1.12meterscold drawing machine
Raw materials of cylinder barrel choose high quality 27SiMn alloy seamless steel pipe, through the cold drawing process, its mechanical properties are greatly improved, the mechanical parameters are shown in Table 1, sophisticated testing equipment are specially equipped to check and control mechanical parameters Accurate.
Table 1: Mechanical properties of cold drawing tubes
| material | Heat treatment state | tensile strength（MPa） | Yield Strength（MPa） | Elongation
（%） |
rate of reduction of?area（%） | Impact
AK （J） |
| 27SiMn | BK+S | ≥ | ||||
| 800 | 650 | 15 | 45 | 39 | ||
The comprehensive mechanical properties of the cylinder improved by the cold drawing process, especially the impact performance (AK) improved one time than the ordinary quenching process, toughness performance of cylinder more higher, the resilience is better by the lateral Force, improve the performance of the hydraulic cylinder.
2.straighten machine
Straightening provide prerequisites for the scraping rolling and boring rolling, straighten bending position of the steel pipe, so that the steel pipe to achieve the required straightness. At boring process, if the pipe is bending, the inner bore will appear black, partial wall and other phenomena, is not conducive to the hydraulic cylinder processing.
Wantong hydraulic chooses multi-roll straightening machine, with 10 straightening points, to achieve the automatic rolling straighten, the efficiency can be more than 300 m / h, the straighten processing length can reach 13 meters.
3.12meters honed machine
Each piece abrasive grain vertical pressure on the workpiece surface is only 1/50 ~ 1/100 of grinding, and honing speed is slow, so the cutting zone temperature can be maintained at 50 ~ 150 ℃ range, is conducive to reducing the processing surface of the residual stress, improve the surface quality.
Stable performance, easy operation, high efficiency, good－looking appearance, easy maintenance and high accuracy, cylindrical degree can be controlled within 0.03mm, the surface roughness is up to 0.4, and smooth and uniform. Honing range:φ40mm-φ450mm ，Honing longest length: 12000mm， lower noise, fast aging, low energy consumption, safe and practical.
4.scraping rolling machine
Under the precondition of process of cold drawing pipe，application of ordinary boring machine reconstruct to scraping rolling machine，to ensure the smooth finish of cylinder bore，straightness and other original technical state requirements unchanged under the premise，more than twice times time less use than original boring machine in the process the inner hole. For example: Inner diameter 158mm, length 1500mm, boring head feed speed of ordinary boring machine is 180mm/min, total cost 8 minutes 18 seconds, scraping head feed speed of the modified equipment is 400mm /min, total cost 3minutes 45seconds, time is increased by 2.2 times, in the leading level compared with ordinary boring machine processing technology.
5.CNC machine
Compared with common machine tools, CNC machine tools have the following characteristics.
High machining precision with stable processing quality.
Many coordinate can be linkage,?able to process complex shapes?parts.
Processing parts change, generally only need to change the NC program, can save production preparation time.
The machine tool itself is high in precision, rigid, can choose the advantageous processing quantity, the productivity is high (is the general machine tool 3~5 times?in general).
High degree of automation of machine tools, reduce labor intensity.
Higher quality requirements for operators, higher technical requirements for maintenance personnel.
6.robot arm
One new automatic equipment Line, main consists: robot and walking shafts, CNC lathe, abrasive belt grind, upper and lower material path, control system.
Characteristics: blank material on-line and finished product tube off-line automatic assembly line, accurate, efficient and save manpower,the main technological process : feeding— precision machine outside surface cylinder tube and the back impact ring groove , machine the guide part groove of the inner bore, machine the limit key groove of the ——grind outside surface—finished
7.heat treatment
The metal heat treatment is one of the most important technology in mechanical manufacturing, compared with other processing technology, heat treatment generally does not change the shape of the workpiece and the overall chemical composition, but by changing the internal microstructure, or change the surface chemical composition, provide or improve the performance. Its characteristic is to improve the internal quality of the workpiece, and which is generally not visible to the naked eye.
In order to make the metal parts with needed mechanical properties, physical and chemical properties, besides the reasonable selection of materials and various forming processes, the heat treatment process is often necessary. Steel is the most widely used material in the mechanical industry. The microstructure of steel is complex and can be controlled by heat treatment. Therefore, the heat treatment of steel is the main content of metal heat treatment. In addition, aluminum, copper, magnesium, titanium and their alloys can also change their mechanical, physical and chemical properties by heat treatment to obtain different service properties.
8.electroplating line
Gantry style linear electroplating production line is appropriate for copper,chrome, or zinc plating, aluminum oxidating, phosphorization electroplating of plastics, and other advanced technological requirements. And it can fulfill the functional and ornamental requirements according to the demands of customers. The whole line has the merits of rational structure, beautiful exterior. It is easy to operate and can be designed into full automation and automatic-manual operation. The automatic operating system can be programmed and controlled by computer. The roller of gantry overhead crane is made of lactoprene and moves smoothly without noise. All working procedures can be monitored. With the frequency control, the soft lift, the to-and -fro speed of 4-40m/min, and the lift speed of 10-14m/min, it is an automatic production line with wide adaptability, appropriate for coating baths of different dimensions.
9.waste water treatment equipment
10.durability test bench
The fatigue test bench, that is, the heat exchanger fatigue test bench, is an instrument used for durability test, which can automatically fulfil the cyclic actions of fatigue test, and make the judgement and count of test results, under the coordination of control system, the data acquisition system and other auxiliary measurement control devices.
The hydraulic cylinders produced by our company, through the test on the durability test bench, have fully extended and retracted 30,000 times, and the operations are stable with no leakage and deformation.