UA146163U - SLIDING MICROMETER - Google Patents

Abstract

The sliding micrometer consists of a base and a rail guide with two rolling carriages, a micrometer head together with a reading and computer device and a touch display, a set of setting measures, a temperature sensor. A ball heel is installed on the first rolling carriage. An adjustable support is placed on the second rolling carriage. A tripod and a heat-insulating tube are installed on the base together with a temperature sensor built into a thermally conductive magnet tip with thermal paste and connected via a wire to a digital temperature reading device.

Description

The useful model belongs to the control and measuring instruments for particularly precise measurements in workshop conditions.

There is a constant and great need for precision measurements in the production shop environment, with most of the dimensions of the measured parts limited to a range of 500 mm.

All contact micrometers use micrometric heads with a measuring range of 0...25 mm, 0...30 mm and 0...50 mm G11.

The expansion of measurement ranges in large micrometers is ensured by the use of variable fixed heels, but at the same time, the error of micrometer measurements increases rapidly.

For example, when measuring precision parts in the range of 0...400 mm, today it is necessary to have from 13 to 16 micrometers of different ranges, the error of which is from 1 μm to 7 μm /1, 2/. A large number of meters requires significant time and money for the ongoing service and calibration of each unit.

All modern micrometers require special temperature conditions of use (19...21 degrees Celsius) or several hours (2...6 hours) exposure of the meter and the measured part (together under the same conditions) to ensure a passport error, since none of the modern micrometers in the world have no means of temperature compensation.

The world's most precise submicron micrometer type "293-100-10" by Mishowo (Japan) 121 provides an error of 0.5 μm in a single limited range of 0...25 mm with flat measuring surfaces with a reduced diameter of 3.2 mm. The Japanese company does not produce micrometer heads and other micrometers over 25 mm with submicron indicators (21.

The world's most precise submicron indicators of the type "5 Oia! Rgo" of the Swiss firm "Buimas" IZ| have an error of 1.3 μm in the range of 0...25 mm and an error of 2.2 μm in the range of 0...100 mm with a constant measurement force of 1 N only in the vertical position, which excludes the possibility of horizontal measurements.

The world's most precise micron caliper of the "SHTSCYPU-150/0.001" type. of the company "MICROTECH" (Ukraine) |1| has an error of 5 μm in the range of 0...150 mm at a measurement force of 8 N on flat rectangular measuring surfaces (length 25 mm and width 3.5 mm).

Increasing the range of precision measurements of the bar tool requires the use of a calibrated device, rail guides and rolling carriages, while the error in the range of 0...550 mm is 20 μm /17.

Micrometric measuring devices, in comparison with indicator and rod measuring devices, have much smaller errors due to smaller radial clearances of the precision screw-nut pair and rather limited working strokes (25, 30 and 50 mm), while micrometric measuring devices are more mechanically adapted to the person precision measurements thanks to the step-by-step soft movement of the measuring rod.

There is a special gauge for measuring longitudinal precision parts in harsh laboratory conditions:

Precision superimposed indicator stands of the "Ipaisayug diateieg daidev" series with a resolution of 1 μm from the company "Ziagei" (USA) /4/ with errors from 5 μm (price from several thousand euros);

Particularly precise micrometric length gauges of the "I absopseri" series with a resolution of 0.01 μm from the company "Titov" (Switzerland) /5/ with submicron errors (price from several tens of thousands of euros).

The excessively high price of stands and length gauges in the absence of current temperature compensation in them limit their mass use in production workshops.

In order to reduce temperature differences and the influence of temperature elongations and contractions, a particularly precise meter together with the measured parts are kept in the normal conditions of the calibration laboratory (20 degrees Celsius) for 2...6 hours, which is impossible or quite difficult to ensure in workshop conditions, especially next to machine tool.

Modern machine tool production requires a precision gauge available to a person with an error of 2.5...3.5 μm in the measurement range from 0...350 mm to 0...550 mm in real temperature conditions of a machine shop (0...50 degrees Celsius), when the current temperature of the measured part can differ by 30 degrees Celsius from the normal temperature or from the current temperature of the meter itself.

None of the modern micrometers or other manual geometric gauges take into account the temperature elongation-contraction of the measured part and the gauge itself, which is important for precise shop measurements:

A steel rod with a length of 500 mm at a temperature of 35 degrees Celsius compared to normal conditions (20 degrees Celsius) will be elongated by 110 microns due to the effect of temperature, which is 11 times more than the passport error of the MK-500 micrometer (10 microns);

Parts made of aluminum, magnesium and copper alloys have significantly higher thermal expansion coefficients (1.6...2 times) compared to steel parts;

The parts that are measured immediately after mechanical machining have an increased temperature (up to 50 degrees Celsius) and an inflated size, which distorts the reliability of the measurement results;

Details that are measured after storage in refrigerated rooms (less than 0 degrees

Celsius) have a reduced size, which distorts the reliability of the results.

We conducted laboratory studies of additional errors due to heating of a digital micrometer (МКЦ-125/0.001) and a measured part (in the form of a KMD) with a length of 101.600 mm with temperature control by a digital contact thermometer (resolution 0.1 and error 0.5 degrees

Celsius), see Table 1

Table 1

Temperature Temperature KMD

Temperature of KMDA and MKuCtg", 101.6 mm Degrees Measurement error, KMD μm of the involved micrometer Degrees . and Celsius

Celsius

Normal for obo (MKTS-125 and 20.5 20.5

KMD101,6

Medium MKC-125,

Increased MKC-125

Raised for obo (MKTS-125 and 46.8 46.8

KMD101.6)

Our calculations of the temperature elongations of the micrometer steel bracket and the steel measured part coincided very well with the empirical additional temperature errors, which confirmed the possibility and feasibility of temperature control of the measured parts and the meter during shop measurements.

The purpose of the useful model "Sliding Micrometer" was to create a budget workshop meter with a 5...15 times extended range of particularly precise measurements.

A patent analogue of the useful model "Sliding micrometer" is a micrometric caliper according to the 127-year-old American patent 05 Mo 285684 |b6)|, in which a simplified micrometric head (without a ratchet) is installed on the precision feed mechanism, which moves the movable frame. This was to ensure a uniform feed and improved measurement performance.

Disadvantages of patent analog |6B| associated with the use of a traditional rod and moving frame, which do not provide the necessary precision of measurements.

A patent analogue of the useful model "Sliding micrometer" is a micrometric caliper according to the 126-year-old American patent О5 Mo 305963 G7|, in which a simplified micrometric (head without a ratchet) is rigidly fixed on the right end of the rod, on which the adjustable measuring sponge is moved step by step.

The disadvantages of the analogue patent |(|7| are related to the impossibility of particularly precise measurements with the existing design of the rod and adjustable sponge.

The patent analog of the useful model "Sliding Micrometer" is a micrometric caliper according to the 122-year-old American patent OB MoZ 84771 |B), in which a simplified micrometric head (without a ratchet) is installed between a movable frame and a collar of a precision feed mechanism, which moves step by step along a perforated rod

The disadvantages of the analog patent (8) are related to the impossibility of particularly precise measurements with the existing design of the rod and the adjustable movable frame.

A patent analogue of the useful model "Sliding micrometer" is a motorized gauge according to the American patent OB Mo 13237076 (9), in which a movable frame with a movable sponge, at the end of which a micrometric head is installed, moves step by step along a perforated rod.

The disadvantages of the analog patent (|9|) are related to the impossibility of providing particularly precise measurements on an ordinary caliper.

A patent analogue of the utility model "Sliding micrometer" is a micrometric caliper according to the 110-year-old US patent 05 Mo 2625745 (10), in which the first movable frame together with the "fixed sponge", the second movable frame with the movable sponge and the movable collar with micrometric head, which moves the second frame by movement.

Disadvantages of patent analogue |10)| associated with the impossibility of the proposed mechanical caliper system to provide a person with precise measurements.

A patent analogue of the useful model "Sliding micrometer" is a caliper according to the 55-year-old American patent 05 Mo 3276131 (11Y), in which the movable sponge is fixed on a toothed rod, which is moved using a toothed gear.

The disadvantage of the analog patent (|(11|) is the impossibility of providing a person with precise measurements using a toothed rack-gear pair whose movement error exceeds 100 μm per 300 mm.

A patent analogue of the useful model "Sliding micrometer" is a rod gauge according to the American patent OB Mo 3996669 |(12)|, in which specialists of the well-known innovative company "Magrov5" (Italy) proposed a vertical meter with a rail and a rolling carriage (analogue of a rod gauge).

The disadvantage of the analog patent (12|) is the impossibility of precise measurements of the person with the available measuring devices.

The patent that is the closest analogue of the useful model "Sliding micrometer" is the Ukrainian patent "Indicator calibration stand 4.0" according to the patent OA Mo 131773 (13), in which specialists of the Ukrainian company "MI-KROTECH" proposed to install a horizontal rail guide with two rolling carriages on the support. on one of which an indicator is fixed, which is calibrated, on the second rolling carriage, a micrometric head with a multi-functional computer measuring device together with a touch display is fixed, the stand also contains a set of length measures.

The disadvantages of the closest analog patent (13) are as follows:

It is very difficult or impossible to provide particularly precise measurements with the existing movements of the rolling carriage.

The proposed patent-the closest analogue |(13|) does not provide a solution to the problem of utility

From the "Sliding Micrometer" model.

A sliding micrometer with a base 1 and a rail guide 2 with two rolling carriages 3, with a micrometric head 4 together with a counting-computer device 5 and a touch display 6, with a set of measuring devices 7, with a temperature sensor 8, according to a useful model that a ball heel 9 is installed on the first rolling carriage Z, an adjustable support 10 is placed on the second rolling carriage Z, a tripod 11 and a heat-insulating tube 12 are installed on the base 1 together with a temperature sensor 8, built into a heat-conducting tip-magnet 13 with thermal paste 14 and attached through the wire 15 to the digital temperature measuring device 16.

The technical result consists in providing step-by-step precision micrometric measurements with current double temperature control and further compensation of temperature expansions of the gauge and the part.

A useful model is explained by the drawings, namely, Fig. 1 and Fig. 2.

The useful model "Sliding Micrometer" provides two modifications:

Universal modification, see Fig. 1, with a tripod 11 and a complete temperature unit (with a rigid fixation on a heat-insulating tube 12 of a heat-conducting tip-magnet 13 and a digital temperature reading device 16), which allows measuring the temperature of absolutely all parts (made of magnetic and non-magnetic materials);

Simplified modification, see Fig. 2, with a flexible connection using a wire 15 from the temperature sensor 8 to the digital temperature reading device 16.

The base 1, the rail guide 2, the carriages C, the micrometric head 4 together with the counter-computer device 5 and the touch display 6 are made in accordance with the prototype patent (13), while the specified structural elements 1...6 must be calculated and the corresponding measurement range.

The micrometric head 4 should be in the range of 0...50 mm to reduce the number of setting measures 7, but it can be different.

Institutional measures 7 can be combined into blocks, while the increase in error in these blocks should be taken into account. As setting measures 7, it is expedient to use appropriate nominal and class KMD, while the step of calibration units and blocks of setting measures 7 is equal to twice the length of the range of the micrometric head 4 (for the range 0...50 mm because the calibration step is 100 mm, for the range 0 ...25 mm calibration step is

50 mm). The total error of the units of measuring devices 7 should not exceed 1/3 of the passport error of the useful model "Sliding Micrometer".

The temperature unit consists of available parts of serial contact digital thermometers with a range of at least -20...-60 degrees Celsius, which must have a temperature sensor 8, a wire 15 and a digital temperature reading device, which are used in our useful model "Sliding Micrometer" .

The temperature sensor 8 must be contact, with a resolution of 0.1 degrees Celsius and an error of 0.2...0.6 degrees Celsius to reliably determine the temperatures of the useful model and the measured part.

The temperature sensor 8 is built into a heat-conducting tip-magnet 13, which has the form of a permanent ring magnet (from niobium or other heat-conducting magnetic material), see Fig.

Fig. 1 and Fig. 2.

The space between the temperature sensor 8 and the inner walls of the ring heat-conducting tip-magnet 13 is densely filled with thermal paste 14 to improve heat transfer and speed up the reading of the temperature of the object.

The temperature sensor 8 is connected to the digital temperature device 16 using a wire 15.

The heat-insulating tube 12 according to two modifications of the useful model can be:

Extended (100...300 mm) for universal modification;

Short (10...30 mm) for simplified modification.

The extended heat-insulating tube 12 has the following design features:

It is closed from the bottom with a heat-conducting tip-magnet 13 with a temperature sensor 8 and thermal paste 14;

A digital temperature measuring device 16 is fixed on top;

In the middle passes the wire 15, which connects the temperature sensor 8 and the digital temperature measuring device 16;

The heat-insulating tube 12 slides freely in the hole on the tripod console 11;

The thermal insulation tube 12 is installed vertically or at a small angle to the vertical (up to 20 angular degrees) for reliable gravitational clamping to the measured part or to

From rail guide 2;

The internal cross-section should be 5...12 mm or other in diameter;

The outer diameter of the heat-insulating tube 12 should be 8...16 mm.

The measured part is supported on the adjustable support 10, also clamped between the ball heel 9 and the measuring surface of the micrometric head 4.

Temperature sensor 8, mounted in a heat-conducting tip-magnet 13, which is filled with thermal paste 14.

According to two modifications of the useful models, the heat-conducting tips-magnets touch the measured part and the rail guide 2 in one of two ways:

For a universal modification (with an extended heat-insulating tube 12), the heat-conducting tip-magnet is pressed under the weight of the entire temperature block, which allows you to control the temperature of parts made of non-magnetic materials (copper alloys, aluminum, high-alloy stainless steel, hard alloy, other metals and alloys);

For a simplified modification (with a shortened heat-insulating tube 12), the heat-conducting tip-magnet is pressed under the action of magnetic attraction, which allows you to control only steel parts.

The digital temperature measuring device 16 displays the current temperature of the measured part, which is manually entered using the touch display 6 to the measuring computer device 5 and is further taken into account during measurements and mathematical compensation of temperature expansions.

Depending on the modification of the useful model, the digital temperature measuring device 16 has the following features:

Fixed on the upper end of the elongated heat-insulating tube 12 for universal modification, while the temperature block is rigidly connected by the elongated heat-insulating tube 12;

Attached to the base 1 (closer to the micrometer head 4) with double-sided tape or glue, the temperature block is quite flexible thanks to the wire 15.

The micrometric head 4 must be designed for a measurement range of 0...50 mm or more (at this time, the range of 0...50 mm is the maximum range for micrometric bo heads). The micrometric head 4 is fixed horizontally on the bracket of the base 1.

The counter-computer device 5 and the touch display should be made according to the well-known "IpieiIidepi" or "Tariei" technology with built-in mini- and microcomputers (14, 151) with the possibility of taking into account the TKLR of the measured part:

Group "5.5" - for glass, hard alloy;

Group "11.5" - for low-alloy iron alloys (structural steel);

Group "15.5" - for nickel alloys (stainless steels);

Group "17" - for copper alloys (copper, bronze, brass);

Group "23" - for aluminum alloys (silumin, duralumin).

Set of establishment measures 7 should provide the possibility of initial calibration at the beginning of each measurement. In the presence of an intelligent counting-computer device 5, it is possible to use a smaller number of standard measures, the length of which is a multiple of even numbers (2, 4, 6, 8, 10 times) to the range of the micrometric head 4 (50 mm or 25 mm).

The temperature sensor 8 together with the digital temperature measuring device 16 should provide an error of temperature measurements of 0.2...1 degrees Celsius in the range - 0...50 degrees Celsius.

A special digital thermometer (consisting of a heat-conducting tip-magnet 13, temperature sensor 8, thermal paste 14, wire 15, heat-insulating tube 12, digital temperature reading device 16) is used in two modes: - without an installed measured part, - touching a steel rail guide 2 or one of the parts of the structure (base 1 or carriage 3) to determine the current temperature of the rail guide 2; - with the measured part installed, - touches the measured part to take into account its current temperature.

With the help of a digital temperature measuring device 16, the user determines the temperature (Tr) of the rail guide 2 and the temperature (Td) of the measured part, which are entered into the measuring computer device 5 by manual pressing (using the touch display b).

We denote the current size of the measured part by "I" (this size can be distorted due to different temperature elongations and contractions of the measured part and rail guide 2) and

Зо is determined according to the formula (1): r -I1442 (1) where: I1- the current length along the steel rail guide 2 between the ball heel 9 and the end of the micrometric head 4 in the zero position (set using steel gauges 7 at the beginning of work ); 12 - the current indicator of the micrometric head 4.

Also, the user manually (with the help of the touch display 6) selects in the counting-computer device 6 the appropriate group of parts materials according to the indicators of the temperature coefficients of linear expansions "Kd" (TKLR):

TKLR "5" - for glass, hard alloy, other similar materials;

TKLR "11.5" - for structural steel and similar iron alloys;

TKLR "15" - for stainless steels, other highly alloyed nickel alloys;

TKLR "17" - for brasses, bronzes and other copper alloys;

TKLR "23" - for duralumin, silumin and other aluminum alloys.

Manual input of the above two temperatures (Td and Tr) to the counting computer device 5 of the micrometric head 4 gives the following advantages:

Ensures the minimum cost of a useful model without deterioration of absolutely all metrological indicators;

Allows the use of existing unified counter-computer devices ("IpieiPidepi" and "Tabriei" (| or similar) instead of developing very expensive special counter-computer devices with two-way wireless communication and special software;

Allows the use of existing budget digital contact thermometers instead of developing very expensive special digital thermometers with two-way communication and special

software;

Provides personal control by the user of current temperature conditions during precision measurements;

Significantly speeds up and simplifies the preparation and production of the budget innovative utility model "Sliding Micrometer".

Counting-computer device 5 at the command of the user (with the help of the touch display b) calculates the actual measured dimensions of the part "Go" (adjusted to the normal temperature of 20 degrees Celsius) for these materials of the parts for the obtained current size "I" according to by the general formula (2) for mathematical compensation of temperature elongations for materials with different TKLR:

Ho-CC1-Kd(Td-20)411.5(T-20)) (2)

When measuring only steel parts with the useful model "Sliding Micrometer", the counting-computer device uses the simplified formula (3) for mathematical compensation of the temperature elongation of steel materials:

Go-C1-11.5 (Td-Tr). (3)

The ball heel 9 reduces the influence of non-coaxiality to the micrometric head 4 during step-by-step movement along the rail guide 2.

The adjustable support 10 provides support for the measured part (at the level of the ball heel 9 and the micrometric head 4) and moves in two directions:

Freely along the rail guide 2 due to the free rolling of the second rolling carriage Z along the rail guide 2;

Step-by-step in the vertical direction thanks to the step-by-step adjustable movement of the screw mechanism of precise feed.

The adjustable support 10 has a screw table (for adjusting the vertical position of the measured part) and is fixed on the second rolling carriage З (using double-sided tape, glue, a small magnet, mechanical fastening).

The tripod 11 is designed to hold the elongated heat-insulating tube 12 in the universal modification of the utility model in a given position. The extended heat-insulating tube 12 should slide freely in the hole on the tripod console 11 for gravitational pressure on the measured part or rail guide 2 when measuring their temperatures.

The tripod 11 can be attached to the base 1 by mechanical fastening in holes or by magnetic fastening on a magnetic base (similar to magnetic tripods of the ShM type (11).

In a simplified modification of the useful model (for steel measured parts), using a short heat-insulating tube 12, there is no need to use a tripod 11.

The useful model "Sliding Micrometer" is used as follows (for a simplified modification with the measurement of steel parts): 1) Includes a counter-computer device 5 and a digital temperature counter

From device 16; 2) Evaluate the length of the measured part for choosing the standard measure 7;

C) Adjust and fix the position of the first rolling carriage З with a ball heel 9 using the appropriate measuring device 7; 4) The fixed position of the ball heel 9 is memorized in the counter-computer device 5 by pressing the touch display 6; 5) Adjust the position of the tripod 11 for reliable contact with the heat-conducting tip 13 of the rail guide 2 (perhaps - the temperature of the base 1 or the second carriage 3); 6) Install the heat-conducting tip 13 with the temperature sensor 8 on the rail guide 2 and monitor the temperature change on the digital temperature measuring device 16; 7) Wait until the end of the temperature change and read the stable temperature "Tr" of rail guide 2; 8) Enter the value of the current temperature "Tr" of the rail guide 2 to the counting-computer device 5 by clicking on the touch display 6; 9) Select the TKLR of the material of the measured part by sorting through the options in the counting-computer device when pressing the touch display 6; 10) Adjust tripod 11 for the measured part; 11) Set the adjustable support 10 under the measured part; 12) Install the measured part between the ball heel 9 and the micrometric head 4 and rest the measured part on the adjustable support 10; 13) Install the heat-conducting tip 13 with the temperature sensor 8 on the measured part and monitor the temperature change of the measured part on the digital temperature measuring device 16; 14) Wait until the end of the temperature change and read the stable temperature "Td" of the measured part; 15) Enter the value of the current temperature of the measured part "Td" to the counter-computer device 5 by clicking on the touch display 6; 16) Clamp the measured part by turning the ratchet (or friction) of the micrometric head 4;

17) The current movement of the micrometric head 4 is read on the touch display 6 and fed to the counter-computer device 5 to take into account the initial position of the ball heel 9; 18) Automatic counter-computer device 5 calculates the current size of the measured part "I" and displays it on the touch display 6; 19) Transfer the counter-computer device 5 (by pressing the touch display) to the mode of mathematical compensation of temperature elongations-shortenings of the measured part and rail guide 2; 20) Automatically calculate according to the formula (2) or (3) with a counting-computer device 5 the reliable size of "Go" of the measured part under normal conditions (20 degrees Celsius for the measured part and useful model); 21) The reliable size of the measured part "I o" is recorded and archived in the counting computer device 6; 22) Transmit from the measuring computer device 5 to the outside (if necessary) via wireless communication to an external PC the reliable size "I o" of the measured part; 23) Remove the heat-conducting tip 13 with the temperature sensor 8 from the measured part; 24) Remove the measuring rod of the micrometric head 4 from the measured part; 25) Remove the measured part from support 10; 26) Repeat the transitions of paragraphs 8...21 when measuring parts of the same type; 27) Repeat the transitions of paragraphs 2....22 when measuring different types of parts; 28) Manually or automatically turn off the counting-computer device 5 and the temperature counting device (in the absence of measurements of length and temperature within 20...60 minutes); 29) Repeat the transitions of paragraphs 1...24 in new series after turning off the counters and the beginning of the working day.

The useful model "Sliding micrometer" does not require additional and special knowledge from the user and is used in the usual way.

A comparative analysis of the useful model "Sliding Micrometer" with a set of micrometers of the "570-302" series from the world's leading manufacturer of geometric gauges was carried out.

From the Japanese firm "Miishiuo" |(2I, see Table 2.

Table 2

Useful model and 1. tki: p sy (Japan) (2) sliding 0...25,25...50, 50...75, 75...100, 100...125, 125... 150, 150...175,

Measurement range, mm 0. 450 175...200, 200...225,225...250, ' What 250...275, 275...300, 300...325, 325...350, 350 ...375, 375...400, 400...425, 425...450 measurements 0...450 mm of measurement range 0...450 mm expansion of parts micrometer expansion of parts, degrees Celsius degrees Celsius

НЕ из иййнини: НШЕСЛНИ НИ ЗИМ in the range of 0...450 mm, μm and

EE under the NINS-LINES OF THE LAST LINES - PINNNNYA. so 6.7 100 set of micrometers, 90

The conducted analysis confirmed the possibility and expediency of manufacturing a useful "Sliding Micrometer" model, which significantly expands the metrological capabilities of micrometers.

The useful model "Sliding micrometer" provides significantly better indicators of geometric measurements of precision parts at workshop temperatures of 0...50 degrees Celsius.

Sources of information: 1. Catalog "MICROTECH" No. 570OA 2. Satai!od "Mishowo-2020"

Z. Saiaiod "Zuimas-2020" 4. Saiaiod "Ziaten-2020" 5. Saiaiod "Titov-2020" 6. Raiep 5 Mo 285684 "Sayireg dade" 7. Raiep 5 Mo 305963 "Misgoteiseg dade" 8. Raiepi O5 Mo Z 84771 "Mistoteiyeg dade" 9. Raiepi O5 Mo 1323707 "Mistoteiye!" 10. Raieps 05 Mo 2625745 "Ocivide tisgoteieg" 11. Raiep 5 Me 3276131 "I ipeg teazippd demise..." 12. Raiep 05 Mo 3996669 "M/ide hapde demise..." 13. Patent OA Mo 131773 "Calibration stand indicators 4.0" 14. Patent OA Mo 124020 "Micrometer "Mistoteieg 4.0" 15. Patent OA Mo 99686 "Computer micrometer".

Claims (1)

USEFUL MODEL FORMULA Sliding micrometer, which consists of a base and a rail guide with two rolling carriages, a micrometric head together with a counting-computer device and a touch display, a set of measuring measures, a temperature sensor, which is distinguished by the fact that a ball is installed on the first rolling carriage heel, an adjustable support is placed on the second rolling carriage, a tripod and a heat-insulating tube are installed on the base together with a temperature sensor Z0, built into a heat-conducting magnet tip with thermal paste and connected via a wire to a digital temperature reading device.