Special attention should be paid to the following points during the use of the bearing housing:
(1) Use of the housing cooling system. The housing cooling water not only prolongs the service life of the housing but also increases production efficiency when used correctly. In actual production, we often overlook the importance of it, the operators also save trouble, pick up and take too much trouble, do not pick up the cooling water pipe, and some companies even do not want to save costs when customizing the bearing housing Cooling water has serious consequences. The material of the bearing housing is generally made of special bearing housing steel through various treatments. Even the best bearing housing steel has the limit of their use, such as temperature. When the bearing seat is in use, if the mold temperature is too high, it will easily cause the crack on the surface of the core early, and some bearing blocks will not appear more than 2000 mold cracks. Even if the bearing housing is in production, the core of the bearing has changed color due to the too high temperature of the bearing housing. After measuring, it even reaches more than 400 degrees. Such a temperature is prone to cracking of the turtle when the mold release agent is chilled. The products are also prone to deformation, strain, and sticking. In the case of using the housing cooling water, the use of the release agent can be greatly reduced, so that the operator does not use the release agent to lower the temperature of the housing. The utility model has the advantages of effectively extending the life of the bearing housing, saving the die casting cycle, improving the product quality, reducing the occurrence of sticking and straining and sticking aluminum, and reducing the use of the releasing agent. It also reduces the loss of the ram and core due to overheating of the housing.
(2) The bearing housing must be preheated during the production process to prevent the sudden occurrence of hot metal liquid in the cold bearing housing and the occurrence of cracks in the turtle. The more complicated bearing housing can be liquefied with a blowtorch. Gas, good condition with mold temperature machine, relatively simple bearing seat can use slow injection preheating.
(3) It is very troublesome to clean the parting surface of the bearing seat. It is easy to ignore. If the boss has a high starting point and buy a good bearing seat, it will work much easier if the bearing seat quality. It is not good. In production, it is inevitable that there will be flash or dirt on the bearing part parting surface. The operator should always clean these parts and equip with a small blade at any time (the company should prepare the tools for your employees). There are good guns to fight.) If the flash edge is not removed in time, the bearing parting surface is easy to collapse, causing aluminum to run during the production process. Once this result is caused, no matter how good the mold repair expert, the possibility of complete repair is very Small, not that they don't have the skills. The consequences of running aluminum have not only increased the cost of die casting, but also the waste of white aluminum, the quality of the product is also unstable, especially the internal quality, and the difficulty of determining the process parameters is increased. The qualification rate will drop a lot. From the perspective of safety, Increased the chance of a work-related injury. At the time of handover, the operator applies kerosene to completely clean the bearing part parting surface, which not only prevents the bearing seat from being crushed, but also can clean the residue of the release agent or other dirt on the bearing seat. The blocked venting groove is opened, which is beneficial to the gas discharge in the cavity during the injection process to improve the quality of the product. It is advisable to clean the parting surface twice in one shift. Let employees develop a good habit.
(4) If the bearing housing is equipped with neutron control, it is absolutely forbidden to have the signal line between the die casting machine and the bearing housing. The reason is very clear. In daily production, it is difficult to avoid water on the signal line, or The place where the joint is wrapped is easy to break, which causes the machine to be short-circuited. If a signal error occurs, the alarm will automatically stop and delay the time, and the signal will be disordered and the bearing seat will be broken. Cause unnecessary losses. The travel switch is waterproof.
(5) When each team takes over, seriously check the problem and find out the problem in time to avoid unnecessary trouble.
Furthermore: the responsibility of the mold repairing class plays a role of “disease cure, disease-free and strong body†in the maintenance and maintenance of the bearing housing. The task of one batch of bearing housing is completed, and the bearing housing is removed. The repairman must have a very detailed understanding of the bearing housing. For example, how many times the module has been produced so far, what faults have occurred, check the tail product to understand the current bearing status, and whether it is safe to use the bearing housing. Life, whether to report to the workshop according to the production volume, etc. ~ This must be checked the file of the bearing housing;
(1) The mold repairer must master a principle in the process of maintenance, repair and maintenance. It is absolutely not allowed to change the size of the bearing seat privately. Under such a premise, the work will be carried out~ If the original size is changed, the batch will be produced. The loss of quality accidents will be very heavy.
(2) During the maintenance process, the molder lacks awareness of the tools used. For example, in the process of polishing the bearing housing, the coarse oil stone is used, and some even the polishing machine is equipped with a hundred impellers to polish the core. Not only the surface of the core is deeply scratched everywhere, but also the nitride layer on the surface of the core is damaged, so that the next time the die casting is produced, it cannot be used at all, not a sticking mold or a strain. There are a lot of situations like this. The last time the bearing housing was produced well, I couldn’t do anything like this re-production. Apart from other external factors, this is a very important reason.
(3) For wearing parts such as ejector pins, cores, etc. should be carefully inspected, there are no bends, cracks, etc. If there is timely replacement, many cases are broken when the bearing housing is not finished, how many times the mold core is broken, most of them The reason for this was not carefully checked, and problems were not discovered in advance, resulting in a great waste of manpower and time.
(4) The polished bearing housing needs to be supplemented. Where there is sticky aluminum, where there is carbon deposit, it is polished to minimize the wear on the bearing seat caused by polishing.
(5) Respond to all moving parts of the bearing housing, and the joint parts, screws, etc. for lubrication and rust prevention.
(6) The bearing seat management personnel shall supervise the maintenance status at any time and pay attention to other management details. Make maintenance and repair records for your inquiry.
The storage of the bearing housing should be consistent with the account, drawings, files, etc. The bearing housing can not be opened and stored to avoid the loss of parts. The bearing housing that is not used for a long time is regularly rust-proofed. The new housing is subjected to stress relief as much as possible during the specified period to extend its service life.
In the process of maintenance and repair, some of them are quite simple and understand, but it is very difficult to do it. We need to do our due diligence and do our job. It is one of the three essential factors in production. The quality of the bearing housing directly affects the life of the bearing housing, the production efficiency and the quality of the product, and the cost of the die casting. For the die-casting workshop, the good maintenance and maintenance of the bearing housing is a powerful guarantee for the smooth operation of normal production, which is conducive to the stability of product quality, and greatly reduces the intangible production cost, thereby improving production efficiency. Based on the problems encountered in actual production, we will discuss how to make the maintenance of the bearing housing better.
First: build a housing file and get ready
(1) It is to establish a complete set of usage records for each bearing housing when entering the factory. This is an important basis for ensuring future maintenance and maintenance. Each piece must be meticulous and clear, including daily production. In order to be a bearing seat manager, after the bearing housing is in the factory, each part of the structural components must be recorded in the bearing housing file in detail, and the vulnerable parts in the bearing housing should be listed as needed. Prepare accessories in advance, such as ejector pins, cores, etc. ~~ Set the minimum inventory of vulnerable spare parts, so as not to delay production due to insufficient preparation. Because there are so many lessons in the company, there is no need to prepare. If the production is delayed because of the lack of spare parts, the cost to the die-casting enterprise is very large. Time, manpower, holding furnace electricity (or liquefied gas) are not small figures, and the main reason is delaying production. Delayed delivery loss will be even bigger!
(2) It is necessary to engrave the bearing housing itself with a permanent mark when it is used as a resume card, which is easy to distinguish. As long as the people who are not stupid will not cause the farce of the wrong bearing seat.
(3) If the bearing housing with the cylinder core puller is attached, equip it with a quick-change joint as soon as possible. Otherwise, the money was wasted every time you disassemble the oil leaking from the cylinder. You pay a few employees a month's salary. You can also use the money saved to improve the food for the staff. This also greatly shortens the time for the die-casting operator to load and unload the bearing housing, which is a matter of course. Remember to buy some good quality quick connectors, otherwise it will be counterproductive.
(4) Formulate the bearing seat management regulations in advance, conduct systematic training for employees, and implement them in a practical manner.
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