EP3523105A1

EP3523105A1 - Method and device for machining a workpiece

Info

Publication number: EP3523105A1
Application number: EP17790689.8A
Authority: EP
Inventors: Rupert FLÖGEL
Original assignee: Datron AG
Current assignee: Datron AG
Priority date: 2016-10-07
Filing date: 2017-10-06
Publication date: 2019-08-14
Also published as: US20200009659A1; DE102016119147A1; WO2018065584A1

Abstract

In a method for machining a workpiece (1), the workpiece (1) is secured to a carrier element (2) by at least one connecting element (4) or is produced by a generative production method. In an embedding step, the workpiece (1) is introduced into a casting mould surrounding the workpiece (1) and a curing carrier material (16) surrounding the workpiece (1) is introduced into the casting mould, such that the workpiece (1) is embedded and fixed in the carrier material (16). In an exposure step, the carrier material (2) is separated from the workpiece (1) and the workpiece (1) is exposed from a side facing the carrier element (2), in order, in a subsequent second machining step, for it to be possible to machine the workpiece (1) partially embedded in the carrier material (16). The workpiece (1) can be produced by a generative production method on the carrier element (2), wherein at least one connecting element (4) that joins the workpiece (1) to the carrier element (2) is produced at the same time. Arranged on the carrier element (2) are protruding positioning elements (6), which, when the workpiece (1) is introduced into the casting mould (10), come into engagement with matching recesses in the casting mould, in order to define a position of the carrier element (2) with the workpiece (1) secured thereto relative to the casting mould and to allow subsequent referencing of the workpiece (1).

Description

Method and device for machining a workpiece

The invention relates to a method for machining a workpiece, wherein the workpiece with a

Connecting element is set on a support element and processed in a subsequent processing step.

From practice, various methods are known in which a workpiece is arranged on a carrier element in order subsequently to the carrier element in a

To arrange processing machine and that on the

Carrier fixed workpiece with the

Edit editing machine. There are also additive manufacturing processes such as 3D

Printing method or the selective laser melting method, in which the workpiece is produced on the carrier element. In the case of a generative production of the workpiece, the workpiece is produced on the carrier element and is fastened and supported on the carrier element via suitable connecting elements, which are also referred to as "supports." However, it is also expedient to arrange the workpiece on the carrier element subsequently. that not the possibly very small and irregularly shaped workpiece, but the carrier element of a Receiving device of a processing machine or a separate fixing device is received and fixed to perform a subsequent processing step with a processing machine. The support element may optionally be configured standardized to a rapid introduction and fixing in the

Receiving device or fixing device to

facilitate .

With regard to a dimensionally stable and precise recording of the workpiece, the carrier element is usually made of metal or of a high-strength and dimensionally stable

Synthetic material made.

With the support member arbitrarily shaped workpieces can be connected, which can be received and fixed on the support member. For workpieces that are produced with a generative manufacturing process on the support element, an unwanted displacement of the workpiece should be prevented both during its manufacture and optionally in a subsequent processing step, as long as the workpiece with the

Carrier element is connected. Even with an otherwise generated and subsequently on the support element

fixed workpiece should be prevented by the definition of the support element, an undesirable displacement of the workpiece during a subsequent processing step. All known methods are common in that the workpiece is connected via at least one connecting element with the carrier element and thereby on the

Carrier element is positioned and fixed. With the

Typically, several fasteners prevents the workpiece during the

Manufacturing and processing steps relative to the

Relocated carrier element. The at least one connecting element is formed when using a generative manufacturing method for producing the workpiece with the same manufacturing process before, during or immediately after the production of the workpiece with. After the production and

Machining the workpiece can remove the workpiece from the

Support element can be solved by the at least one connecting element is severed or separated from the workpiece. Usually remains of the fastener remains on the workpiece, which must then be removed manually and with great effort later.

The workpiece fixed on the carrier element could, after its production, be machined from a side facing away from the carrier element and, for example, polished,

be coated or reworked shaping. In order to be able to process the workpiece also from a side facing the carrier element, the workpiece must first be released from the carrier element in order to be freely accessible from this side. However, this terminates the fixing of the workpiece relative to the carrier element, so that the positioning of the workpiece caused by the carrier element is eliminated. According to experience, the workpiece can then no longer be picked up and fixed sufficiently precisely in a predefinable positioning relative to a processing machine, so that subsequent processing steps can no longer be processed with the accuracy that precedes the release of the workpiece could be achieved by the support element. There are also complex shaped support elements are known, which are adapted to the male workpiece and a machining of the workpiece of various

Can enable directions from. However, they are

Such support elements often costly to manufacture and can not be readily used for receiving deviating ausgestalteter workpieces.

It is also known to provide for machining the workpiece from the side facing the carrier element, the carrier element with a recess or recess, so that the carrier element facing side of the workpiece through this recess or recess for a

Machining tool is accessible. However, often only limited and insufficient machining of the workpiece is possible, so that the workpiece still has to be released from the carrier element in order to allow complete processing. It is also possible, before or during the machining of the workpiece, the necessary recesses or recesses in the workpiece

Carrier element to be produced, wherein the carrier element is thereby destroyed and is no longer suitable for a subsequent recording of another workpiece. In a workpiece produced by a generative manufacturing method on the support member, the workpiece is usually provided with a large number of fasteners on the workpiece

Carrier element set. An adaptation of the

Carrier element facing side of the workpiece is therefore not or only partially possible regardless of the configuration of the support member. It is therefore considered to be an object of the present invention to provide a method for machining a workpiece in such a way that by simple means a

As precise as possible machining of the workpiece is possible from all sides.

This object is achieved in that in an embedding step, the workpiece in a

Introduced workpiece surrounding mold and a surrounding the workpiece curing material is introduced into the mold, so that the workpiece is embedded and fixed in the substrate, that in an exposure step, the support member separated from the workpiece and the workpiece is exposed from a carrier element facing side, and that in a subsequent processing step, the partially embedded in the substrate material is processed.

By embedding the workpiece in the carrier material, the workpiece is received and fixed, so that the workpiece is fixed even after a separation of the carrier element in the casting mold. The casting mold or the

Carrier material can be recorded and fixed in a suitable receiving device before the processing step. The casting mold can for this purpose have an adapter to position accurate and reliable in one

Recording device to be recorded. It is also conceivable and advantageous for many applications, if the casting mold has an alignment of the casting mold indicating indexing, which may also apply to the

Shaping the cured support material is transferred. According to an advantageous embodiment of

The idea of the invention is that in the

Carrier material facing in one of the casting mold

At least one fixing element is embedded at the edge region, which is partially exposed after hardening of the carrier material and removal of the casting mold and used for receiving in a positioning device. The fixing element may, for example, a

Mounting cone or a step or

have dovetailed shape to

can be positively recorded in the positioning device and set. The fixing element can also be used for automated handling and displacement of the carrier material.

The carrier material is advantageously different from the material of the workpiece, so that the carrier material removed without great effort as needed and the

Workpiece can be partially exposed to allow for the exposed areas machining the workpiece in the second processing step. In this way, the support member can be detached from the workpiece and the workpiece from an originally the

Carrier element facing side are processed from without precise position control and highly accurate

Recording the embedded in the substrate material workpiece is difficult or impossible. The carrier material serves the positionally accurate and stable recording and

Determining the separate from the support member workpiece. The carrier material is expediently so

selected, on the one hand, a precise positioning and fixing of embedded in the substrate On the other hand ensures work piece and on the other hand can be removed quickly and with simple means and can be removed from the workpiece without damaging the workpiece or a surface of the workpiece is affected.

It is inventively provided that the carrier element adapted from a to the material of the workpiece

Material consists or at least a coating of a matched material, thus the workpiece

as reliably connected to the support element and can be fixed to it. The support element should provide a well-adhering surface for the relevant workpiece. Any occurring during a manufacturing step or processing step thermal stresses between the support member and the workpiece should

be as low as possible.

According to a particularly advantageous embodiment of the

According to the invention, it is provided that the

Workpiece produced by a generative manufacturing process on the support element and at least one the

Workpiece with the carrier element connecting

Connecting element is manufactured with. Examples of a generative manufacturing process are 3D printing and beam melting processes such as selective laser melting, electron beam melting or selective laser sintering. With such a generative manufacturing process can each be three-dimensional

Workpieces gradually and in particular layers of a hardening starting material or from one by suitable means fused and solidified

Starting material are produced. Because the workpiece is made directly on the fasteners building on the support element, eliminating the need for subsequent placement and fixing on the

Carrying member. The carrier element serves to receive the workpiece during the manufacturing process.

In many cases, the workpiece must be after its

shaping generative structure are processed, for example, to smooth the surface or to

polish to grind its surface or

machined to bring the shape and the surface roughness of the workpiece to a predetermined final dimension. Usually, others will

Tools and possibly other machine tools than required in the generative structure of the workpiece. If the workpiece between individual manufacturing and processing steps, for example, from a first

Receiving device in a first manufacturing device in another receiving device in one

Machine must be transferred, the support element allows a precise arrangement of the workpiece, since its position relative to the support element either by the previous manufacturing process on the

Carrier element or by its precise definition and optionally referencing on the support element is known.

In order to be able to use the casting mold for a precise arrangement of the workpiece, it is provided according to the invention that at least one protruding positioning element is arranged on the carrier element or on the workpiece, which during the introduction of the workpiece into the casting mold engages with adapted recesses in the mold to a positioning of the support member with the workpiece thereon relative to the

Specify casting mold. In this way, the arrangement and positioning of the casting mold relative to the carrier element and the workpiece can be predetermined by simple means. In the positioning elements may be protruding formations, for example, at an edge of the support member or along a

Contact surface of the support element are arranged with the casting mold. Preferably, three or more

Positioning provided. By three

Positioning elements, for example, along a peripheral edge of the support member in irregular

Spaced apart from each other, an unambiguous position determination and orientation of the carrier element relative to the mold can be determined and specified.

The positioning elements can be made separately and subsequently connected to the carrier element. It is especially when using a generative

Manufacturing process for the workpiece also possible to produce the positioning elements in the same manufacturing step together with the workpiece.

The support member may be configured disc-shaped or plate-shaped and have a flat receiving surface for the workpiece and the positioning elements. According to an advantageous embodiment of the inventive concept, it is provided that the positioning elements are positioning pins projecting from the carrier element. The positioning pins may be substantially perpendicular from protrude the flat receiving surface and in a compound of the mold with the support element in it adapted recesses, such as blind holes in the

Intervene casting mold.

In order to separate the carrier element from the casting mold and the carrier material incorporated therein with the workpiece embedded therein, the carrier element can be separated from the carrier element by a separating process along a separating surface extending between the carrier element and the casting mold

Grouting form and the carrier material are separated. An often suitable parting line runs plane-parallel to the surface of the support element and transversely to the perpendicularly projecting connecting elements. The support element can then be cleaned and reused.

The positioning elements may conveniently be formed as disposable parts, in contrast to the

Carrier element should not be used multiple times. In a generative production of the workpiece and the

Positioning elements, the positioning elements can not be used multiple times. The

Positioning elements which protrude from the carrier element and engage with the casting mold must then also be separated from the carrier element. It would also be possible to multiply the positioning elements

can be used to design and releasably connected to the carrier element before the embedding step, to remove the positioning elements after curing of the carrier material before the carrier element is separated from the casting mold again by the separation process. When using a generative manufacturing method for the workpiece and the positioning elements, it may be appropriate that the positioning elements in each case via at least one connecting element with the

Carrier element are connected. During the separation of the carrier element then not only the

Connecting elements with which the workpiece with the

Carrier element was connected, but also the

Connecting elements of the positioning elements are separated, so that the positioning elements remain on or in the carrier material.

In order to promote a stable and positionally accurate fixation of the positioning elements can also be provided according to the invention that the

Positioning elements are fixed directly on the support element, without that between the

Positioning elements and the carrier element are often arranged thin and hollow-walled connecting elements.

It is also possible according to the invention that the

Positioning elements are fixed to the casting mold or molded thereon and adapted thereto

Recesses in the carrier element can be brought into engagement.

A stabilization of the positioning elements and a precise positioning of the

Positioning elements relative to the workpiece can be inventively favors that the

Positioning elements via stabilizing elements with be connected to the workpiece. The stabilizing elements can be similar to fasteners or at

generative manufacturing method known support be designed and cause a stabilizing connection of the workpiece with the relevant positioning element. Due to the composite effect, the location of the

Workpiece relative to the positioning additionally set and, for example, during a

subsequent post-processing additionally fixed.

In order to facilitate the separation of the carrier element from the casting mold and the carrier material cured therein, it can be provided that an interior of the casting mold is not completely filled with the carrier material, but that a thin gap remains free on the surface of the carrier element arranged at the top during the filling process that the cured carrier material is not the

Carrier element touched.

In order to facilitate the separation of the carrier element from the casting mold and also to facilitate exposure of the embedded in the casting mold in the substrate workpiece from the carrier element side facing is provided according to the invention that the casting mold is designed in several parts and taken apart after curing of the carrier material and the cured one

Support material is removed from the mold. The casting mold can

for example, from two each semi-annular

Wall shells exist, which can be assembled into a hollow cylindrical wall formwork and connected to the support element, so that a pot-like

Mold is formed. The carrier material can in this cup-shaped mold are filled, the

Level should be sufficiently large to at least partially or completely embed the workpiece or the plurality of workpieces which are arranged on the carrier element in the curing carrier material. After this

Curing the substrate can be the two

semi-annular wall shells are again separated from each other and from the support element.

According to an embodiment of the inventive concept, it is also possible that the casting mold a

Molded floor element and a detachable with the

Vergussformbodenelement connectable side wall ring member, and that the side wall ring member is released and removed before or after the exposure step of the Vergussformbodenelement. The side wall ring element may for example be formed in two parts and two

Halbringen be composed, which can be removed again after curing of the carrier material.

The sidewall ring element may as well as the

Molded floor element be made of a metal or of a high-strength and dimensionally stable KunstStoffmaterial. Preferably, the casting mold consists of a

Material to which the carrier material does not adhere, so that a simple demoulding is made possible. Optionally, the sidewall ring element can also be made of a different material than the Vergussformbodenelement. By loosening and removing the

Side wall ring element of the Vergussformbodenelement a portion of the carrier material between the support member and the Vergussformbodenelement is freely accessible, so that with conventional mechanical separation methods such as cutting or sawing the substrate and the

Connecting elements and possibly the

Positioning elements in this area severed and the carrier element of the Vergussformbodenelement

can be separated without damaging the carrier element or the casting mold.

The mold, whose position relative to the

Carrier element is precisely specified and known by the positioning elements, can in subsequent

Serving steps for fixing the workpiece in a dedicated receiving device serve. A new referencing of the workpiece is not mandatory. The subsequent processing steps can be performed without loss of time and with a high spatial precision.

It is also possible and expedient for various applications that the carrier material with the workpiece and with the positioning elements removed from the casting mold and in a positioning device

is determined before a subsequent processing of the workpiece takes place. With a suitable choice of the

Support material can be removed from the mold, the carrier material from the mold, whereby a predetermined by the mold outer contour of the substrate is maintained, which then for precise arrangement and

Fixing a demolded from the casting mold block of the carrier material can be used. The by the

Carrier material formed molding of the molding can on be adapted standardized or predetermined recording devices of processing machines.

An advantageous embodiment of the inventive concept is provided that after the determination of the

Carrier material in the positioning device scanned the protruding from the carrier material positioning elements and for an optionally renewed

Referencing of the workpiece can be used. Thereby, an increase of the homing accuracy is possible by scanning the positioning elements, which have a precisely predetermined position relative to the workpiece. In this way, the accuracy of the

Orientation of the workpiece relative to a

Machining tool to be used for the machining step improves and a more precise

Post-processing be carried out.

In many cases it is advantageous that as

Carrier material a curing impression material, a

Embedding material or a suitable wax is used. Also different plastics or resins can as

Carrier material can be used. It is also possible to use a suitable thermoplastic KunstStoffmaterial as a carrier material, which after the

Heated processing step and thus can be removed without residue from the workpiece. The support material may be transparent or opaque in a cured state for optical control of the embedded one

To enable workpiece. Furthermore, it is also conceivable to use a suitable thixotropic material as

To use carrier material. Numerous preceding said support materials and their properties are known in practice. They are easy to get into

Cast the mold and, after curing, gradually remove or remove the embedded

Uncover workpiece.

According to one considered to be particularly advantageous

Embodiment of the inventive concept is provided that as an alloy carrier, an eutectic

Alloy and preferably a eutectic alloy with indium and / or bismuth is used. An alloy composed of two or more metals allows a particularly high mechanical stability and strength in the definition of the workpieces embedded therein and thus a high degree of precision in the positioning and subsequent machining of the workpieces. With a eutectic alloy can be a particularly low

Melting temperature are possible. This can

For example, the energy required both for a filling of the casting mold with the liquefied eutectic

Alloy prior to processing of workpieces and for after machining the workpieces appropriate

Liquefaction and residue removal of the

Support material can be reduced by the workpieces. A eutectic alloy of the metals indium and bismuth

seems particularly advantageous because this alloy

on the one hand has a low melting temperature of about 72 ° C and on the other hand composed of non-toxic metals for living things. There are others too

Alloys or eutectic alloys known, which also have advantageous properties for use as a carrier material. So are low melting Indium-based alloys, for example the Fieldsche metal, or low-melting alloys

Bismuth base, for example the Woodsche alloy, or low-gallium gallium alloys are known, each of which is commercially available and can be used depending on the requirements of the case.

The invention also relates to a device for picking up and processing a workpiece with a carrier element on which the workpiece can be arranged and fixed. According to the invention it is provided that the device has a releasably connectable with the carrier element casting mold, which surrounds the workpiece and can be filled with a substrate surrounding the substrate. The casting mold can have, for example, one or more filling openings for the carrier material. The filling openings can be designed to be closable. According to one embodiment of the inventive concept, it is provided that the device has connectable positioning elements with the carrier element, which can each be brought into engagement with a recess adapted thereto in the casting mold in order to predetermine a positioning of the carrier element relative to the casting mold. The positioning elements can be protruding formations which are formed on the carrier element. The positioning elements can also

Positioning pins or positioning cone, which can be fixed to the support element. The

Grout has adapted recesses into which the positioning elements can engage to to specify the position of the mold relative to the carrier element precisely and reliably. In addition, the engaging in the recesses in the mold end portions of the positioning of the carrier material

shielded and protrude after demolding of the casting mold from the cured support material, so that the end portions of the positioning elements for a

Subsequent scanning and referencing of the workpiece can be used without requiring an advance

Exposing the end portions of the positioning elements is required.

For this purpose, the invention provides that for an engagement with a positioning element

provided recesses in the mold each having a seal with which a gap between the positioning member and the adjacent region of the mold is sealed, so that no carrier material can penetrate into the recess. The seal may be, for example, as a ring seal with an inserted into a groove sealing ring.

It is also possible that the positioning elements are formed on the casting mold or connected to the casting mold and can engage in recesses adapted thereto in the carrier element. Furthermore, it is also conceivable that only one positioning element

is provided. This is a positioning element

expediently not formed rotationally symmetrical to a clear positioning and fixing the

To allow casting mold relative to the carrier element. Preferably, three or more positioning elements are in the greatest possible distance from each other to facilitate a clear orientation.

According to a particularly advantageous embodiment of the inventive concept it is provided that the casting mold is designed in two parts or more parts and the multiple parts of the casting mold detachably with each other

are connectable.

An advantageous handling of the casting mold during the implementation of the method according to the invention can be facilitated by the fact that the casting mold

Vergussformbodenelement and a releasably connectable multi-part side wall ring element has. The

Sidewall ring element is expediently formed in two parts or multi-part and designed so that the

Side wall ring element after filling the mold with the support material and after its hardening can be solved and removed from the Vergussformbodenelement so that the support member and the Vergussformbodenelement the support material further surrounded, but are separated by an originally covered by the side wall ring element annular area. This region, in which the carrier material is exposed with the connecting elements arranged therein, can then be easily removed for separating the carrier element from the casting mold bottom element and the therein

Carrier material can be used with the workpiece embedded therein. Hereinafter, embodiments of the

Invention concept explained in more detail, which are shown by way of example in the drawing. 1 shows schematic snapshots during the production and processing of two workpieces with the method according to the invention and using the device according to the invention, FIG. 6 shows a schematic snapshot in front of one

Embedding step, wherein several workpieces are additionally connected to each other with stabilizing elements,

7 shows a schematic representation of a shaped body formed from a hardened carrier material, in which two workpieces and three positioning elements are embedded,

8 is a schematic representation of the in Fig. 7

shown molded body which is received in a receiving device of a processing machine and a

simultaneous processing of opposite

Fig. 9 shows an enlarged partial view of a sealed recess in a casting mold, in which a

Positioning element engages,

10 is an enlarged partial view of an edge region of the shaped body formed from the cured support material in the casting mold, wherein during the embedding step a fixing element has been introduced as an insert in the edge region, and

11 is an enlarged fragmentary view of the formed body shown in FIG. 10 from the substrate, with the mold removed and a portion of the fixing element exposed to form a gripping portion of the substrate

To make fixation element accessible. In the figures 1 to 5 several snapshots of a manufacturing and processing method according to the invention are shown. In Figure 1 is a schematic

Manufacturing step shown, wherein by means of a generative manufacturing process such as 3D printing or selective laser melting two workpieces 1 are generated and solidified on a disk-shaped support member 2 in layers. The carrier element 2 is in a non-illustrated

Receiving device recorded and fixed in position and location. The two workpieces 1 are arranged on a flat surface 3 of the carrier element 2 and connected in each case via a plurality of connecting elements 4 with the carrier element 2 and fixed thereto. A bottom 5 of the workpieces 1 has a distance of, for example, one or more millimeters to the surface 3 of the

Support element 2 on.

Simultaneously with the generative production of the two workpieces 1, a plurality of positioning elements 6 are generated generatively. The positioning elements 6 are pin-shaped, are perpendicular from the flat surface 3 of the support member 2 and have a rounded end portion 7 on. The positioning elements 6 are in contrast to the two workpieces 1 is not connected via connecting elements 4, but directly on and with the carrier element 2 and fixed thereto.

In a subsequent Erstbearbeitungsschritt (Figure 2), the finished workpieces 1 with a

suitable machining tool 8 are processed. With the machining tool 8, for example, a

Surface finishing of the workpieces 1 are made. However, due to the determination of

Workpieces 1 on the support element 2 only one side of the workpieces 1 facing away from the carrier element 2 for the machining tool 8 accessible, so that only the side facing away from the carrier element 2 with the

Machining tool 8 can be edited. Such Erstbearbeitungsschritt is not necessarily necessary in many cases. In a subsequent embedding step shown schematically in FIG. 3, after the first processing step, a casting mold 10 is connected to the carrier element 2, wherein the casting mold 10 surrounds the two workpieces 1 and the positioning elements 6. The

Positioning elements 6 engage with the end portions 7 in it adapted recesses 11 in the mold 10 and form a positive positioning and

Positional fixing of the casting mold 10 relative to the

Carrier element 2. The embedded together with the workpieces 1 positioning elements 6 also form

Calibration points whose position is specified. The positioning elements 6 can before a subsequent Processing step also sampled and to a

Reference tion of the workpieces 1 are used.

The casting mold 10 consists of a pot-like

formed Vergussformbodenelement 12 and a side wall ring element 13, which in turn consists of two

half-ring-shaped half-ring 14 is formed. The half rings 14 can be releasably connected to each other

annular side wall ring element 13 assembled and also releasably connected to the Vergussformbodenelement 12 or at a later date of the

Vergussformbodenelement 12 are removed.

The casting mold 10 connected to the carrier element 2 forms a cavity 15 in which the two workpieces 1 are arranged. In the cavity 15, a first liquid carrier material 16 is introduced, with which the cavity 15 is filled and the two workpieces 1 are completely surrounded. The first liquid

Substrate 16 then cures. The two workpieces 1 are then completely surrounded by the carrier material 16 and embedded therein, so that the workpieces 1 and the positioning elements 6 are fixed by the surrounding hardened carrier material 16 in their position within the casting mold 10.

The casting mold 10 can be received in a receiving device, not shown, and fixed in position.

In a subsequent exposure step shown schematically in FIG. 4, the two half rings 14 become detached from each other and from the Vergussformbodenelement 12 and from the support member 2. Subsequently, the carrier element 2 is separated along the planar surface 3 with a band saw 17 from the casting mold 10 and the carrier material 16 hardened therein. For separating the carrier element 2, any suitable

mechanical separating device, for example a cutting edge or a saw. The carrier element 2 can also be aberded. It can be a thin slice of the

Support material 16 are destroyed in a region near the surface 3 of the support member 2. During the

Separating the carrier element 2 are also the

Positioning elements 6 and the connecting elements 4 cut through, which have the workpieces 1 connected to the carrier element 2.

Subsequently, the two workpieces 1 can be exposed with a suitable machining tool 18 from a side 19 originally facing the carrier element 2 as required to produce a subsequent second

Machining step to allow processing of the two workpieces 1 of the originally the support member 2 side facing 19 from, as shown schematically in Figure 5. After a now from all sides 9, 19 processing of the two workpieces 1, the workpieces 1 completely from the substrate 16

be taken out. The carrier material 16 may for this purpose initially from the Vergussformbodenelement 12th

taken out or demoulded. Subsequently, the carrier material 16 can be removed completely and without residue from the workpieces 1 using suitable methods. In the example shown in Figure 6

Embodiment, a plurality of small workpieces 1 for the purpose of additional stabilization with each other with stabilizing elements 20 are connected. The

Stabilizing elements 20 can with the usual

generative manufacturing process together with the

Workpieces 1 and the positioning elements 6 are generated. In this way, a number of small

Workpieces 1 on a support member 2 reliably

be set and edited with the inventive method from all sides. Also the

Positioning elements 6 can with

Stabilizing elements 20 are connected to the workpieces 1, in order to achieve additional stability and a more accurate reference ierung.

In FIGS. 7 and 8 an advantageous embodiment of the method according to the invention is shown by way of example. After the production of the workpieces 1 and the

Positioning elements 6 on the support element 2 is formed from two semi-annular wall shells 21

Grouting mold 10 placed on the support member 2 so that the workpieces 1 and the positioning elements 6 are surrounded by the two semi-annular wall shells 21.

Subsequently, in the embedding step, the hardening carrier material 16 is filled into the casting mold 10, wherein the filling height for the carrier material 16 is dimensioned so that upper end regions 22 are not covered by the positioning elements 6 of the carrier material 16 and

protrude. After curing of the carrier material 16, the two semi-annular wall shells 21 are removed from the mold and the support element 2 of the remaining molded body 23rd separated. In the shaped body 23, the outer shape of which has been predetermined in the area of a circumferential sheath by the casting mold 10, the two workpieces 1 and the positioning elements 6 are embedded.

The protruding from the molding 23 end portions 22 of the positioning elements can after receiving the molded body 23 in a direction indicated in Figure 8

Recording device 24 is sampled and for a

Referencing of the workpieces 1 are used in the molding 23. This is a very accurate

Position detection of the workpieces 1 in the molding 23 possible, which is received in the receiving device 24 and fixed in its position.

Subsequently, in a subsequent

Processing step opposing surfaces 25 and 26 simultaneously or successively with suitable processing tools 8, 18, processed without the molding 23 must be removed from the receptacle 24 and resumed, and without a

Embrace the previous referencing and thus impair the achievable precision in the machining of workpieces 1.

FIG. 9 shows, by way of example, an enlarged view of a recess 11 in the casting mold 10. One

End region 22 of a positioning element 6 protrudes into the recess 11 during the embedding step

prevent the still liquid carrier material 16 from curing through a gap between the

Positioning element 6 and the recess delimiting area of the casting mold 10 penetrates into the recess 11, a sealing ring 27 is inserted into a groove 28 extending along the circumference of the recess 11. The sealing ring 27 seals the annular gap between the

Positioning element 6 and the mold 10 and prevents the end portion 22 of the

Positioning element 6 is wetted by the substrate 16 and wrapped. In the figures 10 and 11 is only schematically

shown that during the embedding step

additional fixing elements 29 as an insert in an edge region 30 on the casting mold 10 in one

Connecting region of the two half rings 14 of the

Side wall ring element 13 can be embedded with such in the molded body 23 formed by the carrier material 16 that a gripping portion 31 of

Fixing element 29 of the two half-rings 14th

is enclosed and an anchoring area of the

Fixing element 29 is embedded in the carrier material 16. After the curing of the carrier material 16, the casting mold 10 can be removed from the mold in order to keep the gripping portion 31 of the remaining mold body 23 in the remaining

uncover anchored fixation element 29. Of the

exposed gripping portion 31 can be used to the shaped body 23 before a subsequent

To take processing step and receive or fix in a suitable receiving device of a processing machine.

In an advantageous embodiment of the method according to the invention, first the workpieces 1 and Positioning elements 6 generated by means of a generative manufacturing process on the support member 2. Subsequently, the workpieces 1 and the

Positioning elements 6 in an embedding step surrounded by a casting mold 10 and in a curing

Embedded substrate 16. The casting mold 10 and the carrier element 2 are hardened from the

Support material 16 formed moldings 23 demolded or separated. The molded body 23 is in a

Received device 24 and fixed in position. The end regions 22 of the positioning elements 6 projecting from the shaped body 23 are scanned and the workpieces 1 embedded in the shaped body 23 are referenced so that their position relative to the receiving device 24 is precisely known. Then you can in one

subsequent processing step, the surfaces 25, 26 of the workpieces 1 with suitable processing tools 8, 18 are reworked.

Claims

Patent claims

1. A method for processing a workpiece (1), wherein the workpiece (1) with at least one connecting element (4) on a support element (2) is set and is processed in a subsequent processing step, characterized in that in an embedding step the

Workpiece (1) in a workpiece (1) surrounding

Casting mold (10) introduced and surrounding the workpiece (1) curing support material (16) in the

Grouting mold (10) is introduced so that the workpiece (1) is embedded and fixed in the carrier material (16), that in an exposure step, the carrier element (2) separated from the workpiece (1) and the workpiece (1) of a the carrier element (2) facing side (19)

is exposed, and that in a subsequent

Machining step partially in the substrate (16) embedded workpiece (1) is processed.

2. The method according to claim 1, characterized in that the workpiece (1) by a generative

Produced manufacturing method on the support element (2) and at least one of the workpiece (1) with the support element (2) connecting the connecting element (4) is produced.

3. The method according to claim 1 or claim 2, characterized in that on the carrier element (2) or on the workpiece (1) at least one projecting

Positioning element (6) is arranged.

4. The method according to claim 3, characterized in that the projecting positioning elements (6) in the introduction of the workpiece (1) into the casting mold (10) with adapted recesses (11) in the casting mold (10) engage to a Positioning the

Carrier element (2) with the workpiece (1) fixed thereon relative to the casting mold (10) pretend.

5. The method according to claim 3 or claim 4, characterized in that at least three

Positioning elements (6) spaced from each other

to be ordered.

6. The method according to any one of claims 3 to 5, characterized in that the positioning elements (6) of the support element (2) projecting positioning pins.

7. The method according to any one of claims 3 to 6, characterized in that the positioning elements (6) are each connected via at least one connecting element (4) with the carrier element (2).

8. The method according to claim 2 and one of claims 3 to 7, characterized in that the positioning elements (6) via stabilizing elements (19) are connected to the workpiece (1).

9. The method according to any one of claims 3 to 8, characterized in that the positioning elements (6) with a generative manufacturing process together with the workpiece (1) are produced.

10. The method according to any one of the preceding claims, characterized in that the casting mold (10)

is designed in several parts and after curing of the carrier material (16) disassembled and removed from the cured carrier material.

11. The method according to claim 10, characterized in that the casting mold (10) has a Vergussformbodenelement (12) and a releasably connected to the Vergussformbodenelement (12) connectable side wall ring element (13), and that the side wall ring element (13) before or after the

Exposing step of the Vergussformbodenelement (12) is released and removed.

12. The method according to any one of the preceding claims, characterized in that the carrier material (16) with the workpiece (1) and with the positioning elements (6) removed from the casting mold (10) and in a

Positioning device is set before subsequent processing of the workpiece (1).

13. The method according to claim 12, characterized in that after the determination of the carrier material (16) in the positioning device from the carrier material (16) protruding positioning elements (6) are scanned and used for a referencing of the workpiece (1).

14. The method according to claim 12 or claim 13, characterized in that during the embedding step in the carrier material (16) in one of the casting mold (10)

facing edge region at least one fixing element is embedded, which after curing of the

Support material (16) partially exposed and for the

Recording is used in a positioning device.

15. The method according to any one of the preceding claims, characterized in that a curing impression material, an embedding compound, a wax or a thermoplastic KunstStoffmaterial is used as the carrier material (16).

16. The method according to any one of the preceding claims 1 to 14, characterized in that as the carrier material (16) an alloy, a eutectic alloy and preferably a eutectic alloy with indium and / or bismuth is used.

17. Device for recording and editing a

Workpiece (1) with a support element (2) on which the workpiece (1) can be arranged and fixed, characterized in that the device has a with the carrier element (2) releasably connectable casting mold (10), which the workpiece (1 ) and can be filled with a workpiece (1) surrounding the carrier material (16).

18. Device according to claim 17, characterized in that the device can be connected to the carrier element (2) Positioning elements (6) which are in each case engageable with a recess (11) adapted thereto in the casting mold (10) in order to ensure positioning of the carrier element (2) relative to the casting mold (10).

pretend.

19. The apparatus of claim 17 or claim 18, characterized in that for engagement with a

Positioning element (6) provided recesses (11) in the mold (10) each having a seal with which a gap between the positioning element (6) and the adjacent region of the mold (10) is sealed, so that no support material (16) in the recess (11) can penetrate.

20. Device according to one of claims 17 to 19, characterized in that the casting mold (10) is designed in two parts or more parts and the plurality of parts of the casting mold (10) are releasably connectable to each other.

21. The apparatus according to claim 20, characterized in that the casting mold (10) a Vergussformbodenelement (12) and a releasably connectable multi-part

Side wall ring element (13).