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7956308 |
Weld gun control system
A system and method for controlling a piston-cylinder assembly of a welding apparatus, the piston-cylinder assembly including a plurality of pressure chambers, wherein the piston-cylinder assembly...
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7718916 |
Low impact spot welding cylinder using dual pistons
A weld cylinder having a dual piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a...
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7714247 |
Low impact spot welding cylinder using single piston
A weld cylinder having a single piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a...
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7301118 |
Welding gun with controller and method for using same
A welding gun assembly including a housing that defines a first chamber and a second chamber. The assembly also includes a first piston moveably disposed in the first chamber and a second piston...
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7291801 |
Electrode for projection welding
In an electrode for projection welding, an end cover (10) of metal having a through hole (19) is attached to the end of a main body (6) of metal having a cylindrical shape, a guide sleeve (12) of...
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7214902 |
Low impact spot welding cylinder with dual pistons
The present invention provides a weld cylinder having a dual piston arrangement. The cylinder has a middle separator separating the cylinder into two cavities. A retract piston assembly is arranged...
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7067760 |
Welding gun
Spot welding gun, having a support, a lower half-gun and an upper half-gun articulated one to the other by a pin, mounted in an oscillating configuration with respect to said support and propping...
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6927357 |
Weld gun equalizer
A weld gun having a linkage, which relates pivotal motion of a pair of laterally opposed facing electrodes of the weld gun in a predetermined manner. Based upon the predetermined motion of the...
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6633015 |
Soft-touch pneumatic drive unit
A soft-touch pneumatic drive unit for welding is provided. The drive unit includes a first section, a second section, and a third section. A piston rod extends substantially throughout these...
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6624378 |
Resistance welding
A method and apparatus for resistance welding of objects (39) by a spot welding gun which has a C-shaped arm (9), a front electrode (11), a back electrode (13) and a pneumatic cylinder (21). The...
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6294750 |
Method and apparatus for automatically adjusting air pressure in a pneumatic weld head
A pressure regulator system for a pneumatically- or hydraulically-actuated weld head. The weld head includes a switching valve comprising several ports: an inflow port attached to a source of...
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6268581 |
Seam welding machine
A plurality of pistons are disposed in series in a circular electrode pressure cylinder and each of the pistons is separated. During low pressure output only one piston is used so that the friction...
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6198065 |
Resistance welding process and device
A resistance welding process in which the welding electrodes are moved at least via a wording piston-cylinder unit, wherein before the start of the welding process, the welding electrode is in a...
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5958262 |
Equalizing mechanism for robotically carried spot weld guns
A spot welding apparatus having a welding gun with movable and fixed electrodes carried on an articulating wrist, the apparatus comprising: a) a robotically actuated articulating wrist carrying the...
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5948284 |
Equalizing cam rocker fixture assembly for a resistance welding gun
An apparatus for contacting and applying a force to opposite sides of a workpiece, such as a resistance welding device adapted for use on an automated assembly line. The apparatus is configured to...
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5895584 |
Movable electrode structure of resistance welding apparatus for nut
A guide pin of a movable electrode is inserted into a hole of a nut fed to an intermediate position between a fixed electrode and the movable electrode, and the movable electrode is then moved down...
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5831234 |
Spot welding machine
In opposition to a lower electrode (31) fixed to a frame (3), an upper electrode (29) is carried by an upper pressing base (23), which is engaged with a vertical guide rail (25) and joined by a...
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5789719 |
Method and apparatus for electrical resistance spot welding
An improved welding apparatus and method of use including a pair of opposed electrodes mounted on arms which are fixed against outward displacement during the application of the welding current....
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5750952 |
Welding gun with anti-rotation cylinder and internal proximity switch
A welding gun that prevents rotation of the electrode, including a cylinder and a reciprocating piston assembly having a pair of pistons. In addition to the conventional connecting rod, the pistons...
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5731563 |
Copper core weld gun
A copper core weld gun assembly is provided with a substantially omega (Ω) shaped cross-section taken through each arm of the assembly. Concentric copper tubes are provided to carry cooling water ...
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5705782 |
Internal coil spot welding device
A spot welding device to secure the inner end of a coil of steel to itself to prevent uncoiling. The welding device is carried on an articulated support arm assembly that allows for positioning the...
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5632911 |
Apparatus for aiding in the manipulation of a tool
Apparatus for aiding in the manipulation of a tool by supporting the weight thereof is designed particularly for a resistance welding tool. The apparatus includes an overhead support, a curved bar...
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5545872 |
Pressure controller and pressure control method for resistance welder
An improved tip dressing process is provided wherein the pressure between the electrode tip of a resistance welder and the cutter of a tip dresser is varied during the tip dressing process. A...
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5525774 |
Method and apparatus for fusing lead wires of coils to terminals
A fusing electrode is mounted on a vertically movable carriage which is raised by a first air actuator and lowered by gravity into engagement with a commutator tang. During a fusing cycle,...
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5504297 |
Apparatus for electrical resistance spot welding
An improved welding apparatus and method of use including a pair of opposed electrodes mounted on arms which are fixed against outward displacement during the application of the welding current....
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5484986 |
Weld force limiter
A weld force limiting apparatus for use in bench and press type welding units which is capable of advancing a first electrode into contact with production pieces to be welded together. The weld...
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5412172 |
Spot welding machine
A spot welding machine includes tip electrodes mounted on the tips of the first and second arms, respectively, a pressing actuator for moving at least one of the first and second arms to apply a...
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5378868 |
Shut off check valve for a welding gun
A shut off check valve for controlling cooling fluid flow to weld tips of a resistance welding gun. The valve is disposed within the weld gun housing and selectively interrupts cooling fluid flow...
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5349151 |
Low impact flow control device
A flow control system which is capable of selectively operating at least one pneumatic cylinder between high and low pressures. The flow control system allows the cylinder to engage a workpiece...
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5321225 |
Installation for controlling tooling including a clamp for performing a determined operation on workpieces, relative displacement of the clamp and said workpieces being controlled by an automatic positioning system
The welding operation performed by the clamp 12 is under the control of a welding cabinet 15 including a servo-control unit 16' and an electronic switch 17. The clamp is moved from one weld spot to...
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5288968 |
Resistance welding gun and apparatus
A method and apparatus for diagnosing various faults during resistance welding based upon electrode position. An electrode positioning bracket is coupled to the electrode. The position of the...
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5252801 |
Fixed point welding gun
A resistance welding gun which is adapted to prevent asymmetrical impacting of two or more metal sheets to be welded. The resistance welding gun includes a pair of rotatably connected arms, each of...
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5198633 |
Stopper device in a welding robot gun
A stopper device in a welding robot gun is capable of increasing the amount of movement of the upper arm and reducing the amount of movement of the lower arm or vice versa by adjusting the...
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5177337 |
Welding gun assembly and fluid actuated cylinder
An apparatus for applying a force to a workpiece as required in welding or clamping. The apparatus applies a force to the workpiece through a direct clamping action or through link enhanced scissor...
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5157234 |
C-type welding gun robot holding apparatus
A C-type welding robot gun holding apparatus having a pressure cylinder which is short in the longitudinal direction thereof and a welding robot gun which is low in height. The C-type welding robot...
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5128510 |
Spot welding tongs
An articulated pair of spot welding tongs comprising two supports (1,2) of the male and female type, each having a fork joint and an orifice, and two interchangeable arms (3,5), each carried by one...
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5115113 |
Spot welding method and apparatus having weld electrode lock-up
A method and apparatus for single-sided resistance spot welding that prevents excessive weld indentation. A first flat part and a tubular part are clamped between welding electrodes with a...
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5099099 |
Pressure applying device for resistance welding
Pressure applying device for resistance welding which includes a pair of two gun arms having an electrode tip at two opposed ends of the arms, a flexible supporting means connecting said two arms,...
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5091623 |
Welding gun provided with a backup cylinder
A welding gun provided with a backup cylinder is characterized in that the welding gun is moved toward a workpiece by a welding robot an end of which is connected to the welding gun via a bracket,...
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5091619 |
Apparatus for resistance bonding electromagnetic coils
An apparatus for passing an electrical current through an electromagnetic coil to perform a resistance bonding operation is disclosed. The apparatus includes a pair of pistons which are selectively...
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5036175 |
Welding gun having equalizing function
A welding gun comprises a base having a stopper at the tip end thereof and a vertical axis at the inside thereof, an arm having an electrode at the upper end thereof and a lower end slidably...
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5032704 |
Multi-pressure control system
A multi-purpose control system for a backup type welding gun and similar apparatuses including a positioning directional control valve for controlling the extension and retraction of the...
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5026963 |
C-type welding gun
There is disclosed a C-type welding gun provided with an air cylinder, an equalizer disposed over the air cylinder, a yoke disposed aside the air cylinder and the equalizing unit, a welding...
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4947018 |
Retracting rocker unit
A retracting rocker unit comprises a base 10 mounting a linkage 12 and a power unit 14 which cooperates with the linkage to move a welding electrode of clamping jaw from the position shown...
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4940875 |
Force limiting weld head
A force limiting weld head (11) which includes a supporting structure (13), a pressure barrel (15) and an output member (17) mounted for movement on the supporting structure, a fixed electrode (19)...
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4889967 |
Plural welding rod welding apparatus
Each electrode rod unit is composed by inserting into a cylindrical block an electrode rod which is linked to the cylindrical block through a conductive cable. The electrode rod unit is removable...
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4879447 |
Piston actuated welding gun with pivoting arm
A welding gun comprises a fixed arm having an electrode at an end thereof and integrated with a cylinder at the other end thereof and a pin at the middle portion of the fixed arm for swingably...
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4844326 |
Method of and system for assembling vehicle bodies
A system for assembling a vehicle body has a panel handling device provided with a panel holding tool for holding a body panel and a first welding gun for welding the body panel to a vehicle body....
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4825031 |
Weld gun control
A weld gun assembly including a support structure; a pair of arm members pivotally mounted intermediate their ends on the support structure on a common pivot axis; a weld tip at one end of each arm...
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4812612 |
Hydraulic lock for resistance welders
A hydraulic system for use in a resistance welding machine with a stationary electrode and a variable electrode to provide adjustment of the stationary electrode to ensure proper positioning to...
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