Stainless steel hydraulic punching machines often use twist drills for drilling holes in stainless steel workpieces. For hardened stainless steels, hard alloy drill bits can be used. Superhard high speed steel or ultra-fine grain carbide drills can be used under certain conditions. When drilling, the torque and axial force are large, the chips are easy to bond, not easy to break and the chip removal is difficult, the work hardening is intensified, the corner of the drill bit is easy to wear, and the rigidity of the drill bit is easy to generate vibration. Therefore, the drill bit is required to grind the chip flute, and the chisel edge is ground to reduce the axial force, and the double apex angle is repaired to improve the heat dissipation condition.
When drilling stainless steel, it is often found that the drill bit is easy to wear and break, the surface of the hole is rough, and sometimes the deep groove can not be eliminated; the hole diameter is too large, the hole shape is not round or tilted to one side. Pay attention to the following when using stainless steel hydraulic punching machine:
1. The geometry must be sharpened and the two cutting edges should be symmetrical. If the back angle of the drill bit is too large, it will produce a "snake knife" phenomenon, causing chattering, and the drilled hole will be polygonal. The chisel edge should be ground to reduce the axial force of the borehole.
2. The drill bit must be installed in a positive position to keep the drill sharp. After blunt, it should be repaired in time.
3. Reasonably select the bit geometry and drilling amount. According to the drilling depth requirement, the bit length should be shortened and the core thickness should be increased to increase the rigidity. When using a high speed steel drill bit, the cutting speed should not be too high to prevent the blade from being burned out. The feed rate should not be too large, in order to prevent the wear of the drill bit from increasing or to make the hole drilled, and the feed amount should be appropriately adjusted when cutting in and cutting out.
4. Fully cool and lubricate. The cutting fluid is generally vulcanized oil. The flow rate should not be less than 5~8 L/min. The cooling should not be stopped midway. When the diameter is large, the internal cooling method should be used as much as possible.
5. Pay close attention to the drilling process, and observe the chip discharge condition in time. If the chip is found to be disorderly wound, immediately retract the knife to prevent the chip from being clogged. Attention should also be paid to the sound of the machine tool. If abnormalities are found, the tool should be retracted in time, and the drill bit should not be allowed to stay on the drilling surface to prevent the surface hardening of the drilling surface from increasing.
CLW GROUP TRUCK Refrigerated truck, Chill Truck, Freezer Truck,Refrigerator truck,refrigerated van,refrigerator wagon, refrigerator car is used to transport frozen or fresh goods enclosed Van trucks, is equipped with a refrigerating unit of refrigeration device and polyurethane insulating compartment dedicated refrigerated transport cars, commonly used in frozen food transport (refrigerated truck), dairy (milk truck), fruits and vegetables (perishable cargo transport vehicles), vaccine and drug (vaccine transportation vehicles).
CLW GROUP TRUCK Refrigerated truck introduce
CLW GROUP TRUCK Refrigerated truck brief introduction
CLW GROUP TRUCK Refrigerated truck Structure:
Refrigerator car by walking part of the special purpose vehicle chassis, and heat insulation box body (generally consists of polyurethane materials, glass steel, color steel plate, stainless steel, etc.), refrigeration units, inside temperature recorder, etc. components, for the special requirements of the vehicle, such as meat hook car, installed with a meat hook, waist, the guide rail of aluminum alloy, ventilation slots and other optional.
CLW GROUP TRUCK Refrigerated truck Production technology of refrigerated compartment:
1, divided into pieces of "sandwich" plate bonding type, the domestic large refrigerated truck manufacturers are using this technology, the use of this technology to produce a high thermal insulation performance of refrigerated cars.
Refrigerated truck
2, divided into assembly of injection foaming type.
3, the whole skeleton injection foam type.
4, vacuum adsorption paste
CLW GROUP TRUCK Refrigerated truck Classification of refrigerating units:
Refrigerating unit is divided into non independent refrigeration unit and independent refrigeration unit. Domestic and imported units, etc.. General models are used in the external cooler, a mini refrigerator car with built-in refrigerator. For the lower temperature requirements of refrigerated vehicles, can be taken to the car body cold plate (equivalent to the function of the evaporator).
classification
According to the chassis manufacturer classification: Dongfeng refrigerator car, Changan Star refrigerator car, Qingling refrigerated trucks, refrigerated truck Jiangling, Jianghuai refrigerated trucks, Beiqi Futian refrigerated trucks
Semi Trailer
According to the bearing capacity of the chassis classification: Micro refrigerated trucks, small refrigerated trucks, medium-sized refrigerated trucks, large refrigerated trucks
According to the classification of car type: Bread refrigerated truck, refrigerated trucks, Semi-Trailer van truck
Characteristic
The container of the sealed refrigerated truck needs to be strictly sealed to reduce the heat exchange with the outside, so as to ensure the lower temperature in the refrigerator.
Refrigerated truck
The refrigeration equipment is connected with the container and provides a steady stream of refrigeration to ensure that the temperature of the container is in the range of the goods permitted.
Portability is generally used in refrigerated trucks transport goods are not for a long time to save the items, although there are refrigeration equipment, still need to quickly reach the destination.
A container similar to a heat insulated refrigerated truck is made of a material with better heat insulation effect, and the heat exchange is reduced.
CLW GROUP TRUCK Refrigerated truck Key equipment
1 refrigeration vehicle refrigeration unit
Refrigerated trucks refrigeration unit: for refrigerated container trucks to provide a steady stream of "cold" is an important equipment, generally installed in the container to the top of the front, air conditioning like appearance, but than the same volume of air conditioning has stronger refrigerating capacity.
Refrigeration unit is generally divided into two, independent type units and non independent type units. The difference lies in the independent unit completely by another unit to generate electricity for the maintenance work, non independent unit is completely through the work of the vehicle engine power to drive unit of the refrigeration work.
CLW GROUP TRUCK Refrigerated truck Carrier unit
Selection of refrigerating unit of refrigerated truck
According to the volume of refrigerated compartment and transport of goods to the requirements of the temperature, to choose a different power refrigeration unit.
2 refrigerated truck insulation body
The refrigeration unit of the refrigerated truck is used for temperature control, and the effect of the box body is used for maintaining the temperature. If the chiller is the provider of energy, the compartment is the storage of energy. In the three parts of the refrigerated truck, the refrigerating unit and the heat preservation box body are the most important, the removal of the chassis can be used as a small heat preservation, cold storage.
Selection of thermal insulation compartment
Body selection generally follow a few points: good thermal insulation performance, light weight, not easy to damage.
Refrigerated Truck,Freezer Truck,Refrigerated Van Vehicle,Chill Truck,Refrigerator Box Truck
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