34results about "Length control device" patented technology

The invention provides a rolling method and a rolling device for a steel plate with uneven thickness. The rolling method of the uneven-thickness steel plate provided by the invention can improve the yield of the uneven-thickness steel plate. The margin length of the thin portion is calculated based on the actual side cross-sectional area of ​​the thick portion calculated at the time of primary rolling (step ST1 ) (step ST7 ). Next, the rolling length of the thin portion is calculated so that the remaining side cross-sectional area is allocated to the thick portion and the thin portion according to the spare length of the thin portion (step ST8 to step ST12 ). Then, secondary rolling is performed by the calculated rolling length LX (Sx) of the thin portion.

Provided is a method for rolling differential thickness steel sheets, the method being capable of improving the yield of differential thickness steel sheets. The excess length of the thin-walled section is calculated (Step (ST7)) on the basis of the observed cross-sectional area of the thick-walled section calculated at the time of a primary rolling (Step (ST1)). Next, the rolled length of the thin-walled section is calculated (Step (ST8) - Step (ST12)) so that the excess cross-sectional area is distributed between the thick-walled section and the thin-walled section in accordance with the excess length of the thin-walled section. Then, a secondary rolling is performed using the calculated rolled length (LX(Sx)) for the thin-walled section.

The invention provides a PLP strip fixed-length conveying measurement device and method, and belongs to the technical field of rolling. The device comprises a clamping roller, a length measurement coder, a position sensor used for detecting a roller seam of the clamping roller and a computer control system having a pulse calibration manner and a fixed-length conveying manner. According to the control method, by identifying changes of the roller seam of the clamping roller, the unit pulse length of the length measurement coder of the clamping roller can be corrected in real time, high-accuracy length measurement of a PLP strip is achieved, and the measurement length error is smaller than + / -0.5 mm; and the number of shorn finished product unequal thickness plates between two times of adjustment of the PLP strip can be effectively increased.

The invention discloses an automatic cutting machine of steel pipe welding coiled materials. The automatic cutting machine of the steel pipe welding coiled materials comprises a reverse arc-shaped straightening mechanism, a hydraulic driving type electric clutch feeding mechanism, a left-right position adjusting mechanism, a hydraulic cylinder connecting rod cutting mechanism and a rack. The hydraulic cylinder connecting rod cutting mechanism and the reverse arc-shaped straightening mechanism are arranged at the front end and the rear end of the rack respectively, the left-right position adjusting mechanism is arranged at the position, arranged on the rear side of the hydraulic cylinder connecting rod cutting mechanism, of the rack, the hydraulic driving type electric clutch feeding mechanism is arranged on the rear side of the left-right position adjusting mechanism, and the hydraulic driving type electric clutch feeding mechanism is arranged on the rack. According to the mode, a steel plate of the whole coiled material can be straightened and rolled to be flat, the parallelism degree is corrected, and a diamond steel plate is prevented from being cut out.

The invention discloses a method for controlling a thickness of a hot-continuous-rolled intermediate slab and a length of a cast ingot, and relates to the technical field of metal pressure machining. The method comprises the following steps: according to a set rolling pass reduction rate of each frame of a continuous rolling machine and a thickness of a finished rolled piece, a thickness reference value of the intermediate slab and a rolling pass reduction quantity of each frame are inversely computed; the rolling force checking and the correction are performed for the thickness reference value of the intermediate slab; if calculated rolling force exceeds a maximum rolling force allowed value allowed by each frame, the rolling pass reduction quantity is reduced, and the iterative computation is repeated until the calculated rolling force is lower than or equal to the maximum rolling force allowed value; then, the correction calculation is performed for the thickness reference value of the intermediate slab, and a rough rolling machine is used for rolling to reach the calculated thickness of the intermediate slab; according to the corrected thickness value of the intermediate slab, a length of a roller way from the rough rolling machine to a continuous rolling machine, and a thickness of the cast ingot, the length of the cast ingot is calculated; and the cast ingot is cast according to the calculated length of the cast ingot. The method solves the problem of low yield in traditional hot continuous rolling production.

A method for controlling a bar processing mill having an exit and a cooling bed to produce bars of a predetermined cold length. The method includes, for a first bar in a processing order, calculating a long hot cut length based, at least in part upon a predetermined cold length . In addition, the method includes adjusting the long hot cut length based on a total length of bar exiting the exit, if the long hot cut length is greater than a minimum cooling bed length , and if a number of layers of bars to be processed on the cooling bed is less than a predetermined number.

The invention relates to the technical field of thread rolling machines, in particular to a multifunctional thread rolling machine, comprising a transmission device, a support box, a motor, an extension shaft, a linkage plate, a first adapter seat, a second adapter seat, a thread rolling shaft, The adjusting plate, the sliding shaft, the two connecting plates, the electric push rod and the frame plate, the left and right parts of the frame plate are provided with first elongated holes, and the middle of each first elongated hole is provided with a support shaft, and each support shaft The rear part is connected with a fixing nut through a thread, and the front part of each support shaft is sleeved with an extension plate, the middle part of the extension plate is provided with a second elongated hole, each support shaft passes through the corresponding second elongated hole, and the upper part of each extension plate is Photoelectric sensors are installed in all of them, and the front part of the support shaft is connected with a clamping nut through a thread, and the rear end of the clamping nut is in contact with the front end of each corresponding extension plate; it is convenient to adjust the height of the bottom support part, and it is convenient to determine the length of the thread processed on the part, It is convenient for users to operate and has high processing efficiency.