Device used for preparing high-density powder metallurgy parts

A powder metallurgy, high-density technology, applied in the field of powder metallurgy, can solve the problems of increased cost of powder metallurgy parts, reduced mold life, increased mold manufacturing costs, etc., to reduce product shrinkage, ensure product accuracy, and reduce production costs.

Inactive Publication Date: 2009-12-02
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

A mold wall lubrication mold for warm pressing invented by Professor Cao Shunhua in China is realized through a hollow disc in the radial direction of the die die. During the high-speed pressing process, due to the high pressing energy and fast pressing speed, the resulting The pressing force is much larger than traditional pressing, so applying the above-mentioned invention to high-speed pressing technology will reduce the life of the mold, and the cost of making the mold will increase, resulting in an increase in the cost of the prepared powder metallurgy parts

Method used

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  • Device used for preparing high-density powder metallurgy parts
  • Device used for preparing high-density powder metallurgy parts
  • Device used for preparing high-density powder metallurgy parts

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Embodiment Construction

[0017] First the control system 8 (see Figure 4 ) to open, and then open the hydraulic system 5 (see figure 2 ), preheat the hydraulic oil for 10-20 minutes to make the oil temperature reach 30-40°C. At the same time, relevant parameters such as powder loading height, stroke height, and pressing times are input into the control system 8 (see Figure 4 ), and then run the device. First, the upper oil cylinder 16 (see image 3 ) to push the nozzle 21 (see image 3 ) to the upper surface of the mould, and then the die plate begins to rise to a preset height, while the nozzle 21 (see image 3 ) starts to spray powder, and the lubricating powder is adsorbed on the inner surface of the mold cavity under the action of air pressure. After the lubrication is completed, the concave die plate descends to the original position, and at the same time the nozzle 21 (see image 3 ) in the lower oil cylinder 17 (see image 3 ) rises to a certain height beyond the upper die punch and b...

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Abstract

The invention discloses a device used for preparing high-density powder metallurgy parts, and belongs to the technical field of powder metallurgy. The device comprises an impact unit (1), a side plate (2), a base (3), a die frame (4), a hydraulic system (5), a die wall lubricating device (6), a die wall lubricating system (7) and a control system (8). The device has the advantages that the combination of a high-speed pressing device and an electrostatic die wall lubricating device realizes the preparation of the high-density powder metallurgy parts (the density is higher than 7.4 g/cm) by carrying out automatic die wall lubrication during high-speed pressing without adding a lubricating agent into the powder, the product precision is ensured, the product shrinkage is reduced, the environment pollution is reduced, and the production cost of the powder metallurgy parts is reduced. Simultaneously, the operation and matching of steps of the device are controlled by a programmable logic controller (PLC), and the automatic production can be realized.

Description

Technical field: [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a device for preparing high-density powder metallurgy parts, which is suitable for forming powder metallurgy parts and can also be used for finishing powder metallurgy sintered products. Background technique [0002] 2001 at the American Metal Powder Federation, Sweden Skoglund Paul of AB Company proposed the High Velocity Compaction (HVC for short), which has many similarities with the traditional compaction technology in the production process, such as filling the mold, pressing and product demoulding, but this technology has more advantages than traditional pressing. The following advantages: ①High green compact density and uniform density distribution; ②Low radial elastic aftereffect, low demoulding force; ③Excellent comprehensive performance; ④High productivity and economical forming of large parts. As far as the preparation of high-density powder me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/00B22F3/03B22F3/24
Inventor 尹海清曲选辉王建忠张晓晗果世驹杨霞
Owner UNIV OF SCI & TECH BEIJING
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