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Info Letter No. 56 - July/August 1999

Copyright by HEXAGON Software 1999

by Fritz Ruoss


GEO2

The new GEO2 software calculates the mass inertia moment of any axially symmetrical cross-section. The dimension is input as straight lines and arcs in half-section. You can also load the geometry from a CAD DXF file, if the contour is defined as a poly-line with straight lines and arcs. A table drawing with all data can be printed or taken over to CAD as a DXF/IGES file.


 

GEO3

GEO3 is a new software for calculation of Hertz’s pressings between 2 touching bodies (ball, cylinder, circle geometry with variable radiuses in x and y plane, planes).

GEO3 draws diagrams of pressure tension, deformation and spring rate depending on the compression load.


 

SR1 – shearing stress

When tightening a bolted connection a shearing stress appears because of thread traction and screw lead. This stress partly remains in the operating state. The "Calculation of service condition Sigma red,B" has been taken over from the new VDI 2230 draft. With shearing stress and maximum tensile stress in operating state, a comparative tension Sigma red,B is calculated.

Sigma red,B = (sigma²z + 3 (ktau*taumax)²)0.5

In this expression, the reduction constant k tau stands for the remaining shearing stress in operating state. VDI 2230 suggests k tau=0.5. The ideal case k tau=0 is reached at hydraulically prestressed tightening, if clamping plates are pressed together when mounting and the screw is tightened with a minor torque. If the total shearing stress remained,
k tau = 1 would apply. In SR1, the tightening tools’ database was appended by K_TAU. Therefore, the field STREU_PROZ containing the variance in per cent is tropped, because it can be calculated with alpha A.

 

Shearing stress calculation:

Tau max = MG/Wp

With

MG = FMmax*d2/2(P/(pi*d2)+1.155*µg)

WP = pi/16 * d0³ for elastic deformation

bis WP = pi/12 * d0³ for full plastic deformation

A bit strange about the VDI 2230 draft is that the polar surface inertia moment with WP=pi/12*d³ is used for full plastic deformation when the shearing stress is calculated with MG, as the friction moment surely results in full plastic transformation only in few cases. Therefore, SR1 calculates the higher shearing stress for elastic transformation, and the permissible flowing is considered by a minor shearing stress’s influence when calculating the (theoretical) comparative tension (factor 12/16=0.75).

Sigma red,B = (sigma²z + 3 (ktau*taumax*0.75)²)0.5

Or

Sigma red,B = (sigma²z + 1.69 (ktau*taumax)²)0.5

For a factor ktau=0.5 (suggestion VDI2230) follows

Sigma red,B = (sigma²z + 0.42 taumax²)0.5

The shearing stress is nearly insignificant.


 

VDI 2230 Application example

Unfortunately there is only one application example in the new VDI draft, this corresponds to example 3 of the old standard. Only the screw’s thread length was doubled from 10 to 20 mm. SR1 calculates a minimum screwing-in depth of 12.4 mm according to Dose’s expressions. In the new draft, the up-to-now incorrect calculation of the screwing-in depth has not been replaced by the practical Dose calculation, but by annother new theory.

The amount of setting calculation (so far dependant on the clamping length!) has been replaced, now roughly corresponding to Bauer & Schaurte’s methods used by SR1. In the calculation example, the setting force is now 4 times as large as according to the old VDI2230 !


 

SR1 – Temperature-dependent Nut

For the screwing-in depth’s calculation at higher temperatures, the reduction of yield point and tensile stress of the nut thread has to be considered. Therefore, SR1 has been appended by a database MAT_P_RE.DBF. Similar to the screw’s yield point calculation, the yield point of the specified operating temperature is loaded from the database for the nut. Intermediate values are interpolated.

The tensile strength is diverted from the yield point, it is preconditioned that the relation of yield point and tensile strength is the same for every temperature.

Rmx = Rex * Rm20 / Re20


 

SR1 – amount of setting acc. VDI2230 draft 11/98

The amount of setting calculation according to the new VDI draft was taken over in SR1. Now, you can choose the calculation according to the old and the new VDI, and the screw’s Vademecum. The calculation according to Vademecum had to be corrected, as the number of discretionary hyphens had not been considered yet.

 


SR1 - Input clamping plates

In the latest 32-bit version, problems appeared for 2 and more clamping plates at material changes, when the file was saved and later opened. The error was corrected, moreover, the material are now also shown in the list.


 

SR1 – Table Drawing

As size problems occurred with long texts and large numbers, the font height was decreased and the columns were widened.


 

SR1 – Friction Diameter

The friction diameter is calculated according to VDI 2230 with

Dkm=(dw+dh)/2

So far, the expression Dkm = (dk+dh) / 2 with head diameter Dk has been utilized. Therefor, the tightening torque was smaller.


 

SR1+ Plus-Version with flange calculation

An extended version of SR1 is available now, which includes the calculation of the maximum load for a single bolt (FA, FQ, Fkreq) from the flange load. Thanks to Mr. Gerhard Friedrich Dose for his suggestions and help.

 

The price of SR1+ is 1470 DM, the upgrade price for SR1 to SR1+ is 280 DM.


 

GEO1/GEO1+ Drawing

A table drawing with geometry and result data for the calculated cross-section has been added to GEO1, our profile calculation software.


WST1 – Database

The database has been appended. Approximately 250 steels and alloys, respectively, and the following material groups have been added: Heat-resisting steel, High-temperature resisting steel/alloy, alloyed tool steel, non-magnetiziable steel, vavle steel, heat-resisting cast steel, stainless steel cast.

Following material's chemical compound has been corrected:

1.0402, 1.0406, 1.0501, 1.0503, 1.0511, 1.0528, 1.0535, 1.0540, 1.0601, 1.0756, 1.0757, 1.0758, 1.1133, 1.1151, 1.1158, 1.1167, 1.1170, 1.1178, 1.1181, 1.1186, 1.1191, 1.1203, 1.1206, 1.1221, 1.1231, 1.1248, 1.1269, 1.1520, 1.1525, 1.2362, 1.2731, 1.3505, 1.3520, 1.3536, 1.3543, 1.3549, 1.3551, 1.4003, 1.4109, 1.4110, 1.4112, 1.4120, 1.4122, 1.4125, 1.4306, 1.4310, 1.4311, 1.4313, 1.4404, 1.4418, 1.4439, 1.4462, 1.4465, 1.4512, 1.4521, 1.5023, 1.5024, 1.5028, 1.5142, 1.5637, 1.5662, 1.5680, 1.5752, 1.5919, 1.6511, 1.6582, 1.7001, 1.7002, 1.7003, 1.7006, 1.7020, 1.7030, 1.7033, 1.7035, 1.7108, 1.7138, 1.7149, 1.7218, 1.7220, 1.7225, 1.7228, 1.7321, 1.7323, 1.7361, 1.7362, 1.7707, 1.7735, 1.7779, 1.8159

The basis data of 1.7220 has been altered.


 

WST1 - Max. and Min. Stress

Instead of average stress and amplitude, min. and max. value may be entered.


WST1 - Materials new/modify

Base data, chemical composition, fatigue limits, and international names may be entered in one dialogue window.


 

FED3 Production drawing

Spring angle and torque have been splitted to 2 lines, text size was increased, and dimension arrows are drawn solid filled. Thanks to Mr. Rottmann of Baumann-springs in Rüti/Switzerland for his improvement suggestions.


 

Minus becomes Light

Because of the negative touch of the "-" sign for the light versions, it are named with extension "light" instead of "minus" in future.


 

Text Printout – without header

If only one page shall be printed, you can configure this setting. The page shift is ignored then.


Font and text style configuration

For text printout, font, style and size can be configured now.

For the text font used with drawings and diagrams, "bold" and "italic" attributes are supported now.


Standard Printout from FED3+

Font: Courier New

Style: Bold Italic


PRICELIST OF 01st.09.1999

PRODUCT

EURO

DM

US $

GEO1 V3.0 Cross-Section Calculation

230,-

450,-

$265

GEO1+ V3.0 Cross-Section Calculation incl.profile database

294.-

575,-

$330

GEO2 V1.0 Moment of Inertia

194,-

380,-

$220

GEO3 V1.0 Hertzian Pressure

132,-

260,-

$150

SR1 V9.2 Bolted Joints

639,-

1.250,-

$730

SR1+ V9.2 Bolted Joints incl. Flange calculation

750,-

1.470,-

$858

LG1 V4.7 Roll-Contact Bearing Calculation

296,-

580,-

$340

WST1 V6.3 Material Databese

235,-

460,-

$270

WN1 Version 7.3 Press fits

485,-

950,-

$550

WN1light V7.3 Press fits

368,-

720,-

$420

WN2 V 3.2 Toothed shaft joints

250,-

490,-

$290

WN3 V 2.2 Sliding keys

245,-

480,-

$280

WL1 V 13.5 Shaft Calculation

798,-

1.560,-

$910

WL1+ V13.5 Shaft Calculation incl. roll-contact bearings

945,-

1.850,-

$1080

ZAR1 V 13.6 Spur and Helical Gears

1002,-

1.960,-

$1150

ZAR1+ V 13.6 Spur and Helical Gears incl. Database

1115,-

2.180,-

$1280

ZAR2 V4.5 Spiral Bevel Gears

792,-

1.550,-

$910

ZAR3 V3.3 Worm Gears

404,-

790,-

$460

ZARXE V3.0 Addend.modific.from dimension over balls, pins, span, meas

72,-

140,-

$85

HAERTE V2.0 Vickers, Brinell, Rockwell hardness

61,-

120,-

$70

FED1 Version 15.3 Calc.of Helic. Compression Springs

491,-

960,-

$560

FED1+ V15.3 Helical. Compression Springs incl. Database, Animation

695,-

1.360,-

$800

FED1light V15.3 Calc.of Helic. Compression Springs (without CAD-interface.)

404,-

790,-

$460

FED2 V 9.4 Calc.of Helical. Tension Springs

501,-

980,-

$580

FED2+ V 9.4 Helical. Tension Springs incl, Database, Animation

675,-

1.320,-

$770

FED2light V9.4 Calc.of Helic. Tension Springs (without CAD-interface.)

407,-

795,-

$465

FED3 Version 8.5 Helical Torsion Springs

388,-

760,-

$450

FED3+ V8.5 Helical Torsion Springs incl.prod.drawing

480,-

940,-

$550

FED4 Version 2.9 Calc.of Disk Springs

430,-

840,-

$490

FED4- V2.9 Calc.of Disk Springs (without CAD-interface.)

394,-

770,-

$450

FED5 Version 7.3 Conical Compression Springs

741,-

1.450,-

$850

FED6 Version 5.8 Nonlinear Cyl. Compression Springs

634,-

1.240,-

$720

FED7 Version 3.7 Nonlinear Compression Springs

660,-

1.290,-

$760

FED7- Version 3.7 Nonlinear Compression Springs

402,-

785,-

$460

FED8 Version 2.7 Torsion Bar Calculation

317,-

620,-

$365

TOL1 Version 9.1 Tolerance Analysis

506,-

990,-

$580

TOL1CON V1.2 Conversion Programm for TOL1

281,-

550,-

$320

TOL2 Version 1.3 Tolerance Analysis

495,-

970,-

$570

TOLPASS V2.3 Library for ISO tolerances

107,-

210,-

$140

DXF-Manager Version 8.2

383,-

750,-

$440

HPGL-Manager Version 8.2

383,-

750,-

$440

DXFPLOT V 2.6

123,-

240,-

$140

SISI V3.0 Conversion of SI Units

56,-

110,-

$60

AV1 V1.3 File management

286,-

560,-

$325

TR1 V1.6 Girder Calculation

757,-

1.480,-

$870

ZM1.V1.0 Chain Gear Calculation

326,-

640,-

$370

 

PACKAGES

EURO

DM

US $

HEXAGON-Mechanical Engineering Package (TOL1, ZAR1+, ZAR2, ZAR3, WL1+, WN1, WN2, WN3, WST1, SR1, FED1,+, FED2+, FED3+, FED4; ZARXE, HAERTE, TOLPASS, LG1, DXFPLOT, SISI, GEO1+, TOL2, TOL1CON, GEO2, GEO3, ZM1)

7.453,-

14.600,-

$8100

HEXAGON Graphic Package (DXF-Manager, HPGL-Manager, DXFPLOT, HPGLVIEW)

741,-

1.450,-

$850

HEXAGON Helical Spring Package (FED1+, FED2+, FED3+, FED5, FED6, FED7, DXFPLOT)

2.550,-

4.990,-

$2890

HEXAGON Tolerance Package (TOL1, TOL1CON, TOL2, TOLPASS)

945,-

1.850,-

$1080

HEXAGON Complete Package (All Programs of Engineering Package, Graphics Package, Tolerance Package and Helical Spring Package)

9800,-

19200,-

$10650

 

HEXAGON Industriesoftware GmbH Tel.07021 / 59578

Stiegelstrasse 8 D-73230 Kirchheim-Teck Fax 07021 / 59986

E-Mail : Sales@hexagon.de Internet : http: // www.hexagon.de

Am Licenses

2

3

4

5

6

7

8

9

>9

Discount %

25%

27.5%

30%

32.5%

35%

37.5%

40%

42.5%

45%

 

 

Am Licenses

1

2

3

4

5

6

7..8

9..11

>11

Discount/Add.cost

-50%

-25%

0%

10%

15%

20%

25%

30%

35%

(Negative Discount means additional cost)

 

 

- English : all Programs

- French: FED1, FED1+, FED2, FED2+, FED3, FED3+, FED5, FED6, FED7, DXFPLOT, HPGLMAN, DXFMAN, HPGLVIEW.

- Italienish: FED1, FED1+, FED2, FED2+, FED3, FED3+, FED5, FED6, FED7, DXFPLOT.

- Schwedish: FED1, FED1+, FED2, FED2+, FED3, FED3+, FED5, FED6, FED7, DXFPLOT.

- Portugiesish: FED1, FED1+

 

 

Every eight weeks we send E-Mails to our customers with informations about news and up-dates of HEXAGON Software

Up-date prices

EURO

DM

US$

Disk-Update

31,-

60,-

$35

Full-Update (Disk+Manual)

51,-

100,-

$55

 

 

 

Hexagon offers two kinds of network license:

  1. Licensing provision to specific user or work station (2 licenses and more)
  2. Licensing in the time-sharing manner with a license manager (1 license and more)

Stand-alone licenses may not be installed in a network!

 

 

 

General packaging and postage costs are DM 25.00

Conditions of payment : in advance with 2% discount or 30 days net.Payment in advance for the first order.

 

 

 

 


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