The invention relates to a method for predicting cutting force of non-cylindrical gear slotting machining. The method comprises the following steps of: calculating the contact area when the non-cylindrical gear and the slotting cutter are processed, and uniformly distributing enough data points in the contact area; and solving the coordinate transformation matrix according to the position relationof the non-cylindrical gear and the slotting cutter to be processed; transforming the points on the isometric curve family into points in the slotting cutter coordinate system through the coordinatetransformation matrix; in each cutting step of the slotting cutter, discriminating the coordinate transformation points to select the points of the workpiece in the slotting cutter; distributing a sufficient number of data points on the tooth top circle and the left and the right involute of the slotting cutter; in each cutting step, distinguishing the contact points between the shaping cutter andthe workpiece, and screening out the contact points between the slotting cutter and the workpiece; and obtaining the size of the cutting force based on the formula of the unit cutting force. The method can accurately predict the cutting force of the non-cylindrical gear slotting machining, and has the advantages of high calculation accuracy, high calculation efficiency and the like.

Method for predicting cutting force of non-cylindrical gear slotting machining

The invention relates to a numerical control cam milling machine milling speed optimizing control method. By means of the method, the control parameter of a numerical control cam milling machine for keeping constant milling removing rate is generated, the milling load of the cam milling machine is controlled to be constant, and the method belongs to the technical field of camshaft machining. The method is characterized in that three-dimensional mapping software with a size driving function is adopted to simulate the cam milling process, the milling size of the cam rotating unit angle is calculated to further calculate the milling removing rate distribution, and the rotating speed of the numerical control cam milling C shaft is compensated by the milling removing rate distribution to enable the milling removing rate to be constant or approach constant. The method solves the problem of severe milling load unevenness caused by the constant angular speed milling commonly used by the numerical control cam milling, the peak milling removing rate at the position higher than the base circle is adjusted to be identical with that of the base circle, the milling removing rate at the position lower than the base circle is adjusted to be identical with or slightly lower than that of the base circle, so that the cam milling machine can conduct milling evenly, hardware of the numerical control cam milling machine is not required to be changed, and the machining efficiency of the cam milling machine can be greatly improved. The control parameter is only required to be made once for one product and can be used permanently when imported into the numerical control program.

Numerical control cam milling machine milling speed optimizing control method

A method for computing cut areas of a gear shaper includes the steps of firstly, drawing an original blank workpiece graph with a first color and subjecting the number of original points and a value of an actual area represented by every point of the first color to statistics; secondly, drawing tool graphs in every condition in a gear shaping process with a second color, covering the workpiece graph in the first color with tool drawings in the second color continuously, making statistics on the number of the left points of the first color of the workpiece graph in every covering condition; thirdly, subtracting the number of the left points in the first color of the workpiece graph from the number of the original points in the first color of the workpiece graph, and multiplying a result obtained from the subtraction by the value of the actual area represented by every point so as to obtain a value of the actual cut area for every stroke in the gear shaping process. The method for computing the cut areas of the gear shaper is capable of computing the actual cut area for every stroke in the gear shaping process quickly, applicable to evaluation and optimization of technical parameters of a gear shaping machine tool, high in computation precision, direct and easy to understand and convenient to use.

Method for computing cut areas of gear shaper

The invention discloses a fast predicating method of the each-tooth cutting area of circular corner milling. The fast predicating method comprises the following steps: a, establishing a rectangular coordinate system by taking the circle center at the circular bead of the design contour line of a to-be-processed component as the origin of coordinates; b, establishing the S1 equation of the design contour line of the to-be-processed component, the S2 equation of the workblank contour line of the to-be-processed component, and the S0 equation of the axis movement contour line of a milling cutter;c, at moment t, solving the coordinate pi0 of the milling cutter circle center point in the coordinate system; d, solving the intersection point pi1 of the outer contour circle of the milling cutterand the design contour line of the to-be-processed component; e, solving the intersection point pi2 of the outer contour circle of the milling cutter and the workblank contour line of the to-be-processed component; f, solving the included angle formed by the connecting line of pi0 and pi2 and the connecting line of pi0 and pi1; and g, according to the known milling cutter radius r, the each-toothfeeding ft of the milling cutter and the included angle phit obtained in the step f, solving the each-tooth cutting area At of the milling cutter at the moment t. According to the fast predicating method, the limitation of the each-tooth cutting area solving method to circular bead processing during the milling machining process in the prior art is overcome to realize fast predication of each-tooth cutting area of circular corner milling.

Fast predicating method of each-tooth cutting area of circular corner milling

The invention relates to a gear shaping method based on the equal cutting area, which is characterized in that gear shaping of a gear aims to realize shaping with equal cutting force by means of gear shaping with equal cutting area. The gear shaping method has the advantages that the method can be used only by adding corresponding numerical control codes without changing a main structure of a machine tool, main driving force of the machine tool can be fully used in a rough shaping phase, instability of the machine tool is reduced, shaping time is shortened, shaping cost is reduced, and shaping efficiency is improved.

Wei Wang

Papers

Gear shaping method based on equal cutting area