In the last part, we talked about the equipment management of the die casting workshop. Today, Longhua Die Casting Machine will share with you another piece of dry goods knowledge: the installation and acceptance of the die casting machine equipment.

(1) Installation of die-casting machine According to the drawing requirements of die-casting machine manufacturers, the traditional equipment installation method is to first build the equipment foundation and reserve embedded holes for the feet (see Figure 2). Then, put the anchor bolts into the grout, and then fine-adjust the equipment after the concrete has solidified. After the fine adjustment is completed, it will take some time for the equipment to be used normally after the surrounding oil and water tanks are completed. It basically takes nearly one month. In the actual installation process, considering that the above installation method takes too long, we can completely use the embedded steel structure to install the equipment.

(2) Acceptance after installation The acceptance of the die-casting machine must first be based on the contract and the equipment test and acceptance record sheet, which is carried out one by one according to the acceptance items. When the manufacturer debugs the equipment, be sure to send someone to track the test and acceptance and record the test data.

   Among them, the accuracy of the coaxiality of the pressure chamber is extremely critical, which directly affects the service life of the punch and the pressure chamber in the later stage. It is a mandatory inspection item for the newly purchased die casting machine. For PLC-controlled die-casting machines, the inspection of the scale-up board is easily overlooked. The function of the proportional amplification board is to control the output current in proportion to the magnitude of the input voltage, thereby changing the pressure and flow of the proportional valve to control the hydraulic system (if it is a single proportional valve, only the pressure is controlled). Specifically, if the total pressure of the digital adjustment system in the control cabinet is 0 to 14 MPa and the total flow rate is 0 to 100%, the pointers of the two ammeters should generally make     corresponding linear changes from 0 to 0.8 A. The linear error is allowed. About 2%. If the linearity error is too large, the linearity of the proportional plate will be insufficient, which will have a great impact on the adjustment of the die casting process parameters.

   The supercharging and building pressure time cannot be measured specifically at the production site, and can only be estimated indirectly through the reaction of the pressure gauge pointer of the injection cylinder. The general approach is to adjust the boost delay, flow rate, and airbag pressure at a medium fast injection speed (such as about 3 m / s), watch the pointer of the injection cylinder pressure gauge change, and then close and close the fast injection speed. Adjust the boost pressure in the two extreme states of fully open. Watch the hand change. If you adjust it, there will be a pause in the middle of the hand, that is, the set pressure position cannot be reached at once, which indicates that there is a problem with the boost system. At the same time, it should be noted that if the pressure drop of the injection energy accumulator exceeds 1 MPa and the pressure drop of the pressure accumulator exceeds 0.5 MPa, it will have a significant impact on the filling of the die casting. Therefore, the energy storage of the die casting machine is not allowed. There is excessive pressure drop.

  The acceptance of the performance of the die casting machine is related to the quality stability of the die castings in the later production process. It should be paid enough attention to the acceptance of the equipment, otherwise it will bring unpredictable hidden dangers to the quality stability of the die castings. For example, during the use of the accumulator gas cylinder oil, and the instrument attached to the device is difficult to find, it will lead to quality problems such as poor molding of the die casting, increased air holes and so on.

3. Maintenance of equipment

  As an important production equipment of die-casting enterprises, the maintenance of the die-casting machine must attract the attention of managers. Correct maintenance and maintenance to reduce the failure rate of the machine is the basis for reducing maintenance costs and improving the utilization rate of enterprise equipment. Equipment maintenance and daily maintenance are directly related to the service life of the equipment and the smooth progress of "on-time" production.

The lubrication of the equipment is very important in the maintenance of the equipment. It is necessary to select the hydraulic oil and lubricant specified by the equipment manufacturer. For the maintenance of the oil circuit, first of all, ensure that qualified hydraulic oil is used, and the use of deteriorated, thickened and sedimentary hydraulic oil should be avoided; secondly, do not mix new and old hydraulic oil when changing the hydraulic oil. Be sure to use it after each oil change. Close the fuel tank cap. In addition, the use of lubricating oil and the consumption of hydraulic oil should be checked frequently. If there is any abnormality, it should be repaired in time.

  Most die casting machine strand lubrication uses a depressurized oil distributor. The so-called depressurization type means that when the lubricant pump motor stops working, each lubrication point starts to be oiled and lubricated. There is an indicator pin on each oil distributor, which is convenient to check the abnormality of each lubrication point, so that early detection and early maintenance can be found. In order to avoid damage to the pins and bushings.

  Other maintenance of the equipment, such as regular inspection of the equipment filter, cooler and accuracy of the equipment, can be performed in accordance with the manufacturer's instruction manual.

In addition, the following matters must be paid attention to when repairing the equipment:

(1) Do not step on the sheet metal parts and guide rails with your feet.

(2) Don't hit various parts of the machine with tools.

(3) Parts and safety doors and safety shields removed during machine maintenance shall be as they are and on fashion.

(4) The power should be cut off during electrical maintenance.

(5) When repairing and replacing hot work parts, they should be cooled down before operation.

(6) Do not remove the electrical ground wire.

(7) Make equipment maintenance records to facilitate troubleshooting and regular maintenance.

4. Conclusion

  To do a good job in the management of die-casting machines for die-casting enterprises, we must take seriously and do a good job of research before the purchase of equipment, which can greatly reduce some equipment problems that may occur in production and play a role in ensuring the quality of die-casting products.

  The above is the article shared by Longhua Technology for you. I hope these two articles can help you choose your die casting machine. For more information, please follow us.