CN112504050A - Portable internal thread detection device and detection method thereof - Google Patents
Portable internal thread detection device and detection method thereof Download PDFInfo
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- CN112504050A CN112504050A CN202010940201.5A CN202010940201A CN112504050A CN 112504050 A CN112504050 A CN 112504050A CN 202010940201 A CN202010940201 A CN 202010940201A CN 112504050 A CN112504050 A CN 112504050A
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- torque
- gauge
- measuring head
- internal thread
- detection device
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
Abstract
The invention provides a portable internal thread detection device and a detection method thereof, wherein the detection device comprises a handle part, a main body measurement part and a control part, the handle part is arranged below the rear part of the main body measurement part, the control part is arranged on one side opposite to the handle part, the main body measurement part comprises a driving assembly, a planetary gear train speed reduction assembly, a torque sensor and a measuring head replacement assembly, a measuring head is arranged on the measuring head replacement assembly, and the driving assembly actuates the measuring head to rotate. The portable internal thread detection device provided by the invention is convenient for handheld online thread detection through the L-shaped integral design, and the labor intensity of workers is reduced; the internal thread can be subjected to go-no go gauge detection, the detection efficiency of the threaded hole is improved, and the detection time is saved.
Description
Technical Field
The invention belongs to the technical field of engineering technology measurement, and particularly relates to a portable internal thread detection device and a detection method thereof.
Background
The product taking the screw thread as the connection form is widely applied to the fields of aviation, aerospace, ships, construction, medical treatment and the like due to the characteristics of convenient installation, high reliability and the like. The thread quality factors are generally influenced by base materials, surface treatment processes, thread comprehensive parameters and the like, wherein the detection of the thread geometric comprehensive parameters is widely used as an important basis for factory evaluation quality of thread products.
The existing method for detecting the geometric parameter of the thread mainly adopts contact and non-contact measurement methods, wherein the contact measurement mainly comprises a three-needle method, a thread comprehensive scanning measurement method and a working gauge inspection method; the non-contact measurement mainly includes image measurement, machine vision measurement, and endoscopic measurement. Although the efficiency of the three-needle method measurement is high, only the pitch diameter of the thread can be measured, and the evaluation parameters are single; the thread comprehensive scanning measurement method can measure the full parameters of the thread, but has complex detection equipment, low function utilization rate and higher instrument cost, and is not beneficial to the operation in a production line form; the inspection method of the working gauge can realize comprehensive measurement of the threads, can simulate the comprehensive use working conditions of the threads, but has low inspection efficiency and can not carry out quantitative standard examination; the non-contact measurement such as image measurement, machine vision measurement can realize comprehensive parameter detection, but calibration efficiency is lower, with high costs and to the environmental requirement higher, is unfavorable for workshop production detection operation.
Disclosure of Invention
In order to solve at least one of the technical problems, the invention adopts the technical scheme that a portable internal thread detection device and a detection method thereof are provided, and a practical and effective boundary principle is adopted to comprehensively detect a workpiece threaded hole so as to solve the problems of low calibration efficiency, high cost and incapability of quantitative standard examination in the prior art.
In order to at least achieve one of the above purposes, the invention adopts the technical scheme that:
the invention provides a portable internal thread detection device, comprising: handle portion, main part measuring part and control portion, the rear portion below of main part measuring part is provided with handle portion, and one side of relative handle portion is provided with the control portion, the subassembly is changed including drive assembly, planetary gear train speed reduction subassembly, torque sensor and gauge head to the main part measuring part, drive assembly's output and planetary gear train speed reduction subassembly's input are connected, planetary gear train speed reduction subassembly's output through first connecting axle with torque sensor connects, torque sensor pass through the second connecting axle with the subassembly is changed to the gauge head and is connected, install the gauge head on the subassembly is changed to the gauge head, drive assembly passes through planetary gear train speed reduction subassembly, torque sensor and gauge head change subassembly actuation the gauge head rotates.
Further, the driving assembly is a direct current motor.
Furthermore, the planetary gear train speed reduction assembly consists of three groups of NGW type planetary gear trains.
Further, the measuring head replacing component comprises a spring sleeve and a measuring head tool, the measuring head tool is connected with the spring sleeve through a deep groove, and the measuring head is fixedly installed in a matched mode through a Morse cone and a taper hole.
Further, the handle portion comprises a power supply module, a trigger module and a trigger button, the trigger button is electrically connected with the trigger module, and the output end of the trigger module is connected with the direct current motor to control the rotation of the direct current motor.
Further, the power supply module is a rechargeable lithium battery with 12V direct-current voltage, and the trigger module is a current limiting device in the form of an electric brush.
Further, the control part comprises a lower computer control module, a torque signal amplifier and a torque adjusting knob, the torque sensor is electrically connected with the torque signal amplifier, the torque signal amplifier is electrically connected with the lower computer control module, and the lower computer control module is further electrically connected with the trigger module and the alarm indicator lamp.
Further, the detection device further comprises an upper computer assembly, the upper computer assembly is communicated with the lower computer control module through a 485 protocol, and the upper computer assembly is provided with measurement software.
The invention also provides a detection method adopting the portable detection device, which comprises the following specific steps:
s1, selecting a corresponding go/no-go gauge according to the specification of the threaded hole of the workpiece to be detected, replacing the measuring head, fixing the measuring head at the front end of the main body measuring part through a measuring head tool, adjusting a torque adjusting knob and setting a stop torque;
s2, triggering the trigger button to electrify the DC motor, driving the three groups of NGW planetary gear trains to rotate by the output shaft of the motor, and increasing the torque of the first connecting shaft connected with the output end of the planetary gear trains through the deceleration function of the planetary gear trains;
s3, the output end of the first connecting shaft drives the torque sensor to rotate, and the output end of the torque sensor transmits the torque to the measuring head through the second connecting shaft;
s4, screwing the measuring head into a threaded hole of a workpiece to be detected along the axial direction of the threaded hole, reversely inputting reverse torque generated by the threads in the meshing process into a torque sensor through a second connecting shaft, inputting the torque sensor into a torque signal amplifier by converting torque strain into analog quantity, and transmitting a torque value to an upper computer component for judgment in a 485 signal form after conversion by the torque signal amplifier;
s5, the judgment result is used as an input signal of an alarm indicator light, namely the torque value is qualified, the indicator light is not on, otherwise, the indicator light is on; meanwhile, the torque value of the judgment result is uploaded to an upper computer component for displaying and storing;
and S6, reversely rotating the measuring head, withdrawing the threaded hole and finishing the detection process.
Further, in step S5, the method for determining the torque value is:
1) treat that the work piece is qualified, the pilot lamp is not bright: firstly, screwing the general gauge measuring head into a threaded hole of a workpiece to be detected, wherein the reverse torque generated by thread matching is smaller than the currently set stop torque, and the general gauge measuring head smoothly passes through the threaded hole of the workpiece to be detected; then screwing the no-go gauge measuring head into a threaded hole of the workpiece to be detected, wherein the reverse torque generated by thread matching is more than or equal to the currently set stop torque, and the no-go gauge measuring head does not pass through the threaded hole of the workpiece to be detected;
2) treat that the work piece is unqualified, the pilot lamp is bright: when the go gauge measuring head is screwed into a threaded hole of the workpiece to be detected, the reverse torque generated by thread matching is larger than or equal to the currently set stop torque, the go gauge measuring head cannot pass through the threaded hole of the workpiece to be detected, and the indicator light is turned on at the moment to prompt that the workpiece to be detected is unqualified; or when the screw hole of waiting to examine the work piece is screwed in to the no-go gauge head, because the reverse moment of torsion that screw-thread fit produced is less than the moment of torsion that ends that sets up at present, the no-go gauge head is through waiting to examine the screw hole of work piece, and the pilot lamp lights this moment, and the suggestion is waited to examine the work piece unqualified.
Compared with the prior art, the portable internal thread detection device and the detection method thereof provided by the invention have the beneficial effects that: the portable internal thread detection device provided by the invention is convenient for handheld online thread detection through the L-shaped integral design, and the labor intensity of workers is reduced; the internal thread can be subjected to go-no go gauge detection, the detection efficiency of the threaded hole is improved, and the detection time is saved.
In a word, the invention provides the internal thread detection device which is simple in structure, high in detection efficiency and convenient to operate, and has wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a portable internal thread detection device according to the present invention.
The device comprises a direct current motor 1, a planetary gear train speed reducing assembly 2, a first connecting shaft 3, a torque sensor 4, a second connecting shaft 5, a measuring head replacing assembly 6, a measuring head 7, a trigger button 8 and a torque adjusting knob 9.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. Note that the following described embodiments are illustrative only for explaining the present invention, and are not to be construed as limiting the present invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection or electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The portable internal thread detection device and the detection method thereof provided by the invention are described in detail by specific embodiments as follows:
as shown in fig. 1, the portable internal thread detection device provided by the invention comprises: handle portion, main part measuring part, control part and host computer subassembly, the rear portion below of main part measuring part is provided with handle portion, makes detection device wholly is "L" type, and the handheld online screw thread of being convenient for detects, and one side of relative handle portion is provided with the control part.
The main body measuring part comprises a driving component, a planetary gear train speed reducing component 2, a torque sensor 4, a measuring head replacing component 6 and an alarm indicator lamp, wherein the driving component is preferably a direct current motor 1, the output end of the direct current motor 1 is connected with the input end of the planetary gear train speed reducing component 2, the planetary gear train speed reducing component 2 is composed of three groups of NGW type planetary gear trains, the output end of each planetary gear train is connected with the torque sensor 4 through a first connecting shaft 3, the torque sensor 4 is connected with the measuring head replacing component 6 through a second connecting shaft 5, the measuring head replacing component 6 comprises a spring sleeve and a measuring head tool, the measuring head tool is connected with the spring sleeve through a deep groove, a measuring head 7 is fixedly installed with the measuring head tool through a Morse cone and a cone hole in a matched mode, the direct current motor 1 is fixedly installed with the measuring head tool through the planetary gear train speed, The torque sensor 4 and the gauge head replacement assembly 6 actuate the gauge head 7 to rotate.
The handle part comprises a power supply module, a trigger module and a trigger button 8, wherein the trigger button 8 is electrically connected with the trigger module, the output end of the trigger module is connected with the direct current motor 1 to control the rotation of the direct current motor 1, the power supply module is a 12V direct current voltage rechargeable lithium battery, and the trigger module is a current limiting device in the form of an electric brush.
The control part comprises a lower computer control module, a torque signal amplifier and a torque adjusting knob 9, the torque sensor 4 is electrically connected with the torque signal amplifier, the torque signal amplifier is electrically connected with the lower computer control module, the lower computer control module is also electrically connected with the trigger module and the alarm indicating lamp, and the torque adjusting knob 9 is arranged at the upper end of the control part.
According to the upper computer assembly, the upper computer assembly is communicated with the lower computer control module through a 485 protocol, and measurement software is installed on the upper computer assembly.
The invention also provides a detection method adopting the portable detection device, which comprises the following specific steps:
s1, selecting a corresponding go/no-go gauge according to the specification of the threaded hole of the workpiece to be detected, replacing the measuring head, fixing the measuring head at the front end of the main body measuring part through a measuring head tool, adjusting a torque adjusting knob and setting a stop torque;
s2, triggering the trigger button to electrify the DC motor, driving the three groups of NGW planetary gear trains to rotate by the output shaft of the motor, and increasing the torque of the first connecting shaft connected with the output end of the planetary gear trains through the deceleration function of the planetary gear trains;
s3, the output end of the first connecting shaft drives the torque sensor to rotate, and the output end of the torque sensor transmits the torque to the measuring head through the second connecting shaft;
s4, screwing the measuring head into a threaded hole of a workpiece to be detected along the axial direction of the threaded hole, reversely inputting reverse torque generated by the threads in the meshing process into a torque sensor through a second connecting shaft, inputting the torque sensor into a torque signal amplifier by converting torque strain into analog quantity, and transmitting a torque value to an upper computer component for judgment in a 485 signal form after conversion by the torque signal amplifier;
s5, the judgment result is used as an input signal of an alarm indicator light, namely the torque value is qualified, the indicator light is not on, otherwise, the indicator light is on; meanwhile, the torque value of the judgment result is uploaded to an upper computer component for displaying and storing;
the method for judging whether the torque value is qualified or not comprises the following steps:
1) treat that the work piece is qualified, the pilot lamp is not bright: firstly, screwing the general gauge measuring head into a threaded hole of a workpiece to be detected, wherein the reverse torque generated by thread matching is smaller than the currently set stop torque, and the general gauge measuring head smoothly passes through the threaded hole of the workpiece to be detected; then screwing the no-go gauge measuring head into a threaded hole of the workpiece to be detected, wherein the reverse torque generated by thread matching is more than or equal to the currently set stop torque, and the no-go gauge measuring head does not pass through the threaded hole of the workpiece to be detected;
2) treat that the work piece is unqualified, the pilot lamp is bright: when the go gauge measuring head is screwed into a threaded hole of the workpiece to be detected, the reverse torque generated by thread matching is larger than or equal to the currently set stop torque, the go gauge measuring head cannot pass through the threaded hole of the workpiece to be detected, and the indicator light is turned on at the moment to prompt that the workpiece to be detected is unqualified; or when the screw hole of waiting to examine the work piece is screwed in to the no-go gauge head, because the reverse moment of torsion that screw-thread fit produced is less than the moment of torsion that ends that sets up at present, the no-go gauge head is through waiting to examine the screw hole of work piece, and the pilot lamp lights this moment, and the suggestion is waited to examine the work piece unqualified.
And S6, reversely rotating the measuring head, withdrawing the threaded hole and finishing the detection process.
Compared with the prior art, the portable internal thread detection device and the detection method thereof provided by the invention have the beneficial effects that: the portable internal thread detection device provided by the invention is convenient for handheld online thread detection through the L-shaped integral design, and the labor intensity of workers is reduced; the internal thread can be subjected to go-no go gauge detection, the detection efficiency of the threaded hole is improved, and the detection time is saved.
In a word, the invention provides the internal thread detection device which is simple in structure, high in detection efficiency and convenient to operate, and has wide application prospect.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Claims (10)
1. The utility model provides a portable internal thread detection device, its characterized in that, includes handle portion, main part measuring part and control division, the rear portion below of main part measuring part is provided with handle portion, and one side of relative handle portion is provided with the control division, the main part measuring part is including drive assembly, planetary gear train speed reduction subassembly, torque sensor and gauge head change subassembly, drive assembly's output and planetary gear train speed reduction subassembly's input are connected, planetary gear train speed reduction subassembly's output pass through first connecting axle with torque sensor connects, torque sensor pass through the second connecting axle with the subassembly is changed to the gauge head and is connected, install the gauge head on the subassembly is changed to the gauge head, drive assembly passes through planetary gear train speed reduction subassembly, torque sensor and the actuation of gauge head change subassembly the gauge head rotates.
2. The portable internal thread detection device of claim 1, wherein the drive assembly is a dc motor.
3. The portable internal thread detection device of claim 2, wherein the planetary gear train speed reduction assembly is composed of three sets of NGW type planetary gear trains.
4. The portable internal thread detection device according to claim 3, wherein the gauge head replacement assembly comprises a spring sleeve and a gauge head tool, the gauge head tool is connected with the spring sleeve through a deep groove, and the gauge head is fixedly installed with the gauge head tool through a Morse cone and a taper hole in a matched mode.
5. The portable internal thread detection device of claim 4, wherein the handle portion comprises a power supply module, a trigger module and a trigger button, the trigger button is electrically connected to the trigger module, and an output end of the trigger module is connected to the DC motor to control rotation of the DC motor.
6. A portable internal thread detection device according to claim 5, wherein the power supply module is a rechargeable lithium battery with 12V DC voltage, and the triggering module is a current limiting device in the form of a brush.
7. The portable internal thread detection device according to claim 6, wherein the control portion comprises a lower computer control module, a torque signal amplifier and a torque adjusting knob, the torque sensor is electrically connected to the torque signal amplifier, the torque signal amplifier is electrically connected to the lower computer control module, and the lower computer control module is further electrically connected to the trigger module and an alarm indicator.
8. The portable internal thread detection device of claim 7, further comprising an upper computer assembly, wherein the upper computer assembly is in communication with the lower computer control module through a 485 protocol, and the upper computer assembly is provided with measurement software.
9. A detection method adopting the portable internal thread detection device as claimed in claim 8, characterized by comprising the following specific steps:
s1, selecting a corresponding go/no-go gauge according to the specification of the threaded hole of the workpiece to be detected, replacing the measuring head, fixing the measuring head at the front end of the main body measuring part through a measuring head tool, adjusting a torque adjusting knob and setting a stop torque;
s2, triggering the trigger button to electrify the DC motor, driving the three groups of NGW planetary gear trains to rotate by the output shaft of the motor, and increasing the torque of the first connecting shaft connected with the output end of the planetary gear trains through the deceleration function of the planetary gear trains;
s3, the output end of the first connecting shaft drives the torque sensor to rotate, and the output end of the torque sensor transmits the torque to the measuring head through the second connecting shaft;
s4, screwing the measuring head into a threaded hole of a workpiece to be detected along the axial direction of the threaded hole, reversely inputting reverse torque generated by the threads in the meshing process into a torque sensor through a second connecting shaft, inputting the torque sensor into a torque signal amplifier by converting torque strain into analog quantity, and transmitting a torque value to an upper computer component for judgment in a 485 signal form after conversion by the torque signal amplifier;
s5, the judgment result is used as an input signal of an alarm indicator light, namely the torque value is qualified, the indicator light is not on, otherwise, the indicator light is on; meanwhile, the torque value of the judgment result is uploaded to an upper computer component for displaying and storing;
and S6, reversely rotating the measuring head, withdrawing the threaded hole and finishing the detection process.
10. The detection method according to claim 9, wherein in step S5, the torque value is determined by:
1) treat that the work piece is qualified, the pilot lamp is not bright: firstly, screwing the general gauge measuring head into a threaded hole of a workpiece to be detected, wherein the reverse torque generated by thread matching is smaller than the currently set stop torque, and the general gauge measuring head smoothly passes through the threaded hole of the workpiece to be detected; then screwing the no-go gauge measuring head into a threaded hole of the workpiece to be detected, wherein the reverse torque generated by thread matching is more than or equal to the currently set stop torque, and the no-go gauge measuring head does not pass through the threaded hole of the workpiece to be detected;
2) treat that the work piece is unqualified, the pilot lamp is bright: when the go gauge measuring head is screwed into a threaded hole of the workpiece to be detected, the reverse torque generated by thread matching is larger than or equal to the currently set stop torque, the go gauge measuring head cannot pass through the threaded hole of the workpiece to be detected, and the indicator light is turned on at the moment to prompt that the workpiece to be detected is unqualified; or when the screw hole of waiting to examine the work piece is screwed in to the no-go gauge head, because the reverse moment of torsion that screw-thread fit produced is less than the moment of torsion that ends that sets up at present, the no-go gauge head is through waiting to examine the screw hole of work piece, and the pilot lamp lights this moment, and the suggestion is waited to examine the work piece unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010940201.5A CN112504050A (en) | 2020-09-09 | 2020-09-09 | Portable internal thread detection device and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010940201.5A CN112504050A (en) | 2020-09-09 | 2020-09-09 | Portable internal thread detection device and detection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608403A (en) * | 2022-03-15 | 2022-06-10 | 东风柳州汽车有限公司 | Detection pin and detection tool |
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2020
- 2020-09-09 CN CN202010940201.5A patent/CN112504050A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114608403A (en) * | 2022-03-15 | 2022-06-10 | 东风柳州汽车有限公司 | Detection pin and detection tool |
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