WO2021012597A1

WO2021012597A1 - Variable-frequency polarization polishing apparatus and method

Info

Publication number: WO2021012597A1
Application number: PCT/CN2019/126545
Authority: WO
Inventors: 陈嘉朗
Original assignee: 陈嘉朗
Priority date: 2018-08-29
Filing date: 2019-12-19
Publication date: 2021-01-28
Also published as: CN110872725A; TWI694181B; TW202018131A; CN110872725B

Abstract

A variable-frequency polarization polishing apparatus (A) and method. Said apparatus comprises: a power supply module (1), provided with a power supply connection end (11); an inverter frequency converter (2), outputting an alternating current having an adjustable frequency; a frequency control apparatus (3), controlling the frequency of the alternating current outputted by the inverter frequency converter (2); a control device (5), controlling a predetermined frequency of the alternating current of the frequency control apparatus (3); and an electropolishing device (6), using the alternating current which is outputted by the inverter frequency converter (2) and has a variable frequency and a variable voltage, such that the electropolishing device (6) directly machines the surface of a workpiece with an alternating current of the predetermined frequency and voltage. Thus, provided are the apparatus and method which are used for an electropolishing device (6) and can change the frequency of a machining current in a variable-frequency manner, achieving the purpose of stable polishing.

Description

Frequency conversion polarization polishing device and method

Technical field

The invention relates to a frequency conversion polarization polishing device and method, which can be used in electrolytic polishing equipment to change the frequency of processing current by means of frequency conversion to achieve the purpose of stable polishing.

Background technique

The general polishing technology uses physical polishing or chemical polishing to make the metal surface smooth, while traditional physical polishing uses grinding and polishing methods. Grinding and polishing methods are likely to cause metal oxidation, and the grinding and polishing are easily limited to the angle of the object to be polished. In areas or gaps where the included angle is too small, it is difficult to use grinding methods for polishing operations. In order to simplify the polishing process and optimize the polishing method, the industry has begun to use chemical polishing. Chemical polishing mainly uses electrolytic polishing for polishing. The principle uses the microscopic bumps on the metal surface in a specific electrolyte and an appropriate current density. First, the principle of anode dissolution is used for polishing. It is also called electropolishing. The workpiece is used as the anode to connect to the positive electrode of the DC power supply. Lead or Conductive materials resistant to electrolyte corrosion such as stainless steel are used as the cathode, connected to the negative electrode of the DC power supply, and the two are immersed in the electrolyte at a certain distance. At a certain temperature, voltage and current density, the small protrusions on the surface of the workpiece are energized for a certain time It dissolves first, and gradually becomes a smooth and shiny surface.

The characteristics of electrolytic polishing are: the polished surface will not produce a deteriorating layer, no additional stress, and can remove or reduce the original stress layer; for hard materials, soft materials and thin walls, complex shapes or difficult to be mechanically polished Small parts and products can be processed; the polishing time is short, and multiple pieces can be polished at the same time, with high production efficiency; electrolytic polishing is mainly used for metal products and parts with small surface roughness, such as mirrors, stainless steel tableware, decorations, injections Needles, springs, blades or stainless steel tubes, etc., can also be used for polishing molds or metallographic abrasive discs; therefore, electrolytic polishing is widely used in mass production and needs polishing production lines. The feature that can simultaneously polish a large number of objects makes the production speed faster Traditional mechanical polishing is faster.

According to the above, electrolytic polishing uses the workpiece as the anode to connect to the positive pole of the DC power supply, and uses lead or stainless steel and other conductive materials resistant to corrosion by the electrolyte as the cathode, and connects to the negative pole of the DC power supply to achieve the effect of electrolytic polishing. The surface roughness achieved is related to the original surface roughness. Therefore, rougher objects still need to be mechanically polished to trim the surface of the object before electrolytic polishing. Large and large area polishing is difficult to complete and complete polishing, so the industry is more productive There are tools for partial electrolytic polishing; however, due to the poor versatility of the electrolyte, short service life and strong corrosivity, the application range of electrolytic polishing is limited. Therefore, the brush is attached to the electrolyte for partial electrolytic polishing, making it easy to replace the electrolysis Liquid type; during the brushing process, the contact area between the brush and the workpiece directly affects the resistance value between the brush and the workpiece. When the resistance value of the brush is too high, the brush is easily broken due to overheating, causing the brush beard Frequent replacement, and when the resistance value of the workpiece is too high, it is easy to cause a partial depression of the metal surface. The electrical energy and material consumption in the process are indeed a major drawback and need to be improved.

In view of this, and based on years of relevant experience in this field, the inventor carefully observes and studies, and cooperates with the scientific application, and then proposes a reasonable and effective improvement of the present invention.

Summary of the invention

The main purpose of the invention is to provide an electrolytic polishing equipment that can change the frequency of the processing current by using a frequency conversion method to achieve the purpose of stable polishing.

To achieve the above objective, a frequency conversion polarization polishing device of the present invention is characterized in that it has:

A power supply module, which is provided with a power connection end, the power connection end is electrically connected to the power supply, so that current is introduced into the power supply module from the power connection end, and the power supply module outputs direct current; an inverse frequency converter, which It is electrically connected with the power supply module, the direct current output by the power supply module is introduced into the inverter, and the inverter outputs alternating current with adjustable frequency; a frequency control device is connected to the inverter In a sexual connection state, the frequency control device is used to control the frequency of the alternating current output by the inverter; a control device is electrically connected to the frequency control device, and the control device controls the predetermined frequency of the alternating current of the frequency control device; and , An electrolytic polishing equipment, which is electrically connected to the inverse frequency converter, uses the frequency-converted and variable-voltage alternating current output from the reverse frequency converter to directly process the electrolytic polishing equipment on the surface of the workpiece at a predetermined frequency and voltage of alternating current .

A frequency conversion polarization polishing method is characterized by the following steps: a) Power supply rectification: Connect a power supply module to the power supply and convert the output current of the power supply into direct current through the power supply module; b) Set value: use A frequency control device sets a predetermined current frequency, and a voltage control device sets a predetermined voltage. The frequency control device and the voltage control device control the current frequency and voltage of the alternating current output by an inverter. The inverter and the The power module is in an electrically connected state, and the direct current output by the power module is led to the inverter, and the inverter outputs alternating current with a predetermined current frequency and a predetermined voltage; c) polarization polishing: the inverse inverter and an electrolytic The polishing equipment is in an electrical connection state. The electrolytic polishing equipment uses the alternating current output from the inverter to perform polarization polishing on the surface of the workpiece through the electrolyte; d) Finished product acquisition: take out the workpiece after polishing is completed and remove the electrolyte on the surface, In turn, a polished finished product is obtained.

The effect of the frequency conversion polarization polishing device and method of the present invention is that: the present invention is suitable for electrolytic polishing equipment, by means of the power supply module, which is provided with the power connection end, and the power supply module converts alternating current to direct current; The inverter is electrically connected to the power module, the inverter converts the direct current output from the power module to alternating current; the frequency control device is electrically connected to the inverter, The frequency control device controls the frequency of the alternating current output by the inverter; the control device is electrically connected to the frequency control device, and the control device controls the predetermined frequency of the alternating current of the frequency control device; the electrolytic polishing equipment is connected with The inverted frequency converter is in an electrical connection state, and the electrolytic polishing equipment is directly processed on the surface of the workpiece with alternating current by using the alternating current output by the inverted frequency converter; thereby, a frequency conversion polarization polishing device and method are provided, especially one In the polishing process, the frequency of the processing current is changed by the frequency conversion method to achieve the purpose of stable polishing.

Description of the drawings

Figure 1 is a block diagram of the electrical connection of the present invention.

Fig. 2 is a block diagram (1) of the process of the present invention.

Figure 3 is a schematic block diagram (2) of the process of the present invention.

Figure 4 is a schematic diagram (1) of the implementation of the preferred embodiment of the present invention.

Figure 5 is a schematic diagram (2) of the implementation of the preferred embodiment of the present invention.

Detailed ways

Please refer to Figures 1 to 5, which show the frequency conversion polarization polishing device and method of the present invention. It has: a frequency conversion polarization polishing device A. The frequency conversion polarization polishing device A includes: a power module 1. an inverse frequency converter 2. A frequency control device 3, a control device 5 and an electrolytic polishing device 6; among them:

The power module 1 is provided with a power connection terminal 11, and the power module 1 converts AC power into a constant frequency and constant voltage DC power; the inverter 2 is electrically connected to the power module 1 , The inverter 2 converts the direct current output from the power supply module 1 into alternating current; the frequency control device 3 is electrically connected to the inverter 2, and the frequency control device 3 controls the output of the inverter 2 The frequency of the alternating current; the control device 5 is electrically connected to the frequency control device 3, the control device 5 controls the predetermined frequency of the alternating current of the frequency control device 3; an electrolytic polishing device 6, which is connected to the inverter 2 In an electrical connection state, the electrolytic polishing equipment 6 is directly processed on the surface of the workpiece with alternating current by using the alternating current output by the inverter 2;

Based on the above structure, it is further explained as follows:

A slow start device 7 is additionally provided between the inverse frequency converter 2 and the electropolishing equipment 6, and the slow start device 7 is electrically connected to the inverse frequency converter 2 and the electrolytic polishing equipment 6, and the slow start device 7 controls the The voltage and current output by the inverter 2 are gradually increased to the predetermined output voltage and current;

The slow-start device 7 is provided with a plurality of adjustment elements 71, and each adjustment element 71 of the slow-start device 7 respectively controls the gradual increase value of current frequency and the gradual increase value of voltage;

The slow-start device 7 is provided with at least one display 72, and each display 72 of the slow-start device 7 displays the gradual increase value of the current frequency and the gradual increase value of the voltage;

The slow start device 7 is provided with a resistance sensor 73 to detect the resistance between the brush and the workpiece when the workpiece is processed. When the contact area between the brush and the workpiece is small, the resistance value is large, and the contact area between the brush and the workpiece is large. When the resistance value is large, the inverter 2 can reduce the current frequency and voltage when the resistance value is large, and increase the current frequency and voltage when the resistance value is small, so as to avoid the contact area between the brush and the workpiece. If it is too small, the surface of the workpiece will be irregularly dented due to instant electrolysis, or the brush will be burned due to excessive resistance;

The power module 1 can further be provided with at least one variable resistor 12, so that the voltage and current of the DC power output by the power module 1 can be adjusted by the variable resistors 12 of the power module 1, so that the power supply The output current and voltage of module 1 are in an adjustable state;

A voltage control device 4 is provided between the power supply module 1 and the inverter 2 which is electrically connected to the power supply module 1 and the inverter 2, and the voltage control device 4 is provided with At least one variable resistor 41, and the voltage control device 4 is electrically connected to the control device 5, so that the voltage control device 4 can adjust the current input by the power module 1 through the variable resistors 41 The predetermined voltage and current can change the processing power of the electrolytic polishing equipment 6 directly on the surface of the workpiece with alternating current, and the voltage control device 4 can use the resistance generated by the electrolytic polishing equipment 6 to automatically adjust the required parameters and Control the predetermined voltage and current;

The voltage control device 4 adjusts the output current and voltage in either digital or analog mode. When the voltage control device 4 is in a digital mode, an IC board and a transistor are used to control the output current and voltage, while in an analog mode, it is changed by a relay. The resistance method controls the output current and voltage;

The control device 5 is provided with a plurality of adjustment members 51, and each adjustment member 51 of the control device 5 respectively controls a predetermined current frequency and a predetermined voltage value;

The control device 5 is provided with at least one display 52, and each display 52 of the control device 5 displays a predetermined current frequency and a predetermined voltage value;

The electrolytic polishing equipment 6 is provided with a current output terminal 61 and a current return terminal 62. The current return terminal 62 of the electrolytic polishing equipment 6 is clamped, clamped, pivoted, or attached to make the The current return end 62 of the electrolytic polishing equipment 6 is electrically connected to the workpiece;

Wherein, the current output terminal 61 of the electrolytic polishing device 6 is immersed in electrolyte or brushed on the workpiece with a brush attached to the electrolyte to polish the surface of the workpiece;

The power module 1 is a wide-voltage rectifier, so that the power connection terminal 11 of the power module 1 can be connected to a power source with a voltage of 90V to 240V;

The frequency waveform of the alternating current output by the electrolytic polishing equipment 6 is a sine wave, a modified sine wave, a triangle wave, a ripple or a square wave, or any combination of waveforms, so that different waveforms can be used during the polishing process. Different polishing effects;

So far, it can be seen from the above structure that the present invention can be used in variable frequency electrolytic polishing equipment, and during the electrolytic polishing process, the control equipment 5 is provided with various adjustment elements 51, and each adjustment element 51 of the control equipment 5 controls a predetermined current. The value of the frequency and the predetermined voltage enables the electropolishing process to change the value of the predetermined current frequency and the predetermined voltage according to the polishing depth to achieve the function of a metal polishing device with adjustable power;

Furthermore, the control device 5 is additionally provided with the slow start device 7, the slow start device 7 is electrically connected to the inverter 2 and the electropolishing equipment 6, and the slow start device 7 controls the inverter 2 The output voltage and current are gradually increased to a predetermined output voltage and current; the slow-start device 7 is provided with a plurality of adjustment elements 71, and each adjustment element 71 of the slow-start device 7 controls the gradual increase in current frequency and the voltage gradual value. Incremental value; and at one end of the slow-start device 7 is provided with each display 72, each display 72 of the slow-start device 7 displays the current frequency gradually increasing value and the voltage gradually increasing value, wherein the slow-start device 7 is provided with a resistor Sensor 73. The resistance sensor 73 detects the resistance between the brush and the workpiece when the workpiece is processed. When the contact area between the brush and the workpiece is small, the resistance value is large, and the contact area between the brush and the workpiece is large, the resistance value is small. The resistance value method enables the inverter 2 to reduce the current frequency and voltage when the resistance value is large, and to increase the current frequency and voltage when the resistance value is small, to prevent the surface of the workpiece from being generated by instant electrolysis when the contact area between the brush and the workpiece is small Irregular dents, or the brush is burned due to excessive resistance, to achieve the function of a metal surface treatment device that automatically adjusts the output power;

So far, a frequency conversion polarization polishing method has the following steps:

S1 Power supply rectification: Connect a power supply module 1 to the power supply and convert the output current of the power supply into direct current through the power supply module 1;

S2 setting value: a frequency control device 3 is used to set a predetermined current frequency, and a voltage control device 4 is used to set a predetermined voltage. The frequency control device 3 and the voltage control device 4 control the alternating current output from an inverter 2 Current frequency and voltage, the inverter 2 is electrically connected to the power module 1, so that the direct current output by the power module 1 is introduced into the inverter 2, and the inverter 2 outputs a predetermined current frequency and a predetermined voltage Alternating current;

S3 Polarization polishing: The inverse frequency converter 2 is electrically connected to an electrolytic polishing equipment 6, and the electrolytic polishing equipment 6 uses the alternating current output from the inverse frequency converter 2 to perform polarization polishing on the surface of the workpiece through electrolyte;

S4 Finished product acquisition: After polishing, the workpiece is taken out and the electrolyte on the surface is removed, and then the finished product is obtained;

The power module 1 is a wide voltage rectifier, and the power connection terminal 11 of the power module 1 is connected to a power source with a voltage of 90V to 240V;

With the above method, it is further explained as follows:

S10 power supply rectification: connect the power supply module 1 to the power supply and convert the output current of the power supply into direct current through the power supply module 1. The power supply module 1 is a wide voltage rectifier, so that the power connection terminal 11 of the power supply module 1 can be used Connect a power supply with a voltage of 90V～240V, and convert AC power to DC power;

S20 set value: use the frequency control device 3 to set a predetermined current frequency, and the voltage control device 4 to set the predetermined voltage, the frequency control device 3 and the voltage control device 4 control the AC output of the inverter 2 Current frequency and voltage, the inverter 2 is electrically connected to the power module 1, so that the direct current output by the power module 1 is introduced into the inverter 2, and the inverter 2 outputs the frequency control device 3 and the predetermined current frequency and predetermined voltage alternating current set by the voltage control device 4;

S30 Polarization polishing: The inverse frequency converter 2 is electrically connected to the electrolytic polishing equipment 6. The electrolytic polishing equipment 6 uses the alternating current output from the inverse frequency converter 2 to perform polarization polishing on the surface of the workpiece through the electrolyte. In the electrolysis process, the surface material of the conductive workpiece is separated by electrolysis, and the frequency conversion function is used to deal with the polishing process of different depths, so that the metal surface is restored to gloss;

S40 Finished product acquisition: After polishing, the workpiece is taken out and the electrolyte on the surface is removed, so as to obtain the finished polishing product;

As shown in the above content, the use state description of the preferred embodiment of the frequency conversion polarization polishing device and method of the present invention includes a frequency conversion polarization polishing device A, and the frequency conversion polarization polishing device A includes: a power module 1 , An inverse frequency converter 2, a frequency control device 3, a control equipment 5 and an electrolytic polishing equipment 6; wherein: the frequency conversion polarization polishing device A, the power module 1, the inverse frequency converter 2, the frequency control device 3. The structures of the control equipment 5 and the electrolytic polishing equipment 6 have been described above, so they will not be described again:

First of all, the present invention is used in the electrolytic polishing of the surface of conductive workpieces. Through the process of frequency conversion electrolysis, molecules of different materials attached to the surface of the conductive workpiece are electrolytically separated to restore the original surface color of the conductive workpiece, and repeat the above actions to Achieve the function of fast polishing;

Furthermore, when processing the metal surface, the current frequency conversion voltage is used to make the surface material of the conductive workpiece be electrolytically separated during the electrolysis process, and the frequency conversion function is used to respond to different depths of polishing processing, which causes the metal surface to restore its luster;

So far, the present invention can summarize the following characteristics from the above:

1. The present invention is used for metal surface treatment, using the principle of active polarization in the reciprocating electrolysis method to separate the carbon molecules and non-metallic substances attached to the metal surface of the conductive workpiece, restore the luster of the metal surface of the conductive workpiece, and reduce the number of workpieces loss;

2. The present invention is different from ordinary electrolytic polishing, and is more stable and fast polishing. It uses the functions of current frequency conversion and voltage transformation to change the polishing power, and then responds to the surface of the workpiece with different roughness;

In particular, the electrolytic polishing equipment 6 of the present invention can directly assemble a general electrolyte tank, so that the entire surface of the conductive workpiece can be electropolished at the same time, and the molecules of different materials attached to the surface of the conductive workpiece are electrolytically separated to reduce the conductivity. The original surface color of the workpiece.

So far, the frequency conversion polarization polishing device and method of the present invention have the following effects:

The present invention is suitable for electro-polishing equipment. The power supply module 1 is provided with the power connection terminal 11, and the power supply module 1 is used to convert alternating current to direct current. The inverter 2 and the power supply module 1 is in an electrical connection state, the inverter 2 converts the direct current output from the power supply module 1 into alternating current; the frequency control device 3 is in an electrical connection state with the inverter 2, and the frequency control device 3 controls The inverter 2 outputs the frequency of alternating current; the voltage control device 4 is electrically connected to the inverter 2, and the voltage control device 4 controls the voltage of the inverter 2 to output alternating current; the control device 5, It is electrically connected to the frequency control device 3 and the voltage control device 4, the control device 5 controls the predetermined frequency of the alternating current of the frequency control device 3, and the control device 5 controls the predetermined voltage of the alternating current of the voltage control device 4; The electrolytic polishing equipment 6 is electrically connected to the inverter 2 and uses the alternating current output from the inverter 2 to directly process the electrolytic polishing equipment 6 on the surface of the workpiece with alternating current; thereby, a frequency conversion electrode is provided Chemical polishing device and method, in particular, refers to a method that uses frequency conversion to change the frequency and voltage of the processing current during the polishing process to achieve the purpose of stable polishing.

In summary, it should be known that the invention can indeed be widely used by related industries, it is highly progressive and novel, and the invention has not been disclosed before the application, in order to comply with the provisions of the Patent Law. The above is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention; that is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention should still fall within the scope of the patent of the present invention. Inside.

Claims

A frequency conversion polarization polishing device is characterized in that it has:

A power supply module, which is provided with a power connection end, the power connection end is electrically connected to the power supply, so that current is introduced into the power supply module from the power connection end, and the power supply module outputs direct current; an inverse frequency converter, which It is electrically connected with the power supply module, the direct current output by the power supply module is introduced into the inverter, and the inverter outputs alternating current with adjustable frequency; a frequency control device is connected to the inverter In a sexual connection state, the frequency control device is used to control the frequency of the alternating current output by the inverter; a control device is electrically connected to the frequency control device, and the control device controls the predetermined frequency of the alternating current of the frequency control device; and , An electrolytic polishing equipment, which is electrically connected to the inverse frequency converter, uses the frequency-converted and variable-voltage alternating current output from the reverse frequency converter to directly process the electrolytic polishing equipment on the surface of the workpiece at a predetermined frequency and voltage of alternating current .
The frequency conversion polarization polishing device of claim 1, wherein a slow start device is added between the inverted frequency converter and the electrolytic polishing equipment, and the slow start device is electrically connected to the inverted frequency converter and the electrolytic polishing equipment. In a sexual connection state, the slow start device controls the voltage and current output by the inverter to increase gradually to a predetermined output voltage and current.
3. The frequency conversion polarization polishing device of claim 2, wherein the slow start device is provided with a plurality of adjusting elements, and each adjusting element controls the current frequency gradually increasing value and the voltage gradually increasing value, and the slow start The device is provided with at least one display, and each display displays the increasing value of the current frequency and the increasing value of the voltage.
The frequency conversion polarization polishing device of claim 1, wherein a voltage control device is provided between the power supply module and the inverter, and the voltage control device is electrically connected to the power supply module and the inverter. In a sexual connection state, the voltage control device is provided with at least one variable resistor, and the voltage control device is electrically connected to the control device.
4. The frequency conversion polarization polishing device of claim 4, wherein the control device is provided with a plurality of adjustment elements, each adjustment element respectively controls a predetermined current frequency and a predetermined voltage value, and the control device is provided with at least A display, each display shows the value of the predetermined current frequency and the predetermined voltage.
The frequency conversion polarization polishing apparatus of claim 1, wherein the AC current output by the electrolytic polishing equipment has a frequency waveform of any one of sine wave, modified sine wave, triangular wave, ripple wave or square wave Or any combination of waveforms.
A frequency conversion polarization polishing method is characterized by the following steps: a) Power supply rectification: Connect a power supply module to the power supply and convert the output current of the power supply into direct current through the power supply module; b) Set value: use A frequency control device sets a predetermined current frequency, and a voltage control device sets a predetermined voltage. The frequency control device and the voltage control device control the current frequency and voltage of the alternating current output by an inverter. The inverter and the The power module is in an electrically connected state, and the direct current output by the power module is led to the inverter, and the inverter outputs alternating current with a predetermined current frequency and a predetermined voltage; c) polarization polishing: the inverse inverter and an electrolytic The polishing equipment is in an electrical connection state. The electrolytic polishing equipment uses the alternating current output from the inverter to perform polarization polishing on the surface of the workpiece through the electrolyte; d) Finished product acquisition: take out the workpiece after polishing is completed and remove the electrolyte on the surface, In turn, a polished finished product is obtained.
8. The frequency conversion polarization polishing method of claim 7, wherein the electrolytic polishing equipment is provided with a current output terminal and a current return terminal, the current return terminal is clamped, clamped, pivoted or attached Either way, the current return end is electrically connected to the workpiece.
8. The frequency conversion polarization polishing method of claim 8, wherein the current output terminal is immersed in the electrolyte or brushed on the workpiece with a brush attached to the electrolyte to polish the surface of the workpiece.
8. The frequency conversion polarization polishing method of claim 7, wherein the power module is a wide-voltage rectifier, and the power connection end is connected to a power supply with a voltage of 90V to 240V.