JP5538647B2 - Method and apparatus for phasing eccentric workpiece, and method and apparatus for supplying workpiece to cylindrical grinder using the same - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eccentric workpiece phasing method and apparatus, and a workpiece supply method and apparatus to a cylindrical grinder using the same in a cylindrical grinder for grinding an eccentric part outline of an eccentric workpiece. It is.

In a cylindrical grinding machine that grinds the outer shape of the eccentric part of the eccentric work, the eccentric part is processed with the shaft part of the eccentric work fixed by the chuck device. In general, the machining process is started after phase setting.
Conventionally, the eccentric part is centered and phased by rotating the eccentric part slightly by applying a U-shaped jig or horseshoe-shaped jig to the eccentric part and mechanically pressing it. And phased out. (See columns (0002) to (0006) of Patent Document 1)

On the other hand, as a method of automatically centering and phasing the eccentric part of the eccentric workpiece, the distance between the two contact parts perpendicular to the eccentric direction from the spindle center of the cylindrical grinding machine is measured. Rotate the workpiece axis so that the difference does not exceed the specified threshold, and align the center of the eccentric part of the eccentric workpiece with the spindle axis of the cylindrical grinding machine. What to do is proposed. (See columns (0007) to (0019) of Patent Document 1)
Furthermore, as a method of measuring the concentricity / coaxiality of a coaxial work, the concentricity can be calculated from the distance of each central coordinate by rotating the work and obtaining displacement data of the outer circumference of two locations using a contact sensor. A method of calculating is known. (See Patent Document 2)

Japanese Patent Laid-Open No. 5-245541 JP-A-57-187610

  For a workpiece having an eccentric portion, a U-shaped or horseshoe-shaped positioning jig as in Patent Document 1 is brought into contact with the workpiece in centering and phasing when the eccentric portion of a cylindrical grinder is ground. In a structure in which phase alignment is performed in an automatic manner, variations in centering and phase alignment occur due to variations in the workpiece diameter and the state of the surface in contact with the jig. Further, since the adjustment position of the positioning jig needs to be finely adjusted, skill is required for the adjustment work, and the phasing accuracy in the cylindrical grinder is poor, resulting in a defect that the processed surface is left behind. For this reason, by increasing the machining allowance of the machining surface in the rough machining process of the eccentric part, the allowable angle for phasing was widened to eliminate defects in the machining surface during grinding. There is a problem that the processing time increases due to the increase in the number of lines, and the cycle time of the line increases.

  Further, in the measurement type phase adjusting method using a measuring instrument provided in the grinding machine as in Patent Document 1, a new centering mechanism must be provided in the cylindrical grinding machine, and the spindle center of the cylindrical grinding machine is also provided. The centering mechanism swings around due to the misalignment of the centering mechanism and the shape of the surface that the contact makes contact with, resulting in a decrease in measurement accuracy and variations in the phase alignment angle, as well as workpiece damage and contact wear due to the contact. There was a problem of deterioration in measurement accuracy. In addition, since a phase out mechanism is added to the cylindrical grinder, it cannot be handled if there is no space in the grinder, and the cycle time of the equipment increases due to an increase in the phase out time in the cylindrical grinder. there were.

  On the other hand, in the method of obtaining the coaxiality of the measurement location from the maximum value and the minimum value with a contact sensor as in Patent Document 2, the measurement accuracy decreases due to the occurrence of noise near the maximum value and the minimum value, If the roundness near the minimum value is poor, the detection angle will be shifted and the measurement accuracy will be reduced. In addition, to obtain the maximum and minimum values for the entire circumference of the measurement location, 1 There was a problem that it was necessary to rotate and cycle time increased.

The present invention has been made to solve the above-described problems, and can phase out with high accuracy even if the surface roughness and roundness of the object to be measured are poor, and there is a space for installing a phase out mechanism in the cylindrical grinding machine. The present invention provides a phasing method and apparatus for an eccentric workpiece that can be phased without increasing the cycle time of a cylindrical grinding machine.
In addition, the present invention provides the above-described phase shifter in a pre-process of the cylindrical grinder, and gives a degree of freedom between the gripping portion and the fixed portion by a spring or the like to the transport portion of the phase shifter and the cylindrical grinder. Provided with a workpiece feeding method to a cylindrical grinder and its apparatus, which can be transferred to a cylindrical grinder while maintaining the posture determined by the phase shifter, and can be operated while maintaining the same posture. It is.

The eccentric workpiece phasing method according to the present invention is a method of phasing the eccentric portion before grinding the eccentric workpiece, wherein the eccentric workpiece is gripped by a chuck having a rotating portion, and the eccentric workpiece is In which the displacement of the eccentric part of the workpiece corresponding to the rotation angle is measured in a non-contact manner while rotating the angle, and the phase displacement amount of the eccentric part is calculated by trigonometric approximation of the measured displacement data . When measuring the displacement of the eccentric part of the workpiece, the displacement of the bearing part of the workpiece is also measured without contact, and the eccentric part is subtracted from the measured displacement data of the eccentric part. This is characterized in that the workpiece swing component is canceled from the measured data .

The eccentric workpiece phase-shifting device according to the present invention is an eccentric workpiece phase-shifting device that phase-shifts an eccentric workpiece having an eccentric portion and a bearing portion before grinding. A non-contact displacement sensor provided to face the bearing part and the bearing part, a chuck that rotates while gripping one end of the eccentric workpiece, and a rotation angle by the non-contact sensor while rotating the eccentric workpiece. A controller for calculating the phase shift amount of the eccentric part by inputting the eccentric part displacement and the bearing part displacement measured according to the above, approximating the measured displacement data by a trigonometric function,
Eccentric displacement data X (θ)
X (θ) = A (θ) −α × B (θ) (0 ≦ α ≦ 1)
Where A (θ) is the displacement of the eccentric part, B (θ) is the displacement of the bearing part, α weighting coefficient
It is characterized in that it is obtained by.

  According to the present invention, the displacement of the eccentric part and the bearing part while rotating the eccentric work is achieved by the non-contact displacement sensor provided in the eccentric part and the bearing part and the mechanism that rotates while holding the eccentric work. Measurement object by subtracting the amount of displacement and subtracting the displacement component, and further by interpolating a portion near the eccentric part of the measured data with an approximate curve to obtain the phase of the eccentric part Even if the surface roughness and roundness of the cylinder are poor, phase alignment can be performed with high accuracy, and there is no need for a space for installing a phase alignment mechanism in the cylindrical grinder, and phase alignment can be performed without increasing the cycle time of the cylindrical grinder. This is an effect that can be achieved.

  Further, according to the present invention, the phase adjusting device is installed in the previous process of the cylindrical grinder, and the conveying portion of the phase adjusting device and the cylindrical grinder is provided with a degree of freedom between the gripping portion and the fixed portion by a spring or the like. Because it can be transferred to a cylindrical grinder while maintaining the posture determined by the phase shifter, there is no need to install a phase shift mechanism on the cylindrical grinder, and the cycle time of the cylindrical grinder is increased. There is an effect that phase can be obtained with high accuracy.

It is the schematic which shows the phase-shift apparatus by Embodiment 1 of this invention. It is a figure which shows the relationship between the measurement part of the said phase shifter, and a measurement system. It is an operation | movement flowchart explaining the measurement operation | movement by the said phase shifter. It is operation explanatory drawing of the positioning mechanism in the said measurement operation | movement. It is operation | movement explanatory drawing of the chuck apparatus in the said measurement operation | movement. It is a figure which shows the measurement data of the said phase shifter. It is the schematic explaining the delivery operation | movement with the conveying apparatus by Embodiment 2 of this invention and a conveying apparatus and a cylindrical grinder. It is the schematic which shows the processing line from the phase-shift apparatus by Embodiment 3 of this invention to a cylindrical grinding machine. It is a figure explaining an example of the measuring method of the phase shift amount of the eccentric part in the cylindrical grinding machine by Embodiment 4 of this invention. It is a figure explaining the other example of the measuring method of the phase shift amount of the eccentric part in the cylindrical grinding machine by Embodiment 4 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram of a phase shifter 40 according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing a relationship between a measurement part of the phase shifter 40 and a measurement system.
In FIG. 1, the eccentric work 1 is placed on a support portion 2 installed on a pedestal 9 provided on a gantry 8. A non-contact displacement sensor 3 is installed at a position on the pedestal 9. One end of the workpiece 1 is rotated by the rotating mechanism 6 while being held by the chuck 5. The positioning mechanism 4 is a mechanism that is provided above the eccentric work 1 so as to be movable up and down, and mechanically positions the eccentric direction of the eccentric work 1 approximately mechanically.

  In FIG. 2, when the rotation mechanism 6 is rotated by the drive controller 11 with one end of the eccentric work 1 having the eccentric portion 1a and the bearing portion 1b held by the chuck 5, the eccentric portion 1a and the bearing portion 1b are rotated. Measurement signals are output from the non-contact displacement sensors 3a and 3b provided opposite to each other, converted into digital signals by the AD converter 10, and sent to the control device 13 including a personal computer or the like for performing predetermined calculation processing. . At that time, the signal output from the rotary encoder 7 for detecting the rotation angle is converted into a pulse signal by the counter 12 and sent to the control device 13 in the same manner.

  Next, an operation flow for measurement by the phase shifter 40 will be described with reference to FIG. First, the type for phase out is selected, and the position of the sensor 3 is automatically changed according to the diameter of the eccentric portion and the eccentric amount (step 100). Next, after the workpiece 1 is supplied to the phase shifter (step 101), positioning in the workpiece axis direction (step 102) and provisional phasing of the displacement of the eccentric portion (step 103) are performed. Next, the workpiece 1 is gripped by the chuck 5 having a rotating portion (step 104), the workpiece 1 is rotated (step 105), and the displacement of the eccentric portion and the bearing portion corresponding to the rotation angle is measured (step 106). ), The rotation is continued until the set rotation range is measured (step 107). When all the set ranges have been measured, the phase of the eccentric part is calculated using the calculation algorithm from the displacement data with respect to the angle (step 108), and the calculated phase and the preset offset value (explained later) are calculated. After rotating the workpiece to the matched phase (step 109), the workpiece is unloaded by the transfer device (step 110).

  4 and 5 are detailed explanations of the operation of the positioning mechanism 4 and the chuck 5 in the above measurement operation. FIG. 4 is a view of the eccentric work 1 seen from the long axis direction. FIG. 5 is a chuck claw when gripping the work. It is a figure which shows the phase relationship of 5a-5c. In step 101 of FIG. 3, after the work 1 is transferred from the previous process onto the support portion 2, the positioning mechanism 4 made of a V-shaped plate is lowered to limit the rotation range for measuring the displacement. Contact the eccentric part 1a of the workpiece 1 and mechanically determine the approximate eccentric direction of the workpiece 1 (centering). As shown in FIG. 4A, for example, the center of the V-shaped plate 4a and the center of the bearing portion 1b of the workpiece are aligned and the V-shaped plate 4a is applied to the eccentric portion 1a. Thus, the eccentric direction of the eccentric portion 1a can be rotated vertically downward (clockwise). The positioning mechanism 4 is formed so as to be movable in the vertical direction. However, a retracting mechanism may be provided in the front-rear direction (backward direction in FIG. 1) in consideration of interference with the transport device.

  Next, at step 104, the chuck 5 (three-jaw chuck in this case) on the phase adjusting device side advances in the direction of the workpiece 1 and chucks one end of the workpiece 1. At this time, in order to reduce the influence factor of the run-out during rotation, the chuck 5 is lifted by several millimeters from the support portion when chucked as shown in FIG. 2, and the chuck 5 is rotated when the workpiece 1 is rotated in the chucked state. The height of the support portion 2 and the height of the chuck are adjusted so that the workpiece does not come into contact with other places.

  FIG. 5 shows the phase relationship between the workpiece 1 and the chuck 5 when chucking the workpiece, and is a cross-sectional view of the eccentric workpiece 1 as seen from the long axis direction. As shown in FIG. 5 (a), when the chuck 5c of the chuck 5 is displaced with respect to the vertical downward direction (arrow) of the eccentric workpiece 1 when chucking, the workpiece is chucked at the position vertically below when the workpiece is chucked. Since the workpiece is not supported, the workpiece falls downward due to its own weight, and the swinging of the chuck per piece increases when the workpiece rotates.

Therefore, when chucking the workpiece, the chuck claw 5b is arranged vertically downward as shown in FIG. 5B to perform chucking, so that the workpiece can be prevented from falling down and swinging of the workpiece can be suppressed. The arrangement of the vertically downward chuck claws is not limited to the case where there are three chuck claws, but is the same even when the number of claws is four, five or more.
Further, the shape of the portion of the chuck claw that comes into contact with the workpiece is set to an R shape along the outer diameter of the workpiece to be chucked as shown in FIG. Can be suppressed from wobbling within the R-shaped range of the chuck, so that it is possible to suppress the swinging of the workpiece during rotation.

Next, in steps 105 and 106, when the workpiece is set and the workpiece is rotated about a half circumference around the eccentric portion, the displacement between the eccentric portion and the bearing portion is measured by the non-contact type displacement sensors 3a and 3b. The measurement data is shown in FIG. The displacement 15 of the eccentric part and the displacement 19 of the bearing part are measured for each rotation angle of the workpiece, and the rotation angle is plotted on the horizontal axis and the displacement is plotted on the vertical axis.
As described in FIG. 2, when measuring the displacement of the eccentric portion and the bearing portion, a pulse corresponding to the rotation angle is output from a sensor 7 such as a rotary encoder that detects the rotation phase attached to the rotation mechanism, and this rotation The pulse is taken into a digital counter 12 that outputs a trigger signal at every constant count, and the trigger signal is output to a control device 13 such as a personal computer. Once taken into a device such as a digital counter, the trigger interval can be changed arbitrarily. By taking it in accordance with the measurement speed and measurement accuracy, the measurement accuracy and speed are optimized to reduce the equipment cycle time. Can be shortened.

When the control device 13 receives the trigger signal, for example, a board capable of simultaneously sampling a plurality of points such as a multi-ADC, the displacement A (θ) of the eccentric portion indicated by 15 and the displacement of the bearing portion indicated by 19 By taking B (θ) and storing them, displacement data of the eccentric portion and the bearing portion can be obtained for each arbitrary angle pitch.
Based on the displacement data A (θ) of the eccentric portion obtained here, the phase in the eccentric direction is calculated to obtain the phase of the eccentric portion. When calculating the phase of the eccentric part, the point where the displacement is the smallest in the measurement data may be used as the phase of the eccentric part, but the phase of the eccentric part can be accurately controlled by suppressing the influence of noise and disturbance of the measurement data or angular resolution. In order to obtain it, an approximation operation such as trigonometric function approximation is used.

Specifically, the displacement Y = A (θ) of the eccentric portion obtained by measurement is approximated by a trigonometric function and converted into the following equation (1), and the obtained F is the phase shift amount.
Y = D · sinE (X−F) + G (1)
However, D, E, F, and G show the numerical value obtained from the calculation result.
Further, when measuring an eccentric portion that rotates using an eddy current sensor as the non-contact type displacement sensor 3, if the distance from the sensor 3 is increased due to the measurement principle of the sensor 3, a dotted line 17a in FIG. The measured displacement is increased, the consistency with the trigonometric function is deteriorated, and the calculation accuracy is deteriorated. Therefore, by setting the arbitrary height 20 and approximating with the approximate curve 17 of the trigonometric function using data less than the arbitrary height, the reproducibility of the calculation result is improved, and the dispersion of the calculation result can be suppressed and high accuracy is achieved. The phase can be obtained.

In addition, even when the workpiece swing prevention is performed as described in FIG. 5, when the workpiece is chucked, the workpiece is rotated due to a positional deviation between the chuck and the workpiece or a deviation between the chuck center and the rotation center. Sometimes, a slight swing occurs, and the displacement of the swing is added to the measurement data relating to the displacement of the eccentric portion. If the data is used when calculating the phase of the eccentric portion, a deviation may occur between the calculation result and the actual eccentric direction, and phase output accuracy may be reduced. Therefore, by subtracting the displacement B (θ) of the bearing portion from the displacement A (θ) of the eccentric portion of the workpiece, the swinging component of the workpiece can be removed from the measurement data of the eccentric portion. Also, when canceling the shake component from the measured displacement of the eccentric part, in order to change the measurement position of the bearing part and the weight of the shake, the weighting coefficient α is applied to the displacement of the bearing part,
X (θ) = A (θ) −α × B (θ) (2)
However, 0 ≦ α ≦ 1
As an alternative, the displacement data X (θ) of the eccentric portion excluding the swirl component may be obtained. The eccentric portion displacement data X (θ) in which the swing component in the eccentric portion displacement at this time is canceled is represented by 16 in FIG. 6, and its approximate curve is represented by 18.

  Although the non-contact displacement sensor 3 is arranged vertically downward with respect to the workpiece 1 in FIG. 2, the measurement accuracy does not change even if it is installed in the lateral direction of the workpiece (backward direction of the paper), and in the lateral direction. By installing it, it is difficult for chips contained in the cutting water in the previous process to remain on the sensor, and it is possible to suppress changes in the deviation of measurement results when repeatedly measured. Is desirable.

As described above, according to the first embodiment of the present invention, since the eccentric portion of the workpiece can be phased with high accuracy, it is possible to suppress a defective grinding allowance in a cylindrical grinder.
By the way, in the conventional method of performing the phase shift, the phase shift variation of about ± 1 ° occurs due to the variation in the workpiece diameter and the surface state in contact with the jig. By using this, it was possible to suppress it to ± 0.1 ° or less.

Embodiment 2. FIG.
In the first embodiment, the workpiece phased with high accuracy is conveyed to the cylindrical grinder, but it is important to convey the workpiece to the cylindrical grinder while maintaining the phase determined by the phaser. The transfer device for this purpose and the delivery operation between the transfer device and the cylindrical grinder will be described with reference to FIG.
FIG. 7A shows a schematic diagram of the conveyance device 50 alone. As shown in FIG. 7A, the conveying device 50 is divided into a chuck part side 21 and a fixed part side (base part side) 22, a bush 23 is provided on the chuck part side, and a column 24 serving as a guide on the base part side. Is provided, and a structure having a degree of freedom in the vertical direction is provided by passing the support through the bush 23 and lifting the chuck portion side with the spring 25.
FIG. 7B is a side view showing a state in which the workpiece 1 is being transferred from the conveying device 50 to the chucks 27 and 28 of the cylindrical grinder, and FIG. 7C is a front view thereof.

Since the conveying device 50 has a degree of freedom in the vertical direction, when the workpiece 1 is transferred to the chucks 27 and 28 of the cylindrical grinding machine, the workpiece 1 sent by the conveying device 50 is slightly above the chuck 27 on the receiving side of the cylindrical grinding machine. When the workpiece 1 is stopped at the position and the chuck 1 of the cylindrical grinder grips the workpiece 1, the chuck unit side is pulled in by the expansion and contraction of the spring mechanism of the conveying device, and the positional deviation between the chuck 26 of the conveying device and the chucks 27 and 28 of the cylindrical grinder The workpiece can be gripped while holding the posture of the workpiece between the chucks.
Next, by removing the chuck 26 of the transfer device 50, the gripping of the cylindrical grinder from the transfer device is completed. Needless to say , the repositioning from the phase shifter to the transfer device can be performed in the same manner as described above.

  As described above, the conveyance device is structured to have flexibility in multiple directions with a spring or the like, so that workpieces between chucks can be transferred between the phase shifter and the conveyance device, and between the conveyance device and the chuck of the cylindrical grinder. Therefore, it is possible to suppress the change in the posture of the work due to the gripping. As a result, it is possible to suppress the remaining defect of the processed surface at the time of grinding by conveying to the cylindrical grinder while grinding the eccentric portion while maintaining the phase determined by the phase shifter.

Embodiment 3 FIG.
While maintaining the phase determined by the phase shifter according to the first and second embodiments, it can be conveyed to a cylindrical grinder to grind the eccentric part, but after calculating the phase with the phase shifter, When gripping with a conveying device or a cylindrical grinder, a phase shift calculated by the phase shifter may be shifted due to a slight shift during chucking. As a result, the center of rotation of the cylindrical grinder and the center of the eccentric portion are displaced, which may cause a defective grinding allowance during grinding. Even if there is no leftover defect, the phase shift of the eccentric portion occurs within the range of the roughing grinding allowance, and there is a possibility that the leftover at the time of grinding may occur due to this deviation and processing variation.
The third embodiment is provided with a function of offsetting and rotating an arbitrary angle to the result calculated by the phase shifter, and based on the result of the angle shift when being ground by the cylindrical grinder An offset is added to the angle calculated in (1).

  FIG. 8 shows the flow of the machining line from the phase shifter to the cylindrical grinder. The workpiece is phased by the phase shifter 40 and transferred to the cylindrical grinder 60 by the transfer device 50 while maintaining the phase. The phase shift of the eccentric portion is measured by the cylindrical grinding machine 60 (inspection step 70), and the shift amount is fed back to the phase shifter 40. Accordingly, since the direction of the eccentric part of the workpiece can be aligned with the rotation center of the cylindrical grinder on the phase shifter 40 in consideration of the deviation at the time of the conveyance chuck, the grinding surface of the eccentric part during the grinding process. In addition to suppressing unsatisfactory leftovers, the cycle time of the cylindrical grinder can be reduced by reducing the grinding time by reducing the amount of grinding allowance in the roughing of the previous process.

Embodiment 4 FIG.
When a workpiece is installed on the cylindrical grinder, measure the deviation angle between the center of rotation of the cylindrical grinder and the center of the eccentric part of the workpiece, and offset the eccentric phase calculation angle in the phase shifter in the previous process. As described in the third embodiment, it is possible to reduce the phase shift amount of the eccentric portion during the grinding process by the addition. The fourth embodiment proposes a method for measuring the amount of phase shift of the eccentric portion in such a cylindrical grinding machine.

  FIG. 9 is a schematic diagram for explaining a method of measuring a deflection amount and a deflection direction of the eccentric portion by applying a displacement gauge 30 such as a dial gauge to the eccentric portion in a state where the eccentric portion is installed. FIG. 9A shows a state in which there is no deviation when installed on the cylindrical grinder. Specifically, the center of rotation 32 of the cylindrical grinder and the center 33 of the eccentric part of the workpiece are coincident with each other. is there. Reference numeral 31 denotes the center of the bearing portion of the workpiece. The displacement of the outer periphery of the eccentric portion when the cylindrical grinder is rotated in this state is constant regardless of the rotation angle. On the other hand, when the rotation center 32 of the cylindrical grinding machine and the center 33 of the eccentric part of the workpiece are shifted as shown in FIG. 9B, if the cylindrical grinding machine is rotated in this state, the outer circumference of the eccentric part The displacement changes according to the rotation angle. Since the deviation amount and the shake amount of the eccentric portion are determined by a geometric relationship, the deviation amount β of the eccentric portion can be calculated by measuring the displacement width of the displacement. However, in the above method, in order to measure the phase shift amount, it is necessary to stop the cylindrical grinding apparatus, which causes a problem that the operation rate of the line decreases.

FIG. 10 illustrates a new method for measuring the amount of phase shift of the eccentric portion to solve the above-mentioned problem. Chamfering is performed during rough machining of the outer diameter of the eccentric portion, and the center of the chamfered portion is offset. By grinding a workpiece having the same center of the rough outer diameter of the core portion, the phase shift of the eccentric portion is calculated from the difference in the chamfer width after grinding.
FIG. 10A shows a workpiece that has undergone rough machining, and the center of the eccentric portion and the center of the chamfered portion coincide with each other by simultaneously performing chamfering during the rough machining. FIG. 10B shows the center of rotation of the cylindrical grinder and the eccentricity of the workpiece when the machining allowance is removed from the outer diameter 34 (broken line) of the roughing after chamfering to the finishing diameter 35 of the grinding with a cylindrical grinder. When the axis of the part is displaced, the left and right chamfering widths b1 and b2 when the eccentric direction of the eccentric part of the workpiece is taken downward are different. Since the difference between the chamfer width and the deviation amount of the eccentric portion is determined by a geometrical relationship, the deviation amount β of the eccentric portion can be obtained by measuring the difference in the chamfer width (b1-b2). An offset β is added to the calculation result of the phase shifter.

  By measuring the phase shift of the eccentric part from the chamfer width of the eccentric part after grinding as described above, the phase shift at the time of grinding can be measured without stopping the equipment and line, and the line operating rate is increased. In addition, the amount of phase shift can be measured efficiently. In addition, since the phase shift can be performed with high accuracy by feeding back the phase shift amount to the phase shifter, it is possible to eliminate defects on the processed surface. Furthermore, since the offset of the calculation angle of the phase shifter can be changed during mass production processing, the angle offset can be adjusted efficiently without stopping the mass production line.

1 eccentric work, 1a eccentric part, 1b bearing part, 2 support part,
3 displacement sensor, 4 phasing mechanism, 5 chuck,
6 rotation mechanism, 7 rotation phase detection sensor, 8 frame, 9 base,
21 Chuck part side, 22 Fixed part side, 23 Bush,
24 struts, 25 springs, 26 transport equipment side chuck,
27, 28 Cylindrical grinding machine chuck, 30 Dial gauge,
31 Bearing center rotation center 32 Cylindrical grinding machine rotation center
33 Center of workpiece eccentric part, 34 Roughing outer diameter, 35 Grinding outer diameter.

Claims (4)

In the method of phasing the eccentric portion before grinding the eccentric workpiece, the eccentric workpiece is gripped by a chuck provided with a rotating portion, and the eccentric of the workpiece corresponding to the rotation angle while rotating the eccentric workpiece. When measuring the displacement of the eccentric part of the workpiece in the one in which the displacement of the core part is measured in a non-contact manner, and the displacement data measured is to calculate the amount of phase deviation of the eccentric part by trigonometric approximation . Simultaneously measure the displacement of the bearing part of the workpiece without contact, and subtract the bearing displacement data from the measured displacement data of the eccentric part to cancel the swinging component of the workpiece from the measured data of the eccentric part. phase out the method of the eccentric workpiece, characterized in that the. When canceling the whirling component from the measured displacement of the eccentric part, the weighting coefficient α is applied to the displacement of the bearing part,
X (θ) = A (θ) −α × B (θ)
Where A (θ) is the displacement of the eccentric part, B (θ) is the displacement of the bearing part, 0 ≦ α ≦ 1
The eccentric work phase phasing method according to claim 1 , wherein displacement data X (θ) of the eccentric portion is obtained. 3. The eccentric work phasing method according to claim 1, wherein a trigonometric function is approximated using data of an arbitrary height or less among the measured displacement data of the eccentric portion. An eccentric workpiece phasing device for phasing an eccentric workpiece having an eccentric portion and a bearing portion before grinding processing, wherein the eccentric workpiece and the bearing portion are provided so as to face each other. A contact-type displacement sensor, a chuck that rotates while gripping one end of the eccentric workpiece, and the eccentric portion displacement and bearing measured by the non-contact sensor according to the rotation angle while rotating the eccentric workpiece. Comprising a control device that inputs a partial displacement, approximates the measured displacement data by a trigonometric function, and calculates the phase shift amount of the eccentric portion;
Eccentric displacement data X (θ)
X (θ) = A (θ) −α × B (θ) (0 ≦ α ≦ 1)
Where A (θ) is the displacement of the eccentric part, B (θ) is the displacement of the bearing part, α weighting coefficient
Phase out apparatus eccentric workpiece, characterized in that the the seek by.

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