JP2011101933A - Grinding method for cylindrical workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding method for a cylindrical workpiece capable of grinding not only an outer diameter side but also an inner diameter side to a desired dimension without directly measuring the inner diameter side and performing grinding machining in a shorter time using an outer grinding tool, an inner grinding tool and a measurement means capable of measuring the outer diameter side. <P>SOLUTION: The grinding method for the cylindrical workpiece includes: a step for tentatively grinding a part of a machining position of the outer diameter of the cylindrical workpiece W by the inner grinding tool TN, obtaining the position information of the inner grinding tool and measuring a dimension of a portion (WK) tentatively ground by the outer diameter measurement means 60; a step for determining an inner grinding tool tip position, i.e., a position of a radial tip of the cylindrical workpiece in the inner grinding tool based on the position information of the inner grinding tool when tentative grinding is performed and a dimension of the outer diameter of the tentatively ground portion; a step for grinding the inner diameter of the cylindrical workpiece by controlling a position of the inner grinding tool based on the inner grinding tool tip position; and a step for grinding the outer diameter of the cylindrical workpiece including a portion tentatively ground using the outer grinding tool. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cylindrical workpiece grinding method for grinding both an outer diameter side and an inner diameter side of a cylindrical workpiece.

Conventionally, various grinding machines including an outer grinding wheel that grinds the outer diameter side of a cylindrical workpiece that rotates around the workpiece rotation axis and an inner grinding wheel that grinds the inner diameter side have been disclosed. Various methods have been disclosed, such as an outer diameter side grinding method and dimension measuring method, and an inner diameter side grinding method and dimension measuring method.
For example, in the prior art described in Patent Document 1, an outer grinding wheel, an inner grinding wheel, and a measuring device are arranged at respective positions of a swivel base, and a single measuring device (measuring instrument) is used to An NC grinder capable of measuring an outer diameter, an inner diameter, an end face position, and the like is disclosed.
The prior art described in Patent Document 2 is equipped with an internal grinding wheel and an inner diameter measuring device, and when the inner grinding wheel is moved into and out of the hole of the workpiece, the signal from the inner diameter measuring device is appropriately applied. A method for intermittently measuring a workpiece inner diameter in an internal grinding machine that is taken in at a proper timing is disclosed.

JP-A-3-228571 JP 57-1659 A

In the prior art described in Patent Document 1, the outer grinding wheel, the inner grinding wheel, the measuring device, and the cutting tool are arranged on each side of the rectangular swivel, so the outer diameter side is set with the outer grinding wheel. When grinding and measuring the outer diameter side, and further grinding the outer diameter side based on the measurement results, it is necessary to rotate the swivel base each time to change the outer grinding wheel and measuring device. (The same applies to the inner diameter side), so only one measuring device is required, but the processing time becomes longer.
In addition, the prior art inner diameter measuring device described in Patent Document 2 can measure the inner diameter side while machining the inner diameter side with an internal grinding stone, but only the inner diameter side can be measured. Separately, a measuring device on the outer diameter side is required.
The present invention was devised in view of such points, and uses an outer grinding wheel, an inner grinding wheel, and a measuring means capable of measuring the outer diameter side, and without directly measuring the inner diameter side, It is an object of the present invention to provide a method of grinding a cylindrical workpiece, which can be ground to a desired dimension on both the radial side and the inner diameter side and can be ground in a shorter time.

As a means for solving the above-mentioned problems, the first invention of the present invention is a cylindrical workpiece grinding method as described in claim 1.
The cylindrical workpiece grinding method according to claim 1 includes an outer grinding wheel capable of grinding an outer diameter of the cylindrical workpiece, an inner grinding stone capable of grinding an inner diameter of the cylindrical workpiece, and an outer surface of the cylindrical workpiece. A cylindrical workpiece grinding method using a composite grinding machine having an outer diameter measuring means capable of measuring a diameter.
Then, a part of the outer diameter of the cylindrical workpiece is subjected to trial grinding with the internal grinding wheel to obtain positional information of the internal grinding stone, and the trial grinding of the portion subjected to the trial grinding with the outer diameter measuring means. Based on the step of measuring the dimensions, the position information of the internal grinding wheel at the time of the trial grinding, and the dimension of the outer diameter of the portion subjected to the trial grinding, the radial direction of the cylindrical workpiece in the internal grinding stone A step of obtaining the tip position of the internal grinding wheel that is the position of the tip portion, and without directly measuring the inner diameter of the cylindrical workpiece, the position of the internal grinding wheel is controlled based on the tip position of the internal grinding wheel. A method of grinding a cylindrical workpiece, comprising: grinding an inner diameter of the cylindrical workpiece; and grinding an outer diameter of the cylindrical workpiece including a portion subjected to the trial grinding using the outer grindstone.

The second invention of the present invention is a grinding method for a cylindrical workpiece as described in claim 2.
The cylindrical workpiece grinding method according to claim 2, wherein a radial direction in the outer step portion of the cylindrical workpiece having an inner step portion with a different inner diameter at the inner diameter portion and an outer step portion with a different outer diameter at the outer diameter portion. An outer grinding wheel capable of grinding an outer end face which is a surface orthogonal to the inner end face, an inner grinding wheel capable of grinding an inner end face which is a surface perpendicular to the radial direction of the inner stepped portion of the cylindrical work, and the cylindrical work A cylindrical workpiece grinding method using a composite grinding machine comprising: an end face position measuring means capable of measuring a position in a workpiece rotation axis direction perpendicular to the radial direction of the cylindrical workpiece on the outer end face.
Then, a part of the processing portion on the outer end surface of the cylindrical workpiece is subjected to trial grinding with the internal grinding wheel to obtain position information of the internal grinding wheel, and the portion subjected to the trial grinding with the end surface position measuring means Measuring the position in the direction of the workpiece rotation axis, the position information of the internal grinding wheel at the time of the trial grinding, and the position in the direction of the workpiece rotation axis on the outer surface that has been trial-ground. The step of obtaining the tip position of the internal grinding wheel that is the position of the tip portion in the direction of the workpiece rotation axis in the inner grinding wheel tip without directly measuring the position in the direction of the workpiece rotation axis on the inner end surface of the cylindrical workpiece A step of grinding the inner end face of the cylindrical workpiece by controlling the position of the internal grinding wheel based on the position, and the cylindrical workpiece including the portion subjected to the trial grinding using the external grinding wheel. A step of grinding the outer end surface of a grinding method of a cylindrical workpiece made of.

The third invention of the present invention is a grinding method for a cylindrical workpiece as set forth in claim 3.
The cylindrical workpiece grinding method according to claim 3 is the cylindrical workpiece grinding method according to claim 1 or 2, wherein the trial grinding is performed using the internal grinding stone while performing the trial grinding. A cylindrical workpiece grinding method using an outer diameter measuring means or an end face position measuring means capable of measuring a machining part of the cylindrical workpiece.

A fourth invention of the present invention is a cylindrical workpiece grinding method as set forth in claim 4.
The cylindrical workpiece grinding method according to claim 4 is the cylindrical workpiece grinding method according to claim 1 or 2, wherein the portion ground by the internal grinding stone is ground by the external grinding stone. At this time, based on the outer diameter measured using the outer diameter measuring means or the position of the outer end face measured using the end face position measuring means, grinding is performed with the outer grindstone, It is a grinding method.

In the cylindrical workpiece grinding method according to claim 1, based on the position information of the internal grinding wheel when a part of the outer diameter of the cylindrical workpiece is trial-ground and the outer diameter of the trial-ground portion, The tip position of the grindstone (the tip position in the radial direction of the cylindrical workpiece) is obtained by calculation. And it can grind so that an internal diameter may become a desired dimension by controlling the position of an internal grinding wheel so that an internal diameter may become a desired dimension, without measuring an internal diameter directly. In addition, since it is not necessary to change a measuring means and an internal grinding wheel at the time of grinding of an internal diameter, an internal diameter can be ground in a shorter time.
Further, the portion subjected to the trial grinding can be ground using an external grinding wheel so as not to leave a trace of trial grinding.

Moreover, in the grinding method of the cylindrical workpiece according to claim 2, based on the position information of the internal grinding wheel when a part of the outer end face of the cylindrical workpiece is trial ground and the position of the outer end face subjected to the trial grinding. The tip position of the internal grinding wheel (tip position in the rotation axis direction of the cylindrical workpiece) is obtained by calculation. Then, without directly measuring the position of the inner end face, the position of the inner grindstone is controlled so that the position of the inner end face becomes a desired position, thereby grinding the inner end face to the desired position. be able to. In addition, since it is not necessary to change a measuring means and an internal grinding stone at the time of grinding of an inner side end surface, an inner side end surface can be ground in a shorter time.
Further, the portion subjected to the trial grinding can be ground using an external grinding wheel so as not to leave a trace of trial grinding.

  Moreover, according to the grinding method of the cylindrical workpiece according to claim 3, the machining time can be reduced by using the measuring means (so-called in-process measuring means) that can measure the machining location during the trial grinding. It can be shortened further.

Further, according to the method for grinding a cylindrical workpiece according to claim 4, when the trial ground portion has an outer diameter, the outer diameter is ground with higher accuracy by using an outer diameter measuring means and an outer grindstone. be able to.
In addition, when the trial-ground portion is the outer end face, the outer end face can be ground with higher accuracy by using the end face position measuring means and the outer grindstone.

It is a figure explaining the example of the top view of the compound grinding machine 1 used when using the grinding method of the cylindrical workpiece | work of this invention, and a side view. It is a figure explaining the position and distance of the cylindrical workpiece | work W, the external grinding wheel, and the internal grinding stone TN at the time of grinding the outer diameter and internal diameter in the grinding method of the cylindrical workpiece of this invention. It is a flowchart explaining the example of the process sequence at the time of grinding the outer diameter and the internal diameter in the grinding method of the cylindrical workpiece | work of this invention. It is a flowchart explaining the example of the process sequence at the time of grinding the outer diameter and internal diameter in the grinding method of the conventional cylindrical workpiece | work. It is a figure explaining the position and distance of the cylindrical workpiece W, the outer grinding wheel, and the inner grinding wheel TN at the time of grinding an outer side end surface and an inner side end surface in the grinding method of the cylindrical workpiece of this invention. It is a flowchart explaining the example of the process sequence at the time of grinding an outer side end surface and an inner side end surface in the grinding method of the cylindrical workpiece | work of this invention.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. FIG. 1 (A) shows an example of a plan view of a composite grinding machine 1 used when the cylindrical workpiece grinding method of the present invention is used, and FIG. 1 (B) is a side view of the composite grinding machine 1. An example of the figure (the description of the tailstock 30 is omitted) is shown.
In each figure, the X axis, the Y axis, and the Z axis are orthogonal to each other, the Y axis indicates a vertically upward direction, and the X axis indicates a workpiece rotation axis ZW direction that is a rotation axis of the cylindrical workpiece W. The Z axis indicates the direction of reciprocation of the swivel base 12.

● [Structure of composite grinding machine 1 (Fig. 1)]
Next, an example of the structure of the composite grinder 1 used when the cylindrical workpiece grinding method of the present invention is used will be described with reference to FIG.
As shown in FIG. 1A, the composite grinding machine 1 includes a base 10, a spindle table 11 that can reciprocate in the X-axis direction on the base 10, and a reciprocating movement in the Z-axis direction on the base 10. The swivel 12 is capable of swiveling around a swivel axis ZS parallel to the Y axis. In addition, about the control means (numerical control apparatus etc.) which controls each movable body, illustration is abbreviate | omitted.
The spindle table 11 reciprocates in the X-axis direction by the X-axis drive motor 11M and the feed screw 11S, and the control means sends a control signal to the X-axis drive motor 11M while detecting a signal from the position detection means 11E such as an encoder. The output is performed to position the spindle table 11 in the X-axis direction.
The swivel 12 is reciprocated in the Z-axis direction by the Z-axis drive motor 12M and the feed screw 12S, and the control means sends a control signal to the Z-axis drive motor 12M while detecting a signal from the position detection means 12E such as an encoder. The output is performed to position the swivel base 12 in the Z-axis direction.

A spindle table 20 having a chuck 21 and a tailstock 30 having a center member 31 are placed on the spindle table 11, and the chuck 21 and the center member 31 are parallel to the X-axis direction. It is coaxially arranged on the top. In addition, a truing device 25 for truing the grindstone is installed on the head stock 20.
The chuck 21 is provided on the main shaft 22, and a drive motor (not shown) is provided on the main shaft 22. The control means moves the main shaft 22 around the workpiece rotation axis ZW passing through the center of the chuck 21 at an arbitrary angular velocity. Can be rotated up to.
The center member 31 is provided on a tailstock shaft 32, and the tailstock shaft 32 is supported so as to be rotatable or non-rotatable.
The cylindrical workpiece W is held by the chuck 21, and the outer diameter side is ground by the plain grindstone TP or the angular grindstone TA, and the inner diameter side is ground by the internal grindstone TN.

The swivel base 12 has, for example, a plate shape, and a swivel motor is provided near the center of the swivel base 12. The control means outputs a control signal to the turning motor while detecting a signal from the angle detecting means such as an encoder, and controls the turning angle of the turntable 12.
On the swivel 12, an angular grindstone TA (corresponding to an outer grinding wheel) that is driven to rotate about the first grinding wheel rotation axis ZTA, and a plain grinding stone TP (outer grinding) that is driven to rotate about the second grinding wheel rotation axis ZTP. (Corresponding to a grindstone) and an internal grindstone TN that is driven to rotate about the third grindstone rotation axis ZTN are arranged so as to surround the turning motor. The first grindstone rotation axis ZTA, which is the rotation axis of the angular grindstone TA, and the second grindstone rotation axis ZTP, which is the rotation axis of the plain grindstone TP, are parallel to each other and orthogonal to the turning axis ZS.
In the example of FIG. 1, the angular grindstone TA and the plain grindstone TP are attached to end portions in one direction which is the same direction in the first grindstone rotation axis ZTA direction and the second grindstone rotation axis ZTP direction (FIG. 1 ( As shown in A), the angular grindstone TA and the plain grindstone TP are attached to the end on the left side), but they may be attached to the ends in different directions, or they are not cantilevered but are both supported. The grindstone may be supported by a formula.
Further, the composite grinding machine 1 is provided with a coolant nozzle for supplying a coolant in the vicinity of a contact portion (grinding point) between the cylindrical workpiece W and each grindstone, but the illustration is omitted.

The angular grindstone TA has at least two kinds of conical surfaces inclined with respect to the first grindstone rotation axis ZTA as grinding surfaces, and the outer diameter of the cylindrical workpiece W as shown in FIG. (Outer cylindrical surface) and outer end surface (surface orthogonal to the outer cylindrical surface) can be ground simultaneously.
The plain grindstone TP has a grinding surface (cylindrical surface) parallel to the second grindstone rotation axis ZTP. As shown in FIG. 2 (step C), the outer diameter of the cylindrical workpiece W (outer cylinder) Surface) can be ground.
The internal grinding wheel TN has a grinding surface (cylindrical surface) parallel to the third grinding wheel rotation axis ZTN. As shown in FIG. 2 (step B), the inner diameter (inner cylinder) of the cylindrical workpiece W Surface) can be ground. Further, the internal grinding wheel TN further has a grinding surface (end surface) orthogonal to the third grinding wheel rotation axis ZTN, and as shown in FIG. The end surface (surface orthogonal to the inner cylindrical surface (surface of the inner stepped portion)) can be ground.
As shown in FIG. 1B, the workpiece rotation axis ZW, the first grindstone rotation axis ZTA, the second grindstone rotation axis ZTP, and the third grindstone rotation axis ZTN are on a relative movement plane MF orthogonal to the turning axis ZS. Has been placed.
Further, the composite grinding machine 1 is provided with measuring means 60 capable of measuring the outer diameter dimension of the cylindrical workpiece W and the position of the outer end face in the workpiece rotation axis ZW direction.

● [Grinding method and processing procedure when grinding the outer and inner diameters (Figs. 2 and 3)]
Next, an example of a grinding method and a processing procedure when grinding the outer diameter and the inner diameter of the cylindrical workpiece W will be described with reference to FIGS. 2 and 3. When the outer diameter and the inner diameter are ground, the outer diameter measuring means capable of measuring at least the outer diameter of the cylindrical workpiece W is used as the measuring means 60.

As shown in the flowchart of FIG. 3, first, in step S10, the control means causes the internal grinding wheel TN to come to the cylindrical workpiece W side so that the third grinding wheel rotation axis ZTN is parallel to the workpiece rotation axis ZW. In this way, the swivel is swung, the swivel is moved relative to the cylindrical workpiece W, and a part of the machining portion of the outer diameter of the cylindrical workpiece W is trial-ground using the cylindrical surface of the internal grinding stone TN. (See (Step A) in FIG. 2).
Then, in step S20, the control means acquires the position information of the internal grinding stone TN at the time of trial grinding, and measures and obtains the outer diameter of the portion subjected to the trial grinding using the outer diameter measuring means.

Then, in step S30, the control means includes the position information of the internal grinding stone TN when trial grinding is performed, and the outer diameter of the location where trial grinding is performed (the position of the symbol WK in (Step A) in FIG. 2). Based on this, the tip position of the internal grinding wheel TN in the radial direction of the workpiece is calculated.
For example, as shown in FIG. 2 (step A), the grinder reference position Sstd, which is the reference position of the composite grinder 1, is set to the position of the tip of the main spindle 22 on the workpiece rotation axis ZW, and the grindstone reference position Tstd is the turning axis. The position is ZS.
The control means always knows the distance LST in the Z-axis direction (the radial direction of the cylindrical workpiece W) from the grinding machine reference position Sstd to the grinding wheel reference position Tstd even when the swivel is moved. Further, the distance LTnZ in the Z-axis direction from the grinding wheel reference position Tstd to the third grinding wheel rotation axis ZTN is known. However, the distance LTn in the Z-axis direction from the grinding wheel reference position Tstd to the tip of the internal grinding stone TN is unknown.
Here, the dimension of the outer diameter of the cylindrical workpiece W is acquired by the outer diameter measuring means. Therefore, the distance LWg from the workpiece rotation axis ZW to the outer peripheral surface of the cylindrical workpiece W, that is, the grinder reference position Sstd to the tip (in the workpiece radial direction) of the internal grinding stone TN is known (outer diameter dimension / 2). . Therefore, the distance LTn from the grinding wheel reference position Tstd to the tip of the internal grinding wheel TN in the workpiece radial direction can be calculated as follows: distance LTn = distance LST−distance LWg.

Next, in step S40, the control means does not directly measure the inner diameter of the cylindrical workpiece W (without using the outer diameter measurement means), and based on the calculated tip position of the internal grinding stone TN, The inner diameter of the cylindrical workpiece W is ground using the grinding wheel TN (see (Step B) in FIG. 2).
For example, as shown in FIG. 2 (step B), the control means controls the position of the grindstone reference position Tstd so that the distance LWn corresponding to the inner diameter of the cylindrical workpiece W becomes a desired value (of the swivel base). Move the position relative). In this case, distance LWn = distance LTn−distance LST can be obtained.

  In step S50, the control means turns the swivel so that the outer grindstone comes to the cylindrical workpiece W side, moves the swivel relative to the cylindrical work W, and uses the outer diameter measuring means. Based on the measured outer diameter (the outer diameter at the position WK in FIG. 2 (Step C)), the outer diameter including the trial-ground portion is ground using the outer grindstone (no trace of trial grinding is left). (See (Step C) in FIG. 2). The outer diameter may be ground while measuring the outer diameter with an outer diameter measuring means (so-called in-process). Moreover, although (step C) of FIG. 2 has shown the example which grinds an outer diameter using the plain grindstone TP, you may grind using the angular grindstone TA.

In contrast, conventionally, an inner diameter measuring means is used in addition to the outer diameter measuring means.
Conventionally, as shown in the flowchart of FIG. 4, first, in step S110, based on the outer diameter measured by the outer diameter measuring means, the outer diameter of the cylindrical workpiece W is finish-ground using an outer grindstone. It was.
In step S120, the internal grinding wheel TN is ground by using the internal grinding wheel TN. In step S130, the internal grinding stone TN is temporarily retracted. In step S140, the internal diameter measuring means is inserted to measure the internal diameter, and step S150. In step S160, the inner diameter measuring means was moved backward, and the internal grinding wheel TN was reinserted in step S160, and the shortage of the inner diameter was ground and finished in step S170.
For this reason, an inner diameter measuring means is required, and a long processing time is required for taking in and out the inner diameter measuring means and the internal grinding wheel.

As described above, the grinding method described in the present embodiment does not require an inner diameter measuring means, and does not directly measure the inner diameter, and the outer diameter and the inner diameter are desired in a shorter time than before. It can be finished to the dimension to be.
In the above description, the measuring means capable of measuring the outer diameter of the processing part in-process (during grinding) is used as the outer diameter measuring means. However, when measuring the outer diameter, the processing is temporarily interrupted. The outer diameter may be measured (by so-called post process).

● [Grinding method and processing procedure when grinding the outer end face and inner end face (Figs. 5 and 6)]
Next, an example of a grinding method and a processing procedure when grinding the outer end face and the inner end face of the cylindrical workpiece W will be described with reference to FIGS. 5 and 6. The outer end surface is a surface orthogonal to the outer peripheral surface of the cylindrical workpiece W (an orthogonal surface such as an outer flange portion or an outer step), and the inner end surface is a surface orthogonal to the inner peripheral surface of the cylindrical workpiece W (inner side). Orthogonal planes such as steps). When the outer end surface and the inner end surface are ground, the measuring unit 60 is an (outer) end surface position measuring unit that can measure at least the position in the workpiece rotation axis ZW direction on the outer end surface of the cylindrical workpiece W.

As shown in the flowchart of FIG. 6, first, in step S10A, the control means causes the internal grinding wheel TN to come to the cylindrical workpiece W side so that the third grinding wheel rotation axis ZTN is parallel to the workpiece rotation axis ZW. In this way, the swivel is swung, the swivel is moved relative to the cylindrical workpiece W, and a part of the processing portion of the outer end surface of the cylindrical workpiece W is trial-ground using the end surface of the internal grinding stone TN ( (See (Step A) in FIG. 5).
Then, in step S20A, the control means obtains the position information of the internal grinding stone TN at the time of trial grinding, and obtains the position of the trial ground portion in the workpiece rotation axis ZW direction by measuring the end face position measurement means. To do.

Then, in step S30A, the control means, based on the position information of the internal grinding wheel TN at the time of trial grinding and the end surface position (the position in the workpiece rotation axis direction, that is, the position in the X axis direction) of the trial ground portion, The tip position of the internal grinding wheel TN in the workpiece rotation axis direction is calculated.
For example, as shown in FIG. 5 (step A), the grinder reference position Sstd and the grindstone reference position Tstd are set as described above.
The control means always knows the distance KST in the X-axis direction (workpiece rotation axis direction) from the grinding machine reference position Sstd to the grinding wheel reference position Tstd even when the swivel base is moved. However, the distance KTn in the X-axis direction from the grinding wheel reference position Tstd to the tip of the internal grinding stone TN is unknown.
Here, the position in the X-axis direction of the outer end face of the cylindrical workpiece W is acquired by the end face position measuring means, and the distance in the X-axis direction from the grinding machine reference position Sstd to the outer end face is defined as a distance KWg. . Therefore, the distance KTn = distance KST−distance KWg from the grinding wheel reference position Tstd to the tip of the internal grinding wheel TN in the workpiece rotation axis ZW direction can be calculated.

Next, in step S40A, the control means does not directly measure the inner end face position of the cylindrical workpiece W, but uses the internal grinding wheel TN based on the calculated tip position of the internal grinding stone TN. The inner end face of the workpiece W is ground (see (Step B) in FIG. 5).
For example, as shown in FIG. 5 (step B), the control means controls the position of the grindstone reference position Tstd so that the distance KWn corresponding to the position of the inner end face of the cylindrical workpiece W has a desired value ( The relative position of the swivel is moved). In this case, distance KWn = distance KST−distance KTn.

  Then, in step S50A, the control means turns the swivel so that the outer grinding wheel comes to the cylindrical work W side, moves the swivel relative to the cylindrical work W, and uses the end face position measurement means. Based on the measured position of the outer end surface, the outer end surface including the portion subjected to the trial grinding is ground (grinding so as not to leave a trace of the trial grinding) using an external grinding wheel (see (Step C) in FIG. 5). . The outer end face may be ground while measuring the position of the outer end face by the end face position measuring means (so-called in-process). Moreover, although (step C) of FIG. 5 has shown the example which grinds an outer side end surface using the angular grindstone TA, you may grind using the plain grindstone TP.

As described above, the grinding method described in the present embodiment does not require the end face position measuring means on the inner diameter side, and does not directly measure the position of the inner end face. Thus, the outer end face and the inner end face can be finished so as to have desired positions.
Moreover, in the above description, the measuring means capable of measuring the position of the end face of the processing part in-process (during grinding) is used as the (outer) end face position measuring means. However, when measuring the position of the outer end face, Alternatively, the position of the outer end face may be measured by temporarily interrupting the machining (in a so-called post process).

As described above, when the outer diameter side grinding and the inner diameter side grinding are performed with one workpiece, only the outer diameter measuring means (or end face position measuring means) is used (without measuring the inner diameter side), and the outer diameter and inner diameter ( Or, the initial cost of the grinding machine can be reduced because the dimensions of the outer end face and the inner end face can be managed.
In addition, when grinding the inner diameter side (inner diameter or inner end face), it is not necessary to change the internal grinding wheel TN and the measuring device to measure the inner diameter, so that the processing time can be further shortened.
In addition, when the angular grindstone TA (or the plain grindstone TP or the internal grinding stone TN) is trued, first, while measuring a part of the workpiece (using the truing grindstone) (measuring the diameter or end face position) It can be processed and finished to a desired dimension from the outer diameter dimension (or end face position) of the processing location and the position information of the grindstone.
In addition, by storing the tip position of each grindstone, management of the tip position information of the grindstone is facilitated, and the machining time can be further shortened by minimizing wasteful grinding amount.

The grinding method of the cylindrical workpiece of the present invention is not limited to the method, procedure, and the like described in the present embodiment, and various modifications, additions, and deletions can be made without changing the gist of the present invention.
Further, the positions of the grinder reference position Sstd and the grindstone reference position Tstd are not limited to the positions described in the present embodiment, and can be set to arbitrary positions in the composite grinder 1. .
Further, the cylindrical workpiece grinding method described in the present embodiment is not limited to the composite grinder 1 having the configuration shown in the examples of FIGS. 1A and 1B, but can be applied to composite grinders having various configurations. Can be applied. For example, the outer grindstone may be a single plain grindstone.
In the example of the composite grinder 1 described in the present embodiment, the angular grindstone TA (or the plain grindstone TP or the internal grindstone TN) can be moved with respect to the cylindrical workpiece W in the Z-axis direction. In the X-axis direction, an example in which the cylindrical workpiece W is movable with respect to the angular grindstone TA (or the plain grindstone TP or the internal grinding stone TN) is shown. Any configuration is possible as long as TA (or plain grinding stone TP or internal grinding stone TN) can be moved relatively in the Z-axis direction and X-axis direction (movable on the XZ plane (corresponding to relative movement plane MF)).
In addition, the shape and configuration of the angular grindstone, the plain grindstone, the internal grindstone, and the shape of the cylindrical workpiece W are not limited to those described in the present embodiment.

DESCRIPTION OF SYMBOLS 1 Compound grinder 10 Base 11 Spindle table 12 Swivel base 20 Spindle base 30 Tailstock 60 Measuring means (outer diameter measuring means, end face position measuring means)
TA angular whetstone
TP plain grinding wheel
TN Internal grinding wheel W Cylindrical workpiece ZS Rotating axis ZTA First grinding wheel rotation axis ZTP Second grinding wheel rotation axis ZTN Third grinding wheel rotation axis ZW Work rotation axis

Claims (4)

An outer grinding wheel that can grind the outer diameter of the cylindrical workpiece;
An internal grinding wheel capable of grinding the inner diameter of the cylindrical workpiece,
In the cylindrical workpiece grinding method using a composite grinder provided with an outer diameter measuring means capable of measuring the outer diameter of the cylindrical workpiece,
A part of the outer diameter of the cylindrical workpiece is subjected to trial grinding with the inner grinding wheel to obtain position information of the inner grinding wheel, and the size of the portion subjected to the trial grinding with the outer diameter measuring means is determined. Measuring step,
The position of the tip end in the radial direction of the cylindrical workpiece in the internal grinding wheel based on the positional information of the internal grinding wheel at the time of the trial grinding and the outer diameter of the portion subjected to the trial grinding. A step of obtaining a grinding wheel tip position,
Without directly measuring the inner diameter of the cylindrical workpiece, controlling the position of the inner grinding wheel based on the tip position of the inner grinding wheel to grind the inner diameter of the cylindrical workpiece;
Grinding the outer diameter of the cylindrical workpiece including the trial-ground portion using the outer grinding wheel,
A cylindrical workpiece grinding method comprising: An outer surface that can grind the outer end face that is a surface orthogonal to the radial direction of the outer stepped portion of a cylindrical workpiece having an inner stepped portion with a different inner diameter and an outer stepped portion with a different outer diameter at the outer diameter portion. Whetstone,
An internal grinding stone capable of grinding an inner end face which is a surface orthogonal to the radial direction in the inner stepped portion of the cylindrical workpiece,
Grinding the cylindrical workpiece using a composite grinder comprising: an end surface position measuring unit capable of measuring a position in a workpiece rotation axis direction orthogonal to the radial direction of the cylindrical workpiece on the outer end surface of the cylindrical workpiece. In the method
A part of the processing portion on the outer end surface of the cylindrical workpiece is subjected to trial grinding with the internal grinding wheel to obtain position information of the internal grinding stone, and the workpiece at the location subjected to the trial grinding with the end surface position measuring means. Measuring the position in the direction of the axis of rotation;
The position of the tip of the internal grinding wheel in the direction of the workpiece rotation axis based on the position information of the internal grinding wheel at the time of the trial grinding and the position of the test grinding on the outer end surface in the direction of the workpiece rotation axis. A step of obtaining a grinding wheel tip position,
Without directly measuring the position in the workpiece rotation axis direction on the inner end surface of the cylindrical workpiece, the inner end surface of the cylindrical workpiece is controlled by controlling the position of the inner grinding wheel based on the tip position of the inner polishing wheel. The step of grinding,
Grinding the outer end face of the cylindrical workpiece including the trial-ground portion using the outer grinding wheel,
A cylindrical workpiece grinding method comprising: In the grinding method of the cylindrical workpiece according to claim 1 or 2,
When performing the trial grinding using the internal grinding wheel, using an outer diameter measuring means or an end face position measuring means capable of measuring a processing portion of the cylindrical workpiece while performing the trial grinding.
A cylindrical workpiece grinding method. In the grinding method of the cylindrical workpiece according to claim 1 or 2,
The outer end face measured using the outer diameter measuring means, or the outer end face measured using the outer diameter measuring means when grinding the portion ground by the inner grindstone using the outer grindstone. Based on the position, grinding with the outer grinding wheel,
A cylindrical workpiece grinding method.

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