pin88拼搏体育

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Strict Selection High Quality Material

 

Good raw material is an important factor in high quality of corrugating roll. We select the best raw material manufacturer in China. With high strength and toughness,good hardenability,no obvious temper brittleness,50CrMo alloy steel is specialized material for manufacturing corrugating rolls.Our raw material shell thickness is more than 70mm, the thicker shell can reduce deformation and keep stability during production.

Strict Selection High Quality Material

Good raw material is an important factor in high quality of corrugating roll. We select the best raw material manufacturer in China. With high strength and toughness, good hardenability, no obvious temper brittleness, 50CrMo alloy steel is specialized material for manufacturing corrugating rolls. Our raw material shell thickness is more than 70mm, the thicker shell can reduce deformation and keep stability during production.

Precision Welding Can Be Inseparable

 

Both ends of the roller body should be heated to release the size of the inner bored hole. After the spindle heads are put in, the roller body and the spindle heads should be held tightly after natural cooling.  When everything is ready, a driving fit interface has been formed between the roller body and the spindle heads by means of preheating, welding or bolting. Special care should be taken when welding, because finished corrugated roller body’s temperature will rise constantly when the roller is running, and the roller body also bears pressure of the steam from the inside of the roller body, which will form the so-called “pressure vessel”. In view of this, the roller body and the spindle heads joint must pass the pressure test. When the welding process finished, the work piece shall be put into the furnace for high temperature tempering to reduce stress.

 

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Precision Welding Can Be Inseparable

Both ends of the roller body should be heated to release the size of the inner bored hole. After the spindle heads are put in, the roller body and the spindle heads should be held tightly after natural cooling.  When everything is ready, a driving fit interface has been formed between the roller body and the spindle heads by means of preheating, welding or bolting. Special care should be taken when welding, because finished corrugated roller body’s temperature will rise constantly when the roller is running, and the roller body also bears pressure of the steam from the inside of the roller body, which will form the so-called “pressure vessel”. In view of this, the roller body and the spindle heads joint must pass the pressure test. When the welding process finished, the work piece shall be put into the furnace for high temperature tempering to reduce stress.

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Seiko To Reach Craftsmanship Manufacturing

 

The assembled corrugated rolls are returned to the lathe for reprocessing, with all diameters slightly larger than the finished product. Since all axes rotate in sync, you must make sure they are concentric. This is very important for the smooth operation of the single-sided machine. After this processing, the roller will also be inspected, including magnetic particle flaw detection and pressure testing.

Seiko To Reach Craftsmanship Manufacturing

The assembled corrugated rolls are returned to the lathe for reprocessing, with all diameters slightly larger than the finished product. Since all axes rotate in sync, you must make sure they are concentric. This is very important for the smooth operation of the single-sided machine. After this processing, the roller will also be inspected, including magnetic particle flaw detection and pressure testing.

Meticulosity for Primary Flute Profile

 

When the entire circumference of the roll has been engraved with flutes, the knife is lowered, repeat the above operation, carved a slightly deeper flute. Blanking is also available with the current use of a more common hob. When operating, at the same time the roller body along the circumference of the direction of corrugated. These are just rough working procedures, only carved out the general shape of the flute. Finally, through finish grinding , the corrugated roll of the final flute profile.

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Meticulosity for Primary Flute Profile

When the entire circumference of the roll has been engraved with flutes, the knife is lowered, repeat the above operation, carved a slightly deeper flute. Blanking is also available with the current use of a more common hob. When operating, at the same time the roller body along the circumference of the direction of corrugated. These are just rough working procedures, only carved out the general shape of the flute. Finally, through finish grinding , the corrugated roll of the final flute profile.

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High Hardness from Vertical Quenching Process

 

Intermediate frequency quenching can guarantee both the hardness and harden depth we need. Our harden layer depth can reach to 8-12mm. With harder base material as foundation, the lifetime of our corrugating rolls are greatly extended. After different heat treatment process, the corrugated roller surface becomes more wear-resistant and durable. Some manufacturers groove their lower rollers before the rollers’ were harden, because it is relatively easy to work with soft materials. By this could cause problems in the later heating process for the rollers, which will make the hardness of the rollers change. After heating treatment we cut slots of lower roll though this process needs more time but makes uniform hardness. 

 

Rigorous for Precise Grinding

 

After heat treatment and the cutting slots, the roller shall be put on high precision automatic CNC grinding machine to do finish grinding. Almost every set of corrugating rolls are needed to be designed and customized separately according to the width, diameter, flute height, corrugated paper GSM, speed and cardboard physical index requirement. The designed flute profile is copied on a costly diamond tool. When grinding wheel and diamond tool touch together, the flute profile is dressed on grinding wheel. By grinding wheel grind each flute several times until the accuracy is within our technical permitted requirement. The Siemens control system play a key role in guarantee the accuracy.

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High Hardness from Vertical Quenching Process

Intermediate frequency quenching can guarantee both the hardness and harden depth we need. Our harden layer depth can reach to 8-12mm. With harder base material as foundation, the lifetime of our corrugating rolls are greatly extended. After different heat treatment process, the corrugated roller surface becomes more wear-resistant and durable. Some manufacturers groove their lower rollers before the rollers’ were harden, because it is relatively easy to work with soft materials. By this could cause problems in the later heating process for the rollers, which will make the hardness of the rollers change. After heating treatment we cut slots of lower roll though this process needs more time but makes uniform hardness. 

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Strict Test to Keep Improving

 

Before and after the surface treatment including tungsten carbide plating or hard chrome coating of corrugating rolls, it is needed to check the size, hardness, precision, flute profile, and simulation feeding paper. Special projector is used to check the flute profile and feeding different GSM paper to ensure the performance of corrugating rolls.

Strict Test to Keep Improving

Before and after the surface treatment including tungsten carbide plating or hard chrome coating of corrugating rolls,it is needed to check the size,hardness, precision,flute profile,and simulation feeding paper. Special projector is used to check the flute profile and  feeding different GSM paper to ensure the performance of corrugating rolls.

Durable from Supersonic Tungsten Carbide Spraying

 

Tungsten carbide corrugated roller producing technology is different traditional corrugated roll. Because of the particularity of tungsten carbide material, the requirement of the base material hardness is higher, flute profile before tungsten carbide spraying is more precise, which is needed to match the performance of tungsten carbide.    Spraying technology is the key, which can ensure the hardness and binding force of tungsten carbide.Most advanced Praxair JP 8000 HVOF tungsten carbide spraying equipment and technology is adopted and Praxair 1342 super hard tungsten carbide powder is used for our corrugating roll. Before tungsten carbide spraying, we do sand blasting treatment on the surface which make rough surface to increase adhesion of tungsten carbide powder. 

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Rigorous for Precise Grinding

After heat treatment and the cutting slots, the roller shall be put on high precision automatic CNC grinding machine to do finish grinding. Almost every set of corrugating rolls are needed to be designed and customized separately according to the width, diameter, flute height, corrugated paper GSM, speed and cardboard physical index requirement. The designed flute profile is copied on a costly diamond tool. When grinding wheel and diamond tool touch together, the flute profile is dressed on grinding wheel. By grinding wheel grind each flute several times until the accuracy is within our technical permitted requirement. The Siemens control system play a key role in guarantee the accuracy.

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Durable from Supersonic Tungsten Carbide Spraying

Tungsten carbide corrugated roller producing technology is different traditional corrugated roll. Because of the particularity of tungsten carbide material, the requirement of the base material hardness is higher, flute profile before tungsten carbide spraying is more precise, which is needed to match the performance of tungsten carbide.    Spraying technology is the key, which can ensure the hardness and binding force of tungsten carbide.Most advanced Praxair JP 8000 HVOF tungsten carbide spraying equipment and technology is adopted and Praxair 1342 super hard tungsten carbide powder is used for our corrugating roll. Before tungsten carbide spraying, we do sand blasting treatment on the surface which make rough surface to increase adhesion of tungsten carbide powder. 

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Repeatedly Polished, Smooth As a Mirror

Meijia adopts special polishing crafts, such as the corrugated rollers use America Praxair 1342VM series super hard tungsten carbide roller, special customized polishing wheel. With our company’s fully automatic CNC corrugated roller producing process’s special polishing machine and our independent grinding polishing technology R&D, the tungsten carbide roller’ s surface finish degree can reach Ra<0.6μm, which will improve the accuracy of the flute profile, and make sure the quality of the corrugated roller.

Repeatedly Polished, Smooth As a Mirror

 

Meijia adopts special polishing crafts, such as the corrugated rollers use America Praxair 1342VM series super hard tungsten carbide roller, special customized polishing wheel. With our company’s fully automatic CNC corrugated roller producing process’s special polishing machine and our independent grinding polishing technology R&D, the tungsten carbide roller’ s surface finish degree can reach Ra<0.6μm, which will improve the accuracy of the flute profile, and make sure the quality of the corrugated roller.

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Contact us

Tel:+86-532-86256688

Fax:+86-532-86256588

Email:qdrenhw@163.com

Add:No. 11, Zhongxingda Road, Gongjiazhuang Industrial Zone, Jiaozhou puji Town, Qingdao



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Contact us

 

Tel:+86-532-86256688

Fax:+86-532-86256588

Email:qdrenhw@163.com

Add:No. 11, Zhongxingda Road, Gongjiazhuang Industrial Zone, Jiaozhou puji Town, Qingdao

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