DE813394C - Extendable two-part iron pit stamp - Google Patents

Extendable two-part iron pit stamp

Info

Publication number
DE813394C
DE813394C DEP9971A DEP0009971A DE813394C DE 813394 C DE813394 C DE 813394C DE P9971 A DEP9971 A DE P9971A DE P0009971 A DEP0009971 A DE P0009971A DE 813394 C DE813394 C DE 813394C
Authority
DE
Germany
Prior art keywords
pit
punch
wall thickness
extendable
tubes
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEP9971A
Other languages
German (de)
Inventor
Alfons Barenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to DEP9971A priority Critical patent/DE813394C/en
Application granted granted Critical
Publication of DE813394C publication Critical patent/DE813394C/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/502—Prop bodies characterised by their shape, e.g. of specified cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Description

Die Erfindung bezieht sich auf zweiteilige eiserne Grubenstempel, welche aus zwei ineinander verschiebbaren Rohren bestehen. Die Stempel dieser Art haben gegenüber anderen aus profiliertem Eisen erhebliche Vorzüge. So ist der Rohrquerschnitt für Ober- und Unterstempel statisch am günstigsten, weil die Steifigkeit des Rohres gegen Biegung und Knicken bei einer gegebenen Werkstoffmenge am größten und nach jeder Richtung gleich ist. Das Rohrprofil läßt sich gut anfassen, so daß der Stempel handlich ist.The invention relates to two-part iron pit punches, which consist of two telescopic tubes. The stamps of this kind have considerable advantages over others made of profiled iron. So is the pipe cross-section statically most favorable for upper and lower punches because of the stiffness of the tube against bending and buckling for a given amount of material at its greatest and after is the same in every direction. The pipe profile can be easily touched, so that the stamp is handy.

Man kann das Gewicht der Stempel besonders bei größeren Betriebsbelastungen noch erheblich vermindern und somit einen leichteren Strebausbau verwirklichen, wenn die ineinander verschiebbaren Rohre in ihrer Längsrichtung eine veränderliche Wandstärke aufweisen, die in dem jeweils kritischen Querschnitt entsprechend der mit der Stempellänge zunehmenden Knickbelastung wächst.You can check the weight of the stamp, especially when there is a lot of workload still considerably reduce and thus realize a lighter face construction, when the telescoping tubes are variable in their longitudinal direction Have wall thickness that corresponds to the critical cross section in each case the kinking load increases with the punch length.

Ein erfindungsgemäß ausgestalteter Grubenstempel ist in der Zeichnung in einer beispielsweisen Ausführungsform im Längsschnitt dargestellt.A pit punch designed according to the invention is shown in the drawing shown in an exemplary embodiment in longitudinal section.

Die analog der Knick- bzw. Biegebeanspruchung verlaufende Wandstärke kann auf verschiedene Weise gebildet werden. Es ist möglich, zwei oder mehrere Rohre 3, 4, 5 von verschiedener Länge satt ineinanderzulegen, wobei ein Zwischenraum möglichst vermieden werden muß. Auf das längste äußere Rohr 3 wird der Stempelkopf gesetzt. Beim Ausziehendes Oberstempels verstärkt sich durch Mitausziehen der inneren kürzeren Rohre die Wandstärke in der Mitte des Rohrstempels, also im kritischen Querschnitt, so daß bei einer größeren Belastung und bei einer größeren Stempellänge die Knickungen und Biegungen des äußeren Rohres vermieden werden. Die entsprechend der Betriebsbelastung sich verändernde Rohrwandung kann auch auf dem Wege des Schleudergusses gebildet werden, indem beispielsweise die Schleudergußkokille eine der beabsichtigten Form entsprechende Neigung erhält. Ein weiteres Verfahren zur Anfertigung eines Rohres als Unter- oder Oberstempel im Sinne der Erfindung besteht darin, daß man ein Band rohrförmig aufwickelt, welches verschiedene Breite besitzt.The wall thickness running analogously to the buckling or bending stress can be formed in different ways. It is possible to have two or more pipes 3, 4, 5 of different lengths to fit into one another, with a gap if possible must be avoided. The punch head is placed on the longest outer tube 3. When the upper punch is pulled out, the shorter inner punch is reinforced by pulling out at the same time Pipes is the wall thickness in the middle of the pipe punch, i.e. in the critical cross-section, so that with a greater load and with a greater punch length the kinks and bends in the outer tube are avoided. Which according to the operational load changing pipe walls can also be formed by centrifugal casting be, for example, by the centrifugal casting mold one of the intended shape corresponding inclination receives. Another method of making a pipe as a lower or upper punch within the meaning of the invention consists in the fact that a tape wound tubular, which has different widths.

Claims (4)

PATENTANSPRÜCHE: i. Ausziehbarer zweiteiliger eiserner Grubenstempel aus zwei ineinander verschiebbaren Rohren, dadurch gekennzeichnet, daß die Rohre (i, 2) in ihrer Längsrichtung eine veränderliche Wandstärke aufweisen, die in dem jeweils kritischen Querschnitt entsprechend der mit der Stempellänge zunehmenden Knickbeanspruchung wächst. PATENT CLAIMS: i. Extendable two-part iron pit stamp of two tubes which can be displaced one inside the other, characterized in that the tubes (i, 2) have a variable wall thickness in their longitudinal direction, which in the each critical cross-section corresponding to the increasing with the punch length Buckling stress increases. 2. Grubenstempel nach Anspruch i, dadurch gekennzeichnet, daß die sich verändernde Wandstärke durch Ineinanderschieben von zwei oder mehreren satt ineinanderliegenden Rohren (3, 4, 5) verschiedener Länge gebildet ist. 2. Pit punch according to claim i, characterized in that that the changing wall thickness by sliding two or more into one another nested tubes (3, 4, 5) of different lengths is formed. 3. Grubenstempel nach Anspruch i, dadurch gekennzeichnet, daß die sich verändernde Wandstärke durch Anwendung des Schleudergießens gebildet ist. 3. Pit stamp according to claim i, characterized in that the changing wall thickness by Application of centrifugal casting is formed. 4. Grubenstempel nach Anspruch i, dadurch gekennzeichnet, daß die Rohrwandung durch ein aufgewickeltes Band gebildet ist, dessen Breite entsprechend der Betriebsbelastung in den einzelnen Querschnitten zu- bzw. abnimmt.4. pit punch according to claim i, characterized characterized in that the pipe wall is formed by a wound tape, its width according to the operating load in the individual cross-sections increases or decreases.
DEP9971A 1948-10-02 1948-10-02 Extendable two-part iron pit stamp Expired DE813394C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP9971A DE813394C (en) 1948-10-02 1948-10-02 Extendable two-part iron pit stamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP9971A DE813394C (en) 1948-10-02 1948-10-02 Extendable two-part iron pit stamp

Publications (1)

Publication Number Publication Date
DE813394C true DE813394C (en) 1951-09-13

Family

ID=7362599

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP9971A Expired DE813394C (en) 1948-10-02 1948-10-02 Extendable two-part iron pit stamp

Country Status (1)

Country Link
DE (1) DE813394C (en)

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