WO2007051422A1

WO2007051422A1 - A rivet welding machine with low energy storing capacitor

Info

Publication number: WO2007051422A1
Application number: PCT/CN2006/002955
Authority: WO
Inventors: Jianping Wang
Original assignee: Zhang, Xiaobing
Priority date: 2005-11-04
Filing date: 2006-11-03
Publication date: 2007-05-10
Also published as: CN100395066C; CN1772426A

Abstract

A welding machine with both riveting and welding function has a casing, a power source input controlling circuit installed in the casing, and a welding code controlling circuit built in the secondary controlling circuit of the controlling circuit and used for regulating the welding code. The effect of the present invention is as follows: it can fast weld on the metal material such as A3 steel, stainless steel, aluminum alloy, pure aluminum and so on; it does not need any post treatment after welding; the workpieces after riveting and welding processes not only meet the technical requirements, but also have a clean and well-looking appearance, therefore avoiding the deformation that should not generate. Compared with the conventional welding method, its welding method may raise the welding efficiency to about 3 times. The workpieces after welding have a well-looking appearance, so the grinding process after welding is unnecessary. The material loss of the riveting and welding torch used may reduce 50%, therefore the welding cost may save 20%. Furthermore, it may perform welding successfully on such products that its technological requirements can not be meet by many other welding method.

Description

Riveting machine with low storage voltage

The present invention relates to a welding machine, and more particularly to a riveting machine with a low storage voltage.

Background technique

At present, in the international common sheet metal processing process, when many workpieces are processed, because the workpiece is large and thicker sheets are not allowed, since the workpiece is easily deformed, it is necessary to weld the reinforcing ribs on the welded workpiece. There are many disadvantages, such as the use of high-grade spot welder spot welding. Although the spot welding trace is slightly smaller, it is limited by the welding arm being too short, it is impossible to carry out long-span welding, and it will be affected by different plates. The effect of thick 悍 on the deformation of the thin plate side. Other types of welding deformations are more severe and difficult to achieve the desired results.

At present, the most advanced method is to use a direct discharge capacitor storage welder for riveting, but the existing direct discharge capacitor storage welder has a higher charging potential of the storage capacitor, during the riveting process. Since the rivet welding nail is formed in the welding nail hole with the workpiece S first, it will be in contact with the inner hole wall of the welding nail hole. Such rivet welding has little contact resistance with the inner wall of the welding nail hole on the workpiece. In the process of welding, the welding current of the welding machine is inevitably generated. The higher the welding voltage, the more serious the welding current of the welding machine is, and the contact state of the welding nail and the welding hole is different each time of welding. The difference in the shunting current of the welding machine also varies greatly, which will seriously affect the reliability and consistency of the welding. The lower the voltage, the smaller the shunting effect of the welding current of the welding machine. And the current rivet welding method is to cut a diameter in the upper part of the rivet welding nail, so as to facilitate cutting from the here when the welding is completed, the diameter is reduced. At the same time, the cylindrical body of a certain length is processed at the same time for cardging while ensuring good electrical contact. Once the welding is completed, the upper cylindrical body needs to be cut from the reduced diameter and ground for grinding, which is not aesthetically pleasing, and increases the workload and waste of energy due to grinding. At the same time, due to the complicated diameter reduction section and the upper cylindrical body, the processing of the rivet welding nail is complicated, the manufacturing cost is high, the cut reduced diameter section and the upper cylindrical body are discarded, resulting in at least 50% waste of raw materials and 90% due to complicated processing technology. Waste of manufacturing man-hours. Moreover, when the thickness of the welded plate is thin and the surface of the stainless steel is required to be welded, the cutting workpiece and the grinding process may cause severe deformation of the welded workpiece.

Summary of the invention

In order to solve the problems in the above technology, the object of the present invention is to provide a low-energy storage voltage riveting machine, which is advantageous for improving welding efficiency, preventing workpiece deformation, reducing the manufacturing cost of the welding nail, saving raw materials and reducing energy consumption. , Control welding specifications, adapt to different welding workpieces.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a riveting machine with a low storage voltage, which comprises a casing of a welding machine, and an input system control circuit for introducing a power source of the welding machine is arranged in the casing. The primary control circuit of the control circuit comprises an input power plug, a power cable, an input power quick plug, an input power fast socket, a main power switch, a main power contactor, a main power isolation transformer; and a secondary control circuit of the control circuit includes There are secondary welding negative cable socket, secondary welding negative cable plug, secondary welding negative connection device, secondary positive cable socket, secondary welding positive cable plug, secondary control integrated circuit; also includes charging main circuit control circuit and a charging circuit controls an integrated charging control circuit of the integrated circuit, wherein: the control unit of the welding machine The secondary control circuit of the road is further connected with a splicing size specification control circuit, which adjusts the welding specification; the welding size specification control circuit includes a size specification control switch, a welding small specification control relay and a discharge buffer relay, The pre-conducting resistance of the discharge thyristor, when the size specification control switch is dialed to the large welding specification, the common terminal of the control switch of the welding size specification control circuit is connected to the positive pole of the charging control circuit, and the size specification control switch is normally closed At one end of the large specification indicator, the other end of the large specification indicator is connected to the negative pole of the secondary control circuit, so that the large specification indicator is electrically lit to show the large specification welding working state; the welding size specification control is turned to the welding In the small specification state, the common contact of the buffer relay in the secondary control circuit of the control circuit is connected to one end of the welding small specification relay coil, and the other end of the normally open contact of the buffer relay in the secondary control circuit of the control circuit Connected to the negative pole of the control circuit, soldering the other end of the small specification relay coil and soldering The normally open contact of the control gate is connected, the common end of the welding small specification control switch is connected with the positive pole of the secondary control circuit, and the welding small specification relay is often connected with one end of the contact and the discharge thyristor cathode, and the welding is small. The other end of the normally open contact of the specification relay is connected to one end of the discharge pre-conductive resistance, and the other end of the discharge pre-conduction resistance is connected with the negative pole of the charging main circuit to convert the size welding specification.

The effect of the invention is that the direct discharge capacitor energy storage riveting machine can be quickly welded on metals such as A3, stainless steel, aluminum alloy, pure aluminum, etc., and the welding method has high efficiency, preventing undue deformation of the welding workpiece, so that after welding The workpiece is beautiful in appearance and does not require post-weld grinding. The working efficiency is increased by about 3 times, the material consumption of the used welding studs is reduced by 50%, and a large amount of high-quality steel is saved. The welding cost is about 20% of the original method, and Welding can be carried out smoothly on many other products where the welding method cannot complete the process requirements. DRAWINGS

1 is a schematic view showing the structure of a welding machine of the present invention.

detailed description

The low-energy-voltage voltage welding machine of the present invention will be described with reference to the accompanying drawings and embodiments.

As shown in FIG. 1, the low-energy storage voltage riveting machine of the present invention is a direct discharge type capacitor energy storage riveting machine, and the primary circuit of the welding machine control circuit is composed of an input power supply plug, a power cable, and a primary control circuit. Input power quick plug, input power fast socket, main power switch Kl, main power contactor CJ1, main power isolation transformer B1, secondary charging control circuit, the control circuit includes: charging main circuit control circuit 12, charging circuit control integration Circuit, secondary welding negative cable socket, secondary welding negative cable plug, secondary welding negative connection device, secondary positive cable socket, secondary welding positive cable plug, secondary control integrated circuit, secondary control circuit in the welding machine A welding size specification control circuit is connected in the circuit, and the circuit adjusts the welding specification. The welding size specification control circuit includes a size specification control switch K2, a small specification control relay J4 and a discharge buffer relay J3, and a discharge thyristor. Pre-conductive resistance R17 of BG1. When the size specification control switch 2 is dialed to the large welding specification, the control switch K2 of the welding size specification control circuit is commonly connected to the positive terminal of the charging control circuit, and the size specification control switch K2 is normally closed to the end of the large specification indicator ZD6-1. The other end of the large specification indicator ZD6-1 is connected to the negative pole of the secondary control circuit, so that the large specification indicator ZD6-1 is electrically lit to show the large specification welding working state; the welding size specification control switch K2 is set to the small welding In the normal state, the constant contact J3 of the buffer relay J3 in the secondary control circuit of the control circuit and the small welding specification One end of the relay J4 coil is connected, and the other end of the common contact J3 of the buffer relay J3 in the secondary control circuit of the control circuit is connected with the negative pole of the control circuit, and the other end of the small-sized relay J4 coil is welded and controlled by welding. The normally open contact K2- 2 of the switch K2 is connected, the common end of the welding small specification control K2 is connected with the positive pole of the secondary control circuit, and the welding small specification relay J4 normally open contact J4- 1 end and discharge controllable The silicon cathode is connected, the other end of the welding small specification relay J4 normally open contact J4-1 is connected with one end of the discharge pre-conductive resistance R17, and the other end of the discharge pre-conductive resistance R17 is connected with the negative pole of the charging main circuit, thereby realizing the size. Fast conversion of welding specifications.

The pre-conducting path is provided for the discharge thyristor BG1, so that the discharge thyristor BG1 is turned on in advance, which will greatly shorten the discharge time and reduce the depth of the weld puddle. The size specification control switch K2 will normally close the contact, and the positive control circuit of the small-scale control relay J4 will be provided by the positive control of the control circuit with the size specification. In the welding work, the small-scale control relay J4 is connected to the welding size specification. The normal terminal of the switch K2, so the working positive voltage can not be obtained, the small specification control relay J4 does not pull, and its normally open contact J4-1 disconnects the pre-conductive resistance R17 from the discharge controllable silicon BG1 cathode. The discharge control silicon BG1 is not pre-conducted, so the welding discharge time is lengthened, the weld pool is deep, and the welding strength is increased.

Insert the quick power cable plug into the fast power socket CZ1, plug the power cable plug into the power socket through the power cable 36, turn on the main power switch Kl, the main power transformer B1 is powered, and the secondary side L2, L3, L4 of the main power transformer generates induction. Voltage. The charge main circuit control circuit 12 charges the storage capacitor C1 under the control of the charge control integrated circuit 13. Adjust the charge adjustment potentiometer Wl, adjust the center of the potentiometer W1 and control The negative electrode of the circuit takes a voltage signal under the voltage division of the voltage dividing resistor R11 and the voltage dividing resistor R13, and compares the reference potential set in the charging control integrated circuit 13 itself. When the predetermined value is reached, the trigger signal of the charging main circuit control circuit is blocked. According to the actual requirements of the workpiece being rivet welded, the welding specifications of the welder are adjusted. The welding size specification control circuit includes a size specification control switch K2, a welding small specification control relay J4, and a discharge buffer relay J3, a discharge thyristor BGl pre-conductive resistance R17, and when the size specification control switch K2 is set to a large welding specification, The welding size specification control circuit control switch K2 is commonly connected to the positive pole of the control circuit, the size specification control switch K2 is normally closed to one end of the large specification indicator ZD6 1, and the other end of the large specification indicator ZD6-1 is connected to the negative of the control circuit. Therefore, the large specification indicator ZD6-1 is electrically lit to show the large specification welding working state.

Since the small specification control relay J4 is connected to the normally open end of the welding size specification switch K2, the working positive voltage cannot be obtained, and the small specification control relay: [4 does not pull, its normally open contact J4-1 will be pre-conductive resistance R17 It is disconnected from the discharge controllable silicon BG1 cathode, so that the silicon BG1 can be controlled to be pre-conducted by the discharge, so the welding discharge time is elongated, the weld pool is deep, and the welding strength is increased.

When the welding size specification control switch K2 is set to the small welding specification state, the size specification control switch K2 normally open contact will be closed, and the positive polarity path is provided by the control circuit positive polarity control gate K2 for the small specification control relay J4. In the welding work, due to the closing of the buffer relay J3, its normally open contact J3-1 is closed, so that the small gauge circuit relay J4 is electrically connected, and the small gauge circuit relay J is always closed with the contact J4-1, which will discharge the pre-conductor. The through resistance is connected to the discharge thyristor cathode to provide a pre-conducting path for the discharge thyristor BG1, so that the discharge thyristor BG1 is turned on in advance, which will greatly shorten the discharge time and reduce the welding. Connect the depth of the weld pool.

This low-energy-voltage riveting machine uses a direct discharge capacitor energy storage method for riveting. Its welding feature is to first reduce the power frequency electrical energy using an isolated power transformer. The AC energy is converted into DC power through a rectifier, and the storage potential and the charging waveform of the dedicated storage capacitor are controlled by a control circuit. The charging potential charging waveform of the dedicated storage capacitor is adjusted by the precise internal potential signal of the welding machine, and the effect of the stored energy charging potential and the current waveform is closed-loop compensated due to the change of the external power supply network. When the energy storage potential on the energy storage capacitor reaches a predetermined value, the workpiece to be welded is welded, and after the welding is completed, no subsequent processing is required.

The rivet welding nail used in the low-storage voltage riveting machine is a component consisting of a pilot arc bump and a thickness-positioning cylindrical body and a fastening contact platform, and the processing process can be formed by one cold pier, because the whole The height is greatly reduced, and there is no pre-disengaged part when the raw material is cut, and the overall diameter is relatively close, so the cold rolling pressure is also smaller than the original rivet welding nail, and the processing speed is greatly improved. At the same time, the workpiece after the rivet welding process meets the requirements of the technical specifications, and the appearance is clean and beautiful, without grinding, completely eliminating the deformation that should not occur.

Claims

Claim

A welding machine with a rivet welding function, comprising a casing having a splicing machine, wherein an input system control circuit for introducing a power source of the welding machine is installed in the casing, and a primary control circuit of the control circuit includes There are input power plug, power cable, input power quick plug, input power fast socket, main power switch (K1), main power contactor (CJ1), main power isolation transformer (B1); the secondary control circuit of the control circuit includes Secondary welding negative cable socket, secondary welding negative cable plug, secondary welding negative connection device, secondary positive cable socket, secondary welding positive cable plug, secondary control integrated circuit; also includes charging main circuit control circuit (12 And a charging circuit control integrated circuit secondary charging control circuit, characterized by:

In the secondary control circuit of the control circuit of the welding machine, a welding size specification control circuit is further connected, and the circuit adjusts the welding specification; the welding size specification control circuit includes a size specification control switch (K2), and the welding is small. Specification control relay (J4) and discharge buffer relay (J3), discharge thyristor (BG1) pre-conductive resistance (R17), when the size specification control switch (K2) is dialed to the large welding specification, the welding size specification control circuit The common terminal of the control switch (K2) is connected to the positive pole of the charging control circuit, and the size specification control switch (K2) is normally closed to one end of the large specification indicator (ZD6-1), and the large specification indicator (ZD6-1) The other end of the circuit is connected to the negative pole of the secondary control circuit, so that the large specification indicator (ZD6-1) is electrically lit to show the large specification welding working state; when the welding size specification control switch (K2) is set to the welding small specification state , through the common contact (J3-1) of the buffer relay (J3) in the secondary control circuit of the control circuit, connected to one end of the coil of the welding small specification relay (J4), and control the electricity A secondary control relay buffer (J3) of the circuit The other end of the normally open contact (J3- 1 ) is connected to the negative pole of the control circuit, and the other end of the welded small gauge relay (J4) coil is connected to the normally open contact (K2 - 2) of the welding small specification control switch (K2). The common end of the welding small specification control switch (K2) is connected to the positive pole of the secondary control circuit, and the welded small specification relay (J4) normally open contact (J4-1) is connected at one end to the discharge thyristor cathode, and the welding is small. Specification relay (J4) normally open contact (J4- 1) The other end is connected to the discharge pre-on-resistance (R17)-end, and the other end of the discharge pre-on-resistance (R17) is connected to the negative pole of the charging main circuit to make the size The welding specification is converted.

2. The low energy storage voltage riveting machine according to claim 1, wherein: the welding machine has a charging voltage of 10-70 volts continuously adjustable.