3results about How to "Avoid the knife" patented technology

The present application relates to the field of industrial control technology, in particular to a shear parameter adaptive control method and system for multi-hardness materials, which comprises pre-pressing and applying a micro-disturbance signal to the material to be processed, extracting the complex impedance spectrum characteristics of the dynamic mechanical response to construct the frequency domain fingerprint of the internal heterogeneous structure; predicting the load mutation based on the fingerprint to generate a virtual control trajectory based on the shear knife holder displacement; using a predictive trajectory planner to calculate the feedforward torque compensation, superimposing it with the position feedback adjustment amount to generate the optimal blade gap and shear speed cooperative motion instruction adaptive to the current hardness; the present application realizes non-destructive detection of internal hardness mutation of the material through frequency domain fingerprint technology, and uses the feedforward compensation mechanism based on inverse dynamics to adjust the driving torque and mechanical gap synchronously before the shear mutation occurs, solving the problems of response lag and easy blade collapse in the processing of heterogeneous materials.

The application discloses a machining method of a casing inner cavity weight-reducing groove and a casing, and the machining method comprises the following steps: using a milling cutter with a diameter greater than twice the radial allowance width of the casing inner cavity weight-reducing groove, and extending the milling cutter into the casing inner cavity along an axial direction; adopting a deep hole peck drilling mode to perform axial plunge milling along the weight-reducing groove, and performing interval plunge milling along a circumferential direction for multiple times to form a plurality of lace grooves and assembly bosses; wherein, when the axial plunge milling is performed, the circumferential direction and the width direction of the radial allowance of the weight-reducing groove are combined into one layer and are milled through by one cutter. The machining method adopts the milling cutter with the diameter greater than twice the radial allowance width, improves the cutting force of the cutter, and reduces vibration and the phenomenon of broken edges in the machining process; the machining method adopts the machining mode of one cutter from top to bottom to penetrate and mill the circumferential direction and the width direction, improves the machining efficiency, and the main stress of the milling cutter in the drilling and milling process is an axial force, so that the acting force on the radial cutting force of the machine tool is greatly reduced, and the deformation of the casing can be reduced.

This utility model provides a fabric cutting device for an overlock sewing machine based on a composite cutter. The fabric cutting device includes a movable upper fabric cutting blade, a fixed lower fabric cutting blade, and a cutting blade driving mechanism. The upper fabric cutting blade includes an upper blade base and an upper blade shearing part fixed at the lower end of the upper blade base. The lower end of the upper blade shearing part is provided with an upper blade edge and an upper blade guide limiting part extending downward from the tail of the upper blade edge. The upper blade shearing part is made of cemented carbide. The lower fabric cutting blade includes a lower blade edge at the top. The hardness of the material of the lower fabric cutting blade with the lower blade edge is lower than that of the upper blade shearing part. During the process of the cutting blade driving mechanism to engage the upper and lower fabric cutting blades, the upper blade guide limiting part is close to one side of the lower fabric cutting blade, and at least a portion of the part of the lower fabric cutting blade that is close to the upper blade guide limiting part is made of cemented carbide. This application effectively extends the service life of the upper and lower fabric cutting blades, reduces the operating cost, and improves the fabric cutting effect.