CN216694790U - Threaded hole perpendicularity detection device - Google Patents
Threaded hole perpendicularity detection device Download PDFInfo
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- CN216694790U CN216694790U CN202220203051.4U CN202220203051U CN216694790U CN 216694790 U CN216694790 U CN 216694790U CN 202220203051 U CN202220203051 U CN 202220203051U CN 216694790 U CN216694790 U CN 216694790U
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Abstract
The utility model provides a threaded hole perpendicularity detection device, which comprises a calibration rod and a sleeve; the correcting rod comprises a correcting rod body and a detection standard part arranged on the correcting rod body, wherein the detection standard part is of a screw rod structure matched with the detected threaded hole; the sleeve is sleeved on the rod calibration body, and a step structure is formed between the sleeve and the detection standard component; the detection standard component is vertically screwed into the detected threaded hole, and the verticality of the detected threaded hole is judged by judging the planeness of the step structure. The threaded hole perpendicularity detection device provided by the utility model has the characteristics of simple structure, fewer relatively movable parts and no damage to the surface of a workpiece in the measurement process.
Description
Technical Field
The utility model relates to the technical field of machining quality detection, in particular to a threaded hole perpendicularity detection device.
Background
A large-scale bearing ring is provided with a plurality of threaded holes for connecting other parts of a host, and the perpendicularity is an important quality characteristic of the threaded holes and represents the variation of the axis of the threaded holes in the vertical direction relative to the normal line of the end surface of the threaded holes. When the perpendicularity of the threaded hole exceeds the allowable tolerance range, the bolt interferes with the wall of the unthreaded hole of the connecting part, and the threaded hole cannot be mounted, so that the perpendicularity error of the threaded hole is generally required to be controlled within a certain range. Considering characteristics such as the screw hole is more in quantity on bearing batch production and every product, it is reasonable and more effective screw hole straightness measuring tool that hangs down in order to improve detection efficiency, assurance product quality to necessarily design a work.
At present, the detection method for the perpendicularity of the threaded hole is mostly used for measuring by utilizing the combination of simple measuring tools, for example, the threaded hole correcting rod is completely screwed into the threaded hole to be measured, then two square edges of a square are respectively abutted against the outer circular surface of the threaded hole correcting rod and the mounting surface of the threaded hole, finally, a clearance between the outer circular surface of the threaded hole correcting rod and the square edge is detected by using a feeler gauge, and the perpendicularity of the threaded hole is roughly estimated. The method for measuring and calculating the perpendicularity of the threaded hole is rough, can only qualitatively indicate whether the threaded hole is perpendicular to the end face, cannot accurately read out the specific numerical value of the perpendicularity, and does not consider the influence of the planeness on the perpendicularity measurement of the threaded hole.
In order to improve the measuring efficiency, people design a plurality of special threaded hole verticality measuring tools by utilizing a similar triangle principle, and the defects that a measuring head of a dial indicator is in rigid contact with a threaded hole mounting surface in the measuring process, and the measuring head can scratch the surface of a workpiece in the rotating process of the dial indicator around the axis of a threaded hole. In addition, the measuring head is often contacted with the mounting surface of the measured threaded hole of the workpiece, so that the measuring head is easily abraded, the detection precision is reduced, and the service life of the detection tool is shortened. And some measuring tools have more movable parts, the clearance in the kinematic pair may have great influence on the measurement precision, and the disassembly and the assembly are very inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a threaded hole perpendicularity detection device, which comprises a calibration rod and a sleeve; the correcting rod comprises a correcting rod body and a detection standard part arranged on the correcting rod body, wherein the detection standard part is of a screw rod structure matched with the detected threaded hole; the sleeve is sleeved on the rod calibration body, and a step structure is formed between the sleeve and the detection standard component; the detection standard component is vertically screwed into the detected threaded hole, and the verticality of the detected threaded hole is judged by judging the planeness of the step structure.
Optionally, the sleeve and the rod checking body are matched with each other by adopting an H-level tolerance.
Optionally, the detection standard component is further provided with scales in the length direction.
Optionally, the rod checking body is further provided with a handle for screwing the detection standard component into the detected threaded hole.
Optionally, a handle is fixedly mounted on the rod checking body.
Optionally, a through hole penetrating through the rod checking body is formed in the rod checking body, and a handle is detachably mounted in the through hole.
Optionally, the detection standard is provided with a plurality of pieces with different thread diameters, thread pitches and thread lengths.
The utility model also provides a method for detecting the perpendicularity of the detected threaded hole by adopting the threaded hole perpendicularity detection device, which comprises the following steps:
step one, preparation before detection: the sleeve and the calibration rod are mutually installed, and the lower end face of the sleeve is ensured to be aligned with the upper end face of the detection standard component;
step two, detection: vertically screwing the detection standard component into the detected threaded hole until the detection standard component cannot be screwed into the detected threaded hole; and judging the verticality of the detected threaded hole according to the sizes of gaps at different positions between the lower end surface of the sleeve and the upper end surface of the detected threaded hole.
Optionally, the following steps are adopted to judge the perpendicularity of the detected threaded hole:
s2.1, detecting the sizes of gaps at different positions between the lower end face of the sleeve and the upper end face of the threaded hole to be detected, and finding out a minimum gap L1 and a maximum gap L2 between the lower end face of the sleeve and the upper end face of the threaded hole to be detected;
s2.2, calculating the distance x between the central axis of the detected threaded hole and the vertical axis through the minimum clearance L1 and the maximum clearance L2 between the lower end surface of the sleeve and the upper end surface of the detected threaded hole1：
Wherein: Δ x ═ L2-L1, D1Expressed as the length of the thread of the tapped hole to be tested, D2Expressed as the outer diameter of the sleeve;
s2.3, judging the verticality of the detected threaded hole: when x is1If not, judging that the detected threaded hole is not in a vertical state.
Compared with the prior art, the utility model has the following beneficial effects:
the threaded hole perpendicularity detection device provided by the utility model has the characteristics of simple structure, fewer relatively movable parts and no damage to the surface of a workpiece in the measurement process by adopting a combined structure of the sleeve and the calibration rod and taking a plane formed by combining the sleeve and the calibration rod as a reference surface to detect the perpendicularity of the threaded hole.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic diagram of a threaded hole perpendicularity detection device in an embodiment of the utility model;
FIG. 2 is a schematic view of the structure of the school stick of FIG. 1;
FIG. 3 is a schematic diagram of the verticality detection state of the threaded hole in the embodiment of the utility model.
Wherein:
01. the device comprises a detected threaded hole, 1, a calibration rod, 1.1, a calibration rod body, 1.2, a detection standard component, 1.3, a handle, 1.4, a detection standard plane, 2, a sleeve, 2.1 and a lower end face.
Detailed Description
In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the several references in this disclosure are not limited to the particular numbers in the examples of the figures; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.
Example (b):
referring to fig. 1 and 2, the device for detecting the perpendicularity of the threaded hole provided by the utility model comprises a calibration rod 1 and a sleeve 2; the correcting rod 1 comprises a correcting rod body 1.1 and a detection standard part 1.2 arranged on the correcting rod body 1.1, wherein the detection standard part 1.2 is of a screw rod structure matched with a detected threaded hole 01; the sleeve 2 is sleeved on the rod checking body 1.1, and a step structure is formed between the sleeve and the detection standard component 1.2; the detection standard component 1.2 is vertically screwed into the detected threaded hole 01, and the perpendicularity of the detected threaded hole 01 is judged by judging the planeness of the step structure. Preference is given here to: the check rod body 1.1 is further provided with a detection standard plane 1.4 arranged between the check rod body 1.1 and the detection standard component 1.2, and when the sleeve 2 is sleeved on the check rod body 1.1, the lower end face 2.1 of the sleeve is aligned with the detection standard plane 1.4 to form a reference plane for judging the size of a gap between the threaded hole verticality detection device and the upper end face of the detected threaded hole.
Optionally, in order to facilitate the detection standard component 1.2 to be easily screwed into the detected threaded hole 01, a handle 1.3 for facilitating the screwing of the detection standard component 1.2 into the detected threaded hole 01 is further arranged on the calibration rod body 1.1; the handle 1.3 is fixedly arranged at one end of the check rod body 1.1 far away from the detection standard plane 1.4. Preference is given here to: for the convenience of the handle 1.3 can dismantle, the stick body 1.1 of school is kept away from one of detection standard plane 1.4 and is served and be equipped with a through-hole that runs through the setting, handle 1.3 detachably installs in the through-hole to when accomodating threaded hole straightness detection device that hangs down, demolish handle 1.3, with the storage space that reduces threaded hole straightness detection device that hangs down.
Optionally, in order to increase the flatness of the reference plane, the sleeve 2 and the rod checking body 1.1 are matched with each other by using an H-tolerance.
Optionally, in order to facilitate reading the length of the detection standard component 1.2 screwed into the detected threaded hole, the detection standard component 1.2 is further provided with scales.
The utility model also provides a threaded hole perpendicularity detection method for detecting the perpendicularity of the detected threaded hole by adopting the threaded hole perpendicularity detection device, which comprises the following steps:
step one, preparation before detection: the sleeve and the calibration rod are mutually installed, and the lower end face of the sleeve is ensured to be aligned with the detection standard plane, so that the flatness of a reference plane for judging the size of a gap between the threaded hole verticality detection device and the upper end face of the detected threaded hole is ensured;
step two, detection: vertically screwing the detection standard component into the detected threaded hole until the detection standard component cannot be screwed into the detected threaded hole; and the verticality of the detected threaded hole is judged according to the sizes of gaps at different positions between the lower end face of the sleeve and the upper end face of the detected threaded hole. Preference is given here to: for the length of guaranteeing to detect the standard component with be detected the screw thread length of screw hole equal, detect the standard component with be detected the screw thread parameter of screw hole the same, the length a plurality of standard component that the screw thread parameter of screw hole is the same for detecting to the detection standard component with being different to detect the screw hole through chooseing for use with being detected the screw thread parameter of screw hole, the length the same, thereby guarantee to detect the straightness that hangs down of screw hole and detect the equal accuracy to the difference.
Optionally, the following steps are adopted to judge the perpendicularity of the detected threaded hole:
s2.1, detecting the sizes of gaps at different positions between the lower end face of the sleeve and the upper end face of the threaded hole to be detected, and finding out a minimum gap L1 and a maximum gap L2 between the lower end face of the sleeve and the upper end face of the threaded hole to be detected;
s2.2, calculating the distance x between the central axis of the detected threaded hole and the vertical axis through the minimum clearance L1 and the maximum clearance L2 between the lower end surface of the sleeve and the upper end surface of the detected threaded hole1：
Wherein: Δ x ═ L2-L1, D1Expressed as the length of the thread of the tapped hole to be tested, D2Expressed as the outer diameter of the sleeve;
s2.3, judging the verticality of the detected threaded hole: when x is1If not, judging that the detected threaded hole is not in a vertical state.
According to the threaded hole perpendicularity detection device provided by the utility model, the perpendicularity of the threaded hole is detected by taking the plane formed by combining the sleeve and the correcting rod as a reference plane, and the distance between the central axis of the threaded hole and the reference vertical axis is calculated according to the size of the gap between the plane formed by combining the sleeve and the correcting rod and the threaded hole, so that whether the perpendicularity of the threaded hole meets the requirement or not is judged.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A threaded hole perpendicularity detection device is characterized by comprising a calibration rod and a sleeve;
the correcting rod comprises a correcting rod body and a detection standard part arranged on the correcting rod body, wherein the detection standard part is of a screw rod structure matched with the detected threaded hole;
the sleeve is sleeved on the rod calibration body, and a step structure is formed between the sleeve and the detection standard component;
the detection standard component is vertically screwed into the detected threaded hole, and the verticality of the detected threaded hole is judged by judging the planeness of the step structure.
2. The threaded hole perpendicularity detection device as claimed in claim 1, wherein the sleeve and the check rod body are matched with each other by adopting an H-level tolerance.
3. The threaded hole perpendicularity detecting device according to claim 1, wherein a scale in a length direction is further arranged on the detection standard member.
4. The threaded hole perpendicularity detecting device as claimed in claim 1, wherein a handle for facilitating screwing of the detection standard component into the detected threaded hole is further arranged on the calibration rod body.
5. The threaded hole perpendicularity detection device as claimed in claim 4, wherein a handle is fixedly mounted on the calibration rod body.
6. The threaded hole perpendicularity detection device as claimed in claim 4, wherein a through hole is formed in the calibration rod body in a penetrating mode, and a handle is detachably mounted in the through hole.
7. The device for detecting the perpendicularity of a threaded hole according to any one of claims 1 to 6, wherein the detection standard member is provided with a plurality of pieces with different thread diameters, thread pitches and thread lengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220203051.4U CN216694790U (en) | 2022-01-25 | 2022-01-25 | Threaded hole perpendicularity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220203051.4U CN216694790U (en) | 2022-01-25 | 2022-01-25 | Threaded hole perpendicularity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216694790U true CN216694790U (en) | 2022-06-07 |
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|---|---|---|---|
| CN202220203051.4U Active CN216694790U (en) | 2022-01-25 | 2022-01-25 | Threaded hole perpendicularity detection device |
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| CN (1) | CN216694790U (en) |
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- 2022-01-25 CN CN202220203051.4U patent/CN216694790U/en active Active
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