Talking about the equipment standard of pipe bending machine and the standard of bending radius of pipe bending

Pipe bending machine is the most common machine in our life. It is mainly used to bend an object, mainly used for electric power construction, highway and railway construction, boilers, bridges, ships, furniture, decoration and other aspects of pipeline laying and repairing , with many functions, reasonable structure, simple operation and so on. The pipe bending machine reduces labor costs and greatly improves work efficiency in the traditional mode. Pipe benders are inseparable from our life. For example, the office chairs we go to work need to use pipe benders as long as the pipes are bent. Especially in the industrial field, pipe benders are widely used. important parts. So what is the standard for the integrity of the pipe bending machine? See the following:

1. The parts are complete and complete, and the quality meets the requirements
1 The main transmission and auxiliary system parts are complete and complete, the hydraulic system has no leakage, the accessories are complete, and the quality meets the specified technical requirements.
2. The pressure gauge, oil standard and pressure relay are sensitive and reliable in protection, and the oil quality conforms to the technical standard of hydraulic oil.
3 The connection between the body and the foundation foot is firm and not loose.
4. The pipelines of the oil circuit system are reasonably arranged, without damage, and the transmission of hydraulic parts is sensitive and reliable.
5 The protective paint of the equipment does not fall off, the exposed surface is clean, and there is no grease or yellow robe.
2. The equipment is running normally and has good performance
1 Under rated load conditions, the relay protection system is sensitive and reliable, and reaches the output standard of the nameplate.
2. The equipment is well lubricated, the oil circuit is unblocked, the oil quality meets the technical requirements, the five-level lubrication is implemented, and the oil is filtered at three levels.
3 All gears and bearings in the gear box of the machine tool are lubricated by splash, and other parts are lubricated by dispersed and single point.
Three complete and accurate technical information
1 The equipment files, maintenance records, and acceptance records are complete, filled in timely and accurately, and the installation test records and fault maintenance records are complete and unaltered.
2. The statistics of the equipment operation table are accurate, the operation records are complete, there are reasonable operating procedures, and the equipment maintenance procedures are carefully implemented.
3. The technical instructions and drawings of wearing parts are complete, and there are assembly drawings that meet the needs of maintenance.
4. Equipment and environment are neat and clean
1 The environment is clean and tidy, without dripping or leaking. When the work stops, the tools and molds are restored to their original positions.
2 There are prescribed safe passages, and accessories are placed in an orderly and reasonable manner.

So what is the standard for the bending radius of the elbow?

First of all, one tube and one mold, for a tube, no matter how many bends it has, no matter what the bending angle is (should not be greater than 180°C), its bending radius should be uniform. Since one tube has one mold, how much bending radius should be selected for tubes of different diameters? The minimum bend radius depends on the material properties, the bend angle, the allowable amount of thinning on the outside of the bent tube wall and the size of the wrinkle on the inside, and the size of the ovality at the bend. Generally speaking, the minimum bending radius should not be less than 2 to 2.5 times the outer diameter of the pipe. For the ducts of aircraft or engines, because all kinds of pipes pass through the limited space inside and outside, the bending radius of the pipes should be smaller. A small bending radius can make the direction of the tube shape flexible and adaptable. For large-diameter engines and large aircraft, a slightly larger bending radius can be selected when the pipeline arrangement is relatively loose. Because a large bending radius is conducive to bending and forming, it is beneficial to bend pipes.

Secondly, multi-tube and one-die, the so-called multi-tube-one-die, means that tubes of the same diameter should use the same bending radius as much as possible. That is, using the same set of molds to bend tubes of different shapes. In this way, it is beneficial to compress the special process equipment to the maximum extent, reduce the manufacturing volume of the bending die, and thus reduce the production cost. In general, the use of only one bending radius for pipes of the same diameter may not necessarily meet the assembly requirements of the actual location. Therefore, 2 to 4 bending radii can be selected for pipes of the same diameter to meet the actual needs. If the bending radius is 2D (where D is the outer diameter of the tube), then 2D, 2.5D, 3D, and 4D can be used. Of course, the ratio of this bending radius is not fixed and should be selected according to the actual situation of the aircraft or engine, but the radius should not be too large. The specification of the bending radius should not be too much, otherwise the benefits brought by multiple tubes and one mold will be lost.

One tube adopts the same bending radius (ie, one tube, one mold) and the standardization of the bending radius of the same specification tube (multiple tubes and one mold). This is the current feature and general trend of foreign catheter design and modeling, and it is mechanization and automation. Replacing the inevitable result of manual labor is also the combination of the design adapting to the advanced processing technology and the advanced processing technology promoting the design.