CN109175988A - A kind of fastener is adjusted torsion device for screwing up and tightens force control method - Google Patents
A kind of fastener is adjusted torsion device for screwing up and tightens force control method Download PDFInfo
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- CN109175988A CN109175988A CN201811294658.2A CN201811294658A CN109175988A CN 109175988 A CN109175988 A CN 109175988A CN 201811294658 A CN201811294658 A CN 201811294658A CN 109175988 A CN109175988 A CN 109175988A
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- 238000013461 design Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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Abstract
The invention discloses a kind of fasteners, and torsion device for screwing up is adjusted, and including chassis, the cylinder being mounted on chassis, slide rail, PLC, slide rail is connect by sliding bearing with mobile bracket, and mobile bracket is connect by connecting bracket with cylinder;Mobile bracket is equipped with tightening mechanism, and tightening mechanism is connect by torque force limiting device with tightening tool;Tightening mechanism is motor or air motor, and the gas circuit of air motor connection is equipped with pressure regulator valve;Chassis lower part is equipped with location switch and tightens switch;Torque force limiting device is steel-ball type torque force limiting device, and steel-ball type torque force limiting device is equipped with microswitch, and microswitch is connect with PLC.The present invention provides that a kind of electrical control is simple, it is adjustable to tighten torsion, structure is simple, torsion device for screwing up is adjusted in high reliablity, low cost fastener.
Description
Technical field
The present invention relates to engine assembly fields, in particular to torsion, which is adjusted, to a kind of fastener tightens dress
It sets.
Background technique
The assembly work of state's intrinsic motivation is almost manually completed, artificial when tightening screw, the not only work of worker
Amount is big, screwing force be also it is out of contior, product can loosen when screwing force is too small, and product is damaged when excessive, the quality of product
It is not very stable.
Machining is tightened using what common single screw tightened sleeve by some producers, but is frequently not while tightening, because
When assembling end cover of engine, several screws require be tighten simultaneously, and several screws to tighten force request consistent, if number
The power that screw cannot be tightened or be tightened simultaneously is not of uniform size, influences properties of product.
When assembling engine and auto parts and components, the most typical, important as bolt, screw are tight in connection method
Gu and torque is then the important guarantee of bolt fastening quality.Therefore some producers start to research and develop some automatic tightening fasteners
Assembly equipment, to achieve the purpose that improve assembling quality, but these equipment are complicated in order to reach accurate torque structure, cost compared with
Height, or using pneumatically tightening, actual screwing force is not consistent with the lashing force of design requirement.
Currently, we retrieve the open source literature of one or more fasteners automatic screwing down apparatus, such as:
1. Chinese Patent Application No. CN200820164166.7, publication date on July 29th, 2009, this application discloses one
Kind screw tightening apparatus, it includes the rack (7) equipped with pneumatic element, electrical component and programmable controller, the rack
(7) it is additionally provided with the fixture (5) of fixed workpiece (6) on panel, stores magazine (15), electric control box (4) and the feed of screw
Device is equipped with screw sequence indicator light (3) on the electric control box (4), and connect with programmable controller conducting wire;Institute
That states walks knife system equipped with pneumatic screw driver (2), and the pneumatic screw driver (2) is connect with pneumatic element, and with may be programmed
The connection of controller conducting wire;The knife system of walking is connect with electrical component and programmable controller conducting wire;The electrical control
Box (4) is connect with electrical component and programmable controller conducting wire.Disadvantage is that: pneumatic screw driver is compressed due to air
The torsion that reason generates is not consistent, and the screwing force that will cause fastener is inconsistent, can lead to the problem of excessive or too small.
2. Chinese Patent Application No. CN201510403004.9, publication date on November 4th, 2015, this application discloses one
The screw mounting device of kind accurate quantification control, it includes workbench (1), screw-driving apparatus and controller, and workbench (1) is set
Have product clamper (2), product clamper (2) is connected with torque sensor (3), and screw-driving apparatus includes servo motor (5), slows down
Device (6) and screw sleeve (7), the two sides of retarder (6) are equipped with handle (9);Controller include display unit, control unit,
Analog-converted unit, starts switch servo-driver.Disadvantage is that: cost that structure is complicated is high;Torsion control, which uses, to be watched
It takes motor and adds torque sensor to control, between screw sleeve and screw and No-mistake Principle cuts off the component of input power, reliability
It is not high.
Summary of the invention
The present invention provides that a kind of electrical control is simple, it is adjustable to tighten torsion, structure is simple, can in view of the above technical problems
By property, torsion device for screwing up is adjusted in high, low cost fastener.
To achieve the above object the present invention adopts the following technical scheme:
A kind of fastener be adjusted torsion device for screwing up, including chassis, the cylinder being mounted on chassis, slide rail,
PLC, the slide rail are connect by sliding bearing with mobile bracket, and the mobile bracket is connected by connecting bracket and cylinder
It connects;The mobile bracket is equipped with tightening mechanism, and the tightening mechanism is connect by torque force limiting device with tightening tool;The bottom
Frame lower part is equipped with location switch and tightens switch.
The torque force limiting device is steel-ball type torque force limiting device, and the steel-ball type torque force limiting device is equipped with microswitch,
The microswitch is connect with PLC.
The tightening mechanism is air motor, and the gas circuit of the air motor connection is equipped with pressure regulator valve.
The adjustable torsion device for screwing up of above-described fastener tightens force control method, including following characteristics:
(1) PLC, which controls cylinder, moves downward mobile bracket, when mobile bracket encounters the location switch on chassis, PLC control
Air pump starting processed, driving tightening tool carry out automatic tightening operation to the fastener that engine shaft covers;
(2) pass through the input pressure of pressure regulation valve regulation air pump, the torsion of control air pump output;
(3) torsion that steel-ball type torque force limiting device is adjusted according to design requirement, when lashing force reaches the torsion of needs, steel
Ball-type torque force limiting device starts to skid, and the microswitch being arranged on steel-ball type torque force limiting device sends signal to PLC, and PLC is vertical
The air inlet for stopping air pump, is simultaneously emitted by signal and moves up by cylinder, complete this tightening operation;
(4) when mobile bracket, which is encountered, tightens switch, if the microswitch on steel-ball type torque force limiting device is not at this time
Signal is issued, PLC can also stop air pump rotation immediately, while providing signal and moving up by cylinder, can stop tightening operation.
The tightening mechanism is motor.
The adjustable torsion device for screwing up of above-described fastener tightens force control method, including following characteristics:
(1) PLC, which controls cylinder, moves downward mobile bracket, when mobile bracket encounters the location switch on chassis, PLC control
Electric motor starting processed, driving tightening tool carry out automatic tightening operation to the fastener that engine shaft covers;
(2) torsion that steel-ball type torque force limiting device is adjusted according to design requirement, when lashing force reaches the torsion of needs, steel
Ball-type torque force limiting device starts to skid, and the microswitch being arranged on steel-ball type torque force limiting device sends signal to PLC, and PLC is vertical
The rotation for stopping motor, is simultaneously emitted by signal and moves up by cylinder, complete this tightening operation;
(3) when mobile bracket, which is encountered, tightens switch, if the microswitch on steel-ball type torque force limiting device is not at this time
Signal is issued, PLC can also stop motor rotation immediately, while providing signal and moving up by cylinder, can stop tightening operation.
The course of work of the invention:
When work, PLC control cylinder moves downward mobile bracket, when mobile bracket encounters the location switch on chassis,
PLC controls air pump starting, and driving tightening tool carries out automatic tightening operation to the fastener that engine shaft covers, to lashing force
There are three aspects for control: being to reach the torsion of control air pump output, in turn by the input pressure of pressure regulation valve regulation air pump first
Control the purpose of lashing force;Essence is followed by carried out to lashing force by the steel-ball type torque force limiting device between air pump and tightening tool
Really control, when lashing force reaches the torsion of needs, steel-ball type torque force limiting device starts to skid, and interruption tightens fastener
Power, while the microswitch being arranged on steel-ball type torque force limiting device sends signal to PLC, PLC stops the air inlet of air pump immediately,
It is simultaneously emitted by signal to move up by cylinder, completes this tightening operation;Third is when mobile bracket is encountered and tightens switch, such as
Microswitch of the fruit at this time on steel-ball type torque force limiting device does not issue signal, and PLC can also stop air pump rotation immediately, give simultaneously
Signal is moved up by cylinder out, and preventing failure leads to the threaded hole damaged on the present invention and the engine assembled,
Cause unnecessary economic loss.
When tightening mechanism is motor, the present invention equally may be implemented accurately to tighten torsion control: pass through motor first
Steel-ball type torque force limiting device between tightening tool accurately controls lashing force, when lashing force reaches the torsion of needs
When, steel-ball type torque force limiting device starts to skid, and interrupts the lashing force to fastener, while being arranged on steel-ball type torque force limiting device
Microswitch give PLC to send signal, PLC stops motor rotation immediately, while providing signal and moving up by cylinder, completes this
Secondary tightening operation;Followed by when mobile bracket, which is encountered, tightens switch, if the fine motion on steel-ball type torque force limiting device is opened at this time
Pass does not issue signal, and PLC can also stop motor immediately, while providing signal and moving up by cylinder, surpass lashing force will not
It crosses too much, and then part of damage.
The present invention compared with prior art the utility model has the advantages that
1. the torque force limiting device that the present invention uses connection can disengage (switch time about 2ms, 1500 in overload immediately
When [1/min]) protect machinery equipment from damage, operation preparation state is restored in very short time after overload
(down time is very short), while being transported also with accurate, continuous accommodation limit transmitting torque and by the clutch of balls tumble
It is dynamic to can get optimal switch repeatable accuracy;The torque of torque force limiting device is simply easily adjusted and readability, only needs turn adjusting nut, then
Torque value can will be easily disengaged by dial and torque indicator and is adjusted to setting value, therefore lashing force can be achieved in the present invention
It is consistent with the value of setting to adjust the lashing force for accurately installing fastener.
2. there are two different modes to realize the control to lashing force when the present invention uses motor as power, made using air pump
There are three types of different modes to realize the control to lashing force when for power, not only controls lashing force accurate, especially torque force limiting device
Mechanically to connect, reach setting lashing force can Millisecond disconnect the torsion of input, reliability is very high.
3. the configuration of the present invention is simple, low cost, later maintenance is also very easy, power resources are tightened in air pump or motor,
The problems such as oil leak will not be generated, causes to generate pollution to the component of assembly, influences assembling quality, while controlling the main of lashing force
Component is torque force limiting device, and air pump and motor can use common model, not need to use the high-end types such as servo motor, because
The cost of this equipment entirety is lower.
4. present invention control is simple, PLC mainly controls the lifting of cylinder and the start-stop of air pump, does not need to carry out lashing force
It calculates, also not needing electrical components, the investments of electrical component such as torque sensor, simulation conversion unit can also reduce.
5. the torque adjustable range for the torque force limiting device that the present invention uses is big, tightening tool can change into as needed sleeve,
The tools such as cross rises, plum blossom rises, therefore have the characteristics that wide adaptation range.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention;
Parts title and serial number in figure:
Sliding bearing 1, mobile bracket 2, location switch 3 tighten switch 4, connecting bracket 5, tightening mechanism 6, torsion limitation
Device 7, tightening tool 8.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, present invention is further described in detail, but does not limit guarantor of the invention
Protect range and application range:
Embodiment 1:
As shown in Figure 1, the present invention includes chassis, the cylinder being mounted on chassis, slide rail, PLC, slide rail passes through
Sliding bearing 1 is connect with mobile bracket 2, and mobile bracket 2 is connect by connecting bracket 5 with cylinder;Mobile bracket 2, which is equipped with, to be tightened
Mechanism 6, tightening mechanism 6 are connect by torque force limiting device 7 with tightening tool 8;Chassis lower part is equipped with location switch 3 and tightens switch
4。
In the present embodiment, when work, PLC control cylinder moves downward mobile bracket 2, and mobile bracket 2 is encountered on chassis
Location switch 3 when, PLC controls that air pump is pneumatic, and the fastener that driving tightening tool 8 covers engine shaft carries out automatic tightening
Operation carries out the accurate control of lashing force by the torque force limiting device 7 between tightening mechanism 6 and tightening tool 8 to lashing force
Control, when lashing force reaches the torsion of needs, torque force limiting device 7 starts to skid, and cuts off the lashing force to fastener, works as simultaneously
Mobile bracket 2 is encountered when tightening switch 4, if torque force limiting device 7 does not skid at this time, PLC can also stop tightening mechanism immediately
Power input, while providing signal and being moved up by cylinder, preventing failure leads to the damage present invention and assembled
Threaded hole on engine causes unnecessary economic loss.
Embodiment 2:
Difference from example 1 is that: torque force limiting device 7 is steel-ball type torque force limiting device, the limitation of steel-ball type torsion
Device is equipped with microswitch, and microswitch is connect with PLC.
In the present embodiment, when steel-ball type torque force limiting device starts to skid, the lashing force to fastener is interrupted, is arranged simultaneously
Microswitch on steel-ball type torque force limiting device sends signal to PLC, and PLC can stop tightening mechanism 6 immediately, provide letter
Number cylinder is allowed to move up, this tightening operation is completed, simultaneously as not only torsion adjustable range is big for steel-ball type torque force limiting device
It is accurate with adjusting, moreover it is possible to realize that the power of Millisecond disconnects, it is possible to realize more accurate lashing force control.
Embodiment 3:
With embodiment 1 or 2 the difference is that: tightening mechanism 6 be air motor, air motor connection gas circuit on set
There is pressure regulator valve.
In the present embodiment, a kind of control mode adjusted to lashing force is increased, that is, passes through the defeated of pressure regulation valve regulation air pump
Enter pressure, reach the power of control air pump output, and then adjusts the size to the lashing force of fastener.
Embodiment 4:
With embodiment 1 or 2 the difference is that: tightening mechanism 6 be motor.
In the present embodiment, motor can use common model, not need using high-end types such as servo motors, therefore set
Standby whole cost is lower.
When work, lashing force is accurately controlled by the steel-ball type torque force limiting device between motor and motor first,
When lashing force reaches the torsion of needs, steel-ball type torque force limiting device starts to skid, and interrupts the lashing force to fastener, sets simultaneously
The microswitch set on steel-ball type torque force limiting device sends signal to PLC, and PLC stops motor rotation immediately, while providing letter
Number cylinder is allowed to move up, completes this tightening operation;Followed by when mobile bracket, which is encountered, tightens switch, if steel ball at this time
Microswitch on formula torque force limiting device does not issue signal, and PLC can also stop motor immediately, at the same provide signal by cylinder to
Upper movement does not exceed lashing force too much, and then part of damage.
Claims (6)
1. torsion device for screwing up is adjusted in a kind of fastener, including chassis, the cylinder being mounted on chassis, slide rail, PLC,
It is characterized by: the slide rail is connect by sliding bearing (1) with mobile bracket (2), the mobile bracket (2) passes through company
Bracket (5) is connect to connect with cylinder;The mobile bracket (2) is equipped with tightening mechanism (6), and the tightening mechanism (6) passes through torsion
Limiter (7) is connect with tightening tool (8);The chassis lower part is equipped with location switch (3) and tightens switch (4).
2. torsion device for screwing up is adjusted in fastener according to claim 1, it is characterised in that: the torque force limiting device
It (7) is steel-ball type torque force limiting device, the steel-ball type torque force limiting device is equipped with microswitch, and the microswitch and PLC connect
It connects.
3. torsion device for screwing up is adjusted in fastener according to claim 1 or 2, it is characterised in that: the tightening mechanism
It (6) is air motor, the gas circuit of the air motor connection is equipped with pressure regulator valve.
4. torsion device for screwing up is adjusted in fastener according to claim 1 or 2, it is characterised in that: the tightening mechanism
It (6) is motor.
5. the adjustable torsion device for screwing up of fastener according to claim 3 tightens force control method, it is characterised in that:
(1) PLC, which controls cylinder, moves downward mobile bracket (2), when mobile bracket (2) encounter location switch (3) on chassis,
PLC controls air pump starting, and driving tightening tool (8) carries out automatic tightening operation to the fastener that engine shaft covers;
(2) pass through the input pressure of pressure regulation valve regulation air pump, the torsion of control air pump output;
(3) torsion that steel-ball type torque force limiting device is adjusted according to design requirement, when lashing force reaches the torsion of needs, steel-ball type
Torque force limiting device starts to skid, and the microswitch being arranged on steel-ball type torque force limiting device sends signal to PLC, and PLC stops immediately
The only air inlet of air pump is simultaneously emitted by signal and moves up by cylinder, completes this tightening operation;
(4) when mobile bracket touch (2) to tighten switch (4) when, if the microswitch on steel-ball type torque force limiting device is simultaneously at this time
Signal is not issued, and PLC can also stop air pump rotation immediately, while providing signal and moving up by cylinder, can stop tightening work
Industry.
6. the adjustable torsion device for screwing up of fastener according to claim 4 tightens force control method, it is characterised in that:
(1) PLC, which controls cylinder, moves downward mobile bracket (2), when mobile bracket (2) encounter location switch (3) on chassis,
PLC controls electric motor starting, and driving tightening tool (8) carries out automatic tightening operation to the fastener that engine shaft covers;
(2) torsion that steel-ball type torque force limiting device is adjusted according to design requirement, when lashing force reaches the torsion of needs, steel-ball type
Torque force limiting device starts to skid, and the microswitch being arranged on steel-ball type torque force limiting device sends signal to PLC, and PLC stops immediately
The only rotation of motor is simultaneously emitted by signal and moves up by cylinder, completes this tightening operation;
(3) when mobile bracket touch (2) to tighten switch (4) when, if the microswitch on steel-ball type torque force limiting device is simultaneously at this time
Signal is not issued, and PLC can also stop motor rotation immediately, while providing signal and moving up by cylinder, can stop tightening work
Industry.
Priority Applications (1)
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CN201811294658.2A CN109175988A (en) | 2018-11-01 | 2018-11-01 | A kind of fastener is adjusted torsion device for screwing up and tightens force control method |
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CN201811294658.2A CN109175988A (en) | 2018-11-01 | 2018-11-01 | A kind of fastener is adjusted torsion device for screwing up and tightens force control method |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109877570A (en) * | 2019-04-22 | 2019-06-14 | 重庆大江亚普汽车部件有限公司 | A kind of oil pump assembly tooling |
CN110977419A (en) * | 2019-11-29 | 2020-04-10 | 中国第一汽车股份有限公司 | Control method of automatic threaded sleeve assembling mechanism |
CN111037272A (en) * | 2019-12-30 | 2020-04-21 | 山东临工工程机械有限公司 | Full-automatic tightening machine for drive axle bolt |
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CN109877570A (en) * | 2019-04-22 | 2019-06-14 | 重庆大江亚普汽车部件有限公司 | A kind of oil pump assembly tooling |
CN110977419A (en) * | 2019-11-29 | 2020-04-10 | 中国第一汽车股份有限公司 | Control method of automatic threaded sleeve assembling mechanism |
CN110977419B (en) * | 2019-11-29 | 2021-05-07 | 中国第一汽车股份有限公司 | Control method of automatic threaded sleeve assembling mechanism |
CN111037272A (en) * | 2019-12-30 | 2020-04-21 | 山东临工工程机械有限公司 | Full-automatic tightening machine for drive axle bolt |
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Application publication date: 20190111 |