134 results about "Speeds and feeds" patented technology

The present invention provides an S-shaped acceleration and deceleration control method for changing speed and position of an object on line. The method comprises the acceleration phase speed planning, the deceleration phase speed planning, the constant speed phase speed planning, the real speed reduction point predication, the maximum speed processing, the surplus distance compensation, the online object speed changing algorithm and the online object position changing algorithm. An acceleration and deceleration discretization speed planning method is employed and the user input parameters are combined to calculate the operation time of a seven-phase speed planning phase. It is determined whether the maximum acceleration and the maximum speed can reach the criterion or not, the integration problem of a sampling period Ts according to the acceleration / deceleration acceleration, the acceleration / deceleration speed and the final position L after discretization is considered, and the real reachable acceleration / deceleration acceleration, the acceleration / deceleration speed and the feed rate are corrected. The S-shaped acceleration and deceleration control method for changing speed and position of the object on line greatly simplifies an original calculation formula and saves lots of operation time of a computer, and the surplus distance employs a one-time compensation method in the speed reduction process.

A PCD drill for producing close tolerance holes in multi layer laminates, such as carbon fiber reinforced composites, with minimum fraying of the fibers on both entrance and exit from the hole is provided. The drills provided include a symmetrical cutting point with a self-centering split point and a high shear second cutting lip positioned at the outer diameter of the drill. The drills of the invention may allow for increased cutting speeds and feeds when used with such advanced composite materials, thus increasing tool productivity and providing increased performance.

The present invention demonstrates an improved CNC Control system, which integrates operator-induced changes into the pre-programmed CNC machining process. The improved CNC Control system develops a Human Activity Storage Program (HASP), which is used for subsequent production in conjunction with and simultaneously with the Numerical Control Program thereby enhancing the production process by integrating the skilled machinist's input into the production process. The numerical control program of a CNC machine is interfaced with an IBM compatible personal computer (PC) to make information relative to the block number, feed-rate and / or spindle speed over-ride values available at the personal computer. If the CNC Control has been re-configured properly (with regard to the ladder interface and operating system) a PC computer is not required. During the machining of a part the machine operator will manually over-ride the feed-rate and / or the spindle speed to optimize machining performance. Through the use of VISUAL BASIC OR C++programming modules and routines, the spindle speed and feed-rate controls (located at the CNC Control) are polled at frequent or 5OO ms intervals. The status or over-ridden values of these controls are correlated to the active block number in use during each polled sequence and this information is written to an "event file". After the subject part has been completed, one of two options can be used. An "edit phase" is initiated which utilizes the information in the "event file" to reconstruct the MCD file. After the edit phase is complete, the resultant output "Optimized MCD" can be used to produce like parts with confidence that all motion is running at peak performance and all programmed trajectories are maintained. The cycle can be repeated again (if desired) to ensure even greater efficiency while cutting. In the alternative, the event file can be employed to "command" the CNC Control with respect to feed-rate and / or spindle speed over-ride settings.

The invention relates to a radial and axial roll-forming method for a large internal-stage annular piece. The method comprises the following steps of: (1) making a blank, namely performing hot-forging, upsetting, punching and slug-stamping on a bar material, and thus obtaining an annular piece blank for rolling; (2) designing a roll hole pattern, namely determining the size of the roll hole pattern according to a roll linear speed, an equipment parameter, a roll deformation condition and the size of the annular piece blank, and determining the size of the axial roll hole pattern according to the roll linear speed, the equipment parameter, the annular piece blank and the size of the annular piece blank; and (3) roll-forming, namely putting the obtained annular piece blank on an annular rolling machine for rolling, controlling an upper conical roller and a lower conical roller to move backwards in real time during rolling to make the bottom end of the annular rolling machine always contact outer diameters of the upper end face and the lower end face of the annular piece, controlling the rolling process by rationally distributing a feeding speed and a feeding amount according to three stages, namely pre-rolling, rolling and shaping rolling, and when the outer diameter of the detected annular piece reaches a preset value, finishing the rolling process. The method has the characteristics of high production efficiency, low production cost and high product quality.

The invention belongs to the ultraprecision machining field of the hard and brittle semiconductor crystalline materials and relates to a grinding force on-line measurement device used in the grinding process of the semiconductor wafer and a force-controlling grinding method. The invention discloses a semiconductor wafer grinding force on-line measurement device which is used as the feedback element of a grinding force adaptive control system. The grinding force measurement device adopts the piezoelectric measuring principle and contains a sensor part and a data processing unit, wherein the sensor part is used for the on-line measurement of the radial force Fr, the tangential force Ft and the axial force Fz; and the data processing unit is used to collect and analyze the grinding force data and perform feedback control to the feed speed and feed amount of the grinding wheel, thus the aim of on-line measurement can be achieved. The invention has the following advantages: the grinding force on-line measurement device has simple structure, and the modifications to the original equipment are less; the grinding force on-line measurement links are fewer, the response speed is fast, and the precision is high; and the grinding efficiency of the semiconductor wafer can be increased and the thickness of the damaged layer is reduced.

The invention relates to a symmetric rolling forming method of large inner-step ring parts, mainly comprising the following steps of: (1) blanking, upsetting, punching, punching the wad, and preparing a ring part blank used for rolling, wherein the size of the ring part blank is determined by the size of the ring part, a rolling ratio, and a radial feed / axial feed ratio; (2) designing a rolling groove, wherein the rolling groove is composed of a driven roller working surface and a core roller working surface and sizes of the driven roller working surface and the core roller working surface are determined by a rolling linear speed, equipment parameters, rolling deformation conditions, the ring part blank size, and the ring part size; (3) rolling forming which comprises placing the well-prepared ring part blank on a ring rolling machine and controlling the rolling process in a way that the feed speed and the feed amount are reasonably distributed according to three stages of pre-rolling, main rolling, and shaping rolling, and ending the rolling process when an outer diameter of the tested ring part achieves a predetermined value; and (4) machining cutting which comprises placing the well-rolled ring part on a sawing machine and cutting the ring part into two required inner-step ring parts from a high portion in the middle. The symmetric rolling forming method provided by the invention has the characteristics of good production stability, high efficiency, and high product performance.

The invention discloses a drilling terminal end actuator used for industrial robots, comprising a spindle unit, a feed unit and a supporting unit. The spindle unit comprises a precise spindle head, a spindle motor and drive, an ER spring collet, a tool holder, a tool, a synchronous belt and a pulley; the feed unit comprises a linear ball bearing guide bushing and a special axis, a screw pair, a feed motor and drive, the synchronous belt and the pulley; and the supporting unit comprises a pedestal, a shaft seat, a precise spindle head support, a cylinder support, a pressure head pipe shell, a presser foot, a front plate, a rear plate, an electromagnetic valve connecting plate, a spindle motor connecting plate and a limit switch connecting plate. The spindle unit realizes the adjustable cutting speed of the drill, the feed unit realizes the adjustable feed speed and feed travel of the drill, and the supporting unit ensures the whole stiffness of the terminal end actuator. The drilling terminal end actuator can constitute a flexible drilling and cutting system by being combined with the robot for use, which can improve the drilling efficiency and accuracy, improve the drilling quality and reduce the labor duplication of workers.

The invention relates to a cold rolling forming method for an automotive hub bearing ring part with an L-shaped cross section. The cold rolling forming method for the automotive hub bearing ring part with the L-shaped cross section is characterized by comprising the following steps of (1) designing and producing a ring blank, namely confirming the ring blank shape and size according to a ring part size and a rolling rate, performing blanking, heating, upsetting, punching and punching the wed through bar materials and forming into a cold rolling ring blank; (2) designing hole types, namely confirming sizes of a driving roller and a spindle-shaped chamber according to the shape and the size of the ring part and designing working surface radial sizes of the driving roller and a spindle according to the ring blank size, cold rolling deformation conditions and device parameters; (3) performing cold rolling forming, namely arranging a machined driving roller and a machined spindle into a cold rolling ring machine, putting a machined ring blank into the cold rolling ring machine, reasonably distributing the spindle feed speed and the feed amount according to three stages such as high-speed rolling, medium speed rolling and low speed rolling to perform control and enabling the cold rolling process to be ended when the external diameter of the measured ring part achieves a preset value. The cold rolling forming method for the automotive hub bearing ring part with the L-shaped cross section has the advantages of being capable of enabling reasonable design and effective control of cold rolling forming technologies of the hub bearing ring part with the L-shaped cross section to be achieved, guaranteeing stable cold rolling forming, reducing rejection rates during cold rolling and being high in production efficiency, low in production cost and good in production quality.

The invention relates to a radial and axial rolling forming method for a large-sized double-groove ring piece. The method mainly comprises the following steps: (1), manufacturing blanks: uniformly heating the bar section to the hot forging deformation temperature, unsetting, piercing and punching the hot material section on a press to manufacture ring piece blanks, wherein the size of each ring piece blank is determined according to the ring piece size, the rolling ratio and the radial and axial feeding quantity ratio; (2), designing a rolling hole shape, wherein the rolling hole shape consists of a driving roller working surface and a core roller working surface and the size of the driving roller working surface and the core roller working surface is determined according to the rolling linear velocity, the equipment parameters, the rolling deformation condition, the size of the ring piece blank and the size of the ring piece; and (3), rolling and forming: placing the ring piece blank on a ring rolling machine and rolling, wherein the rolling process is controlled by reasonably distributing feeding speed and feeding quantity according to three stages of prerolling, primary rolling and shaping rolling and the rolling process is finished when the outer diameter of the ring piece reaches the preset value. The method has the characteristics of high production efficiency, low production cost and high product quality.

The invention discloses a laminated structure hole manufacturing online monitoring self-adaptive machining method. The laminated structure hole manufacturing online monitoring self-adaptive machining method comprises the following steps that (1), a hole manufacturing cutter installed on a numerical control machine tool is adopted to manufacture holes in laminated structures of carbon fiber reinforced composite materials and alloy materials, the distance between the laminated structure hole forming position reached by the bottom end of the hole manufacturing cutter and the material interface in the laminated structures is measured through an ultrasonic thickness measurement method, and then the distance signal is transmitted to a control system of the numerical control machine tool with the hole manufacturing cutter after being processed; (2), the control system of the numerical control machine tool compares the received distance signal with a set value 0, if the distance value is greater than 0, the control system of the numerical control machine tool still outputs an initial control signal, and if the distance value is 0, the control system of the numerical control machine tool outputs a new preset control signal to change the spindle rotation speed and feeding speed of the hole manufacturing cutter. By the adoption of the method, the laminated assembly hole manufacturing quality and hole machining efficiency can be improved, and the cost is lowered.

The present invention describes a device incorporating artificial intelligence and corresponding methods for recommending an optimal machinability data selection, especially with machine performance degradation. The device comprises of a first component, which feeds the system with necessary inputs. A second component, which is the main processing unit, acts as an inference engine to predict the outputs. The last component interprets the outputs, conveys the processed outputs to target location and converts them into necessary tasks. The inputs are identified as the machining operations, work piece material, machining tool type, and depth of cut. The input includes machine performance characteristics as well, that is the degradation level of the machine which interrelates with machine vibration and surface finishing. The outputs are the machining parameters, comprising of the optimal cutting speed and feed rate. The inference engine can be established with fuzzy logic, neural network or neural-fuzzy.

The invention discloses a variable parameter control holing method for a laminated structure of an aircraft. The laminated structure comprises a carbon fiber composite material layer and a titanium alloy layer. The method comprises the following steps: (1) pre-pressing a to-be-holed area of a workpiece; (2) controlling a tool to hole the carbon fiber composite material layer in a helical milling manner until the distance between a tool nose and a material interface is a preset value; (3) changing a rotation angle accelerated speed, a revolution angle accelerated speed and a feeding accelerated speed of the tool, and controlling the tool to continuously hole until the tool nose reaches the material interface; (4) keeping the rotation angle accelerated speed, the revolution angle accelerated speed and the feeding accelerated speed of the tool unchanged, and controlling the tool to hole the titanium alloy layer in the helical milling manner. According to the method, by dynamically adjusting parameters of the tool, requirements on cutting parameters of different material layers of the laminated structure are met, and the holing quality and the holing efficiency are ensured; the parameters of the tool are converted between 0.2mm and 0.3mm, the machining quality can be ensured, and the parameters can be switched within enough time; holing is carried out in the helical milling manner, so that the holing efficiency is improved.

The invention discloses a steel pipe cutting machine tool, which is used for cutting large / medium-caliber steel pipes, and comprises a spindle rotating mechanism, a spindle lifting mechanism, a cutting mechanism, a supporting mechanism and a chuck clamping and unclamping device. According to the steel pipe cutting machine tool, a cutting mode of simultaneously rotating a saw blade and the steel pipes along an axis is adopted, when the saw blade rotates at a high speed and feeds and cuts the steel pipes along the radial direction of the steel pipes, the steel pipes rotate around the own axis at low speed, so that the saw blade cuts the steel pipes toward the axis along the outer circumference of the steel pipe; and therefore, the steel pipes can be cut off when the inner walls of the steel pipes are cut by the saw blade. Compared with the prior art, the steel pipe cutting machine tool has the advantages that the feeding distance is greatly shortened, the cutting speed is increased, the diameter of the saw blade is not required to be large, the thickness of the saw blade is small, and the precision and finish of the cutting section are greatly improved; and meanwhile, the energy loss and material loss of the steel pipe cutting machine tool are greatly reduced, and the current industrial requirements for environment friendliness and low carbon are met.

The invention relates to an enveloping rolling forming method for a thin-wall high-rib cylindrical component. The method comprises the steps that a circular ring blank is placed in a sleeve, the outerwall of the circular ring blank is tightly attached to the inner wall of the sleeve, the outer wall of an enveloping roller is tightly attached to the inner wall of the circular ring blank, and an upper annular cover plate and a lower annular cover plate are tightly attached to the upper end surface and the lower end surface of the sleeve to restrain the axial height of the circular ring blank; the sleeve drives the circular ring blank to rotate actively around the axis of the circular ring blank at a rotating speed, the enveloping roller is driven to rotate actively around the axis of the enveloping roller at a rotating speed and feed rolls the circular ring blank at a speed v in the radial direction; under the combined action of the enveloping roller and the sleeve, the enveloping roller and the circular ring blank are subjected to enveloping movement, and the circular ring blank is subjected to continuous local plastic deformation until a high rib is completely enveloped and formedby the enveloping roller; and the enveloping roller comprises a longitudinal rib cavity, a transverse rib cavity and a clamping end, and the longitudinal rib cavity and the transverse rib cavity arerespectively used for forming a longitudinal rib and a transverse rib of the target thin-wall high-rib cylindrical component. According to the enveloping rolling forming method for the thin-wall high-rib cylindrical component, the thin-wall high-rib cylindrical component is subjected to enveloping and rolling forming, the forming component is good in performance, the process production efficiencyand the material utilization rate are high.

The invention relates to a programmable logic controller (PLC) control-based full-automatic sample cutting machine and a cutting method thereof, and belongs to the field of machining, which solves the problems of large labor consumption and difficult guarantee of precise cutting and quality of samples in the conventional cutting technology. The PLC control-based full-automatic sample cutting machine comprises a main shaft, a disc cutter, a sample clamping table, a cross-shaped sliding table, a feed mechanism, a sample introduction mechanism and a swinging mechanism, wherein the disc cutter isarranged on the main shaft; the sample clamping table is arranged on the cross-shaped sliding table; and the swing mechanism is arranged on the sample clamping table and can drive samples to swing upand down. In the PLC control-based full-automatic sample cutting machine, on the basis of PLC control, a touch screen is used as a man-machine interaction interface to perform parameter setting, so that the PLC control-based full-automatic sample cutting machine can complete actions such as feed / retracting, sample introduction / sample return, restoration, swinging and the like automatically according to preset advance parameters, and can regulate the rotational speed and feed speed and feed mode of blades automatically according to the change of blade speed or the change of main motor loads which are generated by the complexity of sample cutting.

The invention discloses a groove pipe cutting all-in-one machine, which is characterized in that a rack is provided with a spindle, a cutter feed servo motor is fixedly arranged on the rack, a cutter rotating disk is connected with the spindle, and a cutter feed shelter is concentric with the cutter rotating disk; a transmission redirection component is arranged between the cutter feed shelter and a cutter mobile device, and the cutter rotating disk is provided with 2-4 cutter mobile devices; the front and the back of the rack are respectively provided with a clamping mechanism, and 3-6 jaws are evenly distributed on grip slippers in the front and the back clamping mechanisms respectively; and a clamping jaw, a guide rail and a horizontal expansion device are arranged in a beam above the rack and a support, and the clamping jaw is internally provided with a vertical expansion device, a guide rail and a pair of clamping jaws. By using the machine provided by the invention, the relativeangular velocity difference generated between the cutter feed shelter and the cutter rotating disk can be kept constant, and the cutter feed is stable and the movable position of the cutter can be accurately controlled, thus realizing groove manufacturing in different forms; and the cutter is not easy to damage, thereby ensuring even cutting speed and feed speed, and guaranteeing the groove manufacturing of a steel tube with different wall thicknesses.

This invention relates to a method for preparing self-lubricating composite, especially self-lubricating polymer-based composite. The method comprises: drying polymer matrix, solid lubricant, reinforcing fibers and fillers, mixing the above raw materials except fibers, mixing uniformly by a high-speed mixer, adding into an extruder, granulating, adding fiber filaments from the feed hole of the extruder, and controlling the fiber content by adjusting the rotation speed and feeding frequency to obtain self-lubricating composite granules.

The invention is an electromagnetic speed regulating electric-dragged miner, including a machine body, two dragging boxes situated at two ends of the machine body, respectively, driving wheel and a cutting mechanism, where each dragging box contains an electromagnetic speed regulating motor which includes a three-phase asynchronous cage motor, an electromagnetic slip clutch and a speed-regulating control system. The clutch includes an armature, a magnetic pole, exciting winding, magnetic conductor and a speed measurer, the armature is installed on the output shaft of the three-phase asynchronous cage motor and rotates with the output shaft at the same speed, the magnetic pole is installed the output shaft of the electromagnetic speed regulating motor, the exciting winding and magnetic conductor are fixed inside the magnetic pole, and the speed measurer is installed on the output shaft of the electromagnetic speed regulating motor to measure the output speed and feeds it back to the speed regulating control system; the speed regulating control system is a speed and current double closed-loop speed regulating control system, and regulates the corresponding the exciting current magnitude according to the feedback information from the sensor and speed measurer, thus achieving the purpose of changing output speed.

A box machine is retrofitted by removing the upper feed roll, sheet feeder, and by replacing the lower feed roll with a drive shaft. A transport section and a sheet feeder are then inserted into the box machine. The transport section comprises transport wheels driven by the drive shaft which engage a sheet to transport it to the box machine without crushing. The sheet feeder comprises feed wheels driven by a servo motor for feeding the lowermost sheet of a stack to the transport section. A feed interrupter is movable from a raised stop-feed position to a lowered feed position by cams rotated by a servo motor. A controller coordinates the velocity of the feed wheels and position of the feed interrupter. Retrofitted machines eliminate the need to increase Edge Crush Test ratings of sheets from the corrugator 15% to 20% greater than printed in the certificate stamp.

The invention discloses a machining method for a worm tooth profile of a cutter shaft of a large gear shaping machine, which comprises the following steps of: 1, rough machining before carburizing and quenching; 2, semifinishing after carburizing and quenching; and 3, final finishing. In the semifinishing in the step 2, two side surfaces of the tooth profile are turned by adopting a ceramic bladethrough using a numerically controlled lathe, and the allowance of the single face of the tooth thickness is ensured to be 0.18-0.22mm; and in the finishing in the step 3, cutting speed and feeding quantity are respectively controlled to be below 48.25m / min and 5 threads / turn by adopting a numerically controlled outer diameter slotting tool bar and a numerically controlled outer diameter slottingtool blade thorough using the numerically controlled lathe. According to the invention, the machining range of the numerically controlled lathe is enlarged, the technological level and the operational capacity are improved, the cost is reduced, and the production cycle is shortened.

The invention discloses a feeding robot based on an indoor electronic map, and a precise positioning method for the feeding robot. The feeding robot consists of an upper control computer, an Xbee wireless receiving and transmitting device and a feeding robot controller. A feeding management system and the indoor electronic map matched with the actual geometric dimension of an animal house are built in the upper control computer. The electronic map takes charge of the traveling path, traveling speed and feeding order of the feeding robot, and transmits the above information to the corresponding feeding robot controller through the Xbee wireless receiving and transmitting device. After the feeding robot controller receives the information, the feeding robot controller controls the feeding robot to operate according to the specified feeding amount, traveling path and speed, and feeds back various types of real-time data to the upper control computer timely in an operation process, and achieves the updating of the data in a database. The feeding robot achieves the unmanned operation and path planning, and achieves the precise positioning in an operation process.

The invention discloses a feeding device of a double-wheel slot milling machine and the double-wheel slot milling machine. The feeding device comprises an oil cylinder, wherein a cylinder barrel of the oil cylinder is hinged to a mast or a gooseneck boom of the double-wheel slot milling machine; a piston rod of the oil cylinder is connected with a milling device arranged below the oil cylinder; the oil cylinder can achieve differential motion together with a winding drum motor through a pulley device. According to the feeding device and the double-wheel slot milling machine, the oil cylinder does not need to be specially protected, the feeding speed and the feeding pressure of the milling device can be better controlled, the stroke replacement efficiency is improved, the structure is simple, the cost is lower, and the repair operation is convenient.

A method for manufacturing a mechanical seal used in fluid applications, wherein the mechanical seal is comprised of a sintered (cemented) tungsten carbide ring that is turned on a lathe at a negative top rake angle instead of formed by grinding. The cemented tungsten carbide ring is initially prepared by rounding corners of the top surface to form a radii. The resulting mechanical seal yields significantly less surface damage, can be formed using faster cutting speeds and feeds than when grinding, enables formation of a greater range of complex geometries for the mechanical seals, and requires fewer passes than grinding. The compact is also formed at a significantly reduced cost as compared to grinding.

The present invention relates to methods and systems for automatically feeding a feeding housing (206) of a drilling device (200). The drilling device (200) includes a drill stand (202), a drilling machine (204) and a feeding housing (206). Further, the drilling machine (204), which is suspended by the feeding housing (206), includes a drill with a drilling motor for performing a drilling operation through a drilling object. The feeding unit (208) includes an electric feeding motor for feeding the feeding housing (206) along the stand (202). Further, the feeding unit (208) also includes a controller for manually influencing the feeding motor's direction of rotation, speed and feeding force.

The invention discloses a real-time trimming method of a feeding speed, and the method comprises a numerical control system, a switch device and a speed measuring device, wherein the numerical control system is respectively connected with the switch device and the speed measuring device, the method comprises the steps of: setting a new trimming value of the feeding speed of the current point, detecting the acceleration / deceleration / constant speed state of the feeding speed of the current point through the speed measuring device, comparing the new trimming value with the last trimming value, and planning the speed values of the parts behind the current point according to the detecting and comparing results in a preset method; and the method disclosed by the invention has the beneficial effects of providing a real-time trimming method of a feeding speed suitable for high speed processing to solve the problem of discontinuous feeding speed and feeding acceleration of a machine tool during the trimming process so as to trim the feeding speed in real time with a continuous acceleration during the actual processing duration.

The present invention provides an inner high-pressure formation process with low pressure source. One pressurizing piston with small diameter is acted by one low pressure source to enter one totally enclosed metal blank cavity filled with liquid to produce inner high pressure inside liquid to deform the metal blank. By means of the restriction of outer mold to wrap the metal blank, required shape and sizes are reached. The low pressure source and the inner liquid pressure are controlled via controlling the diameter, feeding rate and feeding distance of the pressurizing piston. The present invention has the features of low production cost, simple equipment and no medium purifying step.

The invention discloses a circular tube cutting-off device which comprises a trolley, a sliding base, a gear ring and a connecting rod mechanism. The lower portion of the trolley is matched with two guiding rails through idler wheels, wherein the guiding rails are arranged in parallel. The upper portion of the trolley is symmetrically provided with two stand columns. The trolley is further provided with a top wheel device, the height of the top wheel device can be adjusted, and the sliding base is installed on the stand columns in a height-adjustable mode. A circular hole where a circular tube penetrates is formed in the sliding base. The gear ring can be installed on the sliding base in a rotating mode and is concentric with the circular hole in the sliding base. The connecting rod mechanism is symmetrically installed on the gear ring. A cutting gun for cutting the circular tube is installed at the end of the connecting rod mechanism, and corresponds to the circular tube. The top wheel device abuts against the circular tube. The position of the sliding base on the stand columns is adjusted so as to enable the axis of the circular tube to penetrate through the circular hole and the circle center of the gear ring. According to the circular tube cutting-off device, the gear ring is adopted and can rotate, so that the cutting gun can be driven by the connecting rod mechanism to rotate; the cutting speed and feeding amount of the cutting gun can be determined according to actual requirements, so that the cutting speed and quality of the circular tube are improved.

Disclosed is a rolling mill comprising a roll stand with working rolls, a roll train located at the feeding end of the roll stand, and a control device. The working rolls form a roll gap. The control device triggers the roll stand such that the working rolls rotate at a certain peripheral speed while triggering the roll train located at the feeding end of the roll stand in such a way that the leading edge of the strip-shaped rolling stock reaches the roll gap at a feeding speed that is greater than the peripheral speed. The control device adjusts the peripheral speed and the feeding speed to each other in such a way that a potential angled position of the leading edge relative to the roll gap is at least reduced as a result of said adjustment.

The process involves cutting a roughly machined groove (44) in a workpiece i.e. rotary shaft (10), by moving a molded roughing rotary cutting tool in a direction perpendicular to an axis relative to the workpiece by rotating the molded roughing rotary cutting tool around an axis. The groove is smoothed in the workpiece by moving the cutting tool in a direction perpendicular to the axis relative to the workpiece by rotation of the molded smoothing rotary cutting tool around the axis. A base section (43) of the roughly machined groove is unsmoothed by the molded smoothing rotary cutting tool. Independent claims are also included for the following: (1) a kit of molded rotary cutting tools for cutting a groove of a pre-determined shaped in a workpiece (2) a molded roughing rotary cutting tool, comprising a trailing edge.

The invention discloses a self-adaptation control device of a grain harvesting machine header. A header body is connected with a vehicle body axle of a harvesting machine; one end of a reel bracket isconnected with the header body, and a reel is installed at the other end of the reel bracket; spring tooth shafts are installed on the reel, and spring teeth are installed on the spring tooth shafts;a cutter pendulum ring box is installed below the reel; shaft heads at the two ends of an auger are fixed to the two side walls of the header body through bearings; a cutter is installed on a pendulum rod of the cutter pendulum ring box; by utilizing an information collection device, the work state of the harvesting machine is acquired, and adjustment is conducted. The invention discloses the self-adaptation control device and method of the grain harvesting machine header. For matching of the operation state of the harvesting machine header and the operation speed and feeding quantity of theharvesting machine header, the problems are solved that in order to adapt to different operation conditions, an operator needs to adjust the operation state of the harvesting machine header frequently, and otherwise the harvesting machine cannot work stably; the work efficiency is greatly improved, and the failure rate of the harvesting machine is reduced.