What’s CNC machining?

CNC machining stands for computer numerical control.CNC machine tool programming controlled by CNC machining language. What kind of Cartesian position coordinates are used for the processing tools of the CNC machine tool, and control the feed speed and spindle speed of the tool, as well as the tool changer, coolant and other functions. Compared with manual machining, CNC machining has great advantages. CNC machining can produce parts faster, more accurately, and more accurately, and can produce parts with complex shapes that cannot be completed by manual machining. CNC machining has also reduced the labor cost of manual processing that was originally done by humans.

What are the benefits of CNC machining?

① The number of tooling is greatly reduced, and complex tooling is not required for processing parts with complex shapes. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.
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②The processing quality is stable, the processing precision is high, and the repeat accuracy is high, which is suitable for the processing requirements of the aircraft.

③The production efficiency is higher in the case of multi-variety and small batch production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and reduce the cutting time due to the use of the best cutting amount.

④It can process complex profiles that are difficult to process by conventional methods, and even process some unobservable processing parts.

⑤Reduce the labor cost of manual processing that was originally done manually

However, due to the high cost of CNC machine tools and the requirement for high-level technical personnel, the cost of machining will be relatively high.

What is the difference between zinc plating,nickel plating and chrome plating?

Electroplating is the process of using electrolysis to attach a metal film to the surface of metal or other materials to prevent metal oxidation, improve wear resistance, conductivity, light reflection, corrosion resistance and aesthetics.

Electroplating is divided into gold plating, silver plating, chrome plating, nickel plating and zinc plating. it is usualy use zinc plating, nickel plating and chrome plating in the field of metal manufacturing.

What is the difference between them?

zinc plating: Galvanizing refers to the surface treatment technology of plating a layer of zinc on the surface of metals, alloys or other materials for aesthetics and rust prevention.
Features: low cost, general anti-corrosion, silver white.
Application: screws, circuit breakers, industrial supplies, etc.
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Nickel plating: A method of plating a layer of nickel on metal or certain non-metals by electrolysis or chemical methods.
Features: beautiful, can be decorated, high price, slightly complicated craftsmanship, the color is silvery white and yellow.
Application: Energy-saving lamp holder, coins, metal parts, etc.

Chrome plating: Chromium is a kind of bright white metal with a bluish tint. It is a method of plating a layer of chromium on metal or some non-metals by electrolysis or chemical methods.
Features: There are two types of chromium plating. The first one is for decorative purposes. It has a bright appearance and good abrasion resistance. The anti-rust ability is not as good as galvanized and is worse than oxidation. The second is to increase the hardness and wear resistance of metal parts. .
Application: Bright decorative parts, tools, faucets, etc. on home appliances, electronics and other products.

In a word, the biggest difference between them as following :
1. Chrome plating is mainly to improve surface hardness, beauty and rust prevention. The chromium plating layer has good chemical stability, and has no effect in alkali, sulfide, nitric acid and most organic acids
2. Nickel plating is mainly wear-resistant, anti-corrosion, and anti-rust, and generally has a thinner thickness.
3. Galvanizing is mainly beautiful and anti-rust. Zn is an active metal that can react with acid, so it has poor corrosion resistance.

The operation life of tools is a problem in machining production

Currently, CNC manufacturing companies are facing many challenges in production:
1) Reduce the cost of individual parts to maintain competitiveness
2) Break through the bottleneck of processing
3) Improve metal removal rate
4) Improve the utilization rate of machine tools
5) Reduce tool clamping or tool changes

There must be a way to produce the component more cost-effective! Progress isn’t always big changes are needed every time. The progress in actual production is usually obtained by many small optimizations, but the benefits brought by it are greatly improved.

The extension of the operation life of tools and the enhancement of wear resistance and heat resistance can help minimize unexpected downtime, improve the safety, processing efficiency and productivity of the turning process, and reduce the waste of cemented carbide inserts and workpiece materials. It is a necessary condition to realize sustainable processing.

GC4425 tool is the material of choice for steel turning, and it performs better than competitors in most steel turning applications. The wear resistance, heat resistance and toughness of the new material have been improved.

And expand the scope of application:
1) Low alloy steel and non-alloy steel
2) Suitable for mass production
3) External and internal machining
4) Continuous cutting and slightly interrupted applications in finishing machining and roughing machining

The impact of the rising price of raw materials

What kind of impact does the rise of metal raw materials bring to CNC machining factory? In particular, metallic copper belongs to a variety that has a strong linkage with the international market. From March last year to May this year, the domestic copper price soared from around 35,000 yuan per ton to 75,000 yuan per ton.

As the epidemic swept the world last year, and then the world’s major economies continued to expand money supply to stimulate the economy, copper prices soared to the current more than 70,000 yuan, a record high in the past 15 years. Since May this year, copper processing companies have experienced a reduction in output, which is the same period in previous years. The raging production scene is in sharp contrast, production has been forced to slow down, and shipments have dropped significantly, resulting in a high inventory of finished products.
      Precision machining service companies custom cnc machining metal cnc turning stainless steel parts  Precision machining service companies custom cnc machining metal cnc turning stainless steel parts
After the Spring Festival this year, global copper inventories increased by 200,000 tons year-on-year. In the same period of the previous year, the conventional inventory fell by 200,000 to 300,000 tons. The rapid increase in copper prices inhibited downstream processing demand. The increase in raw material prices, coupled with the superimposition of exchange rate, freight and other factors, As a result, the prices of some products have increased significantly.

Sellers are also actively making suggestions for customers to save transportation costs through methods such as sub-packaging by sea. In order to relieve pressure, business operators reduce the impact of rising raw materials through bulk purchases and storage of raw materials in advance. At the same time, actively develop domestic and foreign markets and diversify sales channels.

How can the CNC machining service industry achieve sustainable development?

Nowadays, all walks of life are pursuing sustainable development, from Fisheries, Furniture to Energy and Construction.

In fact, from a narrower perspective, the CNC machining service industry has also been pursuing some form of sustainability.
Throughout history, manufacturers have been trying to find ways to make the CNC machining process more efficient and cost-effective, including the continuous development of advanced and sophisticated production machinery, improved cutting tools, and optimization of the entire cutting system. Specific strategies include high-speed machining, high-feed machining, high-performance machining, and digital machining.

A recently proposed sustainable machining plan aims to reduce the consumption of raw materials, energy use and waste generation throughout the product life cycle, so that it can at least reach a level that is balanced with the earth’s carrying capacity. Usually, discussions on sustainability focus on macro-global environmental issues, while ignoring basic elements such as price, cost, customer satisfaction, process knowledge, and reliability. When it comes to the sustainability of machining, true success begins with simple, straightforward steps and analysis.

Economic sustainability includes many aspects (sustainable pricing, invisible costs, customer satisfaction, waste and measurement, compensation and sustainability, reliable processing technology, reduction of energy consumption, and maximum efficiency), but in general In other words, these components are fundamental and straightforward. Most importantly, economic sustainability means that manufacturers need to realistically and accurately assess waste in all aspects of the production process and take reasonable countermeasures.
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01. Sustainable Pricing
Making sustainable prices for goods or services is a challenge that every business faces. The price must be sufficient to cover costs and generate profits, but must attract customers in market competition. If the customer thinks the product is value for money, the manufacturer has room to set a higher price.
On the other hand, if pressure from customers and competitors leads to under pricing, profit margins will be affected. When the price is lower than the production cost, it will cause losses. If competitive pressure makes prices too low, then product designers and processors must find cheaper, faster, and better production methods to cut production costs and maintain sustainable profit margins.

02 Customer Satisfaction   
Customer satisfaction is a key element of sustainable economic development. What customers care about is when the order will be delivered. In the minds of customers, the “delivery time” is calculated from the time the order is placed. And the delivery time is more than just production time. If it takes three weeks to process a part, but two weeks before and after the management activities, the workshop must frankly inform the customer that the delivery time is five weeks. Metal cutting equipment suppliers, including Seco Tools, provide tool inventory management, tool identification and machine tool monitoring systems that enable workshop personnel to track customer operations and maximize workshop capacity to meet delivery targets and maintain customer satisfaction.

03 Reliable processing technology
Sustainable processing is reliable and predictable, and can minimize energy waste. Unreliable processes can lead to rework or scrapping of parts, as well as waste of raw materials, energy and labor due to unqualified products.
For a long time, CNC machining manufacturers have pursued economic sustainability by processing high-quality products with competitive prices to support and maintain their business development.

Heat Treatment of Precision screws

The heat treatment of precision screws refers to a metal thermal processing technology in which the screw is in a solid state through heating, heat preservation and cooling to obtain the expected structure and performance. In many cases, heat treatment is used to increase hardness, strength and increase wear resistance.

The heat treatment process includes 3 steps:
1.Heating: The metal is heated to a specific temperature, at which the structural characteristics will change.
2.Soaking: Keep the metal at a specified temperature until the entire part is evenly heated.
3.Cooling: The metal cools back to room temperature at a specified rate.

Heat treatment is mainly used for steel screws and stainless steel screws. Jiesheng Hardware has rich experience in processing and heat treatment of various alloy steel and carbon steel materials, which can meet your project requirements.
There are four types of heat treatment:
Annealing: is to heat the workpiece to an appropriate temperature, use different holding time according to the material and workpiece size, and then slowly cool it, the purpose is to make the internal structure of the metal reach or close to the equilibrium state, obtain good process performance and use performance, or for further quenching Prepare for organization.
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Normalizing: is to heat the workpiece to a suitable temperature and then cool it in the air. The effect of normalizing is similar to annealing, except that the resulting structure is finer. It is often used to improve the cutting performance of materials, and sometimes used for parts that are not demanding. As the final heat treatment.

Quenching: is the rapid cooling of the workpiece in quenching media such as water, oil, other inorganic salts, and organic aqueous solutions after heating and holding the workpiece. After quenching, the steel parts become hard, but at the same time become brittle. In order to eliminate the brittleness in time, it is generally necessary to temper in time.

Tempering: is to reduce the brittleness of steel parts. The quenched steel parts are kept at an appropriate temperature higher than room temperature but lower than 650°C for a long time before cooling.

Jiesheng Hardware custom manufacturing precision screws for customers in aerospace,medical ,safety ,lighting ,3D printing,electrical, and various other industries. We cooperate with many qualified heat treatment partners. If your project requires heat-treated precision screws, please contact us immediately so that we can provide you with a quote.

What is the difficulty of deep hole machining ?

In the past 20 years of CNC machining experience of Jiesheng Hardware, we often receive some deep hole product consultations. At this time, our engineering team will conduct in-depth communication with customer engineers and designers to discuss the difficulties of deep hole processing. And solutions so that we can assist clients in evaluating each potential design option.

Difficulties of deep hole processing:
1. The tool bar is limited by the aperture, the long diameter of the hole is relatively large, the drill pipe is thin and long, the process system has poor rigidity and low strength, it is prone to vibration during cutting, the drilling is easy to deviate, ripples and taper, which affect the deep hole Straightness and surface roughness;

2. When drilling and reaming, it is difficult to input the cooling lubricant into the cutting area without special equipment, which reduces the tool durability.

3. Chips are not easy to discharge. Due to the depth of the hole and the long path of the chips, it is prone to blockage, causing the drill to break. Therefore, the length and shape of the chips must be controlled, and forced chip removal must be carried out.
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4. Deep hole machining is in a closed or semi-closed state, and the cutting condition of the tool cannot be directly observed. You can only rely on experience to judge whether the cutting process is normal by listening to the sound, watching the cutting, touching the vibration and workpiece temperature, watching the instrument, observing the machine load and pressure gauge, touch vibration and other appearance phenomena

5. In order to ensure the smooth progress of the deep hole in the processing process and achieve the required processing quality, the tool internal (or external) chip removal device, tool guide and support device and high-pressure cooling and lubricating device should be added;

6. The tool has poor heat dissipation conditions, and the cutting heat is not easy to dissipate. In general, 80% of the cutting heat is taken away by the chips during the cutting process, while only 40% of the deep hole drilling. The tool accounts for a large proportion of the cutting heat, spreads slowly, and is easy to overheat. The knife edge temperature can reach 600 degrees, which must be enforced. Cooling method

Therefore, the following points should be paid attention to in deep hole processing:

1) Accurate positioning of the workpiece.
2) The fixture is installed correctly.
3) The blank has no defects such as looseness, pores, blisters, hard spots, etc.
4) Control the size, position accuracy and positioning pin accuracy of the positioning pin hole.
5) Processing drill bit requires center cooling.
6) The drill speed and cutting speed are precisely controlled during secondary drilling.
7) Strictly control the depth of each drill bit.
8) Remove the iron filings from the hole in time.

REACH (SVHC) Reports for CNC Machining

Some Jiesheng hardware customers will request REACH (SVHC) reports when they start their first cooperation. The report provides detailed verification, proving that all the specified requirements of the customer’s customized cnc machining parts have always been met. Many years ago, medical, automotive and aerospace industries customers were most likely to request REACH (SVHC) reports. Today, a wide range of industry customers are demanding them.

REACH is short for REGULATION concerning the Registration, Evaluation, Authorization and Restriction of Chemicals (REGULATION concerning the Registration, Evaluation, Authorization and Restriction of Chemicals), established by the European Union and implemented on June 1, 2007. Product supervision system.China manufacturer custom double open ended adjustable wrench AN3-AN20 spanner set hose fitting wrench aluminum AN wrench

REACH regulates a wide range of products, covering almost all products exported to the EU. Products that require SVHC testing include but are not limited to: electronic and electrical products, furniture, automobiles, textiles, toys, clothing and series, cosmetics, etc. Our metal parts also need to undergo SVHC testing.

Jiesheng hardware provides REACH (SVHC) compliance report and SGS material certificate for each production order. These certificates require more resources to complete (cost, time and personnel), so we usually ask the customer to inform the specific application of the ordered product and its performance requirements during the communication process, so that we can make the report as soon as possible.