DE102009019869B4 - Housing for process engineering machines and apparatus - Google Patents

Abstract

Housing for process engineering machines for receiving the drive, work space with rotating work part as well as material feed and product discharge, characterized in that at least one housing part has a polygonal profile, and with cylindrical inner bore different wall thicknesses, which take on different functions, with connection points to other system parts and / or housing parts as Polygon profile are executed.

Description

The invention relates to a housing shape for process engineering machines, especially miniature machines, which improves both manufacturing and assembly, as well as handling for the operator.

For the development of innovative products and their manufacturing processes, often only small amounts of material are available, as these are very expensive and sometimes highly effective. For product development but also for process development, machines with ever smaller process spaces are needed. On the other hand, however, they must have all the components of a large machine. They are not arbitrarily scalable but require new manufacturing technologies and new design features. This applies in particular to machines in process engineering for dry and wet processing methods such as mills, mixers and classifiers.

Known are some individual solutions for miniature machines such as the small agitator mill, which in the EP 1185371 A1 is described. As in the specific case, they solve certain problems such as avoiding the entry of air into the mill, but they show no way how a complete group of machines, in this case process machines, can be designed and manufactured in the smallest possible size and easy handling for the user. By default, small and medium-sized machines are manufactured as monoblocks. If the monobloc design is used even on the smallest machines, you get very chunky and heavy machines, since the goal is to realize all machine elements and required connections to a workpiece by machining.

The invention is therefore an object of the invention to provide a solution that makes it possible to build the smallest machines that consist of as few components as possible, but have all functional surfaces, such as machines of large design and also easy to handle.

In a machine of the type described above, the object is achieved in that at least one housing part has a polygonal profile, and cylindrical inner bore different wall thicknesses, which assume different functions, with connection points to other parts of the system and / or housing parts are designed as polygonal profiles.

The housing according to the invention of a process-engineering machine accommodates, for example, the drive of the machine, the working space with the rotating working part, as well as devices for the material task. The housings are used in particular for dry and wet processing machines, including mills, classifier mills, cutting mills, classifiers, mixers as well as compactors.

The housings have at least one polygonal outer contour. Due to the polygonal shape, the housing parts which have a cylindrical inner bore have different wall thicknesses, these represent function carriers. Wall thickenings can be used to provide connections for purge air or cooling water supply. You can pick up machine components such as injector nozzles. Funnels for material feeding can be integrated into the housing part without the need for an additional component. Thereby, the number of components for such a mini machine can be minimized. Wall thinnings can serve as connecting surfaces to other machine components or plant components.

In the case of very small machines, lack of space often means that no clamps can be used as connecting elements because a large space is required for mounting the clamps.

Alternatively, the fixing of housing parts and machine components takes place in that the components have fitting pieces which are pushed into one another. The outer fitting is provided with threaded holes. These serve to receive grub screws with a conical end. In the inner fitting a conical recess is mounted opposite the threaded hole. This configuration of the components, the housing parts or machine components can be fixed in the desired manner. As a rule, a set screw is sufficient.

In addition to the housing parts and connecting surfaces can be performed to other machines or other system components with a polygonal contour, they also have the advantage that they can be assembled against rotation and in a clear installation position.

As a polygon shape for the housings and connecting surfaces polygons with odd number of corners are preferred, especially the triangle. The corners of the polygon can be rounded and the sides can also have a radius. Profiles P3G according to DIN 32711 and P4C according to DIN 32712 are preferably used.

The polygonal outer contours of the housing parts are made by turning and grinding, the polygonal inner contours are preferably made by wire erosion. The Polygon inner contour forms with the polygonal outer contour a press fit, which forms a body after the shrink connection, which corresponds to the monoblock production and is preferred for pharmaceutical applications. The shape (polygonal shape) prevents the body after the composite, the initiation of a rotary motion, so the press-fit of the body must be secured against displacement. The bodies have only one degree of freedom in the axial direction during joining. If this degree of freedom is determined by a device or measurement, it is possible to produce chambers or holes that are at an angle to each other by separate partial production of the blanks.

In order to realize different machine components in a housing, it is necessary to assemble housing parts by shrinking. According to the invention, at least one housing part has a polygonal shape. If the housing parts to be joined together have a corresponding polygonal or polygonal inner contour, they can be joined together against rotation and joined together in an unambiguous installation position. In addition, the individual housing parts can already be equipped with holes and function carriers prior to assembly.

The polygonal shape has functional surfaces which make it possible to facilitate assembly and disassembly by means of rotational movement, since torque can only be introduced via the frictional force, as in the case of cylindrical components.

Further details, features and advantages of the subject matter of the invention will become apparent from the subclaims and from the following description of the accompanying drawings, in which - as an example - a preferred embodiment of the invention is shown. In the drawing shows:

1 : Blank assembled from housing parts with polygon inside or polygon outer contour.

2 : two-part housing with connection surface and function carriers

3 : Section of a machine housing with a cross section of the connecting elements

The 1 shows the blank on the example of the classifier head ( 1 ) for a housing of a micro machine. In the case shown, the blank ( 1 ) from a central part ( 2 ) and a transverse part ( 3 ). The outer contour of the two parts is a polygon, here a triangle with rounded corners and edges. The inner contour of the central part also has the same polygon contour. The blank ( 1 ) is created by shrinking the middle part ( 2 ) with the transverse part ( 3 ). The polygon outer contours ( 4 . 5 ) are preferably made rotating and grinding. For this reason, at the middle part ( 2 ) and cross member ( 3 ) on both sides projecting pins ( 6 ) with centering holes ( 7 ) and flats ( 8th ) is mounted for receiving between tips and for driving. The polygon inner contour ( 9 ) is preferably produced by wire eroding.

The 2 shows the finished case ( 10 ), from the blank ( 1 ) to 1 arises. In the sectional view is in the center of the working space ( 11 ) can be seen. Across the workspace ( 11 ) form on both sides rotationally symmetric chambers ( 12 ) the fitting pieces ( 13 . 15 ) for receiving the drive and fines exit assembly with purge air supply chamber ( 14 ). For fixing the drive and the fine material outlet, tapped holes ( 16 ) is mounted for receiving pins in the area of thickening of the polygon contour. For attachment and supply of rinsing and working air, a polygonal receiving pocket (at the side of the polygon 17 ) with central mounting hole ( 18 ) and annularly arranged around the center holes ( 19 ) in the middle part ( 2 ) incorporated. The straight through hole ( 20 ) meets the annular purge air supply chambers ( 14 ). The starting from bore ( 21 ) right-angled rising hole ( 22 ) connects to the motive nozzle receiving chamber ( 23 ) ago. Similarly, the hole ( 24 ) the connection for the passage of the working air to a mill or Sichterunterteil ago. This eliminates out-of-machine lines or hoses. The feeding funnel ( 25 ) with supply line ( 26 ) to the workroom ( 11 ) is in the upper part of the blank ( 1 ) integrated. For receiving mill or Sichterunterteil is a cylindrical rotation ( 27 ) in the lower part of the housing.

The 3 shows the connecting element for fixing the machine components to each other. It is here the connecting element ( 28 ) from screw with conical end which replaces the bulky clamp connections. Due to the special shape not only the components are firmly connected to each other, but also aligned with each other through the conical end of the setscrews. In most cases, a fastener is sufficient.

LIST OF REFERENCE NUMBERS

1

blank

2

midsection

3

cross section

4

Vieleckaußenkonturen

5

Vieleckaußenkonturen

6

spigot

7

centering

8th

flats

9

Vieleckinnenkontur

10

casing

11

working space

12

both sides rotationally symmetric chambers

13

the functional surfaces

14

Spülluftzuführungskammern

15

mounting holes

16

threaded holes

17

Polygonal receiving bag

18

mounting hole

19

air holes

20

drilling

21

drilling

22

drilling

23

Blowing nozzle receiving chamber

24

drilling

25

hopper

26

supply

27

cylindrical rotation

28

Set screw

Claims (10)

Housing for process engineering machinery for receiving drive, working space with rotating working part and material application and product discharge characterized in that at least one housing part has a polygonal profile, and cylindrical inner bore different wall thicknesses, which assume different functions, with connection points to other parts of the system and / or housing parts Polygon profile are executed. Housing according to claim 1, characterized in that they are housings for mills, classifiers or mixers. Housing according to one or more of claims 1 to 2, characterized in that the polygonal profile is a polygon with rounded corners and curved sides. Housing according to one or more of claims 1 to 3, characterized in that the polygonal profile is a triangle with rounded corners and curved sides. Housing according to one or more of claims 1 to 4, characterized in that different thicknesses housing walls for receiving machine components, in particular driving nozzles and / or funnels for receiving material and / or scavenging, cooling water supply and / or discharges are used. Housing according to one or more of claims 1 to 5, characterized in that differently thick housing walls incorporated lines for operating media, in particular grinding air, purging air, and / or cooling water have. Housing according to one or more of claims 1 to 6, characterized in that wall thinnings represent connecting surfaces to other machine components, system parts or a supporting frame. Housing according to one or more of claims 1 to 7, characterized in that the housing has in wall thickenings threaded holes for receiving conical threaded pins for fixing housing parts and / or machine components. Housing according to one or more of claims 1 to 8, characterized in that the housing consists of at least two housing parts, which are joined together by shrinking. Housing according to one of claims 1 to 9, characterized in that the polygonal profile of housing parts or connecting surfaces represents a twist-proof and unique mounting position of the machine components.

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