10results about How to "Avoid the knife" patented technology

The invention relates to the technical field of boring tools, in particular to an adjustable boring tool for stepped hole machining, which comprises a tool body, a tool apron is arranged at the lower end of the tool body, a tool bit is fixedly connected to the lower end of the tool apron, and the tool body is formed by combining an upper tool bar, a second tool bar and a tool bar sleeve; the tool has the beneficial effects that the tool is integrated with radial and axial adjusting mechanisms, so that the tool can be precisely adjusted in the radial direction and the axial direction in the machining process according to the diameters and the hole depths of different stepped holes, the upper portion of the tool bit is protected in cooperation with an introduced variable-diameter supporting mechanism, the tool apron and the tool bit are assembled and fastened, and the machining efficiency is improved. And effective support for stepped holes with different sizes is dynamically adjusted according to machining requirements, meanwhile, the rigidity of the tool is enhanced, the cutter relieving or vibrating phenomenon of a boring cutter is avoided, the grain cutting phenomenon of the boring inner wall is avoided, the flexibility of the cutter is improved, and the machining precision and stability are ensured.

The invention discloses an aero-engine high-pressure turbine blade tip grinding tenon tensioning device which comprises a front wedge-shaped ejector block, a trapezoidal ejector block, a rear wedge-shaped ejector block and a compression nut which are sequentially arranged in the middle of a screw from front to back. Pressure providing mechanisms are arranged between the front wedge-shaped ejector block and the screw head of the screw and between the rear wedge-shaped ejector block and the pressing nut. When the front wedge-shaped ejector block and the rear wedge-shaped ejector block extrude towards the middle at the same time, the trapezoid ejector block can be jacked upwards. The problems that in the existing tool manufacturing process, errors are generated, fit clearances are not uniform due to blade differences, and the defects of large outer diameter runout, size out-of-tolerance and the like are generated after the blades are ground due to the fact that the blades are too large in blade lifting in the grinding process are solved.

The invention relates to the technical field of guide wheels, and discloses a guide wheel manufacturing method and a guide wheel, the guide wheel manufacturing method comprises the following steps: bending a part of an outer ring of a first radial plate by a first preset angle, and bending a part of an outer ring of a second radial plate by a second preset angle; a first ring groove is formed in the inner ring of one axial end of the rim, and a second ring groove is formed in the inner ring of the other axial end of the rim; the first radial plate is fixedly welded to the first annular groove and the hub, and then the second radial plate is fixedly welded to the second annular groove and the hub. First pre-deformation can be manufactured by changing the bending angle of the outer ring of the radial plate, second pre-deformation can be manufactured by changing the axial depth of the first annular groove, third pre-deformation can be manufactured in the welding process according to the preset welding sequence, and the three pre-deformations are overlapped, so that after the heat treatment of the guide wheel is completed, the heat treatment efficiency of the guide wheel is improved. The end face of the hub is higher than the end face of the rim, so that the guide wheel can be subjected to a subsequent machining process.

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 invention discloses a clamping device for milling a double-journal blade, namely a milling machine. The clamping device comprises a base, a fixed assembly, a rotating assembly and a tensioning assembly, the base is provided with a mounting hole, and the fixing assembly and the tensioning assembly are arranged on the two axial sides of the mounting hole respectively. The two first bearings of the rotating assembly are perpendicular to the axis of the mounting hole. The first shaft section is located in the mounting hole, and the two first bearings are connected to the first shaft section in a sleeving mode; the outer diameter of the first bearing is equal to the shaft diameter of the mounting hole, and the shaft diameter of the second shaft section is smaller than that of the first shaft section; the tensioning assembly is provided with an axis, a tensioning bolt, a second bearing, an annular base plate and an annular cover plate, the second shaft section is sleeved with the second bearing, the second shaft section is sleeved with the base plate and the cover plate, and the tensioning bolt is in threaded connection with the second shaft section; the outer diameters of the base plate and the cover plate are larger than the shaft diameter of the mounting hole. According to the machining method, the double-journal blade can be prevented from deforming in the machining process, and the machining size of the double-journal blade is guaranteed.

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.

The invention discloses a movable center support for a processing machine tool, which comprises a center support main body and is characterized in that a moving structure, a clamping structure and a control panel are arranged on the center support main body, and the control panel controls the moving structure to move back and forth and controls the clamping structure to clamp and loosen. The center support is simple in structure, convenient to use and capable of moving along with a cutter, a fulcrum during machining is close to a machining point, cutter vibration and cutter back-off are effectively prevented, the stability of the machining size is guaranteed, and therefore more use requirements are met.

The utility model relates to a weeding mechanism and weeding equipment thereof, the weeding mechanism comprises a rotating roller and at least two cutting units, and the cutting units are spirally arranged along the axial direction of the rotating roller and are fixed on the circumferential surface of the rotating roller; the cutting unit comprises a plurality of cutting pieces, each cutting piece comprises telescopic seats and a cutting knife which are symmetrically arranged on the rotating roller, and the cutting knife is movably installed between the two telescopic seats; when the rotating roller rotates, the cutting knife can extend or retract in the radial direction of the rotating roller through the two telescopic seats, and the problem that when an existing weeding mechanism touches hard objects such as stones and tree roots, the knife is prone to being broken is solved.

The utility model relates to milling tool technical field, concretely relates to a kind of welded integral PCD spiral blade milling cutter. Welded integral PCD spiral blade milling cutter includes hard alloy cutter body and welded first PCD tool bit and second PCD tool bit, first PCD tool bit is provided with two, with first spiral cutting edge, two first PCD tool bit about the center of rotation of hard alloy cutter body is centrally symmetric distribution, second PCD tool bit penetrates hard alloy cutter body, second PCD tool bit has two second spiral cutting edge passing through the center of rotation and about the center of rotation and is centrally symmetric distribution;First spiral cutting edge and second spiral cutting edge all include the side milling edge part for side milling and the end milling edge part for end milling;Hard alloy cutter body is equipped with spiral chip groove on the side of each PCD tool bit.The utility model can solve the technical problem that traditional spiral blade milling cutter wears fast, and processing efficiency is low.

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.