56results about How to "Improve riveting strength" patented technology

A bicycle drive chain for transferring drive force to at least one chain wheel. The chain includes a plurality of inner and outer chain links connected by pins. Chain rollers surround the pins. The inner and outer link plates have the same outer contour but have different profiles. The outer link plates have a protruding region extending from a concave section and the inner link plate includes deflection chamfers located on an outer surface. The outer link plate further includes chamfers diagonally opposed from each other located at first and second convex sections on an outer surface. The inner link plate has chamfers located on an inner surface that taper off near ends of the inner link plate.

A self-piercing nut has a main threaded cylinder ( 2 ) and a pilot ( 5 ) surrounding a threaded bore ( 3 ). The main cylinder has a lower end continuing to a flange ( 4 ), with the pilot ( 5 ) protruding from a central bottom of the flange so as to pierce a hole in a metal panel ( 11 ). A skirt ( 7 ) depends from the flange's periphery to serves as a seat ( 8 ) contacting the panel. An annular groove ( 9 ) is defined between the pilot ( 5 ) and skirt ( 7 ) such that the pilot is projected beyond the seat ( 8 ). The end face ( 6 ) of pilot has an outer diameter 'B' larger than that 'A' of the lower end of main cylinder ( 2 ). The outer periphery of pilot ( 5 ) is tapered to decrease its diameter inwards and to-wards the nut axis, and a corrugation ( 10 ) is formed in the outer periphery or in the inner periphery of skirt ( 7 ).

Through hole is made along axial of eccenter. There is a ridgy wall part at upper part of the through hole or a notch is setup at center on outer edge of wall part. Inner edge face of the wall part is bent as circular arc face, and two crossed flatten faces are positioned at lower part of the through hole. Axis of rotation of motor is inserted into the through hole of eccenter, and riveting the wall part fixes the eccenter on the motor. Since the said notch is a weak part, when being riveted, the wall part is pressed down to the axis of rotation. When being riveted the wall part will not be chapped since inner edge face is a circular arc face bent along axis of rotation. Wall part of the invented eccenter is not easy to be damaged and riveting intensity is increased.

The present invention provides on-line cold bent steel fast punching and riveting mold and method, and belongs to the field of plastic forming technology for metal. The punching and riveting mold includes two parts, the upper and the lower molds, guided with guide column and guide sleeve, the male punching and riveting mold with holder on its one side and the female punching and riveting mold are fixed onto the left block and the right block of the lower mold, and the male punching and riveting mold and the female punching and riveting mold are shifted horizontally by means of one inclined wedge and the left block and the right block. The cold bent shaped steel are punched and riveted by means of the hydraulic cylinder and the punching and riveting mold. The shaped steel is located precisely so as to realize the fast on-line fast punching and riveting. The present invention has the advantages of simultaneous connection of several points, high punching and riveting quality, long mold life, etc.

The invention discloses a hot riveting rod for a hot riveting machine. The hot riveting rod for the hot riveting machine comprises a riveting rod body, wherein one end of the riveting rod body is provided with a hot riveting head, and the other end of the riveting rod body is connected onto a riveting rod supporting column; the riveting rod body is made of a stainless steel material, and a waist-shaped groove is arranged on the riveting rod supporting column; and the hot riveting head is in a mushroom shape, and is made of beryllium copper. According to the hot riveting rod for the hot riveting machine provided by the scheme of the invention, the heat insulation effect of the riveting rod body is added, so that the heat of a heating tube is mostly concentrated on the hot riveting head, the hot riveting head is heated faster and the temperature is more stable, the riveting strength of the hot riveting machine is increased, the cost is reduced, the smooth appearance of riveting points is ensured, the shape is stable, and the welding strength is high.

The invention relates to the technical field of ultrathin plate riveting, in particular to a laser opposite impacting and riveting method and device for ultrathin plates. The device comprises a watercurtain generator, a water tank, a water pump, pulse laser devices and a computer terminal. The water curtain generator is mounted above the water tank, and the water pump is arranged on a connectingpipeline between the water curtain generator and the water tank, so that water in the water tank is cyclically utilized. The two pulse laser devices are symmetrically arranged on the left side and theright side of a water curtain formed by the water curtain generator. The computer terminal is used for controlling the pulse laser devices. By means of the method, lasers are emitted from the left side and the right side at the same time to impact the plate on the right side, the deformation mode of traditional laser impacting forming is changed, plate deformation is increased, then the embeddedamount of the interlocking structure is increased, the rivet-buckling structure is optimized, the connecting strength of riveted positions is improved, and forming efficiency is high.

The invention relates to an inside riveting die of a hydraulic clutch bearing gland. A lower fixing plate is arranged on the upper end face of a bottom plate. A lower die fixing plate is arranged on the upper end face of the lower fixing plate. A split lower die insert is embedded in the middle of the upper end face of the lower die fixing plate. A cylindrical protrusion is arranged in the middle of the upper end face of the split lower die insert. The outer ring of the upper end of the cylindrical protrusion is bent outwards. A locating through hole is formed in the cylindrical protrusion of the split lower die insert. The split lower die insert is evenly divided into multiple fan-shaped columns. The lower portion of each column is transversely provided with a reset spring. A core rod moving up and down is arranged above the locating through hole in the split lower die insert. The lower end of the core rod is of a circular truncated cone columnar structure matched with the locating through hole, wherein the diameter of the lower end of the structure is smaller than that of the upper end of the structure. The inside riveting die of the hydraulic clutch bearing gland has the beneficial effects of being simple in structure, convenient to use, capable of being suitable for hydraulic release bearings of different models, increasing the riveting speed of the bearing glands greatly and meanwhile, improving the riveting strength of the glands and the like.

The invention discloses a method and device for improving the laser shock riveting forming connecting strength. The method includes the following main steps that firstly, a resin mixture and a curingagent are mixed according to a certain proportion, and a formed pasty mixture serves as a filling material; afterwards, a central controller controls a laser device to transmit laser beams, the laserbeams are transmitted to a worktable through a light guide arm and a focus head to excite an adsorption layer material to be plasma shock waves to shock an upper layer plate, and a hollow riveting structure is formed by the upper layer plate and a trepanned lower layer plate under the constraint of a lower female die; and the central controller adjusts a peristaltic pump to extrude the filling material so that the filling material can be injected into the hollow riveting structure through a material spraying nozzle, after the filling material is solidified, hollow riveting becomes solid riveting, when the riveting structure is subjected to the effect of normal force and shearing force, the cured filling material can have a supporting effect on the riveting structure, and therefore the riveting connecting strength is greatly improved.

The invention relates to a shield for fixing the torsion spring at the front end of a camshaft phase adjuster, which has a shield which is pressed by stacking the tail of the rivet and riveted with the cover plate of the phaser; The clad outer ring is integrally formed in a "convex" shape, and the center of the shield is provided with an avoidance hole for easy assembly and disassembly of the central bolt; the torsion spring cover is provided with a torsion spring fixing port; the clad outer ring has a ring array There are four avoidance grooves which facilitate full threaded contact between the mounting screw and the cover plate and increase the screw tightening force, and four shield rivet holes which are concentric with the rivet holes on the cover plate of the phaser and correspond one-to-one. The present invention not only solves the problem of poor fit between the central bolt and the phaser and large leakage, but also solves the problem of difficulty in installing the torsion spring and the risk of loosening during installation and transportation of the torsion spring. At the same time, the cylindrical torsion spring The structure reduces the centrifugal force of the torsion spring and improves the service life and safety performance of the torsion spring.

The invention discloses a feeding, heating and auxiliary riveting method for riveting shafts. The method comprises the steps as follows: a grabbing manipulator grabs a group of riveting shafts from a conveying belt, rotates and sends the riveting shafts to the position below a clamping and feeding device; a pushing driving device drives a pushing device to rise to push the group of riveting shafts into a group of shaft accommodating cavities; when the riveting shafts reach the set positions, a clamping driving device operates, and clamping devices clamp the riveting shafts; a telescoping driving device drives telescopic arms of heating devices to extend, and heating ends make contact with riveting parts of the riveting shafts for heating; a feeding driving device operates, the clamping and feeding device moves to the position below to-be-machined sheet metal at a riveting station; and the feeding driving device operates continuously, and the clamping and feeding device drives the group of riveting shafts to be embedded in corresponding riveting holes. The production efficiency and the automation degree of production are increased; fine adjustment of the perpendicularity is performed while the shafts are clamped, and the riveting precision is guaranteed; riveting is performed after heating, and thus the riveting precision and strength are enhanced.