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Metal stamping parts are widely used in industries such as automotive, electronics, and home appliances, and stamping molds are key equipment for the production of metal stamping parts. This article will introduce a novel structural design scheme for the stamping molds of metal stamping parts.       The scheme adopts a modular design concept, decomposing complex mold structures into multiple simple modules, thereby enhancing the manufacturing precision and production efficiency of the molds. Simultaneously, the scheme incorporates advanced CNC machining technology, significantly improving the machining precision of mold components.       Specifically, the plan includes improvements in the following aspects:       Adopting a modular design: The entire mold is divided into multiple modules, with each module responsible for a specific process such as punching, bending, etc. This approach reduces the complexity of the mold, thereby lowering manufacturing difficulty and costs.       Employing high-precision CNC machining technology: Precise machining of mold components is carried out using CNC machines to ensure that the dimensions and shape of each component meet the requirements. This method can enhance the precision and stability of the mold, thereby extending its service life.       Utilizing high-strength materials: To ensure that the mold does not deform or damage during use, this solution employs high-strength materials for the production of mold components. These materials exhibit excellent strength, hardness, and wear resistance, meeting the requirements of high-speed stamping.       In summary, the plan achieves automation and efficiency in the manufacturing process by improving the structure of the stamping die for metal stamping parts, thereby enhancing product quality and production efficiency.

With technological innovation and people's increasing awareness of the sheet metal industry, numerous technological advancements have emerged in the welding aspect of sheet metal processing. However, no matter how advanced the new technologies are, welding workshops or sections in sheet metal processing factories will encounter some bottleneck issues, even advanced factories are not immune.       Today, our editor will share with you the processing methods in projection welding technology during sheet metal processing. Projection welding is a resistance welding method in which one or more protruding points are pre-processed on the joint surface of one weldment, allowing it to contact and press against the surface of another weldment. When electricity is applied and heated, the protruding points are crushed, forming weld points at these contact points. Compared to spot welding, projection welding has the following characteristics:       (1) The bump positions are accurate and the dimensions are consistent, ensuring stable diameter and penetration of the solder joints, resulting in more uniform performance of the solder joints       (2) The welding current is concentrated on the bump, with small shunting and high current density, allowing for the formation of a smaller nugget with a smaller welding current       (3) Multiple welding points can be welded simultaneously within one welding cycle       (4) Oil stains, rust, oxide scale, plating, and coating on the surface of the weldment have a relatively small impact on the quality of the welding spot       (5) Under the condition of the same welding current, the thickness of the weldable component is greater than that of spot welding       (6) Arranging bumps on one solder component can significantly reduce the indentation on the exposed surface of the other solder component       Due to its multiple advantages mentioned above, projection welding has gained widespread application. However, it has its disadvantages: it requires an additional process for punching the projection welding; the electrodes are relatively complex; and since multiple welding points need to be welded at once, a high-power welding machine with high electrode pressure and high mechanical precision is required.

Stretch molding is a commonly used plastic processing technique. It involves heating and softening thermoplastic materials, and then utilizing the stretching action of the mold to shape them into products of the desired form. However, in practical production, there may be instances where the products produced by stretch molding vary in size. This inconsistency can be attributed to several main reasons:       Firstly, unreasonable mold design may be one of the main reasons for inconsistent product sizes. The mold design should take into account factors such as material shrinkage rate and stretching ratio. If the design is unreasonable, it will lead to inaccurate product dimensions.       Secondly, the properties of the material can also affect the size of the product. Different plastic materials have varying coefficients of thermal expansion and contraction. If the chosen material does not match the mold design, it can lead to inconsistent product dimensions.       In addition, the technical proficiency and operational methods of operators can also affect product dimensions. Operators should be familiar with the use of molds and master appropriate operational techniques to ensure the consistency of product dimensions.       Lastly, the quality and maintenance of equipment also impact product dimensions. The precision and stability of the equipment are crucial for controlling product dimensions. If there are issues with the equipment or improper maintenance, it can lead to inconsistent product dimensions.       To address the issue of inconsistent product sizes, the following measures can be taken: optimizing mold design to ensure compatibility between the mold and the material; strengthening operator training to enhance their technical skills; and regularly inspecting and maintaining equipment to ensure its normal operation. By implementing these measures, the dimensional consistency of products can be effectively improved, thereby enhancing production efficiency and product quality.

For precision components, the manufacturing process is highly rigorous, involving steps such as tool feed and tool withdrawal. There are specific requirements for dimensions and precision, such as within a certain range of ±1mm. If the dimensions are off by too much, the product becomes a waste, necessitating reprocessing, which is both time-consuming and labor-intensive. Sometimes, it may even result in the scrapping of the entire processing material, leading to increased costs. Furthermore, the component cannot be used. So, what standards and requirements must be adhered to in precision component manufacturing?   Get it at a glance! Requirements and standards for precision part processing   Precision part processing primarily involves dimensional requirements. For instance, the diameter of a cylinder is subject to strict specifications, and only parts with a positive and negative error within the prescribed range are considered qualified. Otherwise, they are considered unqualified. There are also specific and strict requirements for length, width, and height, with corresponding error specifications. For example, in the case of an embedded cylinder (taking the simplest and most basic component as an example), if the diameter is too large and exceeds the allowable error range, it may not be inserted properly. If the actual diameter is too small and falls below the allowable negative error limit, it may be inserted too loosely, resulting in insecurity. These are all unqualified products. Similarly, if the length of the cylinder is too long or too short and exceeds the allowable error range, it is also considered unqualified and must be discarded or reprocessed, which inevitably leads to increased costs.   The primary requirement for precision component processing is actually the issue of dimensions. It is imperative to strictly follow the additional drawings during processing. The actual dimensions of the processed components will inevitably deviate from the theoretical dimensions on the drawings. However, as long as the processing dimensions are within the allowable error range, the components are considered qualified. Therefore, the requirement for precision component processing is to strictly adhere to the theoretical dimensions during processing.   Secondly, we have advanced precision parts processing equipment and testing equipment. The advanced processing equipment makes the processing of precision parts simpler, with higher precision and better results. The testing equipment can detect parts that do not meet the requirements, ensuring that all products sent to customers truly meet the standards.

In recent years, China's mold production and sales have continued to climb, with private enterprises emerging continuously. The entry of renowned foreign enterprises and capital has further accelerated the rapid development of the mold industry, making China a veritable mold production giant. However, looking at the supply and demand situation of molds, although China has achieved complete self-sufficiency in medium and low-end molds, the self-sufficiency rate of high-tech molds, primarily represented by large, precise, efficient, and high-performance molds, remains relatively low, at around 60%. A significant portion still relies on imports. Therefore, enhancing the overall technical level of Chinese mold enterprises, improving their core competitiveness, and promoting the optimization of the mold industry structure remain urgent tasks for China's mold industry.   Stamping molds mainly include multi-station and multi-function stamping molds, automotive panel molds, and fine blanking molds. Here, we will only discuss the current status and development of precision multi-station and multi-function stamping molds.   High-speed precision stamping technology involves many fields such as machinery, electronics, materials, optics, computers, precision inspection, information networks, and management technology, making it a multidisciplinary systems engineering. The current status of multi-station and multi-function stamping dies is advanced. The representatives of multi-station and multi-function stamping dies mainly include precision multi-station progressive dies, precision multi-station stamping transfer dies, and precision multi-function stamping dies. High-speed precision stamping technology involves many fields such as machinery, electronics, materials, optics, computers, precision inspection, information networks, and management technology, making it a multidisciplinary systems engineering.

In order to achieve high surface hardness and wear resistance, many molds and stamping die components undergo surface heat treatment, such as surface nitriding. People are very concerned about the surface hardness and depth of the hardened layer of such molds. When testing the hardness of stamping die steel that has undergone surface heat treatment, there is an incorrect practice that deserves correction. This is the improper use of the Leeb hardness tester in such situations. This is determined by the principle of the Leeb hardness tester. The three commonly used hardness testers, Brinell, Rockwell, and Vickers, all adopt the static testing principle, which involves slowly pressing a hard indenter into the surface of the specimen and then measuring the indentation depth or size to determine the hardness value. However, the Leeb hardness tester adopts the dynamic testing principle.   It involves impacting a sphere of specified mass onto the surface of the specimen at a predetermined speed, and measuring the difference between its initial speed and its speed after rebound, in order to determine the hardness value of the specimen. To understand this, one only needs to look at the thickness of the standard hardness block of the Leeb hardness tester. It is evident that the hardness value measured by it is neither the hardness of the nitrided layer nor the hardness of the base material, but rather the result of the combined effect of the two. Due to the different thicknesses of the surface layers of the stamped parts, different results will inevitably be obtained.

In precision part processing, metal processing accounts for a significant portion.     Regarding the processing performance of precision hardware components, you must be aware of these six points!   Casting properties: Refers to the process properties of metals or alloys that determine their suitability for casting, mainly including flowability, the ability to fill the mold; shrinkage, the ability of the casting to contract in volume during solidification; and segregation, referring to chemical composition inhomogeneity.   Welding performance: refers to the characteristic of metal materials that can be welded together by heating or heating and pressurizing welding methods, with the joint meeting the purpose of use.   Head forging performance: refers to the ability of metal materials to withstand head forging without cracking.   Cold bending performance: Refers to the ability of metallic materials to withstand bending without cracking at room temperature. The degree of bending is generally expressed as the ratio of the bending angle α (outer angle) or the bending center diameter d to the material thickness a. The larger a or the smaller the ratio d/a, the better the cold bending performance of the material.   Stamping performance: The ability of metallic materials to withstand stamping deformation without cracking. Stamping at room temperature is called cold stamping. The inspection method is conducted using the cupping test.   Forging performance: The ability of a metallic material to undergo plastic deformation without fracturing during forging processes.

We know that shaft components are one of the most commonly used parts in machines and also one of the most important ones, as they are related to the supporting function of transmission components and the transmission of torque. So how are shaft components machined? Let's introduce it to you:   Mechanical processing of shaft-type parts - Shaft 1   First, we need to understand the technical requirements and processing requirements for shaft-type parts. What are the general technical requirements for shaft-type parts? Let's take a closer look:   1. Diameter accuracy, geometric shape accuracy   On the shaft, it is crucial to ensure the accuracy of the supporting journal and the mating journal. Their diameter accuracy should be within the IT5-IT9 range, while their shape accuracy should be controlled within the diameter tolerance and should meet higher requirements than the diameter accuracy.   2. Mutual positional accuracy   If the shaft has ordinary precision, its radial circular runout, when it is fitted with a bearing journal, is generally considered to be 0.01-0.03mm. For high-precision shafts, it is 0.001-0.005mm. If there are special requirements, they should be clearly stated.   3. Surface roughness   Due to factors such as the precision level and operating speed of the machine, the requirements for surface roughness of shaft components vary. The surface roughness of the supporting shaft neck ranges from 0.16 to 0.63 micrometers, while that of the mating shaft neck ranges from 0.63 to 2.5 micrometers.   4. Material, blank, and heat treatment of the main shaft   In shaft components, the commonly used material is 45 steel, which undergoes processes such as normalizing, annealing, tempering, and quenching to achieve certain levels of strength, hardness, wear resistance, and toughness.   For shaft components with relatively high rotational speeds, alloy structural steel can be chosen, as it will enhance wear resistance and fatigue resistance after heat treatment. The blanks for main shafts are generally forged pieces and round steel, which can reduce the amount of cutting and machining and improve the mechanical properties of the material.

Box-type parts are considered typical among mechanical components. Today, we will use box-type parts as a representative to analyze the machining process of components. We know that components such as gear transmission box bodies, gearbox bodies, and lathe headstock bodies are all basic parts of machines. They maintain the correct mutual positions of shafts, bearings, sleeves, gears, and other components within the machine parts, and coordinate their movements according to the pre-designed transmission relationship, forming a unified whole.   Analysis of the machining process for the long-axis core of the part   The box body requires processing of many surfaces, and the processing requirements for each surface are different. Some surfaces have high precision requirements, such as the main shaft hole. Therefore, the processing precision of these surfaces in the box body becomes a key issue in the process. In view of this, the following points should be noted during part processing:   1. The rough machining and finishing stages should be separated   As we mentioned above, there are many surfaces on the box body that require processing, and the precision requirements vary. Therefore, during operation, rough and fine machining should be separated, and rough machining should not be followed immediately by fine machining, as this can easily lead to deformation of the box body, ultimately affecting the precision.   2. The processing sequence should be from surface to hole   Initially processing the flat surface not only removes unevenness and surface sand inclusions on the blank surface, but more importantly, it facilitates marking and alignment when machining holes distributed on the flat surface. Furthermore, when the boring tool starts boring the hole, it will not generate impact vibration or damage the tool due to unevenness on the end face. Therefore, it is generally best to process the flat surface first.   3. Arrange appropriate heat treatment processes   The casting box has a complex structure and uneven wall thickness, which can lead to inconsistent cooling rates during casting, easily generating internal stress. Additionally, its surface is relatively hard. Therefore, after casting, it is necessary to arrange sandblasting and tempering personnel reasonably.   4. Decision on centralized or decentralized processes   Separating the rough and finish machining stages of the box body conforms to the principle of process decentralization. However, in medium and small-scale production, in order to reduce the number of machine tools and fixtures used, as well as the number of handling and installation times of the box body, the rough and finish machining stages can be relatively centralized and carried out on the same machine tool as much as possible.

Continuous stamping and drawing die manufacturing is an important mold manufacturing technology, widely used in industries such as automotive, electronics, and home appliances. This technology processes metal sheets into parts of desired shapes through continuous stamping and drawing.       The process of manufacturing continuous stamping and drawing dies encompasses multiple steps, including die design, material selection, and processing techniques. Initially, based on product requirements, an appropriate die structure is designed, encompassing the shape, dimensions, and hole locations of the die. Subsequently, suitable materials are chosen, typically high-hardness and high-strength alloy steel, to ensure the die's lifespan and processing quality. Following this, the appropriate processing techniques are determined based on the characteristics of the die structure and materials, including parameters such as stamping force, stamping speed, and stamping cycles.       In the manufacturing process of continuous stamping and drawing dies, the following points should be noted. Firstly, the design of the die should be reasonable, able to meet the requirements of the product, and easy to process and maintain. Secondly, the material of the die should be appropriately selected, capable of withstanding high-strength stamping and drawing forces. Thirdly, the processing technology should be precisely controlled to ensure the product's dimensions and surface quality. Lastly, the maintenance and care of the die are also very important. Regular cleaning and lubrication, timely repair of damaged parts, can extend the service life of the die.       In summary, the manufacturing of continuous stamping and drawing dies is a technically complex and demanding process, requiring high standards in die design, material selection, and processing techniques. Only through a scientific and rational manufacturing process can high-quality molds be produced to meet the production needs of various industries.