Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
  • B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution
  • B24B39/045—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution the working tool being composed of a plurality of working rolls or balls

Definitions

• the invention relates to the field of roller milling, for example cylindrical bearing surfaces of crankshafts.
• the invention relates in particular to a device for testing roller burnishing tools.
• the burnishing machines allow the realization of the leaves on each side of a cylindrical bearing of a crankshaft.
• Each cylindrical seat of a crankshaft is pressed on the one hand between two rollers and on the other hand between two support wheels, arranged opposite the rollers.
• the axis of rotation of the rollers is inclined relative to the axis of rotation of the crankshaft, the rollers bearing on each side of the cylindrical bearing surface of a crankshaft.
• the pressure exerted by the rollers allows the burnishing of the leaves on each side of a cylindrical bearing surface of a crankshaft.
• a support wheel exerts a pressing force on the rollers which are held in place by a cage.
• the rollers roll on both the crankshaft bearing and the support wheel, when the crankshaft is rotated.
• the rotation of the crankshaft is carried out by the roller burnishing machine which comprises means for holding and driving the crankshaft.
• a technical problem concerns the realization of tests on burnishing tools. In order to guarantee a longer and more stable lifetime, life tests are necessary. Similarly, any modifications made to the roller burnishing tools require at least one validation before these tools are used in a machining line.
• the tests carried out on the burnishing tools require that a preliminary validation stage be carried out in a production line. The layout of the production line must therefore be modified, which is penalizing in terms of productivity.
• the implementation of the tests requires a reconfiguration of the production chain which is very long to implement, especially since several different tests are often necessary. On the other hand the tests are carried out on crankshafts which are lost for sale.
• crankshafts lost is all the more important as the crankshafts degrade much faster than the burnishing tools and several crankshafts are needed to test the complete wear of a set of burnishing tools. These tests roller burners are doubly penalizing for productivity.
• the object of the present invention is to overcome several drawbacks of the prior art by creating a test device for crankshaft burnishing tools making it possible to carry out the test without using a crankshaft, the test being performed independently of the machining line.
• a device for testing roller burnishing tools for a roller rolling machine having at least one cylindrical bearing surface, the machine comprising at least one roller intended to roll over a zone to be rolled out of the cylindrical bearing surface, a roller wheel. pressing bearing on said roller and two support wheels for supporting the cylindrical bearing opposite said roller characterized in that it comprises at least:
• roller bearing path associated with said roller and coming against said roller, the roller bearing path being of symmetry of revolution about the axis of rotation of the device, with a profile comprising a rounding
• the associated machine is intended for the rolling of a crankshaft having a determined number of cylindrical bearing surfaces
• the device comprises a cylindrical raceway for each pair of support wheels and a roller raceway associated with each roller of the machine.
• the device comprises a main shaft supporting bearing rings for the rollers each comprising at least one of the roller bearing tracks, the main shaft supporting bearing rings for the support wheels, each forming a raceway.
• the main shaft comprises a positioning shoulder of a bearing ring abutting against the shoulder.
• the bearing rings comprise an axial groove enabling them to be connected to a key for reinforcing the holding in rotation, arranged in a groove of the main shaft.
• the bearing rings for the rollers are each made by a bearing wheel identical to that (s) of the roller burnishing machine.
• the holding and driving means in the roller burnishing machine comprise:
• a bore disposed at a first end of the main shaft symmetrically to the axis of rotation of the test device, intended to receive a first driving tip
• a threaded hole disposed at a second end of the main shaft arranged symmetrically about the axis of rotation of the test device, intended to receive a threaded rod of a driving device
• the drive device comprising, on the side opposite to the threaded rod, a bore coaxial with the axis of rotation of the test device, intended to receive a second driving tip.
• FIG. 1 represents a sectional view of an example of a test device according to the invention on which burnishing tools are based;
• Figure 2 shows a partial sectional view of an example of bearing rings according to the invention;
• 3 shows a partial sectional view of an exemplary bearing rings according to the invention.
• the device (1) for testing is shown in Figure 1, bearing on rollers (2) and on wheels (4) support.
• a single support wheel (4) per cylindrical bearing surface is shown, but the roller burnishing machines generally comprise a support housing having two support wheels per cylindrical bearing.
• the support wheels (4) are rotatably connected to the rolling machine, about their axis (43).
• the rollers (2) are held in place by a not shown cage.
• Support wheels (3) exert a pressing force against the rollers (2).
• the bearing wheels (3) are rotatably connected to the rolling machine, about their axis (31).
• the test device (1) according to the invention is rotated, according to its axis (10) of rotation, by the rolling machine, for example according to an advanced system and counter tip.
• the test device (1) comprises for example a housing (51) disposed symmetrically about the axis (10) of rotation, to receive a support tip.
• a drive device (5) is for example screwed by a threaded rod (54) in a housing (52) threaded with the test device (1), arranged around its axis (10) of rotation.
• the drive device (5) for example receives a drive spike in a housing (53) arranged around the axis (10) of rotation of the test device (1).
• the ends of the shaft are threaded to be fixed to the roller burnishing machine.
• the test device (1) comprises roller bearing paths (22) made symmetrically with respect to the axis (10) of rotation of the device
• roller bearing tracks (22) (2) have determined positions corresponding to those of the connecting fillet made on a crankshaft, in the rolling machine, these positions being marked relative to a plane perpendicular to the axis (10) of rotation of the device (1) test.
• the roller bearing paths (22) (2) comprise a rounded profile to accommodate the rollers (2).
• the rounded profile of roller bearing tracks (22) (2) appears in particular in each of FIGS. 1, 2 and 3.
• the material in which the bearing rings (20, 21) are formed on which the paths are made ( 22) roller bearing (2), is of identical hardness to that of the material used to make the wheels (3) bearing of the roller burnishing machine.
• the diameter (D22) of the roller bearing paths (22) is chosen to be identical to the diameter of the cylindrical bearing surface machined in the machine.
• the advantage over the use of a crankshaft to perform a test of the rollers (2) is that the roller bearing paths (22) according to the invention are not intended to be deformed by the rollers (2). ).
• the rollers (2) undergoing pressure similar to the pressure in the machining conditions, the wear of the rollers (2) or the wheel (3) bearing will be identical.
• a roller bearing path (22) will allow the complete wear test of at least one set of rollers (2) associated with a bearing wheel (3).
• the roller burnishing machine drives the test device (1) according to the invention, until a roller (2) or the support wheel (3) or the ring (20) of rolling for the pebbles breaks.
• the bearing rings (20, 40) are easily removable and are, for example, replaced before the start of a test.
• the test device (1) comprises bearing tracks (42) for the support wheels (4). These bearing paths (42) bear on the wheels (4) for supporting the rolling machine.
• the bearing paths (42) for the support wheels (4) have predetermined positions, corresponding to those of the cylindrical bearings of the crankshaft machined in the rolling machine, these positions being marked relative to a plane perpendicular to the axis (10). ) of rotation of the test device (1).
• the bearing tracks (42) for the support wheels (4) have a cylindrical shape of which the axis of symmetry corresponds to the axis (10) of rotation of the device (1) test.
• the profile of the rolling paths (42) for the support wheels (4) in a section along a plane passing through the axis (10) of rotation of the device (1) is therefore a straight profile. This profile appears in particular in each of Figures 1, 2 and 3.
• the device (1) for testing comprises means for fixing and driving by the rolling machine, identical to those of a crankshaft or adapting to any type of roller burnishing machine.
• the test device (1) comprises rolling paths (22, 42) positioned in front of the burnishing tools, which enables the test device (1) according to the invention to be positioned in any type of machine.
• roller burnishing for testing the machine. Tools and roller burnishing machines are described, for example, in the following documents:
• US Pat. No. 6,253,590 describes, for example, different embodiments of a roller burnishing tool, comprising an upper part supporting the rollers in a cage and a lower part comprising two support wheels of the cylindrical bearing surface to be machined;
• WO 2005/063438 describes, for example, a roller burnishing machine comprising two arms arranged on either side of the crankshaft bearing and an axial guide wheel to prevent a collision between the roller tools and crankshaft elements;
• test device (1) according to the invention therefore makes it possible to carry out tests of numerous configurations, independently of the production line. Test configurations are not fixed. The realization of numerous and varied tests is thus facilitated. Modifications for improvements to the testing tools are therefore facilitated. The improvement of the test tools concerns, for example, the guarantee of a longer and more stable life of the burnishing tools.
• the test device (1) according to the invention can be realized with simple and inexpensive elements and the test device (1) is manufactured and then mounted in a rolling machine, regardless of the crankshaft production line. The tests are for example performed on a machine annex, outside the production line of crankshafts.
• test device no crankshaft is necessary for example to test the service life or the wear speed of the burnishing tools.
• a complete test requires a single test device (1) according to the invention.
• the lubrication is carried out in the same way as for the burnishing of a crankshaft. Since the dimensions of the test device (1) according to the invention are close to those of a crankshaft, the conditions for the tests are identical to the conditions in which the rolling of a crankshaft is carried out.
• test device (1) is adapted to a roller burnishing tool of a crankshaft having one or more cylindrical bearing surfaces, for which the rolling tools of a cylindrical bearing surface, are tested simultaneously or successively.
• a main shaft (6) of axis of revolution identical to the axis (10) of rotation of the test device (1) is extended by two threaded ends (61) or is connected to inserts comprising threaded ends.
• the main shaft has a diameter (D2) greater than the diameter (D1) of its ends (61).
• the diameter of the threaded parts fits with tightening nuts (7, 8, 9).
• a flange (62) or a shoulder is arranged on the main shaft (6).
• Bearing rings (20, 40) are arranged on the main shaft (6).
• the rings (20, 40) are tightly mounted on the main shaft (6).
• the bearing rings (20, 40) bear against the shoulder (62).
• the shoulder (62) allows axial support of the bearing rings (20, 40).
• the rolling elements (20, 40) are thus secured to the main shaft (6).
• the shoulder is made at the end of the shaft or by the collar.
• a nut (7) clamps the bearing rings (20, 40) on one side of the main shaft (6) and a double nut (8, 9). effecting the tightening of the bearing rings (20, 40) on the other side of the shaft (6).
• the bearing rings (20) for the rollers (2) are non-limitingly symmetrical to facilitate their manufacture.
• this ring (20) of rolling serves both for a roller on the right than for a roller on the left, or for two rollers.
• bearing rings (20) for the rollers (2) are formed by bearing wheels (3) of the rolling machine and the bearing rings (40) for the support wheels (4) are produced by spacers whose outer diameter is less than or equal to the lateral outer diameter of the wheels
• This embodiment has the advantage of using already existing parts, which allows an embodiment of the device (1) for testing according to the instant invention, not requiring the machining of new parts, with the exception of main shaft (6).
• the bearing ring (20) for the rollers (2) which is a support wheel, will therefore have a wear speed that is almost identical to the bearing wheel (3) of the machine. burnishing. A test of life of the burnishing tools ends for example, by peeling a roller (2) or a wheel (3) support.
• this embodiment in which bearing wheels (3) are used as rolling elements for the rollers (2) makes it possible to ensure compatibility with the rolling machine, concerning the hardness and the size of the elements (20). ).
• the bearing rings (20, 40) are held integral in rotation with the main shaft (6) by a key (1 1).
• the main shaft (6) is associated with one or more keys (1 1).
• the keys are used, without limitation, for a shaft supporting a large number of rolling devices.
• the bearing rings (21) for the rollers (2) comprise only a rolling track roller (2).
• a positioning spacer (12) is combined with the bearing rings (41, 21) to adjust the position of the rolling paths (22, 42).
• the bearing path (42) for the support wheels (4) is situated at the same height as the lower part of the race (22) for the rollers ( 2).
• the bearing ring (21) comprises a diameter (D22) identical to the diameter (D42) of the bearing ring (41) for the support wheels (4).
• the test device (1) shown in FIG. 1, is adapted to the roller burnishing machine and makes it possible to test the burnishing simultaneously of a plurality of cylindrical bearing surfaces, but the test device (1) according to the invention is also suitable for testing roller tools for a single cylindrical crankshaft bearing.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Rolling Contact Bearings (AREA)
• Testing Of Engines (AREA)
• Fats And Perfumes (AREA)
• Feed For Specific Animals (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=37569651

Family Applications (1)

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• 2006
  • 2006-04-21 FR FR0603550A patent/FR2900079B1/fr not_active Expired - Fee Related
• 2007
  • 2007-04-20 EP EP07731917A patent/EP2010359B1/de not_active Not-in-force
  • 2007-04-20 CN CN2007800142547A patent/CN101489723B/zh not_active Expired - Fee Related
  • 2007-04-20 AT AT07731917T patent/ATE448050T1/de not_active IP Right Cessation
  • 2007-04-20 RU RU2008145872/02A patent/RU2431557C2/ru not_active IP Right Cessation
  • 2007-04-20 DE DE602007003209T patent/DE602007003209D1/de active Active
  • 2007-04-20 ES ES07731917T patent/ES2335621T3/es active Active
  • 2007-04-20 WO PCT/FR2007/051142 patent/WO2007122348A1/fr not_active Ceased
  • 2007-04-20 JP JP2009505944A patent/JP2009534642A/ja not_active Ceased
  • 2007-04-20 US US12/297,446 patent/US8074526B2/en not_active Expired - Fee Related
  • 2007-04-20 BR BRPI0710561-4A patent/BRPI0710561A2/pt not_active IP Right Cessation

Non-Patent Citations (1)

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