CN202607041U

CN202607041U - Inverted manual arc welding machine of insulated-gate bipolar transistor

Info

Publication number: CN202607041U
Application number: CN 201220078211
Authority: CN
Inventors: 郭少朋; 张通淼
Original assignee: SHANGHAI HUTONG ENTERPRISE GROUP CO Ltd
Current assignee: SHANGHAI HUTONG ENTERPRISE GROUP CO Ltd
Priority date: 2012-03-05
Filing date: 2012-03-05
Publication date: 2012-12-19
Anticipated expiration: 2022-03-05

Abstract

The utility model relates to an inverted manual arc welding machine of an insulated-gate bipolar transistor. The inverted manual arc welding machine of the insulated-gate bipolar transistor comprises a shell, a primary inverted operation mechanism, a secondary inverted operation mechanism and a middle-layer plate, wherein the primary inverted operation mechanism, the secondary inverted operation mechanism and the middle-layer plate are respectively arranged in the shell. The inverted manual arc welding machine of the insulated-gate bipolar transistor, which is disclosed by the utility model, enables the output current to be more stable through constant current output, reduces the influence of arc length waviness on the current through fast dynamic response and has the advantages of reasonable static external characteristics, good dynamic property, easy arc starting, stable electric arc, high welding quality, high self-adjustment capability, continues and adjustable welding current, little workpiece deformation, beautiful welding seam forming, wide application range, small size, light weight, flexible and easy operation, suitability for various operating environments and the like.

Description

Igbt inversion manual arc welding machine

Technical field

The utility model relates to a kind of welding machine, is specifically related to a kind of igbt inversion manual arc welding machine.

Background technology

Present manual arc welding machine (except that AC welding set) also has a big chunk to use controllable silicon (Silicon Controlled Rectifier; The power supply of industrial frequency rectifying abbreviation SCR); Because the silicon controlled switching frequency is 50-60HZ, so main transformer is very big and heavy.By U=4.44NBSf formula (input voltage of U indication transformer wherein, N is the coiling number of turn, S is that the core section of transformer is long-pending, f is a frequency of input voltage, B is the magnetic induction intensity of iron core).Can know: under the constant situation of U, B and N, f increases, and then S reduces.Power frequency is 50Hz; And insulated gate bipolar transistor (Insulated Gate Bipolar Transistor; Abbreviation IGBT) switching frequency is 20000Hz; It is thus clear that under the identical situation of other conditions, the main transformer of the inverter of IGBT can be littler about 400 times than the main transformer of industrial frequency rectifying.It is thus clear that this industrial frequency rectifying power supply consumptive material, power consumption, big, the Heavy Weight of volume.

Inversion transformation technique is used for the source of welding current nearly two about ten years, is controllable silicon (SCR) inversion originally.Because reverse frequency is not high to make that volume is big, Heavy Weight, cost are high, has stopped producing at present.The manual electric arc welding power supply of existing technical grade adopts the IGBT module mostly.The operating frequency of IGBT module is not high, is generally 18000Hz, and conduction voltage drop is also higher, and anti-breakdown capability is not high, so source of welding current volume is not easy to do for a short time, and IGBT module caloric value is high, and peak voltage is also high, and it is also complicated to absorb circuit.

Therefore, provide a kind of volume little, in light weight, safe in utilization, have the welding equipment of good welds performance just to seem particularly important again simultaneously.

In view of the above problems, the utility model discloses a kind of igbt inversion manual arc welding machine.It has technical characterictic as mentioned below, to solve existing problem.

The utility model content

The purpose of the utility model provides a kind of igbt inversion manual arc welding machine, and it is that volume is little, in light weight, fault rate is low, well behaved argon arc, manual arc welding machine.

The purpose of the utility model igbt inversion manual arc welding machine realizes through following technical scheme: a kind of igbt inversion manual arc welding machine; Comprise housing, inversion operating mechanism, secondary inversion operating mechanism and a la m, a described inversion operating mechanism, secondary inversion operating mechanism and la m are separately positioned in the housing.

Described housing is made up of front panel, rear board, two side panels, top board and base plates, and described front panel is provided with display board, ammeter, power supply indicator, protection indicator lamp, push current potentiometer, welding current potentiometer, "+" cable connecting terminal and "-" cable connecting terminal.

Described display board is arranged on the top of front panel; Described ammeter is positioned at the central authorities of display board; Described power supply indicator and protection indicator lamp are arranged on the display board; And lay respectively at the both sides of ammeter, described push current potentiometer and welding current potentiometer are arranged on the display board, and lay respectively at the below of power supply indicator and protection indicator lamp; Described "+" cable connecting terminal and "-" cable connecting terminal lay respectively at the left and right sides, bottom of front panel.

Above-mentioned igbt inversion manual arc welding machine, wherein, described rear board is provided with input wires terminal, air switch, blower fan and earth stud; Described input wires terminal and air switch are separately positioned on the left and right sides on rear board top, and described blower fan is arranged on the central authorities of rear board, described earth stud rear board bottom one side.

Above-mentioned igbt inversion manual arc welding machine, wherein, a described inversion operating mechanism comprises left radiator, rectifier bridge, electrodeless electric capacity and IGBT module; Described rectifier bridge is arranged on the la m; Described electrodeless electric capacity is arranged on the la m, is positioned at rectifier bridge one side; Described IGBT module is arranged on the left radiator.

Above-mentioned igbt inversion manual arc welding machine, wherein, described secondary inversion operating mechanism comprises right radiator, main transformer, secondary cowling panel, current transformer and current divider; Described main transformer is arranged at the front end of base plate; Described secondary cowling panel is arranged on the right radiator; Described current transformer is through the elementary line of main transformer; Described current divider is arranged between main transformer and "-" cable connecting terminal.

Above-mentioned igbt inversion manual arc welding machine wherein, also is respectively equipped with main control circuit, drive circuit, handgrip control transformer on the described la m; Described handgrip control transformer is arranged on the central authorities of described la m, and described drive circuit is arranged on the bottom of la m, and described main control circuit is arranged on the front end of described la m; Described main control circuit drive circuit respectively is connected with the handgrip control transformer.

Above-mentioned igbt inversion manual arc welding machine; Wherein, The external 380V three-phase alternating-current supply of described input wires terminal; Three outputs of described input wires terminal respectively with the corresponding connection of three inputs of air switch; Three outputs of described air switch respectively with the corresponding connection of three inputs of rectifier bridge, the three-phase output end of described rectifier bridge is transported to the electrodeless electric capacity two ends respectively with direct current, described electrodeless electric capacity two ends are connected with the input positive and negative polarities of IGBT module respectively; Described drive circuit is connected with IGBT module, and the primary and secondary two ends of described main transformer connect IGBT module and secondary cowling panel respectively; One end of described main transformer is connected with current divider; The other end of described main transformer is connected with the secondary cowling panel; The output of described secondary cowling panel is connected with "+" cable connecting terminal, and described main control circuit is connected with the handgrip control transformer, and the input of described drive circuit is connected with the output of main control circuit; Elementary and the current transformer of described main transformer is connected, and the output of described current transformer is connected with main control circuit.

The utility model igbt inversion manual arc welding machine makes it compared with prior art owing to adopted such scheme, has following advantage and good effect:

1, the utility model igbt inversion manual arc welding machine constant current output makes output current more steady; Dynamic response speed is fast, reduces the influence of arc length waviness to electric current.

2, the utility model igbt inversion manual arc welding machine has rational quiet external characteristics and good dynamic characteristics, makes the starting the arc easy, arc stability; Welding quality is high, and self-adjusting ability is strong, and welding current is adjustable continuously; Workpiece deformation is little, and appearance of weld is attractive in appearance etc.

3, the utility model igbt inversion manual arc welding machine has wide range of applications, and volume is little, and is in light weight, and flexible operation is simple, is applicable to various operating environments.

Below; To do further explanation through concrete embodiment; Yet embodiment only is giving an example of the optional embodiment of the utility model, and its disclosed characteristic only is used to explain and set forth the technical scheme of the utility model, and is not used in the protection domain that limits the utility model.

Description of drawings

In order better to understand the utility model, the accompanying drawing for your guidance that can quote with reference to this specification, in the accompanying drawing:

Fig. 1 is the front view of the utility model igbt inversion manual arc welding machine.

Fig. 2 is the rearview of the utility model igbt inversion manual arc welding machine.

Fig. 3 is the left view of the utility model igbt inversion manual arc welding machine.

Fig. 4 is the right view of the utility model igbt inversion manual arc welding machine.

Fig. 5 is each member principle figure of the utility model igbt inversion manual arc welding machine.

Fig. 6 is the circuit theory diagrams of the utility model igbt inversion manual arc welding machine.

The specific embodiment

Be further described below in conjunction with the specific embodiment of accompanying drawing the utility model:

See also shown in accompanying drawing 1, accompanying drawing 2 and the accompanying drawing 3; The utility model igbt inversion manual arc welding machine comprises housing 01, inversion operating mechanism 02, secondary inversion operating mechanism 03 and a la m 04, and a described inversion operating mechanism 02, secondary inversion operating mechanism 03 and la m 04 are separately positioned in the housing 01; Described housing 01 is made up of front panel 011, rear board 012, two side panels, top board and base plates 013, and described front panel 011 is provided with display board 0111, ammeter 0112, power supply indicator 0113, protection indicator lamp 0114, push current potentiometer 0115, welding current potentiometer 0116, "+" cable connecting terminal 0117 and "-" cable connecting terminal 0118; Described display board is arranged on the top of front panel 011; Described ammeter 0112 is positioned at the central authorities of display board 011; Described power supply indicator 0113 and protection indicator lamp 0114 are arranged on the display board 011; And lay respectively at the both sides of ammeter 0112, described push current potentiometer 0115 and welding current potentiometer 0116 are arranged on the display board 011, and lay respectively at the below of power supply indicator 0113 and protection indicator lamp 0114; Described "+" cable connecting terminal 0117 and "-" cable connecting terminal 0118 lay respectively at the left and right sides, bottom of front panel 011.

After the main frame energized, power supply indicator 0113 is that bright demonstration main frame is in the energising duty; After protection indicator lamp 0114 was bright, main frame got into guard mode, quits work; Welding current potentiometer 0116 is being controlled the size of given electric current, and welding current potentiometer 0116 is when turning clockwise, and given electric current increases, otherwise, then diminish.

Described rear board 012 is provided with input wires terminal 0121, air switch 0122, blower fan 0123 and earth stud 0124; Described input wires terminal 0121 and air switch 0122 are separately positioned on the left and right sides on rear board 012 top, and described blower fan 0123 is arranged on the central authorities of rear board 012, described earth stud 0124 rear board 012 bottom one side.

Air switch 0122 plays overcurrent protection, is used for when serious overload or short circuit take place, tripping, and 0123 pair of heater members of blower fan plays the pressure cooling purpose.

Main transformer 032 is used for being transformed into lower intermediate frequency square-wave voltage to the intermediate frequency square-wave voltage of the inverter of above-mentioned IGBT module 024 output; The iron core of main transformer 032 can adopt nanocrystalline material, compares with ferrite, and it has saturation induction density Bm height; Loss is low; Magnetic conductivity is high, advantages such as Heat stability is good, and the primary and secondary coil of main transformer 032 adopts the parallel connection of multiply enamel-covered wire.

Also be respectively equipped with main control circuit 05, drive circuit 06, handgrip control transformer 07 on the described la m 04; Described handgrip control transformer 07 is arranged on the central authorities of described la m 04, and described drive circuit 06 is arranged on the bottom of la m 04, and described main control circuit 05 is arranged on the front end of described la m 04; Described main control circuit 05 drive circuit 06 respectively is connected with handgrip control transformer 07.

A described inversion operating mechanism 02 comprises left radiator 021, rectifier bridge 022, electrodeless electric capacity 023 and IGBT module 024; Described rectifier bridge 022 is arranged on the la m 04, is used for being transformed into DC voltage to alternating voltage; Described electrodeless electric capacity 023 is arranged on the la m 04, is positioned at rectifier bridge 022 1 sides, is used for the voltage of rectification is become more level and smooth DC voltage; Described IGBT module 024 is arranged on the left radiator 021, is used for converting the DC voltage of exporting after the above-mentioned rectification to the intermediate frequency square-wave voltage, and this transfer process is called inversion.

Described secondary inversion operating mechanism 03 comprises right radiator 031, main transformer 032, secondary cowling panel 033, current transformer and current divider 034; Described main transformer 032 is arranged at the front end of base plate 013; Described secondary cowling panel 033 is arranged on the right radiator 031, and the medium-frequency pulse voltage transition is become the required DC voltage of welding; Described current transformer is given main control circuit 05 delivered current signal through the elementary line of main transformer 032, is used for overcurrent protection; Described current divider 034 is arranged between main transformer 032 and "-" cable connecting terminal 0118, plays the effect of current feedback.

Main control circuit 05 is made up of circuit such as welding current given circuit, current feedback circuit, overtemperature protections, adopts plastic column that main control circuit 05 and la m 04 are kept apart.

See also shown in accompanying drawing 4 and the accompanying drawing 5; Described input wires terminal 0121 external 380V three-phase alternating-current supply; Three outputs of described input wires terminal 0121 respectively with the corresponding connection of three inputs of air switch 0122; Three outputs of described air switch 0122 respectively with the corresponding connection of three inputs of rectifier bridge 022; The three-phase output end of described rectifier bridge 022 is transported to electrodeless electric capacity 023 two ends respectively with direct current, and described electrodeless electric capacity 023 two ends are connected with the input positive and negative polarities of IGBT module 024 respectively, and IGBT module 024 converts the DC voltage of exporting after the rectification to the intermediate frequency square-wave voltage; Described drive circuit 06 is connected with IGBT module 024; Main control circuit 05 drives signal according to the requirement of given electric current to drive circuit 06 transmission, and drive circuit 06 will go out to deliver to IGBT module 024 after will driving signal shaping, amplification; Drive IGBT module 024 operate as normal; The primary and secondary two ends of described main transformer 032 connect IGBT module 024 and secondary cowling panel 033 respectively, and main transformer 032 is transformed into lower intermediate frequency square-wave voltage with the intermediate frequency square-wave voltage of the inverter output of IGBT module 024, is transported to after the step-down in the secondary cowling panel 033; The electric current of 033 pair of input of secondary cowling panel carries out rectification, and the electric current after the rectification is exported; One end of described main transformer 032 is connected with current divider 034, and current divider 034 will feed back to main control circuit 05 through its current signal, thus the output of control actual current; The other end of described main transformer 032 is connected with secondary cowling panel 033; Alternating current is become the required direct current of welding, and the output of described secondary cowling panel 033 is connected with "+" cable connecting terminal 0117, and described main control circuit 05 is connected with handgrip control transformer 07; The input of described drive circuit 06 is connected with the output of main control circuit 05; Elementary and the current transformer of described main transformer 032 is connected, and the output of described current transformer is connected with main control circuit 05, and current transformer is to main control circuit 05 transmission current feedback signal; Prevent the major loop overcurrent, play the effect of overcurrent protection.

The effect of main control circuit 05 is to come the accurately size of control output current with the size of given electric current; Just confirm to send into the voltage signal size of drive circuit 06 with the size of welding current set-point; And be subject to the size of current feedback; When current feedback value during greater than the welding current set-point, then no signal output; Carry out the effect of logic control to haveing suffered welding process in addition in addition, also have the effect that secondary cowling panel 033 is controlled and driven simultaneously, handgrip control transformer 07 provides required power supply for main control circuit 05.Blower fan 0123 is provided with the fan power feeding plate, for blower fan 0123 and handgrip control transformer 07 provide required power supply.

Drive circuit 06 removes to control the width of the trigger impulse of IGBT module 024 with the signal magnitude of main control circuit 05, thus the size that the conducting width of control IGBT module 024 is regulated output current.Trigger impulse has or not and also was subject to flow restriction, and certain pulse value of the output of IGBT module 024 just is during greater than the maximum set, then triggerless pulse output, and visible this just realized Pulse by Pulse control.

In sum, the utility model igbt inversion manual arc welding machine constant current output makes output current more steady; Dynamic response speed is fast, reduces the influence of arc length waviness to electric current; The utility model has rational quiet external characteristics and good dynamic characteristics, makes the starting the arc easy, arc stability, and welding quality is high, and self-adjusting ability is strong, and welding current is adjustable continuously, and workpiece deformation is little, and appearance of weld is attractive in appearance etc.; The utility model has wide range of applications, and volume is little, and is in light weight, and flexible operation is simple, is applicable to various operating environments.

Foregoing is the enumerating of specific embodiment of the utility model igbt inversion manual arc welding machine, for the wherein not equipment of detailed description and structure, is to be understood that to taking existing common apparatus in this area and universal method to implement.

Claims

1. igbt inversion manual arc welding machine; It is characterized in that: comprise housing (01), an inversion operating mechanism (02), secondary inversion operating mechanism (03) and la m (04), a described inversion operating mechanism (02), secondary inversion operating mechanism (03) and la m (04) are separately positioned in the housing (01);

Described housing (01) is made up of front panel (011), rear board (012), two side panels, top board and base plates (013), and described front panel (011) is provided with display board (0111), ammeter (0112), power supply indicator (0113), protection indicator lamp (0114), push current potentiometer (0115), welding current potentiometer (0116), "+" cable connecting terminal (0117) and "-" cable connecting terminal (0118);

Described display board is arranged on the top of front panel (011); Described ammeter (0112) is positioned at the central authorities of display board (011); Described power supply indicator (0113) and protection indicator lamp (0114) are arranged on the display board (011); And lay respectively at the both sides of ammeter (0112); Described push current potentiometer (0115) and welding current potentiometer (0116) are arranged on the display board (011), and lay respectively at the below of power supply indicator (0113) and protection indicator lamp (0114); Described "+" cable connecting terminal (0117) and "-" cable connecting terminal (0118) lay respectively at the left and right sides, bottom of front panel (011).

2. igbt inversion manual arc welding machine according to claim 1 is characterized in that: described rear board (012) is provided with input wires terminal (0121), air switch (0122), blower fan (0123) and earth stud (0124); Described input wires terminal (0121) and air switch (0122) are separately positioned on the left and right sides on rear board (012) top; Described blower fan (0123) is arranged on the central authorities of rear board (012), described earth stud (0124) rear board (012) bottom one side.

3. igbt inversion manual arc welding machine according to claim 2 is characterized in that: a described inversion operating mechanism (02) comprises left radiator (021), rectifier bridge (022), electrodeless electric capacity (023) and IGBT module (024); Described rectifier bridge (022) is arranged on the la m (04); Described electrodeless electric capacity (023) is arranged on the la m (04), is positioned at rectifier bridge (022) one side; Described IGBT module (024) is arranged on the left radiator (021).

4. igbt inversion manual arc welding machine according to claim 3 is characterized in that: described secondary inversion operating mechanism (03) comprises right radiator (031), main transformer (032), secondary cowling panel (033), current transformer and current divider (034); Described main transformer (032) is arranged at the front end of base plate (013); Described secondary cowling panel (033) is arranged on the right radiator (031); Described current transformer is through the elementary line of main transformer (032); Described current divider (034) is arranged between main transformer (032) and "-" cable connecting terminal (0118).

5. igbt inversion manual arc welding machine according to claim 4 is characterized in that: also be respectively equipped with main control circuit (05), drive circuit (06), handgrip control transformer (07) on the described la m (04); Described handgrip control transformer (07) is arranged on the central authorities of described la m (04), and described drive circuit (06) is arranged on the bottom of la m (04), and described main control circuit (05) is arranged on the front end of described la m (04); Described main control circuit (05) drive circuit (06) respectively is connected with handgrip control transformer (07).

6. igbt inversion manual arc welding machine according to claim 5; It is characterized in that: the external 380V three-phase alternating-current supply of described input wires terminal (0121); Three outputs of described input wires terminal (0121) respectively with the corresponding connection of three inputs of air switch (0122); Three outputs of described air switch (0122) respectively with the corresponding connection of three inputs of rectifier bridge (022); The three-phase output end of described rectifier bridge (022) is transported to electrodeless electric capacity (023) two ends respectively with direct current; Described electrodeless electric capacity (023) two ends are connected with the input positive and negative polarities of IGBT module (024) respectively; Described drive circuit (06) is connected with IGBT module (024), and the primary and secondary two ends of described main transformer (032) connect IGBT module (024) and secondary cowling panel (033) respectively; One end of described main transformer (032) is connected with current divider (034); The other end of described main transformer (032) is connected with secondary cowling panel (033); The output of described secondary cowling panel (033) is connected with "+" cable connecting terminal (0117); Described main control circuit (05) is connected with handgrip control transformer (07); The input of described drive circuit (06) is connected with the output of main control circuit (05), and the elementary and current transformer of described main transformer (032) is connected, and the output of described current transformer is connected with main control circuit (05).