390results about "Power hammers" patented technology

The present invention provides a motor with a brake in which, after an initial stage, a voltage applied to the brake is reduced to thereby restrain heat generation in the brake. In the motor with a brake, after signal drive, a voltage of a drive signal supplied to an electromagnetic drive portion of the brake is reduced, whereby heat generation in the brake during motor rotation is restrained, which makes it possible to increase a load to be applied to the motor.

The invention discloses a variable-speed circumferential low-stress bending fatigue crack precise blanking machine and a blanking method of the variable-speed circumferential low-stress bending fatigue crack precise blanking machine. The variable-speed circumferential low-stress bending fatigue crack precise blanking machine comprises a variable-frequency motor, a large belt pulley, a V-shaped belt, a small belt pulley, a two-stage gear accelerator, a high-speed main shaft, a sliding rail supporting seat, a screw compression spring, a columnar hammer head, a feeding sleeve, a ball guide bushing, metal bars, a clamping hand, a clamping cylinder, a feeding cylinder, a hydraulic clamping feeding mechanism support, a machine body, a seat plate, a servo motor, a speed reducer, a coupler, a ball screw supporting seat, a screw, a nut, a ball screw, a deep groove ball bearing and a key. The variable-speed circumferential low-stress bending fatigue crack precise blanking machine is high in geometric precision of blanking workbanks, free of corner collapse and radial deformation, perpendicular and smooth in fracture section, few in burrs, and high in use ratio of material. The stress concentration effect, the resonance effect and the bending fatigue of an annular V-shaped groove are utilized to enable the critical value of the impact speed of vibration on the metal bars to be lower than the critical value of the speed in the high-speed shearing process, and the blanking machine is applicable to precise blanking of the metal bars of different materials.

The electrohydraulic hammer includes a frame, a hammer stem driving cylinder, a hydraulic source, a hammer stem with hammer head in the lower end and upper end connected to the piston inside the hammer stem driving cylinder, an upper cylinder chamber and a lower cylinder chamber in the ends of the piston, and an operating valve with valve body, a servo valve inside the valve body and valve core capable of sliding inside the servo valve. When the valve core is in different position inside the servo valve, the operating valve can close the oil inlet passage of the upper cylinder chamber, the oil exhaust passage, or both the oil inlet passage and the oil exhaust passage. Between the driving cylinder and the operating valve, there is one buffering cylinder with excellent buffering effect to avoid bumping top after the hammer head reaches the top dead point.

The invention provides a metal forge welding additional material manufacturing device and a forging method. The metal forge welding additional material manufacturing device comprises a work bin and a control unit connected with the work bin. The work bin is internally provided with a forging base plate, a machining unit and a moving unit. The moving unit is arranged at the side portion of the forging base plate. The machining unit is located on one side of the moving unit. The machining unit is located above the forging base plate when machining a workpiece. The machining unit comprises a preheating unit, a forging unit, a wire feeder and a wire storage device, all of which are sequentially arranged in the direction from the moving unit to the forging base plate. The forging unit comprises a forging hammer capable of reciprocating up and down, a forging area is formed between the lower portion of the forging hammer and the surface of the workpiece, the forging hammer reciprocates in the forging area, and accordingly the workpiece and a metal wire can be continuously forged. An inner microscopic structure in the manufactured material is a forging structure, grain is fine, the mechanical performance s good, air holes and other common welding metallurgical defects cannot occur, and the reliability and consistency of the metal additional material manufacturing component performance can be greatly improved.

A method of forming a body of a formable working material in an impact machine, which comprises an upper impact unit (29 with an upper ram (14), an upper punch (17), a lower impact unit (3) with a lower ram (24), a lower punch (27), and mould cavity for the working material between the punches when the punches are brought towards one another, is characterized in that downwards movable masses, which comprise at least the mass of the upper ram and the mass of the upper punch, and upwards movable masses, which include at least the mass of the lower ram and the mass of the lower punch, are caused to move towards one another and towards the working material in the mould cavity, that the masses which move downwards, including the upper punch (17) obtain a downwards directed velocity (v1) and those masses which move upwards, including the lower punch (27), obtain an upwards directed velocity (v2), wherein the movable parts have such masses and the velocities are so high that the momentums of the downwards movable masses and the upwards movable masses become essentially equally large, i.e. so that the following condition applies.where m1 is the total mass of the downwards movable masses during the stroke, and m2 is the total mass of the upwards movable masses during the stroke.

The invention discloses a mechanical double energy storage impact mechanism and a mechanical double energy storage impact method. The mechanism comprises a frame, a rotating shaft is arranged on the frame, the rotating shaft is fixedly connected with a swinging arm, the swinging arm is connected with a hammer head, a torsion spring is arranged coaxial with the rotating shaft, the swinging arm is fixedly connect to one end of the torsion spring, and the other end of the torsion spring is fixed on the frame. An electric driving mechanism and a first electromagnet are arranged on the frame, the first electromagnet is connected with a drag hook, a gear clutch is arranged on the electric driving mechanism, and a lever is movably connected to the frame and movably matched with the drag hook; and a second electromagnet is arranged on the frame through a mounting arm. The mechanism has two energy storage links, namely deformation energy storage of the torsion spring and elastic bending energystorage of the swinging arm, so that the contact stress during impacting can be effectively reduced and the working surface of a workpiece is well protected. By using the mechanism and the method, conventional heavy manual hammering can be replaced, and the labor intensity is lightened; and the mechanism can also be used for replacing the conventional starting pneumatic striker in the powder conveying process to prevent blockage.

The invention relates to an added material manufacturing system and method. The system comprises a material conveyor, an energy source and a micro forging device. The material conveyor is provided forconveying materials. The energy source is provided for enabling energy beams to point to the materials, and melts at least part of the materials to form cured parts. The micro forging device can movewith the material conveyor to forge the cured parts, and comprises a first forging hammerhead and a second forging hammerhead; the first forging hammerhead is provided for hammering the cured parts to generate a first deformation quantity; the second forging hammerhead is provided for hammering the cured parts to generate a second deformation quantity; and the second deformation quantity is higher than the first deformation quantity.

The invention relates to a method for the manufacture of an annular article, which substantially consists of metal, ceramic material, and/or polymer. A cavity in a die is filled with a formable working material, which shall form said article. A tubular, upper punch (17) is introduced into the upper mouth of a hole in a die (34), so that a closed mould cavity is formed. The upper punch and a lower punch (27) are simultaneously struck towards one another at such a high velocity that the working material is plasticized and flows out and fills the mould cavity, and thereafter the upper punch is removed. Then, a mandrel (35) in the lower punch is driven out of the annular body by means of a mandrel expulsor (170), which is pressed against the mandrel from above, and thereafter the annular body is from below pushed out of the die by mean of the lower punch. The invention also relates to an equipment for the carrying out of the method.

The invention relates to a forging device and discloses a hammer type forging device. The hammer type forging device comprises a main shaft, wherein the main shaft is fixedly connected with a heavy hammer; a vertical sliding chute is formed in the lower part of the heavy hammer; a heavy block is connected in the sliding chute in a sliding manner; a concave die is arranged at the lower part of the heavy block; a support lug is arranged on the peripheral surface of the heavy block and is located in a vertical strip-shaped hole of the sliding chute; a first elastic part is connected between the top surface of the support lug and the sliding chute; the main shaft is also fixedly connected with a gear; the gear is meshed with a rack; a fixed sliding chute is formed in the lower part of the rack; a second elastic part is arranged between the rack and the sliding chute; a cam presses against one side, far from the second elastic part, of the rack. Compared with the prior art, the heavy block of the device can transmit the force of the heavy hammer to blanks; the heavy block can dissolve the component of the horizontal force of the heavy hammer and only generate the vertical downward pressure, so that the size of the forged parts is more in line with the standard; the qualified rate of products is increased.

An opposed current flow magnetic pulse forming and joining system in electrical communication with a magnetic pulse power supply having a positive connection and a negative connection. The system may be used in forming individual workpieces or joining multiple workpieces, including joining by magnetic pulse welding. The system includes a first section, a second section, an insulator, and a first and a second pair of conductors. The first and second sections cooperate to enclose the workpiece(s) and function to create an electromagnetic force similar to that produced by a single closed coil. The system is configured to achieve desirable current flow by minimizing inductance, inductive reactance, and impedance in the conductors. The pairs of conductors may incorporate closely spaced individual conductors, braided conductors, and coaxial conductors. The current flow in the individual conductors of each pair of conductors is opposed, as is the current flow through the sections.

A multifunctional precision alternating-current servo swaging machine comprises a swaging head, a die rotation system, a variable diameter system and a body portion. The swaging head is a forming part. The die rotation system drives a die portion to rotate, so that a hammerhead can rotate by 360 degrees to swage a tubular bar part. The variable diameter system is used for variable diameter machining of a tubular bar. The body portion is used for supporting a whole operating mechanism of the swaging machine. The multifunctional precision alternating-current servo swaging machine has the functions of a spindle rotary forging machine, a rim rotary forming machine and a drum rotary forming machine, and has the advantages of flexibility and controllability, good stability, wide machining range and the like.

The invention discloses a fully-hydraulic counter-blow hammer, relates to forging and pressing equipment used in the forging industry, particularly relates to a counter-blow hammer driven hydraulically and provides a fully-hydraulic counter-blow hammer which is simpler in linkage structure and fewer in linkage fault. The fully-hydraulic counter-blow hammer provided by the invention comprises a hydraulic source (1), a control valve (2), an upper drive cylinder (3), a lower drive cylinder (4), an upper hammerhead (5), and a lower hammerhead (6), wherein the upper drive cylinder is divided into an upper drive upper cavity (31) and an upper drive lower cavity (32) via an upper hammer-rod piston (51); the lower drive cylinder is divided into a lower drive upper cavity (41) and a lower drive lower cavity (42) via a lower hammer-rod piston (61); the upper drive lower cavity (32) is hermetically connected to the lower drive lower cavity (42) to form an airtight accommodating cavity, and a liquid with a constant volume is fully filled in the airtight accommodating cavity; and the upper drive upper cavity (31) and the lower drive upper cavity (41) are switchably communicated with the hydraulic source (1) and an oil drainage channel respectively under the control of the control valve (2).

The invention discloses a high-frequency rotary precision-forging compounding method for metal composite tube and rod manufacturing. The high-frequency rotary precision-forging compounding method comprises the following main process steps: (1) cleaning workpieces; (2) preparing for compounding; (3) forging and compounding: putting to-be-compounded metal composite tubes/rods on a feeding rack of a high-frequency rotary precision-forging machine, introducing the to-be-compounded metal composite tubes/rods into the high-frequency rotary precision-forging machine to forge under the pushing of a feeding system of the high-frequency rotary precision-forging machine, and forging until inner and outer layers of composite metal tubes/rods are tightly compounded; (4) completing the compounding: if lining tubes at the inner layer are metal tubes, dropping out core rods. The high-frequency rotary precision-forging compounding method has the advantages of low power consumption, easy operation, high product manufacturing efficiency, high bonding strength, high product surface flatness, short process flow and safe production. Compared with an existing process, the cost of the equipment is greatly reduced, the maintenance cost is relatively low and the requirements on field are relatively low; a plurality of layers of different metal tube rods can also be compounded in a multi-layer mode.

The invention concerns an impact machine for forming a body with desired shape of a formable working material through impact action in a forming operation, said impact machine comprising a machine stand (6), an upper unit which comprises either a lower impact unit (3), which comprises a counter-impact device, or a stationary anvil, and a central unit between the upper and the lower units. The central unit (4) comprises one or more carriers (30), each of which containing and carrying one or a plurality of identically equal tool units (32), each of which comprising a die (34) with a mould cavity (46) for the working material (90) intended to be formed, said carriers including at least one carrier which is stationary during the forming operation and which contains at least one such tool unit, and that motion devices (7) are provided for indexing the carrier or carriers in a horizontal plane for positioning the tool units in different function stations (I-V), comprising a forming station (II) and at least one more station.

The invention relates to a roll forging integrated process of high-strength and high-hardness alloy and a piece of roll forging device thereof. The process mainly comprises the following processing steps: a main frame and an eccentric roller arranged on the main frame make an advance and return movement along the axial direction of the blank; the eccentric roller is continuously and repeatedly separated from the blank during the advance and return process, then falls down to forge, and rolls the blank until the processing is completed. The device for roll forging high-strength and high-hardness alloy consists of four parts, namely a feeding device, a main frame, a discharging device and a drive mechanism of the main frame. The process is simple, practical and efficient. The structure of the device is simple and compact. The process can save the material in the processing of the high-strength, high-hardness and refractory alloy materials with more than 200 HB, such as the refractory metal such as tool steel, roll steel, tungsten, molybdenum, tantalum, niobium, and alloy thereof, and titanium alloy, and improves the mechanical property of products.

The invention discloses an air hammer. The air hammer comprises a motor, a reducer, a connection rod mechanism, a compression air cylinder, a working air cylinder and an anvil block; the output end of the motor is connected with the reducer; the reducer is connected to one end of the connection rod mechanism; the other end of the connection rod mechanism is connected with a piston rod of the compression air cylinder; the compression air cylinder is connected with the working air cylinder through a first air transmission pipe and a second air transmission pipe; the piston rod of the working air cylinder is provided with upper pressing iron; the anvil block is positioned below the upper pressing iron, and is provided with lower pressing iron; the air hammer also comprises a switching device which can switch compressed air between the compression air cylinder and the working air cylinder; and the switching device is arranged on the first air transmission pipe and the second air transmission pipe respectively. The air hammer can suspend, continuously hammer, and press a workpiece and can also hammer the workpiece once. The air hammer can fully process the workpiece.

The invention provides a portable hydraulic electro-hydraulic hammer, comprising a base, hydraulic source, an oil cylinder, a hammer head and a hammer rod, a valve body, a tracing valve and a valve core; the upper end of the hammer rod is connected with a piston; the upper end and the lower end of the piston are provided with an upper cylinder chamber and a lower cylinder chamber; the effective working area of the upper cylinder chamber is more than the effective working area of the lower cylinder chamber; the upper part and the lower part of the oil cylinder wall are respectively provided with a plurality of through holes; the oil cylinder is sheathed in the internal chamber of an external cylinder; the external cylinder passes through the base; the external cylinder is provided with a connecting pipe at the lower part of the base; the medium of the hydraulic source enters the internal chamber of the oil cylinder through a connecting pipe and the through holes below the oil cylinder; the upper end of the external cylinder is connected with a nut by screw thread; a damping device is arranged between the upper end of the oil cylinder and the nut; the medium of the hydraulic source enters the damping device through a pipeline and an oil inlet of the external cylinder; a valve sleeve is arranged inside the valve body which is arranged on a valve seat; the lower end of the base is communicated with the oil tank by an oil pipeline; the tracing valve wall is provided with a through hole. The portable hydraulic electro-hydraulic hammer of the invention has simple structure, convenient maintenance and smaller volume.

The invention discloses a middle hammering device for forging a Luoyang shovel and relates to the technical field of production and machining of Luoyang shovels. The middle hammering device for forging the Luoyang shovel solves the problems that in the using process of an existing hammering device for a Luoyang shovel, the labor intensity of workers is large, the control difficulty of products ishigh, and meanwhile the production efficiency is low. The middle hammering device for forging the Luoyang shovel comprises a body. A set of sliding table is connected to the top of the body in a sliding mode. A set of feeding table is connected to the top of the sliding table in a sliding mode. A set of flywheel is connected to the inner side of the upper portion of the body in a shaft mode. A setof driven belt wheel and a set of middle gear are connected to the inner side of the rear end face of the body in a shafting mode. The rear end face of the flywheel is coaxially and fixedly connectedwith a motor. By means of the device, automatic pressing in the feeding process can be achieved, repeated hammering to workpieces can be achieved, feeding operation by workers is not needed, manpoweris saved, the dependence on the technical ability of workers is removed, the yield can be better ensured, the working efficiency is greatly improved, and the middle hammering device is easy to operate and convenient to use.

The invention relates to a connecting rod press machine with a swinging guide rod. The press machine comprises a swinging guide rod mechanism, a punching hammer connecting rod and a punching hammer, wherein the swinging guide rod mechanism consists of a machine frame, a crank, a slide block and a swinging rod, the crank is respectively connected with the machine frame and the slide block through a rotating pair, the slide block is connected with the swinging rod through a moving pair, the swinging rod is respectively connected with the machine frame and the punching hammer connecting rod through a rotating pair, the tail end of the punching hammer connecting rod is connected with the punching hammer through a rotating pair, and the punching hammer is fixedly arranged in a fixed guide rail. An ordinary constant-speed motor is utilized for driving a combination mechanism with the swinging guide rod, good low-speed forging punching fast return characteristics can be realized, in addition, the structure of the press machine is simple and compact, and the manufacture cost is low.

The invention relates to a hammering device, in particular to a Luoyang shovel middle hammering device. The Luoyang shovel middle hammering device can automatically hammer the Luoyang shovel, adjust the hammer force and improve the working efficiency. The Luoyang shovel middle hammering device comprises a mounting bottom plate, a workbench, a rotating shaft, a hammer, a limiting part, a force adjusting part, a power assembly and the like; the workbench is arranged on the right side of the top of the mounting bottom plate, the rotating shaft is arranged on the left side of the top of the mounting bottom plate, the hammer is arranged on the rotating shaft, and the limiting part for fixing a handle of a Luoyang shovel through a sliding mode is arranged on the left side of the top of the mounting bottom plate. According to the Luoyang shovel middle hammering device, through the matching of the power assembly and the force adjusting part, the hammer can be driven to swing up indirectly to hammer the Luoyang shovel continuously, manpower is saved, meanwhile the hammer force of each time is same, and the quality of the Luoyang shovel is ensured.

The invention relates to a forging method for reducing the proportion of tiny crack defects of a bearing. The forging method aims at solving the problems that a die used in an existing high-performance bearing forging technology influences changes of a streamline of a material section, and defects are likely to occur in a forged part. The forging method specifically comprises the following steps that firstly, the material section is upset, wherein the material section is thumped by a 450Kg air hammer, and the number of thumping times ranges from 10 to 22; secondly, single-face stamping expansion is carried out, wherein the thumped forged piece is subjected to single-face stamping expansion; thirdly, stamping expansion is carried out repeatedly, wherein the corresponding face of the forced piece obtained through single-face stamping expansion in the second step is subjected to stamping expansion, and the operation in the second step and the operation in the third step are repeated 2-3 times; fourthly, rolling expansion is carried out, wherein before rolling expansion is carried out, a rolling expansion wheel is preheated, and the forged piece obtained after repeated stamping expansion is subjected to rolling expansion after the temperature of the rolling expansion wheel reaches 150-200 DEG C. The forging method is used for the field of bearings.

A method of producing a body from a particulate or solid material comprises filling a precompacting mould with the material, optionally vibrating the mould, pre-compacting the material and compressing it by at least one stroke with high kinetic energy in order to cause coalescence or high density of the material.