Temperature control circuit and temperature control method for hot knife mechanism

A technology of temperature control circuit and hot knife, applied in temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of increasing production cost, little relationship between resistance and temperature change, increasing the power of hot rod, etc.

Inactive Publication Date: 2016-06-22
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, existing hot knife mechanisms, such as "CN201320642944.X Hot Cutting Knife" and "CN201020158354.6 A Locking and Separating Device Driven by Hot Knife", do not have the function of monitoring temperature. The power of the hot rod must be increased, resulting in energy loss
In addition, the blades of existing hot knives are mostly made of copper or copper alloys, for example, "CN20111004...

Method used

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  • Temperature control circuit and temperature control method for hot knife mechanism
  • Temperature control circuit and temperature control method for hot knife mechanism
  • Temperature control circuit and temperature control method for hot knife mechanism

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples.

[0023] Such as figure 1 As shown, the whole system is composed of power supply, control circuit and blade body. Such as Figure 4 As shown, the blade body is mainly composed of an end cover 1, a spring 2, a blade body 3, a slider 4, a connecting rod 5, a set screw 6, an electrode 7 and an electric heating element 8. Wherein, end cover 1 is connected with the left end of spring 2; The right end of spring 2 is connected with the left end of slide block 4; Slide block 4 is positioned at the cavity of knife body 3; The connection with the left end of the electrode 7 adopts a direct plug-in type, and then is fixed with a set screw and connected with the relative thread. The right end of the electrode 7 is connected with the heating element 8 .

[0024] The temperature control circuit of the hot knife is as figure 2 shown. The tem...

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PUM

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Abstract

The invention relates to a temperature control circuit for a hot knife mechanism, comprising a common-mode choke coil, a DC/DC power module, a MOS tube, an MCU, a voltage and current sampling circuit, an open-collector NAND gate, and an electric heating element. The input end of the common-mode choke coil is used for connecting a bus of an external power supply, and the output end is connected with the input end of the DC/DC power module. The positive output end of the DC/DC power module is connected with the drain of the MOS tube. The gate of the MOS tube is connected with the MCU. The electric heating element is connected between the source of the MOS tube and the negative output end of the DC/DC power module. The negative output end of the DC/DC power module is connected with the MCU through the voltage and current sampling circuit. The MCU is connected with a principal computer through the open-collector NAND gate. The temperature of the electric heating element is controlled through a closed-loop control algorithm according to the linear proportion relationship between resistance and temperature. According to the invention, a hot wire blade works in a constant-power mode, the resistance of the hot wire blade is controlled by adjusting the voltage and current of the hot wire blade, and therefore, the temperature of the hot wide blade is controlled.

Description

technical field [0001] The invention relates to a temperature control circuit with temperature control and state monitoring functions and a temperature control method thereof, which can be applied to temperature control of various hot knife mechanisms. Background technique [0002] The hot knife is a knife used to cut objects after heating. Its main purpose is: cutting cable insulation layer, scraping off other objects that need high temperature to be scraped off, cutting braid, etc. At present, existing hot knife mechanisms, such as "CN201320642944.X Hot Cutting Knife" and "CN201020158354.6 A Locking and Separating Device Driven by Hot Knife", do not have the function of monitoring temperature. The use power of the hot rod must be increased, resulting in energy loss. In addition, the blades of existing hot knives mostly use copper or copper alloys. For example, "CN201110049274.6 Hot Knife for Wax Figure Engraving Machines Can Quickly Replace the Knife Head". The temperatu...

Claims

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Application Information

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IPC IPC(8): G05D23/24
Inventor 阳方平张涛李涛杨君娟袁顺宁张峰崔龙李洪谊
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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