JP2002283196A - Adaptive grinding method and adaptive grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adaptively grind a columnar unfinished article 10f by a centerless grinding machine CLG so as to properly fit to an inner peripheral surface with the inner peripheral surface of a finished cylinder 9f by improving a centerless grinding technique. SOLUTION: Data by measuring the inner peripheral surface of the finished cylinder 9f by an inner diameter measuring instrument 11 is inputted to an automatic control circuit CPU. The automatic control circuit controls a horizontal turning board 6 of the centerless grinding machine so as to grind and finish and outer peripheral surface properly fitted to the inner peripheral surface of the finished cylinder 9f. In short, a stroke of a lower slide 7 is also controlled. A measured cylinder 9g used as a reference and a column 10h of a finished product ground so as to be adaptive to this cylinder are placed on an adaptive pallet 13, and hold a contrapositive relationship therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer peripheral surface of an individual cylindrical member which is adapted to an inner peripheral surface of a finished cylindrical member so as to be adaptable to the shape and size of the inner peripheral surface. The present invention relates to a method for centerless grinding a surface and an apparatus for performing the above-described grinding method.

[0002]

2. Description of the Related Art FIG. 2 shows a known centerless grinding machine, in which (A) is a plan view and (B) is a front view. The adjusting grindstone 1 supports the columnar workpiece 3 in cooperation with the blade 2 while rotating clockwise as shown by the arrow in the figure. The grinding wheel 4 is moved clockwise as shown by the arrow in the figure,
The workpiece 3 comes into contact with the workpiece 3 while rotating at a peripheral speed greater than the peripheral speed of the workpiece, and is ground while correcting the workpiece 3 to a perfect circle. Adjustment whetstone 1
Is mounted on the upper slide 5 (see FIG. 2B). The horizontal swivel 6 carries the upper slide 5 and the blade 2 and swings around a vertical swing axis (not shown). The horizontal swivel 6 is mounted on a lower slide 7 and is moved in the left-right direction in the figure. (See FIG. 2 (A)) Center line a of grinding wheel 4 and adjustment wheel 1
Is adjusted basically in parallel with the center line b. If the parallelism is deviated, the workpiece 3 is not formed into a right circular cylinder, but is ground into a conical surface. By intentionally changing the parallelism of the center lines a and b,
It is also possible to grind the workpiece 3 into a conical shape. (See FIG. 2B) When the lower slide 7 is moved to the left in the figure, the workpiece 3 approaches the grinding wheel 4, and the finished dimension of the workpiece 3 becomes thin. For this reason, the lower slide 7
The leftward movement of is also referred to as infeed. If the cutting feed is stopped early, the finished dimension of the workpiece 3 becomes large.

[0003]

The centerless grinding machine has a wide range of applications, one of which is "to have a proper clearance for a given cylinder.
Grinding the outer peripheral surface of the columnar member. " There are two methods, one of which is to classify a large number of cylindrical members according to their inner diameter dimensions and shape (for example, taper angle), and for each class to have an appropriate clearance with this. Centerless grinding of the columnar member. Another method is to centerless grind individual cylindrical members against individual cylindrical members. For convenience of explanation, this method will be referred to as adaptive grinding. FIG. 3 is a schematic diagram illustrating a cross section of a cylindrical member drawn by a solid line, and a columnar member adapted to the cylindrical member drawn by a chain line, for explaining various types of adaptive grinding patterns. FIG. 3A shows a case where the cylindrical member is a straight cylinder 9A. In such a case, the columnar member is finished into a right circular column 10A,
The clearances C ₁ , C ₂ , and C _{3 at a} plurality of locations may be equal to each other. Such adaptive grinding technology has already been developed and has produced excellent results.

[0004] However, as shown in FIG.
Is a tapered cylinder 9B, the cylindrical member is a tapered cylinder.
Finished to 10B, clearance C at multiple locations₁,
C₂, C ₃Grinding technology that equalizes
Not established. 3 (C) and 3 (B).
Thus, the tapered cylinder 9C does not have a conical inner peripheral surface.
In the case of a barrel shape, a tapered cylinder 1
The technology for grinding 0C and the tapered cylinder 9D are trumpet-shaped
, The tapered cylinder 10D is adapted to this.
Technology has not been developed yet. The present invention addresses the above situation.
It was done in light of the purpose
For each of a number of cylindrical members
Providing the technology to grind materials with high precision and efficiency
aimed to. However, in the present invention, a cylindrical shape is
The cylindrical shape means a tapered shaft (tapered shaft).
Pillar).

[0005]

The basic principle of the present invention created to achieve the above object will be briefly described below with reference to FIG. 1 corresponding to one embodiment. In other words, the inner diameter of the finished cylinder 9f is measured by the inner diameter measuring device 11 in order to grind and finish the unfinished cylinder so that it can be fitted to the finished cylinder 9f with an appropriate clearance. 9g is a pallet 1
Put on top of 3. On the other hand, the measurement value of the inner diameter measuring device 11 is input to an automatic control circuit CPU12, and the automatic control circuit 12 automatically controls the horizontal turning table 6 of the centerless grinding machine to finish the cylinder 10g by centerless grinding. And
The completed cylinder 10h is put on the matching pallet 13 and paired with the measured cylinder 9g to maintain this pairing relationship.

The method according to the first aspect of the present invention is based on the principle described above, and the outer peripheral surface is ground so that a cylindrical member can be properly fitted to each finished cylindrical member. The method of measuring the inner diameter of the finished cylindrical member, detecting the distribution state of the inner diameter dimension in the axial direction, operating the horizontal turning machine of the centerless grinding machine,
Adjusted to be able to perform the grinding of the taper amount adapted to the above-mentioned inner diameter size distribution state, the cylindrical member that has not finished finishing, the grinding finish by the centerless grinding machine, and the finished cylindrical member It is characterized in that a pair with a cylindrical member that has been subjected to grinding and finishing is held.
According to the method of the present invention described above, the distribution state of the inner diameter in the axial direction of the cylindrical member is detected with reference to the cylindrical member, so that the inner peripheral surface of the cylindrical member is detected. Basic data for calculating the taper amount and the change in the taper can be obtained. By adjusting the horizontal revolving lathe of the centerless grinding machine based on the basic data, the columnar member having the "taper optimally fitted to the cylindrical member" can be subjected to centerless grinding.

According to a second aspect of the present invention, in addition to the constituent elements of the first aspect of the present invention, the horizontal turning machine of the centerless grinding machine is adjusted based on the distribution of the inner diameter of the cylindrical member. At this time, by adjusting the operation of the lower slide of the centerless grinding machine, by controlling the outer diameter of the cylindrical member, the outer diameter of the cylindrical member and the inner peripheral surface of the cylindrical member, and It is characterized in that the amount of taper is adapted comprehensively. When the method of the second aspect described above is applied to the method of the first aspect, not only the taper adjustment but also the diameter dimension adjustment can be performed at the time of the centerless grinding of the cylindrical member. When the tapered cylinder and the tapered shaft are fitted concentrically, the clearance changes if the two are relatively displaced in the axial direction. However, if the relative positions of the two in the axial direction are restricted, a desired clearance cannot be obtained unless the reference diameters of the two are controlled. The method according to the second aspect of the present invention is based on the premise that the cylinder is tapered with respect to the cylinder by the application of the first aspect, and furthermore, the diameter dimension is adjusted by controlling the lower slide of the centerless grinding machine. A tapered fitting state can be obtained.

According to a third aspect of the present invention, in addition to the constituent features of the first or second aspect of the present invention, a measured value of the inner diameter of the cylindrical member is input to an automatic control circuit, The automatic control circuit automatically controls "at least one of the rotation angle position of the horizontal turning table of the centerless grinding machine and the operation of the lower slide". When the above-described invention method of claim 3 is applied to the invention methods of claims 1 and 2, the measured value of the inner diameter of the cylindrical member is input to the automatic control circuit, so a program is given to the automatic control circuit in advance. This makes it possible to automatically control the horizontal swivel of the centerless grinding machine for proper taper adjustment and / or to automatically control the lower slide to perform appropriate diameter adjustment, and furthermore, Adaptive grinding can be performed quickly and without the need for human error.

According to a fourth aspect of the present invention, in addition to the constituent elements of the first or third aspect of the present invention, the cylindrical method is based on the taper amount of the inner peripheral surface of the cylindrical member. The horizontal turning table is controlled such that the taper amount of the outer peripheral surface of the member is equal to the taper amount of the cylindrical member, and in a state where the cylindrical member and the columnar member are fitted concentrically,
Grinding is performed so that the distribution of both clearance dimensions is constant in the axial direction. When the method of the fourth aspect described above is used in combination with the method of the first or third aspect, the machining finish error of the inner peripheral surface of the cylindrical member can be relieved by the adaptive grinding of the cylindrical member. . That is, when a large number of cylindrical members are processed and inspected, even if an inspection rejection product in which the taper angle of the inner peripheral surface is out of an allowable error occurs, a proper cylindrical member to be fitted with the inspection member is appropriately fitted. When the fitting clearance is corrected by giving a taper, the rejected product can be relieved.

The structure of the invention method according to claim 5 is based on the inner diameter of the cylindrical member and the taper amount of the inner peripheral surface in addition to the constituent elements of the invention method according to claim 2 or 3. The horizontal swivel and the lower slide are controlled, and in a state where the cylindrical member and the columnar member are fitted concentrically, the distribution of the clearance dimension between the two becomes constant in the axial direction, and the clearance dimension is reduced. It is characterized in that it is finished by grinding so as to obtain a predetermined value. When the method of the fifth aspect described above is used in combination with the method of the second or third aspect, the cylindrical member is adapted to have an appropriate diameter dimension and an appropriate taper amount with respect to the cylindrical member. By grinding, a processing error on the inner peripheral surface of the cylindrical member can be indirectly corrected and relieved. That is, in the method according to the fourth aspect of the present invention, the taper error of the cylinder is exclusively rescued.
In, one or both of the taper error and the diameter dimensional error can be relieved.

According to a sixth aspect of the present invention, in addition to the constituent features of the second or third aspect of the present invention, the taper angle of the inner peripheral surface of the cylindrical member varies in the axial direction. In this case, the horizontal swivel and the lower slide of the centerless grinding machine are controlled so that the taper amount of the cylindrical member is substantially the same as the average value of the taper of the cylindrical member, and the cylindrical member and the cylindrical member are circularly adjusted. Grinding is performed so that the maximum value of the clearance when the columnar member is fitted concentrically is set to a predetermined value. According to the method of the invention described in claim 6 described above, when the inner peripheral surface of the cylindrical member to be a reference for the grinding finish of the cylindrical member is not conical, for example, has a barrel-shaped rotating arc surface, Adaptive grinding of a cylindrical member to be fitted to this cylindrical member is as follows: The taper amount is the same as the average taper value of the cylindrical member, and b. By regulating the maximum clearance value of the cylindrical member in a state where the columnar member is fitted, an error in the processing finish of the cylindrical member can be relieved. For example, when a fluid device such as a pump or a valve is configured by fitting the cylindrical member and the columnar member, leakage of the working fluid can be controlled by regulating the maximum value of the clearance.

According to a seventh aspect of the present invention, in addition to the constituent features of the second or third aspect of the present invention, the amount of taper of the cylindrical member is not constant, and the shaft of the cylindrical member is not fixed. If the taper angle changes along the center direction,
By controlling the horizontal swivel and the lower slide of the centerless grinding machine, the taper amount of the cylindrical member is substantially equal to the average taper value of the cylindrical member, and the cylindrical member and the cylindrical member are separated from each other. It is characterized in that it is ground so that the minimum value of the clearance when fitted concentrically is set to a predetermined size. According to the above-described method of the present invention, when the inner peripheral surface of the cylindrical member to be a reference for the adaptive grinding is not conical, for example, has a trumpet-shaped rotating arc surface, this cylindrical member The outer peripheral surface shape of the cylindrical member to be fitted to The taper amount is the same as the average taper value of the cylindrical member, and b. By regulating the minimum clearance value in a state where the cylindrical member and the columnar member are fitted to each other, it is possible to relieve an error in the processing finish of the cylindrical member. For example, when the cylindrical member and the columnar member are fitted together to constitute a hydraulic device such as a pump or a valve, the formation of an oil film is ensured by regulating the minimum clearance, thereby preventing seizure of both members. can do.

[0013] The structure of the invention method according to claim 8 is, in addition to the constituent elements of the invention method according to claim 3, that the cylindrical member receives a non-uniform pressure under use conditions to generate distortion or In the case of a member that generates a strain due to a temperature gradient, the measured shape of the inner peripheral surface is input to the automatic control circuit, and the shape of the inner peripheral surface in a state in which the distortion is generated by the automatic control circuit, The dimensions are calculated, and the horizontal revolving machine and the lower slide of the centerless grinding machine are controlled based on the calculated values of the shape and the dimensions. According to the above-described method of the present invention, when the cylindrical member is distorted by an external force or heat under the use condition, the distorted state is calculated and predicted to be adapted to the predicted distortion shape. By grinding and finishing the outer peripheral surface of the columnar member, an appropriate clearance distribution can be exhibited in the operating state. Since the above-mentioned distortion prediction is performed by the automatic control circuit, it can be performed quickly and with high accuracy.

According to a ninth aspect of the present invention, there is provided an inner diameter measuring device (11) for measuring an inner diameter of a cylindrical member at a plurality of positions separated in an axial direction, and the inner diameter measuring device. Automatic control circuit (CP
U), the automatic control circuit has a function of calculating the taper amount of the inner diameter based on the measured values of the inner diameter at a plurality of locations, and the automatic control circuit of the centerless grinding machine based on the calculated taper amount. It has a function of controlling the horizontal swivel. According to the apparatus of the ninth aspect described above, the method of the first aspect can be easily implemented, and the effect thereof can be sufficiently exhibited.

According to a tenth aspect of the present invention, in addition to the constitutional requirements of the ninth aspect of the present invention, the automatic control circuit further comprises: The centerless grinding machine has a function of controlling a horizontal swivel and a lower slide. According to the apparatus of the tenth aspect described above, the method of the second aspect can be easily implemented and its effect can be sufficiently exhibited.

According to an eleventh aspect of the present invention, in addition to the components of the ninth or tenth aspect of the present invention, the inner diameter measuring device has a function of measuring three or more inner diameters. The automatic control circuit has a function of calculating the taper amount of a plurality of sections based on the measured values of the inner diameter of the plurality of locations, and the automatic control circuit includes:
When the taper amounts of a plurality of sections are different from each other, it has a function of calculating an average value of these taper amounts, and controls the horizontal swivel based on the calculated taper amount average value. Features. According to the above-described invention apparatus of claim 11, the invention method of claim 6 and the invention apparatus of claim 7
The present invention method can be easily carried out, and the results can be fully exhibited.

[0017]

FIG. 1 shows an embodiment of the present invention.
It is a systematic diagram drawn typically. CL surrounded by a dotted line
G is a device similar to the known centerless grinding machine previously shown in FIG. 2, and is shown in two views as in FIG. An unfinished columnar member 10f is adaptively ground so as to be in a suitable fitting state with the finished cylinder 9f (to be described in detail below). The finished cylinder 9f has an error in the finishing, and its inner peripheral surface is slightly tapered. The finished cylinder 9f is conveyed to the circular diameter measuring device 11 (arrow d).
The inner diameter at a plurality of locations in the axial direction is measured. The measured cylinder 9g for which the inner diameter measurement has been completed is conveyed as indicated by an arrow e and placed on the matching pallet 13. This compatible pallet temporarily stores a pair of a cylindrical member that has become the standard for compatible grinding and a completed cylindrical member that has become a work for adaptive grinding, and holds the pair of both members. It is a container for carrying out. The measurement value measured by the inner diameter measuring device 11 is input to the automatic control circuit CPU as indicated by an arrow f. In the present embodiment, the automatic control circuit is constituted by a microcomputer. The automatic control circuit calculates the shape and size (particularly, the taper amount and the reference value of the inner diameter) of the inner peripheral surface of the finished cylinder 9f based on the plurality of input measured values of the inner diameter, that is, the distribution state of the inner diameter. And in accordance with the program given in advance, "the shape and dimensions of the cylindrical member adapted to the inner peripheral surface"
Is calculated. The automatic control circuit CPU controls the centerless grinding machine CLG to grind the shape and dimensions of the columnar member. Specific details of the control will be described later with reference to FIG.
In the embodiment of FIG. 1, a control command (arrow g) is given to the horizontal turning table 6. Although not shown, a control command can be given to the lower slide 7.

The unfinished columnar member 10f is conveyed as indicated by an arrow h and is mounted on a centerless grinding machine and ground. Reference numeral 10g denotes a cylindrical member being ground. In the embodiment of FIG. 1, the horizontal turntable 6 is adjusted so that the center line b of the adjusting grindstone 1 is inclined with respect to the center line a of the grinding grindstone 4, and the cylinder to be ground 10 g is tapered. Finished. Although not shown in FIG. 1, the automatic control circuit CPU
When the working stroke of the lower slide 7 is adjusted by adjusting the stroke length (specifically, by adjusting the stroke end of the cutting feed to the left in the figure), the diameter dimension of the cylinder 10g to be ground is controlled. In the case where the outer peripheral surface of the columnar member is tapered and formed in a conical shape, the expression of the diameter is not simple, but for example, it is appropriately expressed by the diameter of a cross-sectional circle at the center in the axial center direction of the tapered surface. It should be set to
As described above, the columnar member (finished product) 10h that has been ground by the centerless grinding machine CLG automatically controlled by the automatic control circuit CPU is unloaded as indicated by the arrow i, and placed on the compatible pallet 13. Can be In this way, the measured cylinder 9g, which is the reference for the adaptive grinding, and the finished cylindrical member 10h, which is the object to be ground for the adaptive grinding, form a pair, and are carried out while holding this pair. That is, a combination of the cylinder 9g and the cylinder 10h is a product, and these are assembled with each other and provided for use. A specific example of the adaptive grinding method performed using the adaptive grinding device shown in FIG. 1 will be described below.

(See also FIG. 1 and FIG. 3 (B).) Based on the measured values D ₁ , D ₂ , D ₃ of the inner diameter measuring device 11, the automatic control circuit CPU determines the shape of the inner peripheral surface of the cylindrical member. As a result of calculating the dimensions, when the inner peripheral surface of the cylindrical member indicated by reference numeral 9B is a conical surface, the clearance C at a plurality of locations is determined.
_In order to perform suitable grinding so that ₁ , C ₂ , and C ₃ are equal to each other, that is, the clearance distribution is uniform, the shape of the cylindrical member is changed to “the tapered cylinder 9B” like a tapered cylinder 10B drawn by an imaginary line. Is ground so as to have a taper angle equal to the taper angle of the above. In this case, the tapered cylinder 9
Assume that B and the tapered cylinder 10B are fitted concentrically. If both members are concentric and can be relatively displaced in the left-right direction in the figure, C ₁ = C ₂ =
A goal is adapted grinding the C _3, the absolute value of the clearance _{C 1,} C 2, _{C 3} does not matter. Under such conditions, it is sufficient to adjust the horizontal swivel 6 to control the taper angle of the tapered cylinder 10B, and no special adjustment is required for the lower slide 7.

FIGS. 1 and 3B similarly to the preceding paragraph 0019.
With reference to the above, the conditions in the previous paragraph 0019 are changed and considered. That is, considering that the position of the concentrically fitted tapered cylinder 9B and tapered cylinder 10B in the axial direction (the left-right direction in the figure) is restricted under some conditions, C ₁ = C ₂ = not only a _{C 3,} C _1,
The absolute values of C ₂ and C ₃ must also be regulated. In such a case, the inner diameters D ₁ , D ₂ , D of the tapered cylinder 9B
₃ , the stroke end position of the lower slide 7 is adjusted to control the diameter of the tapered cylinder 10B.
When the diameter of the tapered cylinder 10B is controlled as described above, the automatic control circuit CPU is configured to have a “function of controlling the lower slide 7 based on the measurement value of the inner diameter measuring device 11”.

As a result of analyzing the measured values of the inner diameter at three or more places by the inner diameter measuring device 11 of FIG. 1 with the automatic control circuit CPU,
As shown in FIG. 3C, the inner peripheral surface of the tapered cylinder 9C may not be an accurate cone, but may be a barrel-shaped rotating arc surface. The term "arc" in the above-mentioned rotating arc surface does not mean a strictly geometric arc but a curve that can be approximately regarded as an arc. The condition of the columnar member to be properly fitted to the tapered cylinder 9C is as follows:
As shown by the virtual line 10C, b. B. A uniform taper angle equal to the average taper angle of the barrel-shaped tapered cylinder; The maximum clearance Cmax is a tapered cylinder (10C) having a predetermined value. The matching conditions (a) and (b) are those in the present embodiment, and these conditions can be modified and implemented. In (1) and 3 (C), the taper amount is increased and the radius of curvature of the arc is reduced to facilitate reading. The real thing looks like a true cylinder only visually. (2) The reason why the tapered cylinder 10C is not formed into a rotating arc surface but is given a uniform taper angle (conical surface), although the inner peripheral surface of the tapered cylinder 9C is formed into a rotating arc surface, is that grinding in a centerless grinding machine is performed. Depends on the finishing process. In other words, in centerless grinding, it is relatively easy to "grind and finish a cylindrical member with a desired taper angle", but it is not possible to "grind and finish a cylindrical member with a desired vertical cross-section arc". Not very time-consuming,
Processing costs are high.

In order to fit the barrel-shaped tapered cylinder 9C shown in FIG.
(See FIG. 1) The inner diameter measuring device 11 measures the inner diameter of at least three (preferably five or more) of the tapered cylinder 9C, calculates the shape of the rotating arc surface by the automatic control circuit CPU, and sets the automatic control circuit. The CPU calculates an average taper angle of the rotating arc surface, controls the horizontal turning table according to the calculated average taper angle value, and controls the lower slide 7 so as to obtain a desired maximum clearance Cmax. The member 10g is subjected to centerless grinding. By setting the maximum clearance Cmax to a predetermined value in this way, it is possible to regulate, for example, the amount of leakage in a fluid device.

The embodiment of FIG. 3D is similar to the above-described embodiment of FIG.
The inner peripheral surface of D forms a trumpet-shaped rotating arc surface. In such a case, an appropriate tapered cylinder (10D) is: Has a uniform taper angle equal to the average taper amount of the trumpet-shaped tapered cylinder; The minimum clearance Cmin is a tapered cylinder (10D) having a predetermined dimension. Such a tapered cylinder 10D
The procedure for centerless grinding and finishing is basically the same as the procedure for centerless grinding and finishing the tapered cylinder 10C. It should be noted that the tapered cylinder 10C shown in FIG.
In the case of centerless grinding of the tapered cylinder 10D of (D), since the taper angle and the diameter dimension cannot be strictly theoretical values, as a practical matter, the grinding is performed so as to be within an allowable error range. .

Next, an application example of the embodiment described with reference to FIGS. 3C and 3D will be described. In the above-described embodiment, the measured value of the inner diameter measuring device 11 of FIG.
By analyzing with the PU, it was detected that the finished shape was distorted in the shape of a rotating arc surface. However, as a different problem, there are the following cases. That is, although the finished shape and dimensions of the cylindrical member are accurate, the cylindrical member may be elastically deformed by receiving an uneven internal pressure in a state in which an apparatus using the cylindrical member is operated. In addition, there may be a case where unevenness in thermal expansion and contraction occurs due to a thermal gradient and distortion occurs. In such a case, how the cylindrical member is distorted in accordance with the operating conditions is previously calculated or experimentally grasped, and this is stored as a program in the automatic control circuit CPU (FIG. 1). Give it. The automatic control circuit CPU to which the actual measurement value measured by the inner diameter measuring device 11 is inputted (arrow f) adds an external force strain and a thermal strain to the processed finish shape and the size of the cylindrical member, and the shape and the size during the operation. And calculating the shape and dimensions of the tapered cylinder conforming to the calculated values of the shape and dimensions, and controlling at least one of the horizontal swivel 6 and the lower slide 7 based on the calculated values of the tapered cylinder shape and dimensions, Perform suitable grinding.

[0025]

As described above, according to the first embodiment of the present invention, the structure and function of the present invention are clarified. Since the distribution state of the inner diameter dimension in the direction of the center is detected, the basic data for calculating the taper amount of the inner peripheral surface of the cylindrical member and the change in the taper can be obtained. By adjusting the horizontal revolving lathe of the centerless grinding machine based on the basic data, the columnar member having the "taper optimally fitted to the cylindrical member" can be subjected to centerless grinding. When the method according to the second aspect is applied to the method according to the first aspect of the invention, not only the taper adjustment but also the diameter dimension adjustment can be performed at the time of the centerless grinding of the cylindrical member. When the tapered cylinder and the tapered shaft are fitted concentrically, the clearance changes if the two are relatively displaced in the axial direction. However, if the relative positions of the two in the axial direction are restricted, a desired clearance cannot be obtained unless the reference diameters of the two are controlled.
The method according to the second aspect of the present invention is based on the premise that the cylinder is tapered with respect to the cylinder by the application of the first aspect, and furthermore, the diameter dimension is adjusted by controlling the lower slide of the centerless grinding machine. A tapered fitting state can be obtained.

When the method according to the third aspect is applied to the method according to the first or second aspect, the measured value of the inner diameter of the cylindrical member is input to the automatic control circuit. This enables automatic control of the horizontal swivel of the centerless grinding machine for proper taper alignment, and / or automatic control of the lower slide for proper diameter dimension adjustment. Adaptive grinding can be performed quickly and without the need for human error.

When the method according to the fourth aspect is used in combination with the method according to the first or third aspect, an error in machining finish on the inner peripheral surface of the cylindrical member can be relieved by adaptive grinding of the cylindrical member. That is, when a large number of cylindrical members are processed and inspected, even if an inspection rejection product in which the taper angle of the inner peripheral surface is out of an allowable error occurs, a proper cylindrical member to be fitted with the inspection member is appropriately fitted. When the fitting clearance is corrected by giving a taper, the rejected product can be relieved. The method of claim 5 is applied to claim 2 or claim 3.
When used together with the method of the invention, the cylindrical member is used as a reference, the cylindrical member is given an appropriate diameter dimension and an appropriate taper amount and is appropriately ground, thereby indirectly processing errors in the inner peripheral surface of the cylindrical member. It can be corrected and remedy. That is, while the taper error of the cylinder is exclusively relieved in the method of the fourth aspect of the invention, one or both of the taper error and the diameter dimension error can be relieved in the fifth aspect.

According to the method of the present invention, when the inner peripheral surface of the cylindrical member, which is to be a reference for the grinding and finishing of the cylindrical member, is not conical but has a barrel-shaped rotating arc surface, for example, Adaptive grinding of a cylindrical member fitted to a cylindrical member is as follows: The taper amount is the same as the average taper value of the cylindrical member, and b. By regulating the maximum clearance value in a state where the cylindrical member is fitted to the cylindrical member, it is possible to relieve an error in the finishing of the cylindrical member. For example, when a fluid device such as a pump or a valve is configured by fitting the cylindrical member and the columnar member, leakage of the working fluid can be controlled by regulating the maximum value of the clearance. Further, according to the method of the present invention, when the inner peripheral surface of the cylindrical member to be a reference for the adaptive grinding is not conical but has, for example, a trumpet-shaped rotating arc surface, the cylindrical member is fitted to the cylindrical member. The outer peripheral surface shape of the cylindrical member to be fitted is as follows: The taper amount is the same as the average taper value of the cylindrical member, and b. By regulating the minimum clearance value in a state where the cylindrical member and the columnar member are fitted to each other, it is possible to relieve an error in the finishing of the cylindrical member. For example, when the cylindrical member and the columnar member are fitted together to constitute a hydraulic device such as a pump or a valve, the formation of an oil film is ensured by regulating the minimum clearance to prevent seizure of both members. can do.

According to the method of the present invention, when the cylindrical member is distorted due to an external force or heat under the use condition, the distorted state is calculated and predicted to be adapted to the predicted distortion shape. By grinding and finishing the outer peripheral surface of the columnar member, an appropriate clearance distribution can be exhibited in the operating state. In addition, since the above-described distortion prediction is performed by the automatic control circuit, it can be performed quickly and with high accuracy.

According to the ninth aspect of the present invention, the first aspect of the present invention is provided.
According to the invention apparatus of claim 10, the invention method of claim 2 is easily implemented according to the invention apparatus of claim 10, and according to the invention apparatus of claim 11, the invention methods of claims 6 and 7 are easily implemented. The effect can be fully exhibited.

[Brief description of the drawings]

FIG. 1 is a system diagram schematically illustrating an embodiment of the present invention device.

FIG. 2 shows a known centerless grinding machine, wherein (A) is a plan view and (B) is a front view.

FIG. 3 is a schematic diagram showing various suitable grinding patterns, in which a cross section of a cylindrical member is drawn by a solid line, and a columnar member conforming thereto is drawn by a chain line.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Adjustment grindstone, 2 ... Blade, 3 ... Workpiece, 4 ... Grinding grindstone, 5 ... Upper slide, 6 ... Horizontal revolver, 7 ... Lower slide, 8 ... Bed, 9 ... Cylindrical member, 10 ... Column shape Member, 11: inner diameter measuring machine, 12: automatic control circuit, 13: compatible pallet.

Continued on the front page (72) Inventor Yoshihiro Minagawa 578-2 Zao Ueno, Yamagata City, Yamagata Prefecture Inside (2) Micron Precision Co., Ltd. (72) Inventor Teruhisa Ono 578-2 Zao Ueno, Yamagata City, Yamagata Prefecture Micron Precision Co., Ltd. F-term (reference)

Claims (11)

[Claims] 1. A method of grinding an outer peripheral surface of a finished cylindrical member so that a cylindrical member is fitted properly, wherein an inner diameter of the finished cylindrical member is measured. Then, the distribution state of the inner diameter in the axial direction is detected, and the horizontal revolving lathe of the centerless grinding machine is adjusted to an adjustment state capable of performing the grinding of the taper amount adapted to the above inner diameter distribution, A columnar member that has not been finished is ground and finished by the centerless grinding machine, and the pair of a cylindrical member that has been finished and a cylindrical member that has been ground and finished in conformity with the cylindrical member is retained. And suitable grinding method. 2. When adjusting the horizontal turning table of the centerless grinding machine based on the state of the inner diameter distribution of the cylindrical member, the operation of the lower slide of the centerless grinding machine is also adjusted so that the outer periphery of the cylindrical member is adjusted. The adaptive grinding method according to claim 1, wherein the outer diameter and the taper amount of the cylindrical member are comprehensively adjusted to the inner peripheral surface of the cylindrical member by controlling the diameter. . 3. A measurement value of the inner diameter of the cylindrical member is input to an automatic control circuit, and the automatic control circuit determines the rotation angle position of the horizontal revolving wheel of the centerless grinding machine and the operation of the lower slide. 3. The adaptive grinding method according to claim 1, wherein at least one of them is automatically controlled. 4. A horizontal turntable is controlled such that a taper amount of an outer peripheral surface of the cylindrical member is equal to a taper amount of the cylindrical member based on a taper amount of an inner peripheral surface of the cylindrical member, In a state where the cylindrical member and the columnar member are fitted concentrically, grinding is performed so that the distribution of the clearance dimension between the two is constant in the axial direction. An adaptive grinding method according to claim 3. 5. A horizontal swivel and a lower slide are controlled on the basis of an inner diameter of the cylindrical member and a taper amount of an inner peripheral surface, and the cylindrical member and the columnar member are concentrically fitted. The feature is that the distribution of the clearance dimension between the two becomes constant in the axial direction, and that the clearance dimension is ground to a predetermined value.
The adaptive grinding method according to claim 2 or 3. 6. When the amount of taper of the cylindrical member is not constant and the taper angle changes along the axial direction of the cylindrical member, the horizontal turning machine and the lower slide of the centerless grinding machine are controlled. Then, the amount of taper of the cylindrical member is substantially the same as the average value of the taper of the cylindrical member, and the maximum value of the clearance when the cylindrical member and the cylindrical member are fitted concentrically. The method according to claim 2 or 3, wherein the grinding is performed so as to have a predetermined size. 7. When the amount of taper of the cylindrical member is not constant and the taper angle changes along the axial direction of the cylindrical member, the horizontal swivel and the lower slide of the centerless grinding machine are controlled. Then, the amount of taper of the cylindrical member is substantially the same as the average value of the taper of the cylindrical member, and the minimum value of the clearance when the cylindrical member and the cylindrical member are fitted concentrically. The method according to claim 2 or 3, wherein the grinding is performed so as to have a predetermined size. 8. When the cylindrical member is a member that undergoes distortion due to uneven pressure under a use condition or distortion due to a temperature gradient, the shape of the measured inner peripheral surface is changed. Input to the automatic control circuit,
The automatic control circuit calculates the shape and dimensions of the inner peripheral surface in a state where distortion has occurred, and controls the horizontal revolving machine and the lower slide of the centerless grinding machine based on the calculated values of the shapes and dimensions. The adaptive grinding method according to claim 3, characterized in that: 9. An inner diameter measuring device (11) for measuring an inner diameter of a cylindrical member at a plurality of locations separated in an axial direction, and an automatic control circuit (CPU) to which a measured value by the inner diameter measuring device is inputted. The automatic control circuit has a function of calculating the taper amount of the inner diameter based on the measured values of the inner diameter at a plurality of locations, and
An adaptive grinding apparatus having a function of controlling a horizontal turning table of a centerless grinding machine based on a calculated taper amount. 10. The automatic control circuit has a function of controlling a horizontal swivel and a lower slide of a centerless grinding machine based on an input measured inner diameter value and a calculated taper amount. The adaptive grinding device according to claim 9, wherein: 11. The inner diameter measuring device has a function of measuring three or more inner diameters, and the automatic control circuit calculates a taper amount of a plurality of sections based on the measured values of the inner diameters of the plurality of positions. And the automatic control circuit has a function of calculating an average value of the taper amounts when the taper amounts of a plurality of sections are different from each other, and the calculated taper amount The adaptive grinding device according to claim 9 or 10, wherein the horizontal turning machine is controlled based on the average value.