CN105033764A - Method for detecting quenched steel die milling stability - Google Patents
Method for detecting quenched steel die milling stability Download PDFInfo
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- CN105033764A CN105033764A CN201510362941.4A CN201510362941A CN105033764A CN 105033764 A CN105033764 A CN 105033764A CN 201510362941 A CN201510362941 A CN 201510362941A CN 105033764 A CN105033764 A CN 105033764A
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Abstract
The invention provides a method for detecting quenched steel die milling stability. The method includes the steps that 1, the safe stability of a machine tool and a high-speed milling cutter is tested; 2, the high-speed milling stability of the convex-concave curved surface of quenched steel is tested; 3, a process design method for milling the curved surface of the quenched steel efficiently and stably is adopted; and 4, a technical scheme for milling a convex-concave die of the quenched steel at a high speed is determined. The quenched steel die is cut according to the machine tool, the milling cutter and a cutting parameter selected from the detection method, the problem that the efficient milling stability of the quenched steel is lowered due to the fact that the machine tool is not matched with the dynamics performance of the high-speed milling cutter is solved, and the cutting efficiency and machining quality of the quenched steel die are improved.
Description
Technical field:
The present invention relates to a kind of process design method of high-speed milling hardened steel mould, be specifically related to a kind of lathe that solves and do not mate the detection method with the hardened steel mould milling stability of hardened steel high-efficient milling stability decline problem with high-speed milling cutter dynamic performance.
Background technology:
During high-rate wireless LAN hardened steel mould, require the process-cycle shortening mould with high stock-removing efficiency on the one hand, improve mould production efficiency, requirement can ensure machining accuracy and the machined surface quality of hardened steel mould on the other hand, and can its key be the stability of high-speed milling that effectively control this type of die face.Because hardened steel die face is complicated, its case hardness reaches more than HRC50, die face high rigidity and the changeable caused high-speed milling drag change of geometric properties are frequently, exacerbate the vibration of lathe, milling cutter and workpiece, high-speed milling instability problem is given prominence to, and directly affects machined surface quality and the working (machining) efficiency of high-speed milling hardened steel mould.
The process of the stability of high-speed milling of existing control hardened steel mould is analyzed for single factor test, only provide lathe or the one-side cutting stability control program of cutter, semi-discrete method and zeroth-order approximation is specifically adopted to predict the cutting stability limit of two free degree high-speed milling systems, and propose the prediction rule of limit of stability, give lathe or the one-side cutting stability control program of cutter, the stability of high-speed milling problem under multifactor impact cannot be solved, and for be that processing soft light-alloy and hardness are less than the steel alloy of HRC40.And in actual High Speed Milling of Hardened Steels process, cutter, lathe and workpiece integrally have an impact to High Speed Milling of Hardened Steels stability.Existing process data and method for designing cannot meet the demand that hardened steel mould is efficient, high-quality is processed, and how to obtain the process program of efficient stable milling hardened steel, become the key issue that hardened steel mould manufacturing enterprise is urgently to be resolved hurrily.
Summary of the invention:
The present invention is directed to the impact on high-speed milling hardened steel die table of workpiece, lathe, cutter and cutting parameter, provide a kind of detection method of hardened steel mould milling stability, the lathe detected by the method, milling cutter and cutting parameter are cut hardened steel mould, solve the problem that the hardened steel high-efficient milling stability that causes because lathe does not mate with high-speed milling cutter dynamic performance declines, improve stock-removing efficiency and the crudy of hardened steel mould.
The detection method of hardened steel mould milling stability of the present invention, technical scheme adopted for achieving the above object is to comprise the following steps:
The first step, lathe and high-speed milling cutter security and stability are tested:
Two identical high speed rose cutters are arranged on respectively two different enterprising line spaces of lathe to turn, and on these two lathes, eddy current displacement sensor and ICP acceleration transducer are installed simultaneously, within the scope of the maximum speed that lathe allows, from rotating speed 1000rpm, each test increases rotating speed 500rpm and successively improves milling cutter rotating speed, until there is sudden change in machine tool chief axis vibration, meanwhile, the spectrum signal of machine tool chief axis under different rotating speeds and vibration acceleration signal is extracted by eddy current displacement sensor and ICP acceleration transducer, according to rotating speed during milling cutter idle running on machine tool chief axis main frequency of vibration and the impact of vibration acceleration amplitude, the rotating speed suddenlyd change to cause milling cutter vibration acceleration amplitude is as the critical speed of milling cutter security and stability, the maximum speed that when determining that milling cutter dallies, lathe and high-speed milling cutter safety and stability are cut, select each test simultaneously and can maintain the milling cutter that stable idle running 3 minutes milling cutters without safety issue are used as meeting safety and stability cutting,
Second step, hardened steel concave and convex surface stability of high-speed milling are tested:
Adopt two high speed rose cutters through security and stability test in the first step, to be parallel to the cutting path in specimen width direction, milling cutter rotating speed, feed speed, milling depth and milling width is determined by hardened steel stock-removing efficiency and finishing step requirement, two lathes used in a first step respectively carry out cutting experiment to obtain the milled surface topography of hardened steel concave and convex surface test specimen to hardened steel concave and convex surface test specimen, obtains machine tool chief axis rumble spectrum and vibration acceleration signal by eddy current displacement sensor and ICP acceleration transducer simultaneously;
The process design method of the 3rd step, efficient stable milling hardened steel curved surface:
First the test result of the first step and second step is utilized, contrast lathe when milling cutter dallies and cutting of hardened steel concave and convex surface test specimen time, press along feed speed, the size of milling width and milling depth direction vibration frequency and vibration amplitude excursion, and the testing result of hardened steel concave and convex surface test specimen milled surface topography, lathe and milling cutter dynamic property matching are identified and evaluated, select the lathe meeting efficient stable cutting of hardened steel and require, then require as design object with the working (machining) efficiency and milled surface topography that meet hardened steel concave and convex surface test specimen, determine the milling cutter rotating speed of high-speed cutting hardened steel, feed speed, the span of milling depth and milling width,
4th step, determine the process program of high-speed milling hardened steel punch-die:
Utilize the lathe selected through milling cutter, the 3rd step of safety and stability test in the first step and through the span of the determined milling cutter rotating speed of the 3rd step, feed speed, milling depth, milling width, automobile internal covering part hardened steel punch-die cut.
Further, in second step hardened steel convex surface test specimen in the width direction convex curvature radius be 200mm, be that 1170mm, 66mm are connected successively with three sections of convex surfaces of 1140mm by convex curvature radius along its length; Hardened steel concave curved surface test specimen in the width direction recessed radius of curvature is 200mm, is that 1140mm, 66mm are connected successively with three sections of concave curved surfaces of 1112mm along its length by recessed radius of curvature, bent specimen hardness HRC55 ~ 60 of hardened steel convex-concave.
The test specimen of this size and the adjoining dimensions of hardened steel mould to be processed, fully to simulate the situation of hardened steel mould to be processed by this test specimen.
Further, two lathes used in the first step are three axis numerically controlled machine XH715 and five-axle number control machine tool UCP710, and these two kinds of lathes are the conventional lathe of Machining Hardened Steels mould.
Further, milling cutter used in the first step is the indexable high speed rose cutter of diameter 20mm two tooth, and this cutter is the conventional milling cutter of Machining Hardened Steels mould.
Beneficial effect of the present invention is: the present invention considers workpiece, lathe, cutter, the factor such as cutting parameter and milled surface topography, give high rigidity hardened steel die curve curvature, the Alternative variablees such as lathe and cutter security and stability are to the testing method of High Speed Milling of Hardened Steels stability influence, the process program stablizing at a high speed cutting of hardened steel mould is obtained by this detection method, efficiently solve stock-removing efficiency in hardened steel mold high speed Milling Process, collision problem between cutting vibration and milled surface topography, efficient for realizing hardened steel mould, high accuracy and great surface quality processing provide guarantee.
Accompanying drawing illustrates:
Fig. 1 is the process sequence diagram of detection method, and in figure, M is milling vibration amplitude, M
maxfor the milling vibration amplitude maximum allowed, Ra is Milling Process surface roughness, Ra
maxfor the Milling Process surface roughness maximum allowed;
Fig. 2 is three axis numerically controlled machine XH715 and the milling cutter vibration characteristics figure along direction of feed;
Fig. 3 is three axis numerically controlled machine XH715 and the milling cutter vibration characteristics figure along milling width;
Fig. 4 is three axis numerically controlled machine XH715 and the milling cutter vibration characteristics figure along milling depth direction;
Fig. 5 is five-axle number control machine tool UCP710 and the milling cutter vibration characteristics figure along direction of feed;
Fig. 6 is five-axle number control machine tool UCP710 and the milling cutter vibration characteristics figure along milling width;
Fig. 7 is five-axle number control machine tool UCP710 and the milling cutter vibration characteristics figure along milling depth direction;
Fig. 8 is the milled surface topography figure of three axis numerically controlled machine XH715 and milling cutter cutting of hardened steel convex surface test specimen;
Fig. 9 is the milled surface topography figure of five-axle number control machine tool UCP710 and milling cutter cutting of hardened steel convex surface test specimen;
Figure 10 is the milled surface topography figure of three axis numerically controlled machine XH715 and milling cutter cutting of hardened steel concave curved surface test specimen;
Figure 11 is the milled surface topography figure of five-axle number control machine tool UCP710 and milling cutter cutting of hardened steel concave curved surface test specimen;
Figure 12 is efficient stable cutting of hardened steel Process Planning figure, in figure: A
ifor the process conditions that high-speed milling hardened steel is feasible, A
1for meeting the process conditions of lathe and milling cutter security and stability, A
2for meeting the process conditions of hardened steel stock-removing efficiency target, A
3for the process conditions of efficient stable cutting of hardened steel, A
4for the process conditions that hardened steel milled surface topography requires;
Figure 13 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the acceleration signal oscillogram of direction of feed;
Figure 14 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the acceleration signal oscillogram of milling width;
Figure 15 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the acceleration signal oscillogram in milling depth direction;
Figure 16 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the spectrum signal oscillogram of direction of feed;
Figure 17 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the spectrum signal oscillogram of milling width;
Figure 18 be three axis numerically controlled machine XH715 and milling cutter under rotating speed 1000rpm along the spectrum signal oscillogram in milling depth direction.
Detailed description of the invention:
The detection method of hardened steel mould milling stability of the present invention, comprises the following steps:
With reference to Fig. 1, below with hardened steel punch-die milled surface topography unanimously for the requirement of hardened steel finishing step is described the specific embodiment of the present invention:
The first step, lathe and high-speed milling cutter security and stability are tested:
Two identical indexable high speed rose cutters of diameter 20mm two tooth being provided with coated cemented carbide insert are adopted to be arranged on three axis numerically controlled machine XH715 and five-axle number control machine tool UCP710 respectively, the Mold processing of two milling cutters is 92mm, the radial error of two milling cutters is 0.01mm, two lathes being specified along transverse shifting direction, workbench left and right is direction of feed, before and after workbench, vertically move direction is milling width, be milling depth direction along machine tool chief axis direction, vibration acceleration signal and the spectrum signal of two machine tool chief axis is extracted by being arranged on eddy current displacement sensor on two lathes and ICP acceleration transducer, within the scope of the maximum speed that two lathes allow, from rotating speed 1000rpm, increase rotating speed 500rpm by each test and successively improve milling cutter rotating speed, until there is sudden change in machine tool chief axis vibration, milling cutter idle running 3min is maintained to carry out the test of milling cutter security and stability in each test process, obtain spindle vibration acceleration under rotating speed 1000-4000rpm condition of three axis numerically controlled machine XH715 and milling cutter and frequency spectrum experimental data as shown in table 1, obtain spindle vibration acceleration under rotating speed 1000-12000rpm condition of five-axle number control machine tool UCP710 and milling cutter and frequency spectrum experimental data as shown in table 2.
Table 1 three axis numerically controlled machine XH715 and milling cutter idling vibration experimental data
Table 2 five-axle number control machine tool UCP710 and milling cutter idling vibration experimental data
As shown in Figures 2 to 4, the oscilating characteristic that the five-axle number control machine tool UCP710 obtained by table 2 and diameter 20mm high speed rose cutter dally as shown in Figures 5 to 7 for the oscilating characteristic that the three axis numerically controlled machine XH715 obtained by table 1 and diameter 20mm high speed rose cutter dally.By the three axis numerically controlled machine XH715 shown in table 1 and Fig. 2 to Fig. 4 and milling cutter security and stability test experiments result, there are two dominant frequency in the idling vibration of this lathe and milling cutter, be respectively 1500Hz and 2600Hz, along with rotating speed improves, main frequency of vibration along milling cutter feeding and milling width changes up and down round 1500Hz and 2600Hz, and presents erratic behavior along the main frequency of vibration in milling depth direction; Lathe and milling cutter vibration acceleration increase gradually along with the raising of rotating speed, undergo mutation, reach peak value when rotating speed reaches 3500rpm, and lathe and milling cutter produce intense vibration.This experimental result shows, adopt this lathe and diameter 20mmm high speed rose cutter Machining Hardened Steels, its safety and stability cutting rotational speeds is less than 3000rpm, in this range of speeds, can be effectively suppressed although centrifugal force causes milling cutter to vibrate, but milling cutter safety and stability cutting rotational speeds is too low, the requirement of high-efficient cutting hardened steel cannot be met.
By the five-axle number control machine tool UCP710 shown in table 2 and Fig. 5 to Fig. 7 and milling cutter security and stability test experiments result, this lathe and milling cutter idling vibration concentration of energy are at 3000-7000Hz, rotating speed increases to 3000rpm by 1000rpm, lathe and milling cutter vibration acceleration linearly increase, rotating speed is within the scope of 3000-10000rpm, vibration acceleration convergence is steady, when rotating speed increases to 10000-12000rpm, vibration acceleration along milling depth direction sharply reduces, and the vibration acceleration along feeding and milling width is then in plateau.Find, along with milling cutter rotating speed improves, milling cutter vibration acceleration amplitude of variation is less simultaneously.This experimental result shows, the centrifugal force vibration that lathe natural vibration characteristic and milling cutter error cause does not cause milling cutter security and stability to decline, and in this experiment range of speeds, this lathe dynamic property is that milling cutter efficient stable cutting of hardened steel provides guarantee.
Second step, hardened steel concave and convex surface stability of high-speed milling are tested:
Adopt two high speed rose cutters through security and stability test in the first step, to be parallel to the width of hardened steel concave and convex surface test specimen for cutting path, milling cutter rotating speed is determined by hardened steel stock-removing efficiency and finishing step requirement, feed speed, milling depth and milling width, on two lathes, hardened steel concave and convex surface test specimen is cut respectively, hardened steel concave and convex surface test specimen finished surface overall size is 100mm × 50mm, hardness is HRC55-60, the High Speed Milling Experiment measuring point of its finished surface curvature distribution and correspondence is as shown in table 3, in table 3, "+" is convex curvature radius, "-" is recessed radius of curvature.
The High Speed Milling Experiment measuring point of table 3 hardened steel test specimen finished surface curvature distribution and correspondence
In XH715 machine cut experiment, milling cutter rotating speed 3000rpm, feed speed 1800mm/min, milling width 0.3mm, milling depth 0.2mm; In UCP710 machine cut experiment, milling cutter rotating speed 8000rpm, feed speed 4000mm/min, milling width 0.3mm, milling depth 0.2mm, in these two kinds experiments, milling cutter all adopts upmilling mode and along the tool cutting path being parallel to hardened steel concave and convex surface specimen width 50mm direction (x to), vibration experiment result when the three axis numerically controlled machine XH715 obtained by cutting experiment and milling cutter are cut hardened steel convex surface is as shown in table 4, and the surface topography of the hardened steel convex surface test specimen cut as shown in Figure 8; Vibration experiment result when the five-axle number control machine tool UCP710 obtained and milling cutter cut hardened steel convex surface test specimen is as shown in table 5, and the surface topography of the hardened steel convex surface test specimen cut as shown in Figure 9; Vibration experiment result when the three axis numerically controlled machine XH715 obtained and milling cutter cut hardened steel concave curved surface test specimen is as shown in table 6, and the hardened steel concave curved surface milled surface topography cut as shown in Figure 10; The vibration experiment result that the five-axle number control machine tool UCP710 obtained and milling cutter cut hardened steel concave curved surface test specimen is as shown in table 7, and the surface topography of the hardened steel concave curved surface test specimen cut as shown in figure 11;
Table 4 lathe XH715 and milling cutter cutting of hardened steel convex surface vibration experiment result
Table 5 five-axle number control machine tool UCP710 and milling cutter cutting of hardened steel convex surface vibration experiment result
Table 6 three axis numerically controlled machine XH715 and milling cutter cutting of hardened steel concave curved surface vibration experiment result
Table 7 five-axle number control machine tool UCP710 and milling cutter cutting of hardened steel concave curved surface vibration experiment result
Can be found out to table 7 by table 4, under these experimental conditions, violent along milling cutter feed speed direction milling vibration, during milling hardened steel concave and convex surface test specimen, five-axle number control machine tool UCP710 shows similar vibration characteristics, and three axis numerically controlled machine XH715 vibration characteristics then exists notable difference; Can find out that the rotating speed that two lathes are suitable for is different with feed speed by Fig. 8 to Figure 11, and the difference of two lathes on milling vibration, make the milled surface topography of its milling hardened steel concave-convex curved surface obviously different.When wherein adopting three axis numerically controlled machine XH715 milling hardened steel convex surface test specimen, vibrational energy along feed speed and milling width all concentrates on 1322-2595.2Hz, 1859.1-3131.1Hz is concentrated on along milling depth direction vibrational energy, when adopting three axis numerically controlled machine XH715 cutting of hardened steel concave curved surface test specimen, vibrational energy along feed speed and milling width all concentrates on 2666Hz, and the vibrational energy along milling depth direction concentrates on 2041-2207Hz; When adopting five-axle number control machine tool UCP710 cutting of hardened steel convex surface test specimen, vibrational energy along feed speed direction all concentrates on 1508.8-1691.9Hz, vibrational energy along milling width all concentrates on 1691.9Hz, concentrates on 1330Hz along milling depth direction vibrational energy; When adopting five-axle number control machine tool UCP710 milling hardened steel concave curved surface test specimen, vibrational energy along feed speed and milling width all concentrates 1064-1691Hz, vibrational energy along 5 measuring points in milling depth direction concentrates on 1333Hz, and 1 measuring point vibrational energy concentrates on 1508Hz.
The process design method of the 3rd step, efficient stable milling hardened steel curved surface:
The experimental contrast analysis that foregoing and milling cutter dallied finds, when adopting three axis numerically controlled machine XH715 cutting of hardened steel concave-convex curved surface test specimen, vibration frequency when vibration frequency and milling cutter dally is basically identical, the dynamic property of machine tool chief axis directly determines the cutting state of high speed rose cutter Machining Hardened Steels curved surface, and affect by hardened steel concave-convex curved surface, machine tool chief axis vibration amplitude shows larger difference, with this understanding, the milled surface topography of the hardened steel concave and convex surface test specimen adopting identical Cutting Process to obtain respectively as shown in figs, the surface topography of visible two test specimens is obviously different, when adopting five-axle number control machine tool UCP710 cutting of hardened steel concave-convex curved surface test specimen, vibration frequency is starkly lower than vibration frequency during milling cutter idle running, and the change of hardened steel concave-convex curved surface test specimen to machine tool chief axis and milling cutter vibration effect little, with this understanding, as shown in figures 9 and 11, the surface topography of visible two test specimens is basically identical for the milled surface topography of the hardened steel concave and convex surface test specimen adopting identical Cutting Process to obtain.
Above-mentioned experimental result shows, when adopting identical milling cutter cutting of hardened steel concave-convex curved surface test specimen, the vibration characteristics of three axis numerically controlled machine XH715 self directly determines the milling state of hardened steel concave-convex curved surface test specimen, on five-axle number control machine tool UCP710, the milling state of hardened steel concave-convex curved surface test specimen then determines primarily of rotating speed and milling cutter performance, although by the impact that machine spindle speed increases substantially, the vibration amplitude of five-axle number control machine tool UCP710 milling hardened steel concave and convex surface test specimen is slightly larger than the milling vibration amplitude of three axis numerically controlled machine XH715, but its stock-removing efficiency comparatively three axis numerically controlled machine XH715 improves more than 1.2 times, and the milled surface topography of the hardened steel concave and convex surface test specimen of five-axle number control machine tool UCP710 cutting is consistent, therefore, adopt five-axle number control machine tool UCP710 Machining Hardened Steels concave and convex surface test specimen, its high-efficient cutting stability and machined surface quality are far above three axis numerically controlled machine XH715, so meet hardened steel concave and convex surface test specimen milled surface topography one make peace meet hardened steel high-speed cutting prerequisite under, five-axle number control machine tool UCP710 is the lathe meeting the requirement of efficient stable cutting of hardened steel.
Then require as design object with the working (machining) efficiency and milled surface topography that meet hardened steel concave and convex surface test specimen, determine the span of the milling cutter rotating speed of high-speed cutting hardened steel, feed speed, milling depth and milling width, concrete technology design process as shown in figure 12.
4th step, determine the process program of high-speed milling hardened steel punch-die:
According to the testing result of first three step, the milling cutter of this process program adopts the indexable high speed rose cutter of diameter 20mm two tooth, and lathe adopts five-axle number control machine tool UCP710.
Below with choose automobile internal covering part hardened steel punch-die carry out high-speed milling hardened steel concave and convex surface process certification experiment carry out comparative illustration to through the process program of detection method of the present invention determined efficient stable milling hardened steel punch-die and the process program of traditional efficient stable milling hardened steel punch-die.Wherein mold materials is the Cr12MoV hardened steel of hardness HRC55-60.
1, the former milling process scheme of automobile internal covering part hardened steel punch-die is: lathe adopts Milling Motion in Three-axes NC, and cutter adopts diameter 30mm two tooth soil layer hard alloy rotatable rose cutter, and adopts parallel cutting path to cut; Milling cutter rotating speed 4000rpm, feed speed 3000mm/min, milling width 0.3mm, milling depth 0.3mm; The milling cutter rotating speed of concave and convex surface small curvature radius turning processing is 2000rpm, feed speed 1000mm/min, milling width 0.3mm, milling depth 0.2mm.
2, the automobile internal covering part hardened steel punch-die high-speed milling technological design scheme obtained according to detection method of the present invention is: lathe adopts five-axle number control machine tool UCP710, cutter adopts diameter 20mm two tooth soil layer hard alloy rotatable rose cutter, and cutting path is identical with former process program; Cut punch-die milling width everywhere and be 0.3mm, milling depth is 0.2mm; The milling cutter rotating speed 5000rpm of cutting of hardened steel die, feed speed 4000mm/min, the milling cutter feed speed 2000mm/min of concave curved surface small curvature radius turning processing; The milling cutter rotating speed 6000rpm of cutting of hardened steel punch, feed speed 4800mm/min; The milling cutter feed speed 2000mm/min of convex surface small curvature radius turning processing.
Above-mentioned two kinds of process programs are adopted to carry out the experiment effect of high-speed milling hardened steel punch-die cutting stability to such as shown in table 8 and table 9, comparing result shows, compared with former process program, along under milling cutter feeding and milling width vibration amplitude reduction condition to some extent, large of hardened steel die processing stock-removing efficiency improves 33%, hardened steel punch stock-removing efficiency improves 60%, corner's stock-removing efficiency improves 100%, the surface roughness of the hardened steel punch-die that former milling process is processed is Ra3.2-6.3 μm, the surface roughness of the hardened steel punch-die that new milling process is processed is less than Ra1.6 μm, the high-efficient cutting stability of new technology scheme improves significantly, is therefore feasible according to the process program of detection method of the present invention determined high-speed milling hardened steel punch-die.
The new and old process ration of table 8 hardened steel punch cutting stability
The new and old process ration of table 9 hardened steel die cutting stability
Claims (4)
1. a detection method for hardened steel mould milling stability, is characterized in that comprising the following steps:
The first step, lathe and high-speed milling cutter security and stability are tested:
Two identical high speed rose cutters are arranged on respectively two different enterprising line spaces of lathe to turn, and on these two lathes, eddy current displacement sensor and ICP acceleration transducer are installed simultaneously, within the scope of the maximum speed that lathe allows, from rotating speed 1000rpm, each test increases rotating speed 500rpm and successively improves milling cutter rotating speed, until there is sudden change in machine tool chief axis vibration, meanwhile, the spectrum signal of machine tool chief axis under different rotating speeds and vibration acceleration signal is extracted by eddy current displacement sensor and ICP acceleration transducer, according to rotating speed during milling cutter idle running on the impact of machine tool chief axis main frequency of vibration and vibration acceleration amplitude, the rotating speed suddenlyd change to cause milling cutter vibration acceleration amplitude is as the critical speed of milling cutter security and stability, the maximum speed that when determining that milling cutter dallies, lathe and high-speed milling cutter safety and stability are cut, select each test simultaneously and can maintain stable idle running 3 minutes milling cutters without safety issue as the milling cutter meeting safety and stability cutting,
Second step, hardened steel concave and convex surface stability of high-speed milling are tested:
Adopt two high speed rose cutters through security and stability test in the first step, to be parallel to the cutting path in specimen width direction, milling cutter rotating speed, feed speed, milling depth and milling width is determined by hardened steel stock-removing efficiency and finishing step requirement, two lathes used in a first step respectively carry out cutting experiment to obtain the milled surface topography of hardened steel concave and convex surface test specimen to hardened steel concave and convex surface test specimen, obtains machine tool chief axis rumble spectrum and vibration acceleration signal by eddy current displacement sensor and ICP acceleration transducer simultaneously;
The process design method of the 3rd step, efficient stable milling hardened steel curved surface:
First the test result of the first step and second step is utilized, contrast lathe when milling cutter dallies and cutting of hardened steel concave and convex surface test specimen time, press along feed speed, the size of milling width and milling depth direction vibration frequency and vibration amplitude excursion, and the testing result of hardened steel concave and convex surface test specimen milled surface topography, lathe and milling cutter dynamic property matching are identified and evaluated, select the lathe meeting efficient stable cutting of hardened steel and require, then require as design object with the working (machining) efficiency and milled surface topography that meet hardened steel concave and convex surface test specimen, determine the milling cutter rotating speed of high-speed cutting hardened steel, feed speed, the span of milling depth and milling width,
4th step, determine the process program of high-speed milling hardened steel punch-die:
Utilize the lathe selected through milling cutter, the 3rd step of safety and stability test in the first step and cut through the practical work piece of span to hardened steel punch-die of the determined milling cutter rotating speed of the 3rd step, feed speed, milling depth, milling width.
2. the detection method of a kind of hardened steel mould milling stability as claimed in claim 1, it is characterized in that: in second step hardened steel convex surface test specimen in the width direction convex curvature radius be 200mm, be that 1170mm, 66mm are connected successively with three sections of convex surfaces of 1140mm by convex curvature radius along its length; Hardened steel concave curved surface test specimen in the width direction recessed radius of curvature is 200mm, is that 1140mm, 66mm are connected successively with three sections of concave curved surfaces of 1112mm along its length by recessed radius of curvature, hardened steel concave and convex surface specimen hardness HRC55 ~ 60.
3. the detection method of a kind of hardened steel mould milling stability as claimed in claim 1, is characterized in that: two lathes used in the first step are three axis numerically controlled machine XH715 and five-axle number control machine tool UCP710.
4. the detection method of a kind of hardened steel mould milling stability as claimed in claim 1, is characterized in that: milling cutter used in the first step is the indexable high speed rose cutter of diameter 20mm two tooth.
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| CN109759888A (en) * | 2019-02-28 | 2019-05-17 | 哈尔滨理工大学 | Steel mold of hardening splice region acoustic-electric mixing field milling attachment and control method is returned in advance |
| CN111375815A (en) * | 2020-04-16 | 2020-07-07 | 东莞市星品精密模具有限公司 | Method for processing mould by special-shaped plane |
| CN112382354A (en) * | 2020-11-27 | 2021-02-19 | 北京京航计算通讯研究所 | Cr12MoV material hardness prediction method and device |
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| CN105666250B (en) * | 2016-03-25 | 2018-03-30 | 哈尔滨理工大学 | A kind of detection method of turnery processing precision uniformity |
| CN109759888A (en) * | 2019-02-28 | 2019-05-17 | 哈尔滨理工大学 | Steel mold of hardening splice region acoustic-electric mixing field milling attachment and control method is returned in advance |
| CN109759888B (en) * | 2019-02-28 | 2020-11-27 | 哈尔滨理工大学 | Quenching steel die splicing area acoustic-electric mixed field milling device and pre-return control method |
| CN111375815A (en) * | 2020-04-16 | 2020-07-07 | 东莞市星品精密模具有限公司 | Method for processing mould by special-shaped plane |
| CN112382354A (en) * | 2020-11-27 | 2021-02-19 | 北京京航计算通讯研究所 | Cr12MoV material hardness prediction method and device |
| CN114707265A (en) * | 2022-03-30 | 2022-07-05 | 西南交通大学 | Method for extracting evaluation index of five-axis ball head milling surface texture morphology |
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