Veteran drivers know that the bucket is the most widely used work device in excavator operations, and it is also the work component that the excavator bears the most load during the excavation operation. In other words, the reinforcement of the bucket plays a very important role in the normal operation of the excavator. Today, the editor of Kangnai excavator accessories will tell you how to reinforce the excavator bucket.

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　　 An excavator consumes 4-5 buckets in an average of 8 years. Especially in the stone construction environment, the bucket wears faster, so the excavator bucket is a consumable excavator accessory. When the bucket is worn to a certain degree, the excavator master must reinforce the bucket in time to effectively improve its service life.

　　In the process of bucket reinforcement, most excavator masters have misunderstandings. It is generally believed that only a bunch of steel plates need to be welded at will. In fact, such blind reinforcement of the bucket will do more harm than good to the excavator itself. To reinforce the bucket, you need to master scientific reinforcement methods. The following editor will explain to you one by one.

  Reminder

　　 1. Reinforce the bucket of the excavator must be cautious and do not operate blindly;

The manufacturing technology of 　　 excavators has a history of more than one hundred years of development, and the bucket technology is also very mature. In the case of the bucket without excessive wear, a wide range of welding reinforcement plates will destroy the stress of the bucket itself, increase the digging resistance, and sometimes accelerate the wear and cracking of the bucket.

　　 If the bucket is protected in all directions, it will increase the weight of the bucket. A heavy bucket will not only increase the fuel consumption of the equipment, but also work under high load conditions will have a considerable impact on the life of the equipment. Therefore, if the bucket is severely worn, it should be properly reinforced in a targeted manner rather than blindly reinforced.

　　2, attention should be paid to the reinforcement of the bucket of the excavator;

　　A technician with excellent welding skills is required to perform welding to ensure that the welding is firm and effective;

　　Partial welding is carried out to replace the overall welding in the parts that need to be strengthened most, avoiding the decrease of excavator efficiency and the increase of fuel consumption;

　　3. Experience sharing of excavator bucket reinforcement;

Under normal circumstances, the side knife, bottom plate, side plate, and tooth root of the bucket are the places with relatively large wear. Therefore, the degree of wear in these places is regularly observed, and if necessary, these places should be strengthened. .

　　 Tooth root strengthening: It is necessary to strengthen the tooth root mounting plate. In the daily work of the excavator, due to poor strengthening, severe wear will occur at the tooth root, and the bucket teeth will not be able to be installed for a long time. For the reinforcement here, two solutions can be adopted, one is to attach reinforcing ribs, and the other is to pack wear-resistant blocks. It should be noted that the method of attaching reinforcing ribs is simple and economical, but when welding, be careful not to overlap the welding seam of the tooth root, which will affect the welding strength of the tooth root.

Bottom plate reinforcement: The bottom plate is an area with more serious wear and it is also necessary to strengthen the bottom plate. The reinforcing ribs of the bottom plate should be made of hard and wear-resistant long plates as raw materials. The overall shape of the bucket should be protected to avoid affecting the cutting angle. Affect production capacity. Many customers choose discarded chain plates as reinforcement materials. Personally think it is better. It should be noted that the welding of the ribs should follow the welding direction of the original machine ribs and overlap the two plates.

　　 Side board and side reinforcement: The violent wear of the side board will reduce the effective bucket capacity of the bucket and affect the productivity. At the same time, the side knife also has the effect of cutting into the material and protecting the side board, so the bucket needs to be equipped with a side knife. Since the side is not a high wear area, the reinforcement of the side should not be too strong, so as not to affect the overall weight of the bucket.

　　4, maintain good operating habits;

　　The standard operating habits of the excavator master can not only improve work efficiency, but also reduce the wear rate of the bucket and protect the bucket.

　　 To sum up, the correct method must be mastered to reinforce the bucket. Do not weld the reinforcing plate randomly, otherwise it will be too much. Some precautions for strengthening the bucket are introduced here first, hoping to have a

Why doesn't the price of steel products bargain for casting products?

As we all know, steel has been reduced this year, but in the process of continuous price reduction of steel
Why has the price of steel castings and iron castings not changed much?
The main reason is environmental protection! In recent years, due to increased environmental protection efforts, product prices have been frequent
The reason for the upward adjustment of many manufacturers is due to environmental protection, and the cost has increased too fast! Equipment upgrade cost, labor cost
Plus the recent pollution cost and other factors! Therefore, the price of raw materials is reduced in one aspect, and the cost in other aspects increases.
Relative to product prices, the unabated increase is in the process of cleaning up!

 

In recent years, grabbers have been used more and more for unloading on railway carriages, and the demand for grabbers in the railway system has been increasing year by year.

For this reason, Guozhong Changdi closely follows the market demand. Recently, it has successfully won the bid for two GE380H grabbers, and made a major breakthrough in the sales of the railway transportation system.

In order to meet the requirements of the bidding unit, the technical department and the production workshop continuously overcome difficulties and carry out refitting. Considering the heavy loading and unloading tasks of the railway system,

The relevant staff even completed the on-site assembly overnight on the day of the arrival, making the equipment successfully delivered in advance. After a series of strict acceptance,

It has won unanimous praise from customers, laying a solid foundation for the future business expansion of the SINOMACH brand in the railway system

 

The excavator is composed of steel parts and is a large Iron Man. Regarding the problem of abnormal noise in the excavator, many old drivers think this is a harmless problem. In order to catch up with the construction period, they want to wait until the end of the project to deal with it in a unified manner. This is absolutely unworkable, beware of small problems that lead to big problems! Today, Weiwei will take everyone to listen to the problem.

1 Abnormal noise at the connection part of the working device

▊ Check whether the pin shaft is loose and whether the lubrication is in place. If the grease lubrication is not in place, grease should be applied in different positions to make the pin fully lubricated.

2 Abnormal sound of cylinder

▊ Check whether the hydraulic oil level is normal. Insufficient oil level may cause the main pump to be empty and produce abnormal noise during working load. This fault can be eliminated by checking the oil level.

▊ Check whether there are iron filings in the hydraulic oil or whether there are iron filings in the circuit. The iron filings may conflict with the piston rod and cause abnormal noise.

▊ Check whether the piston lock nut in the cylinder is loose and the piston moves back and forth inside. If it is determined that it is an abnormal noise in the oil tank, take it apart and look at it.

3 Abnormal sound in the rotating part

▊ Abnormal sound of rotating large gear ring: abnormal sound when rotating to a fixed position, it means that the large gear ring has abnormal sound.

Check whether the amount of butter in the gear ring is normal; whether there is abrasion and foreign matter in the big gear ring.

▊ Abnormal noise in the rotating part

Abnormal noise of the gearbox: Disassemble and check whether the planetary gears and bearings inside are loose or broken. Rotating motor abnormal noise: disassemble and check whether it is caused by the wear of internal parts.

4 Abnormal sound of pilot system

▊ Abnormal sound of pilot pump

The gap becomes larger after the gear is worn. It is recommended to check whether the pilot pressure is normal.

▊ Abnormal sound of pilot oil pipe

After the gears of the P3 pump are worn out, vibration and abnormal noise are caused due to insufficient oil supply.

5 Abnormal sound of safety lock lever

The possible cause is that the filter element of the oil pipe connection position of the pilot handle is clogged, so the sound is heard. The clogging causes the pilot oil pressure to be insufficient, which affects the opening degree of the multi-way valve core, which causes the action to slow down.

6 Abnormal sound of hydraulic pump

The 8 type machine has a noise reduction design on the hydraulic pump, so the sound will not be too loud, such as abnormal noise:

▊ First check the main pressure, it is best to contact a professional to do the performance test of the hydraulic pump.

▊ Confirm whether the two output oil pipes of the hydraulic pump are severely shaken.

Pay attention to tubing jitter

a. Whether the jitter of the tubing is caused by large pressure changes and instability.

b. The pilot filter element is clogged and should be cleaned frequently to prevent clogging.

c. Check whether the safety solenoid valve switch is abnormally switched.

▊ Confirm whether there is metal powder in the hydraulic oil return filter element inside the oil tank.

If the above three points are normal, check the following aspects:

1 Confirm whether to use genuine hydraulic oil and hydraulic return filter element;

2 Whether the hydraulic oil is seriously polluted, it is necessary to replace the hydraulic oil regularly. The long-life hydraulic oil is usually replaced in 5000 hours. If the working environment is dusty, it needs to be replaced a little earlier. In addition, the excavator for crushing work needs to be replaced every 2000 hours. , Because once the hydraulic oil is contaminated, it is difficult to achieve its due lubrication and protection;

3 The oil path is not smooth, which may be due to insufficient hydraulic oil or blockage of the suction filter element, which damages the hydraulic pump after inhaling air;

4 The installation accuracy of the hydraulic pump is not enough;

5 The regulator and solenoid valve are not working properly, and the swash plate angle of the hydraulic pump cannot be adjusted to the required angle, causing the output flow of the hydraulic pump to not match the required flow, causing abnormal pump noise;

6 Due to irregular operation or overload operation, the impact on the hydraulic system is too large, and the pressure relief valve produces pressure relief sound;

7 Start to work when the heat engine time is insufficient, which will cause the hydraulic oil to have a higher viscosity, affect its fluidity, and cause excessive impact on the pump;

8 Whether the internal plunger of the hydraulic pump is worn or not, it needs to be checked and determined.

7 Abnormal sound of safety lock lever

Abnormal engine n

Therefore, many machine friends want to find bucket teeth that pass the process, quality, and wear resistance. This saves the cost of replacement on the one hand, and saves a lot of replacement time on the other hand. The following editor will give you a detailed introduction on how to select bucket teeth from the aspects of process, material, pores and physical comparison.

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Process manufacturing:
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At present, the best technology on the market is forging bucket teeth. Because of the high density of forging technology, bucket teeth not only have high hardness but also have very good wear resistance. Of course, the price is also a lot more expensive.
The ordinary casting process is clearly distinguished from the forging process bucket teeth in terms of price. Of course, the feedback also has obvious differences in details such as the wear resistance and hardness of the bucket teeth.
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Stoma
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When a knowledgeable old driver first buys a bucket tooth of a certain brand or manufacturer, he will conduct detailed observation and inspection, even cutting. By observing the pores after cutting, you can tell whether the quality of the bucket tooth is too hard.
The pores of castings are generally divided into separating pores, intrusive pores and reverberating pores, and the formation of shrinkage cavities and shrinkage porosity in castings is mostly accompanied by the separation of gas. The pores, shrinkage cavities and shrinkage porosity can be said to be associated .
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To put it simply, bucket teeth processed with good technology and material have very few pores, and you will not see large, spherical or group-shaped pores after cutting. On the contrary, bucket teeth with general manufacturing technology and material.
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Real picture comparison
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Let's make a physical comparison. First, we will select the ones with good craftsmanship, ordinary craftsmanship and slightly worse craftsmanship from the three bucket teeth sold on the market, and we will introduce them in detail:
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High quality: high surface gloss, smooth touch
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Normal: There are bumpy particles on the touch, and the gloss is slightly poor
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Inferior quality: obvious frosted graininess, thick paint
Tooth tip thickness: The tip of high-quality bucket teeth will have a significant thickness difference than that of inferior models, which is why ordinary bucket teeth wear out after a period of time.
Bucket tooth weight: According to the weighing point of view, the weight of inferior bucket teeth is the highest, followed by high-quality models, and the lightest is the ordinary model. It can be seen that although bucket teeth are distinguished by weight to a certain extent, they are not Not 100% accurate! Therefore, when some manufacturers use bucket tooth weight as a gimmick, everyone should pay special attention.
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Tooth replacement cycle
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The construction environment of an excavator directly determines the degree of wear of the bucket teeth and the frequency of replacement. For example, if the excavator is doing earthwork or sandy soil engineering, it is almost the same as replacing it twice a year, because the degree of wear will be much smaller.
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However, if it is a quarry or rock project, the replacement cycle will be much shorter, especially for granite and other hard stones. It is commonplace to replace it once a week. Therefore, the quality of the teeth, the operation method and the construction environment determine the teeth. Replacement time.
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to sum up
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All in all, understanding the manufacturing process of bucket teeth, observing the number of pores on the cutting surface of the bucket teeth, as well as the weight and other details, can judge whether the quality of the bucket teeth is satisfactory. Have you learned?

　　

Excavator stocks in the traditional manufacturing industry failed to attract market attention. However, on December 9th, a record of excavator sales hit a record high, once again allowing the capital market to focus on this industry that is closely related to the macro economy.

　　According to data released by the China Construction Machinery Industry Association, the 25 excavator manufacturers included in the statistics in November 2019 sold 19,316 excavators of various types, a year-on-year increase of 21.7%. The domestic market sold 17,159 units, a year-on-year increase of 21.2%; exports 2,157 units, a year-on-year increase of 25.6%. At the same time, the annual sales of excavators hit a record high again. In the first November of this year, the sales of excavators exceeded 210,000 units, which has surpassed the total sales of 203,000 units last year.

Industry analysts said to China Business News, “At present, the valuations of the top several listed construction machinery companies with better quality are at historically low levels. Combined with policy-based infrastructure investment planning, the sector’s prosperity in the next 1-2 years may be Will be promoted".

　　The industry recovers faster

　　Excavator, a very cyclical industry, is often regarded as the vane of macroeconomic development. In fact, both the machinery sector index and the industry's leading stocks have performed well this year. Wind data shows that since this year, the mechanical index once rose to 5694.72 points, a new high since March 2018. As of now, the index has increased by more than 25% during the year. Looking back on the development of the excavator industry in recent years, the sales volume has gone from peak to fall, and hit a new high this year. According to China Business News, a brokerage machinery industry analyst who did not want to be named, sales of excavators this year hit a record high, following 2016 The performance of the continuation of the post-industry recovery.

"From a long-term perspective, in 2014, excavators entered a period of decline after experiencing rapid sales growth in the previous years. After the introduction of relevant policies in 2015, real estate in third- and fourth-tier cities developed rapidly. And drove the excavator industry to achieve a positive growth rate in April 2016, and the growth rate has been rising since then." The person said. Wind data shows that in December 2017, the sector experienced a single month increase of nearly 90% year-on-year, which was the largest monthly increase in history.　　 The above-mentioned analysts also pointed out that the strengthening of the government's countercyclical policies, the expansion of industry leaders' overseas market share, and the demand for replacement of old machines are also important factors driving the sales of excavators.

　　 The reporter noticed that some research institutions took the service life of the machine as a reference and pointed out that the update of new and old machines is expected to continue to promote the recovery of excavators in 2020.

　　 Dongxing Securities (11.480, 0.20, 1.77%) research report stated that the average number of hours of operation of stock excavators reached 　　8281 hours, and those with more than 8,000 hours of operation accounted for 50% of the stock. At present, the average number of operating hours of second-hand excavators produced in 2011 is 9417.25 hours. If 11,000 hours are used as the average elimination limit of stock excavators, the current work intensity of a single excavator is 1500 hours per year. Used excavators will reach the theoretical elimination value in mid-2020.

In this regard, the aforementioned person believes that “on the whole, the excavator industry itself has a certain degree of resilience. However, the industry is still in the recovery stage. As far as the signs of recovery are concerned, the recovery speed is fast, but it is not enough to conclude that the sector is comprehensive. Getting better."

　　Excavators also look at infrastructure construction. Excavators involve three sub-sectors: infrastructure, real estate, and mining. An analyst pointed out that the upward trend of the infrastructure construction industry has indeed reflected the steady trend of overall economic growth to some extent.

　　 Looking forward to next year, he believes that from the perspective of the long-term economic growth trend, with the strengthening of counter-cyclical adjustments, infrastructure may continue to make efforts to drive the demand for construction machinery to maintain growth.

"Excavators must depend on infrastructure. We have noticed that in 2020, some special debt limits of 1 trillion yuan will be issued in advance and the capital ratio of fixed asset investment projects will be lowered. This is aimed at making precise efforts to make up for the shortcomings of infrastructure. .

At the same time, environmental protection, replacement of manpower, and replacement of

Bucket pin of excavator produced by the company

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Suitable for Caterpillar (Caterpillar?); Daewoo?; Komatsu (KOMATSU?); Kobelco (KOBELCO?); Hyundai (HYUNDAI?); Hitachi (Hitachi?); Liebherr?; JCB?, ESCO ?; Excavators and loaders such as Kato, Xugong, Lingong, Xiagong, Lonking, etc.
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Products are exported to the United States, Britain, Japan, Canada, Singapore, the Middle East, Australia, Hong Kong and other countries and regions. The superior product quality has won unanimous praise from customers.
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Caterpillar excavator bucket tooth pin: 8E6208/1U4208, 8E6209, 6Y3228, 8E6259, 1495733, 8E6258, 9J2258, 8E6259, 3G9609, 9J2308, 8E6259, 8E6358, 9J2358, 9W2678, 8E88401, 6Y8359E, 3G9549, 7T3408 , 8E0468, 8E8469, 6Y8558, 1U1558, 8E5559, 3G9559, 6I6608/1139608, 6I6609, 4T4708/1134708, 4T4707, 9W2668/9J6583, 1U2405, 6Y3394, 6Y1204, 7J9600, 6Y3909, 6Y1207
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Komatsu excavator bucket tooth pin: 20X-70-00100, 203-70-74281, 09244-02489, 09244-02496, 09244-02508, 09244-02516, 09244-03036/426-847-1130, 209-70-54240 , 21N-72-14330/21N-72-14331, 195-78-71360, 198-78-21410/175-78-21340, 175-78-21810/175-78-21740,
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Bucket pin of modern excavator: E161-3035, 61E5-11150, E262-5004, 61E5-11150, 61E7-0105, 61EH-11150, 61E7-04620, 61E7-04630, 61N4-30350, 61N4-11150, K15, K20 , K25, K30, K40, K50, K70, K85, K115, XS40, XS50, XS115, XS145,
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Kobelco excavator bucket tooth pins: SK200, SK230, SK250, SK350, SK450
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Daewoo excavator bucket tooth pins: 2705-9014, 2705-9015, 2705- 2020, 2114-9008, 2705-9010, 2114- 1849, 2705-1021, 2114- 1849, 2705-1034, 2114-1931,
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Volvo excavator bucket tooth pin: 1171-01910, 1454-0728, 1455-0967, 1455-0968,
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ESCO/Hitachi excavator bucket tooth pin: 18-20PN, 18LK, 22PN, 22LK, 25-30PN, 25-30LK, 35PN, 35-40LK, 40PN, 35-40LK, 45PN, 45LK, 50PN, 50LK, 55PN, 55LK , 4K0043, 4K0041, V13-V17PN, V19-V23PN, V29PN, V33PN, V39PN, V43PN, V51PN, V59PN, V61PN, V69PN, V71PN, V81PN, 21LKS, 27LKS, 37LKS, 47LKS, 57LKS, 220-9090, 220-9110 , 220-9130, 286-2110, 233-7150, 232-0170, 75SV2PN-C, 85SV2PN-C, PZ90, PZ70, U25, U30, U35, U40, U45, U55,
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Liebherr excavator bucket tooth pin: 914PN, 914LK, 944PN, 944LK,
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H&L SP series bucket tooth pin: P156, P160, P162, 230PN, 240PN, P400HD, 23PB, 23PN, 23FP, TF23.
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The ten-year quality of Neutron Star Machinery is exclusively provided by the manufacturer, specialized and focused on the production of wear-resistant parts for construction machinery!