CN103743515A - Wooden material grinding force determining method - Google Patents
Wooden material grinding force determining method Download PDFInfo
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- CN103743515A CN103743515A CN201310750241.3A CN201310750241A CN103743515A CN 103743515 A CN103743515 A CN 103743515A CN 201310750241 A CN201310750241 A CN 201310750241A CN 103743515 A CN103743515 A CN 103743515A
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Abstract
The invention provides a wooden material grinding force determining method. The method comprises the following steps of calibrating the relation between a force in the horizontal direction and an electric signal value by utilizing a deweighting method, carrying out linear-regression analysis on the obtained electric signal value and the force in the horizontal direction to obtain a proportional relation of the grinding force and the electric signal value; horizontally placing a wooden material test piece onto a worktable through a tool, arranging a force sensor between the worktable and the tool, connecting the force sensor with a charge amplifier, connecting the charge amplifier with a signal analyzer, and connecting the signal analyzer with a computer; grinding a wooden product, generating a charge value through the variation of the horizontal force on the test piece detected by the force sensor, utilizing the charge amplifier and amplifying and converting the charge value to a voltage signal to be collected by the signal analyzer, fitting the electric signal collected by the signal analyzer to obtain an electric signal value, and converting the electric signal value according to the proportional relation to obtain a maximal value and an average value of the grinding force. The determination method is strong in real-time property, strong in accuracy, simple, high efficient and reliable.
Description
Technical field
The present invention relates to a kind of assay method of power, be specifically related to a kind of wood materials grinding force assay method, belong to wood processing field.
Background technology
Wide-belt sander is mainly used in fixed thick processing and the plane polishing of the sheet materials such as solid wood board, particieboard, medium density fibre board (MDF), scale board, to obtain good surface quality and decorative effect, and widespread use in furniture, floor, timber, Wood-based Panel Production.
Grinding force is numerous abrasive particles and surface of the work cuts, swiping, friction produce power in grinding process, directly affects grinding process energy consumption, heating, vibration and workpiece surface quality.Take grinding force as reference frame, in design during sander, can better select rapidoprint adapts with it power configuration, sand roller, crawler belt etc., to reduce energy consumption, reduce unnecessary waste of material; In actual production, can select suitable abrasive band speed, speed of feed, grinding thickness and abrasive band order number to obtain better crudy.
But because the surface nature of different woodworks is also different, so there is no grinding force general calculation method accurately in wood materials grinding.And it is not accurate enough indirectly to measure grinding force by methods such as power, and do not there is real-time, can not reflect the variation tendency of grinding force in grinding process.
Up to the present, the measuring method of also not measuring about grinding force in wood materials grinding process.Therefore, in the urgent need to a kind of simple, quick, accurately, there is the grinding force measuring method of real-time.
Summary of the invention
In view of this, the invention provides a kind of assay method of wood materials grinding force, there is the features such as wide, the simple to operate and result of applicability is accurate.
An assay method for wood materials grinding force, these assay method concrete steps are as follows:
Step 1: adopt duplicate removal method to demarcate the relation between horizontal direction power and value of electrical signals, and will obtain value of electrical signals and horizontal direction power is carried out linear regression analysis, thereby obtain the relation between horizontal direction power and value of electrical signals, i.e. relation between grinding force and value of electrical signals;
Step 2: wood materials is placed on worktable by frock level, and power sensor setting is between worktable and frock, and power sensor is connected with charge amplifier, and charge amplifier is connected with signal analyzer, and signal analyzer is connected with computing machine;
Step 3: start grinding woodwork, by power sensor, detect that woodwork produces charge value because suffered horizontal pull changes, after charge amplifier amplifies, being converted into voltage signal is gathered by signal analyzer, the electric signal that signal analyzer collects carries out fitting of a polynomial to crest or trough value after processing after filtering, with the value representation value of electrical signals on curve after matching;
Step 4: demarcate according to step 1 the relation between grinding force and value of electrical signals of obtaining, step 3 is obtained to value of electrical signals and convert grinding force to, obtain woodwork and be subject to maximal value and the mean value of grinding force.
Beneficial effect:
Compared with conventional grinding force assay method, the present invention detects the electric signal of grinding force by power sensor, through charge amplifier and signal analyzer, amplify, analyze, simulate value of electrical signals curve, according to the relation between grinding force and the value of electrical signals of demarcating, obtain maximal value and the mean value of grinding force, assay method real-time, accuracy are strong and simple, efficient, reliable.
Accompanying drawing explanation
Fig. 1 is wide-belt sander grinding process grinding force electrical signal collection system schematic.
Fig. 2 is the schematic diagram of the relation between horizontal direction power value and value of electrical signals of demarcating by duplicate removal method.
Fig. 3 is the value of electrical signals curve map that timing signal counterweight gathers during for 2kg.
Fig. 4 is value of electrical signals and horizontal direction power value linear regression analysis figure.
Fig. 5 is the force analysis figure of workpiece in grinding process.
Fig. 6 is grinding process grinding force electric signal curve map under example 1 grinding condition.
Fig. 7 is that the removal of impurities of going down of example 1 grinding condition involves and removes grinding force electric signal curve map after the ripple after Fen Li with workpiece of abrasive band while not contacting workpiece, abrasive band.
Fig. 8 carries out 2 order polynomial matching schematic diagram with 30 points to trough values all in value of electrical signals curve map under example 1 grinding condition.
Fig. 9 is grinding process grinding force electric signal curve map under example 2 grinding conditions.
Figure 10 is that the removal of impurities of going down of example 2 grinding conditions involves and removes grinding force electric signal curve map after the ripple after Fen Li with workpiece of abrasive band while not contacting workpiece, abrasive band.
Figure 11 carries out 3 order polynomial matching schematic diagram with 30 points to trough values all in value of electrical signals curve map under example 2 grinding conditions.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.
Example 1
The invention provides a kind of assay method of wood materials grinding force, the testing machine that this assay method adopts is that single sand bridge joint touches drum sander, and touch roll is helicla flute rubber rollers, and shore hardness is 25.The grinding thickness and precision of testing machine is 0.05mm.Surveying instrument comprises: KISTLER-3257A sensor, KISTLER5806 charge amplifier, NEC Omniace II RA2300 signal analyzer.
Material therefor is poplar, density 0.44g/cm
3, grinding direction is against to the grain direction.Test specimen length is 150mm, and width is 100mm.Abrasive band model is CXB-508, and abrasive particle adopts electrostatic sand-planting.
Grinding condition: abrasive band order number is 60 orders; Abrasive band speed is 5.35m/s; Speed of feed is 5.14m/s; Grinding thickness is 0.2mm.
This assay method comprises that step is as follows: first the relation between grinding force and value of electrical signals is demarcated, then gather electric signal, electric signal is carried out to filtering, afterwards the crest of electric signal (or trough) value is carried out to matching, the relation of finally passing through between demarcated grinding force and value of electrical signals calculates grinding force value.Concrete assay method step is as follows:
Step 1: adopt duplicate removal method to demarcate the relation between horizontal direction power and value of electrical signals, as shown in Figure 2, with the counterweight of 2kg, 4kg, 6kg, 8kg, by the horizontal direction of fixed pulley and test specimen, be connected respectively, after stable, moment is cut off the iron wire connecting between counterweight and test specimen, at this moment power sensor detects that test specimen produces charge value because suffered horizontal pull changes, and is gathered by signal analyzer after charge amplifier amplifies.Each demarcation repeated 6 times, with the accuracy of guaranteeing to demarcate.
In above-mentioned, with the pass that duplicate removal method is demarcated between power and electric signal be the routine techniques in this area.
Fig. 3 is the counterweight value of electrical signals curve map that signal analyzer gathers during for 2kg, and at this moment in figure, curve mxm. is 19.6N(2kg) corresponding value of electrical signals, the corresponding value of electrical signals of all grinding forces is as follows:
These value of electrical signals and horizontal direction power are carried out to linear regression analysis, as shown in Figure 4, by the relation obtaining between horizontal direction power and value of electrical signals, i.e. relation between grinding force and value of electrical signals, Fx is horizontal direction power:
Fx=± 55.178 × value of electrical signals;
Step 2: grinding force electrical signal collection schematic diagram as shown in Figure 1, test specimen is placed on worktable by frock level, power sensor setting is between worktable and frock, power sensor is connected with charge amplifier, charge amplifier is connected with signal analyzer, and signal analyzer is connected with computing machine.
Step 3: contact roll-type or pressure pad type grinding machine head grinding test specimen, by power sensor, detect that test specimen produces charge value because suffered horizontal pull changes, after amplifying, charge amplifier gathered by signal analyzer, the electric signal that signal analyzer collects carries out fitting of a polynomial to crest (trough) value after processing after filtering, with the value representation grinding force value of electrical signals on curve after matching.
When grinding force value of electrical signals oscillogram is processed, filter due to clutter that abrasive band seam causes, the ripple of when filtering abrasive band and not contacting with workpiece and abrasive band after Fen Li with workpiece; If timing signal horizontal direction power is identical with grinding force direction, crest value of electrical signals is just grinding force value of electrical signals so; If timing signal horizontal direction power and grinding force opposite direction, trough value of electrical signals is just grinding force value of electrical signals so.
When the value of electrical signals of crest (trough) is carried out to fitting of a polynomial, remove the blank value in matched curve, by surplus value replacement grinding force value of electrical signals.
Fig. 5 is the force analysis figure of workpiece in grinding process, and wherein the power FSX of horizontal direction and FNX's makes a concerted effort by being surveyed grinding force FX.
Fig. 6 is grinding process grinding force electric signal curve map, and Fig. 7 is grinding force electric signal curve map after removing clutter and removing the ripple of while not contacting workpiece and abrasive band, abrasive band after Fen Li with workpiece.Because fixed setting and grinding force opposite direction, so the value of electrical signals of trough is corresponding grinding force, Fig. 8 carries out 2 order polynomial matching schematic diagram with 30 points to trough values all in value of electrical signals curve map, remove after matching before curve 11 useless point below, what left point represented is grinding force value of electrical signals.
Step 4: demarcation obtains the relation between grinding force and value of electrical signals according to step 2, step 3 is obtained to value of electrical signals and convert grinding force to, as shown in the table, can obtain maximal value and the mean value of grinding force thus.
Example 2:
Equipment, instrument, scaling method, calibration result used in mensuration process are all identical with example 1.
Material therefor is medium density fibre board (MDF), density 0.741g/cm
3.Test specimen length is 150mm, and width is 100mm.Abrasive band model is CXB-508, and abrasive particle adopts electrostatic sand-planting.
Grinding condition: abrasive band order number is 80 orders; Abrasive band speed is 5.35m/s; Speed of feed is 3.71m/s; Grinding thickness is 0.5mm.
Fig. 9 is grinding process grinding force electric signal curve map, and Figure 10 is grinding force electric signal curve map after removing clutter and removing the ripple of while not contacting workpiece and abrasive band, abrasive band after Fen Li with workpiece.Because fixed setting and grinding force opposite direction, so the value of electrical signals of trough is corresponding grinding force value, Figure 11 carries out 3 order polynomial matching schematic diagram with 30 points to trough values all in value of electrical signals curve map, and putting represented is grinding force value of electrical signals.Convert these value of electrical signals to grinding force, as shown in the table, can obtain thus maximal value and the mean value of grinding force.
In sum, these are only embodiments of the invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a wooden materials grinding force assay method, is characterized in that, these assay method concrete steps are as follows:
Step 1: adopt duplicate removal method to demarcate the relation between horizontal direction power and value of electrical signals, and will obtain value of electrical signals and horizontal direction power is carried out linear regression analysis, thereby obtain the relation between horizontal direction power and value of electrical signals, i.e. relation between grinding force and value of electrical signals;
Step 2: wooden materials is placed on worktable by frock level, and power sensor setting is between worktable and frock, and power sensor is connected with charge amplifier, and charge amplifier is connected with signal analyzer, and signal analyzer is connected with computing machine;
Step 3: start grinding woodwork, by power sensor, detect that woodwork produces charge value because suffered horizontal pull changes, after charge amplifier amplifies, being converted into voltage signal is gathered by signal analyzer, the electric signal that signal analyzer collects carries out fitting of a polynomial to crest or trough value after processing after filtering, with the value representation value of electrical signals on curve after matching;
Step 4: demarcate according to step 1 the relation between grinding force and value of electrical signals of obtaining, step 3 is obtained to value of electrical signals and convert grinding force to, obtain wooden materials and be subject to maximal value and the mean value of grinding force.
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| CN201310750241.3A CN103743515A (en) | 2013-12-31 | 2013-12-31 | Wooden material grinding force determining method |
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| CN201310750241.3A CN103743515A (en) | 2013-12-31 | 2013-12-31 | Wooden material grinding force determining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128883A (en) * | 2014-07-29 | 2014-11-05 | 北京理工大学 | High precision grinding force measuring device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150829A (en) * | 1987-12-07 | 1989-06-13 | Murata Mfg Co Ltd | Method for adjusting mechanical impact force in processing electronic chip parts and mechanical impact force sensor |
| JP2002355782A (en) * | 2001-05-31 | 2002-12-10 | Yaskawa Electric Corp | Working force estimation system and working force estimation method for robot tip |
| CN2813202Y (en) * | 2005-06-15 | 2006-09-06 | 朱风汉 | Wide-belt grinding machine |
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2013
- 2013-12-31 CN CN201310750241.3A patent/CN103743515A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150829A (en) * | 1987-12-07 | 1989-06-13 | Murata Mfg Co Ltd | Method for adjusting mechanical impact force in processing electronic chip parts and mechanical impact force sensor |
| JP2002355782A (en) * | 2001-05-31 | 2002-12-10 | Yaskawa Electric Corp | Working force estimation system and working force estimation method for robot tip |
| CN2813202Y (en) * | 2005-06-15 | 2006-09-06 | 朱风汉 | Wide-belt grinding machine |
Non-Patent Citations (2)
| Title |
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| 吕树滨等: "外圆磨床磨削力的测定", 《机械设计与制造》 * |
| 罗斌等: "木材磨削力和影响磨削力的因素", 《木材加工机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128883A (en) * | 2014-07-29 | 2014-11-05 | 北京理工大学 | High precision grinding force measuring device |
| CN104128883B (en) * | 2014-07-29 | 2016-05-25 | 北京理工大学 | A kind of abrasive power high precision measuring device |
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Application publication date: 20140423 |