The work content, precision and technical requirements of stamping die assembly:
i. Stamping die assembly work content
The assembly of stamping dies is a series of assembly processes carried out in a reasonable process sequence. Different types of stamping dies have different structural composition, complexity and precision requirements, and the specific contents and points of assembly are also different, but usually include the following main contents:
1. Cleaning and testing
All stamping die parts must be carefully cleaned before assembly to remove oil and various mechanical impurities attached to the inner and outer surfaces of the parts. Cleaning is of great significance to ensure the assembly accuracy and quality of the stamping die and prolong the service life of the stamping die. In particular, it is more important to ensure the assembly quality of precision stamping dies.
Before the assembly of the stamping die fitter, the main parts should be carefully inspected to understand which are the key dimensions, which are the matching and forming dimensions, the matching accuracy level and apparent quality requirements of the key parts, etc. , to prevent substandard parts from being used for assembly and damage to other parts.
2. Fix and connect
There are a lot of parts fixing and connection work in the stamping die assembly process. The connection of stamping die parts can be divided into detachable connection and non-detachable connection. Detachable Connections When removing interconnected parts, none of the parts must be damaged. After disassembly, they can be reassembled and attached, usually by screws and pins. A non-removable connection is one that cannot be removed during use of the connected parts. Commonly used non-detachable connection methods include welding, riveting and interference fit. Interference fits are widely used.
3. Supplementary processing and polishing of towels during assembly.
Before the assembly of the stamping die parts, not all the geometric dimensions and shapes of the parts are processed at one time; some parts need to have a certain margin, and the towels will be processed together with other supporting parts during the assembly process. to ensure consistency in size and shape. Some of them require some supplementary processing during assembly due to factors such as materials, heat treatment, and complex structures.
The surface polishing of the parts is also an important part of the stamping die assembly process. Molded surfaces with complex shapes or localized structures such as slits, grooves, and tiny blind holes need to be hand-polished by assemblers to achieve the final desired surface roughness.
4. Adjustment and research
Stamping die Assembly does not simply combine all the parts, but assembles these qualified parts with certain machining errors in an orderly manner according to the structural relationship and functional requirements. Assembly requires constant adjustment and study due to errors in part size and shape. Grinding refers to the appropriate grinding, scraping or drilling, reaming and grinding of the relevant parts. Grinding, scraping, and assembling are mainly aimed at the matching table or size in the assembly of formed parts or other fixed and sliding parts to meet the requirements of assembly accuracy. Drilling, reaming and grinding are mainly used for the matching or connecting assembly of related parts.
5. Stamping die action inspection
After all parts of the stamping die are assembled, it is necessary to carry out an overall linkage inspection of the movement of each part of the mechanism or moving parts according to the functional requirements of the stamping die to check the flexibility of its movement, the reliability of the mechanism, and the accuracy of its stroke and position. And the coordination of each part of the movement. In addition to the above main contents, the field test, loading and unloading, adjustment and modification after the test of the stamping die are also part of the assembly content of the stamping die.
ii. Stamping Die Assembly Accuracy Requirements
In order to ensure the quality of stamping dies and their molded products, the assembly of stamping dies should have the following precision requirements:
① Stamping die parts should meet certain mutual positional accuracy such as coaxiality, parallelism, perpendicularity, and inclination.
② The moving parts should have relative motion accuracy requirements, such as the rotation accuracy of various mechanisms, the rotary motion accuracy, and the linear motion accuracy.
③ The accuracy of guidance and positioning.
Such as the movable mold and the fixed mold or, the opening and closing motion guide of the upper mold and the lower mold, the installation and positioning of the cavity (concave mold) and the core (punch mold), and the guide positioning of the sliding motion, etc.
④ Matching accuracy and contact accuracy.
Fitting accuracy mainly refers to the fit clearance or interference degree that should be achieved between the surfaces of the parts to be matched with each other; such as the matching of the cavity and the core, the matching of the insert and the template hole, the matching of the guide post and the guide sleeve, the matching of the template Wait. Contact accuracy refers to the actual contact points of the two mating connection surfaces and the distribution of the specified contact area; such as the uniformity of the contact points on the parting surface, the contact area of the locking wedge slope, etc.
⑤Other accuracy requirements
Such as the tightening force, deformation, lubrication, and sealing of the stamping die assembly; as well as the vibration, noise, temperature rise and friction control of the stamping die. , should meet the working
requirements of the stamping die.
iii. Stamping die assembly technical requirements
1. Technical requirements for stamping die appearance
- The edges of the assembled stamping die template and exposed parts should be chamfered or rounded, as small as burrs and sharp corners; the outer surface should not have serious scratches, protrusions or dirt; nor should there be embroidery or partially unprocessed blank surface.
- According to the working state of the stamping die, a lifting ring or a lifting ring should be installed at the appropriate balance position of the stamping die; the multi-parting surface stamping die is locked with a lock plate to prevent the movable template of the towel from being damaged by vibration during transportation. .
- The overall dimensions, closing height, installation alignment and positioning dimensions, ejection method, and mold opening stroke of the stamping die should meet the requirements of the design drawings, and should be reasonably matched with the parameters of the equipment used.
- The stamping die must have a marking number, and each template must be marked with the serial number and the reference angle of processing and assembly.
- The connecting screws of the movable and fixed dies of the stamping die should be firm, and their heads should not be higher than the plane of the template.
- Various external auxiliary mechanisms of stamping die, such as “hook”, swing rod, lock, cooling water nozzle, hydraulic and electrical components, etc. The mold opening sequence is limited and should be installed in a complete, standardized and reliable manner.
2. Technical conditions of stamping die assembly
Different types of stamping dies have different requirements for assembly work and precision. In order to ensure the assembly accuracy of stamping dies, the national standard stipulates the assembly technical conditions of stamping dies. For specific regulations, please refer to the relevant national standards.
What are the metal stamping parts in daily life
1. Anti-theft windows
On the basis of the original windows of the building, a layer of mesh doors and windows with anti-theft protection function is added. The common types of anti-theft windows are divided into stainless steel anti-theft windows, color steel anti-theft windows, wrought iron anti-theft windows, aluminum alloy anti-theft windows, and zinc steel anti-theft windows.
2. Iron pot
Iron pans are traditional kitchen utensils for cooking food. They generally do not contain toxic substances, but they will oxidize when exposed to water. The main component is iron, and also contains a small amount of sulfur, phosphorus, manganese, silicon, carbon and so on.
The size switch used to control the water flow has the effect of saving water. The replacement of faucets is very fast, from the old cast iron process to the electroplated knob type, and then to the stainless steel single-temperature single-control faucet, the stainless steel double-temperature double-control faucet, and the kitchen semi-automatic faucet. Commonly used faucets are SUS304 stainless steel, cast iron, all-plastic, brass, and zinc alloy faucets.
A utensil for frying food, about 20 to 30 cm in diameter, with a low pan side and an iron bottom sloping. Manufacturers now generally switch to lighter aluminum as a manufacturing material.
Pans are great for roasting, roasting, steaming, grilling or sautéing seafood, meat and poultry dishes, cooking vegetables or healthy finger-friendly snacks. Easy to use, you can cook a variety of dishes in just a few minutes.
The 80s and 90s were a must-have for every household. There are various materials for washbasins, generally plastic, metal, wood and enamel are more common.
There are also washbasins used for other purposes such as washing feet and washing vegetables. The washbasin was small and movable earlier, but with the development of society, the washbasin was gradually replaced by a fixed washbasin.