News – Page 21 – CNC Machining & Turning, Milling, Metal parts

Introduction of Hardware Stamping Parts

Hardware: Steel or some non-ferrous metals processed parts, processing means: cold/hot stamping, extrusion, rolling, welding, cutting and so on, including some other processes, a relatively broad definition.

Stamping parts: Hardware processing in the most used, refers to at room temperature, steel/non-ferrous metals and other sheet metal dies, by the press to provide the processing pressure required to form a specified shape.

Including some electronic devices, automotive accessories, decorative materials and so on. We usually say stamping parts refer to cold stamping parts. For example, a piece of iron plate, if you want to turn it into a fast-food plate, you must first design a set of dies. The working surface of the dies is the shape of the plate. Pressing the iron plate with the dies will become the plate you want. This is cold stamping, that is, stamping the hardware materials directly with the dies.

Electroplating Technology and Testing Standard of Hardware

I wonder if you are familiar with the plating process and quality testing standards of hardware. Today, Xiaobian and you all come to learn about it.

The traditional plating process of metal products can be roughly described by the following processes:

Mounting degreasing, washing rust removal, washing activation, washing electroplating washing drying inspection packaging.

New Technology of Replacing Electroplating

Common plating processes include galvanizing, copper plating, nickel plating, gold plating, silver plating, tin plating, chromium plating, rhodium plating, palladium plating and alloy plating. There are various kinds of plating, either single-layer plating or multi-layer plating: single metal plating (as mentioned above), alloy plating, composite plating and electroless plating. Vacuum plating and ion sputtering are also called electroplating. Such as aluminium oxidation, blackening/bluing, chemical polishing, electrochemical polishing, passivation and so on, also fall into the category of electroplating.

New Technology of Replacing Electroplating

The inspection of electroplated hardware should be based on appearance, corrosion resistance, temperature resistance, adhesion force, size and other aspects. If one or more of the products are not up to standard, it shows that there are slight or serious defects in this product. According to the objective data, many products produced by electroplating process have slight defects. The operation process is mainly affected by temperature, current, plating solution and other factors. The quality of some hardware products is not very optimistic.

Trend of Sheet Metal Processing Technology

With the continuous progress of technology, China’s sheet metal processing industry has undergone tremendous changes, but also changed the face of society. Now the development of sheet metal processing industry makes more and more furniture of plastic, stainless steel and other materials, and people are more willing to buy such daily necessities.

Sheet metal processing is actually a comprehensive cold processing technology for sheet metal, including shearing, punching, cutting, composite, bending, welding, riveting, splicing, forming and so on. Its main material is sheet metal, through shearing, bending edge, bending forming, welding, riveting and other processes to produce raw materials into a product, which we need to use in daily life, such as iron barrels, oil barrels, cabinets, chassis and so on.

In sheet metal processing technology, besides numerical control technology, there are stamping and so on. Stamping process is an important part of sheet metal processing. CNC punch can replace the processing capacity of the past three punches, not only ensure the accuracy of products, but also greatly improve the efficiency of processing, and also save the cost of equipment for enterprises and reduce production costs.

These are some changes in sheet metal processing technology, from the traditional processing technology to the direction of numerical control processing technology, I believe that in the near future, our sheet metal processing technology will be on a higher level.

Hardware inspection

Rockwell hardness tester is used for hardness testing of metal stamping parts. Small stamping parts with complex shapes can be used to test the plane is very small and can not be tested on ordinary desktop Rockwell hardness tester.

Stamping process includes blanking, bending, drawing, forming, finishing and other processes. Stamping materials are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plate, alloy steel plate, spring steel plate, galvanized plate, tin plate, stainless steel plate, copper and copper alloy plate, aluminum and aluminum alloy plate, etc.

PHP series portable surface Rockwell hardness tester is very suitable for testing the hardness of these stamping parts. Alloy stamping parts are the most commonly used parts in the field of metal processing and mechanical manufacturing. Stamping parts processing is a method of separating or forming metal strips by means of dies. It has a wide range of applications.

The main purpose of hardness testing of stamping materials is to determine whether the annealing degree of the purchased metal sheet is suitable for the subsequent stamping process. Different kinds of stamping process require different hardness levels of sheet metal. Aluminum alloy sheet used for stamping can be tested by Wechsler hardness tester. When the thickness of material is more than 13mm, it can be changed to Barkholder hardness tester. Pure aluminium or low hardness aluminium alloy sheet should be used Barkholder hardness tester.

In the stamping industry, stamping is sometimes called sheet metal forming, but it is slightly different. The so-called sheet metal forming refers to the forming method of using sheet metal, thin-walled tube, thin section as raw materials for plastic processing, which is collectively called sheet metal forming. At this time, the deformation in the direction of thick plate is generally not taken into account.

Matters needing attention in the selection of gaskets

1. Requirements for temperature and chemical resistance

Make sure that the gaskets you ordered can withstand operating temperature and medium resistance. Check the chemical compatibility of metal and filler to sealing medium. According to general practice, the metal used to make metal wound gaskets and metal coated gaskets should be similar to flanged materials.

The compressibility of flexible graphite makes it a good filler for making metal gaskets. Flexible graphite can not be used as a strong oxidant such as nitric acid and sulphuric acid, but it can be used at 450 C. PTFE fillers can provide excellent chemical resistance below 260 degree C. According to ASME B16.20, when PTFE is used as filling material, inner ring should be used to prevent radial instability of winding part.

2, work pressure

Working pressure has a direct impact on the design and selection of metal gaskets. Higher pressure may cause gaskets to blow out, and low pressure applications require gaskets designed to seal under low bolt loads.

Forging characteristics

From the point of view of safety, technology and labor protection, the characteristics of forging workshop are as follows:

(1) Forging production is carried out in the state of hot metal (such as low carbon steel forging temperature range between 750-1250 C), due to a large number of manual work, a little carelessness may cause burns.

(2) Heating furnaces and hot ingots, blanks and forgings in forging workshops continuously emit a large amount of radiation heat (forgings still have a fairly high temperature at the end of forging). Workers are often exposed to heat radiation.

(3) The smoke and dust produced by the heating furnace in the forging workshop are discharged into the air of the workshop during the combustion process, which not only affects the working environment, but also reduces the visibility of the workshop (especially for the heating furnace burning solid fuel), and may also cause industrial accidents.

(4) The equipment used in forging production, such as air hammer, steam hammer, friction press, etc., emits impact force when working; when the equipment is subjected to such impact load, it is prone to sudden damage (such as the sudden breaking of the piston rod of the forging hammer), resulting in serious injury accidents. Press (such as hydraulic press, crank hot die forging press, flat forging machine, precision press), shear machine and so on, although the impact is small, but the sudden damage of equipment also occurs from time to time. Operators often fail to take precautions and may cause accidents at work.

(5) Forging equipment plays a great role in the work, such as crank press, stretch forging press and hydraulic press. Although their working conditions are relatively stable, the power of their working parts is very large (for example, 12 000 t forging hydraulic press has been manufactured and used in our country). It is a common 100-150 t pressure machine, which emits tremendous force. If there are errors in the installation and adjustment of the die or slightly incorrect operation, most of the force is not applied to the work, but to the parts of the die, tool or equipment itself, which may cause damage to the machine parts and other serious settings. Prepare for or cause personal accidents.

(6) There are many kinds of forgers’tools and auxiliary tools, especially hand forging and free forging tools, clamps and so on. These tools are put together in the workplace. In the work, tools change very frequently, and storage is often messy, which will inevitably increase the difficulty of checking these tools. When a tool is needed in forging and can not be found quickly, sometimes similar tools will be used, which often results in accidents at work.

(7) Because of the noise and vibration of forging workshop equipment in operation, the working place is noisy and harsh. It affects people’s hearing and nervous system and distracts their attention, thus increasing the possibility of accidents.

Attribute Classification of CNC Tools

According to the cutter structure, it can be divided into:

Integral type: The cutting tool is made of one blank, and it is not separated.

Welding type: using welding method to connect, dividing tool head and tool rod;

Machine clamp type: Machine clamp type can be divided into two types: non-indexable and indexable; usually CNC tools are machine clamp type!

Special type: such as composite cutter, shock absorber cutter, etc.

According to the materials used to make cutting tools, they can be divided into:

High speed steel cutting tools;

Cemented carbide cutting tools;

Diamond cutting tools;

Other material cutters, such as cubic boron nitride cutters, ceramic cutters, etc.

Cutting technology can be divided into

Turning tools, including cylindrical, internal hole, thread, cutting, grooving tools and other;

Drilling tools, including drill bits, reamers, taps, etc.

Boring tools;

Milling tools, etc.

What are the problems in the dyeing process of aluminium alloy

In the process of aluminium alloy surface dyeing, there are often many problems, such as not dyeing or chromatic aberration, and so on. And a problem is always caused by more than one reason. If we want to list them one by one, it is estimated that a book may not be comprehensive. We can take a look at some of the problems and general solutions.

The first is the cause of color difference and shade and the general solution.

1. Dyes are not dissolved properly, or insoluble dyes float, which is easy to produce chromatic aberration. The solution is to improve dye dissolution. It is suggested to select better dye reagents, such as Hsjt Red 120 and other dyeing reagents commonly used in the market.

2. The thickness of oxide film is uneven. The possible reason is the uneven temperature and concentration of the anodic oxidation tank liquid. The solution is to mix the tank liquid with compressed air to solve this kind of problem.

3. The dyeing speed is too fast. The bottom of the workpiece enters the dyeing solution first and leaves the dyeing solution finally, so the bottom is the easiest to dye deeply. The solution is to dilute the dyes and prolong the dyeing time properly. The dyeing speed can also be controlled by ht429 dyeing inhibitor.

4. Dyes are not dissolved properly, or insoluble dyes float, which is easy to produce chromatic aberration. The solution is to improve dye dissolution.

Then, we can look at the reasons and solutions for the staining of aluminium alloy. After all, the colour is not dyed, let alone other things.

1. The oxidation temperature of aluminium profile is too low, resulting in dense skin film. The solution is to increase the oxidation temperature appropriately.

2. The conductivity of aluminium profile is poor. This is due to poor contact between positive copper rod or negative cathode lead plate. The solution should pay attention to cleaning positive copper rod and negative lead plate, so as to ensure good conductivity.

3. The thickness of positive oxide film is insufficient. The solution checks whether the anodic oxidation process is correct or not, to see whether the temperature, voltage, conductivity and other factors are stable. If there are abnormalities, the specifications should be adjusted according to the corresponding methods. No abnormalities can be found, and the oxidation time can be prolonged appropriately to ensure that the film thickness reaches the standard.

4. After oxidation, the workpiece is placed in the tank for too long. It is suggested that dyeing should be done in time. If this happens, the workpiece can be dyed in positive oxidation tank or nitric acid neutralization tank after proper activation treatment. The effect will be better.

In fact, there are more problems in aluminium alloy dyeing. There are also spots, streams, hair and flowers, and the reasons for their formation are various. The author will elaborate one by one next time.

CNC Machining of Aluminum Alloy Shell

CNC Processing of Tin-Cobalt Alloy for Aluminum Alloy Shell

Tin-cobalt alloy electroplating and cobalt electroplating are similar in tone, but softer and more popular. At present, chromium is mostly used to replace chromium abroad. Electroplating cobalt is not easy for barrel plating, while electroplating tin-cobalt alloy can be used for barrel plating of small parts. In addition, tin-cobalt alloy electroplating has excellent uniform plating ability and barrel plating ability, so it can be applied to workpieces with complex shapes. If double nickel is plated on the bottom layer, its corrosion resistance is no less than that of chromium plating. In order to prevent surface discoloration, chromate impregnation is used to treat the surface, which can also improve its corrosion resistance.

Its appearance is pale rose tone, making people feel very comfortable, and has excellent corrosion resistance. Lustrous

Substrate or bright nickel plating, followed by tin-nickel alloy plating, can get a good glossy surface. If electroplating on the dull surface (pear grain), the original condition of the surface can be reproduced. The plating ability of the electroplating layer is very excellent, almost no leveling effect, so it is suitable for plating products requiring very fine lines and rotary processing.

CNC Turning: retaining customers is the driving force for enterprises to adhere to

CNC lathe processing: retaining customers is the driving force for enterprises to adhere to! The cost of accessing traffic on the Internet is getting higher and higher. Every click is precious, and retaining existing customers is becoming more and more important.

What can be done to effectively retain customers when making inquiries?

I. Attracting Buyers’Eyes with Products

1. Product pictures make buyers want to see: more product information in Alibaba is conveyed to buyers through pictures. The first step for customers to trust our products is to start with the first picture.

The first thing that attracts customers is the picture of the product itself. The second one is the introduction of your product. The product introduction should be concise and concise, and then highlight the advantages of the product. Let people see the characteristics of the product at a glance and attract it.

2. Retain your buyers with services

Service attitude is good or not, mainly depends on whether you have patience, some buyers ask very detailed, and some also like to ask questions one by one, regardless of whether you buy or not to understand, meet such buyers, we must patiently answer, not love to ignore, such buyers even if they do not buy now, will generally come to buy in the future. Your product is a very important potential customer. If he is satisfied with your attitude, he usually comes to your shop first when he needs this kind of product.

3. After the buyer receives the goods, remember how the customers feel about the products

1. It seems that you attach importance to customer care and improve customer satisfaction.

2. Be knowledgeable about your products and collect customers’suggestions.

4. After-sales service to retain repeat customers

It’s much easier to retain an old customer than to launch a new one. Generally speaking, if the buyer feels that your goods are good, he will not want to change the seller again. In addition, your service attitude is first-rate, so he needn’t worry about your customers going shopping elsewhere. To do a good after-sales service is to deliver goods to the buyer in time after the buyer has paid the money. We also need to check the package’s “itinerary” after delivery. Don’t wait until the seller asks why the goods haven’t arrived. Don’t let the buyer worry! If the buyer is not satisfied with the goods, we should be brave enough to assume responsibility, exchange the goods for the buyer and return the goods. We should reassure the buyer and satisfy the buyer. Only in this way can we welcome the buyer to continue shopping. Many people like a store. If they can approve of what they have bought in this store, most of them will collect it. As a seller, we must have a good relationship with the buyers we have exchanged with. Maybe these buyers’friends, or friends of friends, are your next customers!