What are the selection methods for robot bearings?

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Robot bearings are generally used as joint bearings. The commonly used robot bearings are cross roller bearings and thin-walled bearings with equal cross-section. These two bearings are one of the key accessories for robots. When selecting robot bearings It must be selected according to actual needs, and there are also many precautions when choosing.

The selection method of robot bearings

robot bearings

1. Selection of bearing type

The bearing model is generally selected by the user’s technicians according to the use conditions of the supporting products and the bearing load. The business personnel mainly understand whether the actual load of the user is in line with the requirements. If the load cannot meet the usage requirements, they should advise the customer to change the model as soon as possible, but unless it is a special product, generally there will be no problem in the selection of the model.

2. Selection of bearing clearance

When purchasing uranium bearings, users generally only inform them of the type and grade, and rarely ask for the clearance of the bearing. They need to understand the service conditions of the bearing, and the bearing speed, temperature, and fit tolerance are directly related to the bearing clearance.

3. Oil selection

The choice of grease is generally based on the special speed of the shaft, temperature resistance, noise requirements and starting torque.

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More detailed information about robot bearing selection methods can be accessed by clicking:https://www.prsbearings.com/a/news/robot-bearing-selection-method.html

HOW TO REALIZE AUTOMATIC PRODUCTION OF HYDRATED LIME PRODUCTION LINE

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One of the commonly used processing equipment in the field of calcium powder processing is hydrated lime equipment. With the strong requirements of the environmental protection department for the powder processing industry to strictly prohibit dust pollution. From a single piece of equipment, it has developed into an entire calcium hydroxide production line that is basically automated from automatic lime feeding to automatic ash, automatic slag discharge, automatic dust collection, automatic powder selection, and automatic quantitative weighing and packaging.

The entire line It is environmentally friendly and labor-saving, which greatly reduces the operating cost of calcium powder processing. With the continuous development of science and technology, if we want to gain a firm foothold in the fierce market competition, we must increase the investment in science and technology. How to realize the automation of equipment has become a problem that manufacturers are very concerned about.

Assembly line industrial production will have more advantages in automated production. In fact, for the production of basic hydrated lime, if a relatively basic assembly line operation method can be achieved, the output of hydrated lime will also be improved. For the basic hydrated lime production line It is also necessary to realize basic automation. Of course, this needs to ensure the perfection of some core parts of the production equipment.

The use of hydrated lime equipment is also based on a relatively complete system for basic operations. For the production of basic calcium hydroxide, the current production equipment can already guarantee the output and quality. If the production of the equipment is more If it is perfect, there is basically no need for human operation. Of course, this requires the hydrated lime production line to have a complete drive system, transmission system, execution system, detection system, and control system. Five major systems.

1. Drive system. The driving system is the power source of the main machine, only with the driving system can the hydrated lime production line run.

2. Transmission system. Through the transmission device, the kinetic energy can be transmitted to each execution system, so that the execution system has kinetic energy, so that the purpose of transportation can be achieved, and the energy can also be transferred to the auxiliary system in the hydrated lime production line.

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For more detailed information about the automatic production of calcium hydroxide equipment, please click to visit:https://www.ly-gaifeng.com/blog/automatic-production-of-hydrated-lime-production-line.html

What should be paid attention to when installing a linear vibrating screen

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Linear vibrating screen is a multifunctional screening and grading machine. It is widely used in mining, coal, smelting, motor installation process, building materials, refractory materials, light industry, chemical industry and other industries. It has the advantages of large output and high precision. About linear vibrating screen how much do you know about the installation?

What should be paid attention to when installing the linear vibrating screen?

Install the vibrating motor of the linear vibrating screen, the connecting screws must be tightened before use, especially three days before the trial of the new screen machine, it must be tightened repeatedly to avoid loosening and causing accidents; vibration damping spring: prevent vibration from being transmitted to the ground, and at the same time support the screen box The full weight, when installed, the spring must be perpendicular to the ground; screen frame: made of pine or wood with less deformation, mainly used to keep the screen flat and achieve normal screening;

Screen: There are several kinds of screens such as low carbon steel, brass, bronze, stainless steel wire, etc.; Bracket: It is composed of four pillars and two channel steels, supporting the screen box. When installing, the pillars must be vertical to the ground. The channel steel should be parallel to each other; screen box: it is welded by several steel plates with different thicknesses, has certain strength and rigidity, and is the main component of the screen machine.

The linear vibrating screen motor should have reliable grounding. There is a grounding device inside the motor, and the lead end has a mark. It can also be grounded with strong bolts on the foot; the motor should be fastened on the installation surface, and the installation surface must be smooth and flat; the motor can be installed horizontally. ;Adjustment of excitation force; The motor lead wire adopts four-core rubber cable, and the lead wire cable is not allowed to have sharp bends when connected to the power supply, and it is reliably fixed with the vibrating body.

Installation steps and methods of linear vibrating screen

Linear vibrating screen

1. The linear vibrating screen should be checked before installation

(1) Whether the packaging is complete and undamaged, and whether it is damp;

(2) Whether the motor is deformed or damaged during transportation, whether the parts are complete, and whether the fasteners are loose or falling off;

(3) Whether the motor nameplate data meet the requirements;

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For more detailed information about the installation precautions of the linear vibrating screen, please click to visit:https://www.hsd-industry.com/news/precautions-for-installing-linear-vibrating-screen/

What is the production process of the ball press roller skin

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The quality of the roller skin of the briquetting machine directly determines the service life of the briquetting machine. The hardness of the roller skin is the most important parameter to measure the quality of the roller skin of the briquetting machine. The hardness of the roller skin depends on the alloy steel grade selected for the roller skin and the final level of heat treatment process.

The production process of the roller skin of the ball press

Firstly, the blank is made according to the drawing of the roll skin, and then processed by turning, so that all sides are clean and eight sides are smooth. The next step is to carve the ball socket on the circumference of the roller skin. Of course, the size and shape of the ball socket need to be determined according to the diameter of the roller skin and the pressed material and other factors. The latter process is heat treatment, which is also the most critical process. In the case of the same raw material of the roll skin, the hardness of the roll skin is determined by the heat treatment.

Ball press roller skins can be divided into two types in terms of technology: casting and forging. The commonly used steel grade for casting roll skin is 65 manganese alloy, the cost is relatively low, but the hardness of the roll skin is not too high, not very wear-resistant, suitable for pressing fine materials such as coal powder and clay. The commonly used steel grade for forging roller skins is 92 chromium molybdenum, which is relatively high in price and cost, but the hardness of the made roller skins is also relatively high, which can reach above HRC62, and is suitable for pressing rough materials such as iron powder and metal ore powder.

roller-shell

1. The material of the roller skin of the briquetting machine

The material of the roller skin of the briquetting machine is divided into 65 manganese, 9 chromium and 2 molybdenum, high chromium alloy and so on. When pressing different materials, different roller skins should be selected: 65 manganese roller skins are more popular and belong to steel castings with low cost. , can suppress coal powder, coke powder, charcoal powder and other materials; 9 chromium 2 molybdenum, high chromium alloy briquette machine pressure rollers are forged parts, mainly used in medium and large briquette briquetting machines with high output, and can be used to suppress ore powder, iron concentrate powder, magnesium oxide powder, laterite nickel ore, etc.

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For more detailed information about the production process of ball press roller skin, please click to visit:https://www.zymining.com/blog/ball-press-roller-skin-production-process.html

How to carry out anti-corrosion treatment on water tank trucks

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The tank body of the water tank truck is generally made of high-quality carbon steel plate, and the thickness of the plate is generally between 4-6mm. In order to improve the corrosion resistance and service life of the steel tank body, corrosion-resistant materials or stickers can be sprayed on the inner surface of the tank Anti-corrosion lining is applied, and some measures are taken for anti-corrosion treatment.

Generally, the common methods for anti-corrosion treatment of water tank trucks are:

water tank truck

(1) Zinc coating: used for shipping gasoline, benzene, mixed xylene, cement, water, excrement and other materials.

(2) Painting: Due to the filling of water, cement, excrement and other materials

(3) Tin coating: used for shipping light oil, heavy oil, lubricating oil and other petroleum products.

(4) Lead-coated: Pure lead is a very good corrosion-resistant material. Lead-coated tanks are suitable for shipping dilute sulfuric acid and benzyl chloride, but not for hydrochloric acid and alkalis. Lead and its alloys are poisonous and should not be in contact with food items. They are also harmful to the human body, and protective measures should be taken when using them.

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For more detailed information about the anti-corrosion method of water tankers, please click to visit:https://www.ly-cimc-linyu.com/a/news/water-tanker-anti-corrosion-treatment-method.html

TECHNICAL REQUIREMENTS FOR FORGED SHAFT FORGINGS

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Shaft forgings should choose different materials and adopt different heat treatment specifications (such as quenching and tempering, normalizing, quenching, etc.) according to different working conditions and use requirements, in order to obtain certain strength, toughness and wear resistance.

45 steel is a commonly used material for shaft forgings. It is cheap and can obtain better cutting performance after quenching and tempering (or normalizing), and can obtain comprehensive mechanical properties such as higher strength and toughness. The surface hardness after quenching can be improved. Up to 45~52HRC.

Alloy structural steel such as 40Cr is suitable for shaft forgings with medium precision and high rotational speed. This kind of steel has good comprehensive mechanical properties after quenching and tempering.

Bearing steel GCr15 and spring steel 65Mn, after quenching and tempering and surface high-frequency quenching. The surface hardness can reach 50~58HRC and has high fatigue resistance and good wear resistance, and can manufacture high-precision shafts.

Input shaft

38CrMoAIA nitrided steel can be used for the main shaft of precision machine tools (such as the grinding wheel shaft of grinding machine and the main shaft of coordinate boring machine). After quenching and tempering and surface nitriding, this kind of steel can not only obtain high surface hardness, but also maintain a soft core, so it has good impact resistance and toughness. Compared with carburizing and quenching steel, it has the characteristics of small heat treatment deformation and higher hardness.

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More detailed information about the technical requirements of shaft forgings can be accessed by clicking:https://www.gold-emperor.com/technical-requirements-for-forged-shaft-forgings/

How to Repair Excavator Slewing Bearing

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During the operation of the excavator, the slewing bearing has to bear a large impact load. When the excavator is tilted, the stress state is even more unfavorable. Generally, when the excavator runs for about 350,000 hours, the slewing bearing of the excavator may be crushed or broken, and the tooth profile wear and broken teeth at the junction of the two halves of the ring gear are particularly serious. Practice has proved that using insert welding to repair the slewing bearing is simple and fast, and can ensure the performance of the whole machine.

1. Preparation before welding

(1) According to the damage of the ring gear, determine the position of the fixing hole and the damaged segment to be replaced, and then cut off the segment of the tooth to be replaced by gas cutting.

(2) According to the part of the ring gear that needs to be repaired, process and make inserts, or cut out a section of relatively good gear teeth from the corresponding part of another old ring gear under the condition of ensuring the pitch, and gas cut out the joint groove shape.

(3) Determine the position of the fixing hole of the insert, and drill the hole to fix it on the corresponding part of the ring gear. Note that the accuracy of the position of the fixing hole must be ensured.

excavator slewing bearing

(4) In order to ensure that the weld has high strength and can withstand large shock and vibration, the junction 507 electrode with a diameter of Φ4 mm is selected, and the electrode should be baked at 250-350 °C for 1 h before use.

(5) AX3500 DC arc welding machine is used for welding with DC reverse connection method, and the current is 130-140 A.

2. Welding process

(1) Preheat before welding, use 2 large gas torches to heat the welding surface to about 200 ℃.

(2) Using the tempering weld bead method, the latter weld has a tempering effect on the previous weld, which is beneficial to eliminate the hardened structure produced by the previous weld.

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More detailed information on how to repair the excavator slewing bearing can be accessed by clicking:https://www.excavatorbearing.com/a/bearing-knowledge/excavator-slewing-bearing-repair.html

What are the damage forms of thin-walled crossed roller bearings?

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Thin-walled crossed roller bearings are composed of crossed cylindrical roller bearings and crossed tapered roller bearings. Due to their particularity and incomparable advantages over other bearings, they are widely used, and some damages will inevitably occur in the use engineering , so what are the damage forms of thin-walled cross rollers?

Surface wear and peeling of rolling elements (balls and balls, etc.) and inner and outer ring raceways:

This will cause the radial clearance and axial clearance of the thin-walled crossed roller bearing to increase, the thin-walled crossed roller bearing will emit noise and heat during operation, and change the correct working position of the mating shaft, resulting in vibration. The initial stage of surface fatigue spalling is pitting on the surface, which develops into flaky surface exfoliation. Both the rolling elements of the bearing and the raceway surfaces of the inner and outer rings are subjected to periodic pulsating loads, resulting in periodically changing contact stress.

When the number of stress cycles reaches a certain number, fatigue spalling occurs on the working surface of the rolling elements or inner and outer ring raceways. If the load of the bearing is too large, this fatigue will be exacerbated. In addition, if the bearing is installed incorrectly and the shaft is bent, the raceway will also peel off. The fatigue spalling of the bearing raceway will reduce the running accuracy of the shaft and generate vibration and noise.

crossed roller bearings

Wear of mating surfaces of inner and outer rings:

This is because the inner and outer rings of the thin-walled crossed roller bearing are not assembled with the shaft and the housing hole, which destroys the matching relationship between the bearing and the housing, the bearing and the shaft, and further accelerates the matching between the bearing itself and the shaft or housing that matches it. Surface wear (commonly known as the inner or outer ring of the shaft).

Spacer wear and looseness:

During work, the isolation ring and the rolling elements (balls, rollers, etc.) rub against each other, and if the lubrication is poor, the wear will be accelerated. After the isolation ring is worn, the rolling elements will loosen, and in severe cases, the isolation ring will fall apart and the rolling elements will fall off.

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More detailed information about the damage forms of thin-walled crossed roller bearings can be accessed by clicking:https://www.prsbearings.com/a/news/damage-forms-of-thin-walled-crossed-roller-bearings.html

How to adjust the height of tractor clutch lever

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The clutch assembly consists of three sets of tractor clutch disc, clutch pressure plate and release bearing. The tractor clutch disc is a composite material with friction as the main function and structural performance requirements. Friction materials are mainly used to manufacture brake friction plates and tractor clutch discs.

The inner end of each release lever of the tractor clutch and the release bearing must be in contact together, so that the vehicle can start smoothly. If the height of the inner end of the disengaged lever is different, the tractor clutch will vibrate when it is tightly connected.

Therefore, during assembly and maintenance, it is necessary to check the contact between the inner ends of each separated lever and the release bearing. It is required that the inner ends of each separated lever be located on the same plane, and the deviation should comply with the original regulations, generally not exceeding 0.25 mm. If it does not meet the requirements, it should be adjusted by adjusting the position of the adjustment screw at the inner end of the separated lever or the toe.

For the pulsation damper spring clutch, if the pulsation damper spring is separated, it means that the load on the pulsation damper spring is uneven or reduced due to damage, corrosion, cracking, etc., it must be upgraded. The spring separation means of the pulse damper must be evenly arranged on the center of the circle, and the deviation should not exceed 0.5mm.

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More detailed information on how to adjust the height of the tractor clutch lever can be found here:https://www.syclutch.com/news/tractor-clutch-lever-height-adjustment.html

Detailed Explanation of Grow Rack Ventilation Solutions

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The grow rack technology provides convenience for plant lovers, but the temperature and humidity control of the grow rack is particularly important for plants. Too high or too low temperature and humidity will affect the planting quality and even cause diseases and insect pests. If some effective measures can be taken to make the ventilation and cooling effect of the grow rack better, and at the same time reduce its operating cost, the ventilation system will become a link that consumes a lot of energy for the grow rack.

How to control the temperature of the grow rack?

It is mainly adjusted by means of ventilation and heating, that is, a ventilation system, to ensure the necessary ambient temperature required for the growth of plants. The cooling of the grow rack is mainly through the exchange of air inside and outside the frame, and ventilation to adjust the internal temperature.

Fan forced cooling system is the best cost-effective

When choosing an evaporative cooling method (wet pad-fan cooling system, spray humidification and cooling system), it is necessary to make a technical and economic comparison of the “one-time investment and operating costs” of each plan, and minimize the total cost as the goal of the optimization plan. At present, the fan forced cooling system has become the most widely used ventilation and cooling system. This system is combined with a special axial flow fan for the greenhouse and a wet curtain, and the ventilation is fast and the temperature is cooled very quickly. After many experiments, it has been shown that the fan forced cooling system has become a cost-effective ventilation and cooling solution with good cooling effect and low cost.

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For more detailed information about grow rack ventilation solutions, please click to visit: https://www.etegreen.com/blog/grow-rack-ventilation-solutions/