摘要:
For the manufacture of miter-welded profile rod frames by friction welding, a welding apparatus with friction welding units is used with which permits the welding of all miter joints of a frame to be made concurrently within a very short period and with very little displacement of welding material.
摘要:
The invention is directed to a process for the laser welding of two filter half-trays made of plastic and used in automatic transmission oil filters, wherein two filter half-trays are placed one on top of the other and welded along their common edge using laser light, one filter half-tray consisting of laser light-permeable plastic and the other filter half-tray of laser light-impermeable plastic, and the laser beam is passed through the laser light-permeable filter half-tray along the position of contact with the other filter half-tray, striking the laser light-impermeable filter half-tray, and co-fusing of the two filter half-trays within the welding zone is achieved by light absorption of the laser light-impermeable plastic material.
摘要:
An orbital vibration generator means comprising, in addition to a clamp 4, 5 for holding a pair of thermo plastic pipes coaxially and a pressurizing means 2, 3, 14 for bringing into contact under a pressure junction end faces of a pair of thermo plastic pipes 10, 11 held by these clamps, a crank shaft 8 having a shaft portion 8a and a crank portion 8b in which the axes of these shaft portion 8a and crank portion 8b are eccentric, a motor 6 for giving rotation to the crank shaft 8, a bearing 9 attached to the crank portion 8b of said crank shaft 8, and a orbital vibration clamp 13 holding pipe an end portion of a thermo plastic pipe, formed integrally with the outer ring of the bearing 9 to move integrally with said bearing.
摘要:
A novel method and apparatus are provided for making an improved welded joint between overlapping lengths of thermoplastic strap. The welded joint includes a central region and an adjacent peripheral region. The pressure on the strap joint during formation is released first in the peripheral region and subsequently in the central region. An embodiment of the apparatus for making such a joint includes an anvil, a central strap-engaging member, a peripheral strap engaging member, and a mechanism for moving the anvil sequentially to three positions. At a first position the overlapping strap lengths are pressed between the anvil and both the central and peripheral strap-engaging members. In the second position of the anvil the peripheral strap-engaging member does not press against the strap lengths while the central strap-engaging member continues to press the strap lengths against the anvil. In the third position of the anvil, the anvil and strap-engaging members are sufficiently spaced apart to release all of the pressure on the strap lengths.
摘要:
A novel method and apparatus are provided for making an improved welded joint between overlapping lengths of thermoplastic strap. The welded joint includes a central region and an adjacent peripheral region. The pressure on the strap joint during formation is released first in the peripheral region and subsequently in the central region. An embodiment of tile apparatus for making such a joint includes an anvil, a central strap-engaging member, a peripheral strap engaging member, and a mechanism for moving the anvil subsequently to three positions. At a first position the overlapping strap lengths are pressed between the anvil and both the central and peripheral strap-engaging members. In the second position of the anvil the peripheral strap-engaging member does not press against the strap lengths while the central strap-engaging member continues to press the strap lengths against the anvil. In the third position of the anvil, the anvil and strap-engaging members are sufficiently spaced apart to release all of the pressure on the strap lengths.
摘要:
An electromagnetically actuated friction welder produces orbital motion at interfaces between parts (usually of thermoplastic material) to bond the parts by fusion generated by friction. This welder can also be operated alternatively to produce reciprocating vibratory forces thereby providing flexibility as to the selection of an orbital or reciprocating mode, depending upon the joint to be welded. The velocity of motion is controllable preferably around the resonant frequency of the driven structure by adjusting the frequency of the AC power which operates the electromagnetic drive motor of the welder. A plate which carries one of the parts to be welded and which is driven is flexurally mounted for movement in an orbital plane or planes containing the interfaces without substantial tilting by an array of stiff members, such as rods, located around the drive motor, attached to the plate at one end and to a tubular structure at the opposite ends thereof. The tubular structure is desirably attached to a massive support carried by the frame of the welder.
摘要:
A friction welding apparatus for welding a pair of members in which the welding surfaces of the members are contacted under pressure with each other, relative circular orbit motion of the members producing friction therebetween thereby heating and melting the welding surfaces and the relative circular orbit motion being stopped to locate the welding surfaces in a predetermined position. The apparatus comprises an eccentric device including a rotary driving shaft, an inertia member disposed around the periphery of the rotary driving shaft, the inertia member being rotated by the rotary driving shaft and being capable of subjecting an angular movement relative thereto and an eccentric shaft rotated by the rotary driving shaft and engaged with the inertia member so as to be moved by the relative angular movement of the inertia member relative to the rotary driving shaft between a co-axial position with the axis of the rotary driving shaft and an eccentric position spaced by a predetermined distance apart therefrom, a movable table engaged through a bearing with the eccentric shaft for supporting the member to be welded, the movable table being connected by a motion restricting device to a fixed frame to be capable of causing substantial relative circular orbit motion in a plane perpendicular to the axis of the rotary driving shaft, the inertia member being angularly moved by rapid increase in the speed of the rotary driving shaft relative thereto from a first position to a second position such that the eccentric shaft is moved from the co-axial position to the eccentric position and the movable table is put in the relative circular orbit motion, and the inertia member being returned by rapid stoppage of the rotary driving shaft from the second position to the first position such that the eccentric shaft is returned to the co-axial position and the movable table is stopped at the predetermined position.
摘要:
A method of forming a weld joint is provided. A first component having a base portion and a flange extending from the base portion is provided. A second component is provided. The second component and the flange are brought into abutment and a load is applied to the flange via the second component. The flange is biased against the second component by a reaction of the first component to the load. One of the first and the second components is vibrated to form a weld joint between at least a part of the second component and at least a part of the flange.
摘要:
The invention relates to a method for welding a polyolefin plastic and a plastic based on at least one polymer containing carbonyl groups, using a primer which contains, in relation to the proportion of polymer in said primer, at least 20 wt. % of a polymer that comprises maleic anhydride or maleic anhydride derivative units. The invention also relates to correspondingly welded products.
摘要:
The invention relates to a method for bonding two different plastics using a primer. The two plastics which are to be joined to each other have a weighted quadratic distance between the Hansen parameter (Ra)2 of more 22 MPa and the primer contains a polymer which has a weighted quadratic distance between the Hansen parameter (Ra)2 of less than 22 MPa to both of the plastics which are to be joined. The invention also relates to correspondingly bonded products.