The billet metal expands outward during the cold extrusion forming of the ring gear profile


During the cold extrusion forming of the inner ring gear tooth shape, the billet metal expands outward. When the upper punch leaves the blank, the metal is reset to the original position. This is the rebound of the metal, which is reflected in the cold extrusion. The size of the tooth tip circle and the root circle of the ring gear is smaller than the size of the punch on the die, so the tooth shape and size are increased, so that the wire cutting according to the size of the standard tooth shape cannot meet the requirement, and must be The tooth profile and size are corrected. The amount of shrinkage is related to the mechanical properties of the material, the size of the cold extrusion, the size of the extrusion force, etc., and can be calculated according to the elastoplastic theory. Since the assumptions of the calculation formula differ greatly from the actual one, the correction value The actual distance is large, and it is generally determined based on experience and corrected. The latter is determined by the die size of the inner ring gear.
The inner ring core structure has a blind spot in the processing of small modulus gears in China. Therefore, the shape of the tooth profile curve of the ring gear is designed by computer aided design. Then, according to the size of the inner ring gear teeth, the tooth profile curve on a single circumference is drawn. Finally, the coordinates of the feature points on the curve and the curvature radius and center coordinate value of the relevant arc are used to form the tooth profile of the inner ring gear. Line cutting program for punching blocks. Through computer-aided design, we have solved the problem of processing the main part and the upper punch in the core structure. Using computer-aided design, after designing the size of the tooth profile, the coordinates of the feature points on the tooth profile curve of a single segment and the radius of curvature and center coordinate of the associated arc.

Flame Cutting Fume Extractors

1. Product description:

Gas cutting is achieved by what is basically a chemical/thermal reaction occurring with iron and iron alloys only. Iron or its alloys may be heated to a temperature at which the iron will rapidly oxidize in an atmosphere of high purity oxygen. There will generate large amount of smoke during gas cutting, which is harmful to worker`s health and the service life of cutting machine. Therefore, dust and smoke extraction system is needed to removal these hazardous partices.

2. Moland Product Series

Portable Fume Extractor series: MLWF50, MLWF70, MLWF100, MLWF360, MLWF120, MLWF200, MLWF280-basic, MLWF280S, MLWF290, MLWF300, MLWF300A, MLWF350, MLWF350D, MLWF400, etc.

Stationary fume extractors: MLWF350-dust bucket type, MLWF500-6T, MLWF500-6T dust bucket type, MLWF500-9T, MLWF800, MLWF800-dust bucket type, MLWF1000, MLWF1500, MLWF2000, MLWF3000, MLWF3500, MLWF4000). The electric control cabinet can be seperated from main equipment for convenient operation when the main equipment is placed outdoors.

Grinding dust extractors: MLWF100D, MLWF150D, MLWF200D, MLWF320-DM, MLWF180, MLWF380, MLWF480) and grinding cabinet (MLWF900). The grinding cabinet is usally equipped with telescopic or fixed grinding room, to form a semi-closed space to control dust and smoke spread. It also improves the filtration efficiency with low air volume and energy consumption.

VOCs treatment

3. R&D

In order to provide advanced products, our R&D department develops 3 to 5 new products every year, and irregularly improves the performance, appearance, and installation methods of existing products.

4. Certification

All our products are approved by CE, ISO9001, ISO14001, utility model patent, design patent, Program copyright, etc.

5. Exhibition

Moland participates at least 5 industry exhibitions each year.

6. Central Fume Extraction System

1) Cantilever type fume extraction system

Cantilever dust removal can be used for manual welding conditions where the work stations are evenly distributed and the span is small. The smoke and dust generated by each welding station can be effectively absorbed at the dust generation point, and will not pollute other parts of the workshop. The skeleton of the suction arm is similar to a human arm and can hover in a space within a certain length. The outer layer of the suction arm is a temperature-resistant hose, which not only prevents the hose from being burned by sparks, but also ensures the flexibility of the movement of the suction arm. A unique rotating structure is designed on the position of the Suction Hood to ensure that the suction hood can be aligned with the welding position in any orientation, so that the suction arm can effectively capture the smoke and dust generated during the welding process. The advantage of the suction arm capture is that it can be close to the place where the smoke is generated, and the collection effect is better.

2) Hood suction type fume extraction system

Cantilever dust removal can be used for manual welding conditions where the work stations are evenly distributed and the span is small. The smoke and dust generated by each welding station can be effectively absorbed at the dust generation point, and will not pollute other parts of the workshop. The skeleton of the suction arm is similar to a human arm and can hover in a space within a certain length. The outer layer of the suction arm is a temperature-resistant hose, which not only prevents the hose from being burned by sparks, but also ensures the flexibility of the movement of the suction arm. A unique rotating structure is designed on the position of the suction hood to ensure that the suction hood can be aligned with the welding position in any orientation, so that the suction arm can effectively capture the smoke and dust generated during the welding process. The advantage of the suction arm capture is that it can be close to the place where the smoke is generated, and the collection effect is better.

3) Room tupe fume extraction system

Room-type dust removal is suitable for the purification of fumes and smoke generated during the production of automated equipment, such as welding robots, welding machines, grinding, grinding and polishing of metal and plastic parts, drilling, thermal processing, cutting and crushing, stone processing, powder packaging, solid particles and various dusts and fumes produced by mixing and processing.

For working conditions such as robot automatic welding, circular seam and longitudinal seam welding, the smoke and dust purifier is installed with the robot workstation, so that the workstation has its own dust removal function. The fume and smoke are effectively collected through equipment components such as pipes and dust hoods. The room-type design prevents the volatilization and diffusion of smoke to keep the air in the workshop clean.

The working conditions with moderate welding workpieces and large amounts of dust and smoke are suitable for room-type treatment solutions. The room type centralized dust dedusting solution is divided into side suction and top suction method dust collecting ways. The appropriate solution can be designed according to the site conditions and treatment goals.

4) Blow suction type fume extraction system

Blow-suction type dust removal solution is a ventilation air flow composed of blown air and inhaled air flow. Therefore, it is a dust removal method that can effectively control the spread of pollution sources. This dust removal method is installing exhaust inlets on two-span center column or single-span side column (wall) and air outlets on the opposite wall column to form a circulating air flow to drive the smoke and dust into the purification machine, consequently performing overall dust removal and purification in the workshop. This system occupies a small area and has obvious purification effect, which is suitable for the purification of smoke and smoke in more complex production workshops.

7. Company information

Jinan Moland Environmental Tech Co., Ltd., is located in No. 11889 Jingshi West Road, Changqing District, Jinan City, Shandong, China, established in 2016. It`s an environmental protection technology enterprise specializing in research, development, manufacture and sale of efficient smoke purification systems.

The company is committed to reducing the environmental impact of production process, protecting workers from harmful gases and dust, and creating a cleaner working environment. At present, the company′s products have been successfully applied in automobile, railway, construction machinery, marine engineering, aviation and other mechanical processing industries, as well as new materials, grain, wood, recycled resources processing and other industries. The company has passed the ISO 9001 quality management system certification, obtained the certification of China Environmental Protection Products issued by China Environmental Protection Industry Association, and CE certification of EU. It also has a number of invention patents, utility model patents and appearance patents. Through continuous R&D and innovation, many products of the company have reached the international leading level.

Moland′s environmental services cover the whole process from project design, product manufacturing to installation, commissioning and after-sales service. We will provide you with the most professional governance program and the best quality service.


Flame Cutting Fume Extractors,High Efficiency Cartridge Fume Purifier,Welding Dust Remover,Dust Control Systems

Jinan Moland Environmental Tech Co.,Ltd , https://www.sdmoland.com