CN111189375A - Hole diameter measuring device and measuring method - Google Patents
Hole diameter measuring device and measuring method Download PDFInfo
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- CN111189375A CN111189375A CN202010141679.1A CN202010141679A CN111189375A CN 111189375 A CN111189375 A CN 111189375A CN 202010141679 A CN202010141679 A CN 202010141679A CN 111189375 A CN111189375 A CN 111189375A
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- measuring
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- hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
Abstract
The invention relates to the technical field of geometric quantity measurement, in particular to a hole cavity diameter measuring device; the adopted technical scheme is as follows: a hole diameter measuring device comprises a measuring rod, wherein a ball head is arranged at one end of the measuring rod, a displacement sensor is arranged at the other end of the measuring rod, and a displacement rod of the displacement sensor can slide along the length direction of the measuring rod; still include the push rod, push rod one end is articulated with the measuring staff middle part. When the displacement sensor is used, the size of a groove or a hole with known size is measured, and the displacement sensor is cleared; then the measuring device is sent into the target hole cavity to enable the ball head to be in contact with the side wall of the hole cavity, the measuring rod is pushed to enable the measuring rod to rotate around the contact point of the ball head and the part, the minimum value of the displacement sensor in the rotating process is measured, and the diameter of the target cavity can be measured. The method can ensure the measurement precision and accuracy, and has the characteristics of simple and convenient operation, accurate measurement, repeatability, high measurement precision and portability.
Description
Technical Field
The invention relates to the technical field of geometric quantity measurement, in particular to a hole cavity diameter measuring device and a measuring method.
Background
Large-size (deep) hole parts can be frequently produced in machining and assembling, and in order to detect the quality of machining or assembling, the on-site measurement of the inner diameter of a deep hole is indispensable. Because the aperture is big and the hole is deep, general inside micrometer is difficult for measuring, because when the operator used inside micrometer to measure, generally one hand held the measuring staff of micrometer, then leaned on the work piece with the fixed head, the micrometer head was then rotated to the other hand, felt micrometer head contact part suitable back by the operator, took out the micrometer, observed the reading of micrometer. Therefore, the detection operation process shows that the measurement data cannot be directly seen in the measurement process, so that the operation is inconvenient; meanwhile, in the process of taking out the micrometer, the micrometer head can rotate, so that the measurement precision is lost.
Disclosure of Invention
Aiming at the technical problems of inconvenient operation and low measurement precision of the diameter measurement of the hole cavity of the existing large-size hole, the invention provides the hole cavity diameter measuring device, which is used for automatically allocating and removing zero-removing medicines, ensuring the accuracy of the preparation of the zero-removing medicines and improving the preparation efficiency.
The invention is realized by the following technical scheme:
a hole diameter measuring device comprises a measuring rod, wherein a ball head is arranged at one end of the measuring rod, a displacement sensor is arranged at the other end of the measuring rod, and a displacement rod of the displacement sensor can slide along the length direction of the measuring rod; still include the push rod, push rod one end is articulated with the measuring staff middle part.
When the displacement sensor is used, the size of a groove or a hole with known size is measured, and the displacement sensor is cleared; then the measuring device is sent into the target hole cavity to enable the ball head to be in contact with the side wall of the hole cavity, the measuring rod is pushed to enable the measuring rod to rotate around the contact point of the ball head and the part, the minimum value of the displacement sensor in the rotating process is measured, and the diameter of the target cavity can be measured. In the measuring process, the reading of the detecting device can be observed in real time through the data fed back by the displacement sensor, the operation is simple and convenient, the subjective judgment of a measurer is avoided, the accurate measurement can be carried out, and the repeatability is realized; and the measured value can be recorded in the measuring process, the measuring device does not need to be taken out, and the measuring precision and accuracy can be ensured. The measuring device only comprises the measuring rod and the push rod, and can carry conveniently, and carry out in-situ measurement and field measurement.
Furthermore, the bulb passes through the measuring staff and links to each other, the one end that the measuring staff is connected the measuring staff is equipped with adjustment mechanism, adjustment mechanism is used for adjusting the axiality of measuring staff and displacement rod. The coaxiality of the measuring shaft and the displacement rod is adjusted through the adjusting mechanism, so that the measuring precision and accuracy are ensured.
As a specific implementation mode of the adjusting mechanism, a blind hole is formed in one end, provided with the ball head, of the measuring rod, and the blind hole is used for accommodating the measuring shaft; the measuring shaft is a stepped shaft, a ball is arranged between the large end of the measuring shaft and the bottom of the blind hole, and the measuring shaft can rotate around the ball; the end part of the blind hole is in threaded connection with an adjusting seat, the middle part of the adjusting seat is provided with a through hole, and the through hole is used for allowing the measuring shaft rod part to penetrate through the adjusting seat; a pressure spring is arranged between the adjusting seat and the large end of the measuring shaft and is used for enabling the measuring shaft to compress the ball; the adjusting screw holes are evenly distributed on the circumference of the side wall, located outside the blind hole, of the adjusting seat and communicated with the via holes, the adjusting screw holes are used for being in threaded connection with the adjusting portion, the coaxiality of the measuring shaft and the displacement rod is adjusted through the adjusting portion, the measuring shaft is finely adjusted, and measuring accuracy is guaranteed.
Further, the circumference equipartition of staff portion has a plurality of second notches, the second notch is used for holding the tip of regulating part to prevent to change the length of staff when adjusting the axiality of staff and displacement pole, ensure measuring accuracy.
As a specific embodiment of the adjusting portion, the adjusting portion includes a first adjusting portion and a second adjusting portion; the first adjusting part is a screw rod, a third notch is formed in the middle of the second adjusting part, and an adjusting spring is inserted into the third notch; first regulating part and second regulating part set up along the survey axle circumference interval to simplify the regulation of survey axle, improve measurement of efficiency.
Preferably, the push rods are symmetrically arranged in the length direction of the measuring rod, so that the measuring rod can be clamped by the two push rods, the rapid measurement is facilitated, and the measurement efficiency is improved.
As a specific implementation mode that the push rods are connected with the measuring rod, a U-shaped clamp is sleeved in the middle of the measuring rod, and the end parts of the two push rods are hinged with the corresponding side walls of the U-shaped clamp.
Furthermore, the device also comprises a handle, wherein two sides of the handle are fixedly connected with the end parts of the corresponding push rods so as to facilitate measurement.
As a specific implementation mode of fixedly connecting the displacement sensor and the measuring rod, the displacement sensor is fixed at the end part of the measuring rod through the opening clamp, so that the displacement sensor is convenient to fix and replace, and the cavities with different diameters can be conveniently measured.
The invention also provides a hole cavity diameter measuring method, which adopts the hole cavity diameter measuring device to measure and comprises the following steps:
placing the measuring device between the parallel measuring blocks, and enabling the measuring shaft to be coaxial with the displacement rod through the adjusting mechanism;
measuring the size of a groove or a hole with known size A0 by using a measuring device after adjusting the coaxiality, and clearing the displacement sensor;
and (3) sending the zero-cleared measuring device into the target hole cavity to enable the ball head to be in contact with the side wall of the hole cavity, pushing the measuring rod to enable the measuring rod to rotate around a contact point of the ball head and the part, recording the minimum value of the displacement sensor as A1 in the rotating process, and enabling the diameter of the hole cavity to be A0+ A1.
The invention has the beneficial effects that:
1. in the measuring process, the invention can observe the reading of the detecting device in real time through the data fed back by the displacement sensor, has simple and convenient operation, avoids the subjective judgment of a measurer, and has accurate measuring result and repeatability.
2. The invention can record the measured value in the measuring process without taking out the measuring device, thereby ensuring the measuring precision and accuracy.
3. The measuring device only comprises the measuring rod and the push rod, is convenient to carry, and can carry out in-situ measurement and field measurement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a block diagram of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of section D of FIG. 2;
FIG. 4 is a B-diagram of FIG. 1;
FIG. 5 is a C-diagram of FIG. 1;
fig. 6 is a schematic view of the usage state of the present invention.
Reference numbers and corresponding part names in the drawings:
1-measuring rod, 2-ball head, 3-displacement sensor, 4-displacement rod, 5-push rod, 6-measuring shaft, 7-blind hole, 8-ball, 9-first notch, 10-adjusting seat, 11-via hole, 12-pressure spring, 13-adjusting screw hole, 14-second notch, 15-first adjusting part, 16-second adjusting part, 17-third notch, 18-adjusting spring, 19-U-shaped clamp, 20-handle, 21-articulated shaft, 22-wire clamp, 23-display part watch, 24-front cylinder, 25-middle cylinder, 26-rear cylinder, 27-first protection cylinder, 28-second protection cylinder and 29-fourth notch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
The hole diameter measuring device comprises a measuring rod 1, wherein a ball head 2 is arranged at one end of the measuring rod 1, and a displacement sensor 3 is arranged at the other end of the measuring rod 1. In the present embodiment, the measuring bar 1 is composed of a front barrel 24, a middle barrel 25 and a rear barrel 26, specifically:
the front barrel 24 is of a hollow semicircular pipe structure, an opening clamp is arranged at the upper end of the front barrel, the displacement sensor 3 can be fixed by screwing the opening clamp through a screw, the displacement sensor 3 is convenient to fix and replace, the position of the displacement sensor 3 is also convenient to adjust, so that the pore spaces with different diameters can be measured, and the displacement sensor 3 is an inductive displacement sensor. The tail end of the front barrel 24 is provided with an optical axis and is provided with a ring groove, preferably a ring groove with a triangular section.
Meanwhile, a plurality of screw holes are uniformly distributed in the circumferential direction on the middle barrel 25, and the conical end fastening screws act on the annular grooves of the front barrel, so that the middle barrel 25 and the front barrel 24 can be fixedly connected. Similarly, the middle cylinder 25 is also a hollow circular tube, two ends of the middle cylinder are stepped holes, one side of the middle part of the middle cylinder is provided with a groove, and the length of the groove on the side wall of the middle cylinder 25 is about 1.8 times of the length of the displacement rod 4 of the displacement sensor 3, so that the displacement sensor 3 can be installed in the front cylinder 24 from the groove.
One end of the rear barrel 26 is a stepped shaft, a ring groove is also processed on the small shaft of the rear barrel 2, and the ring groove is matched with conical end set screws uniformly distributed at the tail end of the middle barrel 25 to realize the connection of the rear barrel 26 and the middle barrel 25. The other end of the rear cylinder 26 is provided with a blind hole 7, a fourth pit 29 (usually a central hole, a tip hole and the like) is arranged at the bottom of the blind hole 7, a measuring shaft 6 is inserted into the blind hole 7, and the ball head 2 is connected with the measuring rod 1 through the measuring shaft 6.
The measuring shaft 6 is a stepped shaft, the ball 8 is arranged between the large end of the measuring shaft 6 and the bottom of the blind hole 7, the measuring shaft 6 can rotate around the ball 8, similarly, the large end of the measuring shaft 6 is provided with a first notch 9, a cavity surrounded by the first notch 9 and a fourth notch 29 is used for accommodating the ball 8, and an adjusting gap is reserved between the bottom of the blind hole 7 and the large end of the measuring shaft 6. The end part of the blind hole 7 is screwed with an adjusting seat 10, the middle part of the adjusting seat 10 is provided with a via hole 11, and the via hole 11 is used for allowing the rod part of the measuring shaft 6 to pass through the adjusting seat 10. A pressure spring 12 is arranged between the adjusting seat 10 and the large end of the measuring shaft 6, and the pressure spring 12 is used for enabling the measuring shaft 6 to compress the ball 8 to form a ball head pair, so that 360-degree adjustment can be carried out on the measuring shaft 6.
The specific structure of the adjusting measuring shaft 6 is as follows: the adjusting seat 10 is provided with adjusting screw holes 13 uniformly distributed on the circumference of the side wall outside the blind hole 7, in this embodiment, the adjusting seat 10 is also a step shaft, and the adjusting screw holes 13 are arranged on the large end of the adjusting seat 10. Adjusting screw hole 13 and via hole 11 intercommunication, adjusting screw hole 13 is used for the spiro union regulating part, adjusts the axiality of survey axle 6 and displacement pole 4 through the regulating part to ensure measuring precision and accuracy.
Preferably, 6 pole parts of staff are equipped with a plurality of second notches 14, that is to say, the circumference equipartition has a plurality of little keyways on the staff 6 tip for hold the tip of regulating part, in order to prevent to change the length of staff when adjusting staff 6 and displacement rod 4's axiality, ensure measuring accuracy.
As a specific embodiment of the adjustment portion, the adjustment portion includes a first adjustment portion 15 and a second adjustment portion 16; the first adjusting part is a screw rod 15, a third notch 17 is arranged in the middle of the second adjusting part 16, and an adjusting spring 18 is inserted in the third notch 17; the first adjusting portion 15 and the second adjusting portion 16 are arranged at intervals along the circumference of the spindle 4. It can be understood that the second adjusting part 16 is provided with a blind hole and two nuts, namely, the two first adjusting parts 15 and the second adjusting parts 16 are distributed in a cross shape, so that the adjustment of the measuring shaft is simplified, and the measuring efficiency is improved.
Preferably, the two push rods 5 are symmetrically arranged in the length direction of the measuring rod 1, so that the two push rods 5 can clamp the measuring rod 1, rapid measurement is facilitated, and the measurement efficiency is improved. As a specific implementation mode that the push rod 5 is connected with the measuring rod 1, a U-shaped clamp 19 is sleeved in the middle of the measuring rod 1, and the end parts of the two push rods are hinged with the corresponding side walls of the U-shaped clamp. It will be appreciated that the push rod 5 may be hinged to the clevis 19 by means of a pin or rivet, and in this embodiment, the clevis 9 and the push rod 5 are hinged by means of a hinge shaft 21, the hinge shaft 21 being stepped, the head being a thread, the middle optical axis, and the tail being a nut. The U-shaped clamp 9 is an open U-shaped clamp, a through hole is formed in the side face of the U-shaped clamp, the two hinge shafts 21 are symmetrically arranged on the middle barrel 25 through the through hole in the U-shaped clamp 9, and a hole in one end of the push rod 5 is in clearance fit with an optical axis on the push rod 5 and can rotate around the optical axis.
In addition, the other end of the push rod 5 is fixedly connected with a handle 20 through a screw, and the displacement sensor 3 is installed in the front barrel 24 through the handle 20, a gap between the two push rods 5, the U-shaped clamp 19 and an open slot on the middle barrel 25 and is fixed by the open clamp on the front barrel 24. The wires of the displacement sensor 3 are fixed on the middle cylinder 25 by the wire clamps 22, so that the wires do not affect the accuracy of the inductive displacement sensor when the handle 20 moves. While the readings of the inductive displacement sensor 3 are displayed by the display meter 23 outside the bore. The protective device further comprises a first protective barrel 27 and a second protective barrel 28, wherein the first protective barrel 27 and the second protective barrel 28 are sleeved on the front barrel 24, the middle barrel 25 and the rear barrel 26 to play a protective role.
The method for measuring the diameter of the hole cavity comprises the following steps:
s1, determining the position of the displacement sensor 3 according to the measured stroke, and screwing the screw of the opening clamp on the front barrel 24 to fix the displacement rod 4 of the displacement sensor 3;
s2, taking the axial direction of the displacement rod 4 as the Z direction, placing the measuring device between the parallel gauge blocks, fixing the measuring rod to enable the measuring rod 1 to move only along the Z direction, and respectively finely adjusting the adjusting part of the adjusting seat 10, namely adjusting the measuring shaft 6 to swing along the X or Y direction, thereby adjusting the position of the sphere center of the ball head 2; when the reading of the display table 23 is minimum, the coaxial adjustment is achieved;
s3, measuring the size of the groove or hole with the known size A0 by the adjusted detection device, and clearing the display table 23;
s4, when the handle 20 is held, the thumb and the forefinger respectively exert certain force on the push rod 5, the U-shaped clamp 19 is clamped under the action of the force, and then the measuring device is moved into the target hole cavity, so that the ball head 2 is in contact with the surface of a part;
s5, loosening the push rod 5, only holding the handle 20, slightly pushing the measuring rod 1, enabling the measuring rod 1 to rotate around the contact point of the ball head 2 and the part, enabling the end part of the displacement rod 4 of the displacement sensor 3 to contact the other side of the part, and in the rotating process, displaying the minimum value A1, wherein the diameter of the hole cavity is A0+ A1.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The hole cavity diameter measuring device is characterized by comprising a measuring rod (1), wherein a ball head (2) is arranged at one end of the measuring rod (1), a displacement sensor (3) is arranged at the other end of the measuring rod (1), and a displacement rod (4) of the displacement sensor (3) can slide along the length direction of the measuring rod (1); the measuring rod is characterized by further comprising a push rod (5), wherein one end of the push rod (5) is hinged with the middle of the measuring rod (1).
2. The bore diameter measuring device according to claim 1, characterized in that the ball head (2) is connected with the measuring rod (1) through a measuring shaft (6), and an adjusting mechanism is arranged at one end of the measuring rod (1) connected with the measuring shaft (6) and used for adjusting the coaxiality of the measuring shaft (6) and the displacement rod (4).
3. The bore diameter measuring device according to claim 2, characterized in that the measuring rod (1) is provided with a blind hole (7) at the end where the ball head (2) is arranged, and the blind hole (7) is used for accommodating the measuring shaft (6);
the measuring shaft (6) is a stepped shaft, a ball (8) is arranged between the large end of the measuring shaft (6) and the bottom of the blind hole (7), and the measuring shaft (6) can rotate around the ball (8);
an adjusting seat (10) is screwed at the end part of the blind hole (7), a through hole (11) is formed in the middle of the adjusting seat (10), and the through hole (11) is used for enabling the rod part of the measuring shaft (6) to penetrate through the adjusting seat (10);
a pressure spring (12) is arranged between the adjusting seat (10) and the large end of the measuring shaft (6), and the pressure spring (12) is used for enabling the measuring shaft (6) to compress the ball (8);
adjust seat (10) and be located the outside lateral wall circumference equipartition of blind hole (7) and have regulation screw (13), adjust screw (13) and via hole (11) intercommunication, adjust screw (13) and be used for spiro union regulating part, adjust the axiality of measuring spindle (6) and displacement pole (4) through regulating part.
4. The bore diameter measuring device according to claim 3, characterized in that a plurality of second recesses (14) are evenly distributed on the circumference of the shaft part of the measuring shaft (6), and the second recesses (14) are used for accommodating the end parts of the adjusting parts.
5. The bore diameter measurement device according to claim 4, wherein the adjustment portion includes a first adjustment portion (15) and a second adjustment portion (16);
the first adjusting part (15) is a screw rod, a third notch (17) is formed in the middle of the second adjusting part (16), and an adjusting spring (18) is inserted into the third notch (17);
the first adjusting part (15) and the second adjusting part (16) are arranged at intervals along the circumferential direction of the measuring shaft (6).
6. The bore diameter measuring device according to claim 1, characterized in that the push rod (5) is provided in two symmetrically with respect to the length direction of the measuring staff (1).
7. The bore diameter measuring device according to claim 6, characterized in that a U-shaped clamp (19) is sleeved in the middle of the measuring rod (1), and the end parts of the two push rods (5) are hinged with the corresponding side walls of the U-shaped clamp (19).
8. The bore diameter measuring device according to claim 6, further comprising a handle (20), wherein both sides of the handle (20) are fixedly connected with the end portions of the corresponding push rods (5).
9. A bore diameter measuring device according to claim 1, characterized in that the displacement sensor (3) is fixed at the end of the measuring rod (1) by a split clamp.
10. A method for measuring a bore diameter, which is characterized by using the bore diameter measuring apparatus according to any one of claims 1 to 9, comprising the steps of:
the measuring device is placed between the parallel measuring blocks, and the measuring shaft (6) is coaxial with the displacement rod (4) through the adjusting mechanism;
measuring the size of a groove or a hole with known size A0 by using the measuring device after the coaxiality is adjusted, and clearing the displacement sensor (3);
and (3) sending the zero cleared measuring device into a target hole cavity to enable the ball head (2) to be in contact with the side wall of the hole cavity, pushing the measuring rod (1) to enable the measuring rod (1) to rotate around the contact point of the ball head (2) and the part, recording the minimum value of the displacement sensor (3) as A1 in the rotating process, and then recording the diameter of the hole cavity as A0+ A1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141679.1A CN111189375A (en) | 2020-04-14 | 2020-04-14 | Hole diameter measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141679.1A CN111189375A (en) | 2020-04-14 | 2020-04-14 | Hole diameter measuring device and measuring method |
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| Publication Number | Publication Date |
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| CN111189375A true CN111189375A (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010141679.1A Pending CN111189375A (en) | 2020-04-14 | 2020-04-14 | Hole diameter measuring device and measuring method |
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| CN (1) | CN111189375A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678448A (en) * | 2020-06-17 | 2020-09-18 | 江苏南水科技有限公司 | Miniaturized pop-up fiber bragg grating joint meter and packaging method |
-
2020
- 2020-04-14 CN CN202010141679.1A patent/CN111189375A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678448A (en) * | 2020-06-17 | 2020-09-18 | 江苏南水科技有限公司 | Miniaturized pop-up fiber bragg grating joint meter and packaging method |
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