CN212806802U - Small-range comparator for measuring space size of precise spherical surface - Google Patents
Small-range comparator for measuring space size of precise spherical surface Download PDFInfo
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- CN212806802U CN212806802U CN202021254777.8U CN202021254777U CN212806802U CN 212806802 U CN212806802 U CN 212806802U CN 202021254777 U CN202021254777 U CN 202021254777U CN 212806802 U CN212806802 U CN 212806802U
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Abstract
A small range comparator for measuring precision spherical space dimensions, comprising: the device comprises a base, a pressing ring, a steel ball, a measuring rod, a damping pad, a diaphragm and a tool setting gauge. The tool setting appearance fixed mounting is in the inside of base, and from lower supreme, base, clamping ring, measuring staff connect gradually. The base is in threaded connection with the pressure ring, and the pressure ring is inserted into the measuring rod; and a damping pad and a diaphragm are sequentially and fixedly mounted on the end face of the measuring rod facing one side of the compression ring. The workpiece to be measured and the steel ball are sequentially placed from the upper surface of the pressure ring fixing hole; the aperture of the fixing hole is larger than the major diameter of the screw column section of the workpiece to be measured and smaller than the outer diameter of the screw head of the workpiece to be measured. The end face of the compression ring, which faces one side of the tool setting gauge, is used as a reference plane B; the axis of the fixing hole is vertical to the reference plane B; the thickness of the diaphragm is determined according to the theoretical size of the workpiece to be measured. The utility model provides a small-range comparator of precision measurement sphere space dimension which is small in size, light in weight, simple in structure and convenient to use.
Description
Technical Field
The utility model relates to a measure accurate sphere space dimension's small range comparator belongs to precision measurement instrument technical field. The device can be used for directly measuring the fit dimension of precise spherical surfaces such as intelligent instruments, sensors, electrical switches, electric connectors and the like, can replace some vertical optical comparators with high use requirements and complex structures, and can also replace non-contact three-dimensional measuring instruments and the like.
Background
In the actual work of precision machine manufacturing, measurement of some spatial dimensions such as a special-shaped surface, a spherical surface and the like is often encountered, and these dimensions cannot be directly measured, and because no suitable measurement means is available, sampling inspection by some other test equipment or measurement by instrument equipment such as a non-contact three-dimensional measuring instrument, a universal tool microscope and the like is needed in the machining process. Although the devices are advanced, the device has no superiority for measuring the size of a small-sized special-shaped structure, not only wastes time and labor, but also has long period, low measurement efficiency and inaccurate measurement, and directly restricts the scientific research and production.
The measurement of parts by a conventional comparator is generally performed according to a comparative measurement method, that is, a gauge block group is firstly placed between a measuring head and a worktable of the instrument, an indicator of the instrument is adjusted to reach a zero position by a dimension L of the gauge block, a workpiece is placed between the measuring head and the worktable, an offset of the gauge to the zero position, namely a difference value Δ H of a height of the workpiece to the dimension of the gauge block, is read from the indicator, and then the height of the workpiece to be measured is L + Δ H.
Therefore, for the measurement of small and precise spherical dimensions, this measurement method has serious drawbacks:
1) the special-shaped parts are not easy to clamp and fix, and the operation is inconvenient;
2) sometimes, the optical profile scanning is inaccurate, the reading error is large, and the repetition precision is low;
3) the measuring efficiency is low, the time and the labor are wasted, and the production requirement can not be met.
SUMMERY OF THE UTILITY MODEL
The technical solution problem of the utility model is that: the small-range comparator for measuring the space size of the precise spherical surface is provided, the problems of quick and accurate clamping and measurement of a small precise special-shaped structural part can be solved, and the problems of inconvenience, inaccuracy and low efficiency of measurement of a common method can be solved; the problem of insufficient quick measuring tools for special parts is solved, and some non-standard special measuring tools, especially some domestic replacement problems of high-precision testing equipment are solved.
The technical scheme of the utility model is that:
a small range comparator for measuring precision spherical space dimensions, comprising: the device comprises a base, a pressure ring, a steel ball, a measuring rod, a damping pad, a diaphragm and a tool setting gauge;
the tool setting gauge is fixedly arranged in the base,
the base, the pressure ring and the measuring rod are sequentially connected from bottom to top;
the base is in threaded connection with the pressure ring, and the pressure ring is inserted into the measuring rod;
the end face of the measuring rod, which faces one side of the compression ring, is fixedly provided with a damping pad and a diaphragm in sequence;
the center of the bottom of the pressure ring is provided with a light hole which is used as a fixing hole;
the workpiece to be measured includes: screw heads and studs; a spherical groove is processed on the bottom surface of the stud, the spherical diameter of the steel ball is matched with the inner diameter of the spherical groove, and the diameter of the spherical groove is smaller than the major diameter of the stud section of the workpiece to be measured;
the workpiece to be measured and the steel ball are sequentially placed from the upper surface of the pressure ring fixing hole; the aperture of the fixing hole is larger than the major diameter of the screw column section of the workpiece to be measured and smaller than the outer diameter of the screw head of the workpiece to be measured;
the end face of the compression ring, which faces one side of the tool setting gauge, is used as a reference plane B; the axis of the fixing hole is vertical to the datum plane B;
the thickness of the diaphragm is determined according to the theoretical size of the workpiece to be measured.
Compared with the prior art, the utility model beneficial effect be:
1) the utility model has template measuring blocks, fixed holes, no need of combination reference and no need of special fixture, thus having high testing efficiency;
2) the fixed clamping state of the comparator testing part is consistent with the assembling and using states of the part, so the reliability and the accuracy of the measurement are higher;
3) the utility model has simple structure, skillfully applies the functions of leveling, zeroing, positioning and digital display of the tool setting gauge, and has low manufacturing cost;
4) the utility model uses the meter type mechanism to replace the scale to mark, has convenient reading and accurate numerical value, and can measure the precision of +/-5 mu m; the stability is good, the anti-interference ability is strong, the measuring accuracy is high, and the device is a very practical measuring device.
Drawings
FIG. 1 is a schematic view of the appearance main body structure of the small-range comparator of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3(a) is a schematic structural diagram of a workpiece to be tested;
fig. 3(b) is a top view of the workpiece to be measured.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a measure accurate sphere space dimension's small-scale range comparator, as shown in figure 1, include: the device comprises a base 1, a pressure ring 2, a steel ball 3, a measuring rod 4, a damping pad 5, a diaphragm 6 and a tool setting gauge 8. The tool setting gauge 8 is fixedly arranged inside the base 1, and the base 1, the pressure ring 2 and the measuring rod 4 are sequentially connected from bottom to top; threaded connection between base 1 and clamping ring 2, peg graft between clamping ring 2 and the measuring staff 4. The measuring rod 4 is sequentially and fixedly provided with a damping pad 5 and a diaphragm 6 on the end face facing one side of the compression ring 2, and the center of the bottom of the compression ring 2 is provided with a light hole which is used as a fixing hole.
As shown in fig. 3(a) and 3(b), the workpiece 7 to be measured includes: screw heads and studs. A spherical groove is processed on the bottom surface of the stud, the spherical diameter of the steel ball 3 is matched with the inner diameter of the spherical groove, and the diameter of the spherical groove is smaller than the major diameter of the stud section of the workpiece 7 to be measured;
the workpiece 7 to be measured and the steel ball 3 are sequentially placed in the pressing ring 2 from the upper part of the fixing hole; the aperture of the fixing hole is larger than the major diameter of the screw column section of the workpiece to be measured 7 and smaller than the outer diameter of the screw head of the workpiece to be measured 7;
the end face of the compression ring 2, which faces one side of the tool setting gauge 8, is used as a reference surface B; the axis of the fixing hole is vertical to the datum plane B; the thickness of the membrane 6 is determined according to the theoretical dimensions of the workpiece 7 to be measured.
The thickness of the diaphragm 6 meets the condition that after the workpiece 7 to be measured and the steel ball 3 are inserted into the fixing hole, the theoretical position of the lowest point of the steel ball 3 is located on the reference surface B.
The top opening of the base 1 is internally threaded.
The side wall of the pressure ring 2 is provided with an external thread matched with the internal thread of the base 1. The upper end face of the pressure ring 2 is provided with a counter bore, and the counter bore of the pressure ring 2 is matched with the bottom inserting section of the measuring rod 4. The aperture of the counter bore of the pressure ring 2 is in clearance fit with the outer wall of the bottom insertion section of the measuring rod 4.
The diaphragm 6 is made of a magnetic material. The base 1 and the measuring rod 4 are made of martensitic stainless steel, and the surfaces of the base 1 and the measuring rod are plated with nickel. The pressure ring 2 is made of alloy gauge steel.
The measuring rod 4 applies proper axial force to adjust the clamping force of the part, the tightness degree of the test and the contact gap, and the diaphragm 6 serves as a measuring head to ensure that the part is stressed reasonably and uniformly, so that the measured workpiece 7 is in a complete clamping and fixing state and a complete stressed state and is free of mechanical damage. The damping rubber 5 prevents impact and vibration, and prevents the deformation of parts due to improper stress. The axial force drives the steel ball 3 to move downwards, so that the compression displacement of the reference surface is generated and displayed by the tool setting gauge.
The utility model discloses an utilize the relative method to carry out the length measurement instrument of measuring, the corner that will be surveyed the work piece and become the pointer for reference dimension's change through the shifter shows from the gauge outfit. In actual practice, the measurement size is broken down into two parts: integer part + fractional part; the integer part is fixed and is fixed through a reference; the decimal part of the protruding model is displayed by a dial indicator, and the sum of the decimal part and the dial indicator is the space size of the special-shaped part. Part is measured to conventional comparator to need use a large amount of gage block combinations to reach the zero-bit with the dial gage of gage block size L adjustment instrument, and the utility model discloses a length comparator has set for reference dimension (6 thickness of diaphragm are as the length standard, have replaced the gage block) on diaphragm 6 in advance, has integrated, need not go alone to establish the reference gage block. If the steel ball 3 is forced to move downwards along the axis, the offset of the zero position, namely the difference Δ H of the height of the workpiece to the reference dimension, can be read from the indicator, and the height of the workpiece 7 to be measured is L, where L is H + Δ H is H1+ H2. Wherein, H is the theoretical value corresponding to L in fig. 3(a), namely the theoretical value from the lower end face of the screw head of the workpiece 7 to the lowest point of the steel ball 3.Δ H is the dial gauge measurement. As shown in fig. 1, h1 is the distance measurement value from the lower end face of the screw head of the workpiece 7 to the lowest point of the steel ball 3, and the lower end face of the screw head of the workpiece 7 abuts against the bottom face of the counter bore of the compression ring 2; h2 is the distance measurement from reference plane B to the lowest point of ball 3.
The utility model discloses a length comparator structurally adopts built-in fixed part's mode, can solve the problem of test datum very conveniently, measures the problem of clamping location, and the location is looked for easily, no matter whether the appearance of part is regular. The small-range comparator for measuring the precise spherical space dimension solves the problem of precise measurement of the important spherical space dimension of the stud in the light bait assembly, and ensures that the error of the spherical space dimension is accurate to +/-5 mu m.
Examples
As shown in fig. 1 and 2, the small-range comparator for precisely measuring the spherical space dimension of the utility model consists of a base 1, a pressure ring 2, a steel ball 3, a measuring rod 4, a damping pad 5, a diaphragm 6, a tool setting gauge 8 and the like. The lower end of the base 1 serves as a support, the tool setting gauge 8 is fixed in the middle, and the compression ring 2 is screwed tightly, so that the tool setting gauge 8 is constrained in vertical displacement, and the zero position is adjusted. The bottom surface of the pressure ring 2 is a finish machining plane, and the pressure ring provides a measuring reference for the measuring instrument after being assembled and bears the axial force borne by the measuring instrument.
The structural implementation scheme is represented by figure 3, and the specific implementation steps are as follows:
1. during measurement, the thickness and the levelness of the diaphragm 6 are corrected;
2. firstly, adjusting the bottom surface of a pressure ring 2 on a platform to be tightly attached to the upper end surface of a tool setting gauge 8, and adjusting a dial indicator to a zero position; when the reference surface B is attached to the upper end surface of the tool setting gauge 8, the dial indicator corresponds to a zero position;
3. the steel ball 3 and the workpiece 7 to be detected are arranged in the fixed hole position on the pressure ring 2;
4. as shown in fig. 2, the pressure of the workpiece is adjusted by using an adjusting screw 9 through a diaphragm 6 and a damping pad 5 to press the workpiece tightly, and the workpiece 7 to be tested is tightly attached to a test reference surface B, so that a gap is eliminated; a through hole is formed in the center of the compression ring 2 and serves as a fixing hole, the verticality and the surface precision of the fixing hole can ensure that a part is clamped in place, the axis is vertical to the spherical surface, meanwhile, the end face of the measured workpiece 7 is attached to a measuring reference surface B of the measuring instrument, and the measuring error caused by the fact that the clamping is not in place is reduced;
5. the measuring rod 4 moves linearly along the axial direction of the inner hole of the compression ring 2 by uniformly applying force, so that a measuring force without lateral torsion is provided, the steel ball 3 and the measured workpiece 7 are driven to move downwards with small clearance, at the moment, the steel ball 3 protrudes out of the bottom surface of the compression ring 2 and is conducted to the upper end surface of the tool setting gauge to move downwards, and the tool setting gauge is converted into a pointer rotating angle through a dial indicator; the protruding amount is the stroke amount of the upper end surface of the tool setting gauge 8, is the decimal part of the length of the part, and is indicated by a pointer;
6. the addition of the reference dimension to this projection dimension is the measured dimension of the part.
Therefore, the problems of quick and accurate clamping and measurement of the small precise special-shaped structural part are solved; the use is flexible and convenient, and each measurement only needs to set a reference size according to the measured size and replace the related diaphragm 6.
In the scheme, the size precision and the form and position precision of each part are required to be higher, and certain requirements are also required on material selection; the diaphragm 6 can be made of magnetic materials, can adsorb parts, is convenient to clamp and disassemble, has high surface processing precision and has vibration absorption and impact resistance; the base 1 and the measuring rod 4 can be made of martensitic stainless steel and are plated with nickel, so that the appearance is attractive, wear-resistant and corrosion-resistant; the compression ring 2 is made of alloy gauge steel, has a small thermal expansion coefficient and a stable material structure, and is subjected to aging treatment to further stabilize the size.
Those skilled in the art will appreciate that the details of the present invention not described in detail herein are well within the skill of those skilled in the art.
Claims (10)
1. The utility model provides a measure accurate sphere space dimension's small-scale range comparator which characterized in that includes: the device comprises a base (1), a pressure ring (2), a steel ball (3), a measuring rod (4), a damping pad (5), a diaphragm (6) and a tool setting gauge (8);
the tool setting gauge (8) is fixedly arranged in the base (1);
the base (1), the pressure ring (2) and the measuring rod (4) are sequentially connected from bottom to top;
the base (1) is in threaded connection with the pressure ring (2), and the pressure ring (2) is inserted into the measuring rod (4);
the end face of the measuring rod (4) facing one side of the compression ring (2) is sequentially and fixedly provided with a damping pad (5) and a diaphragm (6);
the center of the bottom of the compression ring (2) is provided with a light hole which is used as a fixing hole;
the workpiece (7) to be measured includes: screw heads and studs; a spherical groove is processed on the bottom surface of the stud, the spherical diameter of the steel ball (3) is matched with the inner diameter of the spherical groove, and the diameter of the spherical groove is smaller than the major diameter of the stud section of the workpiece to be measured (7);
the workpiece (7) to be measured and the steel ball (3) are sequentially placed in the pressing ring (2) fixing hole; the aperture of the fixing hole is larger than the major diameter of the stud section of the workpiece (7) to be measured and smaller than the outer diameter of the screw head of the workpiece (7) to be measured;
the end face of the compression ring (2) facing one side of the tool setting gauge (8) is used as a reference surface B; the axis of the fixing hole is vertical to the datum plane B;
the thickness of the membrane (6) is determined according to the theoretical size of the workpiece (7) to be measured.
2. The small-range comparator for measuring the space size of the precise spherical surface according to claim 1, wherein the thickness of the diaphragm (6) satisfies that the theoretical position of the lowest point of the steel ball (3) is located on the reference surface B after the workpiece (7) to be measured and the steel ball (3) are inserted into the fixing hole.
3. The small-range comparator for measuring the space size of precise spherical surface according to claim 2, characterized in that the top opening of the base (1) is internally threaded.
4. The small-range comparator for measuring the space size of the precise spherical surface according to claim 3, wherein the side wall of the pressure ring (2) is provided with an external thread matched with the internal thread of the base (1).
5. The small-range comparator for measuring the space size of the precise spherical surface according to any one of claims 2 to 4, characterized in that a counter bore is formed in the upper end surface of the pressure ring (2), and the counter bore of the pressure ring (2) is matched with the bottom insertion section of the measuring rod (4).
6. The small-range comparator for measuring the space size of the precise spherical surface according to claim 5, wherein the aperture of the counter bore of the pressure ring (2) is in clearance fit with the outer wall of the bottom insertion section of the measuring rod (4).
7. The small-range comparator for measuring the space size of a precise spherical surface according to any one of claims 2 to 4, wherein the diaphragm (6) is made of a magnetic material.
8. The small-range comparator for measuring the space size of the precise spherical surface according to any one of claims 2 to 4, wherein the base (1) and the measuring rod (4) are made of martensitic stainless steel.
9. The small-range comparator for measuring the space size of the precise spherical surface according to any one of claims 2 to 4, characterized in that the surfaces of the base (1) and the measuring rod (4) are plated with nickel.
10. The small-range comparator for measuring the space size of the precise spherical surface according to any one of claims 2 to 4, characterized in that the pressure ring (2) is made of alloy gauge steel.
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| CN202021254777.8U CN212806802U (en) | 2020-06-30 | 2020-06-30 | Small-range comparator for measuring space size of precise spherical surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485343A (en) * | 2021-12-20 | 2022-05-13 | 无锡鹰贝精密液压有限公司 | Check tool for detecting sealing spherical surface of one-way valve element |
| CN114485344A (en) * | 2021-12-20 | 2022-05-13 | 无锡鹰贝精密液压有限公司 | Engine idler combination examines utensil |
-
2020
- 2020-06-30 CN CN202021254777.8U patent/CN212806802U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114485343A (en) * | 2021-12-20 | 2022-05-13 | 无锡鹰贝精密液压有限公司 | Check tool for detecting sealing spherical surface of one-way valve element |
| CN114485344A (en) * | 2021-12-20 | 2022-05-13 | 无锡鹰贝精密液压有限公司 | Engine idler combination examines utensil |
| CN114485343B (en) * | 2021-12-20 | 2023-08-18 | 无锡鹰贝精密液压有限公司 | Check tool for check valve element sealing spherical surface detection |
| CN114485344B (en) * | 2021-12-20 | 2023-08-22 | 无锡鹰贝精密液压有限公司 | Engine idler wheel combination gauge |
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