The type selecting that PMI linear slideway amounts to in is calculated

Type choice is current the manufacturer home of linear slideway on the market is very much, the model of each manufacturer names and the type differs somewhat. The linear slideway type that PMI amounts to in is more all ready, basically can cover all demand on the market completely, its main type has self-regulated heart carry on one's shoulder of heavy burden of whole steel ball (whole steel ball of MSA) , self-regulated heart is low assemble model (MSB) , complete stainless steel is little model (carry on one's shoulder of heavy burden of MSC) , complete roller (ball bearing of MSR) , Jing Yin (. The type selecting of linear slideway basically is the slideway characteristic with different basis and design ask to undertake choosing, PMI linear slideway can consult according to use experience express 1 choice. Express 1 medium amount to PMI linear slideway main type and applicable equipment type are applicable equipment type is applicable carry on one's shoulder of heavy burden of whole steel ball of equipment self-regulated heart (carry on one's shoulder of heavy burden of complete roller of machine tool of MSA) numerical control (whole steel ball of heart of self-regulated of equipment of electric spark of equipment of MSR) dragon door is low assemble model. Complete stainless steel of medical apparatus and instruments of robot of numerical control machine tool industry is little model (MSC) detects carry on one's shoulder of heavy burden of column of Jing Yin steel of machine medical apparatus and instruments (SMR) . 　 of equipment of electric spark of dragon door equipment 2.

Precision chooses the precision of linear slideway to include: 1.

Walk parallelism (dynamic precision) . Include range of slide block C (on the surface) face of A of relatively slippery course (underside) walk parallelism, face of slide block D (datum plane of slide block side) face of B of relatively slippery course (datum plane of slippery course side) walk parallelism. 2.

Geometrical dimension precision. The measure that includes high H is concessional error, the didymous and mutual difference of high H (the dimension of W2 of △ H) , width is concessional the didymous and mutual error of W2 of error, width (△ W2) . Precision is specific the meaning pursues as follows 1. Graph the accuracy class of precision sketch map of 1 linear slideway is according to the concessional limits cent of the error: Average level (N) , advanced (H) , exact form (P) , exceed exact level (class of nicety of SP) , freeboard (UP) , the concessional error value of specific corresponding grade correspondence can consult the relevant example manual of PMI. Give out according to general use experience the grade choice of numerical control machine tool is referenced. If express,2 are shown. Express accuracy class of 2 linear slideway 　 of 　 of X/YP/P&H/H of line cut of X/YP/H of stage of cross of numerical control of X/Y/ZH/H/H&N/N/N of general accuracy machine tool of X/Y/ZH/H/H&N/N/N of engraving tool of numerical control of X/ZP/P&H/H of lathe of numerical control of X/Y/ZSP/P /H of machine tool of electric spark of X/Y/ZSP/P/P of grinder of numerical control of X/Y/ZSP/P /P of milling machine of boring of numerical control of accuracy class of coordinate of machine tool of type of machine tool of accuracy class of coordinate of machine tool of type of machine tool of reference of type of machine tool of applicable numerical control 3.

The linear slideway that computation of slide block load makes a stage use 4 slide block more in general facility go to work will bear the weight of the level moves, if the graph is shown 2 times,the load of workbench level motion that 4 slide block bear the weight of gets force case. Graph the case getting power that if still have other kind,load of motion of level of workbench of 2 slide block gets strive, can consult the computational legend in PMI example manual explains. 4.

What control social estate beforehand is affirmatory beforehand the rigid size that the size of pressure decided slideway, can eliminate certain slide block bottom clearance at the same time, the tigidity of linear slideway when the experiment proves the effect that presses beforehand can rise to was not pressed beforehand 2. 8 times. The linear slideway of PMI presses grade cent to be beforehand: Press gently beforehand (FC) , press beforehand in (F0) , press beforehand again (F1) , overweight to be pressed beforehand (F2) 4 grade. Correct make choice of is linear of slideway beforehand pressure has very big effect to the tigidity of equipment. Give out according to general use experience watch of 3 press grade reference beforehand. Watch 3 press grade use condition and applied industry reference to press grade use condition to apply an industry to be pressed gently beforehand beforehand beforehand (FC) precision demand is not high, press beforehand in machine of mill of carve of machine of job of slip obstruction miscarriage, woodworker, numerical control (F0) equipment of electron of odd axis, cantilever, high accuracy, measure equipment, linear robot to be pressed beforehand again (F1) impact is sex of big, Gao Gang, high load.

The life L basis that asks to choose linear slideway according to life is borne actually load differs somewhat, can mix according to the C of basic and rated dynamic load of slide block commonly computative service life of working load P, the service life of linear slideway is met of the hardness as face of use movement condition, scroll and environmental temperature and change, according to type of circular scroll form, choose a plan the ball bearing of 3 / steel column is linear slideway life formula: Graph 3 ball bearing / steel column is linear FH of coefficient of hardness of ⑴ of 　 of slideway life formula. The scroll face hardness of linear slideway must be HRC58 ～ 64, hardness crosses small conference to reduce the bear capacity of linear slideway, right now basic and rated move, dead load is multiplied respectively with hardness coefficient FH, the hardness of PMI linear slideway that leave factory is HRC58 above, reason this FH=1.

0. Graph temperature coefficient FT of ⑵ of 　 of 　 of FH of 4 hardness coefficient. Effect of the high temperature when 100 ℃ can affect prep above of temperature of linear slideway use environment its life, right now basic and rated move, dead load is multiplied respectively with opposite temperature coefficient FT. The fittings of part of PMI linear slideway is plastic products, environmental temperature cannot prep above 100 ℃ . Graph Fw of coefficient of bear of ⑶ of 　 of 　 of FT of 5 temperature coefficient. Linear slideway slideway is actual in using, accompanying mostly shake or pound, be in considering different locomotive condition with use speed, get according to experience bear coefficient is divided with C of basic and rated dynamic load. If the watch is shown 4 times,experience takes a cost. The measured value that expresses experience of Fw of 4 bear coefficient to take the concussion that be worth a watch and oscillatory speed vibration (when G)fW does not have exterior concussion and oscillatory low speed: V£15m/min comparatives G is worth £0.

51.

0 ～ 1.

5 when doing not have particularly clear impact and oscillatory middling speed: 150.

51.

5 ～ 2.

When 0 have exterior concussion and oscillatory high speed: V>60m/min1.

02.

0 ～ 3.

5 　 　 6.

At present PMI uses foundation of computational application example platform of simple and easy work is some client a specification. MSA25E2SSF0+R900NII 　 is basic and rated dynamic load: C=28.

1kN 　 is basic and rated dead load: C0=42.

4kN pursues 6 some clients are simple and easy working platform among them: Is water of ground of; L6=100 　 of ㎜ of; L3=0; L4=0; L5=45 of; L2=400 ㎜ of; L1=500 ㎜ of M1=100 ㎏; M2=300 ㎏ equal fast can use campaign formula get 4 slide block bear is load equal: ?  1=P2=P3=P4=(500+400) × 9.

Ground of 　 of 8 ÷ 4=2205N is common operating mode condition, is choice other parameter as follows: ?  H=1 FT=1 Fw=1.

Do 2 　 rise integratedly so the life: of slide block?  =[(1/1.

2) × (28100/2205)]3 × 50=(0.

84 × 12.

75)3 × 50=61427km CNC Milling CNC Machining