The production process of automobile brake pads
The production process of automobile brake pads
At present, automotive brake pads are a mature technology, and their process is very important. Below I take the automobile brake pads manufacturing process of my company as an example to introduce the production process of automobile brake pads.
一、Cleaning
1.Wear personal protective equipment and ensure that there is sufficient cleaning solution in the cleaning tank and each liquid storage box.
2. First, add sufficient cleaning liquid to the cleaning tank and liquid storage tank. Before starting the cleaning line, check whether all kinds of instruments, electrical appliances and machinery are safe and reliable, and operate normally. Check the inlet and outlet valves and check whether the connecting parts of the pipes are leaking.
Turn on the power supply and turn it on successively: general control → ultrasonic → cleaning and heating → passivation heating → oven heating → front drying → back drying → cleaning pump → rinsing pump → passivation pump → hot air circulation → suction mist → outlet fan → transmission
3.Open the fan and circulating pump, press the oven and cleaning tank heating button after normal. After the temperature rises to the temperature specified in the process, it can work.
4.Inspect every four hours, whether the blower device is normal, inspect every two hours, whether the spray device is blocked. After cleaning the workpieces, after washing, passivation, drying into the sand blasting section.
5. After the cleaning is completed, all the work pieces flow out, turn off the power, and tidy up the site. Fill out all kinds of records.
二、Sand blasti
1. Add 250 kg steel sand to the drum successively.
2. According to the size of the steel back, put the appropriate amount of steel back into the roller.
3. Set it for 4-6 minutes.
4. Press the "Fan On" button to start the main fan.
5. Push buttons in turn to start: [lift open] [track turn open] [shot blasting device open] [shot supply gate open] to start cleaning work.
6. When the sandblasting time is up, press [lifting stop] first. After 1 minute, press [track stop] [wind mechanism] to stop processing.
7. Open the feeding door, put the iron basket at the discharge port of the shot blasting machine, press the "track reversal" button to pour out the steel back, and press the "track stop" button.
8. Repeat the above operations to complete the sand blasting process.
三、Hot pressing
1. Turn ON the power gear to ON, press the button < power start >, the LCD screen will light up, and input parameters according to the corresponding pressing process parameters to heat up.
2. Locate the corresponding mold according to the product model and install it on the press. Clean the dust and impurities on the surface of the middle model.
3. Extract the materials required by the processed product model according to the Process Instruction. Weigh the material with the specified cup according to the feeding amount.
4. When the mold temperature rises to the specified temperature, press < motor start > and then rotate the < rising and falling > knob to the descending gear to make the mold drop to the lowest level, and then brush the upper and lower mold and mold cavity with the appropriate amount of release agent.
5. Turn the "push out and push in" knob to push out the middle die.
6. Pour the material into the mold cavity and flatten it, clean the remaining material around the mold cavity with a brush, cover the steel back and ensure that the steel back is close to the mold. Press the < Auto Start > button to suppress.
7. After demoulding, check the surrounding distance and clean up the raw edge overflow, measure the thickness of the product, observe that the product surface meets the requirements of the attached drawing, and put the processed products neatly on the plate.
8. When pressing the next mold, if there is sticky material in the mold core, clean it with a small shovel first, and then evenly smear the release agent on the surface of the middle model. Repeat Step 5
四、Heat treatment
1. The friction sheet completed by hot pressing is neatly placed on the iron plate, which is placed on the iron frame in turn.
2. Place the whole frame of friction sheet on the platform, each platform is placed on a maximum of 6 shelves, and push the platform into the curing furnace after each platform is evenly placed.
3. Turn on the power switch.
4. Press "Select Process" on the touch screen to select the corresponding process according to the process guide. Press Home to return to the main screen.
5. Press [Operation] to open the operation interface, and press [Blast 1] [Blast 2] [heating 1] [heating 2] [exhaust air] successively to carry out hot processing of the product.
6. After the heating is completed, the operator will open the "operation", press the "heating close 1" [heating close 2] in turn, and open the intake valve below the right side of the oven. The blast and exhaust air shall not be turned off within 2 hours
7. When the temperature drops to room temperature, pull out the platform and transfer the friction sheet shelf to the next process.
五、Grinding machine
1、Wear personal protective equipment.
2、Check whether all parts of the machine tool are faulty, and whether the electrical equipment and start-stop switch are in good condition. It is strictly prohibited for slotted, flat grinding and chamfered grinding wheels to rub against splints and push baffles. Start slotted, chamfered motor and flat grinding (motor is required to move). And pay attention to confirm that the direction of rotation is consistent with that of the motor.
3、When the motor splint is adjusted up and down, the dust on the lead screw must be cleaned first. Slotted saw blade thickness 2.7mm slotted saw blade width less than 3.0. The upper and lower handles shall be adjusted according to the technical requirements. Left and right position handle. Lock after adjustment.
4、According to the technical requirements of the product, adjust the height of flat grinding and adjust the fine grinding motor to the thickness required by the product process. The coarse grinding motor is adjusted to the required thickness of 0.3-0.4mm. Position digital display X0 is the height of coarse grinding wheel, Y0 is the position of fine grinding wheel. Loosen the fastening screws to adjust the upper and lower handles, and lock the digital display value to the required value. Chamfering is calculated according to technological requirements, and the grinding wheel is advanced and withdrawn. Raise 2-3mm, and reduce the value according to the grinding test. Adjust and lock.
5、2-3 pieces must be processed before formal processing. The maximum upper and lower part of the clamping joint between the splint and the friction block is 0-0.1mm; The width difference between the two sides of the baffle block and the friction block is 0.05-0.1mm. The minimum height of the chamfer against the steel back die is left at 2-3mm to ensure that the chamfer wheel cannot grind the push baffle. If there is error fine tuning item adjustment. Confirm qualified before formal processing.
6、After finishing the work, clean up the dust inside the equipment, clean the surrounding area, and fill in the spot check list.
六、
1、Wear personal protective equipment.
2、Turn on the main power switch of the machine head. Turn on the heating successively, and heat the heating furnace 30 minutes in advance. At the same time, adjust the flow of gas to 0.5kg/cm2 to make the plastic powder in the powder box pre-flow in advance, clean the filter screen of the fan, the lower cavity of the filter screen, the dust bag, (open at least one cycle of back blowing, clean up before work every day) open the dust removal main engine.
3、Adjust the fluidized gas to 0.25kg/cm² to observe the state of plastic powder in the material box, whether it is uniform upward powder. At the beginning of work, the flow air is adjusted to 0.1, and the powder is subject to rolling when seen in the box. Then turn on the power of the left and right spray gun and adjust the static electricity to 1-3. Adjust the atomizing knob to about 0.5Kg/cm², and then adjust the powder supply knob to about 1-2kg/cm², and measure the powder thickness of the spray sample to meet the technical requirements. The values of each thermometer meet the technological requirements.
4、Open the transfer switch, adjust the appropriate speed, (to ensure that the uniform and thickness of the plastic powder spray meet the requirements, the product with a jet gun to blow off the surface of the impurities and dust, and then brush to clean up the plastic powder on the conveyor belt, on the drying road powder section of the feed port.
5. Turn on cooling and transfer. The product is thermoplastic, dried and cooled. And through the conveyor belt to the next process. The conveyor belt stops and no product is to be carried. Lunch, the night shift confirmed to bring no products before leaving the post.
Clean up the environment after the work is completed, and fill in the spot check list.
Finally, the product through the inkjet machine, riveting machine, automatic baler to complete the packaging process, brake pad production is completed
