Reinforcement wire wound inner concave beam frame
A technology of prestressed steel wire and frame, applied in the direction of presses, forging/pressing/hammering machinery, manufacturing tools, etc., can solve the problem of increasing the overall height of the frame, increasing the weight of the beam, and the design and application of the prestressed steel wire winding frame Increase the limiting factors and other issues to achieve the effect of improving the overall stability, reducing the weight of the rack, and reducing the overall height
Inactive Publication Date: 2011-07-20
TSINGHUA UNIV
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Problems solved by technology
But its disadvantage is that the weight of the beam increases, the stress concentration exists at the sudden change of shape, and the length of the column needs to be increased to ensure sufficient working space for the press, thus increasing the overall height of the frame
[0010] Several existing beam structure racks have their own advantages, but they all have shortcomings, which add restrictive factors to the design and application of prestressed steel wire winding racks
Method used
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Embodiment 1
[0057] Example 1: Design of 25MN free forging / fast forging hydraulic press prestressed steel wire winding concave beam
[0058] The frame adopts concave beam structure, calculation model parameters: R=2025mm, w=600mm, b=700mm, P c =2508t, then the value range of s is [0, 1425]. From the above derivation, the stress σ at the bottom of the beam can be obtained c (0) and the concavity depth s as shown in Figure 7 shown. The larger the value of s, the smaller the tensile stress at the bottom of the beam. When s≥1182mm, σ c (0)<0, there is no tensile stress on the bottom of the beam under the pre-tensioned state. The actual overall weight is about 112t, the total height is about 11.06m, the total width is about 4.05m, the concave depth of the upper beam is about 0.4m, and the concave depth of the lower beam is about 0.285m. Compared with the semicircular beam structure with the same outer edge size, the overall height of the frame of this beam structure is reduced by about 0...
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Abstract
The invention provides a reinforcement wire wound inner concave beam frame. Sections of an upper beam 1 and a lower beam 2 are all in inversely concave shapes; an inner margin of the beam comprises a base plane 6 and two transition arc surfaces 5; an outer margin 4 of the beam and an inner margin arc 5 are positioned on the same side of the diameter 7 of an outer margin arc of the beam. The innerconcave beam of the frame has simple structure, is easy to be processed and assembled, effectively utilizes space, reduces the overall height of the frame, improves the overall stability and lightensthe weight. The inner margin structure of the beam, which is determined suitable, can ensure that the beam has relatively small tensile stress under any state, thereby improving the fatigue strength of the beam, being a comparatively ideal beam structure frame with controllable low tensile stress and having wide application prospect.
Description
technical field [0001] The invention belongs to the bearing equipment structure used in industrial fields such as heavy equipment and heavy machinery, and in particular relates to a prestressed steel wire winding frame. Background technique [0002] The concave beam frame referred to in the present invention is a kind of prestressed steel wire winding frame. [0003] The characteristic of the prestressed steel wire winding frame is that the original whole frame is divided into upper beam, lower beam and columns on both sides to manufacture separately, and then the prestressed steel wire layer is applied to wind the whole. It has good fatigue strength and high bearing capacity, which reduces the difficulty of processing and manufacturing and is widely used. Its structural diagram is as figure 1 As shown, under the action of the pre-tightening force of the wound steel wire layer, the column remains under compression in any state, which effectively reduces the possibility of ...
Claims
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IPC IPC(8): B30B15/04B21J13/04
CPCB30B15/042
Inventor 林峰颜永年张人佶张磊林智琳韩俊明李志波单东升苏鹏程
Owner TSINGHUA UNIV