Txhawm rau txhawm rau ua kom zoo dua tus qauv ntawm lub teeb pom kev zoo hauv kev tsim khoom tiag tiag, kom tshem tawm qhov cuam tshuam ntawm kev tso chaw dhau ntawm qhov raug ntawm qhov ua haujlwm thiab kom txo tus nqi tsim khoom, kev teeb tsa tsim rau iav hloov ntawm cov khoom seem tau ua kom zoo dua. Cov txiaj ntsig tau ua pov thawj tias txoj hauv kev tuaj yeem ua tau.


1 Cov lus qhia ua ntej
Hauvmachining, teeb tsasfeem ntau yog siv rau txoj haujlwm thiab clamp cov haujlwm ua haujlwm. Hauv kev tsim khoom loj, txhawm rau kom luv sijhawm txheej txheem, txhim kho kev tsim khoom kom zoo, thiab tib lub sijhawm txo kev siv zog ntawm tus neeg teb xov tooj, ntau yam tshwj xeeb jigs tau siv dav. Peb YKH5132H CNC iav shaping tshuab yog lub tshuab ua haujlwm siab CNC tshuab tshwj xeeb uas tsim los rau tsheb, txo qis thiab kev lag luam tub rog. Qee cov neeg siv pom tias thaum siv lub cuab yeej siv lub tshuab los ua ib hom tsheb sib tsoo lub cev (saib daim duab 1), kev ua haujlwm raug feem ntau zoo li tsis zoo. Tom qab kev sib txuas lus nrog tus neeg siv, nws tau pom tias qhov teeb meem ntawm tus neeg siv khoom nkag tsis tau. Hauv qhov ntsuas qhov ntsuas mus rau qhov ua haujlwm nyob rau sab saum toj thiab hauv qab ntawm lub qhov rooj saum toj kawg nkaus, cov haujlwm tau raug kaw ib feem ntawm qhov raug tshaj qhov tsis zoo, tab sis vim tias txheej txheem sab saud tsis tuaj yeem txhim kho, cov khoom siv raug tuaj yeem tsis tuaj yeem txhim kho, yog li peb tsuas tuaj yeem xav los ntawm cov txheej txheem ntawm qhov kev txiav txim no, uas yog, lub iav tso cov khoom siv txhawm rau txhawm rau txhim kho kev tsim qauv. Tam sim no, vim yog teeb meem ntawm qhov tsis raug, qhov seem yog siab thaum ua cov txheej txheem ntawm cov khoom siv uas twb muaj lawm, uas cuam tshuam rau cov khoom lag luam zoo. Vim li no, cov neeg siv khoom nug peb lub tuam txhab txhawm rau txhim kho cov khoom siv uas twb muaj lawm. Hauv kev teb rau qhov xwm txheej no, cov khoom siv uas twb muaj lawm tau zoo dua qub, uas txo qis seem seem thiab ua kom muaj kev tsim khoom ib txwm muaj.

 
Daim duab 1 Automotive kis tau tus mob iav ncej



2 Teeb Meem Qhia

Hauvorder to solve the problem of high scrap rate of nws pib kis tau tus mob iavncej ua los ntawm YKH5132H CNC iav shaping tshuab, ua ntej, peb tau tshuaj xyuas peb tus kheej cov cuab yeej thiab tshuaj xyuas qhov nqes hav ntawm txoj hlua khawm, qhov chaw qis dua, nruab nrab qhov nruab nrab ntawm cov tailstock thiab cov cuab yeej nrog rau feem pua ​​cov lus, thiab tsis muaj teeb meem pom. Thaum lub caij nplooj ntoo hlav rub los nqes mus rau sab nrauv ntawm lub chaw ua haujlwm, rub lub zog ntawm lub tog raj kheej qis yog loj dhau, yog li lub caij nplooj ntoo hlav chuck yuav deform cov haujlwm thiab qhov qis hauv qhov chaw ntawm lub cev ua haujlwm raug yuam kom rub tawm. ntawm kev sib dhos, yog li qhov chaw nruab nrab sab saud thiab qis tsis nyob ntawm tib lub axis.

Yog tias kev txhim kho cov hniav tau ua tiav lub sijhawm no, tom qab ua haujlwm tawm ntawm lub teeb, lub tshuab ua haujlwm nws tus kheej deforms thiab rov pib dua, thiab thaum lub qhov sab saud thiab qis sab saum toj raug tshuaj xyuas cov hniav kom raug, qhov kev tshuaj xyuas tsis zoo ib yam nrog kev ua siv lub xeev, uas ua rau qhov tseeb ntawm kev tshuaj xyuas kom dhau tus txheej txheem thiab tsim khoom seem.



3 thawj cov qauv teeb tsa kev tshuaj xyuas thiab kev ua kom zoo dua qub

Hauvthe original teeb tsa, txoj hlua khi qis txuas nrog lub tog raj kheej hydraulic ntawm lub cuab yeej siv tshuab, thiab tom qab lub tog raj kheej hydraulic pib ua haujlwm, qis khi bar txav mus rau hauv, tsav lub tes tsho sib txuas thiab khi sab saud, thiab sab laug khi txoj hlua tsav lub caij nplooj ntoo hlav dhau ntawm lub tes tsho hloov pauv. Cov nplaim hluav taws ntawm lub caij nplooj ntoo hlav thiab lub ntsej muag sib sib zog nqus ntawm lub tes tsho sib koom ua ke los tsim lub zog ib puag ncig mus rau qhov sib sib zog nqus ntawm lub tes tsho, thiab zoo li no, lub tes tsho sib dhos ua rau lub zog sib zog ua kom lub zog tawg rau lub caij nplooj ntoo hlav, compresses lub caij nplooj ntoos hlav chuck thiab clamps sab nraum lub voj voog ntawm cov ua haujlwm.

Qhov tsis zoo ntawm qhov qub teeb tsa structure (see Figure 2) is that since the taper sleeve itself is coaxial with the outer surface, the collet plays the role of both positioning and clamping during the contraction process, and the teeb tsa and the tailstock have formed the positioning of the upper and lower tops, so the teeb tsa structure is an over-positioning structure. This structure requires high ua haujlwmaccuracy for the positioning and clamping parts of the workpiece itself, which can easily cause ua haujlwmaccuracy to exceed the standard and make the part scrap, which is also the case in practice. Considering the above problems, the teeb tsa structure must be optimized and the clamping and positioning method must be improved.

 
Figure 2 Original teeb tsa structure
1 - qhov chaw qis dua 2 - qhov chaw siab dua 3 - lub tes tsho taper 4 - txoj hlua khawm 5 - lub tes tsho txuas 6 - txoj hlua khi sab saum toj 7 - sib koom ua ke 8 -Lub khi khi



4 New teeb tsa structure scheme
Xav tias lub qhov saum toj kawg nkaus ntawm qhov ib sab yog ib qhoua haujlwmreference for finishing, the optimized design of the teeb tsa structure needs to remove the positioning function of the collet chuck and only retain the clamping function. The original taper sleeve is changed into a split structure, so that the taper part and the lower center positioning hole part are separated. And keep the clearance between the outer circle of the improved taper sleeve and the inner hole of the chip stopper cover about 0.2mm. In this way, the improved taper sleeve is actually floating (hereinafter called floating taper sleeve) and has the effect of adaptive centering. When the spring-loaded chuck moves downward, the chuck head is shrunk while being influenced by the geometric tolerance of the floating taper sleeve and the workpiece outer circle, the chuck head will adaptively produce a corresponding offset according to the deviation of the workpiece outer circle relative to the top hole, while clamping the workpiece outer circle to achieve the purpose of clamping only and not positioning. The structure of the new teeb tsa is shown in Figure 3.

 
Figure 3 New teeb tsa structure
1-Txuas lub tes tsho 2-Clip stopper 3-Floating taper sleeve 4-Spring chuck 5-Lower center

The teeb tsa design should avoid over-positioning as much as possible, except in high precision requirements or special machining. In this case, the original teeb tsa not only has high manufacturing cost, but also requires high accuracy for the workpiece itself, which in effect increases the ua haujlwmcost of the workpiece and brings unnecessary ua haujlwmhazards.



5 Xaus

Hauvthe original teeb tsa design, txawm hais tias lub hauv paus ntsiab lus ntawm datum coincidence thiab datum kev koom ua ke tau ua raws, thiab dhau qhov chaw yog tsim los rau lub hom phiaj ntawmhigh-precision machining, the design does not take into account the problem that the workpiece's own accuracy cannot meet the over-positioning requirement through practical testing, and over-positioning plays a negative role instead. By optimizing the original teeb tsa, the over-positioning was eliminated and the positioning and clamping functions were separated to ensure the quality of the workpiece, while the teeb tsa was easier to make. At present, the improved teeb tsa has been used in the mass production of transmission gear shafts. Practice shows that the accuracy of the parts machined with the improved teeb tsa is stable and the scrap rate is greatly reduced compared with that before the improvement, which improves product quality and ensures normal production.