EP2544857A1 - Rectifieuse cylindrique sans centre destinée à rectifier des pièces en forme de tige et procédé de rectification cylindrique sans centre de pièces en forme de tige - Google Patents

Rectifieuse cylindrique sans centre destinée à rectifier des pièces en forme de tige et procédé de rectification cylindrique sans centre de pièces en forme de tige

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Publication number
EP2544857A1
EP2544857A1 EP11707835A EP11707835A EP2544857A1 EP 2544857 A1 EP2544857 A1 EP 2544857A1 EP 11707835 A EP11707835 A EP 11707835A EP 11707835 A EP11707835 A EP 11707835A EP 2544857 A1 EP2544857 A1 EP 2544857A1
Authority
EP
European Patent Office
Prior art keywords
grinding
workpiece
wheels
control
grinding wheels
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
EP11707835A
Other languages
German (de)
English (en)
Other versions
EP2544857B1 (fr
Inventor
Erwin Junker
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.)
Erwin Junker Grinding Technology AS
Original Assignee
Erwin Junker Grinding Technology AS
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 Erwin Junker Grinding Technology AS filed Critical Erwin Junker Grinding Technology AS
Publication of EP2544857A1 publication Critical patent/EP2544857A1/fr
Application granted granted Critical
Publication of EP2544857B1 publication Critical patent/EP2544857B1/fr
Active legal-status Critical Current
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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
    • 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
    • B24B5/22—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 for grinding cylindrical surfaces, e.g. on bolts
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
    • B24B47/206—Drives or gearings; Equipment therefor relating to feed movement for centreless grinding machines; for machines comprising work supports, e.g. steady rests
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
    • 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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/38—Single-purpose machines or devices for externally grinding travelling elongated stock, e.g. wire

Definitions

  • the invention relates to a centerless cylindrical grinding machine for grinding rod-shaped workpieces with a cylindrical outer contour in a continuous grinding process with the features a to d of claim 1 of this application.
  • the invention also relates to a method for centerless cylindrical grinding of rod-shaped workpieces having the features a to d of claim 17 of this application.
  • a cylindrical grinding machine and a method of this type are known from DE 101 00 871 C1.
  • two individual cylindrical grinding machines are combined as separate assemblies on a common foundation to form one unit.
  • the rod or tubular workpiece passes continuously through the two separate grinding units for grinding in succession.
  • each grinding unit a relatively wide cylindrical grinding wheel faces a package of regulating wheels, which are relatively thin and spaced from each other on a common spindle.
  • the grinding and regulating wheels are located together with the usual support ruler in a common axial area;
  • the two assemblies are independent in every respect.
  • the grinding geometry ie the spatial allocation of grinding wheel, regulating wheel and supporting ruler relative to the workpiece, may be different in each of the two units.
  • two grinding gaps located at an axial distance from each other are thus formed, through which the rod-shaped or tubular workpiece passes.
  • the two units of the known cylindrical grinding machine can serve different tasks; For example, in the first unit, rough grinding may be performed while finishing is done in the second unit.
  • the workpiece is in two units of the known grinding machine are arranged in the grinding gap so that it is located "under the center.” In an exact definition, this means the following: the workpiece is fixed in the radial direction in the widening grinding gap according to a reference plane, the workpiece longitudinal axis is located away from said reference plane within a portion of the grinding gap between this reference plane and the support surface of the support ruler On the other hand, it can not be ejected out of the grinding gap even when working with larger grinding forces, so when grinding "under the middle" with a ho hen zooming work volume, and the axial feed of the workpiece in the grinding path and in the grinding gap can be high.
  • the arrangement "under the center” is therefore preferred in many applications for centerless cylindrical grinding, but the limits of the arrangement arise when grinding bar or tubular workpieces having a small diameter
  • the workpiece is thus located very high in the grinding gap, so that in the worst case it can migrate upwards out of the grinding gap, or at least at the grinding gap It becomes more and more difficult to use the standard support ruler to ensure a safe and quiet position of the workpiece during grinding As the grinding gap becomes ever narrower, one finally approaches the area in which the grinding wheels would collide with one another; with a small diameter is in the convenl I can not do that anymore.
  • a manually operated special device is known to be processed on a workpiece two lateral grinding points simultaneously by centerless cylindrical grinding.
  • two grinding wheels are arranged flying on a common shaft and driven for rotation; their axial distance from each other is variable.
  • the one movably arranged grinding wheel is moved axially from the outside in the direction of the second stationary grinding wheel.
  • the two grinding wheels remain at an axial distance from each other when grinding the lateral grinding points.
  • a regulating wheel for driving the workpiece is arranged.
  • the regulating wheel and the grinding wheels are staggered because the regulating wheel is in its axial position there.
  • each of the three groups comprises a common, rotatably driven spindle, on which the discs of this group are at the mutual axial distance.
  • the three groups extend along the round rod to be ground and enclose it between them.
  • the first group consists of grinding wheels; the associated spindle runs parallel to the axis of the round rod.
  • the spindle of the second group is slightly inclined relative to the axis of the round rod;
  • the disks arranged on this spindle are guide disks with a conical edge which is covered with felt.
  • the guide discs cause the transport of the round rod in the axial direction.
  • the grinding wheels and guide discs are opposed to each other in the usual way with a radial distance, in such a way that each grinding wheel is exactly opposite a guide disc.
  • the third group of discs in the cylindrical grinding machine according to DE 478 720 A is arranged below the continuous round rod on a common spindle in such a way that these discs engage from below into the axial spaces between the grinding wheels and the guide discs and support the round rod.
  • the known machine has no support ruler. Rather, the discs of the third group act much like a support ruler; In addition, they cause the rotary drive of the round rod.
  • the well-known machine according to DE 478 720 A should allow the use of different granular grinding wheels and at the same time ensure a lively self-rotation of the workpieces with strong axial feed.
  • the invention is based on the object to improve the cylindrical grinding machine and the cylindrical grinding process of the type mentioned so that rod or tubular workpieces of small outside diameter in the grinding gap formed by the grinding wheels, the regulating wheels and the support ruler reliably stable and quiet so that a good grinding result is achieved even when grinding with a high machining volume.
  • the solution to this problem is achieved in the cylindrical grinding machine by the totality of the features of claim 1 and in the cylindrical grinding process with the entirety of the features of claim 17.
  • the control and grinding wheels in the axial direction against each other are staggered, wherein the regulating wheels protrude into the axial spaces between the grinding wheels and vice versa, the grinding wheels in the axial spaces between the regulating wheels.
  • Regulating and grinding wheels can thus no longer abut each other, and the grinding gap does not begin in the aforementioned reference plane, but away from this in an area in which the distance between the outer contours of grinding and regulating wheel increasingly increases.
  • the workpiece thus abuts two tangential contact lines extending in its longitudinal direction on the grinding and regulating wheel, these contact lines being at a greater distance from one another.
  • the person skilled in the art speaks here of a "high sub-center dimension.” As a result, the position of the workpiece in the grinding gap remains reliably stable and stable even when working with a high machining volume.
  • the cylindrical grinding machine With the cylindrical grinding machine according to the invention, it is possible to let the grinding wheel on the contacting parts run in the same direction as the workpiece or in the opposite direction to the workpiece. Regardless of the direction of rotation of the grinding wheel can be chosen so that the grinding wheel circumference moves at the point of its contact with the workpiece on the reference plane, ie in the grinding gap. This has the advantage that the workpiece is pressed more strongly against the regulating wheels during grinding and thus relieves the bearing ruler. The wear of the support ruler is thus reduced.
  • An advantageous development of the cylindrical grinding machine according to the invention consists in that the basic pattern of the multiple set comprises a row of two or more disks, one row of regulating wheels on one side of the workpiece and the other row of grinding wheels opposite on the other side of the workpiece is arranged.
  • the basic pattern of the multiple set comprises a row of two or more disks, one row of regulating wheels on one side of the workpiece and the other row of grinding wheels opposite on the other side of the workpiece is arranged.
  • the grinding and regulating wheels are driven with the same direction of rotation; the speed of the regulating wheels on the one hand and the On the other hand, grinding wheels can be set independently, as well as the mutual delivery of the discs to the workpiece.
  • the machine control it is of course also possible to tune the speeds and the feed movement of the two groups of discs controlled each other.
  • the radial feed has become superfluous when grinding over the discs, that the rod-shaped workpiece passes through groups of discs with increasing diameter, the grinding gap is getting narrower. Changing the infeed is only necessary if the grinding wheels have to be changed or if there is a change to workpieces with a different diameter than before.
  • the regulating and grinding wheels are no longer directly opposite one another in the transverse direction.
  • the staggered arrangement of the disks means that there is a risk of a slight deflection, even if the workpiece is bent. In the worst case, the result of grinding could worsen. Therefore, as a precaution, according to a further advantageous embodiment, provision is made for the lateral covering areas of the regulating and grinding disks to be separated from one another by axial gaps whose width is only so great that the regulating and grinding disks are not mutually exclusive in their continuous production operation Impair function or even touch it.
  • the correct dimensioning of the gap width results from simple operational tests; For example, a reference value for practice may be the range between 0.5 and 2 mm.
  • Another advantageous measure for avoiding bending stresses in the workpiece is that the axial width of the grinding wheels is less than the axial width of the regulating wheels.
  • the grinding wheels For the operation of the cylindrical grinding machine according to the invention, it is essential that the grinding wheels have a long service life. Only then can be ground with a high machining volume, without a subsequent correction of the delivery in grinding operation is required. Therefore, for the cylindrical grinding machine according to the invention CBN- Grinding wheels preferred whose CBN abrasive coating can be plated and ceramic or metal bonded.
  • the high load capacity of the workpieces in the present invention designed Rundschleifmaschi- ne means that control wheels made of steel can be used.
  • these should be provided on their outer circumference with a thread profile, which exerts an axial thrust in the sense of the passage direction on the workpiece similar to a screw conveyor, in which the workpiece passes through the grinding gap.
  • the outer circumference of the regulating wheel or the thread profile should advantageously be formed as a friction lining, which consists of a material other than steel, preferably from a galvanically bonded CBN layer.
  • an input support disc can be arranged with an elastic peripheral lining, which is fastened together with the regulating wheels on the regulating wheel spindle and driven by this for rotation.
  • This input support disk can compensate for a lateral deviation of the workpiece when it enters the grinding path with its front end as an unground raw rod. Even the non-circular workpiece is then safely inserted into the grinding gap.
  • an output steel support plate may be freely rotatably mounted on the grinding wheel spindle.
  • the task of the output support disk is to balance the forces acting on the rod-shaped workpiece at the exit A of the grinding path. Again, it is again about bending forces and a deflection of the workpiece to prevent its end.
  • a grinding wheel as the last disc would exert too much lateral force on the workpiece and deflect it laterally. It would be similar with a driven regulating wheel as the last disc.
  • the arrangement of an output support plate made of steel is particularly useful if galvanic CBN grinding wheels are used. In these, their diameter changes in the course of their use only to a very small extent; the effect of the output support disk thus remains virtually unchanged.
  • a further advantageous embodiment of the output support disk is that it is provided on the steel base body with a thin damping coating, which has a damping effect on the finished workpiece at the outlet from the grinding gap on the one hand.
  • the smoothness of the workpiece from the grinding gap can be further improved (thus also the surfaces, measurement and form accuracy on the workpiece).
  • the thin damping coating can still absorb small changes in diameter of the grinding wheel.
  • the effect of the input support disk can be further assisted by arranging a means for pre-centering the continuous rod-shaped workpiece in front of the multiple set.
  • This device may consist of a support prism and a pressure roller associated therewith, wherein the workpiece passes between the support prism and the pressure roller. The pre-centering device thus facilitates the first entry of the workpiece into the grinding path.
  • a device which gives the workpiece a feed in its longitudinal and movement direction.
  • the feed effect of this additional device then takes place together with the action of the thread profile on the outer circumference of the regulating wheels.
  • the effect of both institutions must be properly coordinated.
  • the inventive method for centerless cylindrical grinding of rod-shaped workpieces is specified in the claim 7.
  • the control and grinding wheels are arranged offset in the axial direction to one another and so closely adjacent in the radial direction that the control disks protrude into the axial spaces between the grinding wheels and vice versa;
  • an essential feature of the method according to the invention is that the regulating wheels and grinding wheels in the direction of passage of the workpiece have stepped increasing diameter according to the Schleiffort Vietnamese;
  • the support ruler is also adapted with its support surface to the decreasing in its longitudinal direction diameter of the workpiece.
  • the method according to the invention is achieved in an advantageous manner that in the grinding operation, a continuous radial infeeding the grinding and / or regulating wheels to the workpiece is no longer required. Rather, the grinding and regulating wheels remain unchanged in their radial position relative to the workpiece;
  • the workpiece continuously passes through the successively formed grinding gaps of control and grinding wheels, whose spacing from one another progressively decreases gradually in accordance with the progress of the grinding step from the entrance E to the exit A of the grinding path. This reduction is due to the fact that the diameter of the control and grinding wheels gradually larger towards the exit of the grinding path become.
  • the radial feed movement of the control and grinding wheels in the current grinding operation is thus replaced by the movement of the rod-shaped workpiece in its longitudinal direction.
  • rod-shaped workpieces should also include pipes.
  • the rods or pipes in question should have a length of, for example, 6 meters
  • the longitudinal and rotational axes of the regulating wheels, the grinding wheels and the workpiece run parallel to each other, and so does the same
  • the longitudinal axis of the support ruler may also be slightly inclined to the longitudinal axis of the workpiece in accordance with the diameter decrease of the workpiece.
  • FIG. 1 is an illustration of the prior art "under center” grinding.
  • Fig. 2 shows the procedure according to the invention.
  • FIG. 2a shows the function of the device according to FIG. 2 in the opposite direction of rotation of the grinding wheel.
  • Fig. 3 is a part of Fig. 2 associated partial view from above of a device according to the
  • Fig. 4 serves to explain the procedure in a device according to the invention, wherein the representation is schematic and does not show the actual assignment of the individual parts to each other.
  • FIGS. 5a and 5b explain details of a regulating wheel.
  • Fig. 6 shows a detail at the input side of the device according to the invention.
  • Fig. 1 shows schematically the process of centerless cylindrical grinding in a device according to the prior art.
  • the rod-shaped workpiece 1 thereby moves in the direction of its longitudinal axis 2, ie perpendicular to the drawing plane, through a grinding path formed by regulating wheels 3, grinding wheels 5 and the support ruler 7.
  • two pairs of control and grinding wheels 3, 4 are arranged one behind the other in the direction of the workpiece longitudinal axis 2.
  • control wheels 3 rotate about their axes of rotation 4 and are delivered in the feed direction 9 (X1 axis) against the workpiece 1, which is thereby driven to rotate about its longitudinal axis 2, see.
  • the direction of rotation arrows 12 and 13 The grinding wheels 5 are also driven to rotate about their axes of rotation 6 and cause the delivery in their feed direction 10 (X2 axis), the cylindrical grinding.
  • the rod-shaped workpiece 1 rests on the support surface 8 of the support ruler 7. According to FIG.
  • the regulating wheel 3 and the grinding wheel 5 form a downwardly widening grinding gap 15, which is closed at the bottom by the support ruler 7 so that the rod-shaped workpiece 1 is in linear contact with the regulating wheel 3, the grinding wheel 5 and the support surface 8 of the support ruler 7 is included and held. From the safe guidance and the quietest possible position of the workpiece 1, despite its rotation and despite the grinding process, the grinding result depends to a great extent, which is especially true for the achievable dimensional accuracy, roundness and surface quality. It should also be noted that the diameter of the workpiece 1 during grinding changes constantly.
  • the arrangement of the workpiece 1 in the grinding gap 15 shown in Fig. 1 is referred to in practice as "arrangement below the center”. This means that the workpiece 1 is located in the grinding gap 15 below a reference plane 14 which passes through the axes of rotation 4, 6 of control and grinding wheel 3, 5, and that the support surface 8 of the support ruler 7 below this reference plane 14th located.
  • the rod-shaped workpiece 1 can not wander in the grinding gap 15 or leave it because it would have to migrate up into the narrowing grinding gap 15 and is blocked down by the support ruler 7.
  • the workpiece 1 is effectively "clamped” in the grinding gap 15. It is therefore possible to work with great forces when driving and grinding the workpiece 1.
  • the favorable force ratios allow the use of steel control disks 3 without the risk of sliding and slipping consists.
  • FIG. 1 also shows the limits of the known devices when the workpiece 1 is to be arranged in the grinding gap 15 between the reference plane 14 and the support surface 8 of the support ruler 7 during centerless cylindrical grinding.
  • workpieces 1 of smaller initial diameter then get closer and closer to the reference plane 4 and are then in a region of the grinding gap 15, in which the peripheral surfaces of control and grinding wheel 3, 5 approach a course perpendicular to the reference plane 14.
  • the guidance of the workpiece 1 in the grinding gap 15 is characterized uncertain, and slipping out of the workpiece 1 on the reference plane 14 away upwards is no longer excluded. Closing lent a further narrowing of the grinding gap 5 is no longer possible, because then the control and grinding wheels 3, 5 would touch each other.
  • FIG. 2 corresponds to the front view according to FIG. 2, and FIG. 3 is the detail from a view from above of the decisive functional parts of a cylindrical grinding machine designed according to the invention.
  • the control discs 3 are arranged on a common control disc spindle 16 and the grinding wheels 5 on a common grinding wheel spindle 17. Between the individual control and grinding wheels 3, 5 are axial spaces 23, 24.
  • Fig. 1 As Fig.
  • the regulating wheel spindle 16 and the grinding wheel spindle 17 are arranged parallel to each other at a close distance, so that the individual control disks 3 engage in the axial interspaces 24 between the grinding wheels 5 and vice versa the grinding wheels 5 in the axial interspaces 23, between the regulating wheels 3 are available.
  • the regulating wheel spindle 16 all control wheels 3 are rotated together, as all grinding wheels 5 on the common grinding wheel spindle 17th
  • the broken line in Fig. 3 workpiece 1, which is below the control and grinding wheels 3, 5, is thereby set in rotation and ground, where it passes in the axial direction of passage 22 through the grinding gap 15 and thus through the grinding path.
  • a Umsch adoptedungsdreieck 20 or 21 is shown in Figures 1 and 2, the sides of the contact tangent of the workpiece 1 on the control and grinding wheel 3, 5 and from the support surface 8 of the support ruler 7 is formed.
  • the upper angle of the projecting into the grinding gap 15 tip is substantially larger in the Umsch conductedungsdreieck 21 of the cylindrical grinding machine according to the invention than in the enclosing triangle 20 according to the prior art.
  • the workpiece 1 with the small diameter is reliably stable and kept quiet; This makes possible an operating mode in which the workpiece 1 rotates about its longitudinal axis 2 with the same direction of rotation 13 as the grinding wheels 5 about the axes of rotation 6, so that an opposing circumferential movement results at the mutual points of engagement, cf.
  • the direction of rotation arrows 12 and 13. Just as well as the operation is possible with opposite direction of rotation, see. Fig. 2a.
  • the stable "clamping" of the workpiece 1 in the grinding gap 15 creates the prerequisite for working with CBN grinding wheels 5, which achieve a high machining volume.
  • FIG. 2a shows yet another essential detail.
  • the circumference of the grinding wheel 5 moves at its point of contact with the workpiece 2 into the grinding gap, ie toward the reference plane 14.
  • the grinding wheel 5 thus exerts a force effect on the workpiece 1, which leads to an additional pressure of the workpiece on the regulating wheel 3.
  • wear of the pad ruler is reduced.
  • the arrangement of the control and grinding wheels 3, 5 mutually offset in the axial direction means for the workpiece 1 that there is a risk of bending, albeit slight, which could worsen the grinding result in the worst case.
  • the axial width b3 of the control discs 3 is made larger than the axial width b5 of the grinding wheels 5, so that the acting during grinding in the radial direction high feed force of the grinding wheels 5 can be taken with certainty from the control discs 3.
  • the width s18 of the axial gap 18 must be kept as low as possible, which consists in the lateral overlap regions 19 between the control wheels 3 and the grinding wheels 5.
  • a general rule can not be drawn up for this purpose; but it can be reliably determined by experiments without much effort, how small the gap width s18 can be without the control and grinding wheels 3, 5 affect each other in the continuous manufacturing operation each other in their function or even touch.
  • a guideline for practice for example, be the range between 0.5 to 2 mm.
  • FIG. 4 the scheme of a cylindrical grinding machine according to the invention is shown, in which a series of three control discs 3 cooperates with a series of three grinding wheels 5.
  • the representation of FIG. 4 does not correspond to the actual arrangement of the control and grinding wheels 3, 5.
  • a representation has been selected which corresponds to a section line in FIG. 2 through the axis of rotation 4 of the regulating wheel 3 Longitudinal and rotational axis 2 of the workpiece 1 and the axis of rotation 6 of the grinding wheel 5 corresponds.
  • the three axes of rotation 4, 2 and 6 are on a common line, and in Fig. 4, the interaction of the discs 3, 5 with the workpiece 2 is clear.
  • the grinding path shown in FIG. 4 may be preceded by a device which gives the rod-shaped workpiece 1 a feed in its longitudinal and passage direction 2 or 22. Since such devices belong to the prior art, they need not be shown here in detail.
  • the outer diameter of the grinding wheels 5 arranged on the common grinding wheel spindle 17 increases in the order from the input E
  • the support ruler 7 must be adapted to this decrease in the workpiece diameter.
  • it can be made oblique over the entire length of the grinding path or consist of individual adapted sections, which in the direction of passage 22 gradually protrude step by step into the grinding channel 15.
  • the decrease of the workpiece diameter is greatly exaggerated in Fig. 4, so that the operating principle is clearly visible.
  • the grinding wheels 5 are electroplated, ceramically bonded or metal bonded CBN grinding wheels, which are preferred because of their high cutting performance and their stability.
  • the control discs 3 have a base made of steel and are provided on its outer periphery with a friction lining, which may consist of a galvanically bonded CBN layer.
  • the friction lining is expediently designed as a thread profile 25, cf.
  • the outer contour of the thread profile 25 may be arched (FIG. 5a) or rectilinear (FIG. 5b).
  • the forms of the convex contour of the thread form shown in Fig. 5a show on the left a spherical shape "composed of round elements.”
  • the second embodiment on the right is composed of straight elements, but mixtures of the individual forms of representation are also conceivable
  • Regulator disks 3 then exert an axial thrust in the direction of passage 22 on the rod-shaped workpiece 1, similar to a screw conveyor, and can thus support or even replace the already mentioned advancing device, which precedes the input E of the grinding path.
  • a thread profile 25 made of a CBN friction lining can also absorb soiling on the workpiece 1 to a certain extent via the thread pitch of the thread profile 25 in conjunction with the speed of the control disks 3. Grain over de n covering protrudes.
  • another device 29 is arranged, which consists of a support prism 30 and a pressure roller 31, between which the rod-shaped workpiece 1 passes, see. Fig. 6.
  • the rod-shaped workpiece 1 is pre-centered and stably inserted into the grinding gap 15. This results in a targeted grinding of the workpiece 1, and the tendency to chatter when grinding is prevented.
  • the rod-shaped workpiece 1 passes next into the area of action of an input support disk 26. This is rotatably mounted on the regulating wheel spindle 16, preceded by the control disks 3 and connected to the control disk 3. driven together with these for rotation.
  • the input support disk 26 is provided with an elastic peripheral coating 27 and can compensate for the lateral deviation of a non-circular workpiece 1 when it enters the grinding path as a raw rod with its front end. In this way, the non-circular workpiece 1 is safely introduced into the grinding gap 15.
  • an output support disk 28 is provided on the side of the grinding wheels 5. It is freely rotatably mounted on the grinding wheel spindle 7, so it is not driven together with the grinding wheels 5.
  • the output support plate 28 may be made of steel and receives its rotary drive by contact with the workpiece 1; it has no thread profile on its circumference.
  • the task of the output support disk 28 is to compensate for the forces acting on the rod-shaped workpiece 1 at the output A of the grinding path.
  • a grinding wheel 5 as the last disc would exert too much lateral force on the workpiece 1 and deflect it laterally. It would be similar with a driven regulating wheel 3 as the last disc.
  • the arrangement of an output support plate 28 made of steel is particularly useful when using CBN grinding wheels; because in these the diameter is reduced in the course of its useful life only to a very small extent; the effect of the output support disk 28 then remains almost unchanged.
  • An unillustrated regulating wheel support causes the radial delivery of the regulating wheel spindle 16 with all its control disks 3 and the input support disk 26 to the workpiece; Similarly, an unillustrated grinding wheel support for radial feed of the grinding wheel spindle 17 with all its grinding wheels 5.
  • the position of the control and grinding wheels 3, 5 radially to the workpiece 1 is not or only insignificantly changed because of Diameter of the CBN grinding wheels 5 remains virtually unchanged over its service life.
  • a new delivery is required only when changing the grinding wheels 5 or when changing to workpieces with a different diameter.
  • a constant readjustment of grinding and regulating wheel 3, 5, according to the decreasing workpiece diameter is anyway not required in the continuous grinding process, because the rod-shaped workpiece 1 yes instead through a gradually narrowing grinding gap 5 passes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

L'invention concerne une rectifieuse cylindrique sans centre dans laquelle la pièce (1) se situe dans une fente de rectification (15) formée par le disque de réglage (3), le disque de rectification (5) et la réglette (7). Le disque de réglage (3) tourne autour de son axe de rotation avec le sens de rotation (11) et entraîne donc la pièce (1) à tourner dans le sens de rotation (13). Le disque de rectification (5) est entraîné à tourner autour de son axe de rotation (6) avec le sens de rotation (12). La pièce (1) traverse dans le sens de son axe longitudinal plusieurs groupes de disques de réglage (3) et de disques de rectification (5) disposés respectivement individuellement les uns derrière les autres dans le même axe. Les disques de réglage et de rectification (3, 5) présentent sur leurs axes des intervalles axiaux; les disques de réglage (3) s'insèrent dans les intervalles entre les disques de rectification (5) et inversement, de sorte que des zones de recouvrement latérales (19) sont formées entre les disques (3, 5). En conséquence, on obtient une fente de rectification (15) déplacée vers le bas, s'élargissant vers le bas et garantissant un support fiable de la pièce (1) sur les disques de réglage et de rectification (3, 5). Un plan de référence commun (14) et le triangle d'enceinte (21) illustrent clairement les avantages de cette demande. Des pièces (1) d'un petit diamètre sont elles aussi insérées avec fiabilité dans la fente de rectification (15) déplacée vers le bas, de sorte qu'une rectification associée à un volume élevé d'enlèvement de copeaux est possible.
EP11707835.2A 2010-03-09 2011-03-07 Rectifieuse cylindrique sans centre destinée à rectifier des pièces en forme de tige et procédé de rectification cylindrique sans centre de pièces en forme de tige Active EP2544857B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010758.1A DE102010010758B4 (de) 2010-03-09 2010-03-09 Spitzenlose Rundschleifmaschine zum Schleifen von stangenförmigen Werkstücken und Verfahren zum spitzenlosen Rundschleifen von stangenförmigen Werkstücken
PCT/EP2011/053396 WO2011110529A1 (fr) 2010-03-09 2011-03-07 Rectifieuse cylindrique sans centre destinée à rectifier des pièces en forme de tige et procédé de rectification cylindrique sans centre de pièces en forme de tige

Publications (2)

Publication Number Publication Date
EP2544857A1 true EP2544857A1 (fr) 2013-01-16
EP2544857B1 EP2544857B1 (fr) 2014-03-05

Family

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EP11707835.2A Active EP2544857B1 (fr) 2010-03-09 2011-03-07 Rectifieuse cylindrique sans centre destinée à rectifier des pièces en forme de tige et procédé de rectification cylindrique sans centre de pièces en forme de tige

Country Status (11)

Country Link
US (1) US8944891B2 (fr)
EP (1) EP2544857B1 (fr)
JP (1) JP5826196B2 (fr)
KR (1) KR101719535B1 (fr)
CN (1) CN102933351B (fr)
BR (1) BR112012022825B1 (fr)
CA (1) CA2792670C (fr)
DE (1) DE102010010758B4 (fr)
ES (1) ES2455975T3 (fr)
RU (1) RU2551747C2 (fr)
WO (1) WO2011110529A1 (fr)

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CN113084599B (zh) * 2021-04-02 2021-12-21 成都光明光电股份有限公司 玻璃棒的加工方法

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Also Published As

Publication number Publication date
JP5826196B2 (ja) 2015-12-02
WO2011110529A1 (fr) 2011-09-15
EP2544857B1 (fr) 2014-03-05
JP2013521147A (ja) 2013-06-10
KR20130004914A (ko) 2013-01-14
US20130165022A1 (en) 2013-06-27
BR112012022825A2 (pt) 2018-05-15
DE102010010758A1 (de) 2011-09-15
BR112012022825B1 (pt) 2020-11-17
DE102010010758B4 (de) 2014-03-06
US8944891B2 (en) 2015-02-03
RU2012142822A (ru) 2014-04-20
RU2551747C2 (ru) 2015-05-27
CA2792670A1 (fr) 2011-09-15
KR101719535B1 (ko) 2017-03-24
CA2792670C (fr) 2018-04-17
CN102933351A (zh) 2013-02-13
CN102933351B (zh) 2016-08-10
ES2455975T3 (es) 2014-04-16

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