JP4630740B2 - Capacitor discharge type stud welding gun and portable capacitor discharge type stud welding machine equipped with the same - Google Patents

Description

  The present invention relates to a capacitor discharge type stud welding gun for use in a portable capacitor discharge type stud welding machine, which carries out the implantation of studs, washers and the like by charge / discharge welding, and a portable capacitor discharge type stud welding provided with the same. Related to the machine.

  Conventionally, a capacitor discharge type stud welding gun used for a portable capacitor discharge type stud welding machine has a structure in which a stud attached to a tip portion (for example, a tip chuck) of the welding gun is pressed against a metal plate as a welded portion with a constant pressure. Have. The pressing at a constant pressure can be adjusted by turning a pressure adjustment spring built in the welding gun and turning an adjustment knob provided outside.

  Further, the tip of the stud is usually provided with a projection for promoting welding during discharge. The diameter of the protrusion is very small compared to the width dimension (diameter) of the stud, and is welded to the surface of the metal plate by pressing with a welding gun and discharging with a capacitor.

  However, if the pressing pressure is too large, the protrusion is deformed, the diameter is increased, the current density per unit area is lowered, and appropriate welding cannot be performed. For this reason, the user needs to make several trial hits in order to set an appropriate spring pressure condition.

  Performing the trial hit every time the stud material or size is changed is a heavy work burden. In particular, in the case of a relatively soft material such as an aluminum material, the protrusion has a large diameter and is likely to be deformed. Therefore, an appropriate spring pressure setting operation has been a greater burden.

  Also, in corrugated wire welding of iron, which is often used in automobile sheet metal repairs, the pressure adjustment spring must be set harder than in the case of aluminum. For this reason, the user must re-adjust the adjustment knob by moving it to match the stud material of aluminum or iron each time, and reproduce the appropriate spring pressure to ensure stable welding quality. It was very time consuming.

  For reducing the labor, the conductive material made of a conductive material and arranged to be movable up and down, the mounting jig provided at the tip of the conductive material to hold the stud material to be welded, and these In a stud welding gun having a holder for holding the stud, a linear motor capable of controlling the vertical movement distance of the energizing material is used as the driving means (see, for example, Patent Document 1). Is known.

  As another example, a cylindrical main body having a chuck for receiving a stud to be welded to the tip of the housing slidably along the axial direction in the housing, and the cylindrical main body always facing the tip direction. And a connecting energization member for continuing a welding cable from a welding capacitor of a welding power source device for flowing a welding current between a stud to be welded and a base material. In a capacitor discharge type stud welding gun in which a welding current is passed between the base material and the stud via the stud and the stud is pressed against the base material to be welded, an adjustment member capable of adjusting the pressure applied to the stud by the spring; A scale member attached to the rear end of the cylindrical carrier, and the adjustment member is adjusted to the scale of the scale member to adjust to the stud. Capacitor discharge stud welding gun (e.g., see Patent Document 2.), Characterized in that to be able to set the pressure to a desired value are known.

JP 2002-172465 A JP 61-111782 A

  Since the invention according to Patent Document 1 causes an increase in weight and an increase in size due to the provision of the linear motor, the burden on the operator is large when handling the capacitor discharge type stud welding gun. . In addition, there is a drawback that the structure is complicated and the cost of parts is increased.

  By providing the scale member, the invention according to Patent Document 2 has a certain degree of reproducibility of the predetermined spring pressure. In addition, in Patent Document 2, page 2 lower right column to page 3 upper left column, “the scale can be provided corresponding to each pressurization value predetermined according to the spring to be used” is described. It can be considered that adjustment is easy.

  However, for example, when an attempt is made to switch between an aluminum stud and an iron stud, the pressure values differ greatly, and the adjustment member must be moved greatly each time. Since the invention according to Patent Document 2 adjusts the position of the stud receiving pin of the stud position adjusting member by rotating the knob on the rear end side, switching between the aluminum stud and the iron stud is performed. Each time, it was necessary to repeatedly rotate the knob for a long time, which was very troublesome.

  In addition, capacitor discharge type stud welding is performed in a very short time of about 0.001 to 0.003 seconds, and does not leave a welding mark on the back surface of the base material (sheet metal) to which the stud is attached. Although there are advantages compared with other stud welding methods, there is a disadvantage that the nugget portion is thin in order to control the applied pressure, and the joint strength is slightly weaker than other stud welding methods.

  In addition to this, especially when specially shaped metal pieces such as iron corrugated wires are welded to the sheet metal (base metal) by capacitor discharge type stud welding, the corrugated valleys that continue at regular intervals are continued. By welding using the corrugated wire bit, the current for welding is shunted to the previously welded portion. This tendency is particularly remarkable when the pressing force of the corrugated wire bit is weak. For this reason, when the pressing force is weak, a sufficient welding current cannot be secured. In addition, with a weak pressing force, contact failure occurs on the surface of the sheet metal, and there may be a problem that the front and back surfaces of the sheet metal are burned.

  The present invention has been made in view of the above circumstances, is light and easy to handle, can be provided at low cost, can be adjusted accurately and easily with respect to the size and type of the stud, and can be reliably fused. SUMMARY OF THE INVENTION An object of the present invention is to provide a capacitor discharge type stud welding gun in which the front and back surfaces of a sheet metal are not burned.

A cylinder, a gripping part connected to a side of the cylinder, an electrode slide rod, and a welding switch; the cylinder includes a stud holding part for holding the stud; and a spring for adjusting pressure applied to the stud; A spring pressure adjustment knob for adjusting the amount of spring pressurization , and a spring pressure switching lever interlocking with the electrode slide rod and having a plurality of switching positions corresponding to the stud material. Capacitor discharge type stud welding gun is a capacitor discharge type stud welding gun that is configured to change the spring pressure of the electrode slide rod step by step according to the lever switching position. The capacitor discharge type stud welding gun is welded by pushing the stud and manually operating the welding switch. It has a manual circuit that can be welded and an automatic circuit that can be welded by pushing the stud. The capacitor discharge stud welding gun, characterized in that it comprises a selector switch that allows, it is an Means for Solving the Problems.

  According to the present invention, a cylinder, a grip portion connected to a side portion of the cylinder, an electrode slide rod, and a welding switch are provided. The cylinder includes a stud holding portion that holds a stud, and pressurization adjustment to the stud. In a capacitor discharge type stud welding gun used in a portable capacitor discharge type stud welding machine provided with a spring for performing and a spring pressure adjustment knob for adjusting the amount of spring pressure, in conjunction with the electrode slide rod, and Since the spring pressure switching lever having a plurality of switching positions corresponding to the stud material is provided, and the spring pressure amount of the electrode slide rod is switched stepwise by the switching position of the spring pressure switching lever, the stud to be used When changing the material of the stud, simply move the spring pressure switch lever with your finger, Can be a integer region, it can greatly improve the workability.

In addition, the capacitor discharge type stud welding gun has a manual circuit that can be welded by pushing the stud and manually operating the welding switch, and an automatic circuit that can be welded by pushing the stud, and the manual circuit and automatic circuit can be switched. The spring pressure switch lever is set at the center fixed position and the position according to the material. When using an automatic circuit, the first welding switch is selected with the switch and only the stud is pushed in. Can efficiently perform the welding work.

  Also, when using a manual circuit, set the spring pressure switching lever to the center fixed position, select the second welding switch with the switching switch, and push the stud and manually operate the second welding switch to perform reliable stud implantation. Can do.

  More specifically, when the spring pressure switching lever is set at the center fixed position, unlike the case where the spring pressure switching lever is set when iron or aluminum is selected, the buffering action of the spring can be cut off. As a result, the force that the operator grips and presses the welding gun is directly transmitted to the base material, and sufficient pressing force can be secured for welding. In other words, even when welding something that is not suitable for capacitor discharge type stud welding such as iron corrugated wire, the buffering effect of the spring can be invalidated by selecting manually (second welding switch) Therefore, it is possible to press strongly against a corrugated wire or the like, and a current can be sufficiently supplied to a target welding portion. Further, it is possible to prevent burning of the front and back surfaces of the sheet metal resulting from poor contact, and to perform the blasting reliably and with good appearance.

In addition to the structure of the invention according to claim 2 , that is, the structure of claim 1 above, it is adapted to the stud to be used more quickly by providing a scale for displaying the amount of movement of the spring end which is a known structure. Spring pressure can be realized.

As disclosed in claim 3 , by providing the capacitor discharge stud welding gun according to claim 1 or 2 in a capacitor discharge stud welding machine, the welding gun can be made light in weight and portable. The capacitor discharge type stud welding machine itself can be easily handled with one hand, and the mobility can be improved. Further, by reducing the manufacturing cost of the welding gun itself, the capacitor discharge stud welding machine itself can be made inexpensive. Furthermore, it is possible to provide a portable capacitor discharge type stud welding machine provided with various excellent effects of the welding gun described in the first to third aspects.

In the capacitor discharge type stud welding machine according to claim 4 , that is, the capacitor discharge type stud welding machine according to claim 3 , the weight of the capacitor discharge type stud welding gun is increased by providing the welding machine main body with output adjusting means during welding. In addition, it is possible to perform the welding operation more easily in a state optimal for the material and size of the stud to be used.

Further, when the capacitor discharge type stud welding gun according to claim 1 or 2 is used, when the stud is manually welded with the spring pressure switching lever as a central locking position, the pressing force by the spring is controlled. Since it is not performed, a more suitable stud fusion can be realized by using the output adjustment knob of the welding machine main body.

  The present invention includes a cylinder, a gripping portion connected to a side portion of the cylinder, and a welding switch, and the cylinder includes a stud holding portion that holds a stud, a spring for performing pressure adjustment on the stud, and a spring. Capacitor discharge type stud welding gun equipped with pressure adjusting operation means, the capacitor discharge type stud welding gun can be welded by a manual circuit that can be welded by pushing the stud and manually operating the welding switch, and by welding the stud. The pressure adjusting operation means includes a spring pressure switching lever corresponding to the stud material, and the spring pressure switching lever is a part of the welding energization circuit and switches between the manual circuit and the automatic circuit. To change the stud material and size by making the capacitor discharge type stud welding gun possible, spring pressure cutting By switching the lever, it can be moved to the pressure adjustment position suitable for the material of the stud very easily, only the size change can be done using the spring pressure adjustment knob, and further by switching manually and automatically, Capacitor discharge type stud welding gun that can be used according to work conditions, is light and easy to handle, can be provided at low cost, and can be adjusted accurately and easily for stud size and type has been realized.

  FIG. 1 is a right side view of a capacitor discharge type stud welding gun according to an embodiment of the present invention, and FIG. 2 is a partial longitudinal sectional view showing an internal structure of the capacitor discharge type stud welding gun according to the embodiment and a partially enlarged view thereof. FIGS. 3 and 3 are front explanatory views showing relative positions of a spring pressure switching lever and a capacitor discharge stud welding gun of the capacitor discharge stud welding gun according to the embodiment, and FIG. 4 is a capacitor discharge stud according to the embodiment. FIG. 5 is a circuit diagram of a portable capacitor discharge type stud welding machine provided with a capacitor discharge type stud welding gun according to the embodiment, and FIG. 6 is a washer instead of a stud bolt. 7 is a perspective view showing an iron washer and a bit for an iron washer used when the wire is welded, FIG. 7 is a perspective view showing a bit used for the welding of the corrugated wire, and FIG. 8 is a wave type wire. FIG. 9 is a portable capacitor discharge type stud welding machine according to an embodiment of the present invention, and is an explanatory view showing the front of the welder body, and FIG. 10 is a portable capacitor discharge according to the embodiment. It is a type | mold stud welding machine, and is explanatory drawing which shows the side surface of a welding machine main body.

  In the present invention, “automatic” refers to a state in which the changeover switch 17 selects the first welding switch 15, that is, a state in which welding is possible simply by pressing the welding gun against the base material 2. . In the present invention, “manual” means that the changeover switch 17 selects the second welding switch 16, that is, in addition to pressing the welding gun against the base material 2, the second welding switch 16. A state where welding is possible by performing an operation of pressing.

  The capacitor discharge stud welding gun 1 according to the embodiment of the present invention is used in a state of being attached to the portable capacitor discharge stud welding machine 4 shown in FIGS.

  As shown in FIGS. 1 and 2, a capacitor discharge stud welding gun 1 according to an embodiment of the present invention includes a welding gun main body including a cylinder 10 and a grip portion 11 integrally formed on a lower side surface of the cylinder 10. The stud holding part 13 attached to the tip of the electrode slide rod 100 protruding from the cylinder 10 of the welding gun main body is provided. In this embodiment, the welding gun body is formed by abutting a right side member and a left side member of the welding gun body made of synthetic resin, which are divided into right and left parts.

  An electrode slide rod 100 is disposed in the cylinder 10 in a state in which the electrode slide rod 100 can slide in the longitudinal direction in the longitudinal direction of the center of the shaft. The distal end side of the electrode slide rod 100 protrudes from the cylinder 10, and the stud holding portion 13 is provided at the distal end portion of the electrode slide rod 100 as described above.

  As shown in FIGS. 2 and 3, the spring pressure switching lever 14 has a shape in which a block member 144 is provided on a part of the back surface 143 of the disc-shaped rotating plate 141, and the lever portion 140 is erected from the peripheral surface 145. is there. The electrode slide rod 100 passes through a hole 142 formed at the center of the rotating plate 141, and is in contact with the step portion 101 of the electrode slide rod 100 and the front surface of the rotating plate 141 of the spring pressure switching lever 14.

  A lever portion restricting opening 146 is formed at a position corresponding to the arrangement of the lever portion 140 in the upper portion of the cylinder 10. The lever portion 140 protrudes from the lever portion restriction opening 146. The lever part 140 can be rotated from the vertical state to the left and right by about 37 °. The amount by which the electrode slide rod 100 connected to the spring pressure switching lever 14 can be pushed differs depending on the block material 144 provided on a part of the rotating plate 141 and the rotation of the spring pressure switching lever 14.

  As shown in FIG. 4, the lever portion restricting opening 146 forms a first opening 147 that is opened as a long hole in the left-right direction, and is a long hole from the left and right ends of the first opening 147 toward the rear of the cylinder 10. The second opening 148 is formed continuously. In addition, a lever locking portion 149 is provided by slightly extending the opening toward the front of the cylinder 10 from the central portion and the left and right ends of the first opening portion 147.

  In this embodiment, the pressing force is suitable for the use of a steel stud, washer or the like in a state where the lever portion 140 is tilted to the right. Further, the pressing force suitable for the aluminum stud 3 or the like is obtained in the state where the lever portion 140 is tilted to the left. Furthermore, the lever portion 140 is locked at the center position (that is, the electrode slide rod 100 does not slide backward even when the electrode slide rod 100 is pressed against the base material 2). This is because the second opening portion 148 is not formed at the center position, so that the lever portion 140 cannot slide backward and the electrode slide rod 100 connected to the lever portion 140 cannot slide backward.

  In this embodiment, in order to facilitate the relationship between the position of the lever part 140 and the electrode slide rod 100, the position A (left end position) for aluminum material is “weak” and the position B for iron material (right end position). ) Is marked as “strong” and in the center as “fixed”.

  A push rod 103 having rebound resilience and conductivity by a coil spring is provided behind the spring pressure switching lever 14 in the cylinder 10. The push rod 103 is held by a push rod holder 104. Further, the push rod holding body 104 is provided integrally with the cylinder 10. The push rod 103 is further used to push a first welding switch 15 described later located behind the push rod 103.

  A first welding switch 15 (leaf switch) is disposed behind the push rod 103. The first welding switch 15 is energized with the protruding first switch lever 150 pressed.

  A second welding switch 16 (limit switch) is provided near the front base in the grip portion 11. The second switch lever 160 for energizing the second welding switch 16 protrudes from the gripping portion 11 to the outside, so that the operator holds the gripping portion 11 with one hand and pulls the trigger. It arrange | positions so that the lever 160 can be pushed.

  The first welding switch 15 and the second welding switch 16 described above are selectively used during welding. As means for performing this selection (switching), a changeover switch 17 is provided at the upper part of the cylinder 10 as shown in FIG. The first welding switch 15 and the second welding switch 16 are switched by switching the switch lever 170 of the changeover switch 17 to the left and right. The switching of these switches is shown as a circuit of the capacitor discharge stud welding gun 1 in the discharge circuit of the circuit diagram of the portable capacitor discharge stud welding machine 4 of FIG.

  In the vicinity of the rear end of the electrode slide rod 100, a rod-side spring receiving portion 105 is provided. A spring pressure adjustment knob 12 is disposed at the rearmost end of the cylinder 10 on the center axis of the electrode slide rod 100. The spring pressure adjusting knob 12 includes a knob-side spring receiving portion 106 via a male screw shaft 120 on the front side. The male screw shaft 120 is screwed into a female screw hole 122 formed at the center of the rear wall 121 that closes the rear end of the cylinder 10. A spring 18 is interposed between the rod side spring receiving portion 105 and the knob side spring receiving portion 106.

  The electrode slide rod 100 is urged forward by the rebound resilience of the spring 18. With this configuration, when the spring pressure adjustment knob 12 is tightened, the spring 18 is pressed, and the electrode slide rod 100 is more strongly biased forward.

  The capacitor discharge type stud welding gun 1 according to the present embodiment constitutes a portable capacitor discharge type stud welding machine 4 shown as an example in FIG. The capacitor discharge type stud welding gun 1 and the welding machine main body 40 are connected by a cable 6. The cable 6 in the capacitor discharge type stud welding gun 1 in the embodiment has a configuration in which the cable 6 is led out from a cable opening 110 formed in the lower part of the gripping part 11 and connected to the front side of the welding machine main body 40.

  Of the portable capacitor discharge type stud welding machine 4 using the capacitor discharge type stud welding gun 1 according to the present embodiment, the welding machine body 40 will be described in particular. The portable capacitor discharge type stud welding machine 4 is merely an example, and the present invention is not limited to the following examples.

  As shown in FIGS. 9 and 10, a welding machine body 40 in the portable capacitor discharge type stud welding machine 4 according to the embodiment includes a caster 49 at the bottom, a handle 47 at the back, and a power supply cable 48, and a power supply at the front. There are provided a switch 43, a charge notification lamp 41 that is lit when charging, a discharge notification lamp 42 that is lit when discharging, and an output adjustment knob 44 corresponding to each material (aluminum, iron). As the output adjustment knob 44 rotates, the output value changes stepwise. Around the output adjustment knob 44, there are provided an aluminum material adjustment range display unit 45 and an iron material adjustment range display unit 46 which show an adjustment range of an appropriate output value between the aluminum material and the iron material step by step.

  As described above, the capacitor discharge type stud welding gun 1 according to the present embodiment uses the spring pressure switching lever 14, the spring pressure adjusting knob 12, and the changeover switch 17 so that it can be easily adapted to the type and size of the stud 3 at hand. However, by providing an adjustment function in the welding machine main body 40, the ease of adjustment is further increased, and the weight of the capacitor discharge type stud welding gun 1 itself is improved. It will not lead to an increase of.

  When the capacitor discharge stud welding gun 1 according to this embodiment is used, when the stud 3 is manually welded with the spring pressure switching lever 14 at the center lock position C, the pressing force by the spring 18 is used. Therefore, by using the output adjustment knob 44 of the welding machine main body 40, it is possible to realize a more suitable stud fusion.

  In the welding machine main body 40 in this embodiment, since the capacitor discharge type stud welding gun 1 is very lightweight, means for suspending the welding gun (arm, etc.) and means for supporting (welding gun holder, etc.) It does not have. However, means for suspending or supporting a welding gun in a normally portable welding machine can be provided as required. Further, for example, a hook or the like necessary for the arm can be provided in the capacitor discharge type stud welding gun 1.

  Regarding the capacitor discharge type stud welding gun 1 according to the embodiment of the present invention having the above-described configuration, operations and operations during welding will be described.

  First, the state at the time of welding is demonstrated about the case where the stud 3 of an aluminum material is used. An aluminum stud 3 is attached to the tip of the electrode slide rod 100. The spring pressure switching lever 14 is set to the left end, that is, the position A for the aluminum material. The changeover switch 17 selects the first welding switch 15.

  When the capacitor discharge type stud welding gun 1 is pressed against the base material 2 in this state, the stud 3, the electrode slide rod 100, and the spring pressure switching lever 14 move backward together, and the spring pressure switching lever 14 The block material 144 formed on the rotating plate 141 pushes the push rod 103, and the push rod 103 pushes the first welding switch 15. When the push rod 103 presses the first welding switch 15, the energized state is established and welding by discharge can be performed.

  Next, the state at the time of welding is demonstrated about the case where the stud 3 of an iron material is used. An iron material stud 3 is attached to the tip of the electrode slide rod 100. The spring pressure switching lever 14 is set to the right end, that is, the position B for iron material. The changeover switch 17 selects the first welding switch 15.

  When the capacitor discharge type stud welding gun 1 is pressed against the base material 2 in this state, the stud 3, the electrode slide rod 100, and the spring pressure switching lever 14 move together as in the case of the aluminum material. To do. Here, when the iron stud 3 is used, the rotating plate 141 of the spring pressure switching lever 14 directly pushes the push rod 103 (the portion without the block member 144), and the push rod 103 further pushes the first welding switch 15. Press.

  When the push rod 103 presses the first welding switch 15, the energized state is established and welding by discharge can be performed. When the part without the block material 144 of the rotating plate 141 pushes the push rod 103, the amount of movement of the electrode slide rod 100 becomes larger than in the case of setting the aluminum material, and the spring 18 is further compressed. For this reason, the rebound resilience of the spring 18 is increased, and the stud 3 can be pressed more strongly against the base material 2.

  When the iron washer 5 is to be fused instead of the iron stud 3, an iron washer bit 50 as shown in FIG. 6 is attached to the tip of the electrode slide rod 100, and the iron washer bit 50 is used. It can be carried out by holding the iron washer 5.

In the above automatic welding, a finer pressing force can be set by adjusting the spring pressure adjusting knob 12. Moreover, the scale for showing the adjustment amount disclosed by a prior art can also be provided.
In the present invention, the spring pressure adjusting knob 12 and the scale, which are known techniques, can be applied after the adjustment position is instantaneously determined for the stud 3 made of a different material by the spring pressure switching lever 14 described above. The spring pressure adjustment knob 12 does not need to be moved greatly, and a partial scale is sufficient. With this configuration, the capacitor discharge type stud welding gun 1 is light in weight without causing an increase in weight due to the provision of a motor or the like, and the operability is dramatically improved.

  A state where a stud having a special shape such as a corrugated wire 8 is welded to the base material 2 will be described. First, the corrugated wire bit 7 (see FIG. 7) is attached to the tip of the electrode slide rod 100. The spring pressure switching lever 14 is set to the center lock position C (that is, the state where the elasticity of the spring 18 does not act). The changeover switch 17 selects the second welding switch 16.

  In this state, as shown in FIG. 8, if the capacitor discharge stud welding gun 1 is pressed against the base metal (sheet metal) 2, the spring pressure switching lever 14 cannot move backward, so that the spring pressure The electrode slide rod 100 connected to the switching lever 14 is also unable to move backward. Here, by pressing the second welding switch 16, the welding portion 80 is energized, and welding can be performed with a stronger pressing force than during automatic welding. As a result, it is possible to reduce the shunt current of the welding current to the surface, to secure a sufficient welding current, and to prevent the occurrence of seizure on the front and back surfaces of the sheet metal resulting from poor contact.

  As manual welding other than the above-described method, the spring pressure switching lever 14 can be set to one of the left and right ends, and the switching switch 17 can be used as the second welding switch 16. By moving the spring pressure switching lever 14 to the left and right positions A and B, the amount of movement of the electrode slide rod 100 is the same as that during automatic welding, and it is possible to perform welding manually in consideration of the welding timing. It is convenient and can improve workability.

  As described above, since the capacitor discharge stud welding gun 1 according to the present invention includes the spring pressure switching lever 14, there is no need to repeatedly rotate the spring pressure adjustment knob 12 for a long time, Setting according to the size can be performed very easily. Further, when the changeover switch 17 is provided, the electrode slide rod 100 is locked to invalidate the buffering effect of the spring 18, exhibit a sufficient pressing force against the base material 2, and implant the stud 3. Can do. In addition, it is very inexpensive because it uses a simple configuration without using a motor and does not cause an increase in weight due to a configuration that switches between effective and ineffective springs, and has excellent workability and does not require effective parts. Can be provided.

It is a right view of the capacitor discharge type stud welding gun which concerns on the Example of this invention. FIG. 2 is a partial longitudinal sectional view showing an internal structure of a capacitor discharge type stud welding gun according to an embodiment of the present invention and a partially enlarged view thereof. It is front explanatory drawing which shows the relative position of the spring pressure switching lever of the capacitor discharge type stud welding gun which concerns on the Example of this invention, and a capacitor discharge type stud welding gun. It is the top view which a part of the front end side of the capacitor discharge type stud welding gun concerning the example of the present invention omitted. 1 is a circuit diagram of a portable capacitor discharge type stud welding machine including a capacitor discharge type stud welding gun according to an embodiment of the present invention. In this invention, it is a perspective view which shows the iron washer and the bit for an iron washer used when melt-washing a washer. In this invention, it is a perspective view which shows the bit used for the vegetation of a corrugated wire. It is explanatory drawing which shows the vegetation state of a corrugated wire. It is a portable capacitor | condenser discharge type stud welding machine which concerns on the Example of this invention, Comprising: It is explanatory drawing which shows the front of a welding machine main body. It is a portable capacitor discharge type stud welding machine concerning the example of the present invention, and is an explanatory view showing the side of a welding machine main part.

DESCRIPTION OF SYMBOLS 1 Capacitor discharge type stud welding gun 10 Cylinder 100 Electrode slide rod 101 Step part 103 Push rod 104 Push rod holding body 105 Rod side spring receiving part 106 Knob side spring receiving part 11 Holding part 110 Cable opening part 12 Spring pressure adjustment knob 120 Male screw shaft 121 Rear wall 122 Female screw hole 13 Stud holding portion 14 Spring pressure switching lever 140 Lever portion 141 Rotating plate 142 Hole portion 143 Back surface 144 Block material 145 Peripheral surface 146 Lever portion restriction opening portion 147 First opening portion 148 First Two opening portions 149 Lever locking portion 15 First welding switch 150 First switch lever 16 Second welding switch 160 Second switch lever 17 Changeover switch 170 Switch lever 18 Spring 2 Base material 3 Stud 4 Portable controller Sensor discharge type stud welding machine 40 Welding machine body 41 Charge notification lamp 42 Discharge notification lamp 43 Power switch 44 Output adjustment knob 45 Aluminum material adjustment range display section 46 Iron material adjustment range display section 47 Handle 48 Power supply cable 49 Casters 5 Washers 50 Iron Bit for washer 6 Cable 7 Bit for corrugated wire 8 Corrugated wire 80 Welded part 81 Welded part A (for aluminum material) position B (for iron material) position C Lock position

Claims (4)

A cylinder, a gripping part connected to a side of the cylinder, an electrode slide rod, and a welding switch; the cylinder includes a stud holding part for holding the stud; and a spring for adjusting pressure applied to the stud; A spring pressure adjusting knob for adjusting the amount of spring pressure , and a spring pressure switching lever that is linked to the electrode slide rod and has a plurality of switching positions corresponding to the stud material. In the capacitor discharge type stud welding gun configured to switch the spring pressure of the electrode slide rod step by step according to the lever switching position,
The capacitor discharge type stud welding gun has a manual circuit that can be welded by pushing the stud and manually operating the welding switch, and an automatic circuit that can be welded by pushing the stud.
A capacitor discharge type stud welding gun provided with a changeover switch that enables switching between a manual circuit and an automatic circuit. 2. A capacitor discharge type stud welding gun according to claim 1 , further comprising a scale for displaying the amount of movement of the spring end by the operation of the spring pressure adjustment knob. A portable capacitor discharge type stud welding machine comprising the capacitor discharge type stud welding gun according to claim 1 . 4. The portable capacitor discharge type stud welding machine according to claim 3 , wherein the welding machine main body of the capacitor discharge type stud welding machine is provided with an output adjusting means during welding.

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