Pressure and temperature precisely controllable hot pressing molding device for friction material

Abstract

The invention discloses a pressure and temperature precisely controllable hot pressing molding device for a friction material. A hot pressing system comprises an output acquisition card and a hot press. A computer display control system comprises an input acquisition card and a computer. An intelligent die system comprises a pressing body, a die and a sensor, a through hole is formed in the die, the sensor is arranged in the through hole, the pressing body comprises a bearing block, a sensor carrier and a main pressing body, an upper zone of the main pressing body is a bearing block connecting zone, the bearing block is inserted in a hollow part and connected with the main pressing body, a middle zone of the main pressing body is a sensor carrier connecting zone, the zone is in a shape of a groove, the sensor carrier is embedded in the groove, and a lower zone of the main pressing body is of a solid structure; the sensor is vertically mounted in a deep hole in the sensor carrier. The intelligent die system, the computer display control system and the hot pressing system are sequentially connected. Accurate and intelligent automatic control is realized over the hot pressing molding key technical parameters of the friction material, and temperature and pressure values required by the molding of the friction material in the die are accurately regulated.

Description

technical field [0001] The invention relates to a hot pressing forming device, in particular to a friction material hot pressing forming device with precisely controllable pressure and temperature. Background technique [0002] The friction material is an important component material of the brake. It is composed of four main components: organic binder, reinforcing fiber, friction performance regulator, filler and other compounding ingredients. The friction material composition has a decisive influence on its performance. Excellent friction coefficient, strong wear resistance, good physical properties and other characteristics. At present, the forming processes of friction materials mainly include hot pressing, cold pressing and warm pressing. Although the cold pressing and warm pressing processes have low processing noise and low cost, and have a great effect on improving the processing environment, they are still in the exploratory stage. The technology is not yet mature e...

AI Technical Summary

Problems solved by technology

At present, the forming processes of friction materials mainly include hot pressing, cold pressing and warm pressing. Although the cold pressing and warm pressing processes have low processing noise and low cost, and have a great effect on improving the processing environment, they are still in the exploratory stage. The technology is not yet mature enough, but as a mature, simple and widely applicable process technology, hot pressing has been widely used in the forming of friction materials

[0003] The existing hot pressing forming system for friction materials is mainly composed of molds and hot pressing machines. Although its technical application is relatively mature, it still has the following disadvantages: 1) The hot pressing process can only be set by manually adjusting the hot pressing machine The temperature and pressure values ​​required in the hot press, and due to the influence of many intermediate media between the hot press and the hot press material, insufficient equipment accuracy or even equipment failure, the set value of the hot press and the actual temperature in the hot press mold body There is a deviation between the values; 2) Although the existing hot press has been able to achieve feedback adjustment, it is still aimed at the hot press itself, monitoring the temperature and pressure of the hot press, which cannot reflect the friction material in the mold body at all. Attribute values ​​such as temperature and pressure cannot be accurately adjusted according to bad working conditions such as heating and pressure instability in the mold; 3) Although the mold design has begun to develop in the direction of intelligence, the intelligence applied to the forming of friction materials There are very few molds, and most of the existing smart molds can only install a specific sensor to monitor a single signal, while the functions of a few smart molds that can monitor multiple signals are limited to signal display and abnormal conditions. Alarm, and can not realize the feedback control of pressure and temperature

For example, the search found that: Chinese patent CN 104139033 A discloses a smart mold, which monitors the temperature in the mold by connecting the temperature alarm device installed on its base with the display, but it can only monitor the temperature of a single signal. In addition to the shortcomings of monitoring, it is also impossible to achieve feedback regulation on abnormal conditions

Chinese patent CN 103230977 A discloses an embedded integrated mould, which realizes the monitoring, display and control of multiple signals by installing temperature, pressure, speed, displacement and other sensors at different positions inside the mould, but it can only be reproduced At the same time, according to the original recorded data, the working condition parameters are regulated within a reasonable range, and it is still impossible to implement timely and accurate adjustments to the abnormal changes in the mold during the processing process.

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