China Shenzhen Perfect Precision Product Co., Ltd. company news

201 stainless steel is the most cost-effective stainless steel material, cheap, but easy to rust; 304 stainless steel is the most common and widely used stainless steel material, not easy to rust, good quality, and relatively high price; 316 stainless steel is an imported Material, used in some high-end equipment. 304 stainless steel is often used as a kind of nickel-nickel stainless steel. We often see that some tableware is made of 304 stainless steel because this stainless steel has alkali resistance, acid resistance and relatively good corrosion resistance. In order to make the tableware at home more hygienic, many people prefer to buy tableware made of this material. The price of 316 stainless steel will be more expensive. Compared with 304 stainless steel and 316 stainless steel, the most essential difference is the addition of a molybdenum element, which can greatly improve the corrosion resistance and acid resistance of appliances made of 616 materials. In this regard, 316 stainless steel is really good. Obviously, compared with 304 stainless steel, the furniture made of 316 stainless steel has better performance, its cost performance will be better, and its service life will be longer. Since utensils made of 316 stainless steel are really good, this material is generally used in more formal fields such as the food industry, watch industry, and medical equipment.

The density of die-cast aluminum alloy is 2.66×10kg/m, and the density of extruded aluminum alloy is 2.73×10kg/m. Aluminum alloy is the most widely used non-ferrous metal structural material in the industry. Aluminum alloy has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of the industrial economy, the demand for aluminum alloy welded structural parts is increasing day by day. Aluminum alloy standard In the international standard: GB/T3190-1996 chemical composition of 6061 aluminum alloy silicon: 0.30-0.7, iron: 0.50, copper: 0.10, manganese: 0.03, magnesium: 0.35-0.8, chromium: 0.03, zinc: 0.10, aluminum: Yu quantity. 6061 aluminum alloy is a high-quality aluminum alloy product produced by heat treatment and pre-stretching process.

When you think of material characteristics for parts, lightweight and strength come to mind. Naturally, so do aluminum and titanium. Both materials tick off other important boxes, such as excellent resistance to corrosion and tolerance for heat. Using 3D printing or CNC machining, these two metals have proven to be incredibly versatile for parts across a range of industries.   Aluminum and titanium are both light but for different reasons. Aluminum’s low specific gravity (2.7 g/cm3) means that it’s considerably lighter than counterparts such as steel, which is about three times as heavy. Although titanium is about two-thirds heavier than aluminum, its inherent strength means that you need less of it. In fact, you need a fraction of the amount of titanium to get the same physical strength you would get with aluminum. Titanium is used in aircraft jet engines, for example, and in spacecraft, too. Its strength and light weight reduce fuel costs. The big difference between your two choices for machining aluminum has to do with the amount of copper in the alloy. In a head-to-head comparison, if you need something with impressive strength that can tolerate a high-friction environment, 7075 makes the most sense. 6061 does better in welding applications, it’s easier to machine and costs less. The bottom line when machining aluminum: If low weight, high tolerance to heat, and high strength are key, 7075 is the way to go.

Anodizing is one of the most common finishing options, offering strong corrosion protection and enhancing the overall appearance of metal parts. Three types of aluminum anodizing are available from Protolabs:   Type I-Chromic Acid: Provides a whisper-thin but still durable coating. Commonly used for welded parts and assemblies and as a primer before painting. Like all anodized surfaces, it is non-conductive. Type II-Sulfuric Acid: Harder than Type I it offers an exceedingly durable finish. Usage examples include carabiner hooks, flashlight handles, motorcycle parts, and hydraulic valve bodies. Type III-Hard Anodize or Hardcoat: This is the thickest and hardest anodize available and has a wide range of applications for parts and products in automotive, aerospace, heavy equipment, marine industry, general manufacturing, and military/law enforcement.

CNC turning is a widespread technology for manufacturing cylindrical parts from various materials. Unlike CNC milling, CNC turning rotates the workpiece and introduces a stationary tool into the workpiece. Advanced CNC turning centers take this further by adding milling functionality to the machine to produce highly complex parts like those in the image below: This article will provide a top-level introduction to the CNC lathe machine and will describe typical naming conventions, how CNC turning works, the types of operations available, and the various components of a CNC turning machine. CNC turning is a subtractive manufacturing technology and refers to the process of removing material from a (typically) cylindrical stock piece of material — though CNC turning can also be performed on a wide range of stock shapes such as hex or square bars. The machine spins the workpiece while a tool moves to engage and remove material until the desired shape is achieved.  

With so many burrs, how to remove them? Choosing the right tools and techniques for deburring will get twice the result with half the effort. The following Xiaoqi will introduce several main deburring processes to you.   1. Manual deburring It refers to the process in which skilled workers use files, sandpaper, grinding heads and other tools to polish and remove burrs from workpieces. This method does not have very high technical requirements for workers and is suitable for products with small burrs and simple product structures, so it is also a commonly used deburring method. 2. Grinding and deburring Grinding and deburring is a method of removing burrs through vibration, sandblasting, rollers, etc., and it is also widely used at present. The problem with grinding and deburring is that sometimes the removal is not very clean, and subsequent manual processing or other methods of deburring may be required. This method is suitable for small products with large batches. 3. High-pressure water jet deburring Using water as the medium, use its instantaneous impact force to remove the burrs or flashes generated after processing, and at the same time achieve the purpose of cleaning. 4. Chemical deburring By using the principle of electrochemical reaction, the burrs of metal workpieces are automatically and selectively removed. This method is more commonly used for internal burrs that are difficult to remove, such as small burrs on workpieces such as valve bodies and pump bodies. 5. Thermal deburring The process is to fill some flammable gas into an equipment furnace, and then through the action of some media and conditions, the gas is instantly exploded, and the energy generated by the explosion is used to dissolve and remove the burrs. Thermal deburring is mainly used in some high-precision parts fields, such as automotive aerospace and other precision parts.

Electropolishing (Electropolishing) is suitable for mirror polishing of 304, 316, 316L and other stainless steel materials. It has high polishing brightness and long-lasting luster. It is a technical method. Process characteristics High polishing efficiency, good quality, and high gloss can be thrown within minutes. It can preferentially dissolve the dislocation of the deformation layer on the metal surface, and accumulate the equipotential structure of holes, thereby obtaining an equipotential surface, which greatly improves the corrosion resistance of stainless steel. Polishing requires devices such as voltage regulators, rectifiers, and electrolytic cells. usage The stock solution is used, the lead plate is used as the cathode (negative electrode), the workpiece is used as the anode (positive electrode), the temperature is 60-80 degrees, the current density is 15-50 ampere square decimeters, the voltage is about 10 volts, and the time is 5 minutes. Process flow: chemical degreasing→hot water washing→cold water washing→electrolytic polishing→hot water washing→cold water washing→passivation→cold water washing→hot water washing→hot pure water washing Note: Part of the process can be adjusted according to the actual situation.

Water cutting, also known as water jet, is a high-pressure water jet cutting technology, which is a machine that uses high-pressure water jet cutting. Under the control of the computer, the workpiece can be carved arbitrarily, and it is less affected by the texture of the material. Because of its low cost, easy operation, and high yield rate, waterjet cutting is becoming the mainstream cutting method in industrial cutting technology. 1. Working principle The ultra-high pressure water jet cutting machine passes ordinary water through an ultra-high pressure pressurizer to pressurize the water to 3000bar and then produces a water jet about 3 times the speed of sound through a water nozzle with a channel diameter of 0.3mm, which is controlled by a computer. It can easily cut soft materials with arbitrary graphics, such as paper, sponge, fiber, etc. If adding sand to increase its cutting force, it can cut almost any material. 2. Features: 1. There is no restriction on the cutting direction, and various special-shaped processing can be completed; 2. The lateral force generated by the water jet on the workpiece is extremely small, which can reduce the setting time and save the cost of using fixtures; 3. Waterjet processing will not produce thermal deformation, and no secondary processing is required, which can save time and manufacturing costs; 4. Waterjet processing has fast cutting speed, high efficiency and low processing cost. 3. Advantages: 1. Can easily cut stainless steel plate or hard marble, granite, etc., for those who are due to other The method is very ideal or the only processing method for materials that are difficult to cut, such as aramid fibers, titanium alloys and other composite materials. 2. It does not produce cracks when cutting, and it can cut materials with narrow gaps. Generally speaking, the incision of pure water cutting is about 0.1mm to 1.1mm, and the incision of sand cutting is about 0.8mm to 1.8mm. As the diameter of the inner hole of the sand nozzle expands, the incision becomes larger. 3. Can be cut in all directions, including various shapes, angles, or slopes; 4. There is no need for secondary processing such as edging, and it can also reduce flying dust during the cutting process and improve the working environment. 4. The form of water cutting and the composition of water cutting machine tools: The form of water cutting is divided into water quality, there are pure water cutting and abrasive cutting; from the pressure method, there are hydraulic pressure and mechanical pressure; from the structure of the machine tool, there are gantry structure and cantilever structure. A complete set of water-cutting equipment consists of an ultra-high pressure system, water jet cutting head device, water jet cutting platform, CNC controller and CAD/CAM cutting software, etc. 5. Comparison between water cutting and laser cutting: The investment in laser cutting equipment is relatively large. At present, it is mostly used for cutting thin steel plates and some non-metallic materials. The cutting speed is fast and the precision is high. The laser cutting of materials is not ideal, such as aluminum, copper and other non-ferrous metals, and alloys, especially for the cutting of thicker metal plates, the cutting surface is not ideal, or even impossible to cut. At present, people's research on high-power laser generators is trying to solve the cutting of thick steel plates, but the costs of equipment investment, maintenance and operation consumption are also considerable. Waterjet cutting has small investments, low operating costs, a wide range of cutting materials, high efficiency, and convenient operation and maintenance.

The EDM processing method has a certain history and is not the latest technology, but compared with forging and metallurgy, EDM is not old. EDM is to use sparks generated between electrodes and workpieces when electricity is applied ( Because the positive and negative electrodes are in direct contact, resulting in a short circuit), the instantaneous high temperature generated, removes the surface of the workpiece in contact with the electrode layer by layer, so that the material around the electrode is continuously reduced.   The EDM processing technology is usually suitable for the processing of parts with relatively high hardness and the material must have conductivity. The general EDM machine can only approach the workpiece again because the electrode has to be etched off one layer and then lowered. Electric sparks can also be generated, so usually, because of the high precision requirements, the EDM machines used are basically CNC EDM machine tools, which is the best processing method for EDM. The CNC EDM machine is mainly composed of a main engine, a pulse power supply, an automatic feed control system and a working medium circulation system, etc., involving the mechanical field, PLC control, cooling system, etc., regardless of any type of work, it involves strong professional knowledge. It is obviously different from ordinary equipment, which will be discussed in another article later. Let’s talk about the characteristics of EDM. The discharge speed set during EDM and the surface quality of the mold are the core factors that affect the machining accuracy and quality. The mold used for EDM (that is, the electrode) In EDM, it is generally divided into several levels, namely coarse, medium, and fine, which can be divided into fine discharge, coarse discharge, and medium discharge. Coarse EDM is realized by high-power, low-loss discharge method (except for the mold, the power settings of the equipment are different, and the electrode is relatively lossy during medium and fine EDM (the electrode is eroded when the part is etched), and at the same time itself will be consumed, this is like hitting the stick, although there are 10,000 kills, there are also 3,000 self-damages), but in general, during medium and fine EDM, the product margin is less, so the electrode loss It is also extremely small and can be compensated by controlling the processing size during discharge because the loss of discharge is fixed and unchanged. Of course, it can be ignored when the accuracy requirement is not high. The mutual loss of the electrodes is what we said above, but the EDM machine can be used for a long discharge pulse time, which can effectively reduce the electrode loss, but the EDM machine only uses long discharge pulse waves and high current discharge for rough machining, and the processing speed is fast. The electrode loss is small, but the accuracy cannot be improved. In the finishing discharge operation, a small current discharge must be used, and the discharge pulse time must be reduced. This not only increases the electrode loss, but also greatly reduces the processing speed, but the accuracy can be reduced. Do it. EDM carbon slag and slag removal are also very important. Carbon slag will be generated during EDM, and it must be carried out at the same time when generating carbon slag and removing carbon slag, and the two can be achieved under the condition of balance. For processing, in actual production, the purpose of removing carbon slag is usually achieved by sacrificing the processing speed, for example: during medium and fine EDM, use a higher voltage, or use a large rest pulse, etc. Another condition that affects the removal of carbon slag is the complexity of the shape of the processing molding surface, which is easy to make the chip removal path unblocked. This situation is relatively difficult to deal with. In this case, the requirements for folding electrodes are relatively high, because the electrodes are processed by CNC., so folding electrodes is a very important course content when training CNC programming in our school, and it is a must, and it is also a key assessment.

Most of the bent parts are made by processes and methods such as hanging bending, in-mold bending, flanging and pressing. The method of operation follows the same principle: the punch presses the workpiece into the lower die of the die. Therefore, the bending machine that performs the above process and method is called a press brake. In addition to press brakes, TRUMPF also offers swing arm bending machines. Hanging bend Air bending: The punch presses the workpiece into the die without pressing it against the die wall. During the downward movement of the punch, the edge of the workpiece bends upward and forms an angle. The deeper the punch presses the workpiece into the die, the smaller the angle. At this time, there is a gap between the punch and the die. Hanging bending is also known as a path-dependent process. Each angle requires a specific path. The machine control system simultaneously calculates the path and the corresponding punching force. Path and punching force depend on tooling, material and product properties (angle, length). In-mould bending In-die bending: The punch presses the workpiece completely into the die, so there is no gap between the die, workpiece and punch. This process is called clamping. Punch and die must fit each other precisely. Therefore, each angle and shape requires a corresponding mold assembly. Once the workpiece is fully pressed in, the punch cannot move further down. The machine tool control system continues to increase the stamping force until it reaches the specified value. The pressure applied to the workpiece thus rises, taking on the contours of the punch and die. The included angle is gradually stabilized under high pressure, almost completely eliminating the problem of spring back. Folding and pressing Sheet edges are usually fully bent (eg box edges) and then folded parallel to each other. The finished part as a whole is therefore more stable or forms an edge protection. Other parts usually need to be hooked into the flange subsequently. Folding and pressing are done in two steps: first, the operator pre-folds the 30° angle, then reinserts the workpiece and presses the angle. If there is a gap between the edges, it is called a hem. During pressing, the flanges are completely pressed against each other. Hemming is path-dependent, but pressing is force-dependent. Flap bending The bending arm built into the machine consists of a C-shaped profile on which the lower and upper bending tools are mounted. During bending, the C-profile moves up or down, or makes a small elliptical movement, i.e. flips. The semi-automatic operation of the swing arm bending machine is famous for its speed and flexibility, and it is not inferior to the production of small batches. In addition, flap bending technology enables efficient bending of various radius sizes on a single component using the same tool.