Analysis of the current calculation method of gears

Analysis of the current calculation method of gears


Depending on the road, the vehicle and the driver, the individual gears will be subjected to different loads. In order to expand the range of use, the gearbox must have sufficient life for all gears, regardless of road. This means that the gearbox must allow the most unsuitable load at all speeds.
The test cycle delivers such a load, typically a single-stage cycle test time for pitting corrosion of the carburized hardened gear is determined by the Woβhler curve. Indicates a special design strategy: If the damage S is calculated for a certain gearbox, its allowable ultimate load or pressure can be calculated according to the Woβhler curve, which is suitable for gear design. Therefore, an optimal weight gear unit precisely adjusts the gear set and can be designed and developed in a short period of time without having to repeat it.
The Woβhler curve strength values ​​required for life calculations are suitable for testing the gearbox and are continually corrected with new tests. Special life characteristics take into account different materials, qualities, processes, lubricants (additives, viscosity) and various characteristics of the gearbox design as well as the requirements for use (safety).
Modern programs for gear design and recalculation are still an important rule in gear design and recalculation. However, as the requirements have increased, the finite element method has been adopted. Traditional and finite element calculation programs have been combined to form the FE spur gear program series. The finite element (FE) spur calculation program uses the Stiaus program to determine the number of teeth required for the test bench based cycle, allowable load, and individual speed ratios. It helps designers to adopt a comprehensive optimization algorithm and the minimum number of rough requirements for gear parameters. The Stitea program was used for the final design of each gear set and planetary gear train (ie Ravigneaux).
Stifer program and hob, cutting shaft frame steel device seat layer cutting assembly machine tool, grinding wheel is used to determine the semi-finishing and finishing gear cross-section geometry. The Stifa method is used to calculate the tooth shape correction and the space drum tooth geometry. The Stigen program using varying CAD and FE programs implements automatic FE unit generation including boundary conditions and loads. The actual load distribution is achieved using the modulus of elasticity using the Stilas or Stilar program. In such a case, the influence parameter method is no longer applied, and a nonlinear FE program is employed. The calculation results include Fourier analysis of load and deformation distribution and torque error.
Stitea design program with automatic drawing surface map Figure 6 shows that the Stitea design program automatically draws the surface map for easy operation. The program structure is the same as the original version and extended for regular use. In addition to a unit and symbol display, a search card method is employed for input, geometry, tools, etc. of the basic data of each gear set and planetary gear train. The input character set is a chart support. To fully guarantee the user, the additional program is related to selecting each input character set with a footnote. Similar inputs are implemented in a series of possible tests to prevent possible program failures. A number of boundary conditions have to be studied in gear design, which supplements common optimization algorithms with additional support required by Stiaus. Figure 7 shows a basic pre-design to examine the effects of different gear parameters in tabular form.
Gear parameter changes (selected via the pull2down menu) are calculated directly from the addendum correction factor and all new gear parameters are represented in the table in a dialog. This approach has clear operational advantages over processing data batch form programs. Nonlinear Finite Element Program Calculation Figure 15 shows the internal gear and large deflection ring gears and produces a simulation of the contact map offset. A nonlinear finite element program is used for this type of problem. The refinement of the grid is limited due to the extended calculation time.
Therefore, determining contact conditions by polynomial functions (faux functions) and surface bonding is particularly important for such programs. The finite element deviation is due to the large deformation between the precision tooth surface contacts. At the same time, it is necessary to study the characteristics of nonlinear materials related to high load in carburizing and hardening and material tempering.
Calculation of the tilt of the idler in the transmission gear In the example of the "spur gear of the car transmission" described above, the gear is fixed to the shaft. In the case of the idler, the deformation of the housing, the bearing clearance, the shaft have been described. The effect of bending, etc. A slight complicated force flow is applied to the shaft by the idler through the clutch body, the sliding sleeve and the synchronizer body. This system can also be analyzed using the appropriate three-dimensional FE method. All the parts involved, including the contact areas associated with them, are drawn as line drawings, since only durability, stability and friction calculations can be recommended if all parts include contact areas. The results of the detailed geometric line diagrams in the FE model have been accurately and discussed in detail, and are not sufficient for friction without friction.

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(1)2MK2218x50YS series and 2MK2215X25YS CNC Vertical Honing Machine is a new kind of CNC honing machine which is designed and produced by our company according the national science and technology major special project. A new CNC control system of honing machine spindle reciprocation is designed by us. It is consist of GSK control system and our special control module and obtained 8 patents of state.  The max. spindle accelerated speed of the machine reach 2.5g. The control system of the machine can control 5 axis output. The first axis can control spindle reciprocation move, that is, servo motor drive servo hydraulic valve, to get high reciprocation move and high accelerated speed, to control high accuracy of position and short stroke honing; The second axis can control servo motor to drive spindle rotary with stepless. The first and second axis linkage can get any honing cross-hatch angle; The third axis can control CNC worktable to get high accuracy position; Other two axis can control the pressure of rough and finish honing. This machine is equipped double feeding device, auto-measuring system to get plateau honing cross hatch. The module design is selected by the machine. In order to satisfy different customer, we will supply kinds of collocation from high, middle and low. It is suitable for honing kinds of automobile cylinder, cylinder sleeve through hole and blind hole which are high lower than 500 mm. It can be used alone and connecting with production line.

  2MK22-Vertical inside CNC honing machine

  18X-Max. honing diameter

  50--Max. honing depth

  YS-Hydraulic servo control spindle reciprocation

  G-G: High collocation; Z: Middle collocation; B: General collocation

  A-No letter: CNC cross worktable; A: Rotary worktable

  /1-CNC control number

              

 Specification                       Unit            2MK2215x25YSB         2MK2215X25YSG               2MK2218x50YSB                2MK2218x50YSG

Rang of honing dia.             mm             Ф50-Ф150                      Ф50-Ф150                           Ф50-Ф180                           Ф50-Ф180     

Max. depth of honing          mm                  250                                    250                                          500                                          500

Max. spindle stroke             mm                  500                                    500                                          800                                          800

Spindle reciprocation speed  m/min            3-25                                   3-25                                       3-25                                         3-25

Spindle rotary speed             r/min            10-600                               10-600                                    10-275                                    10-275

Type of worktable                 mm    Ф75 two station rotary table or 1200x500 CNC cross table (according order)

Spindle rotary motor power  kw          7.5 Servo motor              7.5 Servo motor                         11 Servo motor                     11 Servo motor

Hydraulic motor power         kw            5.5                                           5.5                                              7.7                                        7.7

High of machine                    mm          4661                                      4661                                           6028                                      6028

Cover area of machinem       mm           3738x2870                          3738x2870                                4845x3450                           4845x3450


2MK2218z2MK2210X22mk2225x702mk2215x2double spindle


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NingXia DaHe Machine Tool (Group) Imp And Exp Co.,Ltd , http://www.nxdhjcmachine.com