65results about How to "Prevent overcut" patented technology

The invention discloses a continuous locus intersegment connecting speed processing method for a numerical control system, which comprises the following steps of: determining an adjacent two-segment locus connecting model, and acquiring the movement parameter of the adjacent two-segment locus to be processed; calculating the path length of the adjacent two-segment locus to be processed; calculating the speed of a connecting point of the adjacent two-segment locus under the conditions of acceleration, arch height error, instruction feeding speed and corner constraint; calculating the speed of the connecting point of the adjacent two-segment locus satisfying the condition S curve acceleration and deceleration control-based path length constraint of the front segment locus in the adjacent two-segment locus; and calculating the speed of the connecting point of the adjacent two-segment locus satisfying the condition S curve acceleration and deceleration control-based path length constraint of the rear segment locus in the adjacent two-segment locus, wherein the calculated speed is used as a final value of the adjacent two-segment locus connecting speed. The invention provides the continuous locus intersegment connecting speed processing method for numerical control equipment, so that the processing locus of the numerical control equipment is continuous and the speed is smooth.

The invention provides a low-frequency load reduction system and method. The system comprises a data acquiring module, a data preprocessing module, a low-frequency load reduction quantity calculating module and a low-frequency load reduction performing module which are sequentially connected, wherein the data acquiring module is used for acquiring the system data; the data preprocessing module is used for preprocessing the data acquired by the data acquiring module; the low-frequency load reduction quantity calculation module is used for calculating the total load reduction quantity of the system and the load reduction quantity of each load bus of the system; the low-frequency load reduction performing module is used for determining the tangential load bus and the corresponding tangential load quantity. With the adoption of the system and the method, the system frequency can be quickly returned to be stable, and meanwhile, the system voltage stability can be greatly improved.

The invention discloses a woodcarving refine method based on image processing and force feedback; the method comprises the following steps: obtaining a woodcarving image after rough polishing; comparing the woodcarving image with a standard image so as to obtain burr positions on the woodcarving, and the standard image refers to a standard woodcarving image after refine process; controlling a rotary grinding head to carry out refine polishing on the burr positions with a preset constant pressure according to the woodcarving standard image of the burr positions, wherein the standard image refers to a layout of the standard woodcarving after refine treatment. The invention also discloses a woodcarving refine device based on image processing and force feedback, thus realizing high precision and high efficiency woodcarving refine by a machine.

The invention discloses a method for smoothing a machining route of a five-axle machining cutter. The method comprises the steps of obtaining a discrete attitude vector and a position vector of a five-axle machining cutter on a unit spherical surface; obtaining a transformation quaternion according to the discrete attitude vector; carrying out parameter interpolation optimization of the transformation quaternion in the quaternion space by the least square method so as to obtain optimized unit quaternion; obtaining the optimized discrete attitude vector that is located on the unit spherical surface according to the optimized unit quaternion; carrying out the interpolation optimization of the position vector by adopting the least square method; obtaining the smooth machining route by the interpolation-optimized position vector and the optimized discrete attitude vector; and inputting the smooth machining route into a five-axle numerically-controlled machine tool so as to realize the machining of workpieces. According to The method disclosed by the invention, the interpolation of the discrete attitude points on the unit spherical surface can be conducted to form a continuous smooth trace, and the cutting is conducted practically by the smooth trace to enhance machining precision.

The invention discloses a cutting tool assembly of debarkers. The cutting tool assembly comprises a cutting wheel and two limit discs, wherein the cutting wheel is in the shape of a cylinder, a limit disc is respectively arranged on the left and right side of the cutting wheel and the diameter of the limit disc is larger than that of the cutting wheel. A plurality of cutter blade mountings are arranged on the outer periphery of the cutting wheel, each cutter blade mounting is provided with an upper cutter blade in the shape of a strip and a lower cutter blade, the upper cutter blade and the lower cutter blade are arranged obliquely, the biggest distances of the blades of upper cutter blade and the lower cutter blade to the axis of the limit discs are both lager than the radius of the limit disc, and the upper cutter blade and the lower cutter blade are staggered. The cutting tool assembly can control the cutting depth through limit discs and therefore, over-cutting can be avoided. The oblique arrangement of the blades of the upper cutter blade and the lower cutter blade enables the cutting tools to receive a rational counter-cutting force, thereby prolonging the service life of the cutting tools and the interlaced arrangement of the upper cutter blade and the lower cutter blade improves the cutting efficiency and shortens the processing time.

The invention discloses a CNC (Computer Numerical Control) high-speed drilling and tapping system. The CNC high-speed drilling and tapping system comprises the steps of rough machining and finish machining. The CNC high-speed drilling and tapping system is characterized in that displacement induction is performed on the machining during the rough machining, and real-time position feedback is performed on a cutter during finish machining. According to the CNC high-speed drilling and tapping system, the displacement is fed back in real time, and the rough machining is tracked in real time, so that the problem of more machining residues is avoided; additionally, the position of the cutter is monitored in real time, the track of the cutter used for the finish machining is monitored, sharp point control is performed on a complex 3D molding surface, the machining step pitch of the path of the CNC finish machining cutter is respectively calculated according to the sharp point height, and whenthe position of the machining cutter is far, the displacement of the cutter is compensated; and automatic overcut preventing treatment is set, so that the phenomena of overcut and damage to the cutter due to sudden increase of cutting load of the cutter are avoided, the cutting process of the cutter can be protected, and the safe operation of high-speed machining is realized.

The invention discloses a bearing seat superfinishing drilling device with correcting and deviation preventing functions, which comprises a base, a clamping device, a deviation correcting device, an adjusting device and a mounting seat, the base is connected with the clamping device, the clamping device is in transmission connection with the deviation correcting device, the deviation correcting device is in transmission contact with the adjusting device, the deviation correcting device is connected with the base, and the mounting seat is connected with the base. A support is arranged between the base and the mounting seat, the mounting seat is located on the upper side of the base, the adjusting device is connected with the mounting seat, a forming cavity is formed in the base, the clamping device comprises a floating plate, the floating plate is movably connected with the forming cavity, two clamping seats are arranged on the upper side of the floating plate and located on the two sides of a bearing seat, and the clamping seats are connected with the bearing seat in a clamped mode. The drilling deviation direction is reset through the deviation correcting device, the drilling precision is improved, power adjustment is conducted through the adjusting device, the drilling quality is improved, ear pieces of the to-be-machined parts on the two sides of the bearing seat are sequentially clamped through the clamping seat, and therefore the bearing seat is limited.

The present invention discloses an inter-harmonics control method in a wind power collection station. The method comprises that an inter-harmonic signal extraction module carries out spectral analysis on a tie line current from the wind power collection station to a main network, calculates frequency fc of a harmonic component with the maximum amplitude, and extracts inter-harmonic signals in a tie line voltage and each wind power farm current; a wind power farm that is allowed to be cut in the collection station is determined according to the tie line inter-harmonic current, the inter-harmonic voltage, and the wind power farm inter-harmonic current; absolute values of difference values between the fc and a set of characteristic frequencies are calculated, and a minimum value dfmin among the absolute values is solved; and a sub-round and level-to-level cutting module cuts each wind power farm that is allowed to be cut in a series of rounds and level by level according to the tie line inter-harmonic current, the dfmin, and the wind power farm inter-harmonic current. According to the method disclosed by the present invention, the tie line between the wind power collection station and the main network, and each wind power farm can be monitored simultaneously, the relatively large inter-harmonic current existing in the power grid can be online monitored in real time, and whether there is an inter-harmonic generation source in the wind power collection station can be online determined in real time.

The invention provides an AC corner optimization method for five-axis 3D printing line cutting path planning. The AC corner optimization method comprises the following steps that 1, the forming direction is selected according to the characteristics of a printing model; 2, all curved surface layers where the printing paths are located are recognized, the printing path on one curved surface layer is located on one curved surface, and each curved surface layer refers to an optimization unit of the AC corner; and 3, an AC corner optimization objective function and constraint conditions are constructed, all path lines of all optimization units are sequentially optimized according to the printing sequence, and the optimal AC corner distribution on 3D printing line cutting paths of all the curved surface layers is obtained. According to the method, the normal vector of the nozzle axis and the machining surface is within the maximum deviation tolerance range delta; the AC corner of the adjacent point is within the deviation tolerance range phi; the nozzle does not need to be lifted in the printing process, continuous printing can be conducted till workpiece printing is finished, and the printing efficiency is improved; and overcutting of the workpiece is avoided, the workpiece can be protected against damage, and the printing quality of finished workpiece products is improved.

The invention discloses an electric remover for fractured pipe joints, which comprises a supporting seat, tension devices, a cutting device, a feed regulation device, a driving device and a tail stand, wherein the tree groups of tension devices fix the supporting seat on a pipe connector in an inner-bracing tensioning manner; radial feed regulation and circumferential rotation regulation of saw blades in the cutting device are realized through the feed regulation device; the driving device drives the saw blades to perform reciprocating motion so as to cut a fractured pipe joint. According to the electric remover for the fractured pipe joints, the manner of cutting before removing is adopted, so that the damage to the inner thread of an original pipe joint is extremely low, and damage caused by repair is avoided; moreover, the motor is adopted for driving the saw blades to perform reciprocating cutting, which saves both time and labor and realizes rapid removing and repairing of the fractured pipe joint; besides, the feed regulation device can realize feed control and regulation of the saw blades, to further determine the cutting position and depth and avoid over cutting, therefore the electric remover for the fractured pipe joints has the characteristics of being compact in structure, simple and rapid in operation and control, and capable of easily removing the fracture pipe connector and the like.

The invention discloses a depth adjustable rescue cutter, which comprises a cutter bottom plate (1) and a saw blade (2), wherein the saw blade (2) is arranged on the output shaft of a motor; the motor is fixed with the cutter bottom plate (1); a back plate (6) is vertically fixed below the cutter bottom plate (1) and is in parallel with the plane of the cutter blade (2); a group of depth feeding control mechanisms are arranged on the outer sides of the back plate (6) respectively through bolts; and each depth feeding control mechanism comprises a flexible seat (3), a support arm (4), a flexible arm (5), a central shaft (8), an adjustable rod (9), an axle (10) and a bearing (11). The rescue cutter uses two groups of depth feeding control mechanisms to realize depth-control cutting and four groups of rolling wheels to realize profiling cutting, so that the rescue cutter is suitable to be used as a rescue cutting device in the situations of car accident, mudslide, earthquake burying and the like.

The invention provides a cold cutting die for a titanium alloy precision-forged blade, which can effectively control the deformation for the side cut of the titanium alloy blade, improve the production efficiency and lower the production cost. The cold cutting die comprises an upper die plate and a lower die plate, as well as a punch and a lower die, wherein the upper die plate and the lower die plate are connected by a guide pillar and a ball guide sleeve in a matching manner, the punch is arranged on the lower die plate by a punch base plate, the cold cutting die is characterized in that the lower die comprises a female die and a support die, the female die is fixedly arranged on the lower die plate by a screw, the female die is internally provided with a vertical through slot and a horizontal through slot which are perpendicularly communicated, the support die is arranged in the vertical through slot, the lower end of the support die is supported by a rubber mat, the rubber mat is arranged on the lower die plate and positioned in the horizontal through slot, and the support die is 3-5mm higher than the female die under non-working state.

The invention discloses a multi-source coordination control method and system for an integrated energy system, and belongs to the technical field of intelligent power grids. The method comprises the following steps: determining that an operation state is in a power imbalance state; determining the current output and the output margin of an energy storage unit in the integrated energy system, wherein the current output and the output margin cannot adjust the power to a balance state; obtaining forward and reverse deviations allowed by the power vacancy; determining a switchable load of the integrated energy system or a power range of a power supply; and completing multi-source coordination control of the integrated energy system according to the power range of the switchable load or the power supply. According to the invention, the problems of certain over-switching, insufficient flexibility and the like of the existing load shedding method are solved, the over-switching amount of the system can be effectively reduced, the economy of load control is improved, and the influence of frequent switching of the load or the power supply on the stability of the system is avoided.

The invention relates to a power tool which comprises a power tool body. The power tool body comprises a housing, a motor, an working head, a power supply, a detecting unit and a control unit. The motor is accommodated in the housing. The working head is driven by the motor and a power is output from the motor. The power supply supplies power to the motor. The detecting unit is used for determining whether the power tool body arrives at a preset position of a workpiece. The control unit is connected with the detecting unit and the motor. On the condition that the detecting unit detects a fact that the power tool body reaches the preset position of the workpiece, the motor is stopped so that the working head correspondingly stops power outputting to a position with the anticipated cutting length on the workpiece. Therefore, an operator does not require paying attention to the accurate position of a saw blade, thereby preventing excessive cutting. Furthermore automatic stopping is realized, thereby reducing operation difficulty of the user and realizing high convenience in use. Furthermore, compared with a mechanical backstop mode, the power tool has advantages of no requirement for individual arrangement of a blocking fitting, simple structure and low manufacture cost. The invention further provides a control method for the power tool.

The invention discloses a multi-level wheel-stage interlocking island protection method applicable to a large-scale new energy power station. The multi-level wheel-stage interlocking island protection method comprises the following steps: (1) determining the constant value of island protection characteristic quantity according to the stability domain degree of the large-scale new energy power station system, and stably dividing the system into a plurality of levels; (2) generating corresponding logic expression according to the type of each interval equipment of the large-scale new energy power station and exit matrix configuration; (3) generating wheel-stage interlocking logic; and (4) identifying stable levels of the system after an island phenomenon occurs by calculating a characteristic variable value in real time, and acting on an exit matrix according to a wheel-stage interlocking logic distinguishing result so as to guarantee the rapidity and reliability of exit tripping. The method is applied to a wheel-stage interlocking logic method, the problem of overcutting appearing in the island protection process of the large-scale new energy power station is prevented, the method has higher automation level, the operation process can be simplified, the operation and maintenance costs are reduced, the reliability of operation is improved, and the method has extensive applicability at the same time.