JP2001353532A - Method and apparatus for spinning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning method and an apparatus therefor capable of precisely working while measuring a work diameter. SOLUTION: In the spinning method by which a work 15 is rotated, the work 15 is subjected to spinning by pressing with a working roller 41 from an outer peripheral face of the work toward its rotation axial center, a measurement roller 41 with which its diameter is measured beforehand is brought into pressure contact with the work 15 and is rotated together during working. Based on a diameter of the measurement roller 41, a number of rotations of the measurement roller 41 and a number of rotations of the work 15, a diameter of the work 15 is calculated, based on the calculation result, it is judged whether working is completed or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a spinning method and apparatus.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Application No. -6024, there is a method called spinning processing in which the outer peripheral surface is pressed by a processing roller while rotating the work. In the spinning process, by rotating the work and moving the processing roller with a fixed movement amount with respect to the work, the work can be pressed to obtain a desired shape. The moving amount of the processing roller has been determined based on a result of measuring a diameter of a finished product obtained by processing a work at a certain fixed moving amount. In addition, the certain amount of movement of the processing roller has been determined based on the experience and intuition of a skilled worker.

[0003]

However, the above-mentioned method merely determines the amount of movement of the processing roller at which a desired product is to be produced, while actually measuring the diameter of the work. It does not process. Therefore, when the rotating shaft rotating the workpiece is distorted due to the pressing of the processing roller, even if the processing roller is moved by a fixed amount, the target is deviated from the target by the distorted rotating shaft. Cannot produce a product having a desired diameter.

[0004] For this reason, it is necessary to repeatedly process the work and measure the finished product.
There is a high likelihood of a failed crop, resulting in considerable expense and effort.

Further, since the diameter of the work cannot be measured during the processing, it is later found that the processing has failed, and even if the work that failed the processing is tried again, the work hardening occurs. It is difficult to perform proper processing, and even if proper processing is performed, considerable cost and labor are required.

In addition, since coolant is supplied to the workpiece during machining, even if an attempt is made to measure the diameter of the workpiece using a measuring gauge (indicator), the coolant is also applied to the indicator, and the diameter of the workpiece is accurately measured. Not only is it impossible, but it can also degrade the accuracy of the indicator itself. Therefore, no indicator can be used.

Further, in the conventional method, the distortion of the rotation axis of the work is not detected. In this case, even if the force of the processing roller pressing the work becomes too large and the rotation axis of the work is largely distorted, it cannot be coped with.
There is a possibility that the processing apparatus itself may fail.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a spinning processing method capable of accurately processing a workpiece while measuring the diameter of the workpiece, and further detecting distortion of a rotation axis of the workpiece. And an apparatus.

[0009]

The above object of the present invention is achieved by the following means.

(1) In a spinning method in which a cylindrical work is rotated, and the work is pressed by a processing roller from the outer peripheral surface of the work toward a rotation axis, the work is preliminarily radiated during processing. Is pressed against the measured measurement roller, the diameter of the work is calculated based on the diameter of the measurement roller and the rotation amount ratio of the measurement roller and the work, and the processing is terminated based on the calculation result. A spinning method comprising determining whether or not the spinning process is performed.

(2) The cylindrical work sandwiched between a rotatable main shaft and a spindle that follows the main shaft via the cylindrical work is rotated, and from the outer peripheral surface of the work toward the rotation axis. In a spinning method for processing the work by pressing with a processing roller, a first detection step of detecting a rotation amount of the work, and a second detection step of detecting a rotation amount of a measurement roller that is pressed against the work and rotates together. A detecting step, a diameter calculating step of calculating a diameter of the work based on the diameter of the measuring roller measured in advance and the detection results of the first detecting step and the second detecting step, and a calculating result of the diameter calculating step And a determining step of determining whether or not to terminate the processing based on the spinning processing method.

(3) The first detecting step is characterized in that a rotation amount of a support shaft following the main shaft together with the work is detected as a rotation amount of the work.

(4) In the judging step, the machining is terminated when the calculation result of the diameter calculating step is within a preset allowable range.

(5) a third detecting step of detecting the amount of movement of the measuring roller in a direction perpendicular to the rotation axis during the processing of the work, a detection result of the third detecting step, and calculating the diameter; A distortion amount calculating step of calculating a distortion amount of a rotation axis of the workpiece based on a calculation result of the step; and an adjusting step of adjusting a force for pressing the workpiece with a processing roller based on the calculation result of the distortion amount calculating step. And further characterized by:

(6) When the calculation result of the distortion amount calculation step exceeds a preset allowable range, the force for pressing the work with the processing roller is reduced.

(7) The cylindrical work sandwiched between a rotatable main shaft and a support shaft that follows the main shaft via the cylindrical work is rotated, and from the outer peripheral surface of the work toward the rotation axis. In a spinning apparatus for processing the work by pressing with a processing roller, a measurement roller that is pressed against the work and rotates together, a first detection unit that detects a rotation amount of the work, and a rotation of the measurement roller A second detecting means for detecting an amount, a diameter calculating means for calculating a diameter of the workpiece based on a diameter of the measuring roller measured in advance and a detection result of the first detecting means and the second detecting means, A spinning processing apparatus comprising: a judging means for judging whether or not to end the processing based on a calculation result of the diameter calculating means.

[0017]

According to the first aspect of the present invention, during processing, a measuring roller whose diameter is measured in advance is pressed against a work, and the ratio of the diameter of the measuring roller to the rotation amount of the measuring roller and the work. Based on the above, the diameter of the work is calculated, and it is determined whether or not to end the processing based on the calculation result. It is not necessary to judge the shape of the workpiece, and the workpiece can be processed with high accuracy while measuring the diameter of the workpiece during processing without using an indicator or the like, so that the shape and the like of the workpiece can be improved and the processing can be completed. In addition, even if the rotation axis of the work is distorted by the pressing force of the processing roller, the work having a desired diameter can be machined with high accuracy without being affected.

According to a second aspect of the present invention, in the first detecting step, the amount of rotation of the work is detected, and in the second detecting step, the amount of rotation of the measuring roller which is pressed against the work and rotates together is detected. In the diameter calculation step, the diameter of the work is calculated based on the diameter of the measurement roller measured in advance and the detected rotation amount of the measurement roller and the work, and in the determination step, the processing is terminated based on the diameter of the work. It was decided whether to do it.

Therefore, it is not necessary to determine whether or not a desired work is produced by measuring the work after processing, and to accurately measure the work diameter while measuring the work without using an indicator or the like. As a result, the shape and the like of the work can be made favorable, and the processing can be completed. In addition, even if the rotation axis of the work is distorted by the pressing force of the processing roller, the work having a desired diameter can be machined with high accuracy without being affected.

According to the third aspect of the present invention, the rotation amount of the support shaft following the main shaft together with the work is detected as the rotation amount of the work, so that the work and the main shaft slide, and the rotation of the main shaft is applied to the work. Even when the rotation is not transmitted as it is, an accurate rotation amount of the work can be detected.

According to the fourth aspect of the present invention, the machining is completed within a preset allowable range of the diameter, so that the diameter of the workpiece after the machining can be set to any precision as required. it can.

According to a fifth aspect of the present invention, in the third detecting means, the amount of movement of the measuring roller in a direction perpendicular to the rotation axis during the processing of the workpiece is detected, and in the distortion amount calculating step, The amount of distortion of the rotation axis of the work is calculated based on the movement amount and the change amount of the diameter of the work, and in the adjustment process,
The force for pressing the work is adjusted based on the amount of distortion. Therefore, it is possible to prevent the rotation axis of the work from being distorted beyond a predetermined level due to the force of the processing roller pressing the work. As a result, it is possible to prevent a situation in which the processing apparatus itself breaks down.

According to a sixth aspect of the present invention, in the distortion setting step, when the distortion exceeds a preset allowable range of distortion.
Since the force for pressing the work is reduced, the distortion of the rotating shaft of the work can always be suppressed within a set allowable range.

According to a seventh aspect of the present invention, the measurement roller is pressed against the work and rotates together, the first detection means detects the rotation amount of the work, and the second detection means detects the rotation amount of the measurement roller. The diameter calculation means calculates the diameter of the work based on the measured diameter of the measurement roller and the rotation amount of the measurement roller and the work, and the determination means ends the processing based on the diameter of the work being processed. It was decided whether or not.

Therefore, there is no need to measure the work after processing to determine whether or not a desired work has been made, and to accurately measure the diameter of the work during processing without using an indicator or the like. As a result, the shape and the like of the work can be made favorable, and the processing can be completed. In addition, even if the rotation axis of the work is distorted by the pressing force of the processing roller, the work having a desired diameter can be machined with high accuracy without being affected.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic structural view of a spinning apparatus according to the present invention, FIG. 2 is a cross-sectional view of a main part showing a spindle portion of the spinning apparatus, and FIG. 3 is a cross-sectional view showing a measuring section of the spinning apparatus. It is.

In FIG. 1, a spinning apparatus 10 according to the present invention processes a work 15 while calculating the diameter of the work 15. The spinning device 10 includes a main shaft portion 20 for rotating the work 15.
And a spindle portion 30 that sandwiches the work 15 between the main shaft portion 20 and follows the rotation of the main shaft portion via the work 15, and a processing portion 40 that presses and works the work 15.
A measuring unit 50 that presses against the work 15 to measure the state of processing, an operation panel 60 on which an input such as processing start is performed by an operator, and a control unit 70 that controls the operation of each unit.

First, the main shaft portion 20 includes a motor M1 serving as a prime mover for rotating the work 15, a belt 21 for transmitting the rotation of the motor M1, a support member 22 for rotatably supporting a mandrel 23, and a belt 21. Rotate work 1
5 to provide a mandrel 23.

The spindle 30 includes a tail stock 31 for holding the work 15 between the mandrel 23 and an encoder 32 for detecting the rotation amount of the tail stock 31.
Supporting portion 33 that rotatably supports tailstock 31
And a hydraulic cylinder 34 that generates pressure when the tail stock 31 clamps the work 15.

As shown in FIG. 2, the tail shaft 31 of the support shaft portion 30 is rotatably supported by a bearing member 36 of a support portion 33. The rotation of the tail stock 31 is detected by the encoder 32 and transmitted to the control unit 70 as an electric signal.

The processing section 40 includes a processing roller 41 pressed against the work 15 and a pedestal 4 supporting the processing roller 41.
2, a motor M2 for moving the pedestal 42 perpendicularly to the rotation axis of the work 15, and a motor M2 for moving the pedestal 42 to the work 15
M3 for moving in parallel to the rotation axis of the motor M3
And The male screw provided at the tip of the motor M2 is provided on the pedestal 42 and is screwed to the screw. Therefore, when the motor M2 rotates, the screw feed action causes
The amount by which the pedestal moves perpendicular to the rotation axis of the work 15 changes. Using the same principle, the motor M3 also moves the base 42.

The measuring section 50 is disposed on the opposite side of the work roller 41 with respect to the work 15, and is provided so as to be pressed against the work 15 and rotate together with the work 15, and to detect the rotation of the measurement roller 51. Pressing part 53 for pressing the measured encoder 52 and the measuring roller 51 against the work.
And a movement detector 54 for detecting the movement of the measurement roller 51.

The measuring section 50 will be described in further detail. As shown in FIG. 3, a moving body 55 supporting the measuring roller 51 is
The measurement roller 51 is provided so as to be movable vertically with respect to the rotation axis of the work 15, and the measurement roller 51 is constantly moved by the elastic body S
5 is urged in the direction to be pressed against. The elastic body S is, for example, a spring.

A hydraulic chamber 57 for supplying hydraulic pressure is provided on a side surface of the moving body 55. When oil is supplied to the hydraulic chamber 57 from the oil supply pump 56 via the oil passage 56a, the moving body 55 moves in the direction opposite to the rotation axis of the work 15. In this way, a force repelling the urging force of the elastic body S is applied to the moving body 55, so that the measurement roller 51 that has been pressed is separated from the work 15. The moving body 55
Moving body 5 in contact with inner surface 59a of holding body 59 holding
Since the O-ring R1 is provided on the outer peripheral surface 55a of 5, the oil supplied through the oil passage 56a does not leak from the hydraulic chamber 57 toward the elastic body S. The supply of oil by the oil supply pump 56 is controlled by the control unit 70.

The cover C is screwed to the holder 59 so that the moving body 55 does not come off the holder 59 and the hydraulic chamber 57 is formed. An O-ring R2 is provided on an inner surface C1 of the cover C which contacts the moving body 55,
The flange surface C2 of the cover C abutting on the holding body 59 is also O
Since the ring R3 is provided, the oil supplied from the oil supply pump 56 does not leak out of the cover C from the hydraulic chamber 57.

The movement amount detector 54 includes a magnescale 58
Thus, the moving amount of the moving body 55 is always detected. The detected movement amount of the moving body 55 is transmitted to the control unit 70 as an electric signal. Further, the rotation amount of the measurement roller 51 detected by the encoder 52 is also converted into an electrical signal by the control unit 7.
Sent to 0.

The operation panel 60 is connected to the control unit 70, and is used by an operator to input commands for starting and stopping the spinning apparatus 10.

The control unit 70 is connected to the encoder 32, the encoder 52, the movement detector 54, and the operation panel 60,
The motor M1, the hydraulic cylinder 34, the motor M2, the motor M3, and the oil supply pump 56 are controlled based on these detection results or instructions.

Next, the operation of the spinning apparatus 10 will be described.

FIG. 4 shows the mandrel 23 before starting the work processing.
5 is a cross-sectional view of a main part showing a state of the tail stock 31 and a state of the mandrel 23 and a state of the tail stock 31 after work processing is started.

First, as shown in FIG.
The work 15 is held between the work piece 15 and the tail stock 31. Here, the tailstock 31 is firmly pressed against the work 15 fitted on the mandrel 23 by the pressure of the hydraulic cylinder 34. In addition, the hydraulic pressure supplied to the hydraulic chamber 57 of the measuring unit 50 is released, and the measurement roller 51 is moved by the urging force of the elastic body S, and the measurement roller 51 is pressed against the work 15.

When the start of machining is instructed on the operation panel 60 in a state where the work 15 is sandwiched between the mandrel 23 and the tail stock 31, a rotation command is given to the motor M1 of the spindle 20. When the motor M1 rotates, the mandrel 23 is also rotated via the belt 21.
Following the rotation of the mandrel 23, the work 15 and the tail stock 31 also rotate. The rotation of the tail stock 31 is detected by the encoder 32 and transmitted to the control unit 70 as an electric signal.

Here, when the work 15 starts rotating, the measuring roller 51 pressed against the work 15 moves the work 1
Rotates with 5. The rotation of the measuring roller 51 is detected by the encoder 52, and the measuring roller 51
The amount of movement in the axis direction of No. 5 is detected by the magnescale 58 and transmitted to the control unit 70 as an electric signal.

Then, the processing roller 41 of the processing section 40 starts pressing the work 15. At this time, the processing roller 41 presses the work 15 by moving the pedestal 42 by controlling the motor M2 by the control unit 70.

When the processing is completed, the control unit 70 controls the motor M so that the processing roller 41 is separated from the work 15.
2 is controlled.

Then, hydraulic pressure is supplied to the hydraulic chamber 57 of the measuring section 50, and the moving body 55 is moved against the urging force of the elastic body S against the measuring roller 51, whereby the measuring roller 51 Move away from

The operation of each unit from the start of processing is controlled by the control unit 70 as described above.

The control unit 70 controls the encoder 32,
The operation of each unit is further controlled based on the electric signals transmitted from the encoder 52 and the movement amount detector 54.

Hereinafter, a control system in the spinning apparatus 10 will be described.

FIG. 6 is a block diagram showing a control relationship in the spinning apparatus 10 according to the present invention.

First, the control unit 70 includes a control device 80 and a measurement processing device 81. Further, the measurement processing device 81 includes a detection unit 82, a calculation unit 83, a storage unit 84,
And an output unit 85. Further, the operation panel 60 is provided with an input unit 86 for the operator to input processing settings (work diameter, allowable range of work diameter accuracy, allowable range of distortion of the rotation axis of the work, etc.). The information of the setting input through the input unit 86 is stored in the storage unit 84.

The detection results detected by the encoder 32, the encoder 52, and the movement detector 54 are received by the detection unit 82. The calculation unit 83 performs a calculation based on the setting information stored in the storage unit 84 and the detection result received by the detection unit 82, and outputs the calculation result to the output unit 85.
Send from. The control device 80 receives the calculation result, and based on the calculation result, the motor M1, the hydraulic cylinder 3
4. Control the motor M2, the motor M3, and the oil supply pump 56.

Next, a more specific spinning apparatus 1
The control of 0 will be described with reference to FIGS.

FIGS. 7 and 8 are flow charts showing the flow of control of the spinning apparatus 10, respectively. In FIG. 7, when the diameter of the work 15 is calculated and feedback control is performed, FIG. Further, since the present invention relates to the case where the amount of distortion of the rotation axis of the work 15 is calculated and feedback control is performed, a specific control flow will be described below with the former being the first embodiment and the latter being the second embodiment. .

(First Embodiment) FIG.
5 is a flowchart showing an operation of the spinning apparatus 10 when performing processing while calculating the diameter of the spinning processing.

In step S 10, initial settings for processing are input from the input unit 86 to the measurement processing device 81. Here, the input of the initial setting of the processing includes the diameter d (mm) of the measurement roller 51 measured in advance, the number of pulses a per rotation of the measurement roller 51 detected by the encoder 52 (pulse / rotation). ), The number of pulses b per rotation of the tailstock 31 detected by the encoder 32
(Pulse / rotation), and input of a target value G (mm) of the diameter of the work 15 at the time of completion of processing and an allowable error g (mm). The input initial settings are stored in the storage unit 84.

In step S11, the spinning apparatus 10 starts processing the work 15 in accordance with the input initial settings.

In step S12, the number of rotations n (rpm) of the measurement roller 51 per minute is calculated. here,
First, based on the detection of the encoder 52, the measurement processing device 81 receives the number of pulses c (pulses) per unit time S (sec) of the measurement roller 51. And the operation unit 8
3 substitutes the received value and the contents of the initial setting stored in the storage unit 84 into the following equation.

N = (c × 60) / (a × S) In step S13, the number of rotations N (rpm) of the tail stock 31 per minute is calculated. Here, first, based on the detection of the encoder 32, the measurement processing device 81 receives the number of pulses e (pulses) per unit time S (sec) of the tail stock 31. Then, the calculation unit 83 substitutes the received value and the contents of the initial setting stored in the storage unit 84 into the following equation.

N = (e × 60) / (b × S) In step S14, the diameter D (mm) of the work 15 being processed is determined.
Is calculated. Here, the diameter of the workpiece 15 being processed is calculated based on the ratio of the number of rotations of the measurement roller 51 to the tail stock 31 and the diameter d (mm) of the measurement roller 51 input in the initial setting. That is, these values are substituted into the following equation to calculate the diameter D (mm) of the work 15 being processed.

D = d × n / N As described above, if the rotation speed N of the tail stock 31 that follows the mandrel 23 together with the work is used as the rotation speed of the work 15, the work 15 and the mandrel 23 slip,
Even if the rotation of the mandrel 23 is not transmitted as it is,
An accurate rotation speed of the work 15 can be detected.

In step S15, it is determined whether or not the diameter of the work 15 calculated in step S14 is within an allowable error range of the target value. Here, due to the nature of the processing,
Since the work is processed so that the diameter of the work 15 is reduced, the work of the work 15 may be completed within a range larger than the target value G (mm) of the diameter by an allowable error g (mm). Therefore, the range G + g in which the diameter of the work 15 after processing is allowable.
(Mm) If it becomes less than or equal to, processing may be terminated.
If G + g, the process proceeds to step S16. Conversely, D> G + g
If so, the processing has not progressed to the permissible range, and it is necessary to continue the processing, so the process returns to step S12.

In step S 16, since the work 15 has been processed to within the allowable range, a signal indicating the end of processing is transmitted from the arithmetic unit 83 to the control unit 80 via the output unit 85. Then, the control device 80 controls each unit shown in FIG. 6 to end the operation of the entire spinning device 10.

The above flow will be described by substituting specific numerical values.

For example, in step S10, the initial setting is d
= 50 (mm), a = 1000 (pulse / rotation), b = 1
000 (pulse / rotation), G + g = 100 + 0.1 (m
When m) is input, the number of pulses c = 100 (pulses) of the measurement roller 51 per unit time S = 0.01 (second) is received in step S12, and step S13 is performed.
Suppose that the number of pulses e = 50 pulses of the tail stock 31 per unit time S = 0.01 (second) has been received.

At this time, when these values are substituted into step S12, n = 100 × 60/1000 / 0.01 = 600, and when these values are substituted into step S13, N = 50 × 60/1000 / 0.01 = 300 Becomes

Further, when substituting into step S14, D = 600 × 50/300 = 100, and the diameter of the work 15 is within the allowable range of the target value of the work 15 after processing inputted in the initial setting. , The processing of the work 15 is completed.

As described above, according to the present embodiment, since the machining is performed while actually measuring the diameter of the work, the rotating shaft for rotating the work by pressing the work with the machining roller is distorted. Even so, a product with a desired diameter can be made regardless of the distortion of the rotating shaft.

Further, since the diameter of the workpiece is measured during the processing, it is not necessary to detect that the processing has failed later, or to rework the workpiece for which the processing has failed. Labor can be reduced.

Further, it is not necessary to use an indicator or the like to measure the diameter of the work.

(Second Embodiment) A feature of the second embodiment is that, in addition to the measurement of the diameter of the work being processed, the distortion of the rotation axis of the work is also detected. The invention according to the second embodiment is to perform feedback control so as to reduce the pressing force when the force of pressing the work by the processing roller becomes too large.

FIG. 8 shows the calculation of the diameter of the work 15 and
5 is a flowchart illustrating an operation of the spinning processing apparatus 10 when performing processing while also calculating the distortion of the rotation axis of the work 15.

In step S 20, an initial setting of processing is input from the input unit 86 to the measurement processing device 81. Here, the input of the initial setting of the processing includes the diameter d (mm) of the measurement roller 51 measured in advance and the number of pulses a per one rotation of the measurement roller 51 (pulse / pulse) detected in advance by the encoder 52. Rotation), the number of pulses b (pulses / rotation) per rotation of the tailstock 31 detected in advance by the encoder 32, the target value G (mm) of the diameter of the work 15 at the time of completion of machining, and an allowable error g (mm). ), And inputting the allowable range H (mm) of the distortion of the rotation axis of the work 15. The input initial settings are stored in the storage unit 84.

In step S21, the spinning apparatus 10 starts processing the work 15 in accordance with the input initial settings.

In step S22, the calculating section 83 calculates the diameter of the work 15 immediately after the start of machining, and stores the calculated diameter of the work 15 in the storage section 84 as an initial value D0 (mm). The initial value D0 is a reference value when calculating the distortion of the rotation axis of the work 15. The method of calculating the diameter of the work 15 here is the same as the method from step S12 to step S14 in FIG.

In step S23, the arithmetic unit 83 detects the amount of movement of the measuring roller 51 immediately after the start of processing, and sets the initial value Z0 (mm) of the amount of movement of the measuring roller 51 as the storage unit 8
4 is stored. The initial value Z0 is a reference value when calculating the distortion of the rotation axis of the work 15. Here, the movement amount of the measurement roller 51 is defined as a magnescale 58 shown in FIG.
Is obtained by detecting the moving amount of the moving body 55 which moves integrally with the measuring roller 51. The initial value Z0 of the moving amount of the measuring roller 51 is determined by the measuring Is a value detected by the magnescale 58 when pressed against the.

In step S24, the work 15 being processed is
Is calculated. The calculated diameter D of the workpiece 15 being processed
1 (mm) is stored in the storage unit 84. The calculation of the diameter of the work 15 is performed in the same manner as in steps S12 to S14 in FIG.

In step S25, the amount of movement of the measuring roller 51 during processing in the direction perpendicular to the rotation axis of the work 15 is detected. The detected movement amount Z1 (mm) of the measurement roller 51 during processing is stored in the storage unit 84.
It is assumed that the movement amount Z1 decreases as the measurement roller 51 approaches the rotation axis of the work 15, that is, the value detected by the magnescale 58 decreases.

In step S26, the amount of distortion W (mm) of the rotation axis of the work 15 is calculated. Here, the initial value D0 (mm) of the diameter of the work 15 stored in the storage unit 84, the initial value Z0 (mm) of the movement amount of the measurement roller 51, the diameter D1 (mm) of the work 15 being processed, and The amount of displacement W (mm) of the rotating shaft of the workpiece is calculated by substituting the movement amount Z1 (mm) of the measurement roller 51 during processing into the following equation.

W = (Z1−Z0) − (D1−D0) / 2 (D1−D0) / 2 indicates how much the diameter of the work 15 has been reduced with respect to the rotation axis after processing. Also,
(Z1-Z0) indicates how much the measurement roller 51 has moved. Therefore, if the rotation axis of the work 15 is not distorted, the measurement roller 51 moves by an amount corresponding to the reduction in the diameter of the work 15 due to the progress of the processing.
0)-(D1-D0) / 2 is approximately 0. Conversely, when the rotation axis of the work 15 is distorted, that is, when the processing roller 41 is strongly pressed against the work 15,
Since the value of (Z1-Z0) increases, the value of W also increases.

In step S27, it is determined whether or not the amount of distortion W is within a distortion allowable range (H mm). here,
If W ≦ H, the distortion amount W is within the allowable distortion range (H mm), and the process proceeds to step S27. Also, if W> H,
Since the distortion amount W exceeds the distortion allowable range (Hmm), the process proceeds to step S28.

In step S 28, the arithmetic section 83 transmits an abnormal signal to the control device 80 via the output section 85. Based on this abnormal signal, the control device 80
Controls the motor M2 such that the force pressing the work 15 becomes smaller. Then, the process returns to step S24 to continue the processing.

In step S29, it is determined whether or not the diameter of the work 15 calculated in step S24 is within an allowable error range of the target value. This determination is made in step S3 if D ≦ G + g, as in step S15 in FIG.
Then, if D> G + g, the process returns to step S24.

In step S 30, since the work 15 has been processed to within the allowable range, a signal indicating the end of processing is transmitted from the arithmetic unit 83 to the control device 80 via the output unit 85. Then, the control device 80 controls each unit shown in FIG. 6 to end the operation of the entire spinning device 10.

As described above, according to the present embodiment, since the machining is performed while actually measuring the diameter of the work, the rotating shaft for rotating the work by pressing the machining roller is distorted. However, a product having a desired diameter can be produced regardless of the distortion of the rotating shaft.

Further, since the diameter of the workpiece is measured during the processing, it is not necessary to detect that the processing has failed later, or to rework the workpiece for which the processing has failed. Labor can be reduced.

In addition, since the rotation speed of the tailstock that follows the mandrel together with the work is used as the rotation speed of the work, even if the work and the mandrel slip and the rotation of the mandrel is not transmitted as it is, the accurate rotation of the work is achieved. The number can be detected.

Further, it is not necessary to use an indicator or the like to measure the diameter of the work.

Further, since the distortion of the rotating shaft of the work can be detected, the force of pressing the work by the working roller becomes too large, thereby preventing the rotating shaft of the work from being greatly distorted and leading to the failure of the processing apparatus itself. be able to.

The present invention is not limited to the above-described embodiment, but can be variously modified and used within the scope of the claims. For example, in the above-described embodiment, the processing roller 41 and the measurement roller 51 are located on the opposite side of the workpiece 15 by 180 degrees about the rotation axis, but are located at 90 degrees or 45 degrees. May be.

In the above embodiment, the processing roller 4
1 and the measurement roller 51 are provided separately, but the diameter of the work 15 may be measured by the processing roller 41. When the diameter of the work 15 is measured by the processing roller 41, it cannot be accurately measured unless the diameter of the processing roller 41 is constant. It is necessary to form the processing roller 41 with a substance that hardly causes deformation.

[Brief description of the drawings]

FIG. 1 is a view showing a schematic configuration diagram of a spinning apparatus according to the present invention.

FIG. 2 is a sectional view showing a main part of a spindle portion of the spinning apparatus according to the present invention.

FIG. 3 is a cross-sectional view showing a measuring unit of the spinning apparatus according to the present invention.

FIG. 4 is a cross-sectional view of a main part showing a state of a mandrel and a tail stock before starting work processing.

FIG. 5 is a cross-sectional view of a main part showing a state of a mandrel and a tail stock after starting work processing.

FIG. 6 is a block diagram showing a control system in the spinning apparatus according to the present invention.

FIG. 7 is a flowchart showing the operation of the spinning processing apparatus when performing processing while calculating the diameter of the work.

FIG. 8 is a flowchart showing the operation of the spinning processing apparatus when performing processing while calculating the diameter of the work and calculating the distortion of the rotation axis of the work.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Spinning processing apparatus, 20 ... Spindle part, 30 ... Spindle part, 32,52 ... Encoder, 34 ... Hydraulic cylinder, 40 ... Working part, 41 ... Working roller, 50 ... Measurement part, 51 ... Measurement roller, 54 ... Moving amount detector, 56 ... Oil supply pump, 60 ... Operation panel, 70 ... Control unit, 80 ... Control device, 83 ... Calculation unit, 84 ... Storage unit, 86 ... Input unit.

Claims (7)

[Claims] 1. A spinning method for processing a work by rotating a cylindrical work and pressing the work from an outer peripheral surface of the work toward a rotation axis with a processing roller, wherein the diameter of the work is previously adjusted during the processing. The measured roller for measurement is brought into pressure contact, the diameter of the work is calculated based on the diameter of the measured roller and the rotation ratio of the measured roller and the work, and the processing is terminated based on the calculation result. A spinning method comprising determining whether or not the spinning process is performed. 2. The method according to claim 1, further comprising: rotating the cylindrical work sandwiched between a rotatable main shaft and a support shaft that follows the main shaft via the cylindrical work, and processing the work from the outer peripheral surface of the work toward the rotation axis. In a spinning method for processing the work by pressing with a roller, a first detection step of detecting a rotation amount of the work, and a second detection of detecting a rotation amount of a measurement roller that is pressed against the work and rotates together. A step of calculating a diameter of the work based on the diameter of the measurement roller measured in advance and the detection results of the first detection step and the second detection step; and a calculation result of the diameter calculation step. A determination step of determining whether or not to terminate the processing based on the spinning method. 3. The spinning method according to claim 2, wherein the first detecting step detects a rotation amount of a support shaft that follows the main shaft together with the work as a rotation amount of the work. 4. The method according to claim 2, wherein in the determining step, when the calculation result of the diameter calculating step is within a preset allowable range, the machining is terminated.
The spinning method described in 1. 5. A third detecting step of detecting a moving amount of the measuring roller moved in a direction perpendicular to a rotation axis during processing of the workpiece, a detection result of the third detecting step, and the diameter calculating step. Based on the calculation result, a distortion amount calculation step of calculating the distortion amount of the rotation axis of the work, Based on the calculation result of the distortion amount calculation step, an adjustment step of adjusting the force to press the work with the processing roller, The spinning method according to claim 2, further comprising: 6. The method according to claim 5, wherein in the adjusting step, when a calculation result of the distortion amount calculating step exceeds a preset allowable range, a force for pressing the work with a processing roller is reduced. The spinning method described. 7. The cylindrical work held between a rotatable main shaft and a support shaft that follows the main shaft via the cylindrical work is rotated, and processing is performed from the outer peripheral surface of the work toward the rotation axis. In a spinning apparatus for processing the work by pressing with a roller, a measurement roller that is pressed against the work and rotates together, a first detection unit that detects a rotation amount of the work, and a rotation amount of the measurement roller Second detecting means for detecting the diameter of the work, based on the diameter of the measuring roller measured in advance and the detection results of the first detecting means and the second detecting means, A determining means for determining whether or not to terminate the processing based on a calculation result of the calculating means.