mac cosmetics wholesale Sand casting cylinder bloc

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,tory burch outlet
Sand casting cylinder block core group fixture design optimization


Look directly at the part surface, as far as possible with machining to complete its production. This will make casting tooling in appearance to the fine-level rise,mac cosmetics wholesale, changes in the traditional bulky cast tooling concept. 3 of the main institutions in the sand core positioning fixture in the core group, the main sand core (crankcase sand core) of the positioning mechanism is one of its important structures. Whether the sand core portfolio exact dimensional accuracy, qualified to meet the production requirements of the cylinder block of the process requires both reasonable and correct design casting process, the core must have the correct fixture, a reasonable positioning mechanism. As far as I can see for many years. Most of the cylinder block main group of core sand core fixture positioning mechanism, have generally use a smaller size (20x20x20mm) positioning block, and some small factories in order to compensate for this poor positioning accuracy of the positioning block is less than in the main body of each cylinder are set on the sand core of this small positioning block, the core group fixture even more complicated, and difficult to make complete and accurate positioning of the sand core; In order to make the whole set of sand core into the cavity under the accurate positioning mechanism is often used with multiple under the core complex fixture. To overcome these shortcomings, the author designed as shown in Figure 2 the large size of the sand core positioning mechanism: in the direction of the length of the cylinder, the cylinder at the center of the bearing, oil pan design with the corresponding section of the core sand core top high, width, thickness reached 3O ~ 4Omm positioning block, and the top surface of the cylinder (or the top cover on the sand core) is designed under the core height and the head-high, width, thickness always make the ;> 2oos. 5 horizontal bit support brace water chestnut water chestnut. Bong ¨ D ¨ DF. Li pattern almost pull round clip screw top and bottom hand L0MELTlNG melting of 30 ~ 40iTliTl positioning block. This large block of the positioning of the core group in the entire length of the fixture of the cylinder need only one pair can not only greatly optimized core group of fixtures, but also make the following simplifying core fixture. Therefore, I believe that the core group fixture to optimize an important part of the design is the positioning of the sand core casting a two arts agencies and the optimal design. Positioning block selection of both large and reliable combination of precision sand core, core clamps can also simplify the group (and the next core fixture) 4 dry liner cylinder block water jacket sand core group-core dry-cylinder car cylinder body There is usually a core group fixture important component agencies - water jacket sand core (most ten-type cylinder liner also cover the sand core) used by the group: the car. The agency's structure a variety of forms, according to the author of the study, divided according to their movement, unlike the Figure 3 to Figure 6 four forms. Figure 3 shows the core group of rail car structural design, production and simple, but its friction, rail wear volume, T Yi less effective. Figure 4 shows the roller core group of car,tory burch outlet, although more common in the production practice, the disadvantage is the design are more complex, the car positioning accuracy is poor, stuck or worn roller sand easily, so that the core group of lower accuracy, so The process results are not ideal. Figure 5 shows the roller core group of car, its main components using standard parts bearing exercise, so the car's high positioning accuracy, movement and core group of reliable,ghd planchas, easy to use and flexible, so the production of the most widely used. Figure 6 shows the core group of cylindrical lead car, the main components of movement can also use standard parts - linear motion bearings, although the difficulty of its production slightly, but the car's high positioning accuracy, movement reliable, it is in production get a more universal application. Ten years ago. Figure 5 shows the roller core group is also the author often used in car structures, also suggested that peers within the industry preferred, but as times progress, mainly domestic mold means and technologies to improve production. Figure 6 shows the core of the guide drum group, although the difficulty of making the car more than several other structures, but not a major problem. And. With the cylinder block castings to improve precision, but also need high-precision casting tooling. Therefore, selection guide shown in Figure 6 car drum core group gradually increased. In summary, for the dry cylinder liner of the core group of car, at the present stage of historical conditions, the preferred order should be: a roller a cylindrical guide roller a rail. Group 5 fixture support structure for the core group of core fixture support structure, and many plant processes or mold designers are often not paid enough attention. Some plants simply welded with angle iron to make a stand, and some plants simply use the gas cylinder up the stage to act as These methods not only to set the level of debug core fixture inconvenience. But not beautiful. Times is the eternal theme of tooling design. I believe that. Let the group die fixture is designed to achieve optimal, even such a simple bracket attachment structure. Has four height and size should be appropriate column. 6 Conclusion In my opinion, tooling design should not only practical, reliable, economical, but also look beautiful. 50 mm ≯. 1lll √ a
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