CN110238787A - Impact wrench screws angle, the detection of torque, reading and control method - Google Patents
Impact wrench screws angle, the detection of torque, reading and control method Download PDFInfo
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- CN110238787A CN110238787A CN201910653404.3A CN201910653404A CN110238787A CN 110238787 A CN110238787 A CN 110238787A CN 201910653404 A CN201910653404 A CN 201910653404A CN 110238787 A CN110238787 A CN 110238787A
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- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 23
- 230000035939 shock Effects 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000003116 impacting effect Effects 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000009527 percussion Methods 0.000 abstract 1
- 238000012795 verification Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
- B25B23/1475—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact wrenches or screwdrivers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
On impact wrench output shaft, equipped with the detection device for detecting output shaft direction of rotation, rotating angle, is installed in active impact structure shell vertical, detect the detection device of active impact structure percussion action.To screw angle as when tightening stop condition, in the quiet rotation angle for tightening rotation direction for tightening stage accumulation of turning round as A, the every Secondary Shocks of output shaft after impact starts screw angle as Δ α1~Δ αn, after output shaft is impacted it is counter shake inverse screw angle as Δ β1~Δ βn, using the tight angle of wheel as An, by formula: An=A+ Δ α1+…Δαn‑Δβ1‑…ΔβnIt calculates, screws angle as B, in A for defaultnStop spanner when=B and screws movement；When to screw torque as stop condition, the tight angle A of wheel of a certain torque demand is had reached after verifyingnWhen, the Δ α of corresponding n-th impactnAngle, the single-impact equal to pre-calibration setting screw angle Δ αn1When, stop spanner and screw movement, torque at this time is the tight angle A of wheelnCorresponding torque value when verification.Add angle as stop condition using the circle number for unscrewing direction accumulated when unscrewing.
Description
Technical field
The present invention relates to impact type impact wrench determine torque, surely screw angle output accurate control field, more particularly to
Numerical control determines torque, screws the structure of angle impacts spanner surely and screws angle, the detection of torque, reading and control method.
Background technique
Be widely used in various production lines and equipment manufacture it is various types of determine torque impact wrench, for improve assembly
Quality, often to the torque of Screw assembly, screw angle and clearly require, especially high-end manufacture field requires more tight
Lattice.So a large amount of all types of impact wrenches determined torque, screw angle surely are largely used in above-mentioned field, but impact wrench
In most cheap, simplest conventional impact type impact wrench because technically cannot achieve at present and accurately reliably determine torque,
Angle is screwed there are no legal, can not be used instead in above-mentioned field.Many enterprise individuals are engaged in this respect both at home and abroad for many years
Research, be born many patents, such as 201820325496.3 patent of application number, and what is used is mainly with cycle
Determine the technical solution of torque conditions；For another example 201721468062.0 patent of application number, the mechanical ratchet wheel used determine torque scheme；
And 00805071.6 patent of application number, single angular sensor is installed using the active part in beater mechanism, to
Record, control spanner always screw the patent of angle, the disadvantage is that angular sensor is installed on the active part of beater mechanism,
It cannot succinctly, really reflect the rotation angle of output shaft side, and torque cannot be determined；In conclusion not reliable so far,
Simple and easy, the impact wrench torsion measurement and control method that is easily achieved is, which is because, impingement impact wrench, is logical
Prime mover is crossed through retarder, drives the active part of beater mechanism, then engagement through dental inlay drives secondary part (Slave Block, defeated
Shaft, sleeve), the rotation hitting part of active part can produce the output shaft of secondary part after the quiet torque more than spanner
Raw intermittent rotation strike, rotation impulsive motion repeatedly screws nut finally in cycles, but finally screw torque
It is superposition of the active part to the repeat impact torque of secondary part output shaft, it is contemplated that axial compressive force between workpiece and nut
The influence of the moment of resistance (being substantially exactly to assemble torque) of generation, it can increase with screwing, while different sleeve and nut/
The combination of screw rod has a variety of different moments of inertia, and process is sufficiently complex, so single torque sensor and any point
The torque control methods such as grade control prime mover revolving speed, active block number of shocks, attack time control, all cannot be true, accurate
Accomplish the torque definite value of impact wrench, screw the output of angle surely.
Summary of the invention
To solve the problems, such as that the torque of determining to screw of impact type impact wrench exports, present invention use is rotated in certain certain value is rushed
It hits under power, a certain bolt or nut fastening draw wrong conclusions by false analogy and generate the principle for screwing angle of definite value, will be not easy the bump of detection
Torque is converted to " effect " being easy after the impact of detection, i.e., what impact made the attached generation of bolt fastening screws angle, by screwing
Angle, reading and the detection for screwing angular speed realize that impact wrench output screws torque, screws angle and unscrew circle number, angle
Accurate control.
Impact wrench spanner is to realize that torque is exported with the definite value for screwing angle, first has to realize active block rotation speed
Definite value and stabilization, for obtain meet output torque requirement rotary inertia, be to be controlled by the following method, pulled in impact
The quiet torque output stage of hand, magnitude of angular velocity of the control circuit according to the rotation angle sensing equipment output installed on output shaft,
It is compared with preset value, and then controls alignment circuit output valve, prime mover revolving speed is adjusted, is allowed to and preset value phase
Deng；In the stage of impact wrench output impulsive torque, control circuit is then according to shock testing device output, two-scale sequences pulse
The time interval Δ t of signal, and rotation angle sensing equipment output screw angle delta α, by formula: angular speed=(180 °+Δ α)
÷ Δ t, the mean angular velocity value and preset value calculated in the time interval compares, and then controls alignment circuit output valve, right
Prime mover revolving speed is adjusted, and is allowed to equal with preset value.
To solve the problems, such as that impact type impact wrench determines torque output, it is to be controlled by the following method, detects, reads
Output shaft rotated by active part hit when, generation screw direction screw angle delta α, with strike it is continuous into
Row, existing n screw angle, and the single that strike generates every time screws angle delta α, hit with this time and enclose institute in this bolt fastening
The tightening torque T of formation shows an a pair of relationship to answer, the tight angle A of bolt wheel of entire screwing operationsn, also with n times
Accumulation strike is formed by superposition torque, shows one-to-one relationship, convenient in order to what is detected and read, takes single herein
It is Δ alpha parameter that strike, which screws angle, and calibrates and is stored in control circuit in advance, and the bolt or nut fasten attached, punching
It hits and screws angle/torque comparison values Δ δ and be compared, such as M20*40 bolt sets torque value as 650N.m, it is corresponding
Last impact screws angle check value are as follows: Δ δ=1.55 °, then when impact continues toWhen
It determining, the attached torque value that screws at this time of the M20*40 bolt fastening is 650N.m, similarly in the predetermined torque value for reaching needs,
Control circuit can turn off prime mover, stop the output of torque, to reach the mesh of impact type impact wrench torque definite value output
's.
To solve the problems, such as that the angle of determining to screw of impact type impact wrench exports, the present invention uses defeated by detecting, reading
Shaft screws the accumulative of angle in the quiet torsion output stage of spanner；And stage output shaft is screwed by detecting, reading every Secondary Shocks
Anti- vibration rebound when screwing angle accumulation and every Secondary Shocks angle, then carry out screwing the control of angle in the following manner:
To screw angle as when tightening stop condition, the rotation angle of stage accumulative tightening direction is tightened in quiet torsion
As A, the every Secondary Shocks of output shaft after impact starts screw angle as Δ α1~Δ αn, the anti-of direction is screwed by output shaft is inverse
Angle of shaking is as Δ β1~Δ βn, using the tight angle of wheel as An, by formula: An=A+ Δ α1+ΛΔαn-Δβ1-ΛΔβnIt calculates,
Angle is screwed as B, in A using defaultnWhen=B, control circuit stops spanner and screws movement.
When to prevent the bolt unscrewed from falling to unscrew stop condition, control method is as follows: in impact wrench
When unscrewing bolt, it is that impact unscrews state first, has stopped when impact unscrews, when being unscrewed into quiet torque, strike detection dress
After setting no pulse output, the angle sensing equipment of output shaft, when the angle value for unscrewing direction of output is equal with preset value, control
Circuit stops spanner unscrewing action.
Using impact wrench unscrew circle number, angle as stop condition when, control method is as follows: impact wrench rotation
Song Shi, the angle sensing equipment output of output shaft, it is accumulative unscrew direction unscrew circle number+unscrew several angle values=preset rotation
When loose ring number+unscrew several angle values, moment of torsion control circuit stops spanner unscrewing action.
The invention has the advantages that being read under the control of shock transducer by control circuit, it is arranged in output shaft
On angular transducer screw angular values, efficiently solve impact wrench repeat impact superposition torque, be not easy to detect and read
The problem of taking converts the measurement problem of impulsive torque on output shaft to the measurement that single-impact screws angle, not only solves
Impact wrench, screws the accurate control of torque, and solves the accurate control problem of the tight angle of bolt wheel, has expanded impact
The use scope of formula impact wrench.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is output shaft angle detection device of the invention, the axis side state diagram in rotary impact.
Fig. 2 is shock testing device, the detecting state figure in rotary impact.
When Fig. 3 is that active block and output shaft dental inlay structure are detached from, the state diagram of axis side.
When Fig. 4 is active block and the disengaging of output shaft dental inlay structure, shock testing device detecting state figure.
Fig. 5 is that output shaft is hit by active block, generates the schematic diagram that single strike screws angle delta α.
Fig. 6 is that single-impact screws angle delta α, the tight angle A of wheelnWith the one-to-one relationship schematic diagram for screwing torque.
Fig. 7 is the schematic block circuit diagram of the embodiment of the present invention.
Fig. 8 is the structure chart of the embodiment of the present invention.
1. output shaft in figure, 2. angle detection devices, 3. active blocks, 4. shock testing devices, 5. prime mover, 6. torques
Controller, 7. switches, 8. power sources, 9. electronic switches, 10. governors, 11 main springs, 12. speed changers, 14. output shafts are driven
Block anvil, 21. inductive disks, 31. active block dental inlay structure anvils.
Specific embodiment
In Fig. 1 and Fig. 2, on the output shaft 1 of well known impact wrench structure, it is coaxially installed with angle detection device 2
Inductive disks 21, for exporting rotation angle, the angular speed numerical value of secondary part output shaft, active block 3 outer radial hang down
Shock testing device 4 directly is installed, is hit with rotation and generates pulse signal, is screwed after movement starts in spanner, spanner initiative part
Point the output shaft 1 of secondary part is driven to rotate, exports quiet torque, angle detection device 2 export screw the accumulative circle number in direction with
Angle value gives torque controller 6.
In Fig. 3 and Fig. 4, when spanner reaches quiet torque output limit and switchs to rotary impact, active block dental inlay structure anvil
Platform 31 is detached from output shaft Slave Block anvil 14, and output shaft 1 and active part no longer synchronous rotary, active block 3 compress master backward
Spring 11, and trigger impact sensing device 4 in A point, providing signal makes 6 start recording of moment of torsion control circuit, as shown in Figure 5 this
Secondary Shocks, rotation angle value and magnitude of angular velocity, magnitude of angular velocity are in deceleration characteristic, are decremented to " 0 " to directional angular velocity value is screwed
When, the rotation angle value recorded at this time is that this time rotation strike generates, and impact screws angleHereafter the anti-shadow to be shaken
It rings, output shaft 1 generates the inverse rotation angle for screwing direction, and the angular speed exported from angle, angular speed detecting apparatus 2 is that " 0 " is opened
Begin, to before the pulse signal arrival of lower Secondary Shocks sensing device, the counter-rotating angle of record, as anti-vibration angle value Δ β.
In Fig. 6, with being carried out continuously for strike, existing n impact screws angle, the single-impact that strike generates every time
Angle Δ α (column figure vertical center line part) is screwed, hits to enclose to be formed by be superimposed in this bolt fastening screwing torque T with this timen, it is in
Reveal an a pair of relationship to answer, the tight angle A of bolt wheel of entire screwing operationsnAlso it is formed by with accumulation strike and is superimposed rotation
Tight torque Tn, show one-to-one relationship.
In Fig. 7, the speed stabilizing control process of impact wrench is, in the quiet torque output stage of impact wrench, control circuit 6
According to the magnitude of angular velocity that the rotation angle sensing equipment 2 installed on output shaft exports, compared with preset value, and then control
The revolving speed of prime mover 5 is adjusted in the output valve of alignment circuit 10, is allowed to equal with preset value；It exports and rushes in impact wrench
It hits the stage of torque, what control circuit 6 was then exported according to shock testing device 4, the time interval Δ of two-scale sequences pulse signal
T, and rotation angle sensing equipment output screw angle delta α, by formula: angular speed=(180 °+Δ α) ÷ Δ t, when calculating this
Between interval in mean angular velocity value and preset value compare, and then control alignment circuit 10 output valve, to the revolving speed of prime mover 5
It is adjusted, is allowed to equal with preset value.
In Fig. 7, the moment of torsion control process of determining of impact wrench is that the predetermined torque value first in torque controller 6 is pressed
After switch 7, electronic switch 9 is connected in 6 output signal of torque controller, and power source 8 is connected to prime mover 5 by governor, and original is dynamic
Machine 5 drives output shaft 1 by the dental inlay mechanism of speed changer 12 and active block 3, screws movement to bolt, and 6, moment of torsion control circuit
According to the angular velocity signal that angle detection device 2 exports, prime mover 5 is controlled by governor 10 and pacifies preset rotation speed rotation, in spanner
When reaching quiet torque output limit and switching to rotary impact, impact sensing device 4 provides signal, makes 6 start recording of torque controller,
The impact that angle detection device 2 exports screws angleAnd in memory, the bolt fastening is attached, impact screw angle/
The comparison values Δ δ of torque carries out logical comparison, meets condition after n times impactWhen, torque controller 6 is through electronics
Switch 9 disconnects power source 8, stops spanner and screws movement, bolt fastening at this time it is attached to screw torque i.e. equal with predetermined torque,
And this torque value is shown in torque display.
The angle control process of determining to screw of impact wrench is to preset the tight angle of wheel first in torque controller 6, press
After switch 7, electronic switch 9 is connected in 6 output signal of torque controller, and power source 8 is connected to prime mover 5 by governor 10, former
Motivation 5 drives output shaft 1 by the dental inlay mechanism of speed changer 12 and active block 3, screws movement, moment of torsion control circuit 6 to bolt
According to the angular velocity signal that angle detection device 2 exports, prime mover 5 is controlled by governor 10 and pacifies preset rotation speed rotation, torque
Controller 6 is just recorded when starting rotation, angle detection device 2 export it is continuous it is quiet screw angle A, impact records defeated after starting
The every Secondary Shocks of shaft screw angle as Δ α1~Δ αn, the anti-vibration angle in direction is screwed as Δ β using output shaft is inverse1~Δ βn,
Using the tight angle of wheel as An, by formula: An=A+ Δ α1+ΛΔαn-Δβ1-ΛΔβnIt calculates, screws angle for presetting in memory
Degree is used as B, carries out logical comparison in AnWhen=B, torque controller 6 disconnects power source 8 through electronic switch 9, stops spanner and screws
Movement, the tight angle of the attached wheel of bolt fastening at this time i.e. with it is default to screw angle equal, and shown in screwing angular display unit
Show that this screws angle value.
When impact wrench unscrews operation, to prevent the bolt unscrewed, nut from falling, following control is carried out:
When impact wrench unscrews, stop when impact unscrews, when being unscrewed into quiet torque, strike 4 no pulse of detection device output
Afterwards, the angle of output shaft, angular speed sensing device 2 export, unscrew direction angle value it is equal with preset value when, control circuit
6 stop spanner unscrewing action by electronic switch 9.
When impact wrench unscrews operation, to reach the requirement that control unscrews circle number and angle, following control is carried out:
When impact wrench unscrews, what the angle sensing equipment 2 of output shaft exported, it is accumulative unscrew direction unscrew circle number+unscrew several angles
Angle value is=preset to unscrew circle number+when unscrewing several angle values, and control circuit 6 stops spanner unscrewing action by electronic switch 9.
In the embodiment shown in fig. 8, power source 8 is 220V alternating current, coaxial to pacify on the output shaft 1 of impact wrench
Equipped with angle detection device 2, be radially vertically installed with shock testing device 4 in the rotation shaft side of active block 3, electronic switch 9 with
Governor 10 is installed in spanner handle base portion cavity, and prime mover 5 is series excitation type motor, with speed changer, crankshaft, main bullet
The elements such as spring, active block 3 form well known impact wrench transmission mechanism, and the circuit board of torque controller 6 is installed on spanner tail portion
In cavity, display and pre-set button are located at spanner tail end face, according to the controlling party above-mentioned for screwing torque and screwing angle
Method can be precisely controlled the torque that screws of impact wrench with angle is screwed.
Claims (8)
1. the bolt of impact wrench screws the detection of angle and torque, the mechanical rotary impact part of impact wrench, by actively
Part is formed with secondary part, and the rotation hitting part of active part, can be to secondary part after the quiet torque more than spanner
Output shaft generates intermittent strike, and the bolt of impingement spanner screws the testing agency of angle and torque, it is characterised in that:
On the outside of the rotation hitting part of active part, it is radially vertically installed with shock transducer, is hit with rotation and generates pulse signal；?
Secondary part output shaft be coaxially installed with detection rotation angle sensing device, measure secondary part output shaft direction of rotation,
Rotate angle, angular velocity of rotation numerical value.
2. screwing the read method of angle detection by the bolt of impact wrench described in claim 1, it is characterised in that: pulling
Hand screws after movement starts, and spanner active part drives the output shaft rotation of secondary part, exports quiet torque, rotates angle sensor
Device records the accumulative circle number and angle for screwing direction；When spanner reaches quiet torque output limit and switchs to rotary impact, impact
Sensor can give control circuit to issue pulse signal, and moment of torsion control circuit start recording is made this time to hit the direction that screws generated
Angle value, and the inverse anti-vibration angle value for screwing direction is recorded in the interval of two-scale sequences pulse signal.
3. detection, reading that each strike bolt of the impact wrench as described in claim 1,2 screws angle, anti-vibration angle
Method, it is characterised in that: when rotation strike starts, impact sensing device, which provides signal, makes control circuit start recording, records
Direction of rotation, angle value and the magnitude of angular velocity of output shaft angle sensing equipment output, wherein magnitude of angular velocity is in deceleration characteristic, to rotation
When tight directional angular velocity value is " 0 ", what the rotation angle value recorded at this time as this time rotation strike generated screws angle, hereafter
Due to the anti-influence shaken that is hit, output shaft generates the inverse rotation angle for screwing direction, from the angle that angle detection device exports speed
Degree is that " 0 " starts, to before the pulse signal arrival of next shock transducer, the reverse rotation angle of record, and as anti-vibration angle
Value.
4. the bolt of determining of the impact wrench as described in claim 1,2,3 screws angle control method, it is characterised in that: with
Angle is screwed as when tightening stop condition, in the quiet rotation angle for tightening the tightening direction that the stage adds up as A, impact starts
The every Secondary Shocks of output shaft afterwards screw angle as Δ α1~Δ αn, the anti-vibration angle in direction is screwed as Δ β using output shaft is inverse1
~Δ βn, using the tight angle of wheel as An, by formula: An=A+ Δ α1+ΛΔαn-Δβ1-ΛΔβnIt calculates, screws angle for default
As B, in AnWhen=B, moment of torsion control circuit stops spanner and screws movement.
5. the bolt of determining of the impact wrench as described in claim 1,2,3 screws torque control method, which is characterized in that control
Method is as follows: when to screw torque as stop condition, after verifying, have reached it is a certain screw it is complete corresponding to torque demand
Screw angle AnWhen, corresponding n-th impact screws angle delta αn, equal to the corresponding n-th of the torque of pre-calibration setting
When impact screws angle delta δ, moment of torsion control circuit stops spanner and screws movement.
6. the speed stabilizing control method of the active part by impact wrench described in claim 1, it is characterised in that: in impact wrench
Quiet torque output stage, control circuit is and pre- according to the direction of rotation of output shaft, the magnitude of angular velocity of angle sensing equipment output
If value compares, and then controls alignment circuit output valve, prime mover revolving speed is adjusted, is allowed to equal with preset value；?
Impact wrench exports the stage of impulsive torque, and control circuit is then according to shock testing device output, two-scale sequences pulse signal
Time interval Δ t, by formula: angular speed=(180 °+Δ α) ÷ Δ t calculates mean angular velocity in the time interval and pre-
If value comparison, and then alignment circuit output valve is controlled, prime mover revolving speed is adjusted, is allowed to equal with preset value.
7. impact wrench, to prevent what the bolt unscrewed from falling to unscrew method for controlling stopping, it is characterised in that: impacting
When formula spanner unscrews bolt, it is that impact unscrews state first, has stopped when impact unscrews, when being unscrewed into quiet torque, strike
After the output of detection device no pulse, the angle value for unscrewing direction of the angle sensing equipment of output shaft, output is equal with preset value
When, control circuit stops spanner unscrewing action.
8. the method for controlling stopping for unscrewing circle number, angle of impact wrench, it is characterised in that: when impact wrench unscrews,
The angle sensing equipment output of output shaft, the accumulative several angle values of circle number+unscrew=preset of unscrewing for unscrewing direction unscrew circle
When count+unscrewing several angle values, moment of torsion control circuit stops spanner unscrewing action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653404.3A CN110238787A (en) | 2019-07-19 | 2019-07-19 | Impact wrench screws angle, the detection of torque, reading and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653404.3A CN110238787A (en) | 2019-07-19 | 2019-07-19 | Impact wrench screws angle, the detection of torque, reading and control method |
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| CN110238787A true CN110238787A (en) | 2019-09-17 |
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| CN201910653404.3A Pending CN110238787A (en) | 2019-07-19 | 2019-07-19 | Impact wrench screws angle, the detection of torque, reading and control method |
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| CN (1) | CN110238787A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110653745A (en) * | 2019-10-10 | 2020-01-07 | 贵州电网有限责任公司 | Electric remote visual impact wrench and operation method thereof |
| CN111843902A (en) * | 2020-06-12 | 2020-10-30 | 河南牛帕力学工程研究院 | Calibration method of impact wrench |
| CN112936156A (en) * | 2020-04-14 | 2021-06-11 | 河南牛帕力学工程研究院 | A kind of spanner |
| CN113021243A (en) * | 2020-04-14 | 2021-06-25 | 河南牛帕力学工程研究院 | Calibration method of fixed-torque impact wrench |
| CN113021242A (en) * | 2020-04-14 | 2021-06-25 | 河南牛帕力学工程研究院 | Constant torque output control method of constant torque impact wrench |
| CN113375859A (en) * | 2021-06-30 | 2021-09-10 | 中国铁路郑州局集团有限公司科学技术研究所 | Online calibration method and device for controllable torque impact wrench |
| CN113390543A (en) * | 2021-06-30 | 2021-09-14 | 中国铁路郑州局集团有限公司科学技术研究所 | Online torque measurement method and device for controllable torque impact wrench |
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| WO2019008858A1 (en) * | 2017-07-04 | 2019-01-10 | パナソニックＩｐマネジメント株式会社 | Rotary impact tool |
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