Multi-stand two-roller reducing mill
A reducing machine and multi-stand technology, which is applied to metal rolling stands, metal rolling mill stands, and driving devices for metal rolling mills, can solve uneconomical problems, poor torque transmission effect of vertical transmission shafts, and overall Problems such as poor rigidity of the frame achieve the effect of easy maintenance
Active Publication Date: 2010-06-23
TAIYUAN TONGZE HEAVY IND
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Problems solved by technology
[0003] The present invention solves the problem of poor rigidity of the overall frame in the processing of large-diameter thick-walled seamless steel pipes in existing equipment. The thick-walled pipe requires a very large modulus and size design of the bevel gear, which makes the volume of the reducing machine very large, which is difficult to realize and very uneconomical, and the technical problem of poor torque transmission effect of the vertical transmission shaft
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[0015] The multi-frame two-roller sizing and reducing machine is composed of a main transmission part 1, a horizontal transmission device 2, a vertical transmission device 3, a main base 4 and an auxiliary machine 5. The main frame 4 adopts a frame-combined pre-tightening tension rod connection structure, and is composed of an upper beam 6, a side archway 7, a lower base 8, a left archway 9 and a right archway 10. The upper beam 6, the lower base 8, the left archway 9 and the right archway 10 are connected as a whole through the tie rod A11, and are positioned by the bushing 13; The tie rods B12 are connected as a whole; the upper beam 6 is supported by the left archway 9, the right archway 10 and the side archway 7, and is positioned by the branch and the bushing 13 to form a statically indeterminate structure. The vertical transmission device 3 mainly consists of a reversing bevel gear 14, a first-stage deceleration 15, a second-stage deceleration 16 and a transmission shaft...
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The invention belongs to a seamless pipe hot rolling device which relates to a multi-frame two-roll diameter reducing mill which solves the problems that the current device has the defect of poor rigidness of the integral frame when processing a large caliber thick wall seamless pipe; and if the large caliber thick wall pipe needs rolling, the modulus and size design of a conical gear are required to be very large, which causes the volume of the diameter reducing mill to be very huge which is hard to be realized and is not economical as well. The diameter reducing mill comprises a main transmission part (1), a horizontal transmission device (2), a vertical transmission device (3), a main frame (4) and an auxiliary mill (5); wherein the main frame (4) consists of an upper cross beam (6), aside torii (7), a lower base (8), a left torii (9) and a right torii (10) which are all connected together by a pretighting force connection rod and a reversing conical gear (14) is arranged between the main transmission part (1) and a first grade retarding device (15). The mill is especially suitable for the rolling of the large caliber thick wall seamless pipe.
Description
Technical field: [0001] The invention relates to continuous rolling production equipment for seamless steel pipes, in particular to a multi-stand two-roller diameter reducer, which is used for fixed diameter reduction production of hot-rolled seamless steel pipes. Background technique: [0002] At present, in the continuous rolling production equipment of seamless steel pipes in metallurgical enterprises, the sizing and reducing machine is one of the key finishing equipment for continuous rolling production of seamless steel pipes. After hot rolling, the steel pipe needs to be reduced, rounded and sized by a sizing and reducing machine, and finally rolled into a seamless steel pipe product. In the prior art, the frame of the two-roller reducer used in the rolling thick-walled seamless steel pipe unit is a C-shaped integral frame. In the structure of the vertical transmission device of the reducer, the bevel gear is placed in the last Stage transmission, the weight of the tr...
Claims
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IPC IPC(8): B21B31/04B21B31/06B21B35/12
Inventor 刘四虎徐伟
Owner TAIYUAN TONGZE HEAVY IND