JPH02123380U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a sectional view (Fig. 2 - cross section) showing a spot welding device according to an embodiment of the present invention, Fig. 2 is a front view showing the embodiment device, and Fig. 3 is a sectional view showing the main parts of the embodiment device. The figure (FIG. 1-cross section), FIG. 4, and FIG. 5 are side views showing a conventional example. DESCRIPTION OF SYMBOLS 10...Support bracket, 30...Tube side arm, 32...Connection part, 40...Rod side arm, 42...Connection part, 50...Rotation shaft, 61...
First welding part, 62... Second welding part, 70... Air cylinder (fluid pressure cylinder), 71... Piston rod, 73... Cylinder tube, 80... Balance spring, 90... Stopper means, 61
1... Upper electrode (first tube side electrode), 621
...lower electrode (second tube side electrode), 612...
...Upper electrode (first rod side electrode), 622...Lower electrode (second rod side electrode). *No. 2-123381 *Required In the sliding bearing of the piston rod of the pressure cylinder of a spot welding gun, the seal holding plate or plate attached to the open end on the rod side of the cylinder tube is made of an insulating material, and the piston rod of these plates is A bearing structure for a piston rod of a spot welding gun, characterized in that a through hole is provided with a metal scraper for scraping off deposits such as spatter adhering to the surface of the piston rod. *Figure Figure 1 is a sectional view of the main parts showing an example of the sliding bearing structure of a conventional spot welding gun. FIG. 2 is a cross-sectional view of essential parts showing an example of a sliding bearing mulberry according to the present invention. FIG. 3 is a sectional view of a main part showing an example of a presser plate. FIG. 4 is a sectional view of main parts showing another embodiment of the present invention. Explanation of sign removal, 1... Cylinder tube, 3...
...Piston rod, 6...Cylindrical bush, 5,7
... Sealing material, 8 ... Seal pressing plate or plate, 10 ... Metal scraper. *No. 2-123382 *Required A mounting bracket is provided to be attached to a moving means such as a welding robot, an input member is provided on the mounting bracket so as to be movable in a predetermined direction, and a connection between the input member and the mounting bracket is provided. An actuator for moving the input member in a predetermined direction with respect to the mounting bracket is provided between them, a support bracket is rotatably attached to the input member by a rotation shaft, and the support bracket has a rotation shaft. A spot welding device characterized in that a positive side electrode and a negative side electrode are arranged so as to be sandwiched between them and are provided with an insulating material interposed therebetween. *Figure Figure 1 is a side view showing a spot welding device according to an embodiment of the present invention, Figure 2 is a side view showing a conventional one spot welding device, and Figure 3 is a side view showing another conventional spot welding device. It is. 10... Mounting bracket, 20... Pressure arm (input member), 30... Air cylinder (actuator), 40... Equalizing bracket (
support bracket), 41... rotation axis, 50... positive side electrode, 52... negative side electrode, 55...
Insulating material, 56... Insulating material. *No. 2-123383 *Claim A handling jig device that is attached to the tip of an arm of an industrial robot to hold a workpiece, and includes a fixed base fixed to the tip of the arm, and a handle that can move toward and away from the fixed base. a movable base that is arranged to face each other so as to be movable in a direction and to which a workpiece is attached to the side surface opposite to the fixed base; a position defining means that defines a maximum separation position of the movable base from the fixed base; A biasing means that constantly biases the movable base to position it at the maximum separation position, and a motion restriction means that restricts the movement of the robot when the amount of movement of the movable base from the maximum separation position exceeds a predetermined value. A handling jig device characterized by comprising: *Figure Figure 1 is a side view of an industrial robot and spot welding device equipped with the handling jig device of the present invention, and Figure 2 is an enlarged view of the main parts of the handling jig device and spot welding device shown in Figure 1. Figure, 3rd
5 to 5 are state change diagrams, and FIG. 6 is a side view of an industrial robot and a spot welding device equipped with a handling jig device 4 of a conventional structure. DESCRIPTION OF SYMBOLS 1...Robot, 2...Arm, 3...Work head, 4...Handling jig device, 5...Spot welding device, 6...Work, 10...Support bracket, 11...Fixed base, 12... ...Movable base, 13...Guide rod, 16, 17...Spring receiver, 18...Spring, 21...Clamp arm,
31... Micro switch, 41... Base, 43
, 44... Electrode, 45, 46... Arm, 47...
...Stopper, 50...Air cylinder. *No. 2-123384 *Required By measuring the primary current of the welding transformer and correcting the influence of the excitation current from that value and controlling the firing phase of the thyristor on the primary side, the secondary In a control device that controls the current to a constant current, the secondary short-circuit current or welding current corresponding to the primary current is measured in advance, and the value is input and stored in the control device, so that the current is not applied to the welding transformer. Ta1
A constant current control device for a resistance welding machine, characterized in that correlation data between the average value of the next voltage and the excitation current is stored in the control device, and this data is adapted to correct the influence of the excitation current. *Figures Figure 1 is the firing angle and conduction angle of the thyristor as well as voltage and current waveform diagrams, Figure 2 is the configuration diagram of the resistance welding machine used in this invention, and Figure 3 is the primary welding transformer. Figure 4 is a relationship diagram between current and secondary current, Figure 4 is a correlation data diagram between the average value of the primary voltage applied to the welding transformer used in this invention and excitation current, and Figure 5 is an example of this invention. FIG. 1...Resistance welding machine, 4...Welding transformer, 7...
Control device, 8...Current transformer, 9...Control circuit, 10
...thyristor. *No. 2-123385 *Request (1) Voltage detection means for detecting the voltage applied between welding electrodes that sandwich the welding material; and current detection means for detecting the welding current flowing to the welding material via the welding electrodes. means, resistance value calculation means for calculating the resistance value between the electrodes based on the voltage value and current value obtained from the voltage detection means and the current detection means, respectively; 1. A resistance welding control or measuring device comprising: splash detection means for determining the presence or absence of splash generation based on temporal changes. (2) The resistance welding control or measuring device according to claim 1, further comprising means for calculating the resistance value between the welding electrodes or determining whether or not splash occurs in a predetermined section of the current application time of resistance welding. (3) The resistance welding control or measuring device according to claim 1, further comprising means for correcting the current setting value for the next welding according to the determination result obtained by the splash detection means. *Figure Figure 1 is a block diagram showing the overall circuit configuration of an example in which the present invention is applied to an inverter-type resistance welding machine. Figure 2 shows the time of the resistance value between welding electrodes during the current application time of resistance welding. FIG. 3 is a diagram illustrating the effect of splash detection according to the embodiment. In the drawings, 22a, 22b... welding electrodes,
24a, 24b...Workpiece, 26...Current sensor (toroidal coil), 28...Waveform restoration circuit, 30...Current average value calculation circuit, 32...Current comparison circuit, 34...Current setting circuit, 42 ... Voltage average value calculation circuit, 44, 46 ... A/D converter, 4
8...CPU, 50...ROM, 52...RAM
, 54...Display device, 56...I/O.

Claims (1)

[Claims for Utility Model Registration] A tube-side arm and a rod-side arm are rotatably supported on a support bracket about a rotation shaft, a cylinder tube of a fluid pressure cylinder is connected to a connecting portion of the tube-side arm, and the above-mentioned A piston rod of a fluid pressure cylinder is connected to the connecting portion of the rod side arm, and a first tube side electrode and a second tube side electrode provided on the tube side arm and a first rod side electrode and a second tube side electrode provided on the rod side arm are connected. A first welding portion and a second welding portion are provided such that they face each other so as to be in contact with the two rod side electrodes, and both the first and second welding portions are connected to the first welding portion with respect to the rotation axis. is provided on one side, and a second weld is provided on the other side, the hydraulic cylinder is supported movably in the stroke direction with respect to the support bracket, and between the hydraulic cylinder and the support bracket is interposed with a spring that biases the hydraulic cylinder in position relative to the support bracket;
1. A spot welding device comprising stopper means for restricting movement of the piston rod or cylinder tube relative to the support bracket at a predetermined position to fix the fluid pressure cylinder to the support bracket.