machining operation may take the form of rotating the workpiece and placing a tool in its path (also known as turning), or moving a rotating tool with respect to the stationary workpiece (also known as milling).
  • the workpiece is held in a known x, y, z position by the chuck and, in turn, the spindle.
  • the rotation of the spindle about the z-axis is known as a c-axis rotation and has a c-axis value known by the machine.
  • a zero position on the c-axis is determined by referencing the spindle, which is usually performed by rotating the spindle to a known position and telling the machine that in that position the c-axis is zero, or another known value.
  • Referencing is commonly performed on start-up of the machine or before each machining operation. Some machines may also require referencing after emergency stop of the machine following scenarios such as a power cut or human intervention. Where the workpiece is held on only one spindle, referencing of that spindle is not a problem. However, it is desirable to machine workpieces that are held between two spindles. Commonly, the first spindle as described above will be driven and will therefore be referenced as and when necessary. The second spindle will usually act as a slave wherein it supports the workpiece in an x, y, z direction but does not prevent or create c-axis movement. In this approach, the second spindle does not need to be referenced as the first spindle provides all of the drive. By driving the spindle, the machine is also able to fix/hold the spindle in a known location to provide torque in resistance to a machining (milling) operation.
  • the torque is transmitted through the workpiece so that machining at an z-axis position distal to the first spindle is resisted by the c-axis torque provided at the first spindle.
  • this does not hold true, even when the workpiece is supported in both spindles.
  • the thin-wall is not rigid enough to transfer the torque and machining at a z-axis position distal to the first spindle may result in vibration of the workpiece.
  • Driving the second spindle provides torque at a location distal to the first (but proximal to the second) spindle and therefore helps to limit vibration of the workpiece during machining.
  • problems during machining of a workpiece may result in the need to recalibrate each of the spindles. This requires removal of the workpiece from one or both of the chucks. This is time consuming and may result in errors or damage to the workpiece.
  • the present invention addresses this problem.
  • Figure 2 shows an embodiment according to the present invention where a mill turn machine comprises a first spindle 20 and a first chuck 22 configured to rotate in a rotation c-axis about the z-axis and a second chuck (not shown) also configured to rotate in the rotation c-axis about the z-axis.
  • a clutch 24 is positioned between the first spindle 20 and the first chuck 22.
  • Figure 2 shows the clutch 24 in expanded form to comprise a driving component 26, a bush 28 and a driven component 30. The driving component is clamped in jaws 21 of the first spindle.
  • the bush 28 fixably locates inside a bore 32 of the driving component 26, and has an internal diameter 34 substantially similar to but greater than an external diameter 36 of the driven component 30 and so that the driven component 30 can rotatably slide inside the bush 28.
  • the driven component 30 is connected to the first chuck 22. This can be via a permanent or releasable fixing.
  • the bush 28 When assembled, the bush 28 fits inside the bore 32 of the driving component 26.
  • the driven component 30 then slides into the bush 28.
  • the driven component 30 is essentially a shaft that may comprise a taper 38 at a first driven end 40 to provide a smaller end diameter and therefore aid engagement of the driven component with the bush.
  • a slip region 42 is provided on the external diameter of the driven component such that insertion of the driven component inside the bush to a depth where the end 43 of the bush is in the slip region 42 permits free rotation of the driven component with respect to the bush and therefore with respect to the first spindle 20 also.
  • a keyed region 44 is provided on the external diameter of the driven component 30 distal to the driven end 40 such that insertion of the driven component inside the bush to a depth where the end 43 of the bush is in the keyed region 44 locks the driven component 30 to the bush 28, and thus in turn to the driving component 26, to enable torque transfer from the first spindle to the first chuck.
  • This is achieved by providing one or more of the keys 46 on the driven component that engage with one or more key slots 48 in the bush 28.
  • the keys 46 extend in a direction parallel to the z-axis and up to the slip region 42. Therefore, a
  • predetermined axial movement of the chuck in the z-axis allows the machine to switch between a first unlocked and a second locked configuration and vice-versa.
  • Figures 3a-c further depict the first unlocked and second locked configurations.
  • the clutch component 24 is configured so that the depth of insertion 52 is less than the axial length of the slip region 42.
  • Figure 3b shows a cross-section through a region of the clutch where the key slots 48 and the keys 46 are present.
  • Figure 3c shows a cross-section through a region of the clutch where the key slots 48 are not present but the keys 46 are present.
  • Figure 3a shows a cross-section through the clutch in the second, locked configuration.
  • the depth of insertion 52 of the driven component is greater than the axial length of the slip region 42 such that the keys 46 engage with the key slots 48.
  • the depth of insertion 52 of the driven component need only be enough for the keys 46 to engage with the key slots 48. It is, of course, preferable for the depth of insertion 52 to determine that the keys 46 fully engage with the key slots 48 because during manufacturing, the torque is transmitted through the keys, which if not fully engaged may fracture.
  • the axial movement of the first chuck is effected by movement of a workpiece (not shown) which is held in the chuck jaws 50 of the first and second chucks.
  • Axial movement of the second chuck is transferred by the workpiece to axially move the first chuck between the first unlocked and the second locked configuration.
  • the position of the second chuck is determined by the position of the second spindle, which is controlled by the mill turn machine. Therefore, on referencing of the machine while the workpiece is in place, the machine moves the second spindle away from the first spindle to unlock the clutch 24.
  • the first and second spindles are then individually referenced before the machine relocks the clutch 24 by moving the second spindle towards the first spindle. During this operation the x and y position of the workpiece is retained so that the position of the workpiece does not also require calibration.
  • FIGs 4a and 4b show an alternative embodiment of the present invention.
  • the bush 28' fits inside the bore 32' of the driving component 26'.
  • the driven component 30' slides in the bore of the bush 28' and in which it is freely rotatable.
  • Bolts 129 can be introduced through flanges 130 and 131 on the driving and the driven components to lock the driving and the driven components together.
  • the driven component forms a part of, or is connected by bolts (not shown) to, a standard chuck 22' (as described above).
  • the bolts 129 connecting the driven and the driving components are removed, allowing independent c axis rotation of the driven and driving components.
  • said driven and driving components include an electromagnetic connection between them, locking them together. Provided torque
  • said driven and driving components may comprise facing discs or like surfaces which are magnetically connected. Radially defined (or at least non- circumferentially defined) inter-engaging ridges and grooves may be disposed in the facing surfaces to resist any relative rotation between the discs when magnetically connected together.
  • Figure 5 shows another aspect of the present invention. Milling of components requires that the workpiece is held sufficiently stationary to provide a stable surface for accurate milling. On the z-axis, stability is provided by mounting the workpiece between two
  • spindles/chucks 10a, b spindles/chucks 10a, b.
  • the stability is provided by the torque supplied by the spindle which is transferred through the workpiece. This is the case especially if both spindles/chucks 10a, b are driven to counter deflections imposed by the milling tool.
  • the torque is possibly not transferred. Instead the workpiece is likely to bend or vibrate during machining by a tool pressing onto the thin workpiece.
  • FIGS 5a, b schematically show a saddle component 60 according to an embodiment of the present invention.
  • the saddle component is used when milling a thin-walled workpiece 62 held between a first spindle/chuck 10a and a second spindle/chuck 10b, each being centrally located on a z-axis 12'.
  • a machine arm 64 using a milling tool 66 is configured to mill a first side 68 of the workpiece 62 to form a first profiled side from a blank.
  • the saddle component 60 comprises a bed 70 adapted to support the second side (underside to the first side 68) of the workpiece during machining of the first side i.e.
  • Supports 72 are fixable to the non-supporting side of the bed 70 and are configured to rest on a surface.
  • the supports 72 may be shaped to attach the bed to a moveable turret (not shown) inside the mill turn machine.
  • moveable turrets can move in the x, y, z axis and support a tool used to machine the workpiece during a turning operation (see above description).
  • the supports 72 are adapted to attach to the moveable turret so that the positioning of the turret in turn positions the bed 70 under the workpiece 62.
  • the saddle component 60 is moved away (downward or otherwise) from the workpiece 72 and the machining arm 64 is moved away from the workpiece. If the second side of the workpiece 72 then requires machining, the spindles 12a, 12b, rotate the workpiece through 180 degrees in the c-axis, about the z-axis. The bed is then repositioned under the first side of the workpiece 62, which is now facing downwards, to support the workpiece while the machining arm 64 machines the second side.
  • the bed 70 comprises a surface profile 74, for example as shown in Figure 5b.
  • the surface profile 74 comprises reverse impressions 76 of features of the profiled first side of the workpiece (as milled by the machine before the workpiece is inverted) and so that the features (not shown) on profiled first side 62 of the workpiece fit onto corresponding features 76 on the surface 78 of the bed. This enables the bed to support parts of the workpiece that have been machined (for example, to have a thin profile) during the machining of the first side.
  • some features (eg feature 80) of the bed may be only provided for the support they represent of the workpiece during machining of the first side 68, but which features 80 are removed when the second side is machined because no recess into which the feature 80 would fit when machining the second side is actually desired or formed in the first side 68.
  • More than two surfaces of the workpiece may be presented for machining, in which event more than one saddle 60 might be employed.
  • the bed 70 of the saddle component 60 is preferably made from a vibration resistant material that does not resonate at a frequency close to that generated by the milling operation.
  • a polymer material such as polyurethane is often a suitable material, which may deform slightly on engagement of the saddle with the workpiece.
  • the workpiece is generally of a much harder material. It should not itself deform under contact from the saddle.
  • the force with which the saddle is pressed against the workpiece must not result in any measurable deformation of the workpiece, but may result in some deformation of the saddle and potentially more uniform support for the workpiece.
  • Dampening in the supports 72 may be provided to remove unwanted vibrations from the workpiece, but the bed must remain stationary to provide suitable support to the machining operation. It is preferred that the saddle component is used in conjunction with the clutch component described in relation to Figures 2-3, but the saddle component may be used where a clutch is not required, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Milling Processes (AREA)

Abstract

L'invention concerne une machine rotative de fraisage comprenant : une première broche tourillonnée (10; 20) de manière à tourner autour d'un axe de rotation (z); un premier mandrin (16; 22) conçu pour retenir une pièce 62() autour dudit axe; et un embrayage (24) comprenant un élément menant (26) et un élément mené (30), ledit élément menant pouvant être raccordé à ladite première broche pour tourner autour dudit axe, et ledit élément mené pouvant être raccordé audit embrayage et tourillonné en rotation autour dudit élément menant pour tourner autour dudit axe, et ledit élément mené pouvant être verrouillé de manière libérable par rapport audit élément menant, de telle manière que ledit embrayage présente une première configuration déverrouillée et une seconde configuration verrouillée. Un support de selle(60) présente une surface de support qui est une image inverse d'un premier côté usiné d'une pièce, pour apporter un support plus intime à la pièce pendant l'usinage du second côté.
PCT/GB2014/051320 2013-04-29 2014-04-29 Machine rotative de fraisage WO2014177851A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14719848.5A EP2991793A1 (fr) 2013-04-29 2014-04-29 Machine rotative de fraisage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1307691.4 2013-04-29
GB1307691.4A GB2513843A (en) 2013-04-29 2013-04-29 Mill turn machine

Publications (1)

Publication Number Publication Date
WO2014177851A1 true WO2014177851A1 (fr) 2014-11-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2014/051320 WO2014177851A1 (fr) 2013-04-29 2014-04-29 Machine rotative de fraisage

Country Status (4)

Country Link
EP (1) EP2991793A1 (fr)
GB (1) GB2513843A (fr)
TW (1) TW201501854A (fr)
WO (1) WO2014177851A1 (fr)

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CN110449936A (zh) * 2019-07-26 2019-11-15 江苏摩多利传动机械制造有限公司 一种行星减速机输出轴开窗工序的夹紧防护装置
CN111152050A (zh) * 2020-02-17 2020-05-15 北京发那科机电有限公司 一种夹持系统
CN112975486A (zh) * 2021-02-05 2021-06-18 朗雄(广州)装饰材料有限公司 一种卧式数控机床

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CN109366238A (zh) * 2018-12-18 2019-02-22 常州机电职业技术学院 盘状工件的车加工方法及其工装
CN112935875A (zh) * 2021-03-12 2021-06-11 四川明日宇航工业有限责任公司 一种薄壁结构件装夹工装及加工方法
CN114952337B (zh) * 2022-05-26 2024-01-30 中国机械总院集团北京机电研究所有限公司 一种工装夹具套装以及工件加工方法
CN116038001B (zh) * 2023-03-31 2023-09-22 江苏金也汽车配件有限公司 一种汽车转向中间轴节叉铣槽装置

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CN111152050B (zh) * 2020-02-17 2023-08-25 北京发那科机电有限公司 一种夹持系统
CN112975486A (zh) * 2021-02-05 2021-06-18 朗雄(广州)装饰材料有限公司 一种卧式数控机床

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