Mounting method of large pressure machine prestressed draw-bar
A technology of prestressed tie rods and installation methods, which is applied to presses, manufacturing tools, etc., can solve problems such as inability to install, limited lifting space, and large volume, and achieve the effects of saving installation costs and controlling prestress
Active Publication Date: 2008-01-16
一重集团(黑龙江)重工有限公司 +1
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Problems solved by technology
[0002] At present, the installation of prestressed tie rods of large three-beam and four-column presses is large in size and heavy in weight, especially for 150MN hydraulic presses with a working stroke of 4 meters, a single tie rod length of 22 meters, and a single tie rod weight of 75 tons. The lifting space is limited and cannot be hoisted normally. , with high precision in installation and cooperation with related components, large-diameter screws and nuts are cold-connected and fastened beyond the range, the pre-tightening torque cannot be controlled, and it cannot be installed according to the normal installation method
Method used
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Embodiment Construction
[0011] Please refer to Fig. 1-Fig. 3, prefabricated 4 foundation process pits (11) in the large-scale press concrete foundation; Pull bar (1) is placed between two skids (5), (6) earlier, draw bar Place the counterweight (7) at one end of (1), install the suspension shaft (4) on the upper end of the square column (2), hoist the square column (2) horizontally, hang the middle and lower section of the tie rod (1), and adjust the counterweight After the pull rod (1) is balanced, the square column (2) is inserted into the pull rod (1), the upper nut (3) is screwed on the upper end of the pull rod (1), and the pull rod ring (20) is connected to the top of the pull rod (1). Install the base (10) on the concrete foundation of the press, lift the installed square column (2) together with the pull rod (1), put the pull rod (1) vertically into the mounting hole of the base (10), and place it on the base (10) exposed under the installation hole, screw in the lower nut (19) at the bottom ...
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The invention relates to an installation method of a large-sized forcing press prestressed tie rod, belonging to the large-sized forcing press technical field. Preset four artistic base delves on the concrete base of the large-sized forcing press; hitch the square poles onto the tension rods and screw the upper nuts at the upper ends of the tension rods whose flying rings are connected to the tops of the tension rods; install a pedestal on the concrete base of the large-sized forcing press and then hang the assembled square poles and the tension rods; place the tension rods vertically into the installation holes of the pedestal, letting the tension rods stretch out of the installation holes; screw lower nuts at the bottoms of the tension rods, remove the upper nuts and then hang the flying rings of the tension rods and place the tension rods into the artistic base delves gently, making the upper planes of the tension rods lower than the tops of the square poles; place the square poles rightly into the installation holes on the pedestal; after the assembling of the four tension rods and the four square poles, hang the flying rings of the tension rods to sling the tension rods, making the tension rods exceeding an upper beam; screw the upper nuts and after the installation of the four tension rods, lay a stretcher and adjust the angle to tighten the stretcher.
Description
technical field [0001] The invention relates to a method for installing a prestressed tie rod of a large press, in particular to a method for installing a prestressed tie rod of a large press with three beams and four columns, and belongs to the technical field of large presses. Background technique [0002] At present, the installation of prestressed tie rods of large three-beam and four-column presses is large in size and heavy in weight, especially for 150MN hydraulic presses with a working stroke of 4 meters, a single tie rod length of 22 meters, and a single tie rod weight of 75 tons. The lifting space is limited and cannot be hoisted normally. , The installation and cooperation with related components are of high precision, the cold connection and fastening of large-diameter screws and nuts exceeds the range, the pre-tightening torque cannot be controlled, and it cannot be installed according to the normal installation method. Contents of the invention [0003] Aimin...
Claims
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Inventor 隋毅李冰宋克史永利
Owner 一重集团(黑龙江)重工有限公司