Method for acquiring values of trigger angle and extinguishing angle in real time in alternating current resistor spot welding

The invention relates to a method for acquiring the values of a trigger angle and an extinguishing angle in real time in alternating current resistor spot welding, which belongs to the technical field of welding. The method comprises the following steps of: arranging a Hall current sensor on a primary loop of an alternating current spot welder so as to measure a welding current value of the primary loop and starting a welding cycle while starting a computer to collect welding current data; acquiring a trigger angle and an extinguishing angle by processing a collected and stored welding current wave in the computer by a sub-sectional spline interpolation method; acquiring a conduction angle by subtracting the trigger angle from the extinguishing angle; and acquiring a dynamic resistance through a power factor angle. The method of the invention can acquire an accurate phase values of the trigger angle and the extinguishing angle so as to acquire a reliable dynamic resistance curve, and avoid ...

Device for monitoring electrode amplitude in resistance spot welding

The invention relates to a device for monitoring electrode amplitude in resistance spot welding. The device comprises an acceleration sensing measurement device, a signal conditioner, a data acquisition card and an industrial control computer, wherein the acceleration sensing measurement device is fixed on an upper electrode of the spot welder; the acceleration sensing measurement device is connected with the signal conditioner to transmit an acceleration analog signal; the signal conditioner is connected with the data acquisition card to transmit a conditioned acceleration analog signal; the data acquisition card is connected with the industrial control computer to transmit an acceleration digital signal, and an upper electrode amplitude signal is output by the industrial control computer. The invention can decide the occurrence of spatters in real time according to the electrode amplitude; the acceleration sensing measurement device of the electrode amplitude is not necessary to cross ...

Shrinkage fit connecting method of worm-gear and leadscrew nut for electric cylinder

The invention relates to a method for connecting a worm wheel of an electric cylinder and a feed screw nut through shrinkage fit in the technical field of mechanical engineering. The method adopts shrinkage fit for connection; the worm wheel in the electric cylinder is directly and fixedly connected with the feed screw nut: step one, a copper worm wheel is put into a resistance furnace, and the temperature of the resistance furnace is set to between 190 and 210 DEG C; step two, a temperature measuring sensor is put on the copper worm wheel for measuring the temperature of the copper worm wheel, and when the temperature of the copper worm wheel rises between 190 and 210 DEG C, the the inside diameter of a copper worm wheel hole is expanded to reach requirement of shrinkage fit; step three, the worm wheel is sleeved with the feed screw nut, and in the sleeve process, the clearance amount between the feed screw nut and the worm wheel is kept even; and step four, when the worm wheel enters ...

Apparatus for prolonging service life of sealed mechanism lubricant by filling with inert gas

The invention relates to a device and a method for prolonging service life of lubricant of a hermetic closure mechanism by inflating inert gas in the technical field of the lubricant. The device comprises the hermetic closure mechanism and an inert gas storage device, wherein the hermetic closure mechanism is provided with a gas inlet adjusting device and a gas outlet adjusting device. The inert gas is inflated into the hermetic closure mechanism to empty air, moisture, corrosive gases, impurities and the like in the hermetic closure mechanism; and even if the leakage is little, outside air is effectively prevented from infiltrating, as gas pressure in the hermetic closure mechanism is slightly larger than that of the outside air, so that the aims of protecting the lubricant from oxidation, prolonging service lives of the hermetic closure mechanism and the lubricant can be achieved. The method does not need to repeatedly supply and replace the lubricant, and reduces failure rate of the ...

Converter molten steel temperature detection system

The invention discloses a converter molten steel temperature detection system which comprises a support mechanism, a guide rail, an image acquisition device, a pneumatic device, an operating box and a processor, wherein the support mechanism comprises a welding plate and a supporting plate; the welding plate is fixed on a rib plate of a converter fire barrier; the supporting plate is fixed on the welding plate; the guide rail is fixed on the supporting plate and is embedded with the image acquisition device; a proximity switch is arranged between the guide rail and the image acquisition device; the image acquisition device comprises an industrial camera, a probe part, a stainless steel tube and a stainless steel tube sealing cover; the probe part is fixed at one end of the stainless steel tube; a lens is arranged at one end, which is far away from the stainless steel tube, of the probe part; the industrial camera is arranged at the other end of the stainless steel tube; the pneumatic device ...

铁炮模型的设定、修正方法

Cone drums are designed and corrected as following steps: 1) measuring rove tension after roving, 2) adjusting the radial yarn density of each layer till the end of roving, 3) inputting the adjusting data into a computer, 4) making the said data meeting the demands of matching with same pair of cone drums and radial yarn density by correcting the said data according to the software in the computer, and 5) processing the corrected data to obtain cone drums correcting model. The method can obtain cone drums curves rapidly and meet the demand of quality after a rover is put into production.

Resistance spot welding quality control device and method based on electrode displacement

The invention discloses a quality control device and a method for resistance spot welding based on electrode displacement, which belongs to the technical field of welding. 380V alternating current power supply is added to the input end of a primary loop; under the controllable trigger of an anti-parallel thyristor; the alternating current voltage is reduced by a transformer and the welding energyis switched to a secondary loop; the heavy current acquired from the secondary loop welds workpieces; a spot welding part of the workpiece generates heat expansion and the expansion capacity is measured by an electrode displacement sensing device; a spot welding quality controller collects the displacement measured value of the electrode displacement sensing device and processes the numerical value to acquire the estimation of splashing prevention judgment and nugget size, thus acquiring a welding current control voltage signal and transmitting the signal to a trigger driving circuit; the trigger ...

Device for monitoring electrode amplitude in resistance spot welding

The invention relates to a device for monitoring electrode amplitude in resistance spot welding. The device comprises an acceleration sensing measurement device, a signal conditioner, a data acquisition card and an industrial control computer, wherein the acceleration sensing measurement device is fixed on an upper electrode of the spot welder; the acceleration sensing measurement device is connected with the signal conditioner to transmit an acceleration analog signal; the signal conditioner is connected with the data acquisition card to transmit a conditioned acceleration analog signal; thedata acquisition card is connected with the industrial control computer to transmit an acceleration digital signal, and an upper electrode amplitude signal is output by the industrial control computer. The invention can decide the occurrence of spatters in real time according to the electrode amplitude; the acceleration sensing measurement device of the electrode amplitude is not necessary to cross ...

Environment protection hydraulic auxilary power system of hoisting machinery

Method for acquiring values of trigger angle and extinguishing angle in real time in alternating current resistor spot welding

The invention relates to a method for acquiring the values of a trigger angle and an extinguishing angle in real time in alternating current resistor spot welding, which belongs to the technical field of welding. The method comprises the following steps of: arranging a Hall current sensor on a primary loop of an alternating current spot welder so as to measure a welding current value of the primary loop and starting a welding cycle while starting a computer to collect welding current data; acquiring a trigger angle and an extinguishing angle by processing a collected and stored welding current wave in the computer by a sub-sectional spline interpolation method; acquiring a conduction angle by subtracting the trigger angle from the extinguishing angle; and acquiring a dynamic resistance through a power factor angle. The method of the invention can acquire an accurate phase values of the trigger angle and the extinguishing angle so as to acquire a reliable dynamic resistance curve, and avoid ...

Real-time detection method for resistance spot welding quality based on electrode displacement fluctuation

The invention discloses a real-time detection method for resistance spot welding quality based on electrode displacement fluctuation in the technical field of welding. The real-time detection method comprises the steps of: measuring electrode displacement by using a raster displacement sensor; carrying out data acquisition by using an industrial personal computer to obtain an electrode displacement curve, and extracting a displacement fluctuation peak value on the electrode displacement curve to obtain a displacement fluctuation peak value curve; calibrating and extracting the serial numbers and the displacement fluctuation peak values of four characteristic points on the displacement fluctuation peak value curve; and correspondingly providing one detection result of poor soldering, undersize nugget, qualification and welding splatter on the quality of the welding points by using the serial numbers and the displacement fluctuation peak values of the first characteristic point, the third ...

Vortex type non-contact suction cup

The invention relates to swirl non-contact type sucker, belonging to semiconductor manufacture technical field, which comprises a cup body, an intracavity aerodynamic body and a nozzle, wherein the cup body inner is a cylindrical hole body; the intracavity aerodynamic body is arranged at the bottom of the cup body; the column annular clearance is reserved between the cup body and the intracavity aerodynamic body; a nozzle is arranged at the lateral face near the bottom of the cup body. The invention can realize two purpose of workpiece sucking and guaranteed non-contact of workpiece and sucker. The swirl non-contact type sucker has the advantages of simple technology, small air consumption and big suction.

Apparatus and method for prolonging service life of sealed mechanism lubricant by filling with inert gas

The invention relates to a device and a method for prolonging service life of lubricant of a hermetic closure mechanism by inflating inert gas in the technical field of the lubricant. The device comprises the hermetic closure mechanism and an inert gas storage device, wherein the hermetic closure mechanism is provided with a gas inlet adjusting device and a gas outlet adjusting device. The inert gas is inflated into the hermetic closure mechanism to empty air, moisture, corrosive gases, impurities and the like in the hermetic closure mechanism; and even if the leakage is little, outside air is effectively prevented from infiltrating, as gas pressure in the hermetic closure mechanism is slightly larger than that of the outside air, so that the aims of protecting the lubricant from oxidation, prolonging service lives of the hermetic closure mechanism and the lubricant can be achieved. The method does not need to repeatedly supply and replace the lubricant, and reduces failure rate of the ...

Compound leather bag hydraulic accumulator

The invention relates to a compound peltry hydraulic accumulator and belongs to the mechanical engineering hydraulic technology field. The hydraulic accumulator comprises an charging cap, an charging port, a brass spiral spring belt, a small peltry, a copper wire net, a big peltry, a steel shell, a hydraulic inlet/outlet and a bacterial-type lifting valve; wherein, the small peltry is arranged in the big peltry; the nitrogen in the small peltry does not communicate with the nitrogen in the big peltry; the charging cap is connected with the charging port; the small peltry is connected with the charging port; the copper wire net is bound up outside the peltry; the pure copper wire net is sleeved outside the small peltry at the upper part of the copper wire net via an elastic brass spiral spring belt; the big peltry is connected with the charging port; the steel shell is connected with the charging port via threads; the hydraulic inlet/outlet is arranged at the bottom of the steel shell, and ...

Vortex type non-contact suction cup

The invention relates to swirl non-contact type sucker, belonging to semiconductor manufacture technical field, which comprises a cup body, an intracavity aerodynamic body and a nozzle, wherein the cup body inner is a cylindrical hole body; the intracavity aerodynamic body is arranged at the bottom of the cup body; the column annular clearance is reserved between the cup body and the intracavity aerodynamic body; a nozzle is arranged at the lateral face near the bottom of the cup body. The invention can realize two purpose of workpiece sucking and guaranteed non-contact of workpiece and sucker. The swirl non-contact type sucker has the advantages of simple technology, small air consumption and big suction.

Hydraulic brake regenerating energy-saving device for city public vehicles

The invention provides an energy saving device added to a public vehicle. It is comprised of transmission gear 1, hydraulic clutch 2, oil pump/oil motor 3, energy storage device 4, hydraulic control system 5 and electric control system 6. Its structure is more simpler than that of existing technology. The device can store the braking decelerating dynamic energy and reuse it as motive power for next start and acceleration.

Resistance spot welding quality control device and method based on electrode displacement

The invention discloses a quality control device and a method for resistance spot welding based on electrode displacement, which belongs to the technical field of welding. 380V alternating current power supply is added to the input end of a primary loop; under the controllable trigger of an anti-parallel thyristor; the alternating current voltage is reduced by a transformer and the welding energy is switched to a secondary loop; the heavy current acquired from the secondary loop welds workpieces; a spot welding part of the workpiece generates heat expansion and the expansion capacity is measured by an electrode displacement sensing device; a spot welding quality controller collects the displacement measured value of the electrode displacement sensing device and processes the numerical value to acquire the estimation of splashing prevention judgment and nugget size, thus acquiring a welding current control voltage signal and transmitting the signal to a trigger driving circuit; the trigger ...

Completely sealing electric cylinder using bellow and sealing method

The invention relates to a hermetically sealed electric cylinder adopting a sylphon bellows in the technical field of electric cylinders and a sealing method thereof. In the invention, the sylphon bellows is sleeved on a fixing sleeve of the electric cylinder, wherein the minimum diameter of the sylphon bellows is greater than the radius of the fixing sleeve, a moving sleeve is sleeved on the fixing sleeve, wherein the minimum diameter of the sylphon bellows is equal to the radius of the moving sleeve, and then two ends of the sylphon bellows are respectively welded on the fixing sleeve and moving sleeve of the electric cylinder, one end of the sylphon bellows is welded with the end of the fixing sleeve, and the other end of the sylphon bellows is welded with the side wall of the moving sleeve, therefore, the sylphon bellows is sealed on the electric cylinder to form a frontally sealed electric cylinder. The invention not only solves the leakage problem of the electric cylinder, but solves ...