42results about How to "Solve clamping difficulties" patented technology

The invention provides a horizontal micro-electric spark machine tool for manufacturing a microelectrode. The machine tool comprises a machine tool base (1), an X-Y two-dimensional workbench (2), an electrode main shaft (3), a grinding wheel grinding mechanism (4), a Z direction workbench (6) and a wire electric spark grinding mechanism (7), wherein the grinding wheel grinding mechanism (4) and the wire electric spark grinding mechanism (7) are fixedly arranged on the machine tool base (1) and positioned on both sides of the Z direction workbench (6) respectively; the electrode main shaft (3)is arranged on the X-Y workbench (2); a tool electrode to be processed is arranged on the electrode main shaft (3); and the X-Y two-dimensional workbench (2) drives the tool electrode to move relative to the carborundum grinding wheel grinding mechanism (4) and / or the wire electric spark grinding mechanism (7) so as to finish online manufacturing of the microelectrode. Online grinding of a carborundum grinding wheel is combined with online grinding of wire electric sparks and a high-accuracy optical grating ruler is adopted, so that high-efficiency and high-accuracy manufacturing of a micro-scale electrode is realized and high reliability and good economic benefit are achieved.

A positioning device used for connection rods and shell parts. The device comprises a positioning sleeve device, a hydraulic device, an in-sleeve transmission device and a guide pin device. One end of the in-sleeve transmission device is connected with the guide pin device, and the other end of the in-sleeve device penetrates through the positioning sleeve device and is connected with the hydraulic device. The in-sleeve transmission device comprises a pulling rod and a pulling nail, a T-type groove is formed in the end, close to the hydraulic device, on the pulling rod, the pulling nail is arranged in the T-type groove, and the pulling nail is connected with the hydraulic device. The other end of the pulling rod is evenly provided with dovetail inclined concave grooves. The guide pin device comprises a plurality of guide pin sets evenly distributed on the positioning plane. Each guide pin set comprises a guide pin and a positioning screw. A dovetail inclined convex groove is formed in one end of the inner side of each guide pin, and the shape, and the size and the position of each dovetail inclined convex groove correspond to those of the corresponding dovetail inclined concave groove. One end of the inner side of each guide pin extends to the axis of the in-sleeve transmission device. A flat bottom thread is arranged at one end of the outer side of each guide pin. The positioning screws are installed on the flat bottom threads. The positioning device has the advantages that a hydraulic expansion core positioning pin can achieve high-precision positioning, the parts can be easily clamped, and the problem that clamping for ensuring high-precision positioning is difficult is solved.

The invention provides a measuring device and a measuring method for welding seam strength. The measuring device comprises a fin slot and a substrate slot, wherein the fin slot is a square structure; the side surface of the fin slot is provided with a wedge-shaped slot; the width of the upper end of the wedge-shaped slot is smaller than that of the upper end of the fin slot; the wedge-shaped slot is used for fixing a fin of a sample; the substrate slot is a square structure; and the side surface of the substrate slot is provided with a T-shaped slot which is used for fixedly mounting a substrate of the tested sample. According to the measuring device and the measuring method for the welding seam strength, a welding seam is fractured before a fin in a test sample tensile test process; meanwhile, the device can be used for clamping fins at the two sides, and can apply tensile force in a direction perpendicular to the plate surface of a composite plate, so that an inclination problem is avoided, the tensile strength value of a braze-welding welding seam can be measured more accurately, and the measuring accuracy is improved.

The invention discloses a tool electrode assembly which comprises a fixed component, a screw and a cylindrical tool electrode, wherein the middle part of the fixed component is provided with a through hole, the inner diameter of the through hole is corresponding to the outer diameter of the tool electrode, the fixed component is also provided with a threaded hole perpendicular to a shaft axis of the through hole, the threaded hole is communicated with the through hole, and the threaded hole is in screw-thread fit with the screw so as to carry out fastening on the tool electrode inserted into the through hole. The tool electrode assembly takes the fixed component and the screw arranged on the fixed component as necessary components for driving the tool electrode, so that the problem that previous slender tool electrodes are uneasy to clamp is solved, and a fixture structure of a grinding wheel repair machine is simplified. In addition, the invention discloses a grinding wheel repair machine which comprises a rack, a feed adjustment device, a clamping device and a driving device; and the grinding wheel repair machine has the advantages that the structure is simple, a tool electrode is installed conveniently, the repair effect of a grinding wheel is good, and the like.

The invention discloses a processing technology for precise forming of a hemispherical body of a large thin-walled storage tank, which comprises the steps of plasma gas cutting, stamping forming, cutting, shaping, finishing the inner spherical surface, finishing the outer spherical surface and surface treatment. The hemispherical diameter of the large thin-walled storage tank in this application is φ925, the wall thickness is φ0.3, and the ellipticity is φ0.3. The diaphragm type storage tank has high requirements for size, and it is very difficult to CNC process, especially the material used is aluminum alloy, which has insufficient strength and rigidity. , the processing deformation is large, the processing is difficult, and because the diaphragm tank is a large-diameter hemisphere, the surface line speed changes with the height of the part. When turning, it is necessary to select different spindle speeds for different rings to further improve This application explores the use of ultrasonic measurement and design and manufacture of special tooling expansion and clamping for CNC machining, the wall thickness tolerance ellipticity of the upper and lower hemispheres of the storage tank is Φ0.3, and the tensile strength after heat treatment is σ b ≥340MPa, elongation greater than 10%.

The invention discloses a stepped shaft forging method in free forging, which includes the steps of forging a blank to be a regular octagonal piece before the process of flattening, then calculating the volume of the material of each step, converting the volume of the material to the length of the material of the regular octagonal section, and finally flattening the corresponding positions of theblank. By forging the blank to be a piece with a regular octagonal section instead of a round section before the process of flattening in the processes of forging and stamping the stepped shaft, the method effectively solves problem of difficulty in holding the blank and ensures right flattening positions. The regular octagonal section is close to the round section in shape, so the material can be saved in the late rounding process. The method improves production efficiency and product quality and reduces defective and waste product rates.