First of all, the product drawings or disks provided by the customer, understand, see through, analyze the material, thickness and tolerance of the product: (1). Confirm the quality of the materials: commonly used steel plates (such as SECC), stainless steel (such as SUS304), aluminum alloy, the expansion coefficient a of these products are not the same,
The hardware mold design generally works according to the following flow chart:
First of all, the product drawings or disks provided by the customer, understand, see through, analyze the material, thickness and tolerance of the product:
(1). Confirm the quality of the material: commonly used steel plate (such as SECC), stainless steel "target=_blank> stainless steel (such as SUS304), aluminum alloy, the expansion coefficient a of these products are not the same, the general steel plate is 0.4, stainless steel "target= _blank> Stainless steel is 0.45 and aluminum alloy is 0.43. (refers to L song).
(2). Analyze the tolerance of the product map: Generally speaking, the key dimensions on the product map have tolerances. From the product map designer, of course, the smaller the tolerance, the better, to ensure the ultimate goal of the designer. However, in terms of mold design and processing capability, this is very demanding, because it adds difficulty to the mold designer and mold processing. In order to solve this contradiction, it requires friendly negotiation and sincere communication between the two parties. Under the premise of performance and quality, appropriately increase the dimensional tolerance of the product drawings. The mold designer should be good at determining the "target value" of the product drawing size. Generally, the inner diameter takes the upper limit of the tolerance, the outer diameter takes the lower limit of the tolerance, and some of the dimensions take the intermediate value, such as the pitch, the spacing, and the like.
(3). Draw the product map, add the target values ​​of the various parts in the product map, and then mark the size, check whether the drawings are correct or not.
(4). Draw the unfolded picture, use the drawn product picture to expand the picture, and the curved part should be compensated. The compensation amount x=expansion coefficient a * material thickness t, and the expansion coefficient is implemented with reference to the standard. It is to be noted that the curved line bends the inner line, and the curved line indicated in the unfolded view is the curved inner line.
(5). Confirm the type of mold: is it a continuous mold or a engineering mold? It is generally determined by the customer and sometimes by the designer. The principle is: 1 consider mass production; 2 consider batch quality; if it is determined to be continuous mode, first draw a layout drawing, establish a layout layer "P", and then determine the size and thickness of the template according to the width of the layout. The strength of the punch and the size of the die are confirmed based on the thickness of the material. Then write the template preparation book, including dimensions, heat treatment, quantity, etc.
(6). At the same time, the planar pattern of the mold has largely come out. After many discussions, the upper and lower plan and the group diagram are finally confirmed. The future work is the parts drawing, the board drawing and the list of purchased standard parts.
When designing a continuous die, the layout drawing and the joining drawing are to be confirmed by the customer. In particular, the product connecting drawing has a detailed shape and position.
(7). Set up, test the mold, submit samples, test the data, determine OK or NG, find out the cause, take countermeasures and retain the quality test data, and check the mold after improvement.
Hardware mold design confirmation, generally in the following aspects:
(1). Quality:
1. Fully understand the function of the product.
2. Whether there are stubborn shapes, parallelism, and dimensional tolerances in the product drawings.
3. Confirm the direction of the burr, material, and material thickness.
4. Conduct material research.
5. Confirm the final treatment of the product (such as electroplating, silk screen, etc.).
6. A hole that requires the accuracy of the bend, and is machined after bending.
7. The clearance is appropriate.
8. Confirm that the new product has no facets.
9. Check the benchmark and check if there is a problem with the direction.
10. Is there a measuring instrument for checking the product?
(2). Processing:
1. The position and quantity of the pilot pin are sufficient.
2. Whether to consider the scrapping of the scrap, and whether the discharge of the mold is smooth.
3. Whether the monitor is designed, the scrap rebound sensor.
4. The positioning plate and the floating pin are selected appropriately.
5. Whether to consider the punching power, whether the press selection is appropriate.
6. Whether the number, size and position of the bolts (including the discharge bolts) are properly selected.
(3). Gold type construction:
(1). Is the mold form appropriate?
(2). Can you use standard parts?
(3). Is the mold strength sufficient?
(4). Round inserts, square insert selection is appropriate.
(5). Whether or not the flatness is guaranteed.
(6). Confirm the avoidance and limit column.
(7). Is there an anti-reverse device?
(8). Unloading fully considers the amount of spring compression.
(9). Consider the condition of the mold.
(10). Whether the mold material is selected properly.
(11). Confirm the way the mold is installed on the punch
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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