Method for process diagnosis and rotary atomizer arrangement
A technology of rotary atomizer and rotational speed, which is applied in the direction of spraying device, electrostatic spraying device, electric speed/acceleration control, etc., and can solve the problem that the rotational speed drops considerably.
Active Publication Date: 2014-01-01
杜尔涂装系统工程(上海)有限公司
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Problems solved by technology
[0003] A conventional rotary atomizer comprises a pneumatically driven turbine for a bell plate forming an ejection element, the rotational speed of which can be measured, for example, by optically sensing a rotating mark and passing the sensed pulse through an optical waveguide, and by means of Because the control circuit is kept constant by controlling the driving air (DE4306800C2 and EP1388372B1), although there is the following problem: at the beginning of the coating process, when the conventionally arranged main needle valve controls the outflow of the coating material from the atomizer , due to the inertia of the control system, the rotational speed initially drops rather sharply, which leads to coating defects and can only be corrected by complex additional measures
However, the above-mentioned problems are not solved by using the existing rotary atomizer
Moreover, the existing rotary atomizers have the above-mentioned problems: in the case of electrostatic coating, the entire rotary atomizer must be subjected to a high voltage of the order of 100 kV
The drive motor and its control system cannot be used without further measures in electrostatic rotary atomizers where the coating material is charged directly
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[0030] The components of the electrostatic rotary atomizer device are in figure 1 In zone 1 of , they are at high voltage, in particular those components of the actual nebuliser or those of the device constituting the nebuliser, the wrist joint and in this case some elements of the forearm of the coating robot are also under high voltage. The forearm itself can be made of insulating material as usual. With the exception of the primary circuit of the transformer arrangement described below, all components involved in zone 1 can be at high voltage.
[0031] In order to supply the area 1, a two-pole or multi-pole external supply line arrangement 2 is used, which, according to the illustration, supplies the primary windings of the three transformers T1, T2 and T3 connected in parallel , the transformer is configured as an isolation transformer with a high voltage insulation gap (for higher than 100 kV or even higher than 150 kV).
[0032] The alternating voltage of the supply l...
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A rotary atomizer arrangement and methods for operating the same are disclosed. An exemplary atomizer may be used for the coating of work pieces, and may include a bell plate driven by an electric motor. The exemplary atomizer may further be configured for the detection of errors in the spraying process and / or the drive system of the bell plate, such as by analyzing corresponding parameters of typical values of the drive motor.
Description
technical field [0001] The invention relates to a method for process diagnostics during the coating, in particular painting, of workpieces such as vehicle bodies or body parts and a corresponding rotary atomizer arrangement according to the preambles of the independent claims. The atomizer device may in particular comprise an electrostatic rotary atomizer, or an atomizer and the forearm of a painting robot, on which the rotary atomizer is arranged via a conventional wrist joint. Background technique [0002] Electrostatic rotary atomizers are well known. In atomizers that operate by directly charging the coating material, the conductive parts of the atomizer are usually placed at high voltage so that the coating material can be charged by an electrode arrangement comprising a All conductive parts such as bell plates, paint tubes, threaded fasteners, etc. However, it is also known that the coating material can be charged externally by means of external electrodes. [0003]...
Claims
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IPC IPC(8): G05D13/62B05B5/04B05B15/14
CPCB05B5/0422B05B5/0415B05B12/08B05B15/14H02P29/10
Inventor M·鲍曼T·布洛克J·哈斯F·赫勒M·弗赖A·迈斯纳H-J·诺尔特B·塞茨
Owner 杜尔涂装系统工程(上海)有限公司