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US 4,054,082 AGranted
Broaching machines
AssigneeRatier-Forest
InventorRene P. Poincenot
Life of this patent
Estimating the term…
Abstract
An improved broaching machine comprises a device for accumulating at least part of the kinetic energy stored during the travel of the tool-carrier slide-block within the assembly constituted by the slide-block, the rotor of the electric motor and the transmission system as well as means for transferring the energy from the slide-block to the accumulation device and conversely.
Claims9
A broaching machine comprising:
- a frame provided with guideways,
- a workpiece-carrying support carried by said frame,
- a slide-block reciprocable in said guideways to achieve a cutting stroke and a return stroke and adapted to carry a broaching tool to operate upon a workpiece supported on said workpiece-carrying support, during said cutting stroke,
- an asynchronous electric motor having a stator and a rotor,
- a transmission system operatively connecting said rotor and said reciprocable slide-block,
- energy accumulating means for accumulating at least part of the kinetic energy stored in said slide-block, in said rotor and in said transmission system, during at least one of said cutting and return strokes,
- and energy transfer means for transferring said energy from said slide-block to said energy accumulating means and from said energy accumulating means to said slide-block.
4 more elements
A broaching machine comprising:
- a frame provided with guideways,
- a workpiece-carrying support carried by said frame,
- a slide-block reciprocable in said guideways to achieve a cutting stroke and a return stroke and adapted to carry a broaching tool to operate upon a workpiece supported on said workpiece-carrying support, during said cutting stroke,
- an asynchronous electric motor having a stator and a rotor,
- a transmission system operatively connecting said rotor to said reciprocable slide-block,
- energy-accumulating spring means secured to said frame for accumulating at least part of the kinetic energy stored in said slide-block, in said rotor and in said transmission system, during at least one of said cutting and return strokes, a portion of said energy accumulating spring means being located near the end of the corresponding said stroke of said slide-block for serving as energy transfer means for transferring said energy from said slide-block to said energy accumulating spring means and from said energy-accumulating spring means to said slide-block.
3 more elements
A broaching machine comprising:
- a frame provided with guideways,
- a workpiece-carrying support carried by said frame,
- a slide-block reciprocable in said guideways to achieve a cutting and a return stroke and adapted to carry a broaching tool to operate upon a workpiece supported on said workpiece-carrying support, during said cutting stroke,
- an asynchronous electric motor having a stator and a rotoe,
- a transmission system operatively connecting said rotor to said reciprocable slide-block,
- a resiliently deformable energy-accumulating element secured to said frame for accumulating at least part of the kinetic energy stored in said slide-block, in said rotor and in said transmission system, during at least one of said cutting and return strokes, a portion of said resiliently deformable energy-accumulating element being located near the end of the corresponding said stroke of said slide-block to serve as energy transfer means for transferring said energy from said slide-block to said resiliently deformable energy-accumulating element and from said resiliently deformable energy-accumulating element,
- and means pre-tensioning said resiliently deformable element.
4 more elements
A broaching machine comprising:
- a frame provided with guideways,
- a workpiece-carrying support carried by said frame,
- a slide-block reciprocable in said guideways to achieve a cutting stroke and a return stroke and adapted to carry a broaching tool to operate upon a workpiece supported on said workpiece-carrying support, during said cutting stroke,
- an asynchronous electric motor having a stator and a rotor,
- a transmission system operatively connecting said rotor to said reciprocable slide-block,
- a hydro-pneumatic accumulator containing liquid and gas under pressure for accumulating at least part of the kinetic energy stored in said slide-block, in said rotor and in said transmission system, during at least one of said cutting and return strokes,
- an energy transfer jack coupled to said hydro-pneumatic accumulator for transferring said energy from said slide-block to said hydro-pneumatic accumulator and from said hydro-pneumatic accumulator to said slide-block;
- said energy transfer jack being secured to said machine frame and having a movable member, said movable member of said energy transfer jack being located near the end of the corresponding said stroke of said slide-block,
- a non-return valve between said hydro-pneumatic accumulator and said energy transfer jack,
- and a control valve by-passing said non-return valve for controlling the flow of said liquid from said accumulator to said jack.
7 more elements
A broaching machine comprising:
- a frame provided with guideways,
- a workpiece-carrying support carried by said frame,
- a slide-block reciprocable in said guideways to achieve a cutting stroke and a return stroke and adapted to carry a broaching tool to operate upon a workpiece supported on said workpiece-carrying support, during said cutting stroke,
- an asynchronous electric motor having a stator and a rotor,
- a transmission system operatively connecting said rotor to said reciprocable slide-block, said transmission system comprising two shafts rotating in opposite directions and two clutch units respectively associated with said two shafts,
- energy accumulating means for accumulating at least part of the kinetic energy stored in said slide-block, in said rotor and in said transmission system, during at least one of said cutting and return strokes,
- and energy transfer means for transferring said energy from said slide-block to said energy accumulating means and from said energy accumulating means to said slide-block.
4 more elements
Dependencies are inferred from the claim text.