15 results about "Speeds and feeds" patented technology

This invention provides a precision control method and system for the linkage of machine tool spindle and feed axis for improving the surface quality of parts. The method includes acquiring preset machining requirements for the workpiece; determining the current state of the workpiece based on these preset machining requirements and under specific conditions where machine tool parameters meet these requirements. The current state of the workpiece includes at least one of the following: the physical properties of the workpiece, the current machining form of the workpiece, and the target machining form of the workpiece at the next moment. This invention determines the current state of the workpiece and obtains the changes in workpiece surface morphology and cutting efficiency under the same conditions after different adjustment methods for the spindle speed and feed rate in the machine tool power unit. Based on these changes in workpiece surface morphology and cutting efficiency, it determines which shifting method to use for control adjustment, selecting an adjustment method suitable for the current working conditions, ensuring minimal changes in workpiece surface morphology during adjustment, and guaranteeing workpiece machining efficiency.

The utility model discloses a kind of round nose coating knives of two-way chip removal passage, including supporting seat, milling rod, driving mechanism and reset mechanism, milling rod is slidably connected on supporting seat, and with supporting seat rotationally connected, and it is provided with round nose cutter bar on one end of milling rod located supporting seat outside, driving mechanism and reset mechanism are all arranged in supporting seat.The beneficial effects of the utility model are: in the utility model, by integrating driving mechanism and reset mechanism in supporting seat, the tool is simultaneously realized high-speed rotation and axial small-range reciprocating motion in the processing process, without relying on external cylinder or workpiece rotation, burr elimination and surface finishing can be completed, and by the combination of different number of teeth first driving gear, first driven gear, and second driving gear and second driven gear, the synergic control of cutting speed and feed rate is optimized, to ensure that the cutting depth of the tool is stable in the linkage process, reduce the vibration and tool wear caused by motion superposition.

The invention discloses a tilting-pad thrust bearing pad machining method and system. The method comprises the steps that pad basic structure parameters, material physical attribute parameters and preset machining precision indexes are obtained firstly; constructing a tile force thermal coupling deformation simulation model, and inputting parameters to simulate stress distribution and deformation of the tile in cutting; a surface microtopography oil film adaptation model is constructed based on the deformation data, and the mapping relation between the surface microcosmic parameters and the oil film performance is determined; then multi-source sensing equipment is deployed to collect cutting force, temperature and vibration signals, and comprehensive characteristic parameters are obtained through processing of a multi-source sensing cutting force fusion algorithm; the adaptive relation parameters and the comprehensive characteristic parameters are input into a machining parameter decision support platform, and parameters such as the cutting speed and the feeding amount are dynamically optimized; and finally, processing according to the optimized parameters and feeding back data correction parameters in real time. The system comprises six units. According to the method and system, multi-model collaboration and parameter real-time optimization are achieved, and the pad machining precision and the bearing reliability are improved.

Numerical control device (1) for controlling a machine tool (100), wherein the machine tool (100) comprises a spindle (Ac) for rotating a cutting tool (T) or a workpiece (W) which is a machining target, and a feed axis (Az) for moving the cutting tool (T) relative to the workpiece (W), and for causing the spindle (Ac) and the feed axis (Az) to interact to cut the workpiece (W) by means of the cutting tool (T), wherein the numerical control device (1) comprises: a reference speed calculation unit (14) configured to calculate a spindle speed, which is a speed of the spindle (Ac) according to a machine machining program, and a feed rate, which is a speed of movement of the feed axis (Az) according to the machine machining program;a vibration command calculation unit (15) configured to calculate a vibration command, which is a periodic variation component superimposed on a feed axis (Az) command, based on the spindle speed and feed rate, and a predefined vibration frequency amplification; a setting detection unit (13) configured to detect an upper limit for the frequency of the vibration command; and an adjustment unit (16) configured to adjust the frequency of the vibration command, or at least either the spindle speed or the vibration frequency amplification, so that the frequency of the vibration command does not exceed the upper limit.

The invention provides a control system and method for PCB numerical control drilling, and the method comprises the steps: determining the feeding section speed of a numerical control machine tool through the rotating speed of a main shaft of the numerical control machine tool and the feeding amount per revolution, and determining the safety switching height of the surface drilling speed switching of a target PCB according to the inertia braking distance and the safety margin of the high-speed section speed of the numerical control machine tool; after the Z-axis driving mechanism is controlled to descend to the safe switching height at the high-speed section speed, the Z-axis driving mechanism is switched to the feeding section speed to complete drilling feeding, and the drilling return speed coefficient of the Z-axis driving mechanism is determined based on the drilling depth information of the Z-axis driving mechanism and the plate parameters; determining a rollback section speed of lifting to the safe height according to the rollback speed coefficient, the high-speed section speed and the feeding section speed; and after the drilled hole reaches the preset hole position depth of the target PCB, the Z-axis driving mechanism is controlled to lift the main shaft to the safe height at the speed of the rollback section. Based on the scheme, safe switching of the three-stage speeds of the main shaft and the Z shaft in PCB numerical control drilling can be achieved.

The application relates to an intelligent regulation method for a machine tool machining cloud platform motor base in the field of new-generation information technology, and the method comprises the following steps: if the classification result shows that the tool wear degree exceeds a preset safety threshold, fusing machine tool historical operation data to adjust machining parameters such as cutting speed and feed rate, and obtaining an optimized parameter set; for the optimized parameter set, acquiring machine tool current state data and inputting a prediction model to predict potential machining deviation and judge the prediction deviation value; if the prediction deviation value exceeds the allowed machining precision range, dynamically adjusting the tool movement path according to the judgment result and fusing real-time detection data to determine the adjusted path; extracting the geometric features of the machining track from the adjusted path, comparing the geometric features with machine tool real-time monitoring data, and obtaining a consistency evaluation score; according to the consistency evaluation score, using a detection algorithm to verify the size stability of the product, and judging the final quality qualified state.

The application designs a material taking head control method, an unloading machine and electronic equipment. The material taking head control method comprises the following steps: determining a transverse movement speed and a feed amount of the material taking head based on an expected full load rate of the material taking head; and controlling the material taking head to take material according to the transverse movement speed and the feed amount, wherein the expected full load rate is a ratio of a material amount taken by the material taking head at the transverse movement speed and the feed amount to a full load material amount of the material taking head. In the embodiment of the application, the material taking head takes material at different transverse cutting speeds and feed amounts under different material surface states, thereby solving the problem of low material taking efficiency when the material taking head takes material at a fixed feed amount in the prior art.

The invention discloses pile foundation drilling equipment and method, and relates to the technical field of drilling equipment.The pile foundation drilling equipment comprises a moving part, a drilling part and a control unit, the drilling part comprises a vertical frame and a drilling mechanism, the vertical frame comprises a first frame body and a second frame body, the first frame body is installed on a connecting frame, and the second frame body is installed on the connecting frame; the second power device drives the second frame body to linearly slide; the drilling mechanism is fixedly connected with the second frame body; the control unit is used for obtaining the real-time feeding resistance and the real-time rotating torque so as to judge the stratum state, and the drilling speed and the feeding speed of the drilling mechanism are calculated based on the stratum state judgment result so as to control the drilling mechanism to output the corresponding drilling speed and control the second power device to drive the drilling part to move at the corresponding feeding speed. The method can automatically adapt to stratum state changes, the problem of low efficiency caused by manual adjustment lag is reduced, and the risks of in-hole accidents such as drill jamming and drill burying are reduced.

The present application belongs to the technical field of particle swarm optimization control, and particularly relates to an intelligent production line control method for an automobile differential shell, which comprises the following steps: acquiring the cutting resistance, spindle speed, feed speed and measured cutting temperature of each machining section at the spindle during the cutting process of the differential shell; determining the pulsation significance according to the distribution of the cutting resistance in the reference sequence for any sampling point; calculating the thermal field energy dispersion according to the temperature change of the machining section; fusing the pulsation significance and the thermal field energy dispersion to obtain a mismatch factor, and combining a preset inertia weight to obtain an adaptive inertia weight, which is input into a particle swarm optimization algorithm to output the optimal spindle speed and feed speed combination. The present application enables the optimization algorithm to perceive the thermal coupling fluctuation and physical instability state in real time, realizes adaptive jump optimization of the production line parameters, and improves the machining size precision and surface quality of the differential shell.

The invention relates to the field of milling machining, and discloses a thermal field auxiliary machining milling cutter cooling device which comprises a milling cutter and a guide piece movably connected with the milling cutter. A channel is formed in the inner wall of the milling cutter, a containing cavity is formed in the inner wall of the guiding piece, when the milling cutter is connected with the guiding piece, the channel is communicated with the containing cavity, and the guiding piece is used for being connected with a low-temperature gas tank body through a conveying pipe; during working, low-temperature carbon dioxide gas enters the containing cavity through the conveying pipe and then enters the channel of the inner wall of the milling cutter, so that the inner wall of the milling cutter extends to the whole cutter to be cooled; the low-temperature carbon dioxide gas remarkably reduces the temperature of the milling cutter from the inside, the main heat mechanism causing failure of the cutter is fundamentally restrained, and higher cutting speed and feed rate are allowed to be used without worrying about rapid failure of the cutter due to overheating. The metal removal rate is remarkably increased, the machining time is shortened, and the production efficiency is improved.

This application relates to the field of mold ejector pin processing technology, and particularly to a method for ultrasonic-assisted rolling surface grain refinement of mold ejector pins. The method includes: obtaining the ultrasonic frequency and static pressure of the mold ejector pin; wherein the static pressure includes a first directional force and a second directional force; determining the radial resultant force of the mold ejector pin based on the first directional force and the second directional force; obtaining the amplitude matching frequency of the mold ejector pin based on the radial resultant force and the ultrasonic frequency; determining the feed rotation speed and feed rate of the mold ejector pin according to the amplitude matching frequency; and determining the grain refinement parameters of the mold ejector pin based on the feed rotation speed, feed rate, amplitude matching frequency, ultrasonic frequency, and static pressure. This method solves the problem that slender ejector pins are prone to unilateral radial loads, leading to bending deformation and uneven force distribution in the material field.

This invention discloses a method for sequential short-arc turning of splined shafts, relating to the field of splined shaft machining technology. The invention connects the splined shaft workpiece to the positive terminal of a first power supply and a block electrode to the negative terminal of the same power supply. The splined shaft workpiece is kept rotating at high speed and fed towards the block electrode, completing short-arc turning of the stepped shaft. Then, the workpiece is connected to the positive terminal of a second power supply and a hollow tubular electrode to the negative terminal. The hollow tubular electrode is kept rotating at high speed and fed towards the splined shaft workpiece, completing short-arc milling of the splined shaft. This invention achieves short-arc turning and milling on the same machine tool by changing the power supply and machining electrode. It proposes first using a block electrode for short-arc turning, then replacing it with a hollow tubular electrode for short-arc milling. By combining short-arc turning and milling, efficient and high-quality machining of splined shafts can be achieved.

The utility model relates to the field of milling cutters, in particular to a stepped milling cutter for numerical control machining of high-temperature alloy, which comprises a mounting shaft, a lengthened shaft and a blade. A lengthening shaft is arranged above the mounting shaft; a plurality of groups of blades for cutting high-temperature alloy are linearly sleeved outside the lengthening shaft and the mounting shaft; according to specific material characteristics and machining requirements, the mounting shaft and the lengthened shaft are assembled firstly, meanwhile, the blade is arranged outside the mounting shaft and the lengthened shaft in a sleeving mode, and after the rear distance is adjusted, the blade can be fixed for use; parameters such as the cutting thickness and the feeding amount of each cutter tooth can be flexibly set according to material characteristics and specific machining requirements of high-temperature alloy, so that the cutter can keep an optimal cutting state in the cutting process, the cutting performance of the cutter is fully exerted, the cutting speed and the feeding speed are improved, the machining time is shortened, and the machining efficiency is improved.