KOVAR parts are commonly used as metal casing materials in the electronic packaging industry. Because they have a linear expansion coefficient close to that of molybdenum group glass, and can produce less sealing stress during the sealing (melting) process with molybdenum group glass, so To obtain good air-tightness, in order to make the metal tube and shell to achieve air-tight sealing, in the entire sealing process, the annealing process undoubtedly plays an important role as a link between the previous and the next. The internal stress generated during KOVAR machining also prepares the material structure for the implementation of the subsequent process-the sealing process of the metal parts. The main purpose of annealing Kovar shell before sealing is to: (1) Eliminate machining stress. When Kovar undergoes plastic machining deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stre...
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According to the working characteristics of medical parts, it is required to be resistant to a certain temperature during disinfection (usually high-temperature steam disinfection), not to be rusty, high in strength, hardness (scalpel), and not easy to deform. Generally, stainless steel is selected, and stainless steel has The materials with the above characteristics are martensitic stainless steel, such as 3Cr13 and 4Cr13 martensitic stainless steel and 9Cr18 machining stainless steel spring , etc., and martensitic stainless steel is the cheapest stainless steel, which can meet the requirements of medical equipment. The heat treatment process is basically quenching + low temperature tempering. 3Cr13 steel quenching temperature 1000~1050°, oil quenching, tempering temperature 150~350° 4Cr13 steel quenching temperature 1050~1100°, oil quenching, tempering temperature 150~350° When tempering these two kinds of steel, try to choose a higher temperature, such as 300 °, for the need of hi...
90% of medical machining parts and equipment implants are made of Ti6Al-4V titanium alloy, which is derived from light weight, high strength and high biocompatibility. Titanium alloy 6AL-4V has become a commonly used material for medical implant equipment. Titanium alloy 6AL-4V is usually used in the production of hip joints, bone screws, knee joints, bone plates, dental implants, and spine connection components. Titanium alloy has the characteristics of work hardening, the cutting angle is large in the processing process, and the chips produced are thin. A relatively small contact area is formed on the surface. 1. Titanium alloy materials that are difficult to process for medical parts The high speed laser cutting force during the machining process, combined with the frictional force during chip flow, will comprehensively lead to excessive local cutting heat of the tool. The poor thermal conductivity of titanium alloys prevents the cutting heat from being conducted quickly. As a r...
Kovar® is a vacuum-melted iron-nickel-cobalt low-expansion alloy. The chemical composition content is controlled in a very narrow range to ensure accurate and balanced thermal expansion performance. At the same time, strict quality control during the manufacturing process of KOVAR machining parts also ensures balance Its physical and mechanical properties are more suitable for deep drawing, stamping and various cutting processes. Material use Kovar® is used for vacuum sealing of hard glass and ceramics, and is widely used in electron tubes, microwave tubes, transistors and diodes. On integrated circuits, it is used for flat integrated circuits and dual in-line packages. Seal preparation All parts made by Kovar® should be degassed and annealed in a wet hydrogen atmosphere. Hydrogen is injected into water at room temperature and gets wet through blisters. Care must be taken to prevent surface carbonization. The heat treatment furnace must have a cooling chamber that provides the same a...
Metal parts processing density tester KW-300A, metal parts , refers to the collective name of various specifications and shapes of metal blocks, metal rods, metal tubes, etc. made of metal materials. In the production process, density is very important. One of the physical properties is that manufacturers need to strictly control the density of products. KW-300A is a precision instrument composed of electronic machining balance, density software, density accessories, etc. It can quickly and conveniently measure the density of solids of various shapes, equipped with professional measuring accessories and transparent sinks. It is easy to carry, simple to operate, powerful, high precision and repeatable. KW-300A parameters and features: Weighing range: 0.005g~ 300g Density/specific gravity accuracy: 0.001 g/cm3 Test time is about 5 seconds; Display value density, volume temperature compensation; Solution temperature can be set to 0~100℃/auto; Compensation solution The compensation soluti...
CNC lathe parts are processed with a variety of raw materials. Among them, aluminum parts are one of the more processed parts. When using CNC machine tools to process aluminum machining parts, you want to make the processing models and specifications more stable. Such areas must It is necessary to pay attention to the refrigeration problems of raw materials and the deformation of aluminum die castings after refrigeration. Such things are generally inevitable. At this time, it is necessary to pay attention to the application of diesel engine refrigerant as much as possible. Consider the deformation of raw materials. Processing technology Unscientific processing technology can easily lead to deviations in the model specifications of aluminum die castings . To ensure the basic processing technology (such as cutting CNC machine tool processing "first rough and then fine, face first and then hole, first many and then spicy small surface" or welding fixture application "red...
The production process of KOVAR parts processing has a great relationship with the process, including the process environment elements and the optimization configuration elements of the process route. The process route process needs to be formulated by an experienced person. The following is a brief explanation of the process process. The formulation of the process route process: First, the geometric structure of the parts, the core parts of the accuracy index, the accuracy requirements, material characteristics, heat treatment requirements and performance requirements, etc. should be carefully analyzed, and then the blanks of the parts should be reasonably selected, the cnc machining china equipment should be used reasonably, and reasonable measures should be taken. Many process links such as stress process measures are reasonably configured. In the production organization process, the process is strictly implemented. During the process, strict inspection is performed. For general p...
In the actual application of precision parts processing, the higher the precision and the more refined the better the processing level and quality. At the same time, these products are also more popular with consumers. Generally speaking, they have incomparable advantages and characteristics in CNC machining . Precision parts processing will choose processing methods according to customer requirements, or make decisions based on products, and the same is true for precision parts processing. The machining process of precision parts includes cnc turning , milling, planing, grinding, clamp, stamping, casting, etc. Stamping: Stamping uses pre-made molds and punches for cold stamping, mainly for sheet metal processing, that is, most of the processed materials are plates, and the processing efficiency is relatively high and suitable for mass production The precision hardware processing process is divided into engineering molds and continuous molds. Engineering plastic molds are also calle...
Repetitive production of parts processed by CNC lathes: the use of CNC grinders accounts for a relatively high proportion of process preparation man-hours, such as process analysis preparation, programming, part adjustment and test cutting, etc. The sum of these comprehensive man-hours is often a single part The processing time is dozens to hundreds of times, but the work content of these CNC turning can be saved and used repeatedly. Therefore, when a part is successfully trial-produced on the CNC grinder and then repeatedly put into production, the production cycle is greatly reduced, the cost is less, and more can be obtained. Good economic benefits. It is required to focus on ensuring the quality of the key parts in small and medium batches that can be produced efficiently: CNC grinding machines can achieve high-precision, high-quality, and high-efficiency grinding machining under computer control. Compared with the special grinding machine, it can save a lot of special process equ...
In fact, what a workpiece can see is not only the strength of a manufacturer, but also its handling of some details. For CNC lathe parts, if the cnc manufacturer does not handle it well, then this machining part is not acceptable. What should the manufacturer pay attention to when cnc machining ? 1. The burr on the cost surface can be said to be easily overlooked by many manufacturers. Many people say what this part looks like when it comes out, and what it looks like when the finished product is packaged. In fact, for a part, the CNC lathe 5 axis cnc machining parts are completed by equipment, then the cloak will be produced during injection molding, and this burr is also produced at this time. If it is not trimmed in time, or the The parts are obsolete. Otherwise, it will affect other links during use. 2. Accuracy of parts. For CNC lathe machining parts, its accuracy is very strict. It can only be used if it meets the required accuracy. The accuracy of the part is judged mainly by ...
In the precision machining of metal parts, hardware processing accounts for a large part. This time I will share with you what are the technological properties of hardware, I hope it will be helpful to everyone! Casting performance: refers to some process properties of whether a metal or alloy is suitable for casting, including flow properties, ability to fill the mold; shrinkage, the ability to shrink the volume when the investment casting solidifies; segregation refers to the unevenness of chemical composition. Welding performance: refers to the characteristics of metal materials that can meet the purpose of use by welding two or more metal materials together by heating or heating and pressure welding. Top gas section performance: refers to the performance that laser cutting materials can bear upsetting without breaking. Cold bending performance: refers to the performance of metal materials that can withstand bending without breaking at room t...
KOVAR parts are precision processed by CNC numerical control machine tools and used for electronic industry equipment; precision parts processing, swiss machining , CNC precision parts processing. (1) Eliminate machining stress. When Kovar undergoes plastic deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stress, so that the Kovar machining material structure is in an unstable state. Under this condition, it can be maintained for a long time without significant changes. Once it is heated, a series of changes in structure and properties will occur, and the material structure tends to a stable state. This change in structure and properties, especially changes in the structure of the structure, is reflected on the sealing surface. The tensile stress on the molybdenum group glass during high temperature sealing may cause the glass to produce small cracks and leak air. (2) Eliminate work har...
The basic forms of failure of metal parts. Generally, the failure forms of mechanical parts are classified according to the external morphological characteristics of the failed parts, which generally include: wear failure, fracture failure, corrosion failure and distortion failure. In production practice, the most important failure mode is The wear failure of the working surface of the part, and the most dangerous form of failure is the instantaneous crack and fracture, collectively referred to as fracture failure. Basic forms of failure of metal cnc machining parts Generally, the failure modes of mechanical parts are classified according to the external morphological characteristics of the failed parts, which generally include: wear failure, fracture failure, corrosion failure and distortion failure. In production practice, the most important failure mode It is the wear failure of the working surface of the part, and the most dangerous form of failure is instantaneous cracks and fr...