GB2196892A - Fixing components on shafts - Google Patents

Fixing components on shafts Download PDF

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Publication number
GB2196892A
GB2196892A GB08624332A GB8624332A GB2196892A GB 2196892 A GB2196892 A GB 2196892A GB 08624332 A GB08624332 A GB 08624332A GB 8624332 A GB8624332 A GB 8624332A GB 2196892 A GB2196892 A GB 2196892A
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GB
United Kingdom
Prior art keywords
components
component
shaft
flywheel
drive
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.)
Granted
Application number
GB08624332A
Other versions
GB2196892B (en
GB8624332D0 (en
Inventor
Robin Edward Child
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.)
Concentric Pumps Ltd
Original Assignee
Concentric Pumps Ltd
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 Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Priority to GB8624332A priority Critical patent/GB2196892B/en
Publication of GB8624332D0 publication Critical patent/GB8624332D0/en
Publication of GB2196892A publication Critical patent/GB2196892A/en
Application granted granted Critical
Publication of GB2196892B publication Critical patent/GB2196892B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

A pump rotor is fixed on its shaft by spin welding using apparatus as shown in the drawing. The shaft is spun up to speed and then displaced axially to engage the shaft in the bore of the rotor which is held stationary. When the shaft "seizes" to the rotor, the torque limit coupling disengages the drive.

Description

SPECIFICATION Fixing components on shafts This invention relates to the fixing of components on shafts, particularly but not exclusively, rotors on drive shafts in gerotor pumps.
According to the invention a method of fixing components together comprises the steps of providing a bore in one of the components to receive the other component as an interference fit therein, causing relative rotation of the two components by a drive means and a holding means via a disengagable coupling, pressing the two components together during said rotation to engage one component in the bore of the other, and so spin-weld the parts together, and disengaging one of the drive and holding means when the components seize together.
Thus, one of the components provided with the bore, which may be a pump rotor, is to be held stationary while the other component which is the shaft, is spun up to speed, and pressed into the bore. When the parts seize together, the means holding the rotor stationary can be disengaged to allow the two to turn together. Alternatively, the means driving the shaft can be disengaged to allow the shaft to stop.
Preferably, an electric motor is used via a clutch to drive a high inertia flywheel which in turn drives a workholder carrying the component which is to be rotated via a torque limit "drop out" coupling. The preferred sequence of operations then is to engage the clutch, spin the flywheel coupling and workholder, with the engaged workpiece, up to speed, disengage the clutch, and press the components together allowing the torque limit coupling to drop out when the spin welding operation is complete.
One presently preferred embodiment of the invention is more particularly described with reference to the accompanying diagrammatic drawing which shows the drive motor having its shaft connected in line via an electromagnetic clutch to the flywheel, with a belt drive to a parallel shaft including the torque coupling, and carrying the workholder. The stationary component shown as a rotor to be assembled is mounted on a sliding workholder arranged for axial movement towards and away from the shaft which is to be assembled, for example being displaced by a pneumatic or hydraulic cylinder.
The operation of the layout shown may be automated and controlled with feed of components and shafts to the workholders effected automatically. It can also be arranged that when the drive motor and flywheel reach the required speed the clutch disengages automatically, and at the same time the actuating cylinder presses the components together.
The extent of interference between the shaft and bore depend to some extent upon the surface finish of the two, because the spin welding is dependent upon localised heat buildup as a result of friction. However a light press fit has been found satisfactory experimentally. Both shaft and rotor or other component can be finished before assembly by the method of the invention and it is a simple matter to provide accurate alignment so as to give correct positioning and squareness in the fixing operation.
-1. A method of fixing two components together comprising the steps of providing a bore in one of the components to receive the other component as an interference fit therein, causing relative rotation of the two components by a drive means and a holding means via a disengagable coupling, pressing the two components together during said relative rotation to engage the one component in the bore of the other, and disengaging one of the drive and holding means when the components seize together.
2. A method as claimed in Claim 1 wherein the drive means comprise an electric motor coupled to a flywheel via a clutch, and the motor is declutched from the flywheel when the latter reaches a predetermined speed.
3. A method as claimed in Claim 2 wherein the flywheel is connected to one component via a torque limit coupling which disengages the flywheel from the rotating component when the components seize together.
4. A method as claimed in Claim 2 wherein the means holding the one component stationary are released when the components seize together.
5. A method of fixing two components together by spin welding substantially as described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Fixing components on shafts This invention relates to the fixing of components on shafts, particularly but not exclusively, rotors on drive shafts in gerotor pumps.
    According to the invention a method of fixing components together comprises the steps of providing a bore in one of the components to receive the other component as an interference fit therein, causing relative rotation of the two components by a drive means and a holding means via a disengagable coupling, pressing the two components together during said rotation to engage one component in the bore of the other, and so spin-weld the parts together, and disengaging one of the drive and holding means when the components seize together.
    Thus, one of the components provided with the bore, which may be a pump rotor, is to be held stationary while the other component which is the shaft, is spun up to speed, and pressed into the bore. When the parts seize together, the means holding the rotor stationary can be disengaged to allow the two to turn together. Alternatively, the means driving the shaft can be disengaged to allow the shaft to stop.
    Preferably, an electric motor is used via a clutch to drive a high inertia flywheel which in turn drives a workholder carrying the component which is to be rotated via a torque limit "drop out" coupling. The preferred sequence of operations then is to engage the clutch, spin the flywheel coupling and workholder, with the engaged workpiece, up to speed, disengage the clutch, and press the components together allowing the torque limit coupling to drop out when the spin welding operation is complete.
    One presently preferred embodiment of the invention is more particularly described with reference to the accompanying diagrammatic drawing which shows the drive motor having its shaft connected in line via an electromagnetic clutch to the flywheel, with a belt drive to a parallel shaft including the torque coupling, and carrying the workholder. The stationary component shown as a rotor to be assembled is mounted on a sliding workholder arranged for axial movement towards and away from the shaft which is to be assembled, for example being displaced by a pneumatic or hydraulic cylinder.
    The operation of the layout shown may be automated and controlled with feed of components and shafts to the workholders effected automatically. It can also be arranged that when the drive motor and flywheel reach the required speed the clutch disengages automatically, and at the same time the actuating cylinder presses the components together.
    The extent of interference between the shaft and bore depend to some extent upon the surface finish of the two, because the spin welding is dependent upon localised heat buildup as a result of friction. However a light press fit has been found satisfactory experimentally. Both shaft and rotor or other component can be finished before assembly by the method of the invention and it is a simple matter to provide accurate alignment so as to give correct positioning and squareness in the fixing operation.
    -1. A method of fixing two components together comprising the steps of providing a bore in one of the components to receive the other component as an interference fit therein, causing relative rotation of the two components by a drive means and a holding means via a disengagable coupling, pressing the two components together during said relative rotation to engage the one component in the bore of the other, and disengaging one of the drive and holding means when the components seize together.
  2. 2. A method as claimed in Claim 1 wherein the drive means comprise an electric motor coupled to a flywheel via a clutch, and the motor is declutched from the flywheel when the latter reaches a predetermined speed.
  3. 3. A method as claimed in Claim 2 wherein the flywheel is connected to one component via a torque limit coupling which disengages the flywheel from the rotating component when the components seize together.
  4. 4. A method as claimed in Claim 2 wherein the means holding the one component stationary are released when the components seize together.
  5. 5. A method of fixing two components together by spin welding substantially as described with reference to the accompanying drawing.
GB8624332A 1986-11-05 1986-11-05 Fixing components on shafts Expired - Fee Related GB2196892B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8624332A GB2196892B (en) 1986-11-05 1986-11-05 Fixing components on shafts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8624332A GB2196892B (en) 1986-11-05 1986-11-05 Fixing components on shafts

Publications (3)

Publication Number Publication Date
GB8624332D0 GB8624332D0 (en) 1986-11-12
GB2196892A true GB2196892A (en) 1988-05-11
GB2196892B GB2196892B (en) 1990-01-17

Family

ID=10605546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8624332A Expired - Fee Related GB2196892B (en) 1986-11-05 1986-11-05 Fixing components on shafts

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GB (1) GB2196892B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140274552A1 (en) * 2013-03-14 2014-09-18 Dana Limited Cvt variator ball and method of construction thereof
US9541179B2 (en) 2012-02-15 2017-01-10 Dana Limited Transmission and driveline having a tilting ball variator continuously variable transmission
US9551404B2 (en) 2013-03-14 2017-01-24 Dana Limited Continuously variable transmission and an infinitely variable transmission variator drive
US9556943B2 (en) 2012-09-07 2017-01-31 Dana Limited IVT based on a ball-type CVP including powersplit paths
US9556941B2 (en) 2012-09-06 2017-01-31 Dana Limited Transmission having a continuously or infinitely variable variator drive
US9599204B2 (en) 2012-09-07 2017-03-21 Dana Limited Ball type CVT with output coupled powerpaths
US9638301B2 (en) 2013-03-14 2017-05-02 Dana Limited Ball type continuously variable transmission
US9638296B2 (en) 2012-09-07 2017-05-02 Dana Limited Ball type CVT including a direct drive mode
US9644530B2 (en) 2013-02-08 2017-05-09 Dana Limited Internal combustion engine coupled turbocharger with an infinitely variable transmission
US9689477B2 (en) 2012-09-07 2017-06-27 Dana Limited Ball type continuously variable transmission/infinitely variable transmission
US9777815B2 (en) 2013-06-06 2017-10-03 Dana Limited 3-mode front wheel drive and rear wheel drive continuously variable planetary transmission
US10030594B2 (en) 2015-09-18 2018-07-24 Dana Limited Abuse mode torque limiting control method for a ball-type continuously variable transmission
US10030751B2 (en) 2013-11-18 2018-07-24 Dana Limited Infinite variable transmission with planetary gear set
US10030748B2 (en) 2012-11-17 2018-07-24 Dana Limited Continuously variable transmission
US10088022B2 (en) 2013-11-18 2018-10-02 Dana Limited Torque peak detection and control mechanism for a CVP

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051495A (en) * 1900-01-01
GB963693A (en) * 1959-08-12 1964-07-15 American Mach & Foundry Improvements in or relating to friction welding
GB1127375A (en) * 1966-01-19 1968-09-18 Ford Motor Co Friction welding method
GB1277579A (en) * 1968-07-15 1972-06-14 Wellworthy Ltd Pistons
GB1398714A (en) * 1971-07-29 1975-06-25 Carves Simon Ltd Forming anchoring means on stranded prestressing calbes
EP0086740A2 (en) * 1982-02-15 1983-08-24 Schweizerische Aluminium Ag Vehicle wheel for air- or gas-filled tyres as well as method of its manufacture
US4542843A (en) * 1984-04-27 1985-09-24 Gte Laboratories Incorporated Method of friction welding a lamp feedthrough assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051495A (en) * 1900-01-01
GB963693A (en) * 1959-08-12 1964-07-15 American Mach & Foundry Improvements in or relating to friction welding
GB1127375A (en) * 1966-01-19 1968-09-18 Ford Motor Co Friction welding method
GB1277579A (en) * 1968-07-15 1972-06-14 Wellworthy Ltd Pistons
GB1398714A (en) * 1971-07-29 1975-06-25 Carves Simon Ltd Forming anchoring means on stranded prestressing calbes
EP0086740A2 (en) * 1982-02-15 1983-08-24 Schweizerische Aluminium Ag Vehicle wheel for air- or gas-filled tyres as well as method of its manufacture
US4542843A (en) * 1984-04-27 1985-09-24 Gte Laboratories Incorporated Method of friction welding a lamp feedthrough assembly

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9541179B2 (en) 2012-02-15 2017-01-10 Dana Limited Transmission and driveline having a tilting ball variator continuously variable transmission
US9556941B2 (en) 2012-09-06 2017-01-31 Dana Limited Transmission having a continuously or infinitely variable variator drive
US9689477B2 (en) 2012-09-07 2017-06-27 Dana Limited Ball type continuously variable transmission/infinitely variable transmission
US10088026B2 (en) 2012-09-07 2018-10-02 Dana Limited Ball type CVT with output coupled powerpaths
US9556943B2 (en) 2012-09-07 2017-01-31 Dana Limited IVT based on a ball-type CVP including powersplit paths
US9599204B2 (en) 2012-09-07 2017-03-21 Dana Limited Ball type CVT with output coupled powerpaths
US9638296B2 (en) 2012-09-07 2017-05-02 Dana Limited Ball type CVT including a direct drive mode
US10006527B2 (en) 2012-09-07 2018-06-26 Dana Limited Ball type continuously variable transmission/infinitely variable transmission
US10030748B2 (en) 2012-11-17 2018-07-24 Dana Limited Continuously variable transmission
US9644530B2 (en) 2013-02-08 2017-05-09 Dana Limited Internal combustion engine coupled turbocharger with an infinitely variable transmission
US9689482B2 (en) 2013-03-14 2017-06-27 Dana Limited Ball type continuously variable transmission
US9933054B2 (en) 2013-03-14 2018-04-03 Dana Limited Continuously variable transmission and an infinitely variable transmission variator drive
US20140274552A1 (en) * 2013-03-14 2014-09-18 Dana Limited Cvt variator ball and method of construction thereof
US9638301B2 (en) 2013-03-14 2017-05-02 Dana Limited Ball type continuously variable transmission
US9551404B2 (en) 2013-03-14 2017-01-24 Dana Limited Continuously variable transmission and an infinitely variable transmission variator drive
US9777815B2 (en) 2013-06-06 2017-10-03 Dana Limited 3-mode front wheel drive and rear wheel drive continuously variable planetary transmission
US10030751B2 (en) 2013-11-18 2018-07-24 Dana Limited Infinite variable transmission with planetary gear set
US10088022B2 (en) 2013-11-18 2018-10-02 Dana Limited Torque peak detection and control mechanism for a CVP
US10030594B2 (en) 2015-09-18 2018-07-24 Dana Limited Abuse mode torque limiting control method for a ball-type continuously variable transmission

Also Published As

Publication number Publication date
GB2196892B (en) 1990-01-17
GB8624332D0 (en) 1986-11-12

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20011105