CN214792838U - Micrometer for measuring caliber of taper hole - Google Patents
Micrometer for measuring caliber of taper hole Download PDFInfo
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- CN214792838U CN214792838U CN202120579242.6U CN202120579242U CN214792838U CN 214792838 U CN214792838 U CN 214792838U CN 202120579242 U CN202120579242 U CN 202120579242U CN 214792838 U CN214792838 U CN 214792838U
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Abstract
The utility model discloses a micrometer for measuring the caliber of a taper hole, which comprises a left measuring claw, a right measuring claw, a handle, a locking screw, a fixed sleeve, a micro-cylinder, a force measuring device and a micrometer screw rod; the left measuring claw is a fixed measuring claw, the right measuring claw is a movable measuring claw, and contact surfaces of the left measuring claw and the right measuring claw with a taper hole of a workpiece to be measured, namely measuring surfaces, are oblique cylindrical surfaces or spherical surfaces. When the contact surfaces of the left measuring claw and the right measuring claw with the measuring workpiece are inclined cylindrical surfaces, the measuring claw can be divided into an upper part and a lower part, the lower part is a base I, the upper part is a measuring rod, the upper part of the base I is a stop platform, and the measuring rodThe inclined cylinder has an axis passing through the axis of the substrate I and forming an included angle alpha with the axis of the substrate I, wherein alpha is 90 degrees + theta/2, and theta is 2tan‑1And (C/2), wherein C is the taper of the taper hole of the workpiece. The utility model discloses the micrometer quality is light, easy operation, measurement accuracy are high, can realize on-line measuring when the circular cone hole course of working of single small batch production.
Description
Technical Field
The utility model relates to a precision measurement's measuring tool, in particular to precision measurement measuring tool of taper hole bore.
Background
The cone matching has higher coaxiality, better adjustability, self-locking performance and sealing performance, and wide application, but the cone matching has a complex structure and is difficult to process and inspect. Although the detection methods are many, the effect is poor. Whether the measurement is directly carried out by adopting a universal tool microscope, a three-coordinate instrument and the like; whether the measurement is carried out by a gauge or indirect measurement is carried out by a sine gauge, a steel ball and the like, the method has the following limitations: firstly, the taper holes are detected by using a gauge, and the taper hole detection is not applicable to taper hole detection of single piece small batch production and is not economical; the taper hole gauge with larger diameter has difficulty in on-line measurement operation in the manufacturing process because the gauge is too heavy; secondly, other detection methods require special equipment, and even detection can be performed only by special equipment in a special area, so that the online active measurement cannot be realized except for low efficiency and large workload, and only passive measurement can be performed afterwards. Other detectable detection methods have problems in terms of accuracy, convenience and cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that a micrometer for measuring the caliber of a taper hole and a measuring method thereof are provided. The utility model discloses the micrometer quality is light, easy operation, measurement accuracy are high, can initiatively measure the taper hole diameter and realize on-line measuring when the circular cone hole (especially the great taper hole of diameter) course of working of one-piece small batch production. In addition, use the utility model discloses a micrometer detection efficiency is high, the cost is lower.
The utility model relates to a micrometer for measuring the caliber of a taper hole, which comprises a left measuring claw, a right measuring claw, a handle, a locking screw, a fixed sleeve, a micro-cylinder, a force measuring device and a micro-screw; the left measuring claw is a fixed measuring claw, the right measuring claw is a movable measuring claw, and contact surfaces of the left measuring claw and the right measuring claw with a taper hole of a workpiece to be measured, namely measuring surfaces, are oblique cylindrical surfaces or spherical surfaces.
Furthermore, when the contact surfaces of the left measuring claw and the right measuring claw with the measuring workpiece are inclined cylindrical surfaces, the measuring claws are divided into an upper part and a lower part, and the lower part is a substrate IThe upper part is a measuring rod, the upper part of the base body I is a stop platform, the measuring rod is an oblique cylinder, the axial line of the oblique cylinder passes through the axial line of the base body I, the included angle between the axial line of the oblique cylinder and the axial line of the base body I is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the taper hole of the workpiece; the measuring rod and the substrate I are integrated.
Furthermore, when the contact surfaces of the left measuring claw and the right measuring claw and the measuring workpiece are inclined cylindrical surfaces, the measuring claws are divided into two large measuring claws and two small measuring claws, the large measuring claw is a base body II, the small measuring claw is a measuring body, the upper part of the base body II is a front platform and is provided with an inclined cylindrical hole, the measuring body is an inclined cylinder which is embedded in the inclined cylindrical hole of the base body II, the axial lead of the inclined cylinder passes through the axial lead of the base body II, the included angle between the axial lead of the inclined cylinder and the axial lead of the base body II is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the taper hole of the workpiece; the measuring body and the base body II are split.
Furthermore, when the contact surfaces of the left and right measuring claws and the measuring workpiece are inclined cylindrical surfaces, the measuring claws are divided into a left part and a right part, the right part is a base body III, the rightmost end of the base body III is a straight surface, the upper part of the left end of the base body III is a section of inclined cylinder, and the left part is a stop platform which is connected below the inclined cylinder; the inclined cylinders are symmetrical front and back relative to the axis of the base body III; the included angle between the outermost right external line of the oblique cylinder and the axial lead of the base body III is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the workpiece taper hole; the spigot platform and the base body III are integrated.
Further, the outer measurement angle α of the oblique cylinder, i.e., the measurement column, is 90 ° + θ/2: wherein alpha is measured in the plane of the axis of the measuring column and the axis of the fixed sleeve, namely the included angle between the outside element line and the axis of the fixed sleeve at the outside of measurement; theta is the taper angle of the taper hole, and theta is 2tan-1(C/2); c is that the taper of the taper hole is 1: 5 or 1: 10 or 1: 15 or 1:30, of a nitrogen-containing gas; the seam allowance platforms on the left measuring claw and the right measuring claw are on the same plane and are parallel to the axis of the fixed sleeve.
Further, when the contact surfaces of the left and right measuring claw workpieces are spherical surfaces, the measuring claws are divided into an upper part and a lower part, the lower part is a base body IV, the upper part is a measuring sphere, the upper part of the base body IV is a front opening platform, the main body of the measuring sphere is a spherical Sd, the upper surface, the lower surface and the inner side of the measuring sphere are cut flat, the measuring sphere is fixed on the front opening platform through a screw, the included angle between the axial lead of the screw and the inner side of a vertical line is beta, and the beta is about 5-25 degrees; the seam allowance platforms on the left measuring claw and the right measuring claw are on the same plane and are parallel to the axis of the fixed sleeve.
Furthermore, the measuring claw also comprises an adjusting pad which is arranged between the inner side surface of the measuring sphere and the base body IV.
The utility model provides a technical scheme is: separately detecting the taper error and the diameter error of the taper hole, namely accurately measuring and correcting the taper or the taper angle through an effective way when the workpiece has a margin until the taper and the roundness are qualified and a certain finish machining margin is kept; then before the finish machining process, use the utility model discloses the micrometer measures big-end drill way diameter, confirms finish machining depth of cut, reaches the requirement until the drill way diameter.
The utility model discloses micrometer's beneficial effect is: the micrometer has the advantages of light weight, simple operation, wide measurement range and high measurement precision, is particularly suitable for the online active measurement of single-piece small-batch, high-precision and large-size taper holes, and greatly improves the processing efficiency and the qualification rate of products. In addition, use the utility model discloses a micrometer detection efficiency is high, the cost is lower.
Drawings
The invention will be further explained with reference to the drawings and the detailed description below:
FIG. 1 is a schematic structural view of a micrometer for measuring the caliber of a taper hole according to the present invention;
FIG. 2 is a measuring head of the micrometer with a convex column cap of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a measuring head of the micrometer with embedded column cap of the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a measuring head of the cylindrical head type micrometer of the present invention;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is a first diagram of a measuring head structure of the spherical micrometer of the present invention;
FIG. 10 is a top view of FIG. 9;
FIG. 11 is a second diagram of the measuring head structure of the spherical micrometer of the present invention;
fig. 12 is a top view of fig. 11.
Detailed Description
Example 1
As shown in fig. 1, the micrometer for measuring the caliber of a taper hole of the present invention comprises a left measuring claw 6, a right measuring claw 6, a handle 7, a locking screw 8, a fixing sleeve 10, a micro-cylinder 11, a force measuring device 12 and a micro-measuring screw 13; the left measuring claw 6 is a fixed measuring claw, the right measuring claw 6 is a movable measuring claw, and the contact surfaces of the left and right measuring claws 6 and the taper hole of the workpiece 1 to be measured, namely the measuring surface 3, are oblique cylindrical surfaces or spherical surfaces.
Micrometer as shown in fig. 1: the left measuring claw 6 is a fixed measuring claw which is fixedly sleeved at the left end of the handle 7, and the handle 7 is connected with the left end of the micrometer screw 13 through a locking screw 8; the right measuring claw 6 is a movable measuring claw which is connected with a micrometer screw 13, a threaded shaft sleeve is screwed on the micrometer screw 13, a fixed sleeve 10 is sleeved on the threaded shaft sleeve, one end of a micro-cylinder 11 is sleeved on the fixed sleeve 10, the other end of the micro-cylinder is sleeved on the excircle of the left end of a force measuring device 12 through the shaft sleeve, and the left end of the force measuring device 12 is fixedly connected with the micrometer screw 13 (the threaded shaft sleeve and the shaft sleeve are not shown in the figure).
The main scale structure of the micrometer of the present invention is not limited to that shown in fig. 1, and includes other main scale structures. Wherein, as long as the measuring surface 3 of measuring claw 6 is the oblique cylinder face or sphere, it is the protection scope of the utility model.
The utility model discloses the principle that the micrometer measured the taper hole bore is: the basic principle of an internal micrometer is utilized, and the structure of the measuring claw is changed to be adaptive to the measuring taper; the inner micrometer is a measuring tool for measuring the inner size of the conical orifice end by utilizing the principle of a screw pair and reading the separation distance between the fixed measuring claw and the movable measuring claw.
Use the utility model discloses during the micrometer, loosen locking screw 8 earlier, will control two measuring claws 6 and stretch into the taper hole of measurand work piece 1 after that, rotatory micro-section of thick bamboo 11 makes about two measuring claws 6 measure face 3 and measured face 2 of measurand work piece 1 and be close to, then rotatory measuring force device 12 makes it send the sound, screws locking screw 8 at last and takes out the micrometer and read out the scale. Because the inner hole of the workpiece 1 to be measured is a taper hole, the measuring surface 3 of the measuring claw 6 is an inclined surface or a spherical surface, and the accurate measurement of the taper hole of the workpiece 1 to be measured can be ensured.
According to measuring claw 6, the utility model discloses the micrometer has two patterns: one of the patterns is a slanted cylindrical surface, as shown in fig. 2, 3, 4, 5, 6, 7 and 8; the other type is spherical, as shown in fig. 9, 10, 11 and 12.
Example 2
Because the inner hole of the workpiece 1 to be measured is an inner taper hole, the measuring claw 6 with the measuring surface being an inclined cylindrical surface can be completely attached to the taper hole of the workpiece.
When the measuring surfaces 3 (i.e., the contact surfaces with the workpiece 1) of the left and right measuring jaws 6 are inclined cylindrical surfaces, the measuring jaws 6 may have the following three configurations, but are not limited to the following three configurations:
the structure I and the convex column head are shown in figures 2, 3 and 4: the measuring claw 6 is divided into an upper part and a lower part, the lower part is a base body I610, the upper part is a measuring rod 611, the upper part of the base body I610 is a front opening platform 5, the measuring rod 611 is an oblique cylinder, the axial line of the oblique cylinder passes through the axial line of the base body I610, the included angle between the axial line of the oblique cylinder and the axial line of the base body I610 is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the taper hole of the workpiece; the measuring rod 611 is integral with the substrate i 610.
When the taper hole is measured, the spigot platform 5 on the base body I610 abuts against the outer end face 4 of the taper hole of the workpiece 1, the inclined cylinder of the measuring rod 611 is attached to the taper hole, and the reading displayed by the micrometer is the diameter of the taper hole of the workpiece 1. The advantages of the convex column head are: the measuring rod 611 and the base body I610 are integrated, and measurement is accurate.
The structure II and the stud heads are shown in figures 5 and 6: the measuring claw 6 is divided into a big part and a small part, the big part is a base body II 620,The small block is a measuring body 621, the upper part of the base body II 620 is a spigot platform 5 and is provided with an inclined cylindrical hole, the measuring body 621 is an inclined cylinder and is embedded in the inclined cylindrical hole of the base body II 620, the axial line of the inclined cylinder passes through the axial line of the base body II 620, and the included angle between the axial line of the inclined cylinder and the axial line of the base body II 620 is alpha, alpha is 90 degrees + theta/2, theta is 2tan-1(C/2), wherein C is the taper of the taper hole of the workpiece; the measuring body 621 and the base body II 620 are separated.
When the taper hole is measured, the spigot platform 5 on the measuring body 621 abuts against the outer end face 4 of the taper hole of the workpiece 1, the inclined cylinder of the spigot platform abuts against the taper hole, and the reading displayed by the micrometer is the diameter of the taper hole of the workpiece 1. The stud head has the advantages that: the measuring body 621 and the base body II 620 are split, and after the measuring body 621 is worn for a period of time, the measuring body can be replaced, so that the whole service life of the measuring claw 6 is prolonged, and the measuring precision is guaranteed.
The structure III and the cylindrical head are shown in figures 7 and 8: the measuring claw 6 is divided into a left part and a right part, the right part is a base body III 630, the rightmost end of the measuring claw is a straight surface, the upper part of the left end of the measuring claw is a section of inclined cylinder, and the left part is a front platform 5 which is connected below the inclined cylinder; the oblique cylinders are symmetrical front and back relative to the axis of the base III 630; the included angle between the outermost right external line of the oblique cylinder and the axial line of the base body III 630 is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the workpiece taper hole; the spigot platform 5 is integral with the base III 630.
When the taper hole is measured, the spigot platform 5 on the measuring claw 6 is abutted against the outer end face 4 of the taper hole of the workpiece 1, the inclined cylinder of the spigot platform is attached to the taper hole, and the reading displayed by the micrometer is the diameter of the taper hole of the workpiece 1. The cylindrical head has the advantages that: the inclined cylinder and the spigot platform 5 are integrated with the base body III 630, the measuring claw 6 is high in strength, and the measurement is accurate.
The utility model discloses in above-mentioned three kinds of structures: the outside measurement angle α of the oblique cylinder, i.e., the measurement column, is 90 ° + θ/2: wherein alpha is measured in the plane where the axis of the measuring column and the axis of the fixed sleeve 10 are located, namely the included angle between the outer side prime line and the axis of the fixed sleeve 10 at the outer side of measurement; θ is the taper angle of the taper hole, and if the taper of the taper hole is C, θ is 2tan-1(C/2), wherein the taper angle CIs 1: 5 or 1: 10 or 1: 15 or 1:30, of a nitrogen-containing gas; the axial lead of the base body where the measuring claw 6 is positioned is coaxial with the axial lead of the fixed sleeve 10; the spigot platforms 5 of the left and right measuring claws 6 are on the same plane and are parallel to the axis of the fixed sleeve 10.
As can be seen from the above structure, the utility model discloses micrometer is with the difference of current ordinary interior micrometer: one, the utility model discloses the outside measurement angle alpha of measuring the post is 90 ═ 90 + theta/2, can measure the taper hole: the measuring angle alpha of the measuring column in the common internal measuring micrometer is 90 degrees, and the measuring column cannot measure the taper hole; second, the utility model discloses micrometer's measurement claw 6 must have measurement tang platform 5, and two measurement claw tang platforms 5 are on the coplanar and parallel with measuring a section of thick bamboo axis. Therefore, the utility model discloses can measure the size of taper hole accurately.
The method for measuring the taper hole by the oblique cylindrical surface type measuring claw 6 of the utility model is shown in figure 1: a spigot platform 5 on a measuring claw 6 abuts against an outer end face 4 of a taper hole of a workpiece 1, an inclined cylinder, namely an outer side plain line 3 of a measuring column, is attached to an inner wall 2 of the taper hole, a plane determined by an axial line of the measuring column and an axial line of a fixed sleeve 10 passes through the axial line of the workpiece 1, and the measured maximum value is the diameter of the orifice of the taper hole. Assuming that the measurement range of the micrometer in fig. 1 is 225 and 250mm, after calibration by the standard calibration gauge, the graphical reading is 225mm, which indicates that the diameter at the aperture of the taper hole is 225 mm.
When the utility model discloses when measuring claw 6 of micrometer was the face of cylinder type to one side, each all need correspond a calibration ring gage to the micrometer, this moment, the utility model discloses the specification of micrometer still contains the tapering except measuring the size scope, is 225 ~ 250, 1 if the specification: 10; or 225-250, 1:30, etc. The utility model discloses micrometer's diameter scope and indicating value error are with ordinary interior micrometer, general every 25mm grade specification, and the diameter can reach 400mm or above, estimates to read and reaches 0.001mm to 0.002 mm.
Example 3
Because the inner hole of the workpiece 1 to be measured is a taper hole, the measuring claw 6 with the spherical measuring surface can be contacted with the taper hole of the workpiece 1 without being influenced by the processing angle of the taper hole of the workpiece and the like. When the taper hole is measured, the spigot platform 5 on the measuring claw 6 is abutted against the outer end face 4 of the taper hole, and the measuring ball body is contacted with the taper hole.
When the measuring surfaces 3 (i.e., the contact surfaces with the workpiece 1) of the left and right measuring claws 6 are spherical surfaces, the measuring claws 6 may have the following two structures, but are not limited to the following two structures:
as shown in fig. 9 and 10, the first structure is that the measuring claw 6 is divided into an upper part and a lower part, the lower part is a base iv 640, the upper part is a measuring sphere 641, the upper part of the base iv 640 is a spigot platform 5, the main body of the measuring sphere 641 is a spherical Sd, the upper surface, the lower surface and the inner side of the measuring sphere 641 are both truncated, the measuring sphere 641 is fixed on the spigot platform 5 through a screw 642, the included angle between the inner side of the axis line of the screw 642 and the vertical line is β, and β is about 5 ° to 25 °; the spigot platforms 5 of the left and right measuring claws 6 are on the same plane and are parallel to the axis of the fixed sleeve 10.
The spherical surface measuring claw 6 has the advantages that: the measuring range of the measuring sphere 641 is large, one measuring claw can measure the workpiece 1 with the inner hole taper changing within a certain range, namely, a plurality of workpieces with different tapers can be measured by only one micrometer, so that the measuring preparation time is short, the number of corresponding spare parts of the measuring claw is small, and the cost is saved.
In a second configuration, as shown in fig. 11 and 12, the measuring jaw 6 further includes an adjusting pad 643, and the adjusting pad 643 is disposed between the inner side surface of the measuring sphere 641 and the base iv 640.
The measuring jaw with the adjusting pad 643 has the advantages that: when the measuring sphere 641 is worn after a period of time, since the measuring sphere 641 is relatively difficult to machine, the adjusting pad 643 with different thickness can be replaced to ensure the contact between the measuring sphere 641 and the taper hole of the workpiece and perform the measurement, thereby prolonging the service life of the measuring claw 6.
The method for measuring the taper hole by using the spherical measuring claw 6 of the utility model is shown in figure 1: when the taper hole is measured, the spigot platform 5 on the measuring claw 6 slides closely to the outer end surface 4 of the taper hole of the workpiece 1, two sides of the spherical surface Sd of the measuring ball 641 are attached to the taper hole prime line 21, the diameter of the taper hole is obtained by reading the reading K displayed by the micrometer and adding a specific value delta, namely the diameter of the taper hole is D (K + delta), delta (D) (tan (45 degrees + theta/4) -1)]- (d-2h)·tan(θ/2)，θ＝2tan-1(C/2), (C is the cone of the taper hole)Degree); where Δ is a fixed value that can be calculated in advance, and is related to the actual taper of the workpiece and the structure of the measuring head.
Assuming that the diameter D of the orifice of the workpiece 1 is 225mm, the actual taper C measured in the early stage of the workpiece is 1: 30-1/30, the diameter D of the measuring head of the taper hole caliber micrometer is 8mm, the center height h is 2mm, and the values of C, D and h are respectively substituted into the formula (2), so that Δ is 0.0677 mm. And substituting the formula (1) to obtain D which is K +0.0677(mm), namely adding 0.0677mm to the reading K of the ruler to obtain the actual value of the aperture of the taper hole. From (2), it can be seen that Δ is a fixed value that can be calculated in advance, and is related to the actual taper of the workpiece and the structure of the measuring head. The micrometer with the spherical measuring claw can measure workpieces with a plurality of taper holes with different tapers, so that the detection efficiency is high.
From the foregoing, the utility model discloses micrometer quality is light, easy operation, measuring range is wide, measurement accuracy is high, is particularly suitable for the online initiative measurement of single small batch, high accuracy, jumbo size taper hole, has improved the machining efficiency and the qualification rate of product greatly. In addition, use the utility model discloses a micrometer detection efficiency is high, the cost is lower.
Claims (7)
1. A micrometer for measuring the caliber of a taper hole is characterized in that: the device comprises a left measuring claw and a right measuring claw (6), a handle (7), a locking screw (8), a fixed sleeve (10), a micro-cylinder (11), a force measuring device (12) and a micro-measuring screw (13); the left measuring claw (6) is a fixed measuring claw, the right measuring claw (6) is a movable measuring claw, and the contact surfaces of the left measuring claw and the right measuring claw (6) with the taper hole of the workpiece (1) to be measured, namely the measuring surface (3), are oblique cylindrical surfaces or spherical surfaces.
2. The micrometer of claim 1, wherein: when the contact surfaces of the left measuring claw (6) and the right measuring claw (6) and the measuring workpiece are inclined cylindrical surfaces, the measuring claw (6) is divided into an upper part and a lower part, the lower part is a base body I (610), the upper part is a measuring rod (611), the upper part of the base body I (610) is a spigot platform (5), the measuring rod (611) is an inclined cylinder, the axial line of the inclined cylinder passes through the axial line of the base body I (610), the included angle between the axial line of the inclined cylinder and the axial line of the base body I (610) is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2) C is the taper of the taper hole of the measured workpiece; the measuring rod (611) is integral with the substrate I (610).
3. The micrometer of claim 1, wherein: when the contact surfaces of the left measuring claw (6) and the right measuring claw (6) and the measuring workpiece are inclined cylindrical surfaces, the measuring claw (6) is divided into two large and small measuring claws, the large measuring claw is a base body II (620), the small measuring claw is a measuring body (621), the upper part of the base body II (620) is a spigot platform (5) and is provided with an inclined cylindrical hole, the measuring body (621) is an inclined cylinder and is embedded in the inclined cylindrical hole of the base body II (620), the axial lead of the inclined cylinder passes through the axial lead of the base body II (620), the included angle between the axial lead of the inclined cylinder and the axial lead of the base body II (620) is alpha, alpha is 90 + theta/2, and theta is 2tan DEG-1(C/2), wherein C is the taper of the taper hole of the workpiece; the measuring body (621) and the base body II (620) are separated.
4. The micrometer of claim 1, wherein: when the contact surfaces of the left and right measuring claws (6) and the measuring workpiece are inclined cylindrical surfaces, the measuring claws (6) are divided into a left part and a right part, the right part is a base body III (630), the rightmost end of the base body III is a straight surface, the upper part of the left end of the base body III is a section of inclined cylinder, and the left part is a stop platform (5) which is connected below the inclined cylinder; the oblique cylinders are symmetrical front and back relative to the axis of the base III (630); the included angle between the outermost right external line of the oblique cylinder and the axial line of the base body III (630) is alpha, alpha is 90 degrees + theta/2, and theta is 2tan-1(C/2), wherein C is the taper of the workpiece taper hole; the spigot platform (5) and the base body III (630) are integrated.
5. A micrometer according to any one of claims 2, 3 and 4, wherein: the outside measurement angle α of the oblique cylinder, i.e., the measurement column, is 90 ° + θ/2: wherein alpha is measured in the plane where the axis of the measuring column and the axis of the fixed sleeve (10) are located, namely the included angle between the outer side prime line and the axis of the fixed sleeve (10) at the outer side of measurement; theta is the taper angle of the taper hole, and theta is 2tan-1(C/2); c is that the taper of the taper hole is 1: 5 or 1: 10 or 1: 15 or 1:30, of a nitrogen-containing gas; the spigot platforms (5) on the left and right measuring claws (6) are on the same plane and are parallel to the axis of the fixed sleeve (10).
6. The micrometer of claim 1, wherein: when the contact surfaces of the left and right measuring claws (6) are spherical surfaces, the measuring claws (6) are divided into an upper part and a lower part, the lower part is a base body IV (640), the upper part is a measuring sphere (641), the upper part of the base body IV (640) is a spigot platform (5), the main body of the measuring sphere (641) is a spherical Sd, the upper surface, the lower surface and the inner side of the measuring sphere are flattened, the measuring sphere (641) is fixed on the spigot platform (5) through a screw (642), the included angle between the inner side of the axial lead of the screw (642) and a vertical line is beta, and the beta is about 5-25 degrees; the spigot platforms (5) on the left and right measuring claws (6) are on the same plane and are parallel to the axis of the fixed sleeve (10).
7. The micrometer of claim 6, wherein: the measuring jaw (6) further comprises an adjusting pad (643), wherein the adjusting pad (643) is arranged between the inner side face of the measuring sphere (641) and the base body IV (640).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120579242.6U CN214792838U (en) | 2021-03-22 | 2021-03-22 | Micrometer for measuring caliber of taper hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120579242.6U CN214792838U (en) | 2021-03-22 | 2021-03-22 | Micrometer for measuring caliber of taper hole |
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| CN214792838U true CN214792838U (en) | 2021-11-19 |
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| CN202120579242.6U Active CN214792838U (en) | 2021-03-22 | 2021-03-22 | Micrometer for measuring caliber of taper hole |
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