Laser Cutting Services

Dalilai Mfg provide Laser Cutting services to custom sheet metal parts for our clients, bending,welding,riveting…

Laser Cutting for sheet metal fabricating China Manufacturer

Laser Cutting Services for Custom Sheet Metal Fabrications

Dalilai provide laser cutting services for Custom Sheet Metal Fabricating products for worldwide clients, Good service and the constantly pursuit of quality, is the basis for us to win the trust of customers, have won the trust and praise of customers around the world, welcome to consult and negotiate cooperation!

Our laser cutting machine can produce maximum thickness 30mm carbon steel & aluminum, 10mm stainless steels.

Laser cutting is mainly used to produce the casings of various equipment and instruments, kitchen supplies, trash cans and various large-size sheet metal parts & various sheet bending parts. It can save the high cost of metal stamping die and machining time.

The material can be cold rolled steel / hot rolled steel / stainless steel / galvanized steel / iron and other hardware materials, we can do finishes of Spraying, baking, galvanizing, mirroring or grinding, etc.

Laser Cutting Services
Laser Cutting Services

sheet metal bending service
sheet metal bending service

Welcome visit our blog, if you have any sheet metal parts need to be fabricated by laser cutting services, pls feel free contact wtih us.

Laser Cutting Services China
Sheet Metal Fabricated Parts China
Sheet Metal Fabricated Parts China
Sheet Metal Fabricated Parts China

The differences between laser cutting and die stamping

Because the limitation of processing methods affects the processing accuracy of the material, the material not only meets the specifications after processing, but also is often used as waste, causing a lot of waste. Therefore, the work unit should pay attention to choose professional and reliable equipment to complete the material Processing and production operations, this is the best choice to complete the operation process using laser cutting and processing methods.

Laser cutting

So, what is the difference between laser cutting and die stamping? Through the above introduction, we can understand that there are some problems with the accuracy of the material and the processing speed when cutting with the die stamping method, which is caused by the backward processing method. Using laser cutting materials can solve these problems well.

When processing materials by laser cutting, a special device can emit laser light to form a laser beam and emit light on the surface of the material. The temperature of the laser beam is high and the melting point of the material can be reached quickly. When touching the surface of the material, the material can be cut to a certain size, and the processing speed can be increased by this processing method. It can also guarantee the essence of processing to ensure the working quality of material cutting operations, and the laser cutting method can certainly achieve the ideal operation purpose.

ISO9001-2015 Certificate

ISO9001-2015 Certificated metal parts manufacturer from China, specialize in CNC machining,sheet metal stamping & pipe fabricating services.

Ningbo Dalilai Machinery Mfg Co., Ltd is a professional metal parts manufacturer from China.

We have been engaged in machining industry for 20 years, serving customers all over the world. We have a variety of mechanical equipments to produce various types of metal parts, such as CNC turned parts, CNC machining parts, Metal stampings & Deep drawing parts, straight tube and curved pipe fabricated components. We provide one-stop service from the procurement of raw materials to the surface treatment.

Mainly for the global customers to customize the processing of various parts, obtained good satisfaction.

If you have any metal parts need to be custom produced, Please feel free contact with us, we will reply you in 48hours.

ISO certificate

ISO9001-2015 Metal Parts Manufacturer

Precision machined parts processing method

Introductions of some common processing methods of Precision Mechanical parts, such as turning, milling…

precision machined partsSome methods of precision machined parts processing. Lathe refers to the machine tool which takes the workpiece rotation as the main motion and the turning tool movement as the feed motion to process the reverse appearance. It can be used to process various Inversion Forming surfaces, such as surface cylindrical surface, surface conical surface, surface thread, end face, groove, knurling, etc. It is the most widely used metal cutting machine tools, the longest prenatal history, the most variety of a machine tool.

There are many kinds of lathes. According to their uses, they can be divided into appearance lathe, horizontal lathe, single-axle active lathe, multi-axle active and semi-active lathe, turret lathe, vertical lathe, multi-tool semi-active lathe, specialized lathe and so on. General machine tools are the most common machine tools for turning workpieces.

Turning is the removal of metal from the workpiece. Together with the rotation of the workpiece, the tool cuts into or along the workpiece. Boring is a method of enlarging or further processing holes drilled or cast on metal workpieces. Boring on a lathe is completed by turning one side of a single-edged tool and feeding it to the workpiece.

High Precision CNC Turning & Milling Service

China Metal Parts manufacturer custom high precision CNC turning & machining Parts for worldwide customers, exellent quality is our constantly pursuit.

Custom High Precision CNC Turning Parts For worldwide Customers.

Ningbo Dalilai Mfg  have several high precision CNC turning machines imported from Japan, equipped with automatic feeding system, which can produce high quality precision machining parts.We also have high precision CNC machine compound of turning and milling, which can produce precision machine parts with high concentricity and high finish. we proud of our machining capability that can provide our customers high precision CNC turning & milling services.

Available Materials:
Stainless Steel:SS201,SS301,SS304,SS304,SS430
Aluminum Alloy: AL6061,AL6068,AL7075…
Steel: AISI1020,AISI1045,42CrMo…
Copper & Brass: T1,T2,E-Cu,H63,H59…
Highest Accuracy:±5μm

High Precision CNC Turning & Milling parts
Precision CNC turned parts

(1) Shorten the product manufacturing process chain and improve production efficiency.

The CNC turning and milling compound center can install a variety of special tools, new tool arrangement, reduce tool change time and improve processing efficiency. Turning and milling compound processing can achieve all or most of the processing procedures in one clamping, which greatly Shorten the product manufacturing process chain. In this way, on the one hand, the production assistance time caused by the change of the installation card is reduced, and at the same time, the manufacturing cycle and waiting time of the tooling fixture are reduced, and the production efficiency can be significantly improved.

In the machining efficiency of the CNC turning and milling compound center, the new type CNC turning and milling compound center can be loaded with more special processing tools. The tool arrangement is completely different from the previous traditional CNC processing machinery, which can reduce the tool change time and improve the processing efficiency. , Turning and milling composite processing can achieve all or most of the processing procedures in one clamping, which greatly shortens the product manufacturing process chain.

(2) Reduce the number of clampings and improve the machining accuracy.

The reduction in the number of card installations avoids the accumulation of errors caused by the conversion of the positioning reference. At the same time, most of the current turning and milling processing equipment has online detection function, which can realize the in-situ detection and precision control of key data in the manufacturing process, thereby improving the processing accuracy of the product; the high-strength integrated bed design improves the difficulty The gravity processing ability of the cutting material; the turning-milling machine tool is equipped with an automatic feeding device, which can realize automatic feeding to continue, and basically realize the assembly line operation of a single machine tool.

During turning and milling, the tool performs intermittent cutting, which can obtain relatively short cutting of the workpiece formed of any material, which is easy to automatically remove chips. And the intermittent chip can allow the knife to have sufficient time to cool, reduce the thermal deformation of the workpiece, and also increase the service life of the tool. Compared with traditional CNC machine tools, the turning speed of turning and milling is higher, the quality of the cut products is better, and the cutting force is reduced, the precision of thin-walled rods and slender rods is improved, and the quality of the workpiece is high.

Because the cutting speed can be decomposed into the rotational speed of the workpiece and the rotational speed of the tool, according to the mechanical characteristics, the rotational speed of the tool can be increased, and the rotational speed of the workpiece can be reduced to achieve the same processing effect.

This feature is especially suitable for the processing of large forging blanks Effective, because the reduction of the forging blank speed can eliminate the periodic changes of vibration or radial cutting force caused by the eccentricity of the workpiece, thereby ensuring the smooth cutting of the workpiece and reducing the errors in the machining of the workpiece.

When the turning and milling machine tool processes the workpiece, the low speed of the workpiece can effectively reduce the centrifugal force of the workpiece, avoid deformation of the workpiece, and help improve the machining accuracy of the part. The larger longitudinal feed can also be used to achieve precise cutting in turning and milling, and the surface roughness can also be effectively guaranteed. The turning and milling composite machine tool can use different methods such as turning, milling, drilling, and boring to process the workpiece. Able to complete multi-face machining tasks with one clamping, ensuring machining accuracy.

If you have any high precision parts which need High Precision CNC Turning & Milling Service supported in China, welcome send a inquiry to us.

Analyze the causes of wrinkling and cracking of deep-drawn stamping parts?

Analyze the causes of wrinkling and cracking of deep-drawn stamping parts

China Dalilai Mfg is Engaged in deep drawing stamping processing for 15 years.

When the stamping parts processing factory processes the deep drawn stamping parts, the problems that are easy to appear are: the wrinkling of the flange deformation area and the pulling of the cylinder wall force transfer area;

What is wrinkling in the flange area?
It is the bending caused by the loss of stability of the sheet due to tangential compressive stress;

What is cracking in the power transmission area?
It is caused by the tensile stress exceeding the tensile strength of the sheet material fracture;

The wrinkling of the flange deformation area is mainly due to;

1. The size of the tangential compressive stress σ3, the larger the more likely to be unstable wrinkling;
2. The ability of the sheet material in the flange area to resist instability;

The larger the flange width and the thinner the thickness, the smaller the elastic modulus and hardening modulus of the material, and the smaller the resistance to instability;
The cracking of the cylinder wall mainly depends on the following two;

1. Anti-stress in the cylinder wall force transfer area;
2. The tensile strength of the cylinder wall force transfer area;

When the tensile stress of the cylinder wall exceeds the tensile strength of the cylinder wall material, the deep-drawn stamping part will break at the corner of the bottom where the corner is tangent to the cylinder wall-“dangerous section”;

Dalilai Mfg has rich experience in sheet metal die stamping services, can provide high-quality deep drawn stamping processing services.

The principle of selecting suitable materials for stamping parts is very comprehensive

The principle of selecting suitable materials for stamping parts

In the production of stamping parts, choosing the right material is the most basic work. Only by choosing the right material can the ideal product be produced in the subsequent processing. Most of the stamping plants now know very little about how to choose materials. The selection of stamping materials mainly has the following principles:
First, the bending process should not use highly elastic materials

Pressed and bent steel needs to have good plasticity, lower yield strength and lower elasticity. Steel with good plasticity is not easy to bend and crack when bending; it has low yield. The steel material with low strength and low elasticity has little springback deformation after bending and forming, and it is easy to obtain a precise bending shape. In the steel, low-carbon steel and brass and other well-shaped materials are easy to bend, and high-elastic materials (such as high-carbon steel, stainless steel, spring steel) are difficult to obtain accurate dimensions due to large springback during bending Bend shape. The higher the yield strength of the material, the harder and more elastic the material, and the greater the amount of springback, the worse the dimensional accuracy of the bending part. Therefore, it is not suitable to use such highly elastic materials in the bending process.

Second, the deep drawing process should not use materials with poor plasticity

The stretching process should not use materials with low material elongation. The better the plasticity of the material, especially the higher the uniform elongation, it means that the stretch forming is performed between stable and uniform deformation. The later the necking occurs, the stretch forming is less likely to crack, so the tensile properties Just fine. In the stretching process, the more difficult it is to deform in the thickness direction, the less likely the punch fillet area (here is the dangerous section of tensile deformation) to thin and break, so the better the tensile properties.

冲压材料

Third, ordinary spinning should not use hardened materials

The common spinning materials are mostly pure aluminum, low carbon steel and stainless steel, and the proportion of low carbon steel and stainless steel exceeds 60%. Normal spinning should use soft materials with good plasticity, low yield point, few impurities and uniform organization. Pure aluminum and 3A21 aluminum alloy have the best spinability, 2A12 duralumin and low carbon steel are good, and 5A03 and 5A06 are poor. Stainless steel is best heated and spun.

Fourth, the elongation forming process should not use materials with poor plasticity

In the stamping process, flaring, reaming, bulging, bending, eversion tube, and partial stretching belong to the type of elongation deformation; stretching, diameter reduction, inside turning tube, and tube blank upsetting belong to compression type forming. Elongation forming Because the deformation zone is mainly subjected to tensile deformation of positive stress and positive strain properties, the material in the deformation zone is prone to excessive elongation. When this elongation exceeds the material’s ultimate elongation, it is easy to crack. Therefore, materials with poor plasticity should not be used in the elongation forming process.

Fifth, it is not appropriate to use materials with poor resistance to instability in the compression forming process

In compression forming, the deformation zone is mainly subjected to compression deformation of compressive stress and compressive strain properties. Under the action of compressive stress, the sheet material is prone to instability and wrinkling. Therefore, in order to improve the stability of plastic deformation, it is not appropriate to choose materials with poor anti-stability.

冲压材料的选择

Sixth, it is not suitable to use materials with small strain hardening index in the forming parts that mainly take elongation

The strain hardening index is closely related to the sheet metal stamping performance. According to the theory of plastic deformation limit, when uniaxially stretched, the maximum elongation strain when the sheet is subjected to concentrated necking is 2 times. In general, the material will rupture soon after the concentrated necking occurs. Therefore, the greater the strain hardening index of the material, the stronger the local resistance to cracking, the plastic strain distribution tends to be uniform, and the peak strain value is low The overall forming limit of sheet metal forming, therefore, it is not appropriate to use materials with a small strain hardening index in forming parts that are mainly elongated.

Seven, cold extrusion process should not use high-strength, low plastic materials

The cold extrusion process should not use high-strength, low-plasticity materials, so as not to increase deformation resistance and cracks. The requirements of cold extrusion equal volume forming on the material are: the material should have high plasticity, low yield point and low work hardening sensitivity. Commonly used cold extrusion materials are pure aluminum and aluminum alloys, copper and copper alloys, low carbon steel, medium carbon steel, low alloy steel, etc. The extruded products of this kind of material have a smooth surface and a dimensional accuracy, and can withstand large plastic deformation at once, extruding products with complex shapes. On the contrary, like high carbon steel (45-70 steel), high alloy steel (40Cr), carbon tool steel, etc., the extrusion force is large and the forming is difficult. Warm extrusion or hot extrusion should be used.

Precision machined parts processing method

Introductions of some common processing methods of Precision Mechanical parts, such as turning, milling…

precision machined partsSome methods of precision machined parts processing. Lathe refers to the machine tool which takes the workpiece rotation as the main motion and the turning tool movement as the feed motion to process the reverse appearance. It can be used to process various Inversion Forming surfaces, such as surface cylindrical surface, surface conical surface, surface thread, end face, groove, knurling, etc. It is the most widely used metal cutting machine tools, the longest prenatal history, the most variety of a machine tool.

There are many kinds of lathes. According to their uses, they can be divided into appearance lathe, horizontal lathe, single-axle active lathe, multi-axle active and semi-active lathe, turret lathe, vertical lathe, multi-tool semi-active lathe, specialized lathe and so on. General machine tools are the most common machine tools for turning workpieces.

Turning is the removal of metal from the workpiece. Together with the rotation of the workpiece, the tool cuts into or along the workpiece. Boring is a method of enlarging or further processing holes drilled or cast on metal workpieces. Boring on a lathe is completed by turning one side of a single-edged tool and feeding it to the workpiece.

Benefits of CNC Machining

CNC Machining CNC Machining, or Computer Numerical Control Machining involves the use of …

1. The advantages and disadvantages of CNC machining
advantage:
(1) The number of tooling is greatly reduced, and machining of parts with complex shapes does not require complicated tooling. 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 the development and modification of new products.
(2) The processing quality is stable, the processing accuracy is high, and the repeat accuracy is high, which is suitable for the processing requirements of the aircraft.
(3) The production efficiency is higher in the case of multiple varieties and small batch production, which can reduce the time for production preparation, machine tool adjustment and process inspection, and the cutting time is reduced due to the use of cutting volume.
(4) It can process complex profiles that are difficult to process with conventional methods, and even process some unobservable processing parts.
Disadvantages: machine tool equipment is expensive, requiring maintenance personnel to have a high level.
2. The technology of CNC machining
(1) The dimensions should be consistent with the characteristics of CNC machining
In CNC programming, the size and position of all points, lines, and areas are based on the origin of the programming. Therefore, the coordinate dimensions are given directly on the part drawing, or the dimensions are quoted with the same reference as far as possible.
(2) The conditions of geometric elements should be complete and accurate
In the process of programming, programmers must fully grasp the parameters of the geometric elements that constitute the part outline and the relationship between the geometric elements, because all the geometric elements of the part outline must be defined during automatic programming, and each node must be calculated during manual programming The coordinates of, no matter what point is unclear or uncertain, programming can not be carried out. However, due to inadequate consideration or neglect in the design process of the part designer, the parameters are often incomplete or unclear, such as whether the arc and the straight line, the arc and the arc are tangent or intersecting or separated. Therefore, when reviewing and analyzing the drawings, you must be careful, and if you find a problem, contact the designer in time.
(3) Reliable positioning reference
In CNC machining, the processing procedures are often concentrated, and positioning on the same reference is very important. Therefore, it is often necessary to set some auxiliary benchmarks or add some process bosses on the blank.
(4) Uniform geometry type or size
The shape and internal cavity of the parts adopt a unified geometric type or size, which can reduce the number of tool changes, and may also use control programs or special programs to shorten the length of the program. The shape of the parts is as symmetrical as possible, which is convenient for programming using the mirror processing function of the CNC machine tool, so as to save programming time.

China Dalilai Mfg provide CNC machining & CNC turning services, custom making CNC turned part and CNC machined parts according customer’s design.

Welcome send us a emial to discuss your project !