CN111156878A - Arc groove depth qualification measuring tool - Google Patents
Arc groove depth qualification measuring tool Download PDFInfo
- Publication number
- CN111156878A CN111156878A CN202010128977.7A CN202010128977A CN111156878A CN 111156878 A CN111156878 A CN 111156878A CN 202010128977 A CN202010128977 A CN 202010128977A CN 111156878 A CN111156878 A CN 111156878A
- Authority
- CN
- China
- Prior art keywords
- measuring
- arc
- rod
- measuring body
- limiting groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a device for measuring the depth qualification of an arc groove, which comprises a measuring rod and a measuring body, wherein the measuring rod and the measuring body are installed in a matching way, one end of the measuring rod is a measuring end, the radius of the measuring end is consistent with that of an arc limiting groove of a cam bracket, and the thickness of the measuring end is consistent with the width of the arc limiting groove of the cam bracket; one end of the measuring body is processed into a step shape, the other end of the measuring body is arc-shaped, the radius of the arc shape of the measuring body is consistent with that of the camshaft hole of the cam support, the measuring body is supported on the wall of the camshaft hole during measurement, and a measuring head at the end part of the measuring rod is in contact with the bottom of the arc limiting groove of the cam support. The method has the advantages of simple operation, high measurement efficiency, good measurement precision and reproducibility, and capability of inspecting the depth dimension of the arc limiting groove of the processed semi-finished product and finished product cam bracket; the use of a three-coordinate measuring instrument is reduced, and the inspection cost is saved; meanwhile, the requirement on the skill of an operator is reduced, and the applicability of the measuring tool is expanded.
Description
Technical Field
The invention relates to a cam bracket machining depth dimension qualification measuring instrument, in particular to an arc groove depth qualification measuring instrument.
Background
The camshaft of the motorcycle engine is used as a main component of a valve actuating mechanism, and the installation and the positioning of the camshaft on a cylinder head are very important. The cam bracket is used in combination with the cylinder head for mounting and axial and radial positioning of the camshaft. Generally, an arc limiting groove is arranged on a cam bracket to control axial movement and radial matching. The depth of the arc limiting groove relative to the camshaft hole is the key size for controlling the radial fit of the camshaft and the cam bracket, and whether the arc limiting groove is qualified or not is related to whether the camshaft can be installed in place or not and whether the radial run-out meets the requirements or not. Because the camshaft hole and the arc limiting groove are not formed in one step, and the arc limiting groove only has a half arc surface, the lowest point is difficult to find when a depth gauge or a caliper is used for measurement, the operation difficulty is high, the measurement error is large, and the precision is low. Generally, when the depth is measured, a coordinate system can be established only by using a three-coordinate measuring instrument, the circle center positions of the camshaft hole and the circular arc limiting groove are calculated in a simulation mode, and finally the depth dimension of the circular arc limiting groove is obtained.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an arc groove depth qualification measuring instrument which is simple to operate, high in measuring efficiency and good in measuring accuracy and reproducibility and is used for measuring an arc groove with the depth of 3.015(+ 0.140/0).
The technical scheme is as follows: the cam bracket comprises a measuring rod and a measuring body, wherein the measuring rod and the measuring body are installed in a matched mode, one end of the measuring rod is a measuring end, the radius of the measuring end is consistent with that of a cam bracket arc limiting groove, and the thickness of the measuring end is consistent with that of the cam bracket arc limiting groove; one end of the measuring body is processed into a step shape, the other end of the measuring body is arc-shaped, and the radius of the arc-shaped is consistent with that of the axle hole of the cam bracket.
The step-like height difference of one end of the measuring body is 0.140 (+ -0.005).
The outer diameter of the measuring rod is matched with the inner hole of the measuring body.
The measuring rod is connected with the measuring body through screws.
The side face of the measuring rod is provided with a rectangular groove for mounting a screw.
A countersunk hole is processed on the outer side of the measuring body and used for mounting a screw.
The measuring end of the measuring rod is processed into a sheet shape.
The measuring rod and the measuring body are both quenched.
The working principle is as follows: during measurement, the lower part of the measuring body is supported on the wall of the camshaft hole, the tongue-shaped measuring head of the measuring rod is contacted with the bottom of the arc limiting groove of the cam bracket, the measuring tool can be rotated by 90 degrees left and right, and the depth of the arc groove is qualified if the end part of the measuring rod is positioned between the end part steps (qualification judgment limit) of the measuring body.
Has the advantages that: the method has the advantages of simple operation, high measurement efficiency, good measurement precision and reproducibility, and capability of inspecting the depth dimension of the arc limiting groove of the processed semi-finished product and finished product cam bracket; the use of a three-coordinate measuring instrument is reduced, and the inspection cost is saved; meanwhile, the requirement on the skill of an operator is reduced, and the applicability of the measuring tool is expanded.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention in a measuring configuration;
fig. 3 is a side view of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to 3, the present invention includes a measuring rod 1, a screw 2, and a measuring body 3. During measuring stick 1 inserted the hole of measuring body 3, the side processing of measuring body 3 has the counter sink, and the side processing of measuring stick 1 has the rectangular channel, and the position of rectangular channel and counter sink corresponds, and during the combination, screw 2 passed the counter sink of measuring body 3, and the head stretches into the rectangular channel of measuring stick 1 to link together measuring body 3 and measuring stick 1. The measuring rod 1 was manufactured using T10A, ground at both ends, and subjected to a quenching process. One end of the measuring rod 1 is a measuring end which is processed into a tongue-shaped measuring head in an arc shape and a slice shape, and the radius of the tongue-shaped measuring head is consistent with the radius 61 of the arc limiting groove of the cam bracket, as shown in fig. 2; the thickness of the tongue-shaped measuring head is consistent with the width 62 of the arc limiting groove of the cam bracket, as shown in fig. 3; the measuring rod 1 has a cylindrical end part, the outer diameter of which matches the inner diameter of the measuring body 3, as shown in fig. 2.
Screw 2 is a standard fastener for a half-countersunk head screw in accordance with GB/T74. The measuring body 3 is made of T10A, two ends of the measuring body are ground and quenched, the inner diameter of the measuring body is matched with the outer diameter of the measuring rod 1, and a countersunk hole matched with a countersunk screw is machined on the outer side of the measuring body. One end of the measuring body 3 is machined into an arc shape, the radius of the arc shape is consistent with the bore diameter of the axle hole of the cam bracket, the other end of the measuring body is ground into a step with the left-right height difference of 0.140 (+ -0.005), namely, the height difference between the qualified upper limit 51 and the qualified lower limit 52 is 0.140 (+ -0.005), and the value of the height difference is consistent with the depth tolerance 3.015(+0.140/0) of the arc groove, as shown in fig. 2.
When the measuring rod is combined, the screw 2 penetrates through a countersunk hole of the measuring body 3, and the head of the screw extends into the rectangular groove of the measuring rod 1; the tail part of the measuring rod 1 is kept flush with the qualified upper limit 51, the height difference between a tongue-shaped measuring head of the measuring rod 1 and the arc-shaped end part of the measuring body 3 is controlled by adopting a processing mode of grinding or lapping the tail part of the measuring rod 1, namely the depth control limit 4 shown in figure 1 is between 3.015(0/-0.005), and the value of the depth control limit 4 is kept consistent with the nominal depth dimension value of the arc groove.
During measurement, the lower part of the measuring body 3 is supported on the wall of the camshaft hole, and the tongue-shaped measuring head of the measuring rod 1 is contacted with the bottom of the arc limiting groove of the cam bracket, as shown in fig. 2. When the depth of the arc groove is the minimum value of 3.015, the end part of the measuring rod 1 is flush with the qualified upper limit 51; when the depth of the circular arc groove is 3.155 at the maximum, the end of the measuring rod 1 is flush with the lower acceptable limit 52. The measuring body 3 and the measuring rod 1 can rotate along the arc groove at each 90 degrees, and at the moment, the end part of the measuring rod 1 is positioned at the end step of the measuring body 3: namely, between the qualification determination limits 5 shown in fig. 1, namely, the depth of the circular arc groove is qualified.
Claims (8)
1. The instrument for measuring the depth qualification of the arc groove is characterized by comprising a measuring rod and a measuring body, wherein the measuring rod and the measuring body are installed in a matched mode, one end of the measuring rod is a measuring end, the radius of the measuring end is consistent with that of the arc limiting groove of the cam bracket, and the thickness of the measuring end is consistent with that of the arc limiting groove of the cam bracket; one end of the measuring body is processed into a step shape, the other end of the measuring body is arc-shaped, and the radius of the arc-shaped is consistent with that of the axle hole of the cam bracket.
2. The apparatus as claimed in claim 1, wherein the step-like height difference at one end of the measuring body is 0.140.
3. The apparatus of claim 1, wherein the measuring rod has an outer diameter that fits an inner hole of the measuring body.
4. The apparatus as claimed in claim 1 or 3, wherein the measuring rod is connected to the measuring body by screws.
5. The apparatus as claimed in claim 4, wherein the measuring rod is formed with a rectangular groove on its side surface.
6. The apparatus of claim 1, wherein a counter bore is formed at an outer side of the measuring body.
7. The apparatus as claimed in claim 1, wherein the measuring end of the measuring rod is processed into a thin plate.
8. The apparatus as claimed in claim 1, wherein the measuring rod and the measuring body are both quenched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128977.7A CN111156878A (en) | 2020-02-28 | 2020-02-28 | Arc groove depth qualification measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010128977.7A CN111156878A (en) | 2020-02-28 | 2020-02-28 | Arc groove depth qualification measuring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111156878A true CN111156878A (en) | 2020-05-15 |
Family
ID=70566664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010128977.7A Pending CN111156878A (en) | 2020-02-28 | 2020-02-28 | Arc groove depth qualification measuring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111156878A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028954A (en) * | 2021-02-25 | 2021-06-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Verticality detection device and detection method for pressure measuring bottom hole of wind tunnel pressure measuring test model |
-
2020
- 2020-02-28 CN CN202010128977.7A patent/CN111156878A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028954A (en) * | 2021-02-25 | 2021-06-25 | 中国空气动力研究与发展中心高速空气动力研究所 | Verticality detection device and detection method for pressure measuring bottom hole of wind tunnel pressure measuring test model |
| CN113028954B (en) * | 2021-02-25 | 2023-09-22 | 中国空气动力研究与发展中心高速空气动力研究所 | Perpendicularity detection device and detection method for pressure measurement bottom hole of wind tunnel pressure measurement test model |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10365081B2 (en) | Checking tool for measuring distance between adjacent sinking grooves in inner hole of mechanical part | |
| US11168972B2 (en) | Detection device | |
| US11204230B2 (en) | Adjustable vehicle wheel brake space inspection tool | |
| CN103322878B (en) | Special detection tool for conical surface runout of cylinder cover valve seat of diesel engine | |
| CN111156878A (en) | Arc groove depth qualification measuring tool | |
| CN110925044B (en) | Method for adjusting braking and valve clearance in engine cylinder and angle measuring tool | |
| CN114505673B (en) | Air compressor main machine exhaust end screw clearance adjustment process | |
| CN211291293U (en) | Arc groove depth qualification measuring tool | |
| CN112146553B (en) | Design method and use method of inner inclined hole position size measuring device | |
| CN109029211B (en) | Measuring instrument and measuring method for axial clearance of rotating shaft of transmission | |
| CN110977537A (en) | Clamp for processing arc straight groove of rectangular plate | |
| CN201697588U (en) | Detection tool for calibrating positioning of technique datum holes | |
| CN103144033B (en) | Grinding wheel centering device with detection function | |
| JPH07332908A (en) | Thickness measuring apparatus for thick part of lower surface of top wall of tappet | |
| CN112108843A (en) | Crankshaft machining process | |
| CN105252313A (en) | Machining process of generator shell | |
| CN210773837U (en) | Tool for quickly detecting depth of inner cavity of steel die forging piston | |
| CN106017373A (en) | Flywheel cover basin mouth and end face run-out detection device | |
| CN214223948U (en) | Tool for rapidly detecting form and position tolerance of shaft hole of butterfly plate of butterfly valve | |
| CN114367872B (en) | Dial gauge assembly and calibrating device and alignment/clamping tool based on same | |
| US6401348B1 (en) | Electrodynamic rotational axis acquisition tool | |
| CN108759631A (en) | Valve retainer detection suit and its valve retainer roundness of external circle error detecting apparatus | |
| CN108827105A (en) | A kind of engine body thrust gear width dimensions cubing | |
| CN219607902U (en) | Measuring device for measuring distance from center of two holes to plane | |
| CN103624680A (en) | Clamping device for generating grinding of minor hemisphere |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |