TW467787B - Spot welding gun with timer - Google Patents

Abstract

This invention relates to a spot welding gun with timer, which the main objective it to provide the spot welding gun with a transformer and a timer and with the features of lightweight, small inertia, and enhanced operational performance. This spot welding gun comprises: an annual support 12 hung on a hanger of which the inner part appears to be in circular opening shape; a main body located in the opening 12a of the annual support 12, oriented in the direction of through the thickness of annual support, and fitted rotatably around the central axis of the opening 12a, to be held by the operator; electrode holders 20, 24 on the moving and fixed sides, provided at a side part 16a; electrodes 22, 26 on the front end of the electrode holders 20, 24, press welding each other with the predetermined pressure according to the movement of the electrode holder 24 of the moving side; a cylinder assembly 28 for driving an electricity conduction control means controlling the conduction between the electrodes 20, 24 and a moving side electrode holder 24 at a side opposite to a side part in the main body 16 that the annual support is located in between the two sides; a electricity conduction control means comprising a connector part 52 connected with an outer electric source, a timer 34 for regulating electricity conduction time and the current value between both electrodes 22, 26, a step-down transformer 40 for lowering the voltage from the outer electric source voltage to the control voltage, a main transformer 32 for lowering the voltage from the outer electric source voltage inputted from the connector part 52 to the welding voltage to be supplied to the electrode 22, 26, and a thyrister 44 for switching on/off the welding current generated by the main transformer 32 through the timer 34.

Description

S 7 787 5. Description of the invention (1) [Technical field to which the invention belongs]: The present invention relates to a spot welding gun, which is pressurized by the electrode through the electrode to be welded, and provides a large current to the electrode in a short time. Melting and welding local parts by resistance heating, especially the present invention relates to the point with a timer equipped with a timer for setting the energization time [known technique] First, as a type of resistance welding, in order to perform a thin plate shape Spot welding of metal plates is widely used. In particular, because this type of spot welding can be used for different types of genus genus, with less thermal impact, it can almost automatically receive detailed visits. Since there is no individual difference of the operator, a uniform welding junction can be obtained, especially as it is suitable for automobile manufacturing Excellent technology of technical automation is widely used. The method of energization in 一般 is generally to first preheat by passing a low current, and then 6: current into the welding. Here, the external power source uses 40,000 yen of 50 ～ 60 Ηζ = for electricity. For the voltage of the welding current, use a low voltage of 丨 〇ν or less. For carbon steel, use 10,000 to 50,000 amperes per square centimeter. The current value (a larger current value is used for a metal with a specific conductivity), and the energization time is set to a very short time such as 0.3 seconds. j ,, 'Transformer for voltage transformation, timing for correct determination of short energization time = necessary = But because they have weight, they are usually removed from the point-placed on the operating platform as an external device, etc., and connected by wires Spot welding. Six: At two o'clock, T grabber becomes lighter, but there are many wires connected to it, and the range of the business is limited. & solved this-problem if set

C: \ 2D-CODEWO-O2 \ 89123374.ptd Page 5 467787 Description of the five 'invention (2) Long connection wire, so special β ^ ^ When thick' becomes difficult to pull •, production: the second energy can be evil [Problems to be Solved by the Invention] Although: From this point of view, various methods of transformers have been studied. For example, 20,000 amps can be used. ^ In Hanbei, if the ΗΛ π county pulls Α to 80kg of water, it will be forwarded for suspension. Because it is difficult to ensure: "The operator must usually hold the welding. The present invention is to solve the above-mentioned problem. The main purpose of the present invention is to provide a spot welding grab with an id. The welding grab has a light internal structure, a small inertia, and improved operability. . The other purpose of 点点 二 .i Ming is to provide a spot welding torch with a timer. ^ Erjun is well balanced and does not substantially require an external posture maintenance method. [Solution to the problem] There is 3: to resolve the above issues' The above purpose is related to the present invention. Attachment: plus: spot welding, as described in the first scope of the patent application, it has: a ring bracket with a circular opening inside; and the main body, The main miscellaneous shape can pass through the opening of the annular support f in the thickness direction of the annular support, and can be freely rotated and installed around the central axis of the opening, and can be connected and held; a pair of arms at the fixed end and the movable end are provided at The 彡 ΒΠ γ f? H ττ / 1. · '+, Ban ... …… J Θ -Yue, 又 Yu Zhen Mu Factory /,-. ^ 衣 One side of the bracket; installed on the front electrode of each arm, so

C: \ 2D-Q3DE \ 90-02 \ 89123374 Page 6 4 6 7 787 V. Description of the invention (3) ~ --- The electrodes are crimped to each other at a predetermined pressure according to the movement of the movable end electrode holder; control the above The energizing control means for energizing between the two electrodes and the driving means for driving the movable end electrode holder are arranged on the main body, the one side and the other side of the phase, with a ring bracket between the two sides; the energizing control means It is characterized by having a connector element connected to an external power source, a timer that determines the time of energization and current between the two electrodes, a step-down transformer that steps down the external power supply voltage input from the connector element to a control voltage, and The external power supply voltage input from the connector element is reduced to a main transformer voltage of the welding voltage applied between the two electrodes, and the semiconductor switching element that turns on and off the welding current generated in the main transformer is turned on and off by the timer. ^ In the spot welding with a timer of the present invention, the driving means described in item 2 of the patent application has a cylinder device for the electrodes mounted on the movable end electrode holder and the fixed end electrodes. The electrodes on the holder are moved in the contacting and separating directions. > The spot welding grab with a timer of the present invention, such as the above-mentioned energization control means included in item 3 of the patent application scope, further includes a thermometer for detecting the heating temperature of the semiconductor switching element, and cooling according to the detection result of the thermometer. Means for cooling the semiconductor switching element. > The spot welding gun with a timer according to the present invention, such as the scope of patent application No. 4. The timer provided is equipped with a trigger for setting the electric time by the operation of the operator. ^ In the spot welding of the present invention with a timer, as described in item 5 of the scope of patent application, the other part of the main body is completely covered by a covering element. The spot welding gun with a timer of the present invention, such as the scope of patent application No. 6

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Brother (A 467 ^ 87 V. Description of the invention (4) The main body described in (4) is supported on the ring bracket freely and rotatably by at least 3 roller elements provided between the ring bracket. The timer with a timer For spot welding guns, as described in item 7 of the scope of the patent application, the weight of the above-mentioned ring bracket < on the other side is substantially balanced with the weight on the other side. The spot welding of the present invention with a timer, such as applying for a patent The above-mentioned movable terminal electrode holder described in the scope item 8 is supported freely advancing and retreating in the same direction as its extension direction. 的 In the present invention, a spot welding grab with a timer is the same as the above-mentioned automobile described in item g of the patent application scope. The device has a cylinder whose drive axis is in the same direction as the above-mentioned extending direction. '如 肀 Please request the scope of the patent scope No. 0 The above side of the main body surrounds the' Such as the ID scope of the patent application No. 11 of the above ID fixed electrode holder Extending the movable electrode holder described in the spot welding with a timer of the present invention is supported by the fixed support shaft in a freely vibrating manner. Spot welding with a timer in the present invention The above-mentioned cylinder device has a cylinder extending in a direction that intersects the direction. [Embodiment of the Invention] The structure related to the present invention will be described in detail with respect to the so-called C-type spot welding grab. 〇 There are 11 suspensions not shown in the figure. The upper end of the ring-shaped bracket holding arm 14 is connected to the figure in the following description. The embodiment of the spot welding gun with a timer is detailed in conjunction with the drawings. The structure is explained, and then, as shown in FIG. 1 and FIG. 2, the ring bracket 12 on the suspension arm of the C-shaped point Tan grab 1 is connected to the suspension arm 14 as a whole;

Page 8 467787 V. Description of the invention (5) ': --- On a suspension arm not shown, spot welding is suspended as a whole in a free attitude. The annular bracket 12 is formed in a substantially annular shape, and a circular opening 12a in a central portion is formed so as to penetrate the thickness direction. An adapter rail (not shown) is formed on the inner peripheral surface of the opening m, so that a transfer drum, which will be described later, can be rotatably contacted. The main body (/ mounting main body) 16 is attached to the opening 12a of the ring-shaped bracket 12 in a state penetrating through its thickness direction, while being free to rotate around the central axis of the opening 12a. The case where the main body 16 is directly held by the operator will be described in detail later, but in a state in which various components and instruments are installed, the state is generally extended in a horizontal direction, so that the posture is maintained, and the weight balance is set. In other words, also That is, in the state where various components, instruments, etc. are installed, the ring bracket 丨 2 remains substantially vertical, and the ring bracket lj is hung on a suspension arm not shown in the figure by means of a suspension arm 14 The main body 16 here is rotatably supported about a substantially horizontal axis. Furthermore, the main body 16 has an outer peripheral surface portion facing the inner peripheral surface of the opening 12a. The outer peripheral surface portion rotatably supports three transfer rollers 8. In this way, by means of the three transfer rollers 8 and 8, the main body 6 can be rotatably supported with respect to the ring bracket 1 2. Here, as mentioned above, since the main body 6 is in the opening 2a of the ring bracket 2 and the thickness direction of the ring bracket 12 is divided at the ring bracket 12 into a front portion 16a protruding to the front (one side) of the ring bracket 12 And a rear portion 16b protruding to the rear (the other side) of the ring stand 12. 111

C: \ 2D-CODE \ 90-02 \ 89123374.puj Page 9 467 787 V. Description of the invention (6) The front part of the main body 16 described above is fixed to the lower part of the front 63 (left in the figure) The fixed end electrode holder 20, which is substantially L-shaped, is erected from the middle to the upper side in the figure and ends ^ The end of the terminal of the fixed end electrode holder 20 opposite to the ring bracket 12 is installed rearward (in the figure) Right) The first electrode 22 in a protruding state. At the same time, the upper portion of the front portion 16a of the main body 16 supports a substantially linear movable terminal electrode holder 24 that extends in the left-right direction (that is, a direction orthogonal to the ring bracket 12) in the figure. At the same time, you can move in the same direction as the extension direction. The movable electrode holder 24 is provided with a second electrode M at the front end thereof, which extends forward (left in the middle of the center). Further, "in a state where the first electrode 22 and the second electrode 26 are joined to each other", a linear shape is fitted, and in a state where a driving mechanism to be described later is activated, pressure welding is performed with force. | 疋 & On the one hand, the upper part of the rear part of the main body 16 6b is adjacent to the upper part of the ring support 12 2 is installed with the cylinder constituting the above-mentioned drive mechanism 2 'the movable end electrode holder 24 is along with the cylinder 3. The above movable = direction is the horizontal direction in the figure. The electrode holder 22 in the figure is connected to the cylinder 30 by means of the husband's chirping mechanism in the figure.... The piston rod is not shown in the figure at the same time as the 'rear part of the main body 16.', the lower part of the knife ibb adjacent to the 5th shape i lift 1 9 soil π eight, is installed with the main transformer q Kumoto 12 knife connector element The outer voltage of the 40 volt shirt puts the voltage from the energized current between the poles 22 and 26 described later [for two 1% voltage C welding voltage 'for example 0).

467 787

V. Description of the invention (7) At the same time, the right side of the figure is used to set the power-on time. That is, the electric conductor switch for the welding current setting: the rear part 16 of the body 16 is located closer to the cylinder device 28 than i = the timer 34 in the state of the box, and the current value of the welding current between the timer and 26 And the upper part of the figure of i Γ4 '* is equipped with an operator's handle: #Author through the operation_, introduce the trigger 38 installed on the operator, can be detected from the trigger 38 when the timer 3 "indicates the start of welding Initially, the timer 34 allows the two electrodes 22 and 26 to flow at a predetermined current value (for example, 0.3 seconds) in advance, as if controlling half elements described later. Meanwhile, the main body 16 The rear portion 16b is located lower than the steam red device μ in the figure, and is located in a region closer to the right than the main transformer 32 in the figure. The external power supply dust input from the connector element is reduced to Step-down transformer 40 for control voltage (for example, 24V); used to adjust the current value to a set value, for example; CT line 圏 42, 00A; semiconductor switching element 44 'for discontinuous control according to the timer 34 described above Above main transformer 3 2 The welding current generated is finally set to the welding current flowing between the two electrodes 22, 26 丨 Thermostat (thermostat) that detects the temperature of the semiconductor switching element 44 46 · 'for protecting the semiconductor of the semiconductor switching element 44 Switching element protector 48. The above-mentioned semiconductor switching element 44 is a power control element of a high-speed electronic non-contact switch. Specifically, it is composed of an SCR (Silicon Controlled Silicon). Cooling mechanism not shown in detail 'This cooling mechanism is cooled by passing cooling water.

\ 2D-mDE \ 9O-02y8912337 ^ 467787 V. Description of the invention (8) " " " ----------- The measured temperature, the temperature of the semiconductor switching element 4 4 ^ — no longer rises. It becomes a predetermined temperature, that is, from the predetermined temperature, and in addition to covering the moss M β of the timer 34, the rear part 6 of the main body 16 is covered with a covering element 50. This machine is designed to be used as a personal computer, and the rear end face of the cover element 50 is provided again. With the help of a connector element 52 not shown in the figure, it is used to connect the meter and the person. "Outside" water supply into the power supply device, said cooling unit mechanism to provide cooling water to the cooling water input port 5 4 a and the use of cooling, people. ^ ^ ^ ^ 〇〇 1 cold water discharge port 54b; An air discharge port 56b for the compressed air supply to the flywheel device 28 & The input and discharge of the working milk are as described above. In this embodiment, 'in the rear part of the main body] 6b, the energization control mechanism, and the energization control mechanism, and there is only electricity. 22, 2 ^ energized connector element 52, timing coil, ct coil 42, dust-reduction transformer 40, main transformer 32, semiconductor switching element 0, semiconductor switch = protector 48; and as a driving electrode holder for the movable end Drive means of the cylinder device 28. As a result, it has a very easy installation point compared to the case where the main transformer and timer were externally installed and connected through a cable. Here ', the amount of the structure in which the energization control mechanism is incorporated in the device is examined. In this embodiment, under the following conditions, that is, the maximum current is 20,000 amps, the output power is 38 kVA, the pressure of the compressed air introduced in the cylinder device 28 is 5 kgf / cm2, and the two electrodes 22, The crimping force between 26 is 23kgf, and the weight of each component is: Ring bracket 12 .. 2 · 0kg

467787 'Invention description (9) Hanging arm 1 4 ... 3. 3kg body 16 ... 4. 4kg 3 transfer rollers 1 8 ... 0. 2kg fixed end electrode holder 2 0 ... 3. 2kg movable electrode holder 2 4 ... 1. 2kg cylinder device 28 ... 2. 0kg main transformer 32 ... 17.0kg timer 34 1.2kg known as handle 3 6 .., 0.5kg trigger 38. .. 0. 4kg step-down transformer 4 0 ... 1. 2kg CT coil 42 ... 0.2kg semiconductor switching element 44 ... 0.2kg covering element 5 0 ... 3. 0kg others ... about 4 kg Total ... Approximately 4 4kg As a result, the previous weight with 80-90kg with a timer is immediately energized. [The amount of change is about two points. [Inertia Q: 0 can be obtained; the weight and setting of the bracket 1 2 as a support. Bit weight and setting position, 'This spot welding grab 10 suspension: This is one of the comparison of the spot welding grab of the control mechanism loading type. As a result, when the spot welding gun is operated, the operation performance is improved, and it is correctly determined. The position is equivalent, and the front part of the ring = at the suspension point on the suspension arm ... and the position of the women's body in the main body 16 are fixed, and the yuan card is placed in the square part 16b. The swiveling torque is set to the right balance. Knot

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4 6 7 787 V. Description of the invention (10) = On the suspension arm shown in t, it is free to hold without any external force: roughly 2 is in a vertical state, that is, the spot welding grab 10 can easily fall. Continued 2 to 1 extended posture. Therefore, 'operator can greatly improve = welding torch 10'. From this point, operation performance is also required. I :: ϊ is not limited to the above embodiment, and it is obvious that various modifications can be made without departing from the gist of the present invention. Grab: In the example, although the present invention is applicable to c-type spot welding = obstacles to enter the lamp ... However, the present invention is not limited to such use, obviously it can also be applied to X-type spot welding guns. Next, referring to Fig. 3 and Fig. 4, other embodiments related to the present invention will be described with reference to the situation applicable to the x-type spot welding. On the other hand, the same parts as those in the spot welding in the above embodiment are given the same component numbers, and descriptions thereof are omitted. As shown in Figs. 3 and 4, in the spot welding, the towel 10 and the movable electrode ㈣ are rotatably supported by the support shaft 58 of the front portion 16a of the main body 16. To this end, the fixed-end electrode holder 20 is formed in a shape that f-curves from the middle, and the first electrode 22 is mounted on the front end surface (i.e., the lower end surface) of the fixed-end electrode holder 20 in a state of protruding downward. On the one hand, the movable terminal electrode holder 24 is formed in an I-shape, and f-curves upward from the middle, and the second electrode 26 is mounted on the front end surface (ie, the upper end surface) of the movable terminal electrode holder 24 in a protruding state. Moreover, like the above-mentioned type I, in the state where the first electrode 22 and the second electrode 26 are engaged with each other, at the same time, in the X-type embodiment, since it is necessary to maintain a sufficient stroke to and fro

\\ 312 \ 2d-code \ 90-02 \ 89l23374.ptd Page'--467787 V. Description of the invention (11) Drive the second electrode 26 located on the movable end electrode holder 24. The drive axis of the cylinder device is shown in the figure. The state in the up-down direction is mounted on the rear of the main body 6 = min 16b. To this end, the timer 34 is mounted on the rear portion of the main body 16 in the upper part of the figure adjacent to the ring bracket 2. On the one hand, the main transformer 32 is mounted on the rear portion Ub of the main body U near the annular bracket 12 and at the same time, directly below the timer 34. As a result, as in the case of type I, the rear portion 16b of the main body 16 is located in the range where the device 28 and the main transformer 32 are closer to the lower position in the figure, and a step-down transformer 40, a CT coil 42, and a semiconductor Switching element 44, thermostat (thermostat) 4, 6 and semiconductor switching element protector 48. As described above, in the X-type embodiment, the same as the I-type described above, the rear portion 16b of the main body 16 has a power-on control mechanism for controlling between the two electrodes 22, 26. Connector 52, timer 34, CT coil 42, step-down transformer 40, main transformer 仏, semiconductor switching element 44, semiconductor switching element protector 48, etc., as well as driving movable electrode The steam thin device 2 8 of the driving means of the seat is enough to obtain the same function and effect as those of the above type I. [Effects of the Invention] As described in detail above, although a transformer and a timer are installed inside the structure according to the present invention, it can provide a timer with a lighter weight, a small setting inertia, and an improved operation performance. Spot welding grab. At the same time, according to the present invention, it is possible to provide a spot welding grab with a timer that has a good weight balance and does not substantially require an external force to maintain posture. '[Description of component number]

4 6 7 7B7

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\\ 312 \ 2d-codeV9Q-02 \ S9123374.ptd Page 17 467787 Brief description of the drawing Figure 1 is a front view showing an embodiment of the spot welding with a timer according to the present invention applicable to the C type Figure 2 is a right side view showing the structure of the C-type spot welder with a timer shown in Figure 1; Figure 3 shows the spot welder with a timer related to the present invention is applicable to) type A front view of the next embodiment; FIG. 4 is a right side view showing the structure of the spot welding with the timer shown in FIG.

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Claims (1)

467787 VI. Application patent scope 1 _ A spot welding gun with a timer has: ", a circular rod with a circular opening inside the body · the main body 'is located in the opening of the circular support, the thickness direction of the support, And around the central axis of the above opening ::: Rotary installation 'held by the operator; a pair of arms with free fixed end and movable end of the towel axis are provided on one side of the main body; the above-mentioned brackets are installed at the electrodes of the front end of each arm' The movement of the electrode root is pressure-welded to each other with a predetermined pressure; the driving means of the electrode holder for controlling the current of the electrode holder to control the current between the two electrodes is provided on the other side of the main body: the upper d is movable, the above Annular brackets are in the middle of both sides; ^, connected together: Ϊ: ΪThe control means on the two links has: § ten% of the electric catch value connected to the external power supply, the port line to adjust the current flow, From the top: the device, the current from the above connection number element # 于 λ Lt ί the voltage drop between the bad pole. The main device connected to the voltage = two electric current Λ ϊΐ half of the welding current Body switching element. Item 1] Spot welding with timer attached, 1-terminal electrode? With autoclave device for moving the movable = and the electrode on the electrode holder installed in the movable contact and separation direction. Phase 3. If the spot welding with timer is attached to item 1 of the patent application scope, \\ 312 \ 2d-code \ 90-02 \ 89123374.ptd Page 9 9 4 6 7 787 6. In the scope of patent application, the above-mentioned thermometer switch element of the above-mentioned pass 4. If the application, the above-mentioned time trigger 5. As in the application, the above main 6. As in the application, the above main barrel element, since 7. As in the application, the entire weight is essentially 8. As in the application for welding, the direction is free 9. As in the application, the above steam Electrical control of the direction of the cylinder, and root cooling hand patented fan timing device. The other patent model of the patent model is the balanced patent model by the rotating patent model. The above-mentioned forward and backward patent model cylinder device also has the function of detecting the heating temperature of the semiconductor switching element and cooling the semiconductor segment according to the detection result of the thermometer. The spot welding grab with a timer in item 1 is provided with the above-mentioned spot welding grab with a timer, and one side of the spot welding grab with a timer is completely covered by a covering element. The spot welding device with a timer around item 1 and the above-mentioned ring bracket M < w M $, ^ '^ 3 and at least 3 rolls are supported on the ring bracket. The spot welding with the timer around item 1 is to grab and exchange, the ## Α on the side of the ring bracket and the one on the other side. Enclose any one of items 1 to 7 (the point with the timer on the movable end electrode holder is supported along with the thief. The extension direction of the point and the dagger is the same as the point welding gun with the timer on item 8, It has a driving axis along the same extension direction as above and above. 10. For a spot welding gun according to any one of claims 1 to 7, wherein the above-mentioned movable end electrode holder is set around the main bladed timer. The support shaft is supported in a freely vibrating manner. The above-mentioned side 11 _ If the scope of application for patent No. 10 is attached with a deaf and spot welding grab, its 467787 C: \ 2D-GODE \ 90-02 \ 89123374tptd Page 21