News

1. When cnc pipe bending machine is purely bent, the outer tension of the neutral layer of the elbow is thinned under the influence of the external force, and the inner pressure is thickened by the action of this, and the cross section of the pipe is due to the resultant force. A change has occurred, causing a drop in the quality of the bend.
2. When the elbow is bent, the outer tensile force becomes thicker and the inner pressure becomes thinner. The orientation and the way of bending are different. In the process of compression and bending, the neutral axis is at a third of the distance from the outer wall. When working in the cornering, the neutral axis is at two-thirds of the distance from the outer wall. It can be seen that the use of the method of turning is beneficial for bending thin-walled pipes.
3, the accuracy of the bending tire is one of the reasons that can directly determine the quality of the bending tube, when making the bending tire, the size must be controlled within the specified range.
4. There are two reasons for the impact on the quality of the bent pipe: the bending property of the bent pipe itself, and the degree of corrosion of the curved pipe surface. At the time of operation, the staff must first know which raw materials are processed, and have an understanding of the processing performance, especially the degree of corrosion of the surface.

In recent years, cnc pipe bending machine are more and more widely used in the processing of fine pipe fittings, the use of more and more ordinary, which puts forward higher requirements for the accuracy of single head cnc pipe bending machine. So in recent years, this problem has been recognized and valued by more and more people.
(1) reduce the roughness of the workpiece's outer wall.
The surface roughness of the outer wall of the workpiece is related to the surface roughness of the ring groove on the bender wheel, and also to the nature and quality of the pipe. In order to make the workpiece look smoother after machining, the roughness of the outer surface of the bending metal pipe can be guaranteed to meet the requirements of the index as long as proper lubricating oil is applied to the surface of the ring groove on the wheel to reduce the friction between the contacting surfaces during operation.
(2) tube section shape accuracy
The accuracy of pipe section shape depends on the assembly accuracy of pipe bender and the shape accuracy of ring groove on the processing wheel and the reverse deformation wheel. As long as the operator guarantees the position accuracy of the two annular grooves formed on the assembled pipe bender and keeps enough dimension allowance according to the principle of elastic-plastic deformation of materials, the higher section shape accuracy of the pipe can be obtained.
(3) ensure the error limit of bending arc length of pipes.
According to the design drawings of the workpiece, the bending arc length of the metal pipe should be controlled within the precision range specified in the drawings.

1. The automatic cnc pipe bending machine adjusts the speed of the electric automatic pipe bending machine according to the thickness of the pipe material to ensure the normal outflow of water and emulsified oil, and protects the saw blade.
2. Turn on the power switch of the workshop to check whether the machine is normal, whether the protective cover is installed, and whether the installation is firm.
3. When installing the electric pipe cutter saw blade, the sawtooth is in the correct direction, the saw blade should be rotated counterclockwise to the correct direction, and then locked with a fixing nut.
4. According to the size of the saw blade and the thickness of the pipe material, the stroke of the automatic pipe bending machine blade is debugged. The saw tooth is 12 mm from the upper plane of the workpiece when the workpiece is stopped. After the workpiece is cut, the saw tooth is about 5 mm from the lower plane of the workpiece.
5. Run the empty machine for 1-2 minutes. After confirming the normal condition, lock the positioning device according to the fixed length requirement of the workpiece, and then feed the pipe material into the fully automatic pipe bending machine with the pitch adjusted so that the front end of the pipe material is flush with the positioning device. Then clamp the workpiece by hand clamping, operate the machine to cut, after cutting the workpiece, the machine should be returned to the original position, and the intermittent inspection should be carried out according to the specified time or quantity to meet the requirements of the drawings.
 
1. Surface pretreatment: The surface oxide scale and other impurities are removed by sand blasting, and the outer surface of the elbow is up to the standard Sa2 grade.
2. Non-destructive testing:
1) 100% UT or RT inspection is performed on each elbow weld, and RT inspection is performed on the repair of the weld. Meet the standards.
2) After the preparation of the groove, the 100mm length welds from the entire nozzle and the nozzle are subjected to magnetic powder or penetration test, and the grade I is qualified.
3) Each curved tube has a 90° arc surface on both sides of the outer arc for magnetic powder or penetration detection, and the depth of the defect is not more than 5% of the wall thickness.
4) For the pipe body within ±45° of the neutral surface of the outer arc of each elbow with a substantially constant wall thickness, the transverse crack defect is checked by UT.
5) According to SY/T6423.5 or SY/T6423.6, the curve of the elbow is tested in accordance with the standard.
6) Remanence: Check and degauss according to relevant regulations, no more than 15Gs.
3, visual inspection:
1) There is no crack, overheating, overburning; there is no hard spot on the surface;
2) Whether the inner and outer surfaces are smooth, with sharp notches, delamination, nicks, scabs, cracks, folds, tears, cracks, cracks and other defects.
3) It is not allowed to have a pit with a depth of more than 3.15mm or a pit with a depth of more than 1.5mm on the weld. It is not allowed to repair the dent by means of slamming.

The installation process of the pipeline involves many techniques. In the pipeline installation project, a large number of bends of various angles are required, such as 90° and 45° bends, B-shaped bends (back and forth bends), and bends (curved bends). , square telescopic device, etc., according to the conditions of the construction site and the diameter of the pipe diameter to select the processing equipment and the corresponding construction process, can be processed on-site, or can be shaped in the bending machine processing plant.

Machines required for pipeline installation: manual pipe bender, pulley bender, electric or hydraulic pipe bending machine, fully automatic cnc pipe bending machine, hair dryer, mold, steel ruler, oven, work table, acetylene generator, welding and cutting tools, etc. . Bending conditions: The construction drawing, standard drawing, and review have been completed. (There are construction sites and workbench that meet the safety requirements. The pipes with the certificate of conformity are all entered into the site.

Technical delivery has been carried out, familiar with the specifications, dimensions, angles of various processing parts, and compiled material cards. When using a manual bender to bend, the operator's face must avoid the bent steel pipe, so as to prevent the bender from slipping and hurting people. When using fire to bend, it is forbidden to stand at the mouth of the pipe to prevent the gun from injuring people. The location of the coal stove should be in good contact with the fire department. The flammable materials must be eliminated. The fire must be extinguished before work to prevent accidents. The acetylene generator must be equipped with a safety device to prevent tempering. The fuses, oxygen cylinders, oxygen meters and welding and cutting tools are strictly prohibited from being contaminated with grease. The oxygen cylinders should have anti-vibration rubber rings.

The single head hydraulic cnc pipe bending machine could be a new elbow tool with elbow perform and lifting perform. you'll be able to bend all types of pipes to the situation you would like to attain. The pipe bender has several blessings, like cheap structure, safe use, convenient operation, cheap worth, quick loading and unloading, multi-purpose and thus on. It occupies an over-sized share within the domestic market of hydraulic pipe bending machine.
1. The working rule and general structure of cnc pipe bending machine, single head pipe bending machine is usually composed of an electrical pump, a aggressive oil pipe, a fast connection, a operating oil cylinder, a plunger, a pipe bending element (including the higher flower plate, the lower flower plate, a die, a roller shaft). The aggressive oil output from the electrical pump is fed into the operating cylinder through the aggressive oil pipe. The aggressive oil pushes the plunger within the operating cylinder to provide thrust and bends the pipe through the elbow elements.
2. Hydraulic pipe bending machine are appropriate for piping and repairing in factories, warehouses, wharf, buildings, railways, cars, etc. Besides the perform of bending pipe, it also can unload the bending pipe element (cylinder) as a separate hydraulic lifting machine.

1, stainless steel pipe bending machine can be roughly divided into CNC pipe bending machine, hydraulic pipe bending machine and so on.
2, according to the operation mode can be divided into automatic pipe bending machine, semi-automatic pipe bending machine, manual pipe bending machine.
3. It is mainly used for electric power construction, public railway construction, pipeline laying and repair of boilers, bridges, ships, furniture, decoration, etc. It has many advantages such as multi-function, reasonable structure and simple operation.
4. In addition to the curved pipe function, the hydraulic pipe bending machine can also use the oil cylinder as a hydraulic jack.

The mechanism of the hydraulic automatic cnc pipe bending machine may be a power supply. It is mainly used to provide hydraulic control for the automatic pipe bending machine to control the pressure oil and adjust the displacement of the main pump. Once the hydraulic system is improperly adjusted, there will be serious consequences. Too high or too low will not work.
If the pressure of the hydraulic automatic pipe bender is too high, the hydraulic pump will operate at a pressure exceeding the rated pressure, causing the pump to overload, resulting in an increase in oil temperature.
If the pressure of the hydraulic automatic pipe bending machine system is too low, the working mechanism will frequently open and unload the overflow valve under normal load, which will cause the hydraulic system to overflow and generate heat.
The error derivation formula caused by the differential pressure transmitter of the automatic pipe bending machine shows that the main reason is due to the existence of the height difference when the differential pressure is calculated, that is, H≠0. In order to eliminate the existence of H, the two pressure points of the elbow sensor are required to be in the same horizontal plane. That is to say, in principle, a horizontal arrangement scheme may be adopted. However, when the horizontal scheme cannot be adopted, the length of the differential pressure pipeline and the online real-time compensation scheme should be shortened.
In the discussion of the formula of the radius of curvature ratio caused by thermal expansion, it can be known that when L1=L2, the deviation length of R' and R is the smallest, that is, it is required to make the lengths of straight pipes on both sides of the elbow as equal as possible. In addition, in order to reduce the concentration of stress in the pipeline at the elbow flow-meter, the method of dividing the elongation may be adopted, that is, separately setting the expansion joint or considering the length of the elbow flow-meter on both sides of the elbow flow-meter. π type installation method.
The fluid flowing through the elbow generates a centripetal acceleration motion due to the centripetal force exerted by the tube wall, forming an overall spatial rotational flow. (Flow State Expression) The intensity of the flow centripetal acceleration motion is characterized by the centripetal acceleration of the fluid and can be determined by measuring the fluid differential pressure signal inside and outside the elbow. Under the condition that the bending diameter ratio (bending degree) and the density of the fluid medium are known, the flow rate can be calculated by the formula when the differential pressure between the inner and outer diameters is measured.

How to solve the deviation and angle inaccuracy of pipe bending machine bending process. With the long time of use of pipe bending machine and hydraulic drive type hydraulic pipe bending machine, some mechanical parts begin to age, so we must have certain equipment for our pipe bending machine. In order to understand the reasons for the disassembly analysis. Generally, there is a deviation in the angle of the elbow. First, we should check whether the elbow angle controller of our bender, the encoder is damaged, and whether it is loose. After eliminating the encoder problem, we are checking whether the elbow arm is rubbed. Deviation of the elbow, and whether the oil temperature is too high, the bending speed is not uniform and the solenoid valve cannot control the oil pressure well.

During the machining method of the CNC pipe bending machine, thanks to the comparison of the heating speed, the mould cannot get an identical heating impact, in order that an outsized temperature distinction is definitely generated, that is that the main reason for the strain generation and variation. Once there's profit within the mould, it's susceptible to deformation.
It may be seen that it's doable to avoid the incidence of deformation solely by making certain that the pipe bending machine mould is heated uniformly. the foremost necessary issue is to regulate the heating rate and temperature adjustment in order that the mould features a sensible heat treatment impact, in order that the chance of deformation throughout use is additionally reduced.

Firstly, the soft starter is inspected by the CNC tube bender in detail, mainly to see if there is any wiring error in the main circuit and the control loop; secondly, the connection mode of the motor on the soft starter panel is “external” position; then the setting standard The parameter, the starting ramp time is set to 10 seconds, and the starting current is limited to 3 times. After the main circuit is energized, the control system sends a soft start signal to start the main motor.

Through repeated experiments, the optimal starting parameters of the vertical bender soft starter are obtained. The starting ramp time is 6 seconds and the starting current is limited to 2.8 times. Because it is a repeated test, it will cause a large increase in the number of starts, so you must pay attention to the following two problems:

(1) The cooling fan of the soft starter electric control cabinet should be running all the time to facilitate the smooth cooling of the power thyristor in the soft starter and reduce the junction temperature.

(2) There should be a 10-15 minute interval between each start to allow the power thyristor in the soft starter to cool down, thereby preventing the soft starter from alarming due to overheating.

1. Three-dimensional CNC pipe bending machine mold laser cutting is mainly applied to flat cutting and three-dimensional five-axis linkage three-dimensional cutting, high-strength steel is used for the body frame, to reduce the weight and improve the car while ensuring the strength and rigidity of the body. The crash-worthiness and anti-concave properties of the body significantly increase the safety of the car. For high-strength steel structural components with complex contours, laser cutting is a very effective tool for both technical and economic reasons.
2. Automotive white body top cover laser welding equipment This equipment is used for automobile body-in-white top cover welding. The equipment consists of two robots, a fiber laser, a wire feeder, a welding head, a laser protection room and a floor fixture. Work with a robot with a laser welding head for welding. The top cover clamp is carried by the robot, and the four V-shaped positioning blocks are matched with the positioning support frames on both sides to form a positioning. The four clamping cylinders on the positioning support clamp the top cover clamp. There is a quick change device between the top cover fixture and the robot, which can be switched between multiple models. Different from the traditional spot welding process, laser welding can achieve the molecular combination between two steel plates. Generally speaking, the hardness of the steel plate after welding is equivalent to a whole steel plate, thereby increasing the strength of the body by 30%. Also greatly improved, on the other hand, the overlap width and some reinforcing members can be reduced, and the volume of the body structure itself can be compressed, thereby reducing the weight of the vehicle body.
3. Off-line automotive tailor welded blank forming equipment Most steel plates used in automobiles are galvanized steel sheets, and the resistance welding process will destroy the galvanized protective layer. Therefore, laser welding is an ideal process for achieving welding and welding, which can ensure the formation of qualified welds and meet the requirements of corrosion resistance, high strength and fatigue resistance. The laser welding technology has many advantages, the weld seam is very narrow, and the heat affected zone is small. Through the long-range sacrificial effect of zinc, the weld seam can be not corroded for a long time, and the faster the welding speed, the higher the weld hardness.
4. Car stealth airbag instrument panel laser weakening equipment This equipment has linkage numerical control function, which can cut the workpiece of any shape, mainly used for the weak processing of the car stealth airbag instrument panel. The structure of the device is reasonable in design, with sufficient static, dynamic and thermal stiffness. The system has good dynamic quality and can show high precision in actual processing. The device is stable and reliable, easy to use, operate and maintain, and has a beautiful appearance.
5. Automotive variable-speed laser automatic cutting equipment The cutting efficiency can be doubled by using the automobile variable-speed CNC pipe bending machine mold. The cutting quality is better than the traditional processing method, the end surface is smooth, the positioning is accurate and the precision is high.
6. Automotive airbag liner laser welding machine Since the airbag liner of the car is equipped with gunpowder, the laser welding method is adopted, and the heat affected area is small, which can improve the safety and reliability during the processing, improve the production efficiency, and improve the welding quality.
7. Automotive gear laser welding uses laser welding technology to connect the gear assembly, which can improve the product precision of the transmission gear, simplify the product structure and manufacturing process, and can easily meet the continuous adjustment and sample parts of the product development and trial production. The need of manufacturing, and help designers to rationally layout the product structure, and constantly improve the level of product development and manufacturing; at the same time, due to the compact structure, accuracy and reliability of laser welded gear parts, can reduce vehicle failure rate and improve vehicles Manipulate flexibility and increase product reputation.
8. Automotive tail tube laser welding production line Laser welding stainless steel tube has the advantages of narrow joint heat affected zone, small grain growth and good cold forming performance, which can well meet all the cold processing requirements of automobile exhaust pipe production. The welding speed is high, and the welding speed is up to 6m/min with 5kW laser welding; the welding quality is stable, the quality is high, the deformation is small; the subsequent processing steps can be simplified, the production efficiency is high, and the scale of the equipment can be reduced under the same production scale.
9. Laser welding of the trunk of the car The trunk consists of a trunk lid and a rear panel. Because the forming has a 90° angle, the laser brazing is used for fillet welding. The traditional trunk welding is carried out by MIG brazing. Since the trunk material is usually galvanized, the low heat input of MIG brazing is used to solve the problems caused by the large burning of the galvanized layer, but the high-speed welding of MIG brazing and The instability of the arc at low current limits its efficiency and quality. Laser filler wire is mainly used for welding with complex welding or sharp change of weld tangential direction. The welding forming surface is smooth and it is difficult to form a smooth weld. In addition, MIG Brazing is highly polluted. If laser brazing is used, the welding speed is high, the weld bead is formed well, the quality is stable, and the galvanized layer is less burned.
10.Automobile bumper laser drilling equipment The automobile bumper is a special-shaped piece. The traditional stamping method is very complicated, and the parts are prone to deformation and stress. The laser cutting method is adopted, no complicated fixture system is required, no machining stress, no slit. Deformation, more suitable for post processing and installation.

The  pipe bending machine safety valve is a component that is automatically unloaded when the high pressure is exceeded in the autoclave. Therefore, the autoclave as a high pressure container should be equipped with two at the same time, so that when an accidental failure occurs, Generally should be slightly below the allowable pressure value. In order to ensure the good performance of the bender safety valve, regular maintenance and routine maintenance work must be carried out.
1. After the switch door product enters the kettle, the kettle door should be carefully closed, so that the kettle door and the kettle ring are in place, and the safety raft is pulled down. Before the gas supply is finally checked, the kettle door closure condition is completed and the maintenance is completed before the kettle door is opened. Care must be taken to check for pressure in the kettle. And first open the safety 筏, so that the steam in the kettle can be opened before the kettle door can be opened, and the operator is prevented from facing the kettle door to prevent being burnt by the high temperature steam.
2. Maintaining the hydrophobicity of the autoclave, which is subjected to the internal pressure caused by the steam, and the load of the autoclave and the weight of the steaming car and the product on the track fulcrum and the kettle body. The stress formed by the difference in stability between the top of the kettle and the bottom of the kettle due to condensed water. Under the cyclical stress for a long time, the autoclave easily causes the material to fatigue and lose part of the strength. At the same time, the corrosion of water and gas is also easy to reduce the strength of the material. Therefore, we should discharge the condensed water in time during the use, especially in the initial stage of the temperature rise. A large amount of condensed water is generated in the kettle. If it is not removed in time, it will accumulate at the bottom of the kettle to make the kettle body work to form a low temperature zone. The temperature difference between the upper and lower sides is increased (generally about 10 degrees Celsius. It is also possible to reach 60-70 degrees Celsius), and the excessive stress difference and thermal deformation difference in the upper and lower sides of the kettle are formed.