Solution Description

 

 

 

ZheJiang Xihu (West Lake) Dis.g Metallic Products Co.,Ltd is a personal enterprise specialised in the study & growth and generation of steel goods. It is positioned in Xihu (West Lake) Dis. County, ZheJiang , which is often popular as “Electronic and Components hometown of China”. Its west is subsequent to ZheJiang -ZheJiang higher-speed railway and ZheJiang -ZheJiang Expressway, and east is up coming to HangZhou Port, north is in close proximity to to ZheJiang and ZheJiang , south is borded on Shangdong province, with handy transportation and excellent surroundings.

It was formerly identified as Heibei Xihu (West Lake) Dis.g Group, which has been engaged in the metal solution market for over thirty many years. The company is currently a massive scale of stamping manufacturing business with 200 million set asset, land of one hundred fifty mu, more than three hundred workers.

 

 

Q: Are you trading company or manufacturer ?

A: We are a personalized manufacturing facility.

Q: How extended is your delivery time?

A: Usually it is fifteen-twenty days for samples and 25-thirty days for mass generation, it is according to quantity.

Q: Do you offer samples ? is it free or extra ?

A: Sure, we could offer you the sample for free of charge cost but do not shell out the expense of freight.

Q: How do you ship the merchandise?

A: We have our cooperation forwarder, they can produce the products to you in really quick time with competitive price, and you can ship by your personal agent as your usefulness.

Q: What is your phrases of payment ?

A: Payment<=1000USD, 100% in advance. 

     Payment>=1000USD, thirty% T/T + 50% Mould Costs in advance, harmony just before shippment.
B: FOB ZheJiang /ZheJiang . Or EXW, CIF, DUU, And many others

Q1. Are you manufacturing facility or buying and selling company? 

A: We are a personalized manufacturing unit.

Q2.Can you provide sample for us? 
A: Sure, free of charge sample is obtainable

Q3. What uncooked materials do you use? 
A: stainless steel, carbon steel, mild steel, galvanized metal, aluminum alloy, brass, copper, and many others.

Q4. What finishes can you supply?
A: powder coating, sprucing, zinc/nickel /chrome plating, portray, anodized,scorching dip galvanized,

sandblasted, and so on.

Q5. How do you make sure good quality management? 
A: First of all, Our company is aiming to keep away from any issues ahead of the production. So we will

verify each and every detailes prior to the quotation. When the order is verified, we will also re-confirm

all the detailes with the consumer. Only by this way, we can stay away from the problems and conserve the expense

for us. 

Next,Our business has a stringent requirment for our suppliers on the high quality control. They need to be

performed in accordance to ISO9001:2008 Normal. This kind of as Original sample examination, very last sample examination, Random

check, and so forth.

Q6. Is small quantity available?
A: Of course, Small amount for demo purchase is available. 

Q7. How do you ship the products?
A: We have our cooperation forwarder, they can provide the products to you in really short time with

competitive cost, and you can ship by your own agent as your convenience.

Q8. How about your shipping and delivery time ? 
A: 15 days for samples and 25-fifty days for mass production.

 

Item	Best sale steel stamping parts with low price from China OEM  manufacturer
Moould	Based drawings or samples designed our own factory
Processing	Drawing confirm both technical department-Purchase Material- Material Check-Shearing Material CNC Laser Cutting/Flame Cutting/Punching/Stamping/Pressing-Folding/Bending-welding-CNC Machining/Drilling-Welding-Spray Coating-Assembling-Quality Check-Packing-Storage
Surface	Polishing, oxidating, zinc, nickel plated, powder coating , chrome plating, electrophoresis or special requested
Delivery	Shipment:By sea or by air; Delivery date:According to specific orders, usually within 15-30 days after confirmed with drawings and receiving 30% down payment
Payment	Mass Production:T/T 30% in advance, T/T 70% before shipment. Mould: 30% in Advance+70% before mass production. After certain quantity,will refund

Item	Best sale steel stamping parts with low price from China OEM  manufacturer
Moould	Based drawings or samples designed our own factory
Processing	Drawing confirm both technical department-Purchase Material- Material Check-Shearing Material CNC Laser Cutting/Flame Cutting/Punching/Stamping/Pressing-Folding/Bending-welding-CNC Machining/Drilling-Welding-Spray Coating-Assembling-Quality Check-Packing-Storage
Surface	Polishing, oxidating, zinc, nickel plated, powder coating , chrome plating, electrophoresis or special requested
Delivery	Shipment:By sea or by air; Delivery date:According to specific orders, usually within 15-30 days after confirmed with drawings and receiving 30% down payment
Payment	Mass Production:T/T 30% in advance, T/T 70% before shipment. Mould: 30% in Advance+70% before mass production. After certain quantity,will refund

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 four 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 two 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 one worm gear to another, so it is important to check the backlash at several points. If the backlash is different in two 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 one 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 one 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.