Product Description

Product Parameters

The material is low carbon or alloy steel,such as ZG270-500,ZG42CrMo,ZG35Mn and so on.
 

Material:ZG25CrNiMo

Steel Grade Chemical Composition %
C Si Mn Cr Ni Mo S P
ZG25CrNiMo 0.25-0.30 0.20-0.40 0.70-0.90 0.40-0.70 0.40-0.70 0.15-0.25 <=0.571 <=0.571
ZG30CrMo 0.26-0.33 0.17-0.37 0.40-0.70 0.80-1.10 0.15-0.25 <=0.571 <=0.571
ZG35CrMo 0.32-0.40 0.17-0.37 0.40-0.70 0.80-1.10 0.15-0.25 <=0.571 <=0.571

Standard

 Yield Strength

Rp0.2  /MPa

Tensile Strength

Rb / MPa

Elogation

A / %

Reduction of Area

Z/ %

60K ≥414 ≥586 ≥18 ≥35
75K ≥517 ≥655 ≥18 ≥35
80K 585-660 ≥725 ≥18 ≥35

 

Material C Si Mn P S
ZG270-500 0.32-0.40 0.20-0.52 0.45-0.90 ≤0.035 ≤0.035

 

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

 

Material C Si Mn P S
ZG35Mn 0.30-0.40 0.60-0.80 1.10-1.40 ≤0.035 ≤0.035

It is up to customers’ requirement.
 

Item 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 Level 2 or 3 /EN 12680/ASTM E94 Level 2 or 3
Heat Treatment Normalizing+Tempering+Quenching
Hardness As Required

 

Company Profile

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

In 2007,we moved our factory to Sunzhuang town and now we can supply bigger steel castings with max. weight 45 tons.

In 2011,we built a new sand mold maiking workshop with 120 tons refinining CZPT and the max. weight can be 120 tons.

In 2013,we paid more attenion on the castings for shipbuilding and started to supply marine castings for most of domestic famous shipyards.

From 2013 to 2571,we bought more and more machines to strengthen our ability from rough machining to finished machining.

In 2571,we built another new sand mold making workshop for the quick development of market requirement.

Now we monthly supply 6000 tons different castings for different customers of different industry,such as cement mill,shipubuilding,petroleum machinery,rolling mill,forging press and so on.

Prodcution Process

1)Pattern making

We have our own wooden pattern making workshop.
But our company is always busy,
we also have around 10 sub-contractors for pattern making.
They help us for the pattern but will be inspected according to our rules.
We will record for every pattern inspection.

2)Silica or chorme sand cores
We have around 80 technicans for sand core making which is divided into around 10 teams.
Most of the technicans has more than 10 years’ experience.
Most of the sand core is made by silica sand with common sand inside of it.
The common sand will be used repeatly.
For some important position,such as R corner,we will use chorme ore sand.
The outside of the sand core,we will do the painting,burn and clean it.
We will assemble diffrent sand cores together and wait for pouring.

3)Melting and Pouring

We always do the melting after mid-night for cheaper electric charge.
And we normally do pouring in the early morning.

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

Before and after pouring,we will do the chemical compostion test.

4)Cooling

After pouring,we will wait for different time for cooling according to casting’s weight.

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

We have our experience and rules for cooling time.
After cooling,we will shake the casting out of the steel boxes and clean them.
5)Heat Treatment
Normalizing will be 3 days while tempering is 4 days.
We have around 10 sets of heat treatment furnaces.
The biggest 1 is 12m*9m*6m.
It is also the biggest size of castings we can make.

After heat treatment,we will do the mechanical property test.
Our ordinary test block’s size is 230mm*70mm*50mm.
One casting part will min. have 3 pcs test blocks.
We have our testing center and it is approved by CNAS. 
6)Draw the line and do the first rough machining
We can do the machining from rough to finished machining.

7)NDT after rough machining

8)Welding repair
We have rich experience for making support rollers and kiln tyres,
then there is no welding for the outside working position.
This is our special technology.
Every year we supply around 400pcs kiln tyres,930pcs support roller,170 sets gear( in 2 halves).
But for some other castings,if we do the welding repair,
we will do the tempering for stress relief later.
All of our welders have the SGS certficate.

9)Shot blasting and grinding
We have a robert grinder.
We have a 120 tons rotary shot blasting table. 

10)Final machining
We have a lot of vertical lathes from 2.5m to 10m.

 

Certifications

We get approval from CNAS for our laboratory.
We also have 9 class certificate,such as ABS,DNV,NK,RINA,KR,CCS,BV and so on.

 

Packaging & Shipping

We supply a lot of castings for cement mill,rolling mill,shipbuilding and so on.

We can do the packing according to our rules or according to customers’ requirement.

 

After Sales Service

Normally there is a 12 months quality warantty.

We do at least 3 times NDT:after rough,semi-finished and finished machining.

And also the customer will do the witness during or after finished machining.

If there is also any problem when you receive the castings,
please send us photos and detailed defects,
we will negotiate with you and make a compensation.

A third party inspection before shipment is welcomed.

 

Shipping Cost:

Estimated freight per unit.



To be negotiated|


Freight Cost Calculator

Type: Chemical Hardening Sand
Casting Method: Directional Crystallization
Sand Core Type: Sodium Silicate Sand Core
Samples:
US$ 20/kg
1 kg(Min.Order)

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Customization:
Available

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gear

Benefits and Uses of Miter Gears

If you’ve ever looked into the differences between miter gears, you’re probably wondering how to choose between a Straight toothed and Hypoid one. Before you decide, however, make sure you know about backlash and what it means. Backlash is the difference between the addendum and dedendum, and it prevents jamming of the gears, protects the mating gear surfaces, and allows for thermal expansion during operation.

Spiral bevel gears

Spiral bevel gears are designed to increase efficiency and reduce cost. The spiral shape creates a profile in which the teeth are cut with a slight curve along their length, making them an excellent choice for heavy-duty applications. Spiral bevel gears are also hypoid gears, with no offsets. Their smaller size means that they are more compact than other types of right-angle gears, and they are much quieter than other types of gear.
Spiral bevel gears feature helical teeth arranged in a 90-degree angle. The design features a slight curve to the teeth, which reduces backlash while increasing flexibility. Because they have no offsets, they won’t slip during operation. Spiral bevel gears also have less backlash, making them an excellent choice for high-speed applications. They are also carefully spaced to distribute lubricant over a larger area. They are also very accurate and have a locknut design that prevents them from moving out of alignment.
In addition to the geometric design of bevel gears, CZPT can produce 3D models of spiral bevel gears. This software has gained widespread attention from many companies around the world. In fact, CZPT, a major manufacturer of 5-axis milling machines, recently machined a prototype using a spiral bevel gear model. These results prove that spiral bevel gears can be used in a variety of applications, ranging from precision machining to industrial automation.
Spiral bevel gears are also commonly known as hypoid gears. Hypoid gears differ from spiral bevel gears in that their pitch surface is not at the center of the meshing gear. The benefit of this gear design is that it can handle large loads while maintaining its unique features. They also produce less heat than their bevel counterparts, which can affect the efficiency of nearby components.

Straight toothed miter gears

Miter gears are bevel gears that have a pitch angle of 90 degrees. Their gear ratio is 1:1. Miter gears come in straight and spiral tooth varieties and are available in both commercial and high precision grades. They are a versatile tool for any mechanical application. Below are some benefits and uses of miter gears. A simple explanation of the basic principle of this gear type is given. Read on for more details.
When selecting a miter gear, it is important to choose the right material. Hard faced, high carbon steel is appropriate for applications requiring high load, while nylon and injection molding resins are suitable for lower loads. If a particular gear becomes damaged, it’s advisable to replace the entire set, as they are closely linked in shape. The same goes for spiral-cut miter gears. These geared products should be replaced together for proper operation.
Straight bevel gears are the easiest to manufacture. The earliest method was using an indexing head on a planer. Modern manufacturing methods, such as the Revacycle and Coniflex systems, made the process more efficient. CZPT utilizes these newer manufacturing methods and patented them. However, the traditional straight bevel is still the most common and widely used type. It is the simplest to manufacture and is the cheapest type.
SDP/Si is a popular supplier of high-precision gears. The company produces custom miter gears, as well as standard bevel gears. They also offer black oxide and ground bore and tooth surfaces. These gears can be used for many industrial and mechanical applications. They are available in moderate quantities from stock and in partial sizes upon request. There are also different sizes available for specialized applications.
gear

Hypoid bevel gears

The advantages of using Hypoid bevel and helical gears are obvious. Their high speed, low noise, and long life make them ideal for use in motor vehicles. This type of gear is also becoming increasingly popular in the power transmission and motion control industries. Compared to standard bevel and helical gears, they have a higher capacity for torque and can handle high loads with less noise.
Geometrical dimensioning of bevel/hypoid bevel gears is essential to meet ANSI/AGMA/ISO standards. This article examines a few ways to dimension hypoid bevel and helical gears. First, it discusses the limitations of the common datum surface when dimensioning bevel/helical gear pairs. A straight line can’t be parallel to the flanks of both the gear and the pinion, which is necessary to determine “normal backlash.”
Second, hypoid and helical gears have the same angular pitch, which makes the manufacturing process easier. Hypoid bevel gears are usually made of two gears with equal angular pitches. Then, they are assembled to match one another. This reduces noise and vibration, and increases power density. It is recommended to follow the standard and avoid using gears that have mismatched angular pitches.
Third, hypoid and helical gears differ in the shape of the teeth. They are different from standard gears because the teeth are more elongated. They are similar in appearance to spiral bevel gears and worm gears, but differ in geometry. While helical gears are symmetrical, hypoid bevel gears are non-conical. As a result, they can produce higher gear ratios and torque.

Crown bevel gears

The geometrical design of bevel gears is extremely complex. The relative contact position and flank form deviations affect both the paired gear geometry and the tooth bearing. In addition, paired gears are also subject to process-linked deviations that affect the tooth bearing and backlash. These characteristics require the use of narrow tolerance fields to avoid quality issues and production costs. The relative position of a miter gear depends on the operating parameters, such as the load and speed.
When selecting a crown bevel gear for a miter-gear system, it is important to choose one with the right tooth shape. The teeth of a crown-bevel gear can differ greatly in shape. The radial pitch and diametral pitch cone angles are the most common. The tooth cone angle, or “zerol” angle, is the other important parameter. Crown bevel gears have a wide range of tooth pitches, from flat to spiral.
Crown bevel gears for miter gear are made of high-quality materials. In addition to metal, they can be made of plastic or pre-hardened alloys. The latter are preferred as the material is less expensive and more flexible than steel. Furthermore, crown bevel gears for miter gears are extremely durable, and can withstand extreme conditions. They are often used to replace existing gears that are damaged or worn.
When selecting a crown bevel gear for a miter gear, it is important to know how they relate to each other. This is because the crown bevel gears have a 1:1 speed ratio with a pinion. The same is true for miter gears. When comparing crown bevel gears for miter gears, be sure to understand the radii of the pinion and the ring on the pinion.
gear

Shaft angle requirements for miter gears

Miter gears are used to transmit motion between intersecting shafts at a right angle. Their tooth profile is shaped like the mitre hat worn by a Catholic bishop. Their pitch and number of teeth are also identical. Shaft angle requirements vary depending on the type of application. If the application is for power transmission, miter gears are often used in a differential arrangement. If you’re installing miter gears for power transmission, you should know the mounting angle requirements.
Shaft angle requirements for miter gears vary by design. The most common arrangement is perpendicular, but the axes can be angled to almost any angle. Miter gears are also known for their high precision and high strength. Their helix angles are less than ten degrees. Because the shaft angle requirements for miter gears vary, you should know which type of shaft angle you require before ordering.
To determine the right pitch cone angle, first determine the shaft of the gear you’re designing. This angle is called the pitch cone angle. The angle should be at least 90 degrees for the gear and the pinion. The shaft bearings must also be capable of bearing significant forces. Miter gears must be supported by bearings that can withstand significant forces. Shaft angle requirements for miter gears vary from application to application.
For industrial use, miter gears are usually made of plain carbon steel or alloy steel. Some materials are more durable than others and can withstand higher speeds. For commercial use, noise limitations may be important. The gears may be exposed to harsh environments or heavy machine loads. Some types of gears function with teeth missing. But be sure to know the shaft angle requirements for miter gears before you order one.

China best Cast Half Gear with Pinion for Ball Mill spiral bevel gearChina best Cast Half Gear with Pinion for Ball Mill spiral bevel gear
editor by CX 2023-06-09

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