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Stainless steel or stainless iron?can making production line

can making production line

Stainless steel or stainless iron?can making production line

4. Welding

316 stainless steel has good welding performance.All standard welding methods are available for welding.When welding, 316Cb, 316L or 309Cb stainless steel filler rod or electrode can be used for welding according to the purpose.In order to obtain the best corrosion resistance, the welding section of 316 stainless steel needs to be annealed after welding.If 316L stainless steel is used, no post-weld annealing is required.

5. Mechanical properties

Austenitic stainless steel has the lowest yield of all steel.Therefore, in terms of mechanical properties, austenitic stainless steel is not the best material for the stem, because the diameter of the stem will increase to ensure a certain strength.The yield point cannot be improved by heat treatment but can be improved by cold forming.

6. Magnetic

Because of the wide application of austenitic stainless steel, people are under the false impression that all stainless steel has no magnetism.Austenitic stainless steels are generally understood to be non-magnetic, as is the case with hardened-forged steels.But the 304 treated by cold forming is somewhat magnetic.For cast steel, 100% austenitic stainless steel is not magnetic.

7. Low-carbon stainless steel

The corrosion resistance of austenitic stainless steel comes from the chromium oxide coating formed on the metal surface.If the material is heated to 450 ℃ to 900 ℃ high temperature, the structure of the material will change, along the edge of crystal form of chromium carbide.In this way, no chromium oxide protective layer can be formed on the edge of the crystal, which leads to the reduction of corrosion resistance.This corrosion is called intergranular corrosion.

8. Why does stainless steel rust?

Why does stainless steel rust?When the stainless steel tube surface appears brown rust spot (point), people feel surprised: think that “stainless steel is not rust, rust is not stainless steel, may be steel problems”.In fact, this is a one-sided view of the lack of understanding of stainless steel.Stainless steel will rust under certain conditions.

Stainless steel has the ability to resist atmospheric oxidation, that is, rust, but also has the ability to contain acid, alkali, salt in the medium is corrosion resistance, that is, corrosion resistance.However, the corrosion resistance of steel varies with its chemical composition, protective condition, service condition and environmental media type.For example, 304 steel pipe has absolutely excellent anti-rust ability in the dry and clean atmosphere, but it will soon rust if moved to the coastal area in the sea fog containing a large amount of salt.The 316 pipe performed well.Therefore, not any kind of stainless steel, in any environment can resist corrosion, not rust.

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can making production line

Tin can Deep drawing process analysis(tin cans production line)

Tin can Deep drawing process analysis(tin cans production line)  Deep drawing is a cold stamping process in which flat blank or semi-finished blank is deep drawn into an open hollow part by means of a mould.Drawing process can be made into the shape of products: cylindrical, gateway, spherical, conical, rectangular and other irregular open hollow parts.Drawing process combined with other stamping process, can produce complex shape parts, such as blanking process and drawing process combined with blanking compound die.  1. Deformation process of deep drawing  In deep drawing, the blank of the middle plate is first compressed by the blank holder, and the punch goes down, forcing the material (flange part) under the blank holder to generate plastic deformation and flow into the gap between the convex and concave dies to form the side wall of the cylinder.  2. Various drawing phenomena  1) corrugate  When drawing deep, the tangential compressive stress of the flange part is large enough to exceed the anti-instability ability of the material, and the flange part of the material will become unstable and swell, which is called wrinkling.Wrinkling is one of the main causes of waste products in deep drawing process. Normal deep drawing process is not allowed.The pressure of the common pressure ring holds down some materials of the flange to prevent wrinkling.  2) cutting margin  Due to uneven die clearance, thickness change, unequal friction resistance, inaccurate positioning and materials, mechanical properties of directivity, etc., resulting in the drawing part of the high and low, for the high requirements of the drawing part, need to add a cutting process.  3) calculation of blank size  It is mainly based on the principle of volume invariance and the variation of wall thickness in drawing.The principle of equal surface area between workpiece and blank before and after drawing is called equal area method.  4) factors affecting the drawing coefficient  A. mechanical properties of materials  B. Relative thickness of blank T/D  C. Drawing method: when there is a pressure ring, the drawing coefficient M can be smaller.  D. Die structure: the drawing coefficient is greatly affected by the size of the round corner of the concave punch of the drawing die and the clearance between the concave punch.  E. Friction and lubrication conditions: the contact surface between the die, pressure ring and the blank shall be smooth.But punch and blank contact surface to rough some good, not lubrication, in order to increase the friction, reduce the possibility of cracking.  tin cans production line tin cans production line

Tin can Deep drawing process analysis(tin cans production line)

Deep drawing is a cold stamping process in which flat blank or semi-finished blank is deep drawn into an open hollow part by means of a mould.Drawing process can be made into the shape of products: cylindrical, gateway, spherical, conical, rectangular and other irregular open hollow parts.Drawing process combined with other stamping process, can produce complex shape parts, such as blanking process and drawing process combined with blanking compound die.

1. Deformation process of deep drawing

In deep drawing, the blank of the middle plate is first compressed by the blank holder, and the punch goes down, forcing the material (flange part) under the blank holder to generate plastic deformation and flow into the gap between the convex and concave dies to form the side wall of the cylinder.

2. Various drawing phenomena

1) corrugate

When drawing deep, the tangential compressive stress of the flange part is large enough to exceed the anti-instability ability of the material, and the flange part of the material will become unstable and swell, which is called wrinkling.Wrinkling is one of the main causes of waste products in deep drawing process. Normal deep drawing process is not allowed.The pressure of the common pressure ring holds down some materials of the flange to prevent wrinkling.

2) cutting margin

Due to uneven die clearance, thickness change, unequal friction resistance, inaccurate positioning and materials, mechanical properties of directivity, etc., resulting in the drawing part of the high and low, for the high requirements of the drawing part, need to add a cutting process.

3) calculation of blank size

It is mainly based on the principle of volume invariance and the variation of wall thickness in drawing.The principle of equal surface area between workpiece and blank before and after drawing is called equal area method.

4) factors affecting the drawing coefficient

A. mechanical properties of materials

B. Relative thickness of blank T/D

C. Drawing method: when there is a pressure ring, the drawing coefficient M can be smaller.

D. Die structure: the drawing coefficient is greatly affected by the size of the round corner of the concave punch of the drawing die and the clearance between the concave punch.

E. Friction and lubrication conditions: the contact surface between the die, pressure ring and the blank shall be smooth.But punch and blank contact surface to rough some good, not lubrication, in order to increase the friction, reduce the possibility of cracking.

tin cans production line tin cans production line

Tin can Deep drawing process analysis(tin cans production line)  Deep drawing is a cold stamping process in which flat blank or semi-finished blank is deep drawn into an open hollow part by means of a mould.Drawing process can be made into the shape of products: cylindrical, gateway, spherical, conical, rectangular and other irregular open hollow parts.Drawing process combined with other stamping process, can produce complex shape parts, such as blanking process and drawing process combined with blanking compound die.  1. Deformation process of deep drawing  In deep drawing, the blank of the middle plate is first compressed by the blank holder, and the punch goes down, forcing the material (flange part) under the blank holder to generate plastic deformation and flow into the gap between the convex and concave dies to form the side wall of the cylinder.  2. Various drawing phenomena  1) corrugate  When drawing deep, the tangential compressive stress of the flange part is large enough to exceed the anti-instability ability of the material, and the flange part of the material will become unstable and swell, which is called wrinkling.Wrinkling is one of the main causes of waste products in deep drawing process. Normal deep drawing process is not allowed.The pressure of the common pressure ring holds down some materials of the flange to prevent wrinkling.  2) cutting margin  Due to uneven die clearance, thickness change, unequal friction resistance, inaccurate positioning and materials, mechanical properties of directivity, etc., resulting in the drawing part of the high and low, for the high requirements of the drawing part, need to add a cutting process.  3) calculation of blank size  It is mainly based on the principle of volume invariance and the variation of wall thickness in drawing.The principle of equal surface area between workpiece and blank before and after drawing is called equal area method.  4) factors affecting the drawing coefficient  A. mechanical properties of materials  B. Relative thickness of blank T/D  C. Drawing method: when there is a pressure ring, the drawing coefficient M can be smaller.  D. Die structure: the drawing coefficient is greatly affected by the size of the round corner of the concave punch of the drawing die and the clearance between the concave punch.  E. Friction and lubrication conditions: the contact surface between the die, pressure ring and the blank shall be smooth.But punch and blank contact surface to rough some good, not lubrication, in order to increase the friction, reduce the possibility of cracking.  tin cans production line tin cans production line

Basic knowledge of punch die/can making machine production line

can making machine production line

1. The definition of stamping: stamping is to apply pressure or tensile force to sheet, strip by die to make sheet forming, sometimes shear force is applied to sheet to separate the sheet, so as to obtain a certain size,shape and performance.

2. The advantages of stamping machining are as follows:

1) the production efficiency of stamping machining is high, the operation is convenient, and the mechanization and automation are easy to be realized.

2) since the die ensures the precision of the size and shape of the stamping parts and generally does not destroy the surface quality of the stamping parts, and the life of the die is generally longer, the stamping quality is stable, the interchangeability is good, and it has the characteristics of “identical”.

3) stamping can produce parts with large size range and complicated shape, such as stopwatch of clock, longitudinal beam of automobile, panel and so on. In addition, the strength and rigidity of stamping is higher than that of cold deformation and hardening effect of material during stamping.

4) stamping is a kind of saving material, energy saving processing method, and the cost of stamping parts is lower because there is no chip material generation, less material consumption and no other heating equipment.

3. The precision

material thickness of stamping part is ≤ 1mm, the precision of blanking metal workpiece is between IT11mm-13mm or IT10mm-11mm, the material thickness is more than 1mm-2mm, the precision of blanking metal workpiece is between IT14mm,IT11mm-13mm and IT10mm-11mm. Material thickness > 2mm-3mm, the precision of blanking metal workpiece is between IT12mm-14mm or IT11mm-13mm, material thickness > 3mm-5mm, the precision of blanking metal workpiece is between IT12mm-14mm or IT11mm-13mm.

can making machine production line can making machine production line can making machine production line

can production machine line