CN112648912A - Checking fixture capable of detecting concentricity requirements of two ends of columnar valve cover - Google Patents
Checking fixture capable of detecting concentricity requirements of two ends of columnar valve cover Download PDFInfo
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- CN112648912A CN112648912A CN202011597009.7A CN202011597009A CN112648912A CN 112648912 A CN112648912 A CN 112648912A CN 202011597009 A CN202011597009 A CN 202011597009A CN 112648912 A CN112648912 A CN 112648912A
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- valve cover
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- inspection device
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- 238000007689 inspection Methods 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 235000013290 Sagittaria latifolia Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000015246 common arrowhead Nutrition 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a checking fixture capable of detecting concentricity requirements of two ends of a columnar valve cover, which comprises: a concentric rod; the positioning core is internally provided with a through hole with the same outer diameter as the concentric rod, and the outside of the positioning core is provided with a plurality of threaded parts with different outer diameters. The checking fixture is beneficial to improving the detection frequency, can detect the concentricity of two ends by 100 percent, reduces the outflow of unqualified products and greatly improves the warehousing qualification rate; the positioning cores in the check tool can be concentrically connected in threaded holes with different apertures, so that the same check tool can detect valve covers with different models, and the applicability is wide; in addition, in the detection process, the specific eccentricity condition of the unqualified product can be directly observed, which is beneficial to the analysis of inferior-quality products and the later process transformation.
Description
Technical Field
The invention relates to the technical field of inspection tools for machining, in particular to a tool capable of detecting concentricity requirements of two ends of a columnar valve cover.
Background
As shown in figure 1, the product structure of the columnar valve cover is shown, threaded holes are formed in the two ends of the valve cover, and the requirement on the concentricity of the threaded holes in the two ends of the valve cover is high during production and machining for normal installation and use in the later stage of the valve cover. However, the diameters of the threaded holes at the two ends of the same valve cover are not equal, and the diameters of the threaded holes between valve covers of different models are also not equal, so that the conventional checking fixture is difficult to quickly detect the concentricity of the two ends of a columnar valve cover product. At present, a three-coordinate detection mode is mainly adopted, but the detection frequency is low, and 100% detection of products cannot be realized.
Disclosure of Invention
The invention aims to provide a checking fixture capable of detecting concentricity requirements of two ends of a columnar valve cover, and solves the problem of low detection frequency of the existing detection mode of concentricity of the two ends of the columnar valve cover.
The invention realizes the purpose through the following technical scheme:
a check tool capable of detecting concentricity requirements of two ends of columnar valve cover comprises
A concentric rod;
the positioning core is internally provided with a through hole with the same outer diameter as the concentric rod, and the outside of the positioning core is provided with a plurality of threaded parts with different outer diameters.
The improved structure of the mobile phone is characterized in that the positioning core comprises a main rod and a loop bar fixedly connected to the outer portion of the main rod, a through hole is formed in the inner portion of the main rod, the loop bar is composed of a plurality of threaded pipes, the threaded pipes are sequentially movably sleeved from inside to outside, adjacent threaded pipes can move axially relatively, and a threaded portion is formed in the outer wall of each threaded pipe.
The improved structure is characterized in that one end part of the threaded pipe is provided with a connecting block extending towards the inner side, the connecting block is connected with a spring, the spring is connected with the end part of an adjacent threaded pipe at the inner side, the outer wall of the threaded pipe is provided with a plurality of grooves along the axial direction, the inner wall of the threaded pipe is provided with a plurality of convex edges, and the adjacent threaded pipes are connected in a movable fit mode through the grooves and the convex edges.
The further improvement lies in that when the spring is in the original length, the adjacent threaded pipes are distributed in a stepped staggered mode.
The further improvement is that the thickness of the pipe wall of the threaded pipe is 1-2 mm.
The concentric rod is characterized by comprising a central shaft, a needle sleeve and a plurality of long needles, wherein the needle sleeve is connected to the outside of the central shaft, honeycomb-shaped through holes are formed in the needle sleeve along the axial direction of the needle sleeve, the long needles are movably inserted into the through holes in a one-to-one correspondence mode, and after the long needles are inserted, all the long needles form a rod body with the same diameter as the through holes in the positioning core.
The improved structure is characterized in that a handle is connected to the end part of the central shaft.
The further improvement is that the needle sleeve is made of metal alloy materials, and the wall thickness of the outer wall of the needle sleeve and the wall thickness of the inner perforated wall are 0.1-0.3 mm.
The improvement is that the end of the needle sleeve is provided with a baffle plate extending radially outwards.
The invention has the beneficial effects that:
(1) the checking fixture is beneficial to improving the detection frequency, can detect the concentricity of two ends by 100 percent, reduces the outflow of unqualified products and greatly improves the warehousing qualification rate;
(2) the positioning cores in the check tool can be concentrically connected in threaded holes with different apertures, so that the same check tool can detect valve covers with different models, and the applicability is wide; in addition, in the detection process, the specific eccentricity condition of the unqualified product can be directly observed, which is beneficial to the analysis of inferior-quality products and the later process transformation.
Drawings
FIG. 1 is a schematic structural view of a cylindrical valve cover;
FIG. 2 is a schematic structural view of a gauge of the present invention;
FIG. 3 is a schematic axial cross-sectional view of the positioning core with all springs in their original lengths;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a front view of a threaded pipe;
FIG. 6 is an end view of a threaded pipe;
FIG. 7 is a schematic axial cross-sectional view of the positioning core after displacement of one of the threaded pipes;
FIG. 8 is a schematic view of the structure of a needle hub in a concentric rod;
FIG. 9 is a schematic view of the connection of the present invention during testing;
in the figure: 1. a concentric rod; 11. a central shaft; 12. a needle sleeve; 121. perforating; 122. a baffle plate; 13. a long needle; 14. a handle; 2. a positioning core; 21. a through hole; 22. a threaded portion; 23. a main rod; 24. a loop bar; 241. a threaded pipe; 242. connecting blocks; 243. a spring; 244. a trench; 245. and (7) a rib.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Referring to fig. 2 to 8, a checking fixture capable of detecting concentricity requirements of two ends of a cylindrical valve cover comprises:
a concentric rod 1;
two location cores 2, the location core 2 is inside to be opened has the through-hole 21 that equals with concentric stick 1 external diameter, and location core 2 outside is formed with the screw thread portion 22 of a plurality of different external diameters.
In the invention, the thread part 22 outside the positioning core 2 is used for being in threaded connection with a threaded hole at the end part of the columnar valve cover, the through hole 21 is concentric with the threaded hole after connection, two positioning cores 2 are connected at the two ends of the columnar valve cover, the concentric rod 1 is inserted from the through hole 21 in one positioning core 2, if the concentric rod 1 can be smoothly inserted into the through hole 21 of the other positioning core 2, the two ends of the valve cover are concentric, and the product is qualified; otherwise, the two ends of the valve cover do not meet the concentricity requirement, so that detection and judgment are realized.
Specifically, the positioning core 2 of the present invention includes a main rod 23 and a sleeve rod 24 fixedly connected to the outside of the main rod 23, a through hole 21 is formed in the main rod 23, the sleeve rod 24 is preferably connected to a side wall of one end of the main rod 23, so that one section of the other end of the main rod 23 leaks out, so as to facilitate use, the sleeve rod 24 is composed of a plurality of threaded pipes 241, the plurality of threaded pipes 241 are movably sleeved from inside to outside in sequence, adjacent threaded pipes 241 can move axially relative to each other and cannot rotate relative to each other, and a threaded portion 22 is formed on the outer wall of each threaded pipe 241, so that all the threaded pipes 241 are added up to provide a threaded portion 22 with a uniformly gradually changing outer diameter for connection.
In order to realize the movable coupling between the screw pipes 241, one end of each screw pipe 241 (except for the innermost screw pipe 241, which is directly welded with the main rod 23) is provided with a connecting block 242 extending inwards, the connecting block 242 is annular, the connecting block 242 is connected with a spring 243, the other end of the spring 243 is connected with the end of the adjacent screw pipe 241 at the inner side, the outer wall of the screw pipe 241 is provided with a plurality of grooves 244 along the axial direction, generally 4-6 grooves are formed, the grooves 244 do not influence the normal function of the screw part 22, the inner wall of the screw pipe 241 is provided with convex ribs 245 with the same number as the grooves 244, and the adjacent screw pipes 241 are movably matched and connected with the convex ribs 245 through the grooves 244. Meanwhile, after connection, adjacent threaded pipes 241 cannot rotate relatively, so that integral rotation can be realized.
Preferably, when the spring 243 is in the original length, the adjacent threaded pipes 241 are distributed in a stepped staggered manner, that is, the inner threaded pipe 241 partially extends out, so that the whole positioning core 2 is in an arrow-head structure, which facilitates the insertion of the positioning core 2 into the threaded hole of the valve cover, and simultaneously facilitates the positioning core 2 to be located at the center of the threaded hole. When one of the tubes 241 is slid toward the end of the connecting block 242 with respect to the inside tube 241, the rib 245 slides in the groove 244 and the spring 243 is elongated such that the threaded portion 22 of the inside tube 241 is substantially exposed. In addition, the spring 243 also plays a fixing role, and ensures that the threaded pipe 241 does not slide when not pushed by external force or pushed by small external force.
Preferably, the wall thickness of the threaded pipe 241 is equal and is 1-2mm, so that the size of the threaded part 22 provided by the positioning core 2 is more subdivided, and one of the threaded parts 22 can be selected to be in threaded connection with the threaded holes at the two ends of the valve cover.
In addition, the concentric rod 1 comprises a central shaft 11, a needle sleeve 12 and a plurality of long needles 13, the needle sleeve 12 is connected to the outside of the central shaft 11, the needle sleeve 12 is made of foil, the outside of the needle sleeve is cylindrical, honeycomb-shaped through holes 121 are formed in the inside of the needle sleeve along the axial direction of the needle sleeve, the long needles 13 are movably inserted into the through holes 121 in a one-to-one correspondence mode, the cross-sectional shapes of the long needles 13 and the through holes 121 are consistent, after insertion, certain friction force is formed between the long needles and the through holes, free sliding and falling off of the long needles are avoided, after insertion, all the long needles 13 form a cylindrical rod body with the same diameter as that of the through holes 21 in the positioning core 2.
Preferably, the end of the central shaft 11 is connected with a handle 14, so as to facilitate the connection operation of the concentric rod 1, and the surface of the handle 14 is provided with grains to increase the friction force.
Preferably, the needle sheath 12 is made of metal alloy material, such as high-strength and high-pressure-resistant magnesium alloy, and the wall thickness of the outer wall of the needle sheath 12 and the inner perforated wall is 0.1-0.3mm, which is not too thick, so that the gap between the long needles 13 is as small as possible, and is more close to the structure of a solid cylindrical rod.
Preferably, the end of the needle sheath 12 is provided with a baffle 122 extending radially outwards, when the concentric rod 1 is inserted into the through hole 21 of the positioning core 2, the baffle 122 can play a role in blocking, avoiding excessive insertion, and also playing a role in determining the insertion depth, for example, during detection, the baffle 122 is aligned with the end of the through hole 21.
Referring to fig. 9 again, the concentricity testing process includes two steps:
(1) firstly, two positioning cores 2 are connected to two ends of a valve cover, and the specific process is as follows: hold mobile jib 23, push loop bar 24 towards valve gap tip screw hole, in the loop bar 24 pushes the in-process, because the screwed pipe 241 external diameter that leans on the inboard is less, consequently can push the screwed hole one by one, when meetting the screwed pipe 241 that the external diameter is close to the screw hole internal diameter, less thrust can't make it continue to push, then rotate mobile jib 23 this moment, make the screw thread portion 22 and the screw hole threaded connection of this screwed pipe 241 outer wall, in the connection process, the screwed pipe 241 that is located this screwed pipe 241 outside then withdraws from behind the blockking of screw hole terminal surface, make the screw thread portion 22 of effect of connecting expose and fully be connected with the screw hole, accomplish the connection of one end location core 2 this moment promptly. Then, another positioning core 2 is connected to the other end of the valve cover in the same manner.
(2) Inserting the concentric rod 1 into the through hole 21 of the positioning core 2 at any end, wherein in the inserting process, when the front end of a cylindrical rod body consisting of all the long needles 13 is abutted into the through hole 21 of the positioning core 2 at the other end, if the two ends of the valve cover are completely concentric, all the long needles 13 can be completely inserted into the through hole 21 of the positioning core 2 at the other end, the end parts of all the long needles 13 at the outer end can be observed to be flush, if the concentricity of the two ends of the valve cover cannot meet the requirement, part of the long needles 13 can be withdrawn due to the blockage of the end surface of the through hole 21, the end parts of the long needles 13 at the outer end can be observed to be not be flush; further, the specific eccentric position and the eccentric degree can be known according to the position and the number of the protruding long pins 13, for example, if the top long pin 13 is protruded as shown in fig. 9, the eccentric position of the right-end threaded hole in the drawing is illustrated as being located at the lower part, and the defective product analysis and the later process improvement can be facilitated after the specific situation is known.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides an examine utensil that required of detectable column valve gap both ends concentricity which characterized in that: comprises that
A concentric rod (1);
the positioning device comprises two positioning cores (2), wherein through holes (21) with the same outer diameters as the concentric rods (1) are formed in the positioning cores (2), and a plurality of threaded parts (22) with different outer diameters are formed outside the positioning cores (2).
2. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover according to claim 1, wherein: the location core (2) include mobile jib (23) and fixed connection at the outside loop bar (24) of mobile jib (23), through-hole (21) are seted up to the inside of mobile jib (23), loop bar (24) comprise a plurality of screwed pipes (241), a plurality of screwed pipes (241) are cup jointed by interior activity to outer in proper order, but adjacent screwed pipe (241) axial displacement relatively, and establish screw thread portion (22) at the outer wall of every screwed pipe (241).
3. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 2, wherein: one end of the threaded pipe (241) is provided with a connecting block (242) extending towards the inner side, the connecting block (242) is connected with a spring (243), the spring (243) is connected with the end of the adjacent threaded pipe (241) at the inner side, the outer wall of the threaded pipe (241) is provided with a plurality of grooves (244) along the axial direction, the inner wall of the threaded pipe (241) is provided with a plurality of convex ribs (245), and the adjacent threaded pipes (241) are movably matched and connected with the convex ribs (245) through the grooves (244).
4. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 3, wherein: when the spring (243) is in the original length, the adjacent threaded pipes (241) are distributed in a stepped staggered mode.
5. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 3, wherein: the wall thickness of the threaded pipe (241) is 1-2 mm.
6. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover according to claim 1, wherein: the concentric rod (1) comprises a central shaft (11), a needle sleeve (12) and a plurality of long needles (13), the needle sleeve (12) is connected to the outside of the central shaft (11), honeycomb-shaped through holes (121) are formed in the inner portion of the needle sleeve (12) along the axial direction of the needle sleeve, the long needles (13) are movably inserted into the through holes (121) in a one-to-one correspondence mode, and all the long needles (13) after being inserted form a rod body with the same diameter as the inner through holes (21) of the positioning core (2).
7. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 6, wherein: the end part of the central shaft (11) is connected with a handle (14).
8. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 6, wherein: the needle sleeve (12) is made of metal alloy materials, and the wall thickness of the outer wall of the needle sleeve (12) and the wall thickness of the inner through hole wall are 0.1-0.3 mm.
9. The inspection device capable of detecting the concentricity requirement of two ends of a cylindrical valve cover as claimed in claim 6, wherein: the end of the needle sleeve (12) is provided with a baffle plate (122) extending outwards in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597009.7A CN112648912B (en) | 2020-12-29 | 2020-12-29 | Gauge capable of detecting concentricity requirements of two ends of columnar valve cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597009.7A CN112648912B (en) | 2020-12-29 | 2020-12-29 | Gauge capable of detecting concentricity requirements of two ends of columnar valve cover |
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| Publication Number | Publication Date |
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| CN112648912A true CN112648912A (en) | 2021-04-13 |
| CN112648912B CN112648912B (en) | 2024-02-09 |
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| CN202011597009.7A Active CN112648912B (en) | 2020-12-29 | 2020-12-29 | Gauge capable of detecting concentricity requirements of two ends of columnar valve cover |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112648912B (en) | 2024-02-09 |
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