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Closed type three poles framework for support

A bearing machine and closed technology, applied in the direction of metal rolling frame, press machine, metal rolling mill stand, etc., can solve the problem that the four-bar frame cannot effectively use the space, the four-bar system frame is not suitable, and the material utilization rate Low and other problems, to achieve the effect of improving rack space utilization, simple structure, and reducing processing costs

Inactive Publication Date: 2006-02-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The biggest disadvantage of the four-bar rack is that it cannot effectively use the space and the material utilization rate is low
The span value determines the height, weight and processing, transportation and installation costs of the beam, so it is very unreasonable and causes huge waste
[0005] The space required by various load-bearing frames to generate pressure is less than the space required to install molds and material forming, which makes the four-bar system frame unsuitable for many working conditions, especially the load-bearing frame of a wide table and small tonnage press

Method used

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  • Closed type three poles framework for support
  • Closed type three poles framework for support
  • Closed type three poles framework for support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Frame design of 6000 ton open die forging press

[0041] As mentioned above, the single cylinder 6000 ton free forging hydraulic press frame L M =4.6m, L C=1.7m, λ = 4.6 1.7 = 2.7 , Therefore, it is more appropriate to design a three-bar rack.

[0042] Figure 14 Among them, a, c and e form a three-bar rack with parallel local axes. b, d and f are the transition blocks added for connecting the bar system, K 1 、K 2 、K 3 、K 4 、K 5 and K 6 It is the joint surface of the hurdle, and 2 is the pre-tightened steel wire layer. The frame can withstand a working load of 6,000 tons and weighs only 400 tons, while the frame of a traditional 6,000-ton free forging press weighs at least 800 tons.

Embodiment 2

[0043] Example 2: 1250-ton press frame design

[0044] The four-column frame of the 1250-ton open-die forging press adopts a design of 330kg / cm 2 Working oil pressure, the working outer diameter of a single master cylinder is Φ820mm, namely L c =820mm, while the forging space scale is 1940mm, L M =1940mm

[0045] λ = L M L C = 1940 820 = 2.36

[0046] Therefore, it is more reasonable to design the frame of the 1250-ton free forging hydraulic press as a three-bar frame, which is 40 tons lighter than the four-bar frame. Figure 15a For a traditional four-post rack, Figure 15b It is a three-bar rack with the same drawing scale. The former has 4 columns of Φ300; the latter is only designed with two hollow columns, the upper beam is greatly reduced, and the movable beam and lower beam are sm...

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Abstract

Disclosed is an enclosed type three-member load frame, which comprises an inderbeam and two columns of unparalleled axis, the three columns connecting by prestressed linkage and non-prestressed linkage. The three-member load frame has a plural of derivative types, such as axis partial parallelism, arc column type, arc beam type, and their composite type. The three-member load frame has a small space in the upper and a large space in the lower, having a high availability ratio of space in the situation that space required for producing parts by pressure is much less than the mould space of material, and especially suit for a broad field, such as free hammer press frame, sheet drawn forming press frame, and so on.

Description

technical field [0001] The invention belongs to bearing equipment used in industrial fields such as heavy equipment and heavy machinery, and in particular relates to a closed bearing frame. Background technique [0002] The closed frame structure referred to in the present invention is a closed load-bearing frame, which is used for rolling mill load-bearing frames, mechanical press frames, friction press frames, hydraulic press frames, counter-hammer frames and electric screw hammer machines. racks and so on. Since the industrial revolution in the 19th century, all closed load-bearing frames can be simplified to a structure composed of four rods, such as figure 1 shown. The vertical members are called columns, and the horizontal members are called beams. There are two beams and two columns. The load on the beam and column can be approximately simplified as the load P and moment M perpendicular to the axis of the member, and some of P and M on the four members can be zero....

Claims

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Application Information

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IPC IPC(8): B21B31/02B30B15/04
Inventor 颜永年林峰吴任东彭俊斌卢清萍张人佶袁达熊卓王小红
Owner TSINGHUA UNIV
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