Electric constant torque wrench control device and method for power control and dynamic peak avoidance
A power control and control device technology, applied in the direction of wrench, program control, computer control, etc., can solve the problems of thyristor damage, inability to protect the motor, and large impact on the mechanical part of the tool, so as to improve the torque control accuracy and widen the torque control. range, the effect of enhancing resilience
Active Publication Date: 2018-06-26
SHANDONG ZHONGXING ELECTRIC TOOLS
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Problems solved by technology
[0008] Traditional tools only realize current protection, but cannot realize voltage protection because there is no voltage sampling and control loop
When the voltage is too high or too low, the motor cannot be protected, which is an important factor causing damage to the motor components of field tools
[0009] 2. The display method is not perfect
[0010] Traditional tools only realize the LED display of torque arrival and non-arrival, and lack effective and intuitive instructions for the judgment of faults such as overvoltage, undervoltage, motor disconnection, overcurrent, etc., making it difficult to judge on-site faults
[0011] 3. Lack of soft start
Method used
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[0052] In order to clearly illustrate the technical characteristics of the present solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limitin...
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The invention discloses an electric constant torque wrench control device and method based on power control and dynamic peak avoidance. The device comprises a CPU (Central Processing Unit) circuit, a current true virtual value sampling circuit, a voltage true virtual value sampling circuit, a zero-crossing point detection circuit, a silicon controlled rectifier trigger circuit, a power circuit, a torque setting circuit, an LED (Light-Emitting Diode) status indication circuit and a control switch. The method comprises a power control process and a dynamic peak avoidance process. According to the device and method disclosed by the invention, with the adoption of a manner of combining the power control and dynamic time peak avoidance, the torque control precision of an electric constant torque wrench is improved, the adaptability of the electric constant torque wrench is enhanced, a stating control point of the minimum torque of the electric constant torque wrench extends downwards, the torque control range of the electric constant torque wrench is widened, and adjustment of a control instrument of the electric constant torque wrench is simplified; and moreover, due to voltage monitoring and current secondary limit-crossing control, the electric constant torque wrench is effectively protected in exceptional cases, and the service life of the tool is prolonged.
Description
technical field [0001] The invention relates to an electric constant torque wrench control device and method based on power control and dynamic peak avoidance, and belongs to the technical field of electric tool thread assembly. Background technique [0002] The electric constant torque wrench is a kind of electric wrench. Its main feature is that the torque can be set and the torque can be adjusted to achieve precise control of the bolt torque. Electric fixed torque wrench is widely used in the erection of prestressed bolt structure bridges, the construction of steel structure workshops, the installation of chemical industry, metallurgy, power generation equipment, large machinery, lifting equipment and vehicle assembly operations, as well as the torque and Where the axial tension is strictly required. [0003] An electric constant torque wrench (hereinafter referred to as a tool) generally consists of a double-insulated single-phase series-excited motor (hereinafter refer...
Claims
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IPC IPC(8): B25B23/147G05B19/042
CPCB25B23/147G05B19/0423
Inventor孟易鸿
OwnerSHANDONG ZHONGXING ELECTRIC TOOLS