30results about How to "Bite smoothly" patented technology

The invention provides a vertical mill inlet shared induction device, which consists of a fixing bracket, a guide body, an upper supporting arm, a lower supporting arm, a guide roller, a guide roller opening adjusting mechanism and a guide body horizontal movement mechanism, wherein the billet moves in a space formed by the upper and lower supporting arms and a side baffle, is guided by the guide roller and the side baffle and is correctly engaged with a rolling mill; when the milling specification is changed, an adjusting handle is rotated, the upper supporting arm drives the upper guide roller to lift to meet the novel specification requirement; the supporting arm stretches into two rollers on an inner frame, the guide plate body moves backwards in the process of replacing the rollers, and the supporting arms and the guide rollers retract the rollers and the arch of the inner frame; and therefore, the guide device is not required to be replaced in the process of replacing the rollers, the roller replacing time can be obviously shortened, the operate rate of the rolling mill is improved, the service life of the guide device is greatly prolonged, the storage and consumption of spare parts are reduced, and the production cost is reduced; and meanwhile, the scratch defect on the surface of a rolled piece can be overcome, and the quality of the finished rolled product is improved.

The present invention provides a slider-type expansion bolt, comprising: a bolt body, an outer casing, and a nut; the outer casing is arranged outside the bolt body; the nut cooperates with the bolt body; A washer and a spring pad are provided, wherein the outer sleeve is provided with a sliding hole, and a slider is installed in the sliding hole, and when the nut drives the bolt body to move, the bolt body can push the slider The block slides outward to lock. The present invention drives the bolt body to rotate outward through the nut, and the front part of the bolt body pushes the slider to slide outward so that the slider can be inserted into the wall. Since the slider of the device slides outward and is inserted into the wall, the depth is relatively deep. , When used on materials with low hardness such as: hollow bricks, wood, cardboard, rubber, etc., it can also produce deeper bites and can be firmly fixed.

A composite polyester fiber and a preparation method thereof have been disclosed. The composite polyester fiber includes a fiber body and a microcapsule uniformly formed in the fiber body; the microcapsule includes a microcapsule core material and a microcapsule wall material coated on the microcapsule core material; The capsule core material includes the following components by weight percentage: 20-40wt% of polyester enzyme bacteria, 10-60wt% of vegetable sesame oil, 10-20wt% of sucrose ester; polyester enzyme bacteria can metabolize to produce polyester enzyme; microcapsule wall material is edible of natural polymer materials. The preparation method of composite polyester comprises the following steps of preparing microcapsule wall material hydrosol, preparing polyester enzyme bacteria, preparing microcapsule core material water emulsion, preparing microcapsule and preparing polyester. The composite polyester obtained by the above technical solution has good stability in the presence of microcapsules in the fiber body, and the composite polyester product can attract microorganisms in the environment to eat the microfibers after being discarded, thus solving the problem that polyester cannot be degraded. However, there are problems that endanger the ecological environment.

The invention relates to an aluminum hot rolling and rough rolling head pressing technology and an automatic head pressing control method. According to the site production conditions that when rolling is conducted on a heavy shearing pass, the head of a blank is seriously opened; a roller bed between a rough mill and a finishing mill is short; and when five-system aluminum alloy is rolled, the head rises seriously in the pass which is conducted after the heavy shearing pass, the control method that automatic head pressing is conducted on the heavy shearing pass, the end pass and the pass (not containing the end pass) which is conducted after the heavy shearing pass when the five-system aluminum alloy is rolled is provided. According to the aluminum hot rolling and rough rolling automatic head pressing control method, by controlling head pressing automatically, impact of the head of the blank on equipment is reduced, successful biting of the finishing mill is ensured, the risk that the blank is wound when the five-system aluminum alloy is rolled is reduced, and guarantee is supplied to successful operation of the whole production line.

The invention discloses a special steel large bar rolling line and rolling method, using a semi-continuous rolling rolling production line of "7 racks rough rolling + head-off roller table + 8 racks intermediate finishing rolling", specifically including sequentially setting The 1# pinch roll, rough rolling unit, hydraulic shear, head-off roller table, 2# pinch roll, middle finishing rolling unit and double-length shear. The 7 rough rolling stands are arranged alternately, using two-roller short stress line rolling mill, 1#-2# roll diameter φ950mm, cast steel rolls that can be surfacing, and 3#-4# roll diameter φ800mm, cast steel can be surfacing Roll, 5#-7# rolling mill roll diameter φ700mm, using pearlitic nodular molybdenum cast iron II roll. The 8 middle finishing mills are alternately arranged horizontally and vertically and all adopt two-high short stress line rolling mills. The rolling process based on this rolling line can not only ensure the quality of special steel large bars, but also improve the production efficiency of the large bar production line, and greatly reduce the investment cost of the production line.

The invention relates to a tube mill, in particular to a feeding device on the front stand of an ASSEL tube mill, which comprises a guide rail part, a feeding part and a driving mechanism, wherein the guide rail part is arranged on the front stand of the ASSEL tube mill; the feeding part can move reciprocally along the guide rail part and is positioned on the outer side of the front stand of the ASSEL tube mill in a horizontal direction; and the driving mechanism can drive the feeding part. The feeding device of the ASSEL tube mill has a simple structure and is convenient for installation and regulation; in a horizontal direction, the feeding device is positioned on the outer side of the front stand of the ASSEL tube mill, which is very favorable for the conveying of tubular billets and prevents tubular billets with a diameter phi of more than 270 millimeters from sliding during conveying; and in a rolling process, the feeding device ensures the smooth biting of the tubular billets and the normal tube rolling and improves production efficiency.

The invention relates to a method for controlling the stable coiling of hot-rolled high-strength steel heads, which comprises the following steps: the steel strip is subjected to a dry-heading process in the laminar flow cooling process; the control system sets the steel head tracking distance value; the control system sets the first The first waiting position of the first winding-assisting roller and the second waiting position of the second winding-assisting roller; the first winding-assisting roller, the second winding-assisting roller and the third winding-assisting roller perform stepping actions according to the tracking distance value of the steel head; the mandrel During the pre-expansion process, the control system controls the diameter of the mandrel to expand from the initial value to the pre-expansion value, and the range of the pre-expansion value is 745-750mm. This control method can ensure that the head of the high-strength steel can enter the coiler stably and smoothly, prevent the head from rubbing against related equipment and cause the strip to stop running, and avoid stacking steel accidents.

The invention relates to a pinch roll for pipes and bars. The shape of the circumferential surface of the roll comprises an improved hyperbolic curve as the upper part and an oval curve smooth transition as the lower part, wherein the improved hyperbolic curve of the upper part is as follows: cos<2>alphaX<2>-deltaY<2>=deltad<2>; and the oval curve of the lower part is as follows: cos<2>alphaX<2>+Y<2>=d<2>; wherein d is the diameter of a cylindrical blank, alpha is the included angle between the central axis of the roll and the central axis of the cylindrical blank, delta is a coefficient witha numerical range of 0.5-1, X represents a major axis, and Y represents a minor axis. In the pinch roll, two rollers of the pinch roll device and the cylindrical blank are arranged crosswise, and theself rotation of the rollers drives the cylindrical blank to move forward. By using the technical scheme, the roll curved surfaces of the rollers are brought in good contact with the blank. Thereby, the contact rate is ensured to the greatest extent, and the roll bite is smooth in the rolling process.

The invention relates to the field of control of a rolling process, in particular to a gripping control method in a rolling process of a heavy rail. The gripping control method in the rolling process of the heavy rail is characterized in that the rotation speed of a main motor of a universal rolling mill is adjusted, so that a rolling piece obtains enough kinetic energy and grips a hole of a UR roller. The particular operation steps are as follows: (1) before the rolling piece enters the UR roller of the universal rolling mill, hole water is closed, and an automatic rolling program of the universal rolling mill is stopped; (2) after the rolling piece arrives transversely, the rotation speed of the main motor of the universal rolling mill is improved to 100-110 turns per minute; (3) the rolling piece is abraded on the UR roller for 30-40 seconds, and then the rotation speed of the main motor of the universal rolling mill is reduced to 10-20 turns per minute until the rolling piece grips the hole; and (4) after the rolling piece grips the hole by 2-3 meters, the rolling pieces is poured out by hand, and the automatic rolling program of the universal rolling mill is recovered. Compared with the prior art, the gripping control method in the rolling process of the heavy rail has the advantages of enabling the rolling piece to grip the hole of the UR roller smoothly, achieving intelligent control, and being suitable for the heavy rail with the level of more than 50 kilos.