CN208269873U - Contact automatically measuring diameter instrument - Google Patents
Contact automatically measuring diameter instrument Download PDFInfo
- Publication number
- CN208269873U CN208269873U CN201820933202.5U CN201820933202U CN208269873U CN 208269873 U CN208269873 U CN 208269873U CN 201820933202 U CN201820933202 U CN 201820933202U CN 208269873 U CN208269873 U CN 208269873U
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- CN
- China
- Prior art keywords
- screw rod
- optical axis
- sliding block
- bedframe
- bearing support
- 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.)
- Expired - Fee Related
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Abstract
The utility model is a kind of contact automatically measuring diameter instrument, it has bedframe, screw rod, optical axis and stepper motor, stepper motor is mounted on bedframe, sliding block is housed on screw rod, limit switches bearing support on sliding block, upper limit switch and lower position switch are housed on limit switch bearing support, screw rod upper end is mounted on screw rod baffle, lower end connect transmission with stepper motor by shaft coupling, there are optical axis firmware and optical axis between screw rod baffle and bedframe, it is rolled on optical axis on sliding block equipped with idler wheel, zero point baffle is housed on screw rod baffle, there is the bearing support for placing measured workpiece on bedframe, it is electrically connected between stepper motor and single-chip microcontroller and driver, bearing support is the recessed card that a pair has arch cutting edge, it is placed on the support plinth of dovetail chute structure.The features such as the utility model is small in size, light-weight, precision is high, structure is simple and convenient to operate is suitble to school or material mechanics experiment room personnel to the rapid survey of diameter of work.
Description
Technical field
The utility model relates to a kind of measuring instrument, specifically a kind of contact automatically measuring diameter instrument.
Background technique
Currently, the method for cylinder diameter measurement is divided into two class of contact type measurement and non-contact measurement.Wherein, contact method
Measurement mainly has dimension layout method, coordinate measuring machine mensuration, electrical contact method etc., and eyes with non-contact method mainly has optical measuring method gentle
Dynamic measurement method etc..
1, dimension layout method
It is exactly ruler measurement for dimension layout method is popular, it can be common that the common graduated scale of Applied Science Laboratory, trip
Mark the measuring tools such as slide calliper rule, micrometer caliper.This measurement method is also most common, most common among numerous methods.
By taking vernier caliper as an example, its measurement accuracy generally can reach 0.01mm, but layman's measurement may make
At the trouble that reading is difficult, method is to grab moveable measurement firstly the need of zeroing and be pushed into fixation measuring and grab side, and two grab and connect
It returns to zero when touching, moveable measurement is grabbed to grab with fixation measuring separates, centre, which places to grab two again after measured workpiece, to be closed up, until two
It grabs while reading registration when touching measured object.
The core of electronic digital indicator is capacitive grating mechanism, and capacitive grating mechanism is a kind of unique length measurement sensor.Its main (core
The heart) it is partially capacitor grid transducer.Capacitor grid transducer is corresponding with vernier caliper, and moveable measurement grabs installation capacitor grid transducer
Dynamic ruler, fixation measuring grab the scale of installation capacitor grid transducer.It is between the two capacitive coupling, grabs upper setting in moveable measurement
Emission electrode, fixation measuring grab setting receiving electrode.The different AC signal of multiple phases can be transmitted to by emission electrode
Receiving electrode.To be converted into digital information.Achieve the purpose that digital display measures.
2, coordinate measuring machine mensuration
Coordinate measuring machine (Coordinate Measuring Machine, abbreviation CMM) is that most representative coordinate is surveyed
Measuring appratus.
The working principle of coordinate measuring machine is exactly by establishing a coordinate system, then by the measurement point on measured workpiece surface
It is corresponding to project in established coordinate system, the spatial model of surveyed workpiece can be constructed.There is the spatial model of workpiece,
Coordinate measuring machine can calculate required geometric parameter.
Coordinate measuring machine there is currently the problem of have it is stringenter to environmental requirement；The guide rail machining accuracy of coordinate measuring machine
It is very high, and the fit clearance very little with air-bearing, it is necessary to assure there is no dust or other impurity above guide rail, otherwise just holds
Air-bearing and guide rail is easily caused to scratch；And its manufacture craft is extremely complex, and cost of manufacture is also relatively high.
3, it is in electrical contact method
Intuitivism apprehension is exactly that measured workpiece can only obtain measured value when being connected as conductor, two sides energization measurement body contact.
Electrical contact method measurement working principle is that measured workpiece is conductive cylindrical body, and after clamping, the electrical contact piece of two sides is opened
Begin to center movement, when touching tested moment, both ends are connected, thus obtain corresponding registration, meanwhile, both ends contact chip is restored to
Initial position.
4, optical measuring method
Optical measuring method possesses the advantages that non-contact, quick, precision is high.Its measurement method has industrial television, image sensing
Device, laser beam flying etc..
5, pneumatic gauging method
Pneumatic gauging method is exactly to measure using the flow and pressure of air to workpiece size, and air-gauge is exactly answered
It is measured with the method.Air mass flow and pressure relationship proportional to the size in gap is utilized in air-gauge, while right
It is inversely proportional between the pressure answered and flow to be related to this physical principle.
It is a kind of contactless and relatively high measurement accuracy measuring instrument, its advantage is its measurement essence
It spends high, can achieve 0.005 inch, when measuring closed tolerance, the Measurement Resolution of air-gauge is even more that can achieve
0.000002 inch (0.05 μm).In addition, air-gauge can also measure low various hardness, highly polished, thin plate or other
The part of special material.
Optical measuring method is common with pneumatic gauging method the problem is that manufacturing cost is relatively high, multiple compared with manufacturing process
It is miscellaneous, maintenance cost is higher, manufacture is expensive.
Summary of the invention
The utility model is in view of the above-mentioned problems, propose a kind of contact automatically measuring diameter instrument, the characteristics of this measuring instrument
The features such as being small in size, light-weight, precision is high, structure is simple and convenient to operate, is suitble to school or material mechanics experiment room personnel couple
The rapid survey of diameter of work.
This contact automatically measuring diameter instrument of the utility model, it has bedframe, screw rod, optical axis and stepping electricity
Machine, it is characterised in that stepper motor is mounted on bedframe, and sliding block is housed on screw rod, limit switches bearing support on sliding block,
Upper limit switch and lower position switch are housed, screw rod upper end is mounted on screw rod baffle, and lower end passes through on limit switch bearing support
Shaft coupling connect transmission with stepper motor, has optical axis firmware and optical axis between screw rod baffle and bedframe, idler wheel is housed on sliding block
It is rolled on optical axis, zero point baffle is housed on screw rod baffle, there is the bearing support for placing measured workpiece, stepper motor on bedframe
It is electrically connected between single-chip microcontroller and driver.
The bearing support is the recessed card that a pair has arch cutting edge, is placed on the support plinth of dovetail chute structure, dovetail
Slot is opened on upper branching holder, and dovetail is opened on lower bearing support.
The optical axis is two, parallel with screw rod to install, and idler wheel is in optical axis upper roller there are two every sides on sliding block, to keep
The balance that sliding block moves up and down.
There is the nut with screw rod cooperation on sliding block.
Single-chip microcontroller is STC single-chip microcontroller, and driver is A4988 driver.
Equipped with the control switch and display being connect with single-chip microcontroller on bedframe.
The lower position switch and workpiece contact point are downwardly projecting horizontal cutting edge line, to be convenient for measuring variable diameter workpiece
Diameter.
Optical axis fixing piece is 4020 type aluminiums.
The working principle of the utility model is as follows:
This measuring instrument control core of the utility model is STC single-chip microcontroller and A4988 driver, cooperation 42 steppings electricity
Machine, so that lead screw be driven to rotate, moves up and down the sliding block cooperated with lead screw by 12V power drives.Using upper and lower limit switch
As activation signal feedback device, it is connect by limit switch bearing support with sliding block.It is controlled by SCM program, makes upper limit
Program is reset when switch contact is to zero point Contact plate, and sliding block moves down, until lower position switch touches measured workpiece, then is passed through
Program conversion can converse result (reading) display on the display panel.In order to keep sliding block more firm, idler wheel is installed on sliding block
Cooperate optical axis, sliding block is allowed to move along optical axis.In addition, this measuring instrument there are also bearing spider, 4020 type side's aluminium track optical axis firmwares,
The accessories such as measured workpiece fulcrum bearing, shaft coupling are as auxiliary device.
The features such as the utility model is small in size, light-weight, precision is high, structure is simple and convenient to operate is suitble to school or material
Rapid survey of the Mechanics Laboratory personnel to diameter of work.
Detailed description of the invention
Fig. 1 is the perspective view of the utility model.
Fig. 2 is the utility model main view.
Fig. 3 is left view (broken section).
Fig. 4 is top view (broken section).
Fig. 5 is that idler wheel and its roller rod and idler wheel axle sleeve integrate perspective view.
Fig. 6 is sliding block perspective view.
Fig. 7 is control switch schematic diagram.
Fig. 8 is utility model works schematic illustration.
In Fig. 1-7, the label of each components is as follows:
1- bedframe；2- lower bearing support；3- upper branching holder；4- support frame；5- lower position switch；The bearing of 6- limit switch
Frame；7- zero point baffle；8- screw rod baffle；9- optical axis firmware；10- optical axis；11- screw rod；12- sliding block；13- nut；14- idler wheel；
15- idler wheel sleeve；16- roller rod；17- shaft coupling；18- motor baffle；19- stepper motor；20- control switch；21- is shown
Device；22- upper limit switch.
20-1--- start button；20-2--- stops key；20-3--- moves down key；20-4--- moves up key.
Specific embodiment
The utility model is further illustrated with example with reference to the accompanying drawing.
As shown in figures 1-8.Bedframe 1 is welded with stainless steel square frame section, and wherein one end forms a hole shape peace
Stepper motor 19 being filled, and electricity consumption machine baffle 18 separates, the lower end of screw rod 11 is driven by shaft coupling 17 and stepper motor axis connection,
Upper end is mounted on screw rod baffle 8 by accessories such as bearings, and screw rod baffle is fixed on optical axis firmware 9, and optical axis firmware is 4020
Type side's aluminum profile, lower end are fixed on bedframe.Each guide rail for fixing an optical axis 10 as idler wheel 14 in optical axis firmware two sides.
The sliding block moved on screw rod is coupled by the screw thread channel on itself, that is, nut 13.Four rolling passes through idler wheel sleeve
15 and roller rod 16 be mounted on sliding block.Limit switch bearing support 6 is fixed on sliding block, and by upper limit switch 22 and lower limit
Switch 5 is mounted on the upper side and lower side of limit switch bearing support, is allowed to be able to and be fixed on the zero point gear on screw rod baffle
Plate 7 and measured workpiece contact.
Bearing support 4 is the bracket being fixed on measured workpiece on bedframe, by the branch the characteristics of for cylindrical work
Frame does arch cutting edge slot in a pair, is placed in the both ends at the bearing seat of honour 3, guarantees the axis horizontal that workpiece is kept when measurement.For becoming
Diameter workpiece can increase some gaskets as attachment, increase and decrease the height of certain end bearing support when necessary to guarantee axis horizontal.
As described above, the contact point of the switch is made into guarantee that lower position switch can be contacted with the effective of variable diameter workpiece
Cutting edge line thus can easily measure the diameter of workpiece surface most recess.
Upper limit switch, lower position switch and the single-chip microcontroller of control, driver, control switch and display etc. are
Use STC single-chip microcontroller, driver for A4988 driver for commercially available accessory, such as single-chip microcontroller.The control program of single-chip microcontroller is according to explanation
The explanation of book and specific requirement are write.
Remaining unmentioned components and label and connection relationship are as described above.
The course of work of this automatically measuring diameter instrument of this example is as follows:
Each route is first checked for, powers on and is switched on after confirmation is errorless.It places and presses start key after needing test piece,
Single-chip microcontroller will provide pulse signal, control motor main story, and sliding block moves up, until upper limit switch touches zero point contact plate,
Program is reset, while sliding block moves down.When lower position switch touches workpiece, single-chip microcontroller recording impulse number is slided at the same time
Block moves up, until (42 stepper motors are that electric impulse signal is changed into angular displacement switch control electricity to the umber of pulse of single-chip microcontroller record
Machine, as soon as when step actuator receives a pulse signal, it drive stepper motor by the direction of setting rotate one it is fixed
Angle, referred to as " step angle ", its rotation are run step by step with fixed angle.Can by control pulse number come
Angular displacement is controlled, to achieve the purpose that accurate positionin.1 umber of pulse=1 step angle [1.8 °], corresponding this example slider displacement is about
Equal to 0.0135mm) when reaching 18000 sliding block stopping (resetting to reset condition.Distance from zero point to measured workpiece
227mm is equivalent to 42 step actuators and receives the stroke that 16815 umber of pulse driving stepper motors turn over.), meanwhile, single-chip microcontroller
It calculates as the result is shown on registration plate.In addition, because other extraneous factors lead to sliding block operation card when sliding block is run in order to prevent
Extremely, so adding the control program that independent sliding block moves up and down and stops, and switch is connected, convenient for manually controlling.
The working principle of this example is as shown in Figure 8: the distance of setting zero point contact plate 7 to objective table 4 is L, and L1 is stepping electricity
Machine pulse signal imports program and the slider stroke that converts, to obtain measured workpiece diameter D=L- L1.
Claims (8)
1. a kind of contact automatically measuring diameter instrument, it has bedframe, screw rod, optical axis and stepper motor, it is characterised in that step
It is mounted on bedframe into motor, sliding block is housed on screw rod, limit switches bearing support on sliding block, on limit switch bearing support
Equipped with upper limit switch and lower position switch, screw rod upper end is mounted on screw rod baffle, and lower end passes through shaft coupling and stepper motor
Connection transmission has optical axis firmware and optical axis, rolls on optical axis on sliding block equipped with idler wheel, screw rod between screw rod baffle and bedframe
Zero point baffle is housed on baffle, there is the bearing support for placing measured workpiece, stepper motor and single-chip microcontroller and driver on bedframe
Between have electrical connection.
2. contact automatically measuring diameter instrument according to claim 1, it is characterised in that bearing support is that a pair has arch cutting edge
Recessed card, be placed on the support plinth of dovetail chute structure, dovetail groove is opened on upper branching holder, and dovetail is opened in lower bearing support
On.
3. contact automatically measuring diameter instrument according to claim 1, it is characterised in that optical axis is two, parallel with screw rod to pacify
It fills, there are two idler wheels in optical axis upper roller for every side on sliding block.
4. contact automatically measuring diameter instrument according to claim 1, it is characterised in that there is the spiral shell with screw rod cooperation on sliding block
It is female.
5. contact automatically measuring diameter instrument according to claim 1, it is characterised in that single-chip microcontroller is STC single-chip microcontroller, driving
Device is A4988 driver.
6. contact automatically measuring diameter instrument according to claim 1, it is characterised in that be equipped on bedframe and single-chip microcontroller
The control switch and display of connection.
7. contact automatically measuring diameter instrument according to claim 1, it is characterised in that lower position switch and workpiece contact point
For downwardly projecting horizontal cutting edge line.
8. contact automatically measuring diameter instrument according to claim 1, it is characterised in that optical axis fixing piece is 4020 type aluminiums.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820933202.5U CN208269873U (en) | 2018-06-15 | 2018-06-15 | Contact automatically measuring diameter instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820933202.5U CN208269873U (en) | 2018-06-15 | 2018-06-15 | Contact automatically measuring diameter instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208269873U true CN208269873U (en) | 2018-12-21 |
Family
ID=64690518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820933202.5U Expired - Fee Related CN208269873U (en) | 2018-06-15 | 2018-06-15 | Contact automatically measuring diameter instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208269873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871255A (en) * | 2018-06-15 | 2018-11-23 | 红河学院 | Contact automatically measuring diameter instrument |
-
2018
- 2018-06-15 CN CN201820933202.5U patent/CN208269873U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871255A (en) * | 2018-06-15 | 2018-11-23 | 红河学院 | Contact automatically measuring diameter instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181221 Termination date: 20190615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |