The design of jig of dimensional angle inclined hole is calculated

1 document label piles up: B article number: In the treatment that 1001-2265(1999)10-0046-031 foreword covers in diesel engine air cylinder, classics regular meeting encounters the treatment problem of dimensional angle inclined hole. In sheet below the situation that small lot produces, we put work on coordinate boring machine to pass normally adjust all-purpose tilt the method of the stage, the treatment of the inclined hole that finish. In the situation that batch produces, with respect to need design jig or boring clamping apparatus satisfy manufacturing need. Jig of glow plug aperture is built to be with air cylinder below exemple, to the design of jig of dimensional angle inclined hole train of thought and computation make a few specifications. The acquisition of 2 treatment position pursues 1 workpiece diagram is shown 1 times like the graph, workpiece locates with underside and 2-d. Go to the lavatory to discuss an issue for the purpose of, we are the axes abstraction of aperture general and linear, the dimensional diagram that gets 2 are shown pursueing. Linear MN is axes of glow plug aperture namely, o1O 3, O2 O4 sells aperture spool cotton for two fixed position respectively. Should adjust MN to the proper place that can machine (adjust MN namely for plumb line) , workpiece needs to rotate via two (the level rotates and tilt rotate) . Above all, be in MN planar R rotates along suitable hour hand α horn, write down for R ′ . Apparent, r ′ is a side vertical plane. Next, inside planar R ′ , MN edge anticlockwise rotate β horn, right now, MN turns into plumb line. Such, got machining the position. Apparent, according to above analysis, such we are OK thinking, the edge on the inclined plane that wants workpiece to be β in one banking angle only and the position of the horizontal horn that become α are placed, can get correct treatment seat. Graph 2 work are three-dimensional diagram the design of 3 clamping apparatus and computation pursue 3 jig 1.

Clamping apparatus body 2.

Backing plate 3.

Nut 4.

Pillar 5.

Bedspring 6.

Pressing plate 7.

Column of double head snail 8.

Gasket of nut, cone, spherical gasket 9.

Lozenge is sold 10.

Jig board backing plate 11.

Can change auger set 12.

Get a bolt 13.

Lining 14.

The circle is sold 15.

Establish an arm 16.

Axis of rotation 17.

Fixed position is sold 18.

Bolt 19.

Jig board 20.

Bolt 　 is analysed according to above, we designed the jig that the graph shows 3 times. This jig is jig of cover board type, use one side two sell clamp of orgnaization of clamp of pressing plate of fixed position, bolt. Jig board 19 through axis of rotation 16 can getting pattern plate backing plate 10 change trains are moved, jig board backing plate 10 sell through fixed position 17, bolt 18 fixed in establish an arm 15 on, establish an arm 15 be sold through fixed position and bolt is fixed in clamping apparatus body 1 on. Well-known, when machining dimensional angle inclined hole, the fixed position of workpiece is adjusted, craft calculation is more complex, make mistake extremely easily. Accordingly, be machined to go to the lavatory and assure to assemble precision, pattern plate and clamping apparatus body are gotten to undertake assorted machining after assembling. Such, need gives opening of 2-d １ craft in the treatment on clamping apparatus body (its axes and wait for) of coincide of treatment aperture axes, search as what combination adds man-hour fiducial aperture and to knife craft aperture (4) seeing a picture. Such, avoided to get the multifarious space between an axes and axes of fixed position aperture to calculate. The key of the problem the design computation of body of translate into clamping apparatus. The design computation of clamping apparatus body includes the following two respects: Graph the 　 of aperture of 2-d １ craft on body of 4 clamping apparatus (1) craft Konghe fixed position sells the positional measure between Kong Zhi the computation of L １ ′ , L2 ′ . (2) is the treatment of facilitating craft aperture, still need consideration the distance A between the umbriferous horn θ inside horizontal and two craft aperture is in two craft Kong Lianxian the ′ of umbriferous distance A inside horizontal. 3.

The computation of the ′ of １ of computational 　 L of ′ of １ of 1 　 L, L2 ′ , L2 ′ sees a picture 5. Double dot is underlined express backing plate, ply is H. In △ ENN ′ , h of NN ′ ＝ , β of ＝ of ∠ ENN ′ , 　 of β of Htg of ＝ of β of Tg of ′ of NN of ＝ of ∴ EN ′ is in △ EFN ′ , α of ＝ of EF of ∠ N ′ , α of Cos of β of Htg of ＝ of α of Cos of ′ of EF ＝ EN, １ of F of ′ of N of ＝ of １ of FF of ＝ of ′ of L2 of 　 of 　 of １ of L of ＋ of α of Cos of β of Htg of 　 of 　 of ＝ of FG of ＋ of EF of ＝ of EG of ＝ of ′ of １ of L of ∴ of 　 of 　 of α of Sin of β of Htg of ＝ of α of Sin of ′ of EN of ＝ of N ′ F - N ′ F ＝ .

The computation of the computational 　 θ of 2 　 θ and A ′ and A ′ sees a picture 6. AB states two craft aperture is in those who place specific cant to go up to connect a line, the distance is A. DB is in for AB inside horizontal umbriferous, the distance is A ′ . BC is those who place specific cant and horizontal to cross a line, criterion α of ∠ ABC ＝ . Line crossing AD makes the vertical plane ACD of BC, criterion β of ∠ ACD ＝ . Graph the computation that 6 craft aperture machines is in △ ABC, α of ∠ ABC ＝ , 90 ° of ∠ ACB ＝ , 　 of α of AC ＝ BCtg is in △ ACD, β of ∠ ACD ＝ , 90 ° of ∠ ADC ＝ , 　 of β of DC ＝ ACcos is in △ BCD, 90 ° of ∠ BCD ＝ β of Cos of α of Tg of ＝ of BC of ／ of β of ACcos of ＝ of BC of ／ of DC of ＝ of θ of Tg of 　 　 ∴ , θ ＝ Arctg (β of Tg α Cos) 　 is same, we can get δ ＝ Arcsin (β of Sin α Sin) 　 of δ of Acos of ＝ of δ of ABcos of ＝ of BD of ＝ of ′ of A of 　 　 ∴ is in actual production, of dimensional angle inclined hole tilt direction can be divided for 4 kinds of types. Tilt in the light of what differ direction, can give different dimensional sketch according to the picture of train of thought of above, derivation gives different computational formula. 4 ends radical occupies the fixture that above train of thought designs, avoided the complex dimensional angle conversion of other design method, get better treatment craft sex. This clamping apparatus already the application that aborning receives succeeding. When the precision demand of inclined hole of the angle between high above in the sky is higher, OK still take out establishs arm and jig board, search with aperture of 2-d １ craft, in the treatment on coordinate boring machine or machining center. In the treatment respect of dimensional angle inclined hole, the design train of thought of above and computational method can yet be regarded as a kind of handy and reliable good method. CNC Milling CNC Machining