What brands do gantry cranes generally have? What proposal?

At present, there are four famous factories in China, and the prices are not low, so the value of a single brand is better. Just grab anyone around you and you'll know

As for the quotation, it is determined by the following factors.

The service factor (design) of 1 only uses two kinds of portal cranes that have been working for more than 6 years, and the cost of the latter is generally estimated to be 30% ~ 45% higher.

Note: this element demand is the last word.

2 There are 19 processes for process elements (production), and the cost difference (working hours) of the most critical four processes is almost 800%.

Example (1): A 280X400X 1200 boring 5-hole gear box must be installed on the boring machine according to high standards, ensuring coaxiality and parallelism, and the hole error is within +0.05, requiring one-time clamping. Generally, a cot can't handle it. Through this process, the 800 yuan is not less than 160/ hole element and 5 holes. However, if the standard is lowered to +-0. 1mm, the cost is only 50 ~ 60/ hole element, which is more than 240. The roughest thing is to measure the whole hole with a tape measure. Welding a set of 5 yuan money 150 yuan, find a welder to produce a pile a day, and a gearbox costs tens of yuan.

Example (2): Take the simplest painting as an example. Catch a handyman on the roadside and spray only one low-grade primer, with a lump sum price of 30-40 yuan/ton. If two people cooperate properly, they can get 80- 100 tons in three or four days. The cost of painting will never exceed 80 yuan/ton. If the normal procedures are followed for rust removal, slag removal and repair, the 200 yuan/ton will not come down, and the paint will be close to 230/ ton.

Note: This factor is the most invisible price factor. You can steal tens of thousands of dollars just by stealing some works. However, this factor directly affects the later use, as well as biting, tooth loss, rail jumping and so on. Is the root cause of this decline. Indirectly, the accessories are not durable, which will cause a lot of maintenance and repeated maintenance. /kloc-I saw a 65438+100000+100000 gantry crane repaired in 0/2 months. This is absolutely correct. If you don't believe me, I can take him to see it (I didn't do it, forget it).

3 Accessories factor (procurement), now counting from bottom to top, there are 10 kinds of accessories, such as wheels, shafts, bearings, reducers, brake motors, pulley blocks, wire ropes, winches, wiring, power distribution, etc. Any part of the attachment may cause a door crane accident. But in reality, the accessories calculated by 10 thousand yuan are very different, and you don't need a pair of eyes. The price difference ranges from 30% to 250%.

Example (1): The cost of an 8T hoist is 1.86 million yuan to 36,000 yuan, including steel shell and cast iron shell, 6-stage motor and 8-stage motor, from the smallest 1.4 kW to the largest 24kw. Even if it is the same product, such as the configuration of nailing the 8-grade steel shell of 24kw motor, he can still play some tricks on the varistor distribution box and even the base. Conclusion Products with the same configuration, different manufacturers, different agents and different sales (agency policies) can all lead to price differences.

Column (2): Since it is impossible to write all of them, I will tell you the simplest one. Screws on the door crane. Generally speaking, high-strength bolts above 8.8 are needed. In fact, many manufacturers are fooling. The key position is 8.8, and the next key position is changed to 4.8 ordinary bolts. In order to save a few cents, he just can't see the major events that affect production and use. Even if he doesn't pursue the loss, it won't cost more than a few hundred yuan to find a few workers to replace the screws. There is another important point: I have nearly 10 different quotations from 2.4 yuan to 12.5 yuan for a bolt with L=80 M20 and grade 8.8. Are the highest and lowest equal to scores?

Description: This factor is the most complicated in the cost, with the largest water content, which is also the most unfavorable to customers. In the final analysis, the accessory factor is the most chaotic in the cost, the barrel effect is the most serious, and the user is the most vulnerable. They are one of the security problems, the chief culprit of use interruption, and the big boss of maintenance cost in use. To put it bluntly, not all cars with 6-liter engines are called Mercedes-Benz 600. The performance of door crane accessories is more reflected in matching, matching and overall performance. There are 10 kinds of accessories, and none of them can be ignored.

4 Material factor (supply): The main materials of the portal crane are plates, profiles, wires and pipes, and Q235B, 16Mn, 45# 20# 55# are commonly used in quality. A gantry crane shall use at least 17 materials and at most 24 materials. Relatively speaking, the price of materials is transparent, and the price difference caused by material factors is the smallest within 20%. But you can't do it without experience.

For example, the same material is Q235B, and the price difference between large and small factories is about 1 1,000/ton, but the yield strength of large factory is 235, and I have only tested it in small factory at 1 1,90 points. The difference between national standard and non-standard price of the same manufacturer is 300 yuan/ton. Seamless pipe, invisible seamless pipe (invisible welded pipe), spiral welded pipe, straight welded pipe, the price difference between the first two and the last two is not big, but the price difference between the first and the last two is 1400/ ton, not to mention the performance. Note that criminals use invisible pipes as seamless pipes and fluid (20#) pipes as high-pressure (45#) pipes. At first glance, the typing board and the opening board must be separated, and the price difference is 100 ~ 200. According to years of experience, we should make good materials, but we should also pay attention to them. Angang is used for profiles, Liugang is used for thick plates over 60, Kungang is used for thin plates, and Chengdu is used for seamless pipes. Let's not talk about the reason. That's the man I eat.

Note: this factor is the most transparent in the quotation, but it is also the most difficult for customers to understand and the smallest price difference. It is also the simplest procurement task, which can be completed only by accumulating some experience and being careful when inspecting goods.

I wonder if the above rough answer is clear. For more information, please email me at13888155828 @163.com, and I can explain it in detail. If you want to listen, I can start with a 7-cent pulley. All the main materials, auxiliary materials, accessories and labor make up nearly one million gantry cranes.