摘要:
Apparatus and method for compensating uneven gravity filling with powder material of a die cavity formed on the top of a punch reciprocable in a bore in a die plate, the punch having an end face normally parallel to the surface of the die plate. The punch is mounted on an adjustable support member split into portions having each an end face disposed parallel to the end face of the other portion. The two portions have a common surface of junction disposed in a plane at an angle to the parallel end faces. The two portions are rotated together to orient the surface of junction in the direction of inclination of the punch, and the two portions are independently rotated the same amount in opposite directions as a function of the desired angle of inclination of the punch.
摘要:
A press apparatus for compacting powder material into generally spherical articles by way of a tooling arrangement comprising a die having a bore, a punch having an upper face defining a generally hemispherical cavity reciprocably movable along the axis of the die bore and a counterpunch positionable over the opening of the die bore. The lower face of the counterpunch defines a generally hemispherical cavity of the same diameter as the generally hemispherical cavity defined by the face of the punch. The generally hemispherical cavities are in alignment with each other and define a spherical mold cavity. During the compacting step, the counterpunch is positioned with its lower face abutting the upper surface of the die plate and compaction of the powder material is achieved entirely by movement of the punch in an upward direction.
摘要:
An apparatus for transferring elongated parts travelling on a first conveyor to a receptacle travelling on a second conveyor, the parts being placed singly in consecutive rows in the receptacle in a substantially vertical position. The apparatus comprises a part pick-up unit having a part pick-up member mounted on a slide. The part pick-up unit is positioned such as to enable the part pick-up member to pick up a part at the end of the first conveyor, and the part pick-up member, mounted on the output shaft of a rotary actuator, is rotated such as to rotate the part from a horizontal position to a vertical position during travel of the part pick-up unit and of the slide from the part pick-up position to the part-loading position. The part pick-up member has a pair of pivotable fingers for grasping the part or, in the alternative, the part pick-up member is in the form of a tubular member in which a portion of the part is introduced, and suction applied to the interior of the tubular member holds the part during transportation of the part from the pick-up position to the loading position.
摘要:
An apparatus and method for transferring parts travelling in a single row on a first conveyor to a receptacle travelling on a second conveyor, the parts being placed in the receptacle in consecutive rows of a plurality of the parts. A part loader, comprising an elbow-joint arm having a pivotable first arm and a second arm mounted on the end of the first arm pivotable relative to the first arm, supports a part pick-up member mounted on the end of the second arm which picks up at least one part from the end of the first conveyor and transfers the part to the receptacle on the second conveyor. Alternatively, the part pick-up member is adapted to pick up a row of parts from the first conveyor and to place one row of parts in the part receptacle, or to rotate a part during transfer from the first conveyor to the part receptacle.
摘要:
A method for compacting articles made of powder material at a constant density, or at a density within a range. An example of apparatus for practicing the method of the invention takes the form of a hydraulic piston-cylinder assembly, defining a chamber which is filled with an uncompressible hydraulic fluid, disposed in the coupling between the actuating member of a mechanical press ram and the ram. The hydraulic fluid is pressurized by a compressed compressible fluid, such as air, acting on a large area piston directly coupled to a small area piston disposed in a small diameter cylinder filled with the uncompressible hydraulic fluid and in communication with the chamber, the ratio in the areas of the pistons determining the pressure amplification rate or gain. When the press ram meets a resistance to its travel which is large enough to overcome the pressure of the hydraulic fluid in the chamber, the volume of the chamber is decreased with the result that hydraulic fluid is introduced in the small diameter cylinder, thus displacing the small area and the large area pistons against the pressure of the compressible fluid, cushioning the impacts and shocks to which the ram is subjected in operation, and effecting compaction at constant pressure, or at a pressure within a range.
摘要:
A die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die. The invention provides individual longitudinal position adjustment for the core rods by fitting the end of the core rods in a threaded member such as a set screw threading in a bore in the core rod support plate. Alternatively, the invention provides for position adjustment of the core rod support plate by supporting the support plate below the die plate by spacer sleeves having a threaded peripheral portion threading in a bore in the core rod support plate. By combining an adjustable core rod support plate with individually adjustable core rods, the core rods can be adjusted longitudinally relative to each other, and in unison by way of the position adjustment provided for their support plate.
摘要:
A unitary punch and die assembly for tooling a powder material compacting apparatus, or press, the assembly comprising a die plate mounted in the press table, which removably holds a die bushing clamped in position by a retainer collet provided with a peripheral thread and an internal thread. The retainer collet has an internal shoulder engaging a shoulder at the base of the die bushing, and a clamping ring threads on the internal thread of the collet for holding the die bushing in position within the collet. The peripheral thread of the collet engages the corresponding internal thread of a die spacer on which the die plate is mounted. By means of the retainer collet and the clamping ring, the die bushing surface may be adjusted flush with the surface of the die plate, without requiring grinding or lapping of the die bushing after assembly of the die bushing in the die plate.
摘要:
In a die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die, the invention provides individual longitudinal position adjustment for the core rods by clamping the end of the core rods in a collet-like threaded member such as a slotted set screw threading in a threaded bore in a core rod support member. The core rod support member is preferably in the form of a pair of plates one bolted below the other. The end of each core rod is immobilized in its adjusted position by being disposed in an axial bore in the collet-like threaded member and by being clamped between the sidewalls of a longitudinal slot extending part of the length of the set screw, as a result of the tendency of the slot to close when the set screw is driven through the lower plate with its tapered end engaged with a tapered surface at the end of an aligned bore in the upper plate.
摘要:
A lapping method and apparatus providing accurate lapping of a workpiece surface and substantially even wear of the lap surface in the course of a lapping operation cycle. The workpiece having a surface to be lapped is held in an oscillating plate reciprocated along a first axis, and displaced at a much lower rate along a second axis. The plate is reciprocated along the first axis by means of a rigid link pivotally attached at one end to the plate and at another end to a rotating eccentric. The plate is displaced along the second axis by means of a pair of rigid parallel links pivotally attached to the plate at one end and pivotally attached each to a rotating eccentric at their other end.
摘要:
A powder compacting press provided with a mechanical toggle mechanism for reciprocating a ram disposed above the die supporting the table of the press, the pivotable support for the ram toggle upper connecting rod being connected to the movable member of a fluid cylinder. Fluid pressure in the cylinder urges the movable member to an extent limited by abutments, thus tending to displace the ram in a direction toward the table. The full force exerted on the ram by the toggle mechanism causes retraction of the fluid cylinder movable member until engagement of a second pair of abutment means cause the full force developed by the toggle mechanism to be exerted on the ram. The same cam is used for actuating the ram irrespective of whether the ram is used for clamping an anvil in position over a die cavity when the press is used in an anvil pressing mode, or for reciprocating upper punches, when the press is used in an opposed punch operating mode.