PolTolerances-AC
Dimensions, tolerances and fits for (plastic) parts under application conditions
Dimensions under application conditions
The basis for part development, mould design and production are the service or application conditions. If dimensional changes after production are relevant for the function of the parts, they must be taken into account when defining dimensional position, shift and variation.
The software can also be used without restriction for parts made of other materials.
During the application period of a moulded part (after production), different usage and storage conditions affect dimensional accuracy and function. They lead to dimensional shifts and tolerance changes. If the application conditions (AC) and the resulting dimensional shifts are known and can be assigned to the part, a part pairing (fit) or individual dimensions, the dimensional and tolerance changes can be calculated.
As a rule, dimensions, fits and tolerances are defined based on the application conditions (AC) and must then be transformed to other dimensional reference levels, e.g. the acceptance conditions of part production (FAC). Once the dimensions are available under FAC, DIN ISO 20457 can be used to decide whether, how and under which conditions they can be achieved. This may require refining material decisions for moulded or supplied parts, or correcting mould design and manufacturing process.
These methods for dimensional shifts are not limited to plastic parts. Especially when parts are combined (fits), all dimensions must first be transformed to the same reference system – the software supports you in doing so.
Application conditions and dimensional changes
- Manage application conditions (AC): create, edit, delete
- Several dimensional changes can be defined for each application condition
- Reuse predefined application conditions across projects (managed as a file)
- Calculation algorithms for plastic parts for thermal expansion, thermal contraction and swelling
- Assign application conditions individually to the part, individual dimensions and/or fit reference parts
Projects, dimensions and fits
- Manage projects/(moulded) parts, each in a separate file
- Enter and edit individual dimensions and fits within a project
- Scaled graphical display of fits and individual dimensions including dimensional changes for both reference levels (AC, FAC)
- Instant calculation of dimensions, tolerances and fits in the respective other reference system
- Instant evaluation of dimensions under FAC according to DIN ISO 20457
- Change application conditions, tolerance group, dimensions, deviations and fit data at any time – the effects are visible immediately
- Print the application conditions and all project details
- Usable without an internet connection
- optional: approx. 18,593 commercial products from 32 manufacturers with the most important material data and published property charts
… and all functions of PolTolerances
- Direct tolerancing of linear dimensions including general tolerances
- Tolerances for profile deviations
- Direct position tolerancing with cylindrical tolerance zones
- Switch between DIN ISO 20457 and DIN 16742 at any time
- Simple and fast entry of the dimensions to be toleranced
- Assistant for determining the achievable tolerance series
- Determination of the conditions under which a required functional deviation can be achieved
- Display of approx. 500 processing shrinkage ranges for orientation
- Tolerance value tables
Try it now
Register in the customer portal to use the software as a trial version, or find out about prices and licenses.
System requirements
- Runs on Windows 10 and later
- Administrator rights for installation and updates
- Usable without internet – a connection is only needed for activation as full version and update notifications
User manual PDF · 1.3 MB
Our colleague Prof. Bernd-Rüdiger Meyer and co-author Dirk Falke have written a reference book on the dimensional accuracy of plastic moulded parts and on DIN 16742, published by Carl Hanser Verlag, Munich.
The most important decision fields of moulded part engineering are material, mould, production and part geometry. These fields and their interrelations are described with respect to the overriding quality criterion of dimensional accuracy. The focus is on material and mould; in addition, tolerance management and the influence of application and production conditions on dimensional accuracy are explained in detail. DIN 16742 is at the centre of the book. A central demand on part developers is the separation of functional tolerances (design tolerances) and production tolerances. Notes on the status of GPS standardisation are given, with particular emphasis on form and position tolerancing of plastic moulded parts. The authors' experience and practical examples support the reader.
Contents
- Principles for developing dimensionally accurate moulded parts
- Dimensional accuracy and geometrical product specification
- Introduction to tolerance management
- Dimensional reference levels for the application and production of moulded parts
- Plastic properties and their influence on the dimensional accuracy of moulded parts
- Influence of mould design on dimensional accuracy
- Applications of design and simulation techniques
- Production tolerancing according to DIN 16742
Another reference book by Prof. Meyer: The book to the software.
1 / 6 · Main window with multiple dimensions
2 / 6 · Editing a clearance fit
3 / 6 · Creating a new application condition
4 / 6 · Dimensional change (swelling), climate zone selection
5 / 6 · Dimensional change (swelling), calculation
6 / 6 · Print / print preview
The software module "Commercial products" is optional and contains a database with the most important commercial product data of several plastics manufacturers. The database is also available as standalone software PolPlastics.
Moulding compounds of the following manufacturers are included
Included commercial products
The most important material data of the following moulding compounds are included:
| Commercial name | Manufacturer | Polymer family |
|---|
The trial version is limited in the dimension ranges; full versions have no limitations. The commercial products database is optional.
| Trial version | Full version | Full version + commercial products DB | |
|---|---|---|---|
| free of charge | yes | no | no |
| registration required | no | yes | yes |
| individual dimensions | length and diameter dimensions 5…55 mm | no limitations | no limitations |
| fits | fit dimensions 5…55 mm | no limitations | no limitations |
| DIN ISO 20457direct tolerancing of nominal dimensions | size dimensions 5…55 mm | no limitations | no limitations |
| DIN ISO 20457tolerances for profile deviations | nominal distances 50…120 mm | no limitations | no limitations |
| DIN ISO 20457direct position tolerancing with cylindrical tolerance zones | nominal distances 5…30 mm | no limitations | no limitations |
| usable processing shrinkage values (approx. 500) | approx. 20% | all | all |
| usable commercial products (approx. 18,593) | approx. 5% | approx. 5% | all |
For system requirements see "Try it now" in the Description tab.
