WO1998022242A1 - Process for manufacturing axle bridge housings - Google Patents

Process for manufacturing axle bridge housings Download PDF

Info

Publication number
WO1998022242A1
WO1998022242A1 PCT/EP1997/006385 EP9706385W WO9822242A1 WO 1998022242 A1 WO1998022242 A1 WO 1998022242A1 EP 9706385 W EP9706385 W EP 9706385W WO 9822242 A1 WO9822242 A1 WO 9822242A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle
axle bridge
housing
housings
segments
Prior art date
Application number
PCT/EP1997/006385
Other languages
German (de)
French (fr)
Inventor
Hermann Sonnleitner
Ulrich Solka
Reinhard Friedl
Franz Edhofer
Original Assignee
Zf Friedrichshafen Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19648213.5 priority Critical
Priority to DE1996148213 priority patent/DE19648213A1/en
Application filed by Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO1998022242A1 publication Critical patent/WO1998022242A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C7/00Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/005Adjustable, sectional, expandable or flexible patterns

Abstract

A process enables axle bridge housings to be manufactured in a more flexible manner, in that it simplifies the production of casting patterns. For that purpose, the patterns are composed of individual segments which correspond to sections of the cast part having particular functions. Patterns for axle bridge housings which should have particular functions are assembled in a modular manner. Starting from this segmented master pattern, a series production plastic pattern is cast via a second, intermediate, negative plastic pattern (5), which is then used to produce the sand casting patterns in which the axle bridge housing is cast.

Description

 Manufacturing process of axle bridge housings

The invention is concerned with a method for the flexible manufacture of axle bridge housings. For the production of axle bridge housings according to the casting process listed in the preamble of the main claim, a model is usually created first. This is conveniently made of wood or wood-based materials that are easy to work with. From this wooden model, a plastic intermediate casting is made to produce a frequently used series model, which is a negative in terms of its shape to the wooden model. With the help of this "plastic negative" a "plastic positive" is cast as a series model. This intermediate model has the advantage over the original wooden model that it is more durable and less worn. It is used to manufacture the sand molds for the axle bridge housings.

In order to be able to produce geometrically complex axle bridge housings, correspondingly complex casting models are required. If the construction of these axle bridge housings is slightly modified for a new function in a partial area, a new cast model must first be created again. This is very expensive, in particular in the case of an axle bridge housing with numerous modifications for the most varied functions. It is often necessary to cast new variants of these axle bridge housings in order to meet new or changed requirements. In order to reduce this effort, the axle bridge could be divided into several housing parts that could be flexibly combined and easily replaced with newer partial designs, but this variety of parts is very complex and cost-intensive in terms of manufacture, storage and assembly. The additional flange surfaces or Connecting parts increase the volume and weight of the axle bridge. Otherwise the component load-bearing capacity may be restricted.

The invention has for its object to reduce the manufacturing costs for axle bridge housings with a large variety.

According to the invention, this object is achieved by simplifying the creation of the cast models by assembling the models from individual segments. By combining different segments, a large number of variants of the casting mold are possible. If the axle bridge housing is redesigned at a certain point according to new requirements, only a limited number of segments of the cast model have to be created again.

The individual segments of the model suitably correspond to sections of the axle bridge housing with certain functionality. Models for axle bridge housings that are intended to perform certain functions can then be assembled according to the "modular principle". The sum of the functional segments forms the "model modular system". If a new functionality of the axle bridge housing is added as a result of expanded requirements, the modular system becomes one

Element expanded. A new model segment must be created. The remaining part of the axle bridge housing does not have to be re-modeled; the familiar and proven segments can be used.

Functional models based on the modular principle and which result from the combination of the individual segments are preferred Model units for the series production of ultimately one-piece castings. For functional reasons, these functional model units can be composed of several individual parts, e.g. B. from core and shell parts for hollow castings. The functional model units can be cast from plastic. Defects on the plastic model, which may occur at the points corresponding to the connection points of the assembled segmented model, can be reworked. The sand molds in which the castings are cast are produced according to these functional model units. The advantage of this indirect path from the original model to the cast part is that the modular model can consist of an easily machinable material, while the resulting one-piece model consists of a hard-wearing and resilient material. The model kit is spared.

The segmented model is preferably made of wood or wooden materials that are easy to work with.

In an advantageous embodiment of the invention, the functional segments of the model for axle bridge housings correspond to housing parts for receiving axle shafts, differentials, wheel hubs or portal drives or housing parts for geometrically adapting the axle to the vehicle or the axle suspension. If, for example, an axle for a construction machine is to be changed so that it gives the vehicle greater ground clearance, the direct wheel drive can be replaced by a portal drive. The model for the new axle bridge housing could then be created by simply replacing its outer segments. In another case, in which a differential is replaced by a new it is replaced with other space requirements, only the functional segment of the axle bridge housing model would have to be replaced for the differential.

This flexible manufacturing method is preferably used for axle bridge housings for construction machinery and agricultural vehicles.

An embodiment of the invention is shown in a figure.

A segmented model 4 is assembled from a combination of functional segments 1 from an ensemble 2 of axis segments and an ensemble 3 from other axis segments. Starting from this, a functional model unit 6 is cast via a plastic intermediate casting 5, which acts as a “negative”, by means of which the sand molds in which the casting is cast are produced.

Reference list

1st functional segment

2nd ensemble

3rd ensemble

4. segmented model

5. Plastic intermediate cast

6. functional model unit

Claims

P a t e n t a n s p r ü c h e 1. Manufacturing process of axle bridge housings by means of casting processes, in particular by the sand casting process, with the molds being modeled in their contours, characterized in that the models for the axle bridge housings are modularly composed of individual model segments and with modifications of the axle bridge housing only the model segment for the modified part of the axle bridge housing is replaced by a new model segment.
2. Production method according to claim 1, characterized in that, according to the model resulting from the combination of individual segments, functional model units (6) are produced for series production via negative casts.
3. Manufacturing method according to claim 1, characterized in that the segmented model (4) consists of wood or wood materials.
4. Manufacturing method according to claim 1, characterized in that the model segments correspond to functional housing parts for receiving axle shafts, differentials, wheel hubs or portal drives or housing parts for geometrically adapting the axle to the vehicle or the axle suspension.
5. Axle bracket housing according to the manufacturing method described in claim 1, <Desc / Clms Page number 7> characterized in that the axle bridge housing is used in construction machinery and agricultural utility vehicles.
PCT/EP1997/006385 1996-11-21 1997-11-15 Process for manufacturing axle bridge housings WO1998022242A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19648213.5 1996-11-21
DE1996148213 DE19648213A1 (en) 1996-11-21 1996-11-21 Manufacturing process of axle bridge housings

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT97950195T AT206644T (en) 1996-11-21 1997-11-15 Manufacturing method of axle bridge housings
DE59704894T DE59704894D1 (en) 1996-11-21 1997-11-15 MANUFACTURING METHOD OF AXLE BRIDGE HOUSINGS
EP97950195A EP0939682B1 (en) 1996-11-21 1997-11-15 Process for manufacturing axle bridge housings

Publications (1)

Publication Number Publication Date
WO1998022242A1 true WO1998022242A1 (en) 1998-05-28

Family

ID=7812355

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/006385 WO1998022242A1 (en) 1996-11-21 1997-11-15 Process for manufacturing axle bridge housings

Country Status (4)

Country Link
EP (1) EP0939682B1 (en)
AT (1) AT206644T (en)
DE (2) DE19648213A1 (en)
WO (1) WO1998022242A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1080784A1 (en) * 1999-09-05 2001-03-07 Rohm And Haas Company A catalyst useful for oxidation of alkanes
WO2014187633A1 (en) * 2013-05-24 2014-11-27 Zf Friedrichshafen Ag Axle housing assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336470A1 (en) * 2003-08-08 2005-03-03 Zf Friedrichshafen Ag Cast component and method for its manufacture
DE102014218945A1 (en) * 2014-09-19 2016-03-24 Siemens Aktiengesellschaft Housing cast model, housing series, method of producing a cast housing of a radial turbofan energy machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830285A (en) * 1972-12-07 1974-08-20 Rockwell International Corp Adjustable casting pattern
US4124057A (en) * 1977-07-13 1978-11-07 Mcconway & Torley Corporation Coupler pattern for a railway vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416134C2 (en) * 1984-05-02 1986-11-06 Bernd 7530 Pforzheim De Schuessler
DE4227837A1 (en) * 1992-08-20 1994-02-24 Siemens Ag Process for making a sub-model

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830285A (en) * 1972-12-07 1974-08-20 Rockwell International Corp Adjustable casting pattern
US4124057A (en) * 1977-07-13 1978-11-07 Mcconway & Torley Corporation Coupler pattern for a railway vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1080784A1 (en) * 1999-09-05 2001-03-07 Rohm And Haas Company A catalyst useful for oxidation of alkanes
WO2014187633A1 (en) * 2013-05-24 2014-11-27 Zf Friedrichshafen Ag Axle housing assembly

Also Published As

Publication number Publication date
EP0939682B1 (en) 2001-10-10
AT206644T (en) 2001-10-15
DE59704894D1 (en) 2001-11-15
EP0939682A1 (en) 1999-09-08
DE19648213A1 (en) 1998-05-28

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