DE2017676A1 - Press frame with rectangular cross headand base sections - Google Patents

Abstract

The base and cross head sections of the frame are provided with saw tooth like transverse profiles on two parallel opposite sides faces, and connected via tension plates, which have corresponding profiles to engage on the two sections. Additional pressure elements act onto the top and lower edges of each plate. The unprofiled side sections of the base and cross head, which project into the working space, also carry additional pressure elements to act onto the tension plates. The press frame is of much lighter construction than the normal frames, can withstand larger forces, and is to be used in hydraulic-, isostatic-, and extrusion presses, die casting machines, compressors, etc.

Description

Pre 55 enrahmen The invention relates to a press frame with preferably rectangular shaped base and head piece.

Presses are used for various work processes, whereby the pressing elements in a steel frame construction, especially in the area of high tensile forces are arranged in a welded or shrunk design. The headpiece of the The steel frame is connected to the base piece via steel anchors to form a rigid frame tied together.

Such frame constructions are no longer sufficiently robust against breakage at the high forces required for modern presses, since at the transition high stress peaks occur from the steel anchors to the top and bottom pieces tearing off the steel anchors in the area of the screw connection with the head and bottom pieces being able to lead.

Another major disadvantage is that it is conventionally heavy Construction of the steel frame, whereby the large tensile forces have been controlled so far.

It has now been found that the press frame in a much lighter Construction can be extended for the same and higher forces if according to the invention that on two mutually opposite, parallel side surfaces a saw-like transverse profile provided with the base piece on the corresponding Side surfaces with a saw-like cross-section head piece connected via two tension plates is the one with a counter-profile attached in the area of the base and head piece engage in the profile of the base and head piece, with the play between the Flanks of the interlocking saw-like profiles performed differently is to achieve an even distribution of force over the entire profile.

For each tension plate in the transition area from the profiling in the smooth part in the loaded state occurring bending moments are due to the upper and lower outer edge of each tension plate acting from the outside to the inside additional pressure elements, as well as on the unprofiled surface parts protruding into the work area of the profiled side surfaces of the top and bottom pieces arranged from the inside to the bottom External pressure elements acting on the tension plates are influenced in such a way that in the area the notch effect, the tensile forces remain zero.

The interlocking profiles of the tension plates, top and bottom pieces are held together by screw connections.

The invention is and is exemplified in the drawing explained in more detail below: The rectangular shape on two opposite one another parallel side surfaces with saw-like transverse profiling 4 provided head piece 1 is with the saw-like cross-profiled base piece on the corresponding side surfaces 2 connected via two tension plates 3. The tension plates 3 point in the area of the head -l and bottom piece 2 a saw-like counter-profiling with which it is in the Engage the profile of the head and bottom pieces.

At the ends of the tension plates 3 is a right-angled bar 5 attached, on which one acting on the outer edge of the tension plate from the outside to the inside Additional pressure element 6 is attached.

Another additional pressure element that acts on the tension plates from the inside to the outside 7 is in each case on the unprofiled surface parts protruding into the work space 8 the profiled side surfaces of the head -1 and bottom piece 2 attached.

The advantages achieved with the invention are in particular: that the bending moments in the tension plates are influenced by additional forces, that the tensile forces in the area of the notch effect remain zero.

Compared to the press frame belonging to the state of the art the press frame according to the invention executed in a much lighter design and at the same time absorb greater forces.

(Patent claims)

Claims (3)

Claims 2. press frame with preferably rectangular Lopf and bottom piece, characterized in that on two opposite parallel extending side surfaces provided with a saw-like transverse profile (4) Bottom piece (2) with the cross-profiled saw-like profile on the corresponding side surfaces Head piece (1) over two in the area of the head (l) and bottom piece (2) with a saw-like Counter-profiling engaging in the profiles of the head (l) and bottom piece (2) provided tension plates (3) is connected, wherein in the area of the upper and lower Outer edge of each tension plate (3) acting from the outside to the inside on the tension plate (3) Additional pressure element (6) is arranged, and that on the in the working space (8) protruding unprofiled surface parts of the profiled side surfaces of the head (l) and base piece (2) from the inside to the outside acting on the tension plate (3) additional pressure element (7) is located. 2. Press frame according to claim 1, characterized in that the interlocking profiles (4) of tension plates (3), head (l) and bottom piece (2) Screw connections are held together and designed so that the game between the flanks of the interlocking saw-like profiles performed differently is to achieve an even distribution of force over the entire profile. 3. Using the press frame for hydraulic presses, isostatic Presses, extrusions, injection molding machines, pumps, compressors, etc.