CN104848977A - Manufacturing method of sensor for measuring parachute canopy dynamic stress - Google Patents
Manufacturing method of sensor for measuring parachute canopy dynamic stress Download PDFInfo
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- CN104848977A CN104848977A CN201510191153.3A CN201510191153A CN104848977A CN 104848977 A CN104848977 A CN 104848977A CN 201510191153 A CN201510191153 A CN 201510191153A CN 104848977 A CN104848977 A CN 104848977A
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- foil gauge
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Abstract
The present invention relates to a manufacturing method of a sensor for measuring parachute canopy dynamic stress, belongs to the technical field of sensors and concretely relates to a manufacturing technique of sensors of parachute canopies. The sensor manufactured by the method provided by the present invention is suitable for the parachute canopies, and is used for measuring stress situations in flexible canopy static/dynamic processes, thereby solving the stress measuring problem of large-deformation flexible fabrics in deformation processes.
Description
Technical field
The present invention relates to a kind of sensor production method for measuring bell dynamic stress, belonging to sensor technical field, be specifically related to a kind of sensor manufacturing process for bell.
Background technology
At present, in the stress measurement and Mechanical Behavior Analysis of bell, main research method is theoretical analysis and simulation calculation both at home and abroad.But, due to the theory of parachute dynamic stress measurement and analytical approach also immature, therefore the current simulation calculation based on methods such as finite elements can only be estimated by force information.A technical barrier to the measurement of bell dynamic stress situation.
Current domestic and international existing method can only accomplish static state or half dynamic measurement and qualitative analysis.There is not yet the correlative study achievement of kinetic measurement to bell stressing conditions in the course of the work and quantitative analysis method.Its where the shoe pinches is mainly the sensor not also being applicable to measure bell at present completely.
Because parachute is in opening process, can produce very large deformation and violent shake, maximum parachute-opening is crossed and is loaded in instantaneous completing, and current existing sensor is not all suitable for such working environment.
Summary of the invention
The object of the present invention is to provide a kind of bell that is applicable to by the manufacture craft of force measuring sensors.
The object of the invention is to be achieved through the following technical solutions.
The present invention is a kind of for measuring the stressed sensor production method of bell, and step is:
Step 1, preparation omega steel body starting material;
Step 2, modifier treatment is carried out to omega steel body starting material;
Step 3, grinding process is carried out to omega steel body starting material;
Step 4, omega steel body starting material to be carried out to linear cutter shaping;
Step 5, finishing is carried out to omega steel body, specifically comprise sanding and polishing, chamfering, three sub-steps of holing;
Step 6, omega steel body to be detected, and chooses foil gauge and its pairing, now form foil gauge medium, each medium produce one independently ambulatory stress test parameter have noninterchangeability;
Step 7, foil gauge medium to be cleaned;
Step 8, by gluing on the outside surface of foil gauge medium and by strain gauge adhesion on the outside surface of medium, coating technique determines measuring accuracy and the sensitivity of sensor;
Step 9, to the upper pin of foil gauge welding, the long 1.5m of pin is for the connection on bell and between measured node;
Step 10, on the outside surface of foil gauge, gluing is protected, and obtains omega sensor, and namely this omega sensor comprises foil gauge medium, foil gauge, pin and glue.Being coated with the object of protecting glue is make sensor the folding of parachute, pressurize, go out sensor in umbrella, opening process and do not get loose.
Further, in step 1, the material of omega steel body is 3Cr13, and GB code name is GB/T1220-1992, belongs to martensite type stainless steel.
Further, the main chemical compositions of described 3Cr13 is as follows:
Further, the Main Mechanical of described 3Cr13 is as follows:
Tensile strength sigma b (MPa) Q-tempering, >=735
Offset yield strong σ 0.2 (MPa) Q-tempering, >=540
Length growth rate δ 5 (%) Q-tempering, >=12
Reduction of area ψ (%) Q-tempering, >=40
Impact energy Ak v (J) Q-tempering, >=24
Hardness is annealed ,≤235HB; Q-tempering, >=217HB
Further, in step 2, modifier treatment is quenched in 1000-1050 DEG C of temperature range to 3Cr13 rapidoprint, and through lonneal after quenching, the stainless hardness of the 3Cr13 after modified reaches HRC28 ~ 38.
Further, the grinding process described in step 3 uses surface grinding machine with horizontal spindle and rectangular table to carry out two-sided polishing to rapidoprint, by material thickness polishing to 0.5mm thickness.
Further, the linear cutter in step 4 is shaping be by grinding process after stainless steel starting material cut out omega steel body through spark cutting machine.
Further, in step 5, sanding and polishing uses electric grinding instrument by artificial by omega steel external surface sanding and polishing.
Further, the chamfering in step 5 uses electric mill to carry out chamfered to four angles bottom omega steel body.
Further, the boring in step 5 uses bench drill respectively to bore three equidistant apertures to omega steel body both sides footing, and the diameter in hole is 1.2mm.
Further, it is use vernier caliper to measure the length of foil gauge medium, width, thickness, diameter that foil gauge medium in step 6 detects, and uses dynamometer to measure elastic force.
Further, the cleaning fluid used in step 7 is industrial anhydrous alcohol, and the instrument of use is degreasing cotton swab.
Further, the glue used in step 8 is one-component industry 401 glue, uses bamboo let as the instrument of strain gauge adhesion, uses cylinder metal rod as the fixing tool of foil gauge medium.
Further, in step 9 pad at the intersection outside surface of foil gauge medium footing and circular arc.
Further, in step 10, protection is coated with silica gel on foil gauge surface and solder joint place to protect.
Beneficial effect
Step 1 of the present invention) middle preparation omega steel body starting material, because sensor is operationally contained in the outside surface of parachute, after bag umbrella completes, load umbrella cabin together with parachute, have long storage, select stainless object to be do not change surface quality within storage period;
The object of the modifier treatment in step 2 of the present invention is that the toughness increasing omega steel body improves comprehensive mechanical performance, and sensor operationally constantly can stretch fast together with bell needs high-quality toughness;
Step 3 of the present invention) in the reason of grinding process be: sensor is contained on canopy, parachute high speed parachute-opening during work, and the side of canopy and sensor can friction mutually at a high speed, if do not carry out burnishing part to comprehend destruction parachute construction;
Step 4 of the present invention) in the reason of Linear cut be: sensor is contained on canopy, parachute in the course of the work canopy due to stressed and extended, sensor openings 1.8mm work elongation is not more than 0.2mm, the thickness that omega steel body is cut into 1mm is to keep opening elasticity consistent with the length growth rate of canopy, excessive or too small thickness all will make kinetic measurement complete, and Linear cut ensures that high-precision a kind of machine adds technological means;
Step 5 of the present invention) in finishing specifically comprise sanding and polishing, chamfering, three sub-steps of holing; Sensor is contained on canopy, parachute high speed parachute-opening during work, and the side of canopy and sensor can friction mutually at a high speed, if do not carry out sanding and polishing, chamfered can destroy parachute construction, and the object of boring is in through fixing suture;
Step 6 of the present invention) in choose foil gauge and its pairing, now form foil gauge medium, each medium produce one independently ambulatory stress test parameter have noninterchangeability;
Step 7 of the present invention) foil gauge medium is cleaned, wash machine processes the greasy dirt stayed, and ensures the firm of viscose glue and reliability;
Step 8 of the present invention) in by gluing on the outside surface of foil gauge medium and by strain gauge adhesion on the outside surface of medium, coating technique determines measuring accuracy and the sensitivity of sensor, the outside surface that foil gauge is attached to omega steel body forms sensor, adopts the object of coating technique to be to make in whole measuring process steel physical efficiency the deformation process of canopy is fully transmitted to foil gauge completes dynamically accurately measure;
Walk of the present invention rapid 9) be for the connection on bell between measured node to the object of the upper pin of welding, the long 1.5m of pin, only so adopt other connected modes such as welding instead of screw to be to reduce volume and smooth surface;
Step 10 of the present invention) in obtain omega sensor, namely this omega sensor comprises foil gauge medium, foil gauge, pin and glue, and being coated with the object of protecting glue is make sensor the folding of parachute, pressurize, go out in umbrella, opening process and do not get loose.The parachute-opening overload of parachute is maximum reaches 20g, and the pressure that will add 5000kg during bag umbrella is coated with protecting glue and can guarantees that foil gauge does not come off;
The sensor that the present invention prepares can adapt to bell, to flexible canopy quiet/dynamic process in stressing conditions measure, thus solve the stress measurement problem of large deformation flexible fabric deformation process.
Accompanying drawing explanation
Fig. 1 is the structural representation of foil gauge medium of the present invention;
Fig. 2 is strain gauge adhesion process schematic provided by the invention; In figure, the implication representated by label is: 1-foil gauge medium, 2-foil gauge solder joint, 3-foil gauge medium small hole at bottom part, 4-cylindrical metal stilt, 5-foil resistance foil gauge.
Embodiment
Be made as example with single-sensor, by reference to the accompanying drawings, embodiments of the present invention are specifically described as follows.Special instruction, concrete embodiment described herein in order to explain the present invention, but is not intended to limit the present invention.
Embodiment
The method for making of foil gauge medium.Its concrete steps are as follows:
Step one: get the raw materials ready the stage, the material chosen of getting the raw materials ready of foil gauge medium is 3Cr13, and GB code name is GB/T1220-1992, belongs to martensite type stainless steel.This stainless steel material machining property is good, and after thermal treatment (Q-tempering), have excellent decay resistance, polishability, higher intensity and wearing quality, high load capacity is born in suitable manufacture, high abrasion and the medium under corrosive medium effect.After modifier treatment, hardness is in the 3Cr13 materials processing better performances of about HRC30, reaches good surface quality.And the part that hardness processes when being greater than HRC30, although surface quality is better, cutter is easy to wear.So, after material enters factory, first carry out modifier treatment hardness and reach HRC25 ~ 38, and then carry out cut.Getting the raw materials ready as the direct stainless steel nahlock bought in steel market of foil gauge medium needed for present embodiment.
Step 2: raw-material modifier treatment, modified is quenching and the Thermal Synthetic treatment process of high tempering.3Cr13 stainless steel material has good hot-working character, needs controlled working temperature during hot-working, needs slow cooling and annealing in time after hot-working.Need in 1000-1050 DEG C of temperature range Quenching Treatment, again through lonneal after quenching.The stainless hardness of 3Cr13 after modified reaches the requirement that HRC28 ~ 38. 3Cr13 stainless steel starting material now can reach the processing of sensor medium.
Step 3: raw-material grinding process.3Cr13 stainless steel starting material after modifier treatment can carry out processing.3Cr13 stainless steel nahlock is positioned on grinding machine, by grinding machine, two-sided polishing is carried out to 3Cr13 stainless steel nahlock, make it reach thickness required for Fig. 1.
Step 4: the linear cutter of omega steel body is shaping, is fixed on the work top of electric spark linear cutting machine by the 3Cr13 stainless steel nahlock clamping of having polished, puts on the wire of wire.The control computer of electric spark linear cutting machine is drawn the profile shown in foil gauge medium manuscript shown in Fig. 1, is the wire distance of wire.After starting power supply, linear cutter can be completed voluntarily.
Step 5: the finishing of omega steel body, due to the restriction of Machining Technology with WEDM, the foil gauge medium cut down also does not reach request for utilization in the technical indicator such as profile, roughness.Therefore finishing must be carried out to it.Three steps such as sanding and polishing, chamfering, boring are comprised to the finishing of omega steel body.Because omega steel body size is now less, thinner thickness, has been not suitable for processing further on lathe.So the finishing step such as sanding and polishing, chamfering, boring of omega steel body has come by artificial.
The grinding machine processed 3Cr13 stainless steel nahlock in step 3 is surface grinding machine with horizontal spindle and rectangular table, and model is M7130B, and its work top is 300mm*1000mm.
The cutting off machine that in step 4, machining uses is electric spark linear cutting machine, and model is DK7755.
Grinding and polishing process described in step 5, adopts manual type, to the polishing of foil gauge media surface and polishing, so that roughness reaches requirement.
Chamfering described in step 5 is due to flexible material cracky, and four drift angles bottom foil gauge medium are carried out chamfered, to avoid scratching flexible material when testing, affects measurement result.
Hole described in step 5, be that bottom foil gauge medium, three holes are respectively bored on both sides for the ease of foil gauge medium being fixed on the procedure that flexible fabric does, the diameter in each hole is 1.2mm.
Detecting described in step 6 is use vernier caliper (precision 0.02mm) to measure the length of foil gauge medium, width, thickness, diameter, uses dynamometer to measure elastic force.
As shown in Figure 2, the method for attaching of foil gauge, the concrete steps of its method for making are as follows:
Step one: the cleaning of foil gauge medium, the thin oil film remained for guaranty money's metal surface can not affect the stickup of foil gauge, first adopts clean-out system to clean foil gauge outside surface, adopts cotton swab as the instrument of cleaning.
Step 2: the gluing of foil gauge medium, through cleaning foil gauge medium through natural air drying, carry out gluing operation in outside surface chosen position; Be positioned over by foil gauge in fixing glue, foil gauge is toggled it to the position of specifying by use instrument; Press uniformly on foil gauge surface, foil gauge and foil gauge medium are fitted tightly.
Step 3: the welding of foil gauge pin, for ensureing the fastness of pin, is selected in the footing of foil gauge medium and circular junction by the pin pad of foil gauge.
Step 4: the protection of foil gauge and solder joint, smears silica gel on foil gauge surface and solder joint place and protects it.
Claims (10)
1., for measuring the stressed sensor production method of bell, it is characterized in that step is:
Step 1, preparation omega steel body starting material, and choose foil gauge;
Step 2, modifier treatment is carried out to omega steel body starting material;
Step 3, grinding process is carried out to omega steel body starting material;
Step 4, omega steel body starting material to be carried out to linear cutter shaping;
Step 5, finishing is carried out to omega steel body, specifically comprise sanding and polishing, chamfering, three sub-steps of holing;
Step 6, omega steel body to be detected, and chooses foil gauge and its pairing, now form foil gauge medium, each medium produce one independently ambulatory stress test parameter have noninterchangeability;
Step 7, foil gauge medium to be cleaned;
Step 8, by gluing on the outside surface of foil gauge medium and by strain gauge adhesion on the outside surface of foil gauge medium, coating technique determines measuring accuracy and the sensitivity of sensor;
Step 9, to the upper pin of foil gauge welding, the long 1.5m of pin is for the connection on bell and between measured node;
Step 10, on the outside surface of foil gauge, gluing is protected, and the object being coated with protecting glue makes sensor the folding of parachute, pressurizes, goes out sensor in umbrella, opening process and do not get loose.
2. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: in step 1, the material of omega steel body is 3Cr13, GB code name is GB/T1220-1992, belongs to martensite type stainless steel.
3. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: in step 2, modifier treatment is quenched in 1000-1050 DEG C of temperature range to 3Cr13 rapidoprint, through lonneal after quenching, the stainless hardness of the 3Cr13 after modified reaches HRC28 ~ 38.
4. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: the grinding process described in step 3 uses surface grinding machine with horizontal spindle and rectangular table to carry out two-sided polishing to rapidoprint, by material thickness polishing to 0.5mm thickness.
5. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: the linear cutter in step 4 is shaping be by grinding process after stainless steel starting material cut out omega steel body through spark cutting machine.
6. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: in step 5, sanding and polishing uses electric grinding instrument by artificial by omega steel external surface sanding and polishing; Chamfering in step 5 uses electric mill to carry out chamfered to four angles bottom omega steel body; Boring in step 5 uses bench drill respectively to bore three equidistant apertures to omega steel body both sides footing, and the diameter in hole is 1.2mm.
7. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: the omega steel health check-up in step 6 is surveyed and chosen foil gauge and its pairing, now form foil gauge medium, each medium produce one independently ambulatory stress test parameter have noninterchangeability.
8. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: the cleaning fluid used in step 7 is industrial anhydrous alcohol, and the instrument of use is degreasing cotton swab.
9. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: the glue used in step 8 is one-component industry 401 glue, use bamboo let as the instrument of strain gauge adhesion, use cylinder metal rod as the fixing tool of foil gauge medium.
10. according to claim 1 a kind of for measuring the stressed sensor production method of bell, it is characterized in that: in step 9, pad is at the intersection outside surface of foil gauge medium footing and circular arc, and the long 1.5m of pin is for the connection on bell and between measured node; In step 10, protection is coated with silica gel on foil gauge surface and solder joint place to protect, and being coated with the object of protecting glue is make sensor the folding of parachute, pressurize, go out sensor in umbrella, opening process and do not get loose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510191153.3A CN104848977A (en) | 2015-04-21 | 2015-04-21 | Manufacturing method of sensor for measuring parachute canopy dynamic stress |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510191153.3A CN104848977A (en) | 2015-04-21 | 2015-04-21 | Manufacturing method of sensor for measuring parachute canopy dynamic stress |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107145A (en) * | 2006-10-24 | 2008-05-08 | Hitachi Cable Ltd | Impact detection sensor and its manufacturing method |
| CN103344483A (en) * | 2013-06-09 | 2013-10-09 | 东南大学 | Strain sensor for measuring flexible fabric stress effect |
| CN203287244U (en) * | 2013-06-09 | 2013-11-13 | 东南大学 | Strain transducer for measuring stress effect of soft fabric |
| CN103606565A (en) * | 2013-11-27 | 2014-02-26 | 苏州科技学院 | Technology for manufacturing sensitive element of pressure sensor |
-
2015
- 2015-04-21 CN CN201510191153.3A patent/CN104848977A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008107145A (en) * | 2006-10-24 | 2008-05-08 | Hitachi Cable Ltd | Impact detection sensor and its manufacturing method |
| CN103344483A (en) * | 2013-06-09 | 2013-10-09 | 东南大学 | Strain sensor for measuring flexible fabric stress effect |
| CN203287244U (en) * | 2013-06-09 | 2013-11-13 | 东南大学 | Strain transducer for measuring stress effect of soft fabric |
| CN103606565A (en) * | 2013-11-27 | 2014-02-26 | 苏州科技学院 | Technology for manufacturing sensitive element of pressure sensor |
Non-Patent Citations (1)
| Title |
|---|
| 中航电测仪器股份有限公司: "不锈钢全密封高精度柱式传感器的研制", 《称重科技》 * |
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Application publication date: 20150819 |