CN105081881A - Device and method measuring high rotating speed/superhigh rotating speed three dimensional cutting force - Google Patents
Device and method measuring high rotating speed/superhigh rotating speed three dimensional cutting force Download PDFInfo
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- CN105081881A CN105081881A CN201410187412.0A CN201410187412A CN105081881A CN 105081881 A CN105081881 A CN 105081881A CN 201410187412 A CN201410187412 A CN 201410187412A CN 105081881 A CN105081881 A CN 105081881A
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- rotating speed
- workpiece
- cut
- cutting force
- frequency
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/099—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring features of the machined workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2717/00—Arrangements for indicating or measuring
- B23Q2717/006—Arrangements for indicating or measuring in milling machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device and method using dynamics reverse engineering technology to obtain three dimensional cutting force; the device comprises a cantilever structure and a fixing device suitable for cutting process under a high rotating speed/superhigh rotating speed condition, a resistance foil gauge and strain gauge measuring workpiece surface deformation, and an oscilloscope displaying workpiece surface stress and frequency. The cantilever beam surface stress obtained by the resistance foil gauge can be converted into three dimensional cutting force size and frequency through mechanics of materials and cantilever beam dynamics knowledge. The device and method can use dynamics reverse engineering technology to measure three dimensional cutting force; the device is clear in principle, simple in device, high in measure precision, wide in application scope, can measure cutting force size and frequency under the high rotating speed/superhigh rotating speed processing condition, thus solving the problems that an existing dynamometer under high rotating speed/superhigh rotating speed condition is small in fixed frequency, and distorted in signal.
Description
Technical field
The present invention relates to a kind of device and method measuring metal cutting power, belong to metal cutting process cutting mechanisms research field.
Background technology
Cutting force is one of important state parameter in metal cutting process, it is the important research object in metal cutting process mechanism and process application research, the acquisition of accurate Cutting Force Signal is the important prerequisite of carrying out cutting force analysis, most important to the accurate evaluation of working angles.
The device carrying out cutting force measurement at present has: mechanical dynamometer, hydraulic load cell, inductance dynamometer, electric capacity dynamometer, resistance-strain type of dynamometer instrument and piezoelectric force instrument, and wherein most widely used be piezoelectric type dynamometer and resistance-strain dynamometer.
(1) piezoelectric type dynamometer.
Piezoelectric type dynamometer is based on piezo-electric effect principle, is that sensing element is assembled with piezo-electric crystal.Piezoelectric type dynamometer sound state good rigidly, has that intrinsic frequency is high, frequency response and an advantage such as transient response is good, working band is wide and measure error is little.But piezoelectric type dynamometer point site error is comparatively large, is easy to puncture electron tube, safeguard inconvenient, and its assembly precision requires high, expensive, thus limit its extensive use.
(2) resistance-strain type of dynamometer instrument.
Resistance-strain type of dynamometer instrument has dependable performance, and cost is low, dynamic static accuracy is high, long-time stability good, sturdy and durable, good manufacturability and be suitable for the advantages such as various adverse circumstances uses.Resistance strain gage also claims strain ga(u)ge, and being called for short foil gauge or strain gauge, is the element being configured for monitor strain by sensitive grid etc.The change that mechanical component strains can be converted to resistance variations by it, is a kind of proportional component, not only can measure the strain under dead load, can measuring frequency scope be also the dynamic strain of 0 ~ 500kHz, in the force cell used at present, account for 90%.Existing resistance-type strain-ga(u)ge dynamometer is in order to obtain higher intrinsic frequency, and often mechanism is more complicated, and its range of application is reduced.
Summary of the invention
The present invention is based on Machining Technology for Cutting, cantilever beam dynamics reverse technology and foil gauge measuring technology, for the deficiency of distortion in current high rotating speed and ultrahigh rotating speed Milling Force signal acquisition process, propose a kind of method being solved D cutting operations power in milling process by dynamics inverse estimation method, and devising a kind of new high natural frequency D cutting operations force test device, the collection that can realize D cutting operations power under the high frequency Cutting and machining conditions such as high rotating speed and ultrahigh rotating speed is measured.
The present invention is in order to solve the deficiency of D cutting operations power acquisition problems distorted signals in high rotating speed/ultrahigh rotating speed milling process, and the major programme adopted is as follows:
Under high rotating speed/ultrahigh rotating speed Cutting and machining conditions, a testing arrangement for D cutting operations power, mainly comprises topping machanism and testing arrangement, and topping machanism is made up of milling cutter and workpiece to be cut, and testing arrangement is made up of fixed platform, foil gauge and strain testing instrument.Fixed platform is divided into two-layer, and lower floor is processed with holddown groove, adopts interference fit between the width of workpiece to be cut and the size of height and holddown groove.The upper and lower of fixed platform are bolted, and workpiece to be cut inserts between the levels of fixed platform, utilizes the pretightning force between the upper and lower of fixed platform to compress workpiece to be cut, thus holding workpiece stablizing in cutting process.Then paste two groups of resistance strain gages at the upper surface of workpiece to be cut and side surface respectively, each group resistance strain gage comprises two foil gauges, the STRESS VARIATION of each independent measured surface.The stress signal of the surface of the work to be cut collected by resistance strain gage is input to oscillograph after strain testing instrument amplification process.Finally, the stress of strain gage testing is converted into the cutting force of workpiece end to be cut according to the mechanics of materials and cantilever beam dynamics knowledge.The cantilevered length adjusting workpiece to be cut can test the intrinsic frequency of whole system, thus avoids the distorted signals under different cutting frequency condition.
Accompanying drawing explanation
Beam type height rotating speed/ultrahigh rotating speed cutting dynamometer structural representation and wiring diagram.
Detailed description of the invention
Below with reference to accompanying drawing, structure & working mechanism of the present invention and solution procedure are described in detail.
As shown in the figure, the invention provides a kind of testing arrangement and method of high rotating speed/ultrahigh rotating speed Three dimensional dynamic cutting force, its test platform forms primarily of milling cutter 1, workpiece to be cut 2, fixed platform 3, resistance strain gage 4, strain testing instrument 5 and oscillograph 6.Milling cutter 1 to be arranged on machine tool chief axis and to do high rotating speed/ultrahigh rotating speed with machine tool chief axis and rotates.Workpiece 2 to be cut is fixed in fixed platform 3 by bolt presses, and on the motion platform of lathe, does horizontal movement with fixed platform 3.Resistance strain gage 4(P
1, P
2, P
3, P
4) be pasted onto upper surface and the side surface of workpiece 2 to be cut, often organize resistance strain gage apart from workpiece 2 end face to be cut distance (
l 1,
l 2,
l 3,
l 4) can be any distance.The data collected by resistance strain gage 4 to be amplified after process by data line transfer to oscillograph 6 through strain testing instrument 5, and oscilloscope display also records size and the frequency of its stress.
When the high rotating speed/ultrahigh rotating speed of milling cutter 1 cuts workpiece 2 to be cut, treat cutting workpiece 2 and apply three-dimensional active force, produce respectively
ox, oy, ozthe active force in three directions.Tension and compression deformation and flexural deformation is produced respectively on the surface of workpiece 2 to be cut.Formula (1) gives the relation between the stress of each group resistance strain gage and cutting force, in formula
for workpiece 2 to be cut exists
yozplane around
oxvibration frequency during axle generation transverse curvature,
for workpiece 2 to be cut exists
xozplane around
oyvibration frequency during axle generation transverse curvature,
for workpiece 2 to be cut is subject to
ozthe vibration frequency during compression in direction,
l ifor resistance strain gage is from the distance of workpiece 2 cantilever end to be cut,
afor workpiece 2 to be cut is parallel
xoythe area of cross section,
w xfor workpiece 2 to be cut exists
yozplane around
oxbending resistant section coefficient during axle generation transverse curvature,
w yfor workpiece 2 to be cut exists
xozplane around
oybending resistant section coefficient during axle generation transverse curvature.Formula (1) is carried out distortion and obtains formula (2), obtain size and the frequency of D cutting operations power in high rotating speed/ultrahigh rotating speed milling process, thus realize the measurement of high rotating speed or ultrahigh rotating speed cutting force.
(1)
(2)
In sum, the present invention proposes a kind of device and method measuring high rotating speed/ultrahigh rotating speed Three dimensional dynamic cutting force, focus on workpiece to be cut as cantilever beam test platform, utilize the size of different surfaces diverse location stress on resistance strain gage and strain testing instrument cantilever beam and frequency and through oscilloscope display and record, utilize dynamics reverse technology to try to achieve dynamic cutting force in high rotating speed/ultrahigh rotating speed three-dimensional process.
More than implement concrete case and be only explanation technical method of the present invention, can not limit protection scope of the present invention with this, every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (1)
1. the invention discloses a kind of apparatus and method being obtained D cutting operations power under high rotating speed/ultrahigh rotating speed condition by dynamics reverse technology, the testing arrangement of the D cutting operations power under high rotating speed/ultrahigh rotating speed machining condition proposed by the invention mainly comprises: milling cutter, workpiece to be cut, fixed platform, resistance strain gage, deformeter and oscillograph; Fixed platform is fixed in workpiece one end to be cut, and one end overhangs and forms cantilever beam structure; Two groups of resistance strain gages are respectively pasted at the upper surface of workpiece to be cut and side surface distance end face a distance, by the STRESS VARIATION under resistance strain gage and strain-ga(u)ge measurement workpiece surface height rotating speed/ultrahigh rotating speed processing conditions to be cut, and by data line transfer to oscillograph shows and record; According to the knowledge of the mechanics of materials, the combined stress that the tension and compression deformation be subject to by resistance strain gage and flexural deformation produce is decomposed, and realizes the measurement of D cutting operations power size on workpiece to be cut and frequency by dynamics reverse technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187412.0A CN105081881A (en) | 2014-05-05 | 2014-05-05 | Device and method measuring high rotating speed/superhigh rotating speed three dimensional cutting force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187412.0A CN105081881A (en) | 2014-05-05 | 2014-05-05 | Device and method measuring high rotating speed/superhigh rotating speed three dimensional cutting force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105081881A true CN105081881A (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187412.0A Pending CN105081881A (en) | 2014-05-05 | 2014-05-05 | Device and method measuring high rotating speed/superhigh rotating speed three dimensional cutting force |
Country Status (1)
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|---|---|
| CN (1) | CN105081881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192488A (en) * | 2017-06-15 | 2017-09-22 | 西安交通大学 | A kind of broadband cutting force measurement device |
| CN107314849A (en) * | 2017-08-21 | 2017-11-03 | 哈尔滨工业大学（威海） | A kind of sensor with the small high frequency Cutting Force Signal measurement capability of three-dimensional |
| CN115042012A (en) * | 2022-07-01 | 2022-09-13 | 北京理工大学 | Method for measuring three-dimensional stress of surface of drill hole in machining process |
-
2014
- 2014-05-05 CN CN201410187412.0A patent/CN105081881A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192488A (en) * | 2017-06-15 | 2017-09-22 | 西安交通大学 | A kind of broadband cutting force measurement device |
| CN107192488B (en) * | 2017-06-15 | 2019-04-09 | 西安交通大学 | A kind of broadband cutting force measurement device |
| CN107314849A (en) * | 2017-08-21 | 2017-11-03 | 哈尔滨工业大学（威海） | A kind of sensor with the small high frequency Cutting Force Signal measurement capability of three-dimensional |
| CN115042012A (en) * | 2022-07-01 | 2022-09-13 | 北京理工大学 | Method for measuring three-dimensional stress of surface of drill hole in machining process |
| CN115042012B (en) * | 2022-07-01 | 2023-10-20 | 北京理工大学 | Method for measuring three-dimensional stress of drilling surface in machining process |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |