WO2012008356A1 - センターレス研削盤 - Google Patents

センターレス研削盤 Download PDF

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Publication number
WO2012008356A1
WO2012008356A1 PCT/JP2011/065594 JP2011065594W WO2012008356A1 WO 2012008356 A1 WO2012008356 A1 WO 2012008356A1 JP 2011065594 W JP2011065594 W JP 2011065594W WO 2012008356 A1 WO2012008356 A1 WO 2012008356A1
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WO
WIPO (PCT)
Prior art keywords
wheel
workpiece
slide mechanism
axis
grinding machine
Prior art date
Application number
PCT/JP2011/065594
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English (en)
French (fr)
Japanese (ja)
Inventor
強志 八木
小野　浩二
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Ntn株式会社
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Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Priority to EP11806686.9A priority Critical patent/EP2594363B1/en
Publication of WO2012008356A1 publication Critical patent/WO2012008356A1/ja

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    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
    • B24B5/30—Regulating-wheels; Equipment therefor
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/02—Frames; Beds; Carriages
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies

Definitions

  • the present invention relates to a centerless grinder.
  • the workpiece center height H and the center height angle ⁇ are one of the conditions that greatly affect the machining accuracy.
  • the blade 3 is disposed between the grinding wheel 1 and the adjustment wheel 2 that are arranged in parallel at a predetermined interval.
  • the adjusting wheel 2 that rotates at a low speed and the grinding wheel 1 that rotates at a high speed rotate in the same direction around the axis.
  • the pair of guide plates 6 shown in FIG. 5 are guide members used for so-called through-feed grinding, and the workpiece 5 is fed into or taken out of the space between the grinding wheel 1 and the adjusting wheel 2. At this time, the workpiece 5 is held from both sides by the pair of guide plates 6 to guide the movement.
  • the axis w of the workpiece (object to be ground) 5 is made higher by the height H than the line connecting the axis g of the grinding wheel 1 and the axis r of the adjustment wheel 2.
  • the position of the blade 3 is set.
  • This height H is referred to as a work center height (hereinafter referred to as “heart height H”).
  • GR center Gr a line Gr connecting the axis g of the grinding wheel 1 and the axis w of the workpiece 5 (hereinafter referred to as “GR center Gr”) and the axis w of the workpiece 5 and the axis r of the adjusting wheel 2 are connected.
  • the acute angle ⁇ formed with the line is called a heart high angle (hereinafter referred to as “heart high angle ⁇ ”) with respect to the adjustment wheel 2.
  • the angle formed by the GR center Gr with respect to the line connecting the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 is ⁇ a, and the line connecting the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 is
  • the center high angle ⁇ increases from ⁇ a and ⁇ b to ⁇ a ′ and ⁇ b ′ as shown in FIG.
  • the axis r of the adjustment wheel 2 moves from r1 to r2 in the figure
  • the heart angle ⁇ increases from ⁇ b to ⁇ b ′.
  • the heart height H that can be the heart height angle ⁇ to be set is calculated, and the blade 3 is set to a height corresponding to the heart height H. Further, as the center height H is changed, the shape of the adjustment wheel 2 needs to be trued so that the workpiece 5 and the adjustment wheel 2 come into linear contact with each other.
  • the diamond height Ht of the truing device (corresponding to the distance between the contact point between the adjustment wheel 2 and the work 5 from the GR center Gr shown in FIG. 13) must also be changed. Further, it is necessary to adjust the position of the guide plate 6 on the adjustment wheel 2 side.
  • truing is often carried out under the same truing conditions even if the outer diameter or the central angle ⁇ of the workpiece 5 changes.
  • the trajectory drawn by the work 5 also changes. If the trajectory drawn by the workpiece 5 changes, the grinding will also change. In such a case, the adjustment per grinding is performed by the swivel mechanism D.
  • This swivel mechanism D adjusts how the workpiece 5 from the grinding wheel entrance to the exit contacts the grinding wheel 1 and the adjustment wheel 2 (allowance allowance distribution). For example, as shown by an arrow d in FIG. In addition, by changing the direction of the axis r of the adjustment wheel 2 and adjusting the parallel (orientation) of the grinding wheel 1 and the adjustment wheel 2, the allowance distribution is adjusted.
  • the workpiece 5 and the adjustment wheel 2 are trued so as to be in line contact, that is, in a straight line.
  • the diamond height Ht and the truing inclination calculated by the following equations are used. It is known that it is necessary to set the angle ⁇ t and perform truing.
  • the position of the adjustment wheel 2 is controlled so that the contact position between the workpiece 5 and the adjustment wheel 2 is made to be constant throughout the grinding process.
  • a technique see, for example, Patent Document 1).
  • a grinding wheel 1 and a grinding wheel base that supports the grinding wheel 1 are arranged on a bed 10, and a swivel plate 18 and an adjustment wheel 2 are placed on the bed 10 via a horizontal slide mechanism.
  • the line connecting the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 is further inclined with respect to the horizontal direction.
  • JP 2008-149387 A paragraphs 0031 to 0032 on page 7, pages 1 and 2 on page 10)
  • the center angle ⁇ of the workpiece 5 with respect to the adjusting wheel 2 changes with respect to changes in the outer diameter of the grinding wheel 1 and the outer diameter of the adjusting wheel 2.
  • the center height H corresponding to the center angle ⁇ of the workpiece 5 to the adjustment wheel 2 to be set is calculated each time.
  • the diamond height Ht and the tilt angle ⁇ t at the time of truing of the adjusting wheel 2 to be set must be calculated according to the outer diameter of the grinding wheel 1, the outer diameter of the adjusting wheel 2, and the outer diameter of the workpiece 5.
  • This also applies to the technique described in Patent Document 1.
  • Patent Document 1 has a problem that it is not easy to set the central high angle ⁇ to an arbitrary value, as in the conventional general centerless grinding machine.
  • an object of the present invention is to simplify the setting and adjustment of the adjusting wheel 2 performed according to the outer diameter of the grinding wheel 1, the outer diameter of the adjusting wheel 2, and the outer diameter of the workpiece 5.
  • the present invention provides a table on a bed via a horizontal slide mechanism, a swivel base on the table via a ⁇ swivel slide mechanism, and a horizontal slide mechanism on the swivel base.
  • An upper slide is disposed through the upper slide, an adjustment wheel is disposed on the upper slide, a grinding wheel parallel to the adjustment wheel is disposed on the bed, and a work is disposed between the grinding wheel and the adjustment wheel.
  • the grinding wheel has an axis that is higher than the adjustment wheel by a height difference, and a blade that supports the workpiece from below is disposed between the grinding wheel and the adjustment wheel.
  • the horizontal slide mechanism has a function of always maintaining the axis of the grinding wheel along the direction connecting the axis of the grinding wheel and the axis of the workpiece with respect to the bed.
  • the ⁇ turning slide mechanism has a function of moving the adjusting wheel in accordance with the workpiece by moving the rotating wheel around the center of rotation parallel to the axis of the adjusting wheel.
  • the lateral slide mechanism has a function of adjusting the center height angle of the adjustment wheel with respect to the workpiece, and the shaft center of the workpiece with respect to the table at the arbitrary center height angle in the ⁇ turning slide mechanism.
  • the centerless grinding machine has a function of moving relative to each other along a direction connecting the axis of the adjusting wheel and the axis of the adjusting wheel.
  • the center angle can be adjusted to an arbitrary value. For this reason, the optimal center angle can be easily set according to the shape of the workpiece and the processing conditions. If the center angle can be set easily, the processing accuracy can be stabilized. It is said that the heart angle is generally optimum around 7 °, but the optimum heart angle varies depending on the machining process and workpiece shape, and thus the heart angle is set to an arbitrary value. It is effective to be able to adjust.
  • the adjustment of the central angle is performed by adjusting the blade height, and at that time, the central height corresponding to the central angle to be set is calculated, It was necessary to set the blade height based on the center height.
  • the height of the axial center of the work is always set to be constant, and the central angle is determined only by the inclination of the adjusting wheel based on the ⁇ -turning slide mechanism.
  • the blade height adjustment and the conversion work for calculating the height are not required.
  • the heart angle can be determined by the movement of the ⁇ turning slide mechanism, it is not necessary to adjust the blade height for adjusting the heart angle. That is, it is not necessary to adjust the blade height accompanying the change in the center angle.
  • the movement of the adjusting wheel and the movement of the blade can be made common except during the operation by the lateral slide mechanism.
  • the blade is arranged on the swivel base, the blade rotates around the rotation center together with the adjustment wheel by the ⁇ turning slide mechanism, and is relative to the adjustment wheel by the horizontal slide mechanism. It is configured to move.
  • the center angle of the workpiece can be easily adjusted, for example, the horizontal slide mechanism, the ⁇ turning slide mechanism, and the lateral slide mechanism can be adjusted to the outer diameter of the grinding wheel and the outer diameter of the adjusting wheel. Regardless, a configuration having a function of keeping the center angle of the workpiece relative to the adjustment wheel constant can be adopted. If the central angle is made constant with respect to the change in diameter due to wear of the grinding wheel and adjusting wheel during grinding, continuous and stable machining is possible.
  • the setting to keep the heart angle constant by the horizontal slide mechanism, the ⁇ turning slide mechanism, and the lateral slide mechanism is based on the numerical value indicating the heart angle obtained by a known measurement mechanism, for example.
  • the horizontal slide mechanism, the ⁇ turning slide mechanism, and the lateral slide mechanism can be manually operated each time so as to increase or decrease the high angle.
  • the numerical values indicating the outer diameter of the grinding wheel, the outer diameter of the adjusting wheel, the outer diameter of the workpiece and the center angle obtained by a well-known inspection mechanism are automatically detected, and the detected numerical values are changed. Based on this, the operation of the horizontal slide mechanism, the ⁇ turning slide mechanism, and the lateral slide mechanism may be automatically controlled by the control mechanism so as to keep the heart angle constant, so that the heart angle can be increased or decreased.
  • the horizontal slide mechanism, the ⁇ turning slide mechanism, and the lateral slide mechanism are configured such that an outer diameter of the grinding wheel or an outer diameter of the adjusting wheel is set. Regardless, a configuration having a function of making the contact point between the grinding wheel and the workpiece and the contact point between the adjusting wheel and the workpiece constant can be adopted.
  • the horizontal slide mechanism, the ⁇ -turn slide mechanism, and the horizontal slide mechanism are independent of the outer diameter of the workpiece. It is possible to adopt a configuration having a function of making the contact point between the workpiece and the workpiece constant.
  • the grinding wheel is changed.
  • the position of the contact point with respect to the workpiece relative position of the contact point with respect to the frame that supports the grinding wheel
  • the position of the contact point with respect to the workpiece of the adjustment wheel the relative position of the contact point with respect to the frame that supports the adjustment wheel
  • the contact position between the adjustment wheel and the workpiece can be made almost constant with respect to changes in the outer diameter and center angle of the grinding wheel and adjustment wheel. Becomes smaller. For this reason, when changing the outer diameter and center angle of the workpiece, the change per grinding is small even when the adjusting wheel is processed under the same truing conditions.
  • the position of the contact point of the grinding wheel with respect to the workpiece (even if the outer diameter of the workpiece is changed or replaced with a workpiece having a different outer diameter)
  • the relative position of the contact point with respect to the frame that supports the grinding wheel and the position of the contact point with respect to the workpiece of the adjustment wheel (the relative position of the contact point with respect to the frame that supports the adjustment wheel) are configured so as to hardly change. Is possible. In this respect as well, it is not necessary to adjust the position and orientation of the guide plate provided in the grinding wheel or adjustment wheel.
  • the contact point between the adjustment wheel and the workpiece can be made almost constant, when the adjustment wheel is truing into a shape that makes line contact with the workpiece, the diamond height during truing is constant, and the position of the truing tool used for truing is adjusted. Can be simplified.
  • the rotation center of the ⁇ turning slide mechanism is coincident with the axis of the workpiece, the calculation of the rotational movement amount can be simplified by the ⁇ turning slide mechanism. Further, if the rotation center of the ⁇ turning slide mechanism is coincident with the axis of the workpiece, the contact point between the workpiece and the adjustment wheel can be made constant with higher accuracy. For this reason, the position adjustment of the truing tool can be further simplified.
  • the ⁇ turning slide mechanism rotates around the rotation center by sliding an arc surface provided on the upper surface of the table and an arc surface provided on the lower surface of the turntable.
  • a configuration in which movement is guided can be employed. By causing the rotational movement to be guided by the surface contact between the arc surfaces, the rotational movement around the center of rotation of the adjusting wheel can draw a more reliable and stable locus.
  • the arc surface provided on the upper surface of the table is composed of two concentric arc surfaces having different radii
  • the arc surface provided on the lower surface of the swivel base includes two arc surfaces provided on the upper surface of the table. If the configuration consists of two concentric arc surfaces provided corresponding to the concentric arc surfaces, and the corresponding two concentric arc surfaces slide with each other, the trajectory of the adjustment vehicle will be more reliable and stable. It can be a natural thing.
  • the arc surface provided on the upper surface of the table and the arc surface provided on the lower surface of the swivel base are pressed in a direction in which they are in close contact with each other by the misalignment prevention preload mechanism.
  • a configuration can be adopted. Furthermore, it is desirable that the pressing is performed with elasticity by an elastic force of an elastic body such as a spring.
  • a bolt screwed into a screw hole provided in the table from the swivel base side is provided, and the bolt is rotated when the swivel base rotates. It can be set as the structure which can move the inside of the long hole provided in the turntable.
  • a swivel mechanism is provided between the table and the bed, and the swivel mechanism has a function of adjusting the orientation of the axis of the grinding wheel and the axis of the adjusting wheel.
  • the horizontal slide mechanism can adopt a configuration having the function of moving relative to each other in an arbitrary direction adjusted by the swivel mechanism.
  • the swivel mechanism By providing the swivel mechanism, it is possible to adjust how the workpiece from the grindstone entrance to the exit meets the grinding grindstone and the adjustment wheel.
  • the allowance distribution can be adjusted by adjusting the parallelism (direction) of the grinding wheel and the adjustment wheel.
  • the horizontal slide mechanism maintains the orientation of the adjusted wheel after the adjustment at an arbitrary adjustment position by the swivel mechanism (direction of the axis of the adjusting wheel with respect to the axis of the grinding wheel arranged in parallel).
  • the moving function can be exhibited.
  • the horizontal slide mechanism moves the adjustment wheel in accordance with the workpiece by moving the table relative to the bed along the direction connecting the axis of the grinding wheel and the axis of the workpiece. It has a function to make it. That is, the moving direction of the table with respect to the bed by the horizontal slide mechanism may be the horizontal direction or may be inclined with respect to the horizontal direction.
  • the ⁇ turning slide mechanism has a function of rotating the adjusting wheel around the rotation center parallel to the axis of the adjusting wheel, the outer diameter of the grinding wheel or the adjusting wheel is reduced. Adjustment can be made so that the center angle of the workpiece relative to the adjustment wheel does not change. That is, complicated adjustment of the adjusting wheel is not required for the change in diameter due to wear of the outer diameter of the grinding wheel and the outer diameter of the adjusting wheel.
  • This embodiment relates to a centerless grinding machine 17 having a cylindrical workpiece 5 such as a cylindrical roller as an object to be ground.
  • a blade 3 is disposed between a grinding wheel 1 having a circular cross section and a adjusting wheel 2 that are arranged in parallel at a predetermined interval.
  • a workpiece 5 having a circular cross section is fed into the space between the grinding wheel 1 and the adjustment wheel 2.
  • the axis g of the grinding wheel 1 and the axis w of the workpiece 5 are set to the same height. For this reason, the GR center Gr is horizontal.
  • a table 11 is disposed on a bed 10 placed on a floor surface via a horizontal slide mechanism A.
  • the table 11 is movable in the horizontal direction with respect to the bed 10.
  • the horizontal slide mechanism A moves the table 11 relative to the bed 10 in the horizontal direction when the workpiece 5 is ground, so that the outer diameter of the workpiece 5 is adjusted as indicated by an arrow a in FIG.
  • the function of moving the position of the adjusting wheel 2 closer to or away from the grinding wheel 1 is exhibited.
  • the moving direction is a direction orthogonal to the direction of the axis r of the adjusting wheel 2 in the plan view. Further, this moving direction may be a direction along the GR center Gr in the side view shown in FIG. 2 and the like, and strictly speaking, it is desirable to be parallel to the GR center Gr. In this embodiment, since the GR center Gr is horizontal, the table 11 also moves in the horizontal direction.
  • a swivel mechanism D is provided between the table 11 and the bed 10.
  • the swivel mechanism D has a function of turning the table 11 in a lateral direction with respect to the bed 10 by a swivel plate 18 (see an arrow d in FIG. 11C shown as a conventional example).
  • the direction of the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 can be finely adjusted. By fine adjustment of this direction, it is possible to adjust how the workpiece 5 from the grindstone entrance to the exit, the grinding wheel 1 and the adjusting wheel 2 come into contact (allowance allowance distribution).
  • the workpiece 5 is usually fed in order from the grindstone entrance to the exit, and is continuously ground (see also arrow e in FIG. 11C).
  • the horizontal slide mechanism A is provided above the swivel mechanism D, and an arbitrary adjustment position by the swivel mechanism D (the axis g of the grinding wheels 1 arranged in parallel and the axis r of the adjusting wheel 2). In the direction), the function of moving in the horizontal direction can be exhibited while maintaining the direction of the axis r of the adjustment wheel 2 after the adjustment.
  • the movement direction of the table 11 and the adjustment wheel 2 by the horizontal slide mechanism A is also moved to the same side by the same angle as the angle of the axis r of the adjustment wheel 2 moved by the swivel mechanism D. It is supposed to be.
  • a swivel base 13 is disposed on the table 11 via a ⁇ swivel slide mechanism B.
  • the ⁇ turning slide mechanism B has a function of rotating the turntable 13 around the rotation center s parallel to the axis r of the adjustment wheel 2 as indicated by an arrow b in FIG.
  • the axis w of the workpiece 5 and the rotation center s coincide.
  • an upper slide 12 is arranged on the swivel base 13 via a lateral slide mechanism C.
  • the lateral slide mechanism C moves the upper slide 12 with respect to the swivel base 13 in a direction connecting the axis w of the workpiece 5 and the axis r of the adjustment wheel 2. And has a function of moving relative to each other linearly.
  • the rotational movement based on the function of the ⁇ -turning slide mechanism B the inclination angle of the turntable 13 with respect to the table 11 changes, so that the operation direction of the upper slide 12 by the horizontal slide mechanism C is horizontal in accordance with the rotation movement. Or in any tilt direction and changes each time.
  • the adjusting wheel 2 moves in a direction in which the axis r thereof approaches or separates from the axis w of the workpiece 5.
  • the adjusting wheel 2 is arranged on the upper slide 12.
  • the adjusting wheel 2 is supported by the frame of the upper slide 12 so as to be rotatable about the axis r, and can be rotated by a driving force such as a motor.
  • the upper slide 12 includes a truing device 15 at an upper portion thereof.
  • a guide plate 6 on the adjustment wheel 2 side is fixed to a spindle head that supports the adjustment wheel 2.
  • Each guide plate 6 on the side of the adjusting wheel 2 on the side of the adjusting wheel 2 and on the outlet side moves together with the adjusting wheel 2 in the directions of the arrows a, b, c.
  • a grinding wheel 1 is arranged on the bed 10 so as to be parallel to the adjustment wheel 2.
  • the grinding wheel 1 is supported by the frame of the grinding wheel base 14 so as to be rotatable around the axis g, and can be rotated by a driving force such as a motor. Moreover, the position of the grinding wheel 1 can be moved in parallel in the horizontal direction by the function of the grinding wheel base 14.
  • the grinding wheel 1 is also provided with a guide plate 6 having a fixing structure (fixed to the work rest 19) similar to the guide plate 6 on the adjusting wheel 2 side.
  • the shaft center g of the grinding wheel 1 and the shaft center r of the adjusting wheel 2 are basically parallel, and a predetermined feed angle necessary for through-feed grinding is given depending on the case.
  • a predetermined height difference is provided between the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2. That is, the axis g of the grinding wheel 1 is set to be higher than the axis r of the adjusting wheel 2 by the height difference Hg.
  • the ⁇ turning slide mechanism B adjusts the center high angle ⁇ of the work 5 with respect to the adjusting wheel 2 by rotating the turning table 13 around the center of rotation s parallel to the axis r of the adjusting wheel 2. It is possible (see arrow b in FIG. 2).
  • the ⁇ turning slide mechanism B is configured such that the arc surface provided on the upper surface of the table 11 and the arc surface provided on the lower surface of the swivel base 13 slide to cause the rotation center s.
  • the surrounding rotational movement is guided.
  • the axis r ′ of the adjustment wheel 2 moves to the position r ′′.
  • the arc surface provided on the upper surface of the table 11 is composed of two concentric arc surfaces 11a and 11b having different radii.
  • the arc surface provided on the lower surface of the swivel base 13 corresponds to the two concentric arc surfaces 11a and 11b provided on the upper surface of the table 11 so as to slide while in surface contact with each other. It is comprised from two concentric circular arc surfaces 11b and 13b. These two pairs of concentric arcuate surfaces 11a, 13a; 11b, 13b slide with each other, so that the rotational movement of the swivel base 13 with respect to the table 11 is reliably guided.
  • the arc surface 11a on the side close to the rotation center s and the corresponding arc surface 13a on the swivel base 13 are pressed in a direction in which they are in close contact with each other by the misalignment prevention preload mechanism 16.
  • the displacement prevention preload mechanism 16 includes a bolt 16 b that is screwed into a screw hole 11 c provided in the table 11 from a presser member 16 c provided on the swivel base 13 side. Since the pressing member 16c includes an elastic body 16a made of a spring, the pressing member 16c presses the swivel base 13 toward the table 11 with elasticity. For this reason, the sliding of the arcuate surfaces 11a and 13a is smooth.
  • the bolt 16b can move in a long hole 13c provided in the swivel base 13 when the swivel base 13 rotates around the rotation center s. Moreover, you may provide the misalignment prevention preload mechanism which has the same function between the other circular arc surfaces 11b and 13b.
  • the ⁇ turning slide mechanism B moves the adjustment wheel 2 around the rotation center s parallel to the axis r of the adjustment wheel 2, that is, around the axis w of the workpiece 5 in this embodiment. Therefore, the center angle ⁇ of the adjustment wheel 2 with respect to the workpiece 5 can be adjusted. For this reason, it is possible to set so that the heart angle ⁇ does not change (is always constant).
  • the axis g of the grinding wheel 1 is higher than the axis r of the adjusting wheel 2 by a height Hg, and a center angle ⁇ is set with respect to the GR center Gr. ing.
  • the outer diameter of the adjustment wheel 2 has changed from the state shown by the chain line in the figure to the state shown by the solid line due to wear.
  • the upper slide 12 and the adjusting wheel 2 move from the position indicated by the axis r to the position indicated by the axis r ′ as indicated by an arrow c1 in the figure.
  • the adjustment wheel 2 and the blade 3 move together.
  • the axial center w of the workpiece 5 is always kept at a fixed position.
  • the center angle ⁇ of the workpiece 5 relative to the adjusting wheel 2 does not change. This is because the movement of the adjustment wheel 2 by the lateral slide mechanism C is parallel along the direction connecting the axis w of the workpiece 5 and the axis r of the adjustment wheel 2. That is, in the cross section shown in FIG. 3, the axis r ′ of the adjustment wheel 2 after movement is located on a straight line connecting the axis w of the workpiece 5 and the axis r of the adjustment wheel 2 before movement. The height difference between the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 decreases from Hg shown in the figure to Hg ′.
  • the center angle ⁇ of the workpiece 5 relative to the adjusting wheel 2 does not change.
  • the angle ⁇ ′ in the figure is equal to the angle ⁇ . This is because the movement of the adjustment vehicle 2 by the horizontal slide mechanism A is parallel along the GR center Gr.
  • the height difference Hg between the axis g of the grinding wheel 1 and the axis r of the adjustment wheel 2 is the same before and after the adjustment wheel 2 is moved.
  • the adjustment wheel 2 moves in the horizontal direction in the direction of the arrow a2 in the figure by the function of the horizontal slide mechanism A.
  • the adjustment wheel 2 and the blade 3 move together.
  • the axis w of the workpiece 5 is always kept at a constant height.
  • the center angle ⁇ of the workpiece 5 with respect to the adjustment wheel 2 does not change before and after the movement of the adjustment wheel 2.
  • the angle ⁇ ′ in the figure is equal to the angle ⁇ .
  • the height difference between the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 decreases from Hg to Hg ′ shown in the figure.
  • the center high angle ⁇ is constant with respect to changes in diameter due to wear of the grinding wheel 1 and the adjustment wheel 2 during grinding, continuous and stable machining is possible.
  • the axis g of the grinding wheel 1 and the axis w of the workpiece 5 are constant at the same height, that is, even if the center heights are constant, continuous and stable machining is performed. Is possible.
  • the horizontal slide mechanism A, the ⁇ turning slide mechanism B, and the lateral slide mechanism C have a constant center high angle ⁇ of the workpiece 5 with respect to the adjustment wheel 2 regardless of the outer diameter of the grinding wheel 1 and the adjustment wheel 2. If the configuration has a function of automatically operating so as to maintain the above, it is possible to eliminate the troublesome position adjustment of the adjustment vehicle 2 that has been necessary conventionally.
  • the swivel base 13 When changing the center angle ⁇ of the adjusting wheel 2 with respect to the work 5, the swivel base 13 is rotated with respect to the table 11 from the state shown by the chain line in FIG. Move. At this time, the adjusting wheel 2 and the blade 3 rotate together. As indicated by an arrow b1 in FIG. 6, this rotational movement causes the turntable 13 to rotate around the rotation center s parallel to the axis r of the adjustment wheel 2, that is, around the axis w of the workpiece 5 in this embodiment. Since the adjustment wheel 2 is rotationally moved, the central angle ⁇ can be increased or decreased by the rotational movement of the adjusting wheel 2. In FIG. 6, the heart high angle ⁇ is adjusted to the heart high angle ⁇ ′.
  • the center angle ⁇ of the workpiece 5 with respect to the adjustment wheel 2 can be easily adjusted to an arbitrary angle, the optimum center angle ⁇ can be easily set according to the shape and processing conditions of the workpiece 5 each time. .
  • the contact point between the adjustment wheel 2 and the work 5 (the relative position of the contact point with respect to the frame that supports the adjustment wheel 2) does not change. It is not necessary to adjust the position of the plate 6. This is because the guide plate 6 on the adjustment wheel 2 side is fixed to a frame that supports the adjustment wheel 2 (for example, the spindle head of the adjustment wheel 2 or the upper slide 12).
  • the rotation center of the swivel base 13 is adjusted so as to coincide with the axis w of the workpiece 5.
  • This adjustment is performed first by adjusting the height of the blade 3 indicated by the arrow f in the drawing and by moving the upper slide 12 in the direction indicated by the arrow c3 in the drawing by the lateral slide mechanism C. Make adjustments.
  • the horizontal slide mechanism A moves the table 11 in the direction indicated by the arrow a3 in the drawing. By the movement of the table 11, the positional relationship between the grinding wheel 1, the adjustment wheel 2, the work 5, and the blade 3 is adjusted.
  • the center angle ⁇ of the workpiece 5 relative to the adjustment wheel 2 does not change.
  • the angle ⁇ ′ in the figure is equal to the angle ⁇ .
  • the height difference between the axis g of the grinding wheel 1 and the axis r of the adjusting wheel 2 decreases from Hg to Hg ′ shown in the figure.
  • the horizontal slide mechanism A, the gamma turning slide mechanism B, and the lateral slide mechanism C are independent of the outer diameter of the grinding wheel 1 or the outer diameter of the adjusting wheel 2, and the contact point between the grinding wheel 1 and the workpiece 5; It has a function of making the contact point between the adjusting wheel 2 and the workpiece 5 constant. Further, the horizontal slide mechanism A, the ⁇ turning slide mechanism B, and the lateral slide mechanism C have a function of making the contact point between the adjustment wheel 2 and the work 5 constant regardless of the outer diameter of the work 5.
  • the contact point is constant means that the position of the contact point with respect to the work 5 of the adjustment wheel 2, that is, the relative position of the contact point with respect to the frame that supports the adjustment wheel 2 is constant. Means. Since the position of this contact point hardly changes, even if the grinding wheel 1 and the adjustment wheel 2 are worn, it is not necessary to adjust the position and orientation of the guide plate 6 provided on them.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
PCT/JP2011/065594 2010-07-12 2011-07-07 センターレス研削盤 WO2012008356A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11806686.9A EP2594363B1 (en) 2010-07-12 2011-07-07 Centerless grinding machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010157839A JP5612936B2 (ja) 2010-07-12 2010-07-12 センターレス研削盤
JP2010-157839 2010-07-12

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CN103991019A (zh) * 2014-05-21 2014-08-20 芜湖求精紧固件有限公司 磨床
CN106078420A (zh) * 2016-08-09 2016-11-09 无锡尊宝电动车有限公司 一种具有全方位打磨效果的电动车刹车鼓打磨装置
CN106141892A (zh) * 2016-06-30 2016-11-23 宁波安杰森精密机械制造有限公司 一种轴承套圈滚道和挡边复合超精研机
CN106863069A (zh) * 2017-04-05 2017-06-20 黄小芬 四轴磨齿机
JP2018094684A (ja) * 2016-12-14 2018-06-21 株式会社アイエイアイ ねじ軸研磨装置とねじ軸研磨方法
CN109227350A (zh) * 2018-11-15 2019-01-18 常州神力热喷涂技术有限公司 陶瓷活塞杆外圆垳磨机
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CN117161854A (zh) * 2023-09-08 2023-12-05 宁波宝鼎自动化机械科技有限公司 一种直线轴承衬套外圆磨削设备及其工作方法

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JP5725089B2 (ja) * 2013-06-11 2015-05-27 日本精工株式会社 研削盤
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CN106181761A (zh) * 2016-09-21 2016-12-07 苏州市海神达机械科技有限公司 多功能精密机械加工台面
JP2018051709A (ja) * 2016-09-30 2018-04-05 コマツＮｔｃ株式会社 工作機械のベッドおよび工作機械
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CN103991019A (zh) * 2014-05-21 2014-08-20 芜湖求精紧固件有限公司 磨床
CN106141892A (zh) * 2016-06-30 2016-11-23 宁波安杰森精密机械制造有限公司 一种轴承套圈滚道和挡边复合超精研机
CN106078420A (zh) * 2016-08-09 2016-11-09 无锡尊宝电动车有限公司 一种具有全方位打磨效果的电动车刹车鼓打磨装置
JP2018094684A (ja) * 2016-12-14 2018-06-21 株式会社アイエイアイ ねじ軸研磨装置とねじ軸研磨方法
CN106863069A (zh) * 2017-04-05 2017-06-20 黄小芬 四轴磨齿机
CN109227350A (zh) * 2018-11-15 2019-01-18 常州神力热喷涂技术有限公司 陶瓷活塞杆外圆垳磨机
CN109227350B (zh) * 2018-11-15 2023-12-19 常州神力热喷涂技术有限公司 陶瓷活塞杆外圆垳磨机
CN115716222A (zh) * 2022-11-25 2023-02-28 丽水市华洲汽车部件科技股份有限公司 一种汽车离合器面片数控双面定轨移动式磨床
CN117161854A (zh) * 2023-09-08 2023-12-05 宁波宝鼎自动化机械科技有限公司 一种直线轴承衬套外圆磨削设备及其工作方法

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