JPH09300205A - Honing processing state detection method, honing machine, honing tool, master ring used for the method - Google Patents

Abstract

(57) Abstract: A honing process capable of knowing a machining state detection position with respect to a machining hole WH of a workpiece and also detecting the temperatures of the honing tool 11 and the workpiece W at that time. It is to provide a state detection method, a honing machine, a honing tool, and a master ring that are used in the same direction. SOLUTION: When the honing tool 11 performs honing of a machining hole WH of a workpiece W, and then air is ejected from the sizing nozzle 21 provided in the honing tool 11 to the inner peripheral surface of the machining hole WH. When the back pressure of the machined hole is detected and the diameter of the machined hole WH is measured, the machined hole WH
The position of the honing tool 11 with respect to the axial direction of the honing tool 11 and the rotational angle position of the honing tool 11 with respect to the machining hole are detected.
It is the structure which measures each temperature by 5,49.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the honing state by measuring the diameter of the machined hole after the machined hole has been machined, and a honing machine used with the method. The present invention relates to a honing tool and a master ring. More specifically, it is possible to know a machining state detection position with respect to a machining hole in a workpiece and also detect the temperature of the honing tool and the workpiece at that time. The present invention relates to a machining state detecting method, a honing machine, a honing tool, and a master ring used for the method.

[0002]

2. Description of the Related Art As a prior art example relating to the present invention, there is, for example, Japanese Patent Laid-Open No. 62-277262. The configuration of this prior example is as shown in FIG. That is, the spindle 10 provided on the honing machine so as to be vertically movable and rotatable.
A honing tool 103 is detachably and replaceably provided at the lower end portion of 1. The tool body 105 of the honing tool 103 is provided with whetstone shoes 107 that are movable in the radial direction (radial direction) at equal intervals in the circumferential direction, and the tool body 105 is used to machine a hole for a workpiece (work) W. A plurality of guide members 109 that guide in the axial direction along the WH are provided at equal intervals. An appropriate guide member 109 of the above guide members 109 is provided with a sizing nozzle 111 as a measuring portion of an air micrometer.

Further, inside the tool body 105, the grindstone shoe 107 is pushed radially outward, so that the grindstone 113 provided on the grindstone shoe 107 is pressed against the inner peripheral surface of the machined hole WH. A rod 117 having a taper portion 115 is installed so as to be vertically movable.

Inside the spindle 101, a push rod 119 is installed which is vertically movable by a fluid pressure cylinder so as to be able to push down the rod 117. Further, the spindle 101 is provided with a pipe line 123 which is connected to the sizing nozzle 111 and communicates with an air passage 121 provided in the tool body 105. The pipe line 123 is an A / E for converting air pressure into voltage. It is connected to the converter 125. The detected value of the A / E converter 125 is amplified by the amplifier 127 and connected to the control unit 131 via the rotary transformer 129.

In the above-mentioned structure, after the honing tool 103 is used to perform the honing of the machined hole WH, the sizing nozzle 111 provided in the honing tool 103 to the inner peripheral surface of the machined hole WH. By detecting the back pressure when the air is blown out by the A / E converter 125, the gap size between the sizing nozzle 111 and the inner peripheral surface of the machining hole WH is measured, and the diameter of the machining hole WH is determined. It is something to measure.

[0006]

By the way, in the above-mentioned configuration, when measuring the diameter of the machined hole of the workpiece, it is not possible to detect the axial and rotational measurement positions of the machined hole. In addition, the temperature of the honing tool and the workpiece cannot be detected during measurement.

Further, in the above-mentioned structure, since the sizing nozzle provided in the honing tool and the A / E converter are relatively distant from each other, the back pressure when air is ejected from the sizing nozzle. There is a problem in improving the sensitivity of detection because the rise of back pressure tends to lag due to the resistance of the pipeline or the like.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 is to be machined by a honing tool mounted on the end of the spindle of a honing machine. After performing honing of the machined hole of the object, detect the back pressure when air is ejected from the sizing nozzle as the measuring part of the air micrometer provided in the honing tool to the inner peripheral surface of the machined hole. It is a honing processing state detecting method for detecting the position of the honing tool with respect to the axial direction of the processing hole and the rotational angle position of the honing tool with respect to the processing hole when measuring the diameter of the processing hole.

According to a second aspect of the present invention, in the first aspect of the invention, when measuring the diameter of a machined hole in a workpiece, a honing tool and a honing state detecting method for measuring the temperature of the workpiece. Is.

According to a third aspect of the present invention, there is provided a honing machine having a spindle at which a honing tool is detachably attached and replaceable at a tip end thereof so as to be rotatable and reciprocally movable in the axial direction. It is a honing machine provided with an angle detector and a stroke position detector for detecting the axial reciprocating position of the spindle.

According to a fourth aspect of the present invention, in the invention according to the third aspect, an air pressure sensor for detecting a back pressure when air is ejected from a sizing nozzle provided in the honing tool is provided in the spindle. A honing machine provided near the tip.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, an amplifier for the air pressure sensor and an oscillator for transmitting a detection value of the air pressure sensor, and a power source for the amplifier and the oscillator are provided on a spindle. It is a honing board provided.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the oscillator is a honing machine that also serves as an oscillator that transmits the detection value of the temperature sensor provided in the honing tool.

According to a seventh aspect of the present invention, there is provided a honing tool for honing a machining hole of a workpiece,
It is provided with a temperature sensor for measuring the temperature of the honing tool itself.

According to the eighth aspect of the present invention, a master ring whose inside diameter is machined with high precision in advance is equipped with a temperature sensor for measuring the temperature of the master ring itself.

[0016]

According to the first aspect of the present invention, after the honing of the machined hole of the workpiece is performed by the honing tool attached to the end of the spindle of the honing machine,
When measuring the diameter of the machined hole by detecting the back pressure when air is jetted from the sizing nozzle as the measuring part of the air micrometer provided in the honing tool to the inner peripheral surface of the machined hole, the machining Since the position of the honing tool with respect to the axial direction of the hole and the rotational angle position of the honing tool with respect to the machining hole are detected, it is possible to detect the axial direction and the rotational angle position when measuring the diameter of the machining hole. It is possible to accurately detect the strained position, strained direction, etc. of the machined hole after machining.

Therefore, by knowing the strain position, strain direction, etc., the characteristics of the honing tool can be grasped, and the precision control of the machined hole, the life control of the honing tool, etc. can be improved.

According to a second aspect of the invention, in the invention of the first aspect, when measuring the diameter of the machined hole of the workpiece,
Since the temperature of the honing tool and the workpiece is measured, the temperature of the honing tool and the workpiece when measuring the diameter of the machined hole can be known, and the thermal expansion etc. should be corrected for the reference temperature. It is possible to improve the accuracy control of the processed hole.

According to a third aspect of the present invention, there is provided a honing machine having a tip end portion on which a honing tool is detachably attached and replaceable, which is rotatable and axially reciprocable.
Since the rotation angle detector for detecting the rotation angle of the spindle and the stroke position detector for detecting the reciprocating position of the spindle in the axial direction are provided, after the honing process, from the sizing nozzle of the honing tool. When the air is jetted and the back pressure is detected to measure the diameter of the machined hole, it is possible to know the axial position and the rotational angle position of the machined hole.

Therefore, when there is distortion in the machined hole, the position and direction of the distortion can be detected three-dimensionally, and the precision control of the machined hole of the workpiece can be improved.

According to a fourth aspect of the present invention, in the invention according to the third aspect, an air pressure sensor for detecting a back pressure when air is ejected from a sizing nozzle provided in the honing tool is provided at the tip of the spindle. Since it is provided near the part, the distance between the sizing nozzle and the air pressure sensor becomes shorter, and the back pressure is detected when the back pressure rises little when air is jetted from the sizing nozzle. Therefore, the detection can be performed more quickly and with high sensitivity.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, an amplifier for the air pressure sensor, an oscillator for transmitting the detection value of the air pressure sensor, and a power source for the amplifier and the oscillator are provided on the spindle. Therefore, the detection result of the back pressure when air is ejected from the sizing nozzle provided in the honing tool can be wirelessly transmitted and received.

Therefore, even if the air pressure sensor is provided near the tip of the spindle, the detected value can be obtained with a simple structure.

According to a sixth aspect of the present invention, in the invention according to the fifth aspect, since the transmitter also serves as a transmitter for transmitting the detection value of the temperature sensor provided in the honing tool, the detection of the temperature sensor is performed. The value can be obtained wirelessly.
Moreover, the structure is further simplified by also using the oscillator.

The invention according to claim 7 is a honing tool for honing a hole to be machined in a workpiece, comprising a temperature sensor for measuring the temperature of the honing tool itself. It is possible to detect the temperature, for example, it becomes possible to control the temperature by controlling the amount of coolant supplied to the processing part of the honing tool during honing processing, and to improve the processing accuracy of the machined hole of the workpiece. You can Further, it is possible to correct the thermal expansion by detecting the temperature of the honing tool when the back pressure is detected by measuring the diameter of the machined hole by ejecting air from the sizing nozzle provided in the honing tool.

The invention according to claim 8 is a master ring whose inside diameter is machined with high accuracy in advance, and is provided with a temperature sensor for measuring the temperature of the master ring itself. The coolant is applied to the master ring and the workpiece during honing, and the temperatures of the master ring and the workpiece can be considered to be almost the same, and the workpiece can be indirectly processed by detecting the temperature of the master ring itself. The temperature of the object can be detected.

Therefore, it is possible to correct the thermal expansion by detecting the temperature at the time of measuring the diameter of the machined hole.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a spindle 1 provided on a honing machine (the entire structure is not shown) operates a linear actuator 3 such as a fluid pressure cylinder provided on the main body of the honing machine. Is provided so as to reciprocate in the axial direction (vertical direction in FIG. 1), and is provided so as to rotate about the axis by the action of a rotary actuator 5 such as a motor provided at an appropriate position. Since the configuration for reciprocating the spindle 1 in the honing machine in the axial direction and the configuration for rotating the spindle 1 about the axis may be known configurations, a configuration for reciprocating and rotating the spindle 1 may be used. A more detailed description of is omitted.

In order to detect the stroke position of the reciprocating movement of the spindle 1, a stroke position detector 7 is provided at a part of the spindle 1. The stroke position detector 7 may have a configuration capable of detecting the stroke position of the spindle 1 in the axial direction from the reference position in the axial direction (for example, the position where the spindle 1 is moved up to the maximum), such as a magnet scale. A linear scale can be used. In this example, the linear actuator 3 is provided on the operating rod 3R in order to detect the stroke position of the operating rod 3R.

Therefore, when the linear actuator 3 is operated to reciprocate the spindle 1 in the axial direction, the stroke position detector 7 can detect the movement position from the reference position in the axial direction.

When the spindle 1 is rotated by the operation of the rotary actuator 5, a rotation angle detector 9 is provided to detect the rotation angle position of the spindle 1 from the reference position in the rotation direction.

The rotation angle detector 9 may have a structure capable of detecting the rotation angle position of the spindle 1 from the reference position, and for example, a rotary encoder can be used. The rotation angle detector 9 can be provided directly on the spindle 1, but in the present example, it is provided on the rotary actuator 5.

Therefore, the rotary actuator 5
When the spindle 1 is rotated by activating, the rotation angle position of the spindle 1 from the reference position in the rotation direction (for example, the position where the origin pulse is output in the rotary encoder) can be detected.

A honing tool 11 for honing the processing hole WH of the workpiece W is detachably mounted on the tip (lower end) of the spindle 1. The tool body 13 of the honing tool 11 includes a plurality of grindstone shoes 1 that are movable in the radial direction (radial direction).
5 are arranged at equal intervals in the circumferential direction, and each grindstone shoe 15
A grindstone 17 is attached to. In addition, the tool body 1
Guide members 19 for guiding the honing tool 11 along the machining hole WH of the workpiece W are arranged at equal intervals on the outer peripheral surface of the workpiece 3. The guide member 19 at an appropriate position is measured by an air micrometer. Sizing nozzle 21 as a part
Is provided. Further, a rod 23 having a taper portion 23T for pushing the grindstone shoe 15 radially outward is installed inside the tool body 13 so as to be vertically movable and urged upward.

In the spindle 1, the rod 23
A fluid pressure cylinder 27 having a push rod 25 for pushing down is installed. Further, the spindle 1 is provided with an air supply passage (air pipe) 31 connectable to an air passage (air pipe) 29 connected to the sizing nozzle 21 of the honing tool 11, and the air supply passage 31 is It is connected to an air source (not shown).

An air pressure sensor (A / E converter) 33 is provided near the lower end of the spindle 1 to detect the back pressure when air is ejected from the sizing nozzle 21. Further, at a position close to the air pressure sensor 33, the tool main body 1 is to detect the temperature of the tool main body 13 itself.
3, a connection terminal 37 to be embedded in the temperature sensor 35 is provided, an amplifier (not shown) for the air pressure sensor 33 and the temperature sensor 35, and a transmitter 39 are provided, and the transmitter is provided. A battery 41 is provided as a power source for 39 and the like.

Referring to FIG. 2, a receiver 43 is provided corresponding to the transmitter 39, and the receiver 43 has a pressure,
It is connected to an arithmetic processing unit 45 for calculating the temperature. Further, a temperature sensor 49 is provided on a master ring 47 whose inside diameter is processed with high precision in advance, and this temperature sensor 49 is connected to the arithmetic processing unit 45 via an amplifier 51. The arithmetic processing unit 45 is connected to the honing control circuit 53, and the honing control circuit 53 is connected to the rotation angle detector 9 and the stroke position detector 7.

In the above structure, the honing tool 11 is positioned in the master ring 47 whose inner diameter is machined with high precision in advance, and air is supplied from the sizing nozzle 21 provided in the honing tool 11 to the inner peripheral surface of the master ring 47. By detecting the back pressure at the time of jetting with the air pressure sensor 33, the gap size between the inner peripheral surface of the master ring 47 and the sizing nozzle 21 can be detected, and the inner circumference of the master ring as a reference can be detected. Sizing nozzle 2 for surface
The position of 1 can be detected.

After the position of the sizing nozzle 21 is detected as described above, the honing tool 11 is processed into the machining hole W of the workpiece W.
It is placed in H and the fluid pressure cylinder 27 is operated to operate the rod 2
3 is pressed down, the grindstone shoe 15 is moved in the radial outward direction, and the grindstone 17 is pressed against the inner peripheral surface of the processing hole WH, the spindle 1 is reciprocated in the axial direction by the linear actuator 3 and the rotary actuator 5 is used. By rotating the spindle 1, the honing tool 1 performs honing of the machined hole WH.

After honing as described above,
The back pressure when air is ejected from the sizing nozzle 21 as the measuring portion of the air micrometer provided in the honing tool 1 to the inner peripheral surface of the machining hole WH is detected by the air pressure sensor 33, and thus the machining hole WH is processed. It is possible to measure the gap size between the inner peripheral surface of the and the sizing nozzle 21,
It is possible to detect the processing state of whether or not the diameter of the processing hole WH is within the allowable value.

When the machining state of the machining hole WH is detected as described above, the amount of movement of the spindle 1 from the reference position in the axial direction of the spindle 1 is detected by the linear scale 7. Sizing nozzle 21
The position of can be detected. In this case, the positional relationship between the sizing nozzle 21 and the upper end of the processing hole WH when the spindle 1 is positioned at the reference position in the axial direction is to be measured in advance.

Further, when the spindle 1 is rotated by the rotary actuator 5, the rotation angle detector 9 detects the rotation angle position from the reference position (origin position) in the rotation direction to rotate the measurement position with respect to the origin position. The angular position can be detected.

Therefore, the spindle 1 is rotated by a predetermined angle at a plurality of positions in the axial direction of the machined hole WH to machine the machined hole W.
By measuring the diameter of H, a slight distortion of the processed hole WH can be three-dimensionally detected. Therefore, the direction in which distortion is likely to occur during the honing process can be grasped, and this can be useful for quality control improvement. Further, by three-dimensionally detecting the minute distortion of the machined hole WH, it can be understood that the distortion is caused by the characteristics of the honing tool 1, for example, and it is effective in improving the quality control and managing the life of the honing tool 1. It can be useful.

When the back pressure is detected by ejecting air from the sizing nozzle 21 of the honing tool 1 as described above,
Since the air pressure sensor 33 is provided near the lower end of the spindle 1 and is provided close to the sizing nozzle 21,
The line resistance of the air pipe is small, and the rise of the back pressure can be detected quickly and with high sensitivity.

As described above, when the processing state of the processing hole WH is detected, the temperature sensor 35 provided in the tool body 13 can measure the temperature of the tool body 13 itself. Further, the temperature of the master ring 47 can be measured by the temperature sensor 49 provided on the master ring 47. The master ring 47 is a workpiece W
Is arranged on the upper side of the workpiece W, and the coolant to be applied to the workpiece W is simultaneously applied thereto, and the temperature of the workpiece W is always kept substantially equal to the temperature of the workpiece W. Therefore, measuring the temperature of the master ring 47 is almost the same as measuring the temperature of the workpiece W.

Therefore, it is possible to input the detected temperature of the honing tool 11 and the detected temperature of the master ring 47 into the arithmetic processing unit 45, and perform arithmetic processing of temperature correction (correction processing of thermal expansion) with respect to the reference temperature of 20 ° C., for example. Therefore, the processing accuracy can be easily maintained and managed.

Since the detected value of the air pressure sensor 33 and the detected value of the temperature sensor 35 of the honing tool 1 when the air is ejected from the sizing nozzle 21 can be transmitted to the receiver 43 by the transmitter 39, the spindle The configuration such as wiring for 1 is simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a schematic configuration of a honing tool according to the present invention.

FIG. 2 is a block diagram schematically showing the configuration of an apparatus according to the present invention.

FIG. 3 is an explanatory diagram showing a configuration of a conventional honing tool.

[Explanation of symbols]

 1 Spindle 7 Stroke Position Detector 9 Rotation Angle Detector 11 Honing Tool 13 Tool Body 21 Sizing Nozzle 33 Air Pressure Sensor 35 Temperature Sensor 39 Transmitter 47 Master Ring 49 Temperature Sensor W Workpiece WH Machining Hole

Claims (8)

[Claims] 1. A honing tool attached to an end of a spindle of a honing machine performs honing of a hole to be machined in a workpiece, and then a fixed-size nozzle as a measuring portion of an air micrometer provided in the honing tool. When measuring the diameter of the machining hole by detecting the back pressure when air is ejected to the inner peripheral surface of the machining hole, the position of the honing tool with respect to the axial direction of the machining hole and the rotation of the honing tool with respect to the machining hole. A honing processing state detection method characterized by detecting an angular position. 2. The honing processing state detecting method according to claim 1, wherein the temperature of the honing tool and the temperature of the workpiece are measured when the diameter of the machined hole of the workpiece is measured. 3. A honing machine comprising a spindle at the tip of which a honing tool is attachable / detachable and replaceable so as to be rotatable and reciprocally movable in the axial direction, and a rotation angle detector for detecting a rotation angle of the spindle, and a spindle. A honing machine comprising: a stroke position detector that detects a reciprocating position in the axial direction. 4. The invention according to claim 3, wherein an air pressure sensor for detecting back pressure when air is ejected from a sizing nozzle provided in the honing tool is provided near the tip of the spindle. A honing board characterized by that. 5. The invention according to claim 4, wherein an amplifier for the air pressure sensor, an oscillator for transmitting the detection value of the air pressure sensor, and a power source for the amplifier and the oscillator are provided on the spindle. Honing board to do. 6. The honing machine according to claim 5, wherein the oscillator also serves as an oscillator that transmits a detection value of a temperature sensor included in the honing tool. 7. A honing tool for honing a hole to be machined in a workpiece, comprising a temperature sensor for measuring the temperature of the honing tool itself. 8. A master ring whose inside diameter is machined with high precision in advance, comprising a temperature sensor for measuring the temperature of the master ring itself.