Preparation method of automobile brake disc
A technology of automobile brakes and prefabricated bodies is applied in the field of automobile brake disc manufacturing, which can solve the problems of low carbon deposition efficiency, long production cycle and high process cost, and achieve the effects of uniform densification, reduction of production cost and improvement of densification efficiency.
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Embodiment 1
[0029] like figure 1 As shown, the invention provides a preparation method of an automobile brake disc, which consists of the following steps:
[0030] Step 1, using chopped carbon fiber and modified aminophenol resin as base material, and mixing, the formed mixture is used as prepreg;
[0031] Step 2: Disperse the mixed prepreg evenly on the tray, and dry it for later use;
[0032] Step 3, preparing an automobile brake pair prefab;
[0033] Step 4: carbonizing the obtained automobile brake pair preform, and infiltrating and curing;
[0034] Step 5, carrying out high temperature treatment on the obtained semi-finished product of the automobile brake disc after impregnation and curing treatment;
[0035] Step 6. The semi-finished product of the automobile brake disc that has been processed for many times is weighed to measure the density;
[0036] Step 7. Finish the semi-finished product of the brake disc according to the drawing requirements.
[0037] The mass ratio of ch...
Embodiment 2
[0040] like figure 1 As shown, on the basis of Embodiment 1, the present invention provides a technical solution: preferably, step 3 further includes placing the pre-pressing head in the mold cavity, and starting the hydraulic press, and laying the pre-pressing head on the mold mold The prepreg in the cavity is pre-pressed, the applied pressure is 7.0Mpa, the pressing time is 1-2min, and the pressing temperature is 120 degrees Celsius to obtain a preform with ventilation grooves and mounting holes on the surface, complete the pre-press, press and cure During molding, metal embedded parts are placed in the ventilation groove of the preform blank. Step 3 also includes continuing to fill the mold cavity with a second prepreg, then clamping the mold, and then using a hydraulic press to pressurize and pressurize a second time. Pressing and curing is carried out by means of step heating, and then it is demolded to obtain a preform of an automobile brake disc.
[0041]In addition, t...
Embodiment 3
[0043] like figure 1 As shown, on the basis of Embodiment 1, the present invention provides a technical solution: preferably, step 4 also includes placing the obtained automobile brake disc preform into a muffle furnace, and evacuating it to less than 1KPa Start to heat up, when the temperature rises to 150 degrees Celsius, keep warm for 2 hours. After the heat preservation is completed, the temperature in the furnace is raised to 900 degrees Celsius, and then the temperature is kept for 2 hours. With the cooling of the furnace body, take out the car brake disc preform, and then put it in the furnace. Put it into the dipping furnace with polycarbosilane solution, the dipping time is 1-2 hours, take it out after the end, and carry out drying treatment to obtain the semi-finished product of automobile brake disc. Step 5 also includes, the temperature during heat treatment is 1000 degrees Celsius - 1200 degrees Celsius, and keep the temperature for 1-3 hours. Step 6 also includes...
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