It was run at 140 r/miri for 1 hour. In the whole test, the disk is running smoothly and without impact vibration. The oil pressure of each oil chamber of the main shaft hydrostatic bearing is basically stable, except for a little noise (the machine gear is not running in the initial stage of operation, the gear pair of the main drive system is not running). Both are large, after a period of operation, this situation will be effectively improved), and other working conditions are normal.
200mm, the depth of the feed is 20mm, and the feed amount is about 1. 2mm / r, the end face and the outer circle of the sample are respectively cut.
Continuous air-to-air operation test: After determining the working procedure (the working program includes all functions and working ranges of the machine tool), the machine performs automatic cycle continuous operation for more than 16 hours without failure.
As a result, all the tests were successfully completed, which indicates that the machine tool has good operational reliability and can fully meet the user's requirements.
Structural Features of the Machine Tool An important structural feature of contemporary heavy-duty horizontal lathes is: typical structure, diversified functions, and modular design. The DLA090 CNC heavy-duty sleeper is designed according to the principle of modularity. The structure is considered from the perspective of the whole series, that is, the main components such as the bed, the headstock, the tailstock, the slide and the tool holder are designed into several modules. It is composed of machine tools of various specifications. This can greatly reduce the design and production costs, shorten the production cycle, and adapt to the market.
The bed of DLA090 consists of three sections, one of which is the main shaft bed and the other two sections are four-rail bed; the workpiece bed and the tool holder bed each have two guide rails, which are the overall bed structure, the tool holder bed and the workpiece. The bed is integrated and has good structural rigidity. At the same time, the lengths of the two sections of the four-track bed are different (two modules respectively), and the bed of the same length can be used, or the bed of different lengths can be combined with the head box bed for use ★ Products and Technologies Products meet the different requirements of each user for the maximum length of the workpiece.
The tailstock consists of two parts, the upper body and the lower body, and is also two modules. The upper body of the tailstock is fixed on the lower body of the tailstock. In this way, when the height of the machine center is different, as long as the height of the headstock bed is adjusted, the tool holder and the tailstock lower body are replaced by different modules, and other components are basically versatile, which can meet the requirements, and is extremely convenient and flexible.
In addition, the function accessories such as grinding head, milling head and inner hole tool holder and each center frame are designed as different modules. Users can choose according to specific conditions, and the process adaptability is good, which can meet the requirements of use without increasing the cost. .
The main motor of the machine tool is a wide-regulated DC motor controlled by a thyristor, which adopts 6RA27 full digital DC speed control device. The main drive system has two mechanical gears and hydraulic shifting. There are two different encoders at the end of the spindle, which are used to meet the functional requirements of thread, constant speed cutting and indexing.
The machine has two independent feed mechanisms: the longitudinal movement of the slide and the lateral movement of the carriage mounted on the slide and the holder fixed to the slide.
The tool holder slides through the servo motor, and realizes the longitudinal feed through the transmission gear box to the double-gear rack transmission mechanism that eliminates the meshing gap; the tool holder body and the sliding seat are realized by the servo motor through the transmission gear box to the preloaded ball screw. Horizontal feed. The longitudinal (Z-axis) guide rail and the lateral (X-axis) guide rail of the slide slide are closed constant-current hydrostatic guide rails, and the static pressure oil chamber is supplied by the unique multi-headed chestnut of Wuzhong. The guide rail moving the guide rail is the Teflon soft belt guide rail, and the rail soft belt is made by SHAMBAN.
The tool holder changes the traditional multi-layer structure to a frame structure, which increases its rigidity. The tool holder body is a steel casting piece, and there is one knife row on each of the left and right sides. The power is respectively transmitted from two servo motors to the ball screw through a pair of gears to drive the knife row to move.
The longitudinal movement of the machine slide (Z-axis) and the lateral movement of the left and right two-row rows (t/axis and F-axis j are all detected by a semi-closed loop using a pulse encoder (a grating can also be used for full-closed detection, according to the user). Depending on the requirements), the lateral movement of the carriage (Z-axis) is measured by the German Heidenhain scale for full closed-loop detection.
The CNC system of the machine tool adopts Siemens 840D, which can realize the linkage of the Z axis and the Z axis. It can also link the Z axis with the axis or F axis, and can also be connected with the spindle rotation for the thread and constant speed cutting.
The operating system of the machine tool is concentrated on the control box on the left side of the platform. At the same time, there is a button station on the headstock and the tailstock, which makes the operation more convenient...
In addition, the machine tool has a chip evacuation device and a cooling device. The bed rail and the slide tool rail are respectively equipped with a multi-layer telescopic stainless steel shield and a steel belt type non-pound steel shield to protect the high precision guide rail pair.
The headstock is a one-piece structure (see picture). The spindle system and the main drive system are separated in two chambers of the cabinet to facilitate control of the temperature rise of the spindle and the return of the hydraulic system.
The front and rear support of the main shaft is a static pressure bearing, and the axial direction is a high-precision thrust roller bearing. Among them, the two hydrostatic bearings are symmetrically arranged with four oil chamber structures, which have good centering and can ensure the external load of the main shaft increases. When the direction changes, the rotation accuracy can still be maintained. The spindle assembly has high precision, good rigidity, large bearing capacity and reasonable structural arrangement.
In order to solve the possible failure of the main shaft and the bearing sleeve due to the difference in thermal expansion coefficient of different materials, 12 sets of butterfly springs are arranged at the rear end of the main shaft to compensate for the problem of thermal expansion.
In order to meet the requirements of high speed of the machine tool, the main drive large ring gear with a diameter of 1380mm adopts high-strength alloy steel 42CrMo, and special heat treatment is adopted in the process to ensure its high strength and wear resistance.
The maximum load capacity of the machine tool is 80t. For this reason, a static pressure bracket is arranged under the disk, and the external force is balanced by the pressure of the static pressure oil chamber, so that the spindle can withstand a large external load.
The hydraulic system of the hydrostatic bearing is a constant current static pressure system, one cavity and one pump. The flow rate of each oil chamber is the same, does not change with the oil pressure change, the external force increases, the oil chamber pressure also increases, and the oil film stiffness is high. Since the oil film in the hydrostatic oil chamber of the main shaft has sufficient rigidity and the pressure is in the third power relationship with the oil film thickness, the external force can only change the pressure distribution of the oil chamber, which can ensure the spindle has good rotation precision. The hydraulic system of the static pressure bracket is a constant pressure static pressure system. The oil is supplied in parallel by two blades of different flow rates. The pressure of the oil chamber can be set with the external load. Therefore, the static pressure bracket always balances the external load and is stable. Reliable support force enables the spindle to maintain normal working conditions for a long time. CNC technology used in DLA090 CNC heavy duty sleeper, high-precision detection and compensation technology, static pressure technology (including spindle hydrostatic bearing, disk static pressure bracket, each feed) The system's static pressure rail), constant flow oil supply multi-head pump technology, gapless transmission technology, spindle and large ring gear processing and heat treatment technology, etc., have a high standard and have their own unique features. mouth
Purline machine is a purline channel rollformer line, purline machine can produce C purline, Z purline, U purline, Sigma purline and L angle purline. Thickness is from 1.5mm to 4 mm, size from 80-300,100-400mm. The Purline machine including full automatic C purline Roll Forming Machine, manual adjusting C purling rollformer line, full automatic Z purline machine and manual adjusting Z purline machine, full automatic CZ purline machine and half automatic CZ purline machine, full automatic Sigma purline machine and manual adjusting sigma purline machine. The purline machine working flow is: de-coiler, leveling system, roll forming machine, hydraulic punching system and cutting system. The cutting system has two types, front cutting and post cutting.
Purlin Rollforming Line,C Purlin Rollforming Line,Wall Angle Profiles Rollformer,Purlin Roll Forming Machine
WUXI ZHONGTUO ROLL FORMING MACHINERY CO LTD , https://www.rollformertec.com