An automatic feeding and forming device for metal powder metallurgy

Abstract

The invention discloses an automatic feeding and molding device for metal powder metallurgy, which belongs to the technical field of metallurgical equipment. The technical solution is: an automatic feeding and forming device for metal powder metallurgy, which includes a frame, a crushing mechanism, a feeding mechanism, a weighing mechanism, a position limiting and leakage mechanism and a forming mechanism. The beneficial effects of the present invention are: when the present invention is used in powder metallurgy, the metal powder feeding is fast, the whole process is automatically controlled, the grinding mechanism is set, the metal powder on the first time is ground again, and it is transported to the weighing mechanism by the feeding mechanism for measurement and control. Feeding accuracy, limit leakage mechanism according to the weighing mechanism to limit whether the weight of the metal powder reaches the weight value set by the standard; the hydraulic cylinder makes the stamping die reach the predetermined pressure and extrusion speed in a short time, which is convenient for passing the measurement. The continuous molding of metal powder is suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to an automatic feeding and forming device for metal powder metallurgy. Background technique [0002] In powder metallurgy production, the particle size of metal powder is generally required to be 0.5-20 microns, because theoretically speaking, the finer the particles, the larger the specific surface area, and its surface effects, such as surface activity, surface adsorption capacity, catalytic ability, etc. stronger. The easier it is to form and sinter, the traditional powder metallurgy process generally uses coarser powders larger than 40 microns, which cannot meet the metallurgical production requirements of good surface activity, high adsorption capacity, and high curing capacity. [0003] In addition, the control of powder metallurgy feeding accuracy also has a great impact on the quality of powder metallurgy products. The feeding accuracy affects the size and ...

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Problems solved by technology

[0007] The inventive idea of ​​the present invention is: in view of the current powder metallurgy production, the powder metallurgy process adopts coarser powders larger than 40 microns, which cannot meet the metallurgical production requirements of good surface activity, high adsorption force, and Cuihua ability, and the powder metallurgy feeding accuracy Due to the inability to achieve automatic control, and the problem that the predetermined pressure and extrusion speed cannot be reached in a short period of time, which affects the forming of metal powder, the present invention designs an automatic feeding and forming device for metal powder metallurgy, a metal powder metallurgy Automatic feeding and forming device, including frame, crushing mechanism, feeding mechanism, weighing mechanism and limit leakage mechanism; pour metal powder from the feeding port into the metal powder feeding bin, and pass through the turntable of the grinding mechanism in turn A through hole, the feeding metal powder leaks into the grinding track and is ground by the grinding disc. The ground metal powder is transported to the metal powder feeding bin of the feeding mechanism through the leaking pipe, and the feeding metal is transported by the spiral blade. The powder is transported to the feeding tube in the middle of the weighing pad of the weighing mechanism. When the weight sensor determines that the amount of metal powder to be fed reaches the weight set by the metal forming standard, the reduction motor B is turned on, and the moving gear moves along the fixed ring. The inner surface moves, and at the same time, it drives the limit block at the end of the driving rod to move along the shell to the base. All the metal powder falls into the hollow cylindrical syringe in the fixed chamber. Under the action of the elastic restoring force of the return spring, the metal powder in the hollow cylindrical syringe is injected into the hollow through the metal powder leakage channel set at the center of the upper part of the fixed mold. In the cylinder, at this time, the hydraulic cylinder drives the piston rod to move upward, the lower chassis and the lower stamping die are separated from the support frame, and at the same time the piston rod drives the extrusion block to move upward, and the extrusion block and the elastic support element together drive the lower stamping die to move upward until The extrusion groove cooperates with the hollow cylinder to realize the rapid extrusion molding process. The piston rod moves downward, and the lower chassis and the lower stamping die return to the original position together. At this time, the piston rod moves upward again to drive the extrusion block along the moving rod A , the moving rod B and the ejector rod move upwards to push out the metal module formed in the hollow cylinder and make it break away from the hollow cylinder. The bottom surface of the rectangular groove of the lower stamping die is in contact with each other, and the limit of the next metal powder feeding is repeated in this way, so as to accurately and quickly control the feeding accuracy of the metal and the forming process of the metal powder

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