Product Description
**What we can do?**
HangZhou Botai Auto arts Co., Ltd. is a modern industrial manufacturer mainly engaged in the production of parts required for automobiles, trucks, machine tools, trains and other mechanical equipment. We have a variety of casting processes such as Iron based coated sand, Coated sand, Coated sand, Clay sand, Resin sand, investment casting, lost-foam casting, negative pressure casting, die casting etc. At the same time, we have a complete modern production line from raw material melting to finished product.
**Description of casting products**
| Specification | According to customer’s drawing or sample. | |
| Casting Weight | 0.1KG-3Tons | |
| Casting Standard | ISO ,DIN, AISI, ASTM, BS, JIS, etc. | |
| Casting Tolerance | CT7-CT8. | |
| Surface Roughness | Ra0.05-Ra50. | |
| Heat Treatment | Normalizing, Annealing, Quenching, Tempering, etc. | |
| Casting Material | High grade ductile iron(QT1050-6)/(QT800-5)/(QT600-5), Grey iron, Stainless steel, Carbon steel. | |
| Casting Process | Sand Casting | Iron based coated sand |
| Coated sand | ||
| Clay sand | ||
| Resin sand | ||
| Investment Casting | ||
| Lost Foam Casting | ||
| Vacuum process casting | ||
| Surface Preparation | Sand Blasting, Plating, Galvanized, Spray-Paint, Passivating,Polishing,Electrophoresis, ,Machining,etc. | |
| Inspection Equipment | Test equipment: Spectrum Analyzer, Hexagon CMM, Hardness test equipment, Tension test machine, E-coating testing equipments, Metalloscope. | |
| Dimension Inspection | Coordinate Measuring Machine (CMM),Calipers, Height Gauge, Micrometer Calipers, Inside Caliper Gauge, Angle and R Gauge,customized gauge, etc. | |
| Product application | Our products are widely used in many industries, such as automobile, truck, train, railway, fitness equipment, agricultural machinery, mining machinery, petroleum machinery, engineering machinery, shipbuilding, construction and other power equipment. | |
| Sample production cycle | 30-45 Working days. | |
**Botai’s comparative advantage**
1* Mature one-stop service system.
Botai provides real one-stop service for all customers
(1)we are the source manufacturers, and our price has an absolute advantage.
(2)We have our own technology department to solve all-round problems related to product technology.
(3)We have a complete production line, products from raw materials to finished products are under our control.
(4)We have a strict product quality monitoring system to ensure the quality of our products and after-sales service.
2* Modern machinery and patented equipment.
Botai has more than 30 kinds of mechanical equipment related to casting, grinding, processing, surface treatment, etc., more than 400 sets in total, including 60 sets of four-axis machining center (CNC) and 2 sets of digital special machines designed with double main axle boxes. Our equipment has significantly improved production efficiency and product quality.
3* Sufficient production capacity.
Botai supplies more than 40000 tons of goods to more than 10 companies in 2019. Under the supervision of a production system, CZPT not only ensures sufficient supply capacity, but also achieves 98% delivery efficiency.
4* Modern laboratory.
Every process of each batch of products from raw materials to finished products will be tested in the laboratory to ensure that the quality of each batch of products is up to the standard. For example, we will carry out spectral inspection for each batch of raw material samples, and carry out tensile test for specific products through tensile machine to ensure the tensile strength of products, etc.
5* Wide application of products
The castings produced by CZPT are widely used in various industries,such as construction vehicles, trains, railways, forklifts, agricultural machinery and other mechanical equipment.We can produce all kinds of castings according to customer’s drawings and customer’s requirements.
6* Perfect product information tracking
After the product is inspected in terms of quality, we will record the products produced by different batches of raw materials and archive the production information of each batch of products, each of our products is marked with raw material batch number and factory production code. Our purpose is to find the root of the problem accurately when the customer has the demand for product quality and after-sales, and find the same batch of products to ensure that these products are free of problems.
**Botai’s cooperative partner**
Botai has developed rapidly since its establishment in 2013, and now has an annual sales volume of US $80 million, and has formed a good and long-term cooperation relationship with customers. In 2019, we supply 70% of the castings for China First Auto Work in HangZhou.
**Botai’s corporate honor**
**FAQ**
1.Are you a factory or trading company? Do you have an advantage in price?
First of all, CZPT is a casting manufacturer. We provide real one-stop service. The products purchased by customers are directly produced by our factory. Therefore, the price of our products has been reduced by 5% to 10% of the trade cost. Our price is absolutely superior.
2.How can you guarantee delivery on time.
Before each new order, each department will hold a meeting to make a strict production plan, implement the supply of raw materials, distribution of production plan and other matters. In addition, the cooperation between us and large companies has also promoted the improvement of our delivery system.
3.How do you guarantee the quality of your products?
First of all, we will carry out quality inspection on the raw materials of the products and ensure that they are qualified. Then we will carry out necessary test and inspection during the production of the products. On the other hand, 70% of the truck castings of China First Auto Work HangZhou branch are produced by Botai, which further proves the quality of our products.
4.How can we quote for you?
Please send us enquiry by email, with all the technical drawings you have. Such as material grade, tolerance, machining demands, surface treatment, heat treatment, mechanical property requirements, etc. Our specialized engineer will check and quote for you, we would appreciate the opportunity and will respond in 3-5 working days or less.
5. Which industries do the purchased products apply to?
We are a professional OEM manufacturer. Our products are widely used in forklift, truck, train ,machinery, mining, construction, food and other industries. As long as there is a demand for spare parts, we can process it for production.
How to Choose the Right Worm Shaft
You might be curious to know how to choose the right Worm Shaft. In this article, you will learn about worm modules with the same pitch diameter, Double-thread worm gears, and Self-locking worm drive. Once you have chosen the proper Worm Shaft, you will find it easier to use the equipment in your home. There are many advantages to selecting the right Worm Shaft. Read on to learn more.
Concave shape
The concave shape of a worm’s shaft is an important characteristic for the design of a worm gearing. Worm gearings can be found in a wide range of shapes, and the basic profile parameters are available in professional and firm literature. These parameters are used in geometry calculations, and a selection of the right worm gearing for a particular application can be based on these requirements.
The thread profile of a worm is defined by the tangent to the axis of its main cylinder. The teeth are shaped in a straight line with a slightly concave shape along the sides. It resembles a helical gear, and the profile of the worm itself is straight. This type of gearing is often used when the number of teeth is greater than a certain limit.
The geometry of a worm gear depends on the type and manufacturer. In the earliest days, worms were made similar to simple screw threads, and could be chased on a lathe. During this time, the worm was often made with straight-sided tools to produce threads in the acme plane. Later, grinding techniques improved the thread finish and reduced distortions resulting from hardening.
When a worm gearing has multiple teeth, the pitch angle is a key parameter. A greater pitch angle increases efficiency. If you want to increase the pitch angle without increasing the number of teeth, you can replace a worm pair with a different number of thread starts. The helix angle must increase while the center distance remains constant. A higher pitch angle, however, is almost never used for power transmissions.
The minimum number of gear teeth depends on the angle of pressure at zero gearing correction. The diameter of the worm is d1, and is based on a known module value, mx or mn. Generally, larger values of m are assigned to larger modules. And a smaller number of teeth is called a low pitch angle. In case of a low pitch angle, spiral gearing is used. The pitch angle of the worm gear is smaller than 10 degrees.
Multiple-thread worms
Multi-thread worms can be divided into sets of one, two, or 4 threads. The ratio is determined by the number of threads on each set and the number of teeth on the apparatus. The most common worm thread counts are 1,2,4, and 6. To find out how many threads you have, count the start and end of each thread and divide by two. Using this method, you will get the correct thread count every time.
The tangent plane of a worm’s pitch profile changes as the worm moves lengthwise along the thread. The lead angle is greatest at the throat, and decreases on both sides. The curvature radius r” varies proportionally with the worm’s radius, or pitch angle at the considered point. Hence, the worm leads angle, r, is increased with decreased inclination and decreases with increasing inclination.
Multi-thread worms are characterized by a constant leverage between the gear surface and the worm threads. The ratio of worm-tooth surfaces to the worm’s length varies, which enables the wormgear to be adjusted in the same direction. To optimize the gear contact between the worm and gear, the tangent relationship between the 2 surfaces is optimal.
The efficiency of worm gear drives is largely dependent on the helix angle of the worm. Multiple thread worms can improve the efficiency of the worm gear drive by as much as 25 to 50% compared to single-thread worms. Worm gears are made of bronze, which reduces friction and heat on the worm’s teeth. A specialized machine can cut the worm gears for maximum efficiency.
Double-thread worm gears
In many different applications, worm gears are used to drive a worm wheel. These gears are unique in that the worm cannot be reversed by the power applied to the worm wheel. Because of their self-locking properties, they can be used to prevent reversing motion, although this is not a dependable function. Applications for worm gears include hoisting equipment, elevators, chain blocks, fishing reels, and automotive power steering. Because of their compact size, these gears are often used in applications with limited space.
Worm sets typically exhibit more wear than other types of gears, and this means that they require more limited contact patterns in new parts. Worm wheel teeth are concave, making it difficult to measure tooth thickness with pins, balls, and gear tooth calipers. To measure tooth thickness, however, you can measure backlash, a measurement of the spacing between teeth in a gear. Backlash can vary from 1 worm gear to another, so it is important to check the backlash at several points. If the backlash is different in 2 places, this indicates that the teeth may have different spacing.
Single-thread worm gears provide high speed reduction but lower efficiency. A multi-thread worm gear can provide high efficiency and high speed, but this comes with a trade-off in terms of horsepower. However, there are many other applications for worm gears. In addition to heavy-duty applications, they are often used in light-duty gearboxes for a variety of functions. When used in conjunction with double-thread worms, they allow for a substantial speed reduction in 1 step.
Stainless-steel worm gears can be used in damp environments. The worm gear is not susceptible to rust and is ideal for wet and damp environments. The worm wheel’s smooth surfaces make cleaning them easy. However, they do require lubricants. The most common lubricant for worm gears is mineral oil. This lubricant is designed to protect the worm drive.
Self-locking worm drive
A self-locking worm drive prevents the platform from moving backward when the motor stops. A dynamic self-locking worm drive is also possible but does not include a holding brake. This type of self-locking worm drive is not susceptible to vibrations, but may rattle if released. In addition, it may require an additional brake to keep the platform from moving. A positive brake may be necessary for safety.
A self-locking worm drive does not allow for the interchangeability of the driven and driving gears. This is unlike spur gear trains that allow both to interchange positions. In a self-locking worm drive, the driving gear is always engaged and the driven gear remains stationary. The drive mechanism locks automatically when the worm is operated in the wrong manner. Several sources of information on self-locking worm gears include the Machinery’s Handbook.
A self-locking worm drive is not difficult to build and has a great mechanical advantage. In fact, the output of a self-locking worm drive cannot be backdriven by the input shaft. DIYers can build a self-locking worm drive by modifying threaded rods and off-the-shelf gears. However, it is easier to make a ratchet and pawl mechanism, and is significantly less expensive. However, it is important to understand that you can only drive 1 worm at a time.
Another advantage of a self-locking worm drive is the fact that it is not possible to interchange the input and output shafts. This is a major benefit of using such a mechanism, as you can achieve high gear reduction without increasing the size of the gear box. If you’re thinking about buying a self-locking worm gear for a specific application, consider the following tips to make the right choice.
An enveloping worm gear set is best for applications requiring high accuracy and efficiency, and minimum backlash. Its teeth are shaped differently, and the worm’s threads are modified to increase surface contact. They are more expensive to manufacture than their single-start counterparts, but this type is best for applications where accuracy is crucial. The worm drive is also a great option for heavy trucks because of their large size and high-torque capacity.
