China SGS Certificated Half Gear by Sand Casting worm gearbox

Solution Description

Merchandise Parameters

 Material:ZG42CrMo

Content C Si Mn P S Cr Mo
ZG42CrMo .38-.forty three .fifteen-.35 .seventy five-1.00 ≤0.035 ≤0.035 0.eighty-1.10 0.15-.twenty five

 

GB ISO ASTM JIS EN GOST
ZG42CrMo 42CrMo4 4140 SCM440 EN42CrMo4 38XM

 

Product Standard
Casting Material EN 15713/EN 10571/BS 3100/DIN 1681/DIN17205
Casting Tolerance in Blank ISO 8062 CT 13
Size Tolerance DIN ISO 2768m
NDT ASTM A609 Degree 2 or 3 /EN 12680/ASTM E94 Degree 2 or three
Heat Remedy Normalizing+Tempering+Quenching
Hardness As Essential

 

Company Profile

Haian CZPT Casting Co.,Ltd. is recognized in 2003 in CZPT Town.

In 2007,we moved our manufacturing unit to Sunzhuang city and now we can offer bigger metal castings with max. bodyweight forty five tons.

In 2011,we created a new sand mildew maiking workshop with a hundred and twenty tons refinining CZPT and the max. weight can be one hundred twenty tons.

In 2013,we compensated a lot more attenion on the castings for shipbuilding and commenced to source marine castings for most of domestic popular shipyards.

From 2013 to 2571,we acquired a lot more and much more devices to bolster our capacity from rough machining to completed machining.

In 2571,we created another new sand mould creating workshop for the rapid development of marketplace requirement.

Now we regular monthly supply 6000 tons various castings for different clients of distinct sector,such as cement mill,shipubuilding,petroleum machinery,rolling mill,forging push and so on.

Prdocution Method

1.Quotation
When we obtain the drawing and specialized need from consumer,
we will firslty check out whether or not we can fulfill customers’ requirement,
then we will enter the information to our ERP sytem for calculationg the price.
For urgent enquiry,we can get the cost with 24 hours,
usually it will be forty eight several hours.

2.Patern Generating

We have our own picket sample generating workshop.
But our business is usually busy,
we also have close to 10 sub-contractors for pattern making.
They aid us for the pattern but will be inspected according to our guidelines.
We will record for every single pattern inspection.

three.Sand Core Making

We have about eighty technicans for sand main producing which is divided into around ten groups.
Most of the technicans has a lot more than 10 years’ knowledge.

Most of the sand main is produced by silica sand with frequent sand inside of it.
The common sand will be employed repeatly.
For some critical place,these kinds of as R corner,we will use chorme ore sand.

The exterior of the sand core,we will do the portray,burn up and clear it.

We will assemble diffrent sand cores with each other and wait for pouring.

four.Meltinig and Pouring
We constantly do the melting after mid-night for less expensive electric charge.
And we usually do pouring in the early early morning.

No. Equipment Identify Quantity(Established)
1 25 tons Electrical Arc Furnace one
2 50 tons Intermediate Frequency Furnace two
three 120 tons Refining Furnace 1
4 a hundred and twenty tons VD Furnace 2

5.Cooling
When we do pouring,we will also examine the chemical compositon.

Right after pouring,we will wait for diverse time for cooling according to casting’s weight.

Merchandise Fat in blank(Metric Tons) Cooling Time(Hour)
1 <25 48
2 >25-forty seventy two
3 >40-fifty five ninety six
four >55-seventy two 120
5 >72-96 144
six >96-one hundred fifteen 168
seven >115 192

6.Heat therapy

The optimum dimensions of the warmth treatment method CZPT is 12m*9m*6m.
The dimension also make a decision the max. dimensions we can make for the casting.

We only can do normalizing and tempering.
The quenching CZPT will be accomplished by our sub-contactor.

Cutting the riser,we select thermal slicing approach.

After warmth treatment,we will do the mechanical property test.

seven.Attract the Line and Very first Rough Machining


8.To begin with NDT soon after Rough Machining

nine.Welding Repair
We have abundant knowledge for making help roller,
then there is no welding for the exterior functioning position.
This is our unique technology.

But for some other castings,if we do the welding repair,
we will do the tempering for anxiety relief later on.

All of our welders have the SGS certficate.

ten.Final Machining
We have a good deal of vertical lathes from 2.5m to 10m.

Certifications

We get acceptance from CNAS for our laboratory.
We also have 9 course certification,this sort of as Abs,DNV,NK,RINA,KR,CCS,BV and so on.

Packaging & Delivery

We do the packing by ourself with some iron support.

After Income Services

Normally the customers will arrive and examine the goods ahead of cargo.

Or the top quality for castings following tough machining is alright,
but locate some problems when the clients do the ultimate machining,
we will verify what the dilemma is in accordance to customers’ comments.
 

 

 

 

US $2,000-3,000
/ Ton
|
20 Tons

(Min. Order)

###

Type: Chemical Hardening Sand
Casting Method: Directional Crystallization
Sand Core Type: Sodium Silicate Sand Core
Application: Machinery Parts
Machining: Boring Machine
Material: Steel

###

Samples:
US$ 20/kg
1 kg(Min.Order)

|
Request Sample

###

Customization:

###

Material C Si Mn P S Cr Mo
ZG42CrMo 0.38-0.43 0.15-0.35 0.75-1.00 ≤0.035 ≤0.035 0.80-1.10 0.15-0.25

###

GB ISO ASTM JIS EN GOST
ZG42CrMo 42CrMo4 4140 SCM440 EN42CrMo4 38XM

###

Item Standard
Casting Material EN 10293/EN 10025/BS 3100/DIN 1681/DIN17205
Casting Tolerance in Blank ISO 8062 CT 13
Size Tolerance DIN ISO 2768m
NDT ASTM A609 Level 2 or 3 /EN 12680/ASTM E94 Level 2 or 3
Heat Treatment Normalizing+Tempering+Quenching
Hardness As Required

###

No. Equipment Name Quantity(Set)
1 25 tons Electrical Arc Furnace 1
2 50 tons Intermediate Frequency Furnace 2
3 120 tons Refining Furnace 1
4 120 tons VD Furnace 2

###

Item Weight in blank(Metric Tons) Cooling Time(Hour)
1 <25 48
2 >25-40 72
3 >40-55 96
4 >55-72 120
5 >72-96 144
6 >96-115 168
7 >115 192
US $2,000-3,000
/ Ton
|
20 Tons

(Min. Order)

###

Type: Chemical Hardening Sand
Casting Method: Directional Crystallization
Sand Core Type: Sodium Silicate Sand Core
Application: Machinery Parts
Machining: Boring Machine
Material: Steel

###

Samples:
US$ 20/kg
1 kg(Min.Order)

|
Request Sample

###

Customization:

###

Material C Si Mn P S Cr Mo
ZG42CrMo 0.38-0.43 0.15-0.35 0.75-1.00 ≤0.035 ≤0.035 0.80-1.10 0.15-0.25

###

GB ISO ASTM JIS EN GOST
ZG42CrMo 42CrMo4 4140 SCM440 EN42CrMo4 38XM

###

Item Standard
Casting Material EN 10293/EN 10025/BS 3100/DIN 1681/DIN17205
Casting Tolerance in Blank ISO 8062 CT 13
Size Tolerance DIN ISO 2768m
NDT ASTM A609 Level 2 or 3 /EN 12680/ASTM E94 Level 2 or 3
Heat Treatment Normalizing+Tempering+Quenching
Hardness As Required

###

No. Equipment Name Quantity(Set)
1 25 tons Electrical Arc Furnace 1
2 50 tons Intermediate Frequency Furnace 2
3 120 tons Refining Furnace 1
4 120 tons VD Furnace 2

###

Item Weight in blank(Metric Tons) Cooling Time(Hour)
1 <25 48
2 >25-40 72
3 >40-55 96
4 >55-72 120
5 >72-96 144
6 >96-115 168
7 >115 192

Hypoid Bevel Vs Straight Spiral Bevel – What’s the Difference?

Spiral gears come in many different varieties, but there is a fundamental difference between a Hypoid bevel gear and a Straight spiral bevel. This article will describe the differences between the two types of gears and discuss their use. Whether the gears are used in industrial applications or at home, it is vital to understand what each type does and why it is important. Ultimately, your final product will depend on these differences.
Gear

Hypoid bevel gears

In automotive use, hypoid bevel gears are used in the differential, which allows the wheels to rotate at different speeds while maintaining the vehicle’s handling. This gearbox assembly consists of a ring gear and pinion mounted on a carrier with other bevel gears. These gears are also widely used in heavy equipment, auxiliary units, and the aviation industry. Listed below are some common applications of hypoid bevel gears.
For automotive applications, hypoid gears are commonly used in rear axles, especially on large trucks. Their distinctive shape allows the driveshaft to be located deeper in the vehicle, thus lowering the center of gravity and minimizing interior disruption. This design makes the hypoid gearset one of the most efficient types of gearboxes on the market. In addition to their superior efficiency, hypoid gears are very easy to maintain, as their mesh is based on sliding action.
The face-hobbed hypoid gears have a characteristic epicycloidal lead curve along their lengthwise axis. The most common grinding method for hypoid gears is the Semi-Completing process, which uses a cup-shaped grinding wheel to replace the lead curve with a circular arc. However, this method has a significant drawback – it produces non-uniform stock removal. Furthermore, the grinding wheel cannot finish all the surface of the tooth.
The advantages of a hypoid gear over a spiral bevel gear include a higher contact ratio and a higher transmission torque. These gears are primarily used in automobile drive systems, where the ratio of a single pair of hypoid gears is the highest. The hypoid gear can be heat-treated to increase durability and reduce friction, making it an ideal choice for applications where speed and efficiency are critical.
The same technique used in spiral bevel gears can also be used for hypoid bevel gears. This machining technique involves two-cut roughing followed by one-cut finishing. The pitch diameter of hypoid gears is up to 2500 mm. It is possible to combine the roughing and finishing operations using the same cutter, but the two-cut machining process is recommended for hypoid gears.
The advantages of hypoid gearing over spiral bevel gears are primarily based on precision. Using a hypoid gear with only three arc minutes of backlash is more efficient than a spiral bevel gear that requires six arc minutes of backlash. This makes hypoid gears a more viable choice in the motion control market. However, some people may argue that hypoid gears are not practical for automobile assemblies.
Hypoid gears have a unique shape – a cone that has teeth that are not parallel. Their pitch surface consists of two surfaces – a conical surface and a line-contacting surface of revolution. An inscribed cone is a common substitute for the line-contact surface of hypoid bevel gears, and it features point-contacts instead of lines. Developed in the early 1920s, hypoid bevel gears are still used in heavy truck drive trains. As they grow in popularity, they are also seeing increasing use in the industrial power transmission and motion control industries.
Gear

Straight spiral bevel gears

There are many differences between spiral bevel gears and the traditional, non-spiral types. Spiral bevel gears are always crowned and never conjugated, which limits the distribution of contact stress. The helical shape of the bevel gear is also a factor of design, as is its length. The helical shape has a large number of advantages, however. Listed below are a few of them.
Spiral bevel gears are generally available in pitches ranging from 1.5 to 2500 mm. They are highly efficient and are also available in a wide range of tooth and module combinations. Spiral bevel gears are extremely accurate and durable, and have low helix angles. These properties make them excellent for precision applications. However, some gears are not suitable for all applications. Therefore, you should consider the type of bevel gear you need before purchasing.
Compared to helical gears, straight bevel gears are easier to manufacture. The earliest method used to manufacture these gears was the use of a planer with an indexing head. However, with the development of modern manufacturing processes such as the Revacycle and Coniflex systems, manufacturers have been able to produce these gears more efficiently. Some of these gears are used in windup alarm clocks, washing machines, and screwdrivers. However, they are particularly noisy and are not suitable for automobile use.
A straight bevel gear is the most common type of bevel gear, while a spiral bevel gear has concave teeth. This curved design produces a greater amount of torque and axial thrust than a straight bevel gear. Straight teeth can increase the risk of breaking and overheating equipment and are more prone to breakage. Spiral bevel gears are also more durable and last longer than helical gears.
Spiral and hypoid bevel gears are used for applications with high peripheral speeds and require very low friction. They are recommended for applications where noise levels are essential. Hypoid gears are suitable for applications where they can transmit high torque, although the helical-spiral design is less effective for braking. For this reason, spiral bevel gears and hypoids are generally more expensive. If you are planning to buy a new gear, it is important to know which one will be suitable for the application.
Spiral bevel gears are more expensive than standard bevel gears, and their design is more complex than that of the spiral bevel gear. However, they have the advantage of being simpler to manufacture and are less likely to produce excessive noise and vibration. They also have less teeth to grind, which means that they are not as noisy as the spiral bevel gears. The main benefit of this design is their simplicity, as they can be produced in pairs, which saves money and time.
In most applications, spiral bevel gears have advantages over their straight counterparts. They provide more evenly distributed tooth loads and carry more load without surface fatigue. The spiral angle of the teeth also affects thrust loading. It is possible to make a straight spiral bevel gear with two helical axes, but the difference is the amount of thrust that is applied to each individual tooth. In addition to being stronger, the spiral angle provides the same efficiency as the straight spiral gear.
Gear

Hypoid gears

The primary application of hypoid gearboxes is in the automotive industry. They are typically found on the rear axles of passenger cars. The name is derived from the left-hand spiral angle of the pinion and the right-hand spiral angle of the crown. Hypoid gears also benefit from an offset center of gravity, which reduces the interior space of cars. Hypoid gears are also used in heavy trucks and buses, where they can improve fuel efficiency.
The hypoid and spiral bevel gears can be produced by face-hobbing, a process that produces highly accurate and smooth-surfaced parts. This process enables precise flank surfaces and pre-designed ease-off topographies. These processes also enhance the mechanical resistance of the gears by 15 to 20%. Additionally, they can reduce noise and improve mechanical efficiency. In commercial applications, hypoid gears are ideal for ensuring quiet operation.
Conjugated design enables the production of hypoid gearsets with length or profile crowning. Its characteristic makes the gearset insensitive to inaccuracies in the gear housing and load deflections. In addition, crowning allows the manufacturer to adjust the operating displacements to achieve the desired results. These advantages make hypoid gear sets a desirable option for many industries. So, what are the advantages of hypoid gears in spiral gears?
The design of a hypoid gear is similar to that of a conventional bevel gear. Its pitch surfaces are hyperbolic, rather than conical, and the teeth are helical. This configuration also allows the pinion to be larger than an equivalent bevel pinion. The overall design of the hypoid gear allows for large diameter shafts and a large pinion. It can be considered a cross between a bevel gear and a worm drive.
In passenger vehicles, hypoid gears are almost universal. Their smoother operation, increased pinion strength, and reduced weight make them a desirable choice for many vehicle applications. And, a lower vehicle body also lowers the vehicle’s body. These advantages made all major car manufacturers convert to hypoid drive axles. It is worth noting that they are less efficient than their bevel gear counterparts.
The most basic design characteristic of a hypoid gear is that it carries out line contact in the entire area of engagement. In other words, if a pinion and a ring gear rotate with an angular increment, line contact is maintained throughout their entire engagement area. The resulting transmission ratio is equal to the angular increments of the pinion and ring gear. Therefore, hypoid gears are also known as helical gears.

China SGS Certificated Half Gear by Sand Casting     worm gearboxChina SGS Certificated Half Gear by Sand Casting     worm gearbox
editor by czh 2023-01-12