CN104895127B - Determine the implant method of filling position and big arm configuration in big arm of digger - Google Patents
Determine the implant method of filling position and big arm configuration in big arm of digger Download PDFInfo
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- CN104895127B CN104895127B CN201510116118.5A CN201510116118A CN104895127B CN 104895127 B CN104895127 B CN 104895127B CN 201510116118 A CN201510116118 A CN 201510116118A CN 104895127 B CN104895127 B CN 104895127B
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Abstract
The invention discloses a kind of determine the implant method of filling position and big arm configuration in big arm of digger, including the digging working condition choosing excavator；Fill implant in the diverse location of big arm of digger structure；Foil gauge is attached to the relevant position of excavator, so that excavator is worked；Large arm structural strain under the different padding scheme of detection, strains less big arm configuration, its intensity is better；Under identical working condition, measure the natural frequency of the big arm configuration under different padding schemes, the higher big arm configuration of natural frequency using vibration test system and analysis system, vibration is less；Under identical working condition, the large arm structural vibration amplitude under different padding schemes is measured by acceleration transducer；The less big arm configuration of Oscillation Amplitude, its damping property is higher；According to result of the test, determine implant filling position in big arm of digger.Filling position specifically in large arm for the foam aluminium alloy be can determine that by the method for the present invention.
Description
Technical field
The present invention relates to a kind of big arm of digger structure of foam aluminium alloy filling and determination implant are in big arm of digger
The method of middle filling position, belongs to engineering machinery field.
Background technology
Excavator as the important member of engineering machinery, in building construction, road construction, municipal gardens, oilfield exploitation, calamity
The places such as evil scene play a significant role, and are that major contribution is made in socio-economic development.The working portion of excavator, main inclusion
Large arm, forearm and scraper bowl.Wherein, large arm is also known as swing arm, is the important process position of excavator, the intensity of this structure, rigidity and
The performance of vibration aspect directly influences the service behaviour of excavator.
In actual applications, excavator will bear the shock loading of complexity, by the big arm configuration of conventional design method design,
Inside is hollow, does not have implant, the situation of intensity not enough, deformation etc. occurs, affect work under some construction operating modes
Safety.And the engine operating frequencies when excavator and its large arm natural frequency close when, big arm configuration can produce resonance, no
Only produce noise, and affect work efficiency and operating accuracy, when serious, cause security incident.Patent CN 103669452A is public
Open a kind of big arm of digger and forearm structure, added implant inside large arm with forearm, but result in large arm and little feeling of heaviness in the arm
The increase of amount, changes the stressing conditions of entirety during excavator initial design.
In consideration of it, needing to design a kind of big arm of digger structure, not changing its original size, keeping its weight change less
In the case of, improve its natural frequency so as to natural frequency is away from engine operating frequencies, strengthen its shock resistance and absorbing energy
Power, reduces deformation during its operation.
Content of the invention
The technical problem to be solved is not change its original size, keeping the less feelings of its weight change
Under condition, provide a kind of big arm of digger structure, compared with commonly big arm configuration, improve its natural frequency, impact resistance and suction
Shake ability, reduce its vibration in operation, reduce deformation during its operation.
A kind of big arm of digger structure designed by the present invention, its shape is identical with ordinary excavator, is improving big arm configuration
On the premise of performance, select the internal specific position of large arm, carry out the filling of foam aluminium alloy.And tested by comparison of design,
Determine the filling position of foam aluminium alloy, specific scheme is as follows：
A kind of method determining foam aluminium alloy filling position in big arm of digger is as follows：
Step 1 chooses the digging working condition of excavator；
Step 2 is in the diverse location filled and process aluminium alloy of big arm of digger structure；
Step 3, under the operating mode of step 1, make excavator work；According to the position setting, foil gauge is attached to excavator
Relevant position, the large arm structural strain under the different padding schemes of detection, strain less big arm configuration, its intensity is better；
Step 4, under identical working condition, using vibration test system and analysis system measurement above-mentioned difference filling sides
The natural frequency of the lower big arm configuration of case, the higher big arm configuration of natural frequency, vibration is less；
Step 5, under identical working condition, by acceleration transducer measure above-mentioned difference padding scheme under large arm knot
Structure Oscillation Amplitude；The less big arm configuration of Oscillation Amplitude, its damping property is higher；
Step 6, according to above-mentioned result of the test, select the scheme that strain is minimum, natural frequency is maximum, amplitude is minimum, determine
Foam aluminium alloy filling position in big arm of digger.
Operating mode described in step 1 includes three kinds：
1), excavator is at maximum digging radius at floor level, and scraper bowl excavates, and scraper bowl enters in performance maximum digging force position
Row excavates；
2), excavator is in and deep-cuts most at pick position, and scraper bowl excavates, and scraper bowl is dug in performance maximum digging force position
Pick；
3), large arm, dipper are at maximum weighted position, and scraper bowl is excavated in performance maximum digging force position.
Detect in step 4 that the method for natural frequency is as follows：
Make large arm produce vibration using hammer in random strike of diverse location of large arm, change acceleration transducer position,
Tested for several times；Three groups of data accurate in measurement result are carried out fast Fourier transform, produces at some frequency values
Significantly crest, this frequency values is exactly the natural frequency value of big arm of digger structure.
Acceleration transducer described in step 4 is arranged on large arm surface.
The ess-strain situation of eight points, in step 3, is measured on the big arm configuration in each padding scheme, eight should
Become piece affixed points to enclose around large arm one.
In step 6 in the internal filled and process aluminium alloy method of large arm it is：
1 according to above-mentioned result of the test, determines foam aluminium alloy filling position in big arm of digger；
2, according to the size of large arm, determine the filling size of foam aluminium alloy, and go out foam aluminium alloy according to dimensioned；
3, in big arm of digger plate welding process, foam aluminium alloy are filled in inside large arm, and are incited somebody to action using binding agent
Large arm is bondd with foam aluminium alloy.
A kind of big arm of digger of filled and process aluminium alloy, in the filling position of big arm of digger determined by said method
It is filled with foam aluminium alloy.
The big arm configuration of described ordinary excavator, excavator rated power is 110KW, and big arm lengths are 5650mm, and large arm is each
Sheet material is welded by the 16Mn steel of different-thickness.
Described foamed Al-allov is by the Al alloy powder of oxidation and separating substance during heating and gasifying
Mutually mix and obtain.It has advantages below：Density is little, and specific stiffness is high, and its bending resistance specific stiffness is 1.5 times of steel, and damping subtracts
Shock stability is high, and impact energy absorbance is high.Additionally, it has the good characteristics being easy to process, can saw, can cut, can dig, millable
Deng easy processing becomes sheet material, web, bar and various profiled piece.
Foam aluminium alloy density of the present invention is 0.6g/cm3, density is less, after being filled into large arm inside, greatly
The weight that arm increases is negligible, and the therefore filling of foam aluminium alloy will not produce larger shadow to excavator entirety stress etc.
Ring.Additionally, its comprcssive strength 12MPa, bending strength is 10MPa, and tensile strength is 6MP, and shock-absorbing capacity is high, energy absorption receive up to
25J/cm3, damping capacity height, the foamed aluminium in-fighting factor reaches 6 × 10-3 .
Beneficial effects of the present invention：
Filling position specifically in large arm for the foam aluminium alloy be can determine that by the method for the present invention, and by big
In arm, filled and process aluminium alloy reduces the deformation in excavator operation for the large arm, through test measurement, at the same conditions, this
The strain of bright large arm more common large arm reduces by 10% about；Improve natural frequency and the resistance to shock of big arm of digger, reduce
The vibration in operation for the excavator, through test measurement, natural frequency improves 8% about, and it is left that Mean Oscillation amplitude reduces 15%
Right.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 (a)-Fig. 1 (e) is the padding scheme schematic diagram of foam aluminium alloy；
Fig. 2 is the large arm schematic diagram of foam aluminium alloy filling；
Fig. 3 is strain gauge adhesion position view；
Fig. 4 is ess-strain detecting system schematic diagram；
Fig. 5 is vibrational system instrumentation plan；
In figure, 1：Large arm sheet material, 2：Binding agent, 3：Foam aluminium alloy.
Specific embodiment
In order to be expressly understood features described above and the advantage of the present invention, by example below, large arm of the present invention is tied
Structure is contrasted with commonly big arm configuration.
Selected ordinary excavator large arm structural reference model excavator, excavator rated power is 110KW, big arm lengths
For 5650mm, each sheet material of large arm is welded by the 16Mn steel of different-thickness.
5 kinds of padding schemes of design, such as shown in Fig. 1 (a)-Fig. 1 (e), wherein
Fig. 1 (a) is scheme 1：For being all not filled with；
Fig. 1 (e) is scheme 5：For being stuffed entirely with；
Fig. 1 (b)-Fig. 1 (d) is scheme 2,3,4：For selective filling.
The large arm structural representation of foam aluminium alloy filling as shown in Fig. 2 large arm shape is identical with common large arm, fill out by inside
Fill foam aluminium alloy, as shown in Figure 2, foam aluminium alloy 3 is bonded in large arm sheet material by binding agent 2 in its section.
Carry out contrast test, test apparatuses are made up of existing dynamic strain measuring system and vibration test system, dynamically
Strain measurement system measures the ess-strain of big arm of digger, and Vibration Testing System gathers the vibration signal of large arm.
Concrete test procedure is as follows：
1) determine the work operating mode of digging machine：
The first operating mode：Excavator is at maximum digging radius at floor level, and scraper bowl excavates, and scraper bowl is playing maximum excavation
Power position is excavated；
Second operating mode：Excavator is in and deep-cuts most at pick position, and scraper bowl excavates, and scraper bowl is playing maximum digging force position
Excavated；
The third operating mode：Large arm, dipper are at maximum weighted position, and scraper bowl is dug in performance maximum digging force position
Pick.
2) padding scheme in design 5, such as Fig. 1 (a) is scheme 1：For being all not filled with；If Fig. 1 (e) is scheme 5：For whole
Filling；If Fig. 1 (b)-Fig. 1 (d) is scheme 2,3,4：For selective filling.
3) loading characteristic according to large arm, the stress measuring eight points on the big arm configuration in each padding scheme should
Change situation, the position of strain gauge adhesion point is as shown in Figure 3.For detecting the vibration in operation for the large arm, acceleration transducer is pacified
It is contained in large arm surface.
4), operation excavator work under above-mentioned three kinds of selected operating modes, 5 kinds of scheme large arm measurement points of real-time detection should
Become, detecting system schematic diagram as shown in figure 4, meanwhile acceleration transducer gather large arm vibration signal；
5), the strain of 5 kinds of schemes is contrasted, be computed, discovery scheme 3 and scheme 5 are strained less, more common large arm
Structural strain reduces 10% about.The vibration signal collecting in 5 is contrasted, finds the Mean Oscillation amplitude of scheme 3 and scheme 5
Bigger arm configuration reduces 15% about.
6), the method for measurement natural frequency is, so that large arm generation is shaken using hammer in random strike of diverse location of large arm
Dynamic, change acceleration transducer position, tested for several times.Preferable for measurement result three groups of data are carried out fast Fourier change
Change it can be seen that producing obvious crest at some frequency values, this frequency values is just likely to consolidating of big arm of digger structure
There are frequency values.Large arm vibration test system schematic diagram is as shown in Figure 4.
7), measure the natural frequency of 5 kinds of big arm configurations with method in 4 respectively, find through contrast, the big arm configuration of scheme 3
The more common large arm of natural frequency improves 8% about, and the more common large arm of scheme 5 large arm structural natural frequencies improves 8.5% about.
To sum up result, and consider the problems such as foam aluminium alloy cost and construction store doses, preferred foam aluminium alloy is filled out
Filling scheme is scheme 3.
Inside large arm, filled and process aluminium alloy method is：
1 according to above-mentioned result of the test, determines foam aluminium alloy filling position in big arm of digger；
2, according to the size of large arm, determine the filling size of foam aluminium alloy, and go out foam aluminium alloy according to dimensioned；
3, in big arm of digger plate welding process, foam aluminium alloy are filled in inside large arm, and are incited somebody to action using binding agent
Large arm is bondd with foam aluminium alloy.
According to above-mentioned test structure, obtain a kind of big arm of digger of filled and process aluminium alloy, be characterized in, in above-mentioned side
The filling position of big arm of digger determined by method is filled with foam aluminium alloy.
Foamed Al-allov is to mix the Al alloy powder of oxidation with separating substance phase during heating and gasifying
Close and obtain, be a kind of current material；It has advantages below：Density is little, and specific stiffness is high, and its bending resistance specific stiffness is steel
1.5 times, damping characteristics are high, and impact energy absorbance is high.Additionally, it has the good characteristics being easy to process, can saw, can
Cut, can dig, millable etc., easy processing becomes sheet material, web, bar and various profiled piece.
Foam aluminium alloy density of the present invention is 0.6g/cm3, density is less, after being filled into large arm inside, greatly
The weight that arm increases is negligible, and the therefore filling of foam aluminium alloy will not produce larger shadow to excavator entirety stress etc.
Ring.Additionally, its comprcssive strength 12MPa, bending strength is 10MPa, and tensile strength is 6MP, and shock-absorbing capacity is high,
Energy absorption is received up to 25J/cm3Left and right, damping capacity is high, and the foamed aluminium in-fighting factor reaches 6 × 10-3 .
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not
Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.
Claims (10)
1. a kind of method determining implant filling position in big arm of digger is it is characterised in that as follows：
Step 1, the digging working condition of selection excavator；
Step 2, big arm of digger structure diverse location fill implant；
Step 3, according to set position, foil gauge is attached to the relevant position of excavator, under the operating mode of step 1, makes excavation
Machine works；Large arm structural strain under the different padding scheme of detection, strains less big arm configuration, its intensity is better；
Step 4, under identical working condition, using vibration test system and analysis system measurement above-mentioned difference padding schemes under
Under big arm configuration natural frequency, the higher big arm configuration of natural frequency, vibration less；
Step 5, under identical working condition, by acceleration transducer measure above-mentioned difference padding scheme under big arm configuration shake
Dynamic amplitude；The less big arm configuration of Oscillation Amplitude, its damping property is higher；
Step 6, the result of the test according to step 3-5, select the scheme that strain is minimum, natural frequency is maximum, amplitude is minimum, determine
Implant filling position in big arm of digger.
2. as claimed in claim 1 determine implant filling position in big arm of digger method it is characterised in that：Step
Operating mode described in 1 includes three kinds of operating modes：
1）, excavator be at maximum digging radius at floor level, scraper bowl excavate, scraper bowl play maximum digging force position dug
Pick；
2）, excavator be in deep-cut most pick position at, scraper bowl excavate, scraper bowl play maximum digging force position excavated；
3）, large arm, dipper be at maximum weighted position, scraper bowl is excavated playing maximum digging force position.
3. as claimed in claim 1 determine implant filling position in big arm of digger method it is characterised in that：Step
Detect in 4 that the method for natural frequency is as follows：
Make large arm produce vibration using hammer in random strike of diverse location of large arm, change acceleration transducer position, carry out
Test for several times；Three groups of data accurate in measurement result are carried out fast Fourier transform, produces substantially at some frequency values
Crest, this frequency values is exactly the natural frequency value of big arm of digger structure.
4. as claimed in claim 3 determine implant filling position in big arm of digger method it is characterised in that：Step
Acceleration transducer described in 4 is arranged on large arm surface.
5. as claimed in claim 1 determine implant filling position in big arm of digger method it is characterised in that：Every
The ess-strain situation of eight points is measured on the big arm configuration in a kind of padding scheme, eight strain gauge adhesion points are around large arm one
Circle.
6. as claimed in claim 1 determine implant filling position in big arm of digger method it is characterised in that：Step
Implant in 6 is foam aluminium alloy, in the internal filled and process aluminium alloy method of large arm is：
6-1, according to the result of the test of step 3-5, determines foam aluminium alloy filling position in big arm of digger；
6-2, according to the size of large arm, determines the filling size of foam aluminium alloy, and goes out foam aluminium alloy according to dimensioned；
6-3, in big arm of digger plate welding process, foam aluminium alloy is filled in inside large arm, and will be big using binding agent
Arm is bondd with foam aluminium alloy.
7. a kind of big arm configuration is it is characterised in that the filling position in big arm of digger determined by claim 1 is filled with bubble
Foam aluminium alloy.
8. as claimed in claim 7 big arm configuration it is characterised in that described foam aluminium alloy density is 0.6g/cm3.
9. as claimed in claim 7 big arm configuration it is characterised in that the comprcssive strength of described foam aluminium alloy is 12MPa,
Bending strength is 10MPa, and tensile strength is 6MPa, and energy absorption is received as 25J/cm, and the foamed aluminium in-fighting factor reaches 6 × 10-3 .
10. as claimed in claim 7 big arm configuration it is characterised in that described foam aluminium alloy is bonded in by binding agent
The inside of big arm of digger.
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| CN201510116118.5A CN104895127B (en) | 2015-03-17 | 2015-03-17 | Determine the implant method of filling position and big arm configuration in big arm of digger |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082705A (en) * | 2001-09-10 | 2003-03-19 | Hitachi Constr Mach Co Ltd | Turning frame of construction machine and its of manufacturing method |
| JP2014074339A (en) * | 2012-10-02 | 2014-04-24 | Komatsu Ltd | Engine unit |
| CN203716198U (en) * | 2013-12-26 | 2014-07-16 | 山河智能装备股份有限公司 | Detection device for strength of movable arm of excavator |
| CN203834532U (en) * | 2014-04-24 | 2014-09-17 | 东莞市海德机械有限公司 | Rock drilling arm and strong rock drilling arm excavator |
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2015
- 2015-03-17 CN CN201510116118.5A patent/CN104895127B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082705A (en) * | 2001-09-10 | 2003-03-19 | Hitachi Constr Mach Co Ltd | Turning frame of construction machine and its of manufacturing method |
| JP2014074339A (en) * | 2012-10-02 | 2014-04-24 | Komatsu Ltd | Engine unit |
| CN203716198U (en) * | 2013-12-26 | 2014-07-16 | 山河智能装备股份有限公司 | Detection device for strength of movable arm of excavator |
| CN203834532U (en) * | 2014-04-24 | 2014-09-17 | 东莞市海德机械有限公司 | Rock drilling arm and strong rock drilling arm excavator |
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