JP2014188654A - Method of manufacturing columnar member, and centerless grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a product having a conical part from a work-piece of a columnar body, which is the method of manufacturing a columnar member having the conical part, with high productivity, without being limited by a workable range of a grinding wheel with respect to a workpiece and a support range of a regulating grinding wheel with respect to the workpiece, and to provide a centerless grinder for actualizing the method of manufacturing the product.SOLUTION: In the method of manufacturing the columnar member having the conical part, a columnar surface shape of a work-piece 11 of the columnar body is supported by a regulating grinding wheel 12 with a feed angle given thereto and a blade 14, a columnar surface of the grinding wheel 13 is brought into contact with a columnar surface of the work-piece 11 while making a grinding wheel 13 having the columnar surface be opposed to the regulating grinding wheel 12 by sandwiching the blade 14 between them, and be rotated, and through-feed grinding is performed while continuously moving the grinding wheel 13 or the regulating grinding wheel 12 toward the axial center of the work-piece 11.

Description

  The present invention relates to a columnar member manufacturing method and a centerless grinding machine for manufacturing a columnar member having a conical portion.

  Various methods have been proposed for grinding cylindrical members, but a centerless grinding machine that grinds the surface of a cylindrical member without supporting the shaft of the cylindrical member has a highly accurate grinding surface. It has the advantage of being easily formed and is widely used. Conventional centerless grinding technology uses in-feed grinding (stop grinding) in which a cylindrical workpiece is supported by a blade and the grinding wheel and adjusting wheel are fed in the radial direction for polishing, or the axis of the adjusting wheel is the center of the workpiece. Thru-feed grinding (pass grinding), in which an axial component force (thrust) is generated in the adjusting wheel by inclining with respect to the shaft center and the workpiece is sent in the axial direction by this thrust to polish, is mainly used, for example, twist Infeed grinding is used to process a cylindrical portion of a workpiece such as a drill into a conical shape (see, for example, Patent Document 1).

  FIG. 3 is a diagram for illustrating a method of manufacturing a cylindrical member having a conical portion in in-feed grinding. 31 is a workpiece, 32 is an adjusting grindstone having an outer shape corresponding to the outer shapes of the conical portion 31a of the workpiece 31 and the cylindrical portion 31b in the vicinity thereof, and 33 is a conical portion 31a of the workpiece 31. And a grinding wheel having an outer shape corresponding to the outer shape of the cylindrical portion 31b in the vicinity thereof. The workpiece 31 is supported on the lower side by a blade (not shown), and the workpiece 31 is ground while rotating between the adjustment grindstone 32 and the grinding wheel 33 when the grinding grindstone 33 is brought close to the adjustment grindstone 32. The At this time, as shown in the figure, the head of the workpiece 31 is pressed by the stopper 34, and the conical portion 31a and a part of the cylindrical portion 31b in the vicinity thereof are in-feed with the movement in the axial direction stopped. It will be ground in. Next, if the stopper 34 is removed to allow the workpiece 31 to move in the axial direction and the adjusting grindstone 32 is accelerated, the workpiece 31 receives the feed from the adjusting grindstone 33 and moves in the axial direction. On the other hand, the cylindrical portion 31b is ground by the slew feed method with a portion corresponding to the outer shape of the cylindrical portion 31b of the workpiece 31 of the grinding wheel 33.

Japanese Patent No. 2501142

  In the conventional method using in-feed grinding, the processing of the conical portion is formed in accordance with the outer shape of the adjusting wheel and the grinding wheel. Therefore, the processing range of the grinding wheel and the support range of the adjusting wheel for the workpiece are set. It was difficult to process the conical portion exceeding (adjustment grindstone, width of grindstone). Further, in-feed grinding has a limited production capacity because the workpiece cannot be continuously supplied compared to through-feed grinding. In view of such a problem, the present invention is a method for manufacturing a workpiece having a conical portion from a cylindrical workpiece, and is applicable to a workable range for a grinding wheel workpiece or an adjustment grindstone workpiece. It aims at providing the manufacturing method of the cylindrical member which has a cone part with high productivity without being restrict | limited to a support range, and the centerless grinding machine for implement | achieving the manufacturing method.

  A method of manufacturing a cylindrical member having a conical portion, wherein the cylindrical grindstone having a cylindrical surface is supported by the blade while the cylindrical grindstone having a cylindrical surface is supported by the adjusting grindstone and the blade provided with a feed angle. The cylindrical surface of the grinding wheel is brought into contact with the cylindrical surface of the workpiece while rotating while being opposed to the adjusting grindstone, and the grinding wheel or the adjusting grindstone is continuously directed toward the axis of the workpiece. A cylindrical member manufacturing method that performs slew-feed grinding while moving.

  While supporting the cylindrical surface shape of the cylindrical workpiece by the adjusting grindstone and the blade provided with the feed angle, while rotating the grinding grindstone having a cylindrical surface facing the adjusting grindstone with the blade interposed therebetween, A step of bringing the cylindrical surface of the grinding wheel into contact with the cylindrical surface of the workpiece and forming a cylindrical portion by slew-feed grinding, and when the slew-feed grinding of the workpiece reaches an arbitrary position, the grinding wheel or adjustment Forming the conical portion by slew-feed grinding while continuously moving the grindstone toward the central axis of the workpiece.

  Further, the time after the tip of the workpiece is recognized by a sensor provided on the downstream side of the slew feed grinding, that the slew feed grinding of the workpiece has reached an arbitrary position, and the slew feed A cylindrical member manufacturing method is calculated from the relationship with the grinding feed rate.

  A cylindrical grinding wheel that can move around, a cylindrical adjustment wheel that can move around and spaced apart from the grinding wheel, and a blade disposed between the adjusting wheel and the grinding wheel A centerless grinding machine that supports a workpiece of a cylindrical body by the adjusting grindstone and the blade and performs the slew-feed grinding by bringing the grinding wheel into contact with the workpiece, and stops the slew-feed grinding. A centerless grinding machine having a control unit for continuously moving the grinding wheel or the adjusting grindstone with respect to the axis of the workpiece.

  It has a sensor unit that detects that the workpiece has been processed to an arbitrary position by the through feed grinding, and the control unit moves the grinding wheel or the adjustment wheel based on the detection signal detected by the sensor unit. A centerless grinding machine.

  The sensor unit is a centerless grinding machine installed on the workpiece discharge side of the slew feed grinding.

  The cylindrical member having a conical portion can be manufactured with high production efficiency without being limited by the processing range of the grinding wheel and the support range of the adjusting wheel.

The figure for demonstrating the manufacturing method and centerless grinding machine of the cylindrical member of this invention. The figure for demonstrating the manufacturing method and centerless grinding machine of the cylindrical member of this invention. The figure for showing the manufacturing method of the cylindrical member which has a cone part in in-feed grinding.

  A method for manufacturing a cylindrical member and a centerless grinding machine according to the present invention will be described with reference to the drawings. FIG. 1 is a view for explaining a cylindrical member manufacturing method and a centerless grinder according to the present invention, and FIG. 2 is a view schematically showing an AA cross section of the centerless grinder shown in FIG. The centerless grinder 10 includes a cylindrical grinding wheel 13 that can move around, a cylindrical adjustment wheel 12 that can move around and that is spaced from and faces the grinding wheel 13, and the adjusting wheel 12 and the grinding wheel 13. And a blade 14 disposed therebetween. The adjusting grindstone 12 is fixed and mounted on a moving table 15 that is movable with respect to the axis of the columnar workpiece 11. The moving table 15 is connected to a driving device 16 that includes a linear motor or a feed screw mechanism. The moving table is moved by the driving device 16. The adjusting grindstone 12 is tilted at an axis of 1 ° to 4 ° with respect to the axis of the workpiece 11 in order to generate thrust for through-feed grinding. Further, the driving device 16 is connected to the control unit 17, and by inputting an arbitrary moving amount and moving time to the control unit 17, the moving table 15 and the adjusting grindstone 12 on the moving table 15 are input according to the input values. Is configured to move. A rail 18 for supporting the processed workpiece 11 is installed in the discharge direction of the workpiece 11 in the through feed grinding.

  In addition, a sensor 19 for detecting the processing progress of the workpiece 11 can be installed in the discharge direction of the workpiece 11 in the slew feed grinding. The sensor 19 is connected to the control unit 17, and when the sensor 19 detects that the processed workpiece 11 has passed a specific point on the rail 18, the control unit 17 that has obtained the detection signal is measured in advance. The movement table 15 is moved when the machining position calculated from the feed rate of the through feed grinding and the elapsed time from the detection of the sensor 19 coincides with the machining start position of the cone portion arbitrarily set by the operator. It is configured to start and form a conical portion in the workpiece 11. Further, the inclination of the conical portion formed on the workpiece 11 moves the moving table 15 in accordance with the feed speed of in-feed grinding, the moving amount of the moving table 18 (adjusting grindstone 12) input by the operator in advance, and the moving time. It can be adjusted by setting as follows.

  Next, a method for manufacturing a cylindrical member having a cylindrical portion and a conical portion using the centerless grinding machine 10 will be described. First, the cylindrical workpiece 11 is supplied to the centerless grinding machine 10. The cylindrical workpiece 11 is supported by a blade 14 and an adjusting grindstone 12 that is a rotating grindstone. Then, the grinding wheel 13 which is a rotary grinding wheel contacts the workpiece 11 while rotating in the direction of the circular arc arrow R1, and the surface of the workpiece 11 is ground.

  The workpiece 11 supported by the blade 14 and the adjusting grindstone 12 is slew-feed ground by the grinding grindstone 13 to machine the cylindrical portion. Since the workpiece 11 is processed by through-feed grinding, the processed workpiece 11 is discharged onto the rail 18. The end portion of the workpiece 11 discharged onto the rail 18 moves on the rail 18 as the slew feed grinding proceeds, and the sensor 19 detects the end portion of the processed workpiece 11.

  When the sensor 19 detects the end of the workpiece 11 that has been processed, the detection signal is sent to the control unit 17 and is based on an arbitrary amount of movement and time set in advance to form a conical part. The moving grindstone 12 fixed and mounted on the moving table 15 and the moving table 15 by the driving device 16 starts moving toward the axis of the workpiece 11 continuously. As the adjusting grindstone 12 moves, the cut of the workpiece 11 becomes large, and a conical portion is formed. As described above, a columnar member having a columnar portion and a conical portion can be manufactured.

  According to the present invention, a sharp cone or a gentle cone can be freely formed according to the feed speed of the slew feed grinding measured in advance, the moving amount of the adjusting grindstone arbitrarily set by the operator, and the moving time, Various conical parts can be formed beyond the processing range of the grinding wheel and the support range of the adjusting wheel. In addition, since the manufacture of cylindrical members with conical parts is realized by through-feed grinding instead of in-feed grinding, the workpiece can be supplied continuously and compared to the production by conventional in-feed grinding. Efficiency is good.

  As mentioned above, although the centerless grinding machine of the present invention and the manufacturing method of the cylindrical member having the cylindrical portion and the conical portion have been described based on the embodiments, the present invention is not limited to the form described in the embodiments, Various design changes are possible within that range. For example, in the present invention, the adjusting grindstone is movable with respect to the axis of the workpiece, but the grinding grindstone may be movable with respect to the axis of the workpiece instead of the adjusting grindstone.

  Further, the sensor for detecting the processing state of the workpiece may be disposed on the workpiece supply side instead of being disposed on the workpiece discharge side. In this case, the conical portion is formed with the end portion on the processing progress side as the reference position of the conical portion, instead of using the tip portion of the processing progress of the workpiece as a reference for forming the conical portion.

  In addition, it is possible to manufacture a cylindrical member consisting of only a conical portion by moving the adjusting grindstone with respect to the axis of the workpiece according to an arbitrary movement amount and movement time immediately after starting the supply of the workpiece. If the movement of the grindstone is divided into a plurality of times, it is possible to manufacture a cylindrical member having a multistage shape having a plurality of cylindrical portions and a plurality of conical portions, for example. Furthermore, by setting a plurality of moving amounts and moving times of the adjusting grindstone, it is possible to manufacture a cylindrical member having a multi-stage conical part composed of a sharp part and a gentle part of the cone.

DESCRIPTION OF SYMBOLS 10 Centerless grinding machine 11 Workpiece 12 Adjustment grindstone 13 Grinding grindstone 14 Blade 15 Moving table 16 Drive device 17 Control part 18 Rail 19 Sensor 31 Workpiece 31a Conical part 31b Cylindrical part 32 Adjustment grindstone 33 Grinding grindstone 34 Stopper

Claims (6)

A method for producing a cylindrical member having a conical portion,
The adjusting grindstone and the blade provided with the feed angle support the cylindrical surface shape of the cylindrical workpiece, and the grinding grindstone having the cylindrical surface is rotated while facing the adjusting grindstone with the blade interposed therebetween. A cylindrical shape characterized in that the cylindrical surface of the grindstone is brought into contact with the cylindrical surface of the workpiece, and the feed grindstone or the adjustment grindstone is continuously moved toward the axis of the workpiece, and the feed is ground. Manufacturing method of member. While supporting the cylindrical surface shape of the cylindrical workpiece by the adjusting grindstone and the blade provided with the feed angle, while rotating the grinding grindstone having a cylindrical surface facing the adjusting grindstone with the blade interposed therebetween, A step of bringing a cylindrical surface of a grinding wheel into contact with a cylindrical surface of the workpiece and forming a cylindrical portion by slew feed grinding; and
When the throat feed grinding of the workpiece reaches an arbitrary location, the cone portion is formed by slew feed grinding while continuously moving the grinding wheel or the adjustment grindstone toward the central axis of the workpiece. And a process of
The method for producing a columnar member according to claim 1, wherein: That the slew feed grinding of the workpiece has reached an arbitrary location,
3. The calculation according to claim 2, wherein the calculation is based on a relationship between a time after the tip of the workpiece is recognized by a sensor provided on the downstream side of the slew feed grinding and a feed speed of the slew feed grinding. The manufacturing method of the cylindrical member of this. A cylindrical grinding wheel that can move around, a cylindrical adjustment wheel that can move around and spaced apart from the grinding wheel, and a blade disposed between the adjusting wheel and the grinding wheel A centerless grinding machine for supporting a workpiece of a cylindrical body by the adjusting grindstone and the blade and performing the slew feed grinding by bringing the grinding wheel into contact with the workpiece,
A centerless grinding machine, comprising: a control unit for continuously moving the grinding wheel or the adjusting wheel with respect to the axis of the workpiece without stopping the through feed grinding. A sensor unit that detects that the workpiece has been processed to an arbitrary position by the slew feed grinding;
The centerless grinding machine according to claim 4, wherein the control unit moves the grinding wheel or the adjustment wheel based on a detection signal detected by the sensor unit.   The centerless grinding machine according to claim 4 or 5, wherein the sensor unit is installed on the workpiece discharge side of the slew feed grinding.

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