Gear forgings, as the name suggests, are a kind of gear produced by forging technology. The performance of gear forgings will be more stable, and the damage rate will be reduced a lot during operation, so the demand for gear forgings is very large.

Gear forgings are also a kind of forging products. When forging, it needs to be carried out according to the rules. At the same time, some hard technical requirements need to be met. Now forging manufacturers will introduce the technical requirements of gear forgings.

1. The allowance size of gear forgings should conform to national standards.

2. Gear forgings should ensure a suitable forging ratio during forging, and should not be forged with round steel of similar size.

3. Do not use billet forging.

4. The material of gear forgings should be consistent with the material of the parts, and the chemical composition should meet the national standard. And issue a bill of materials.

5. To ensure normal forging temperature, not forging at low temperature or over-burning.

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Details can be accessed by clicking here:https://www.gold-emperor.com/technical-requirements-for-gear-forgings/

The accuracy of cylindrical roller bearings increases sequentially from 0. For general use, 0 is sufficient, but when used in special conditions or occasions, a precision of 5 or higher is required. Although the above accuracy is based on the ISO standard, its name is different in each standard. The following lists the applicable accuracy of various cylindrical roller bearing types and the comparison between the standards.

Dimensional accuracy

1. Allowable deviation of inner diameter, outer diameter, width and assembly width;

2. The allowable deviation of the inner diameter of the complex circle and the diameter of the outer circle of the roller group;

3. The allowable limit value of the chamfer size;

4. The allowable variation of the width and the rotation accuracy;

5. Allowable radial runout and axial runout of inner ring and outer ring;

6. The allowable lateral runout of the inner ring;

7. The allowable variation of the inclination of the outer diameter surface;

8. The allowable variation of the thickness of the thrust bearing raceway.

Standard cylindrical roller bearings have many sizes and forms. Standard bearings are used in the design of mechanical devices. The nature, size and direction of the load of cylindrical roller bearings and the load applied to the bearing are changeable. Usually, the rated base load is shown on the dimension table. However, axial load and radial load, etc., are also important factors in choosing a suitable cylindrical roller bearing.

When the ball and needle roller bearings are of the same size, needle roller cylindrical roller bearings usually have higher load capacity and withstand higher vibration and shock loads. The allowable speed is determined according to factors such as the type, size, accuracy, cage type, load, lubrication method, and cooling method of the cylindrical roller bearing. The allowable rotational speed of standard precision bearings under oil lubrication and grease lubrication is listed in the cylindrical roller bearing table. Generally, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation.

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Details can be accessed by clicking here:https://www.prsbearings.com/a/news/determination-of-accuracy-of-crossed-cylindrical-roller-bearings.html

The high-speed automatic valve bottom paper bag paper tube machine is a linkage production line. The tube making machine is used to produce medium-sized stepped bottom bag tubes and straight-cut bag tubes. It needs to be used in conjunction with the bottom gluer to complete the entire valve bag. production process.

The bottom paste paper bag has low cost and high strength. It is widely used in the packaging of powdery and granular materials such as cement, chemical raw materials and grains. The paper tube machine is composed of multiple production control systems. Next, the paper tube machine manufacturer will introduce to you in detail what are its production control systems?

Features and functions of production control system of paper tube machine

1. Automatically correct the deviation of the paper

The paper feeding automatic deviation correction system is to make the paper edge of each layer of bag automatically run at the set position, to ensure the accuracy of the trapezoidal incision of the bag tube and the position of the glue, and it is an important automatic control function to ensure the quality of the bag tube and the glued bottom bag.

2. Automatic brake on paper break

When paper breaks occur at the paper holder, virtual cutting and the entrance of the main machine, emergency automatic braking is realized, which effectively avoids the phenomenon of traffic jam caused by untimely detection of paper breaks, shortens the processing time of paper breaks and reduces paper waste.

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Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/paper-tube-machine-production-control-system.html

In the mine production site, vibrating screen is a common equipment, which needs to screen and dehydrate materials. Since it is a large-scale equipment and the workload of the equipment is large, the maintenance work of the vibrating screen should be done well at ordinary times, and the lubrication and maintenance can ensure the normal production and operation of the vibrating screen. So what kind of lubrication is used for the vibrating screen? Generally, there are two types of lubrication, oil lubrication and grease lubrication. The following editors from Hiside will give you a detailed introduction.

1. Lubrication method of vibrating screen

Oil lubrication of vibrating screen

Lubricating oil has strong fluidity and dispersibility, so the oil-lubricated seal needs to be safe and reliable. The sealing device is more complicated than grease lubrication, and it is more difficult to disassemble and maintain. Oil lubrication is generally suitable for bearings operating at high speeds or in environments with high bearing temperatures. Commonly used oil lubrication methods include oil bath lubrication, circulating oil lubrication, drip oil lubrication, oil injection lubrication, and oil and gas lubrication.

Grease lubrication of vibrating screen

Grease has the characteristics of strong adhesion, not easy to run off, and good pressure resistance. Due to the weak fluidity of the grease, the grease lubricated sealing device is relatively simple, the disassembly and maintenance are more convenient, and a special oil supply system is not required. Grease lubrication is generally suitable for work in low and medium speed and moderate temperature environments. Commonly used greases are calcium-based grease, sodium-based grease, aluminum-based grease, general-purpose lithium-based grease, extreme-pressure lithium-based grease and molybdenum disulfide extreme-pressure lithium-based grease.

2. Characteristics of vibrating screen lubrication method

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Details can be accessed by clicking here:https://www.hsd-industry.com/news/vibrating-screen-lubrication-method/

The tractor clutch is through the operating mechanism, relying on the friction between the main and driven components, to temporarily separate or gradually connect the engine and the transmission to transmit power, facilitate shifting, ensure a smooth start of the tractor, and prevent damage to parts caused by overloading. During the use of the tractor, many drivers cannot use and maintain the clutch properly, and do not realize the importance of correct adjustment of the clutch. Often due to improper adjustment of the use and operation, the early wear of the clutch and the damage of the transmission parts are caused, which reduces the service life. In order to reduce the failure of the clutch and prolong its service life, it must be used and adjusted correctly.

Correct use and maintenance

(1) When using the clutch, do it quickly and completely when disengaging, and slowly release the pedal when engaging. When the tractor starts, release the pedals quickly. Obstacles and rough terrain cannot be overcome by slamming the clutch pedal.

(2) The time for stepping on the clutch pedal to separate should not be too long, generally not more than 15 to 20 s. If you need to stop for a long time, the gear lever should be in the neutral position and the pedal should be released.

(3) Do not habitually press your feet on the pedals. When driving, do not step on the clutch pedal at all times except for starting, shifting and braking at low speeds. Otherwise, the clutch is often engaged, disengaged or semi-slipped, which will accelerate the wear of the clutch friction plate and pressure plate.

(4) Try to avoid starting with a heavy load. When the tractor starts with a heavy load, the clutch is prone to serious slippage, which generates frictional heat and burns, cracks, warps and deforms the pressure plate and driven plate of the clutch, and the compression spring is annealed. The asbestos friction plate is generally within the working temperature of 400 ℃, and the friction coefficient above this temperature decreases with the increase of temperature. Therefore, during heavy-load operations, if the ploughed land encounters local resistance changes, it is necessary to shift gears in time, and the plow should be slightly lifted before starting to reduce the starting resistance.

(5) When stopping normally, the accelerator should be closed first, then the clutch should be disengaged, and the brake should be properly used to make the locomotive stop smoothly; when stopping in an emergency, the accelerator should be quickly closed, and the brake pedal should be quickly pressed, and then the clutch should be disengaged. The double-acting clutch can operate the PTO handle only after the second-stage friction plate is disengaged.

(6) In use, the friction plate adheres to oil, which will cause the clutch to slip; the clutch will be immersed in muddy water, which will cause the parts to rust. At this time, the clutch must be disassembled, the muddy water should be wiped off with cotton yarn, the oil stains and rust spots should be cleaned with gasoline, and the friction plates should be reassembled after drying in the shade or drying (no drying is allowed). When the clutch assembly is installed on the flywheel of the engine, it is best to use a mandrel for positioning, which can ensure the concentricity of the center of the clutch friction plate and the first shaft, and make the gearbox and the engine assemble smoothly.

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Details can be accessed by clicking here:https://www.syclutch.com/news/how-to-extend-tractor-clutch-life.html