JP2017047617A - Vibration welding method and vibration welding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration welding method capable of shortening the cycle time.SOLUTION: There is provided a vibration welding method, which includes: a heating step which heats, by a heater 32, a workpiece 2 loaded on a receiving jig 22 that constitutes a workpiece carrying mechanism 20 and carried to a heating stage S1; and a welding step which abuts the heated workpiece 2 loaded on the receiving jig 22 and carried to a welding stage S2 against a workpiece 4 held by a holding tool 14, and gives vibration to an abutted part between the workpieces 4 and 2 via the workpiece 4 so as to vibration-weld the abutted part. A pair of the receiving jigs 22 is used, and the receiving jigs 22 are moved in an associated manner between both of the stages S1 and S2 so as to execute the heating step S1 and the welding step S2 simultaneously.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vibration welding method and a vibration welding apparatus that apply vibration to a contact portion between synthetic resin workpieces, and more particularly to a vibration welding method and a vibration welding apparatus that are effective in manufacturing a vehicular lamp.

  A vibration welding method is known in which vibration is applied to the abutting portions of thermoplastic resin workpieces, and the abutting portions are melted and bonded by frictional heat accompanying vibration, such as when the lamp body and the front cover are welded. Widely used in the lighting industry.

  In Patent Document 1 below, prior to the vibration welding process, the bonding surface of one workpiece (particularly the lower hardness workpiece) is preheated to suppress the occurrence of dust burrs and fluffing burrs at the welded portion. Thus, a method has been proposed in which the appearance of the lamp appearance is improved.

  Specifically, in the vibration welding process, as shown in FIG. 5B, the leg b1 of the lamp cover b is brought into contact with the flange part a1 of the lamp body a, and the flange part a1 and the leg b1 are interposed via the lamp cover b. The contact portion is vibrated, and the corresponding contact portion is melted and adhered by frictional heat. Since the flange portion a1 is preheated and softened by the heater c in the preheating step (see FIG. 5A) prior to the welding step, the flange portion a1 is melted at the time of vibration welding shown in FIG. 5B. The time to reach is short, and the generation of powder burr a2 and yarn burr (also called fluff burr) a3 is small.

JP 2014-148099 A (see paragraphs 0010, 0017, paragraphs 0025, 0026, FIG. 1)

  However, in order to carry out the method described in Patent Document 1, conventionally, as shown in FIG. 6, the lamp body mounting receiving jig d and the lamp cover holding holder which are arranged to face each other in the vertical direction. Since the preheating process was also performed by putting the heater c in and out of the welding stage having the vibration welding process provided with e, the cycle time was long.

  Specifically, first, as shown in FIGS. 6A and 6B, in the welding stage, the receiving jig d and the holder e are largely separated in the vertical direction, and the lamp body a and the lamp cover b are received by the receiving jig d. The heater c is mounted and held on the holder e, and the heater c is carried between the lamp body a and the lamp cover b. Then, as shown in FIG. 6C, a preheating step of heating the flange portion a1 of the lamp body a mounted on the receiving jig d and the leg b1 of the lamp cover b held by the holder e is performed. Next, the space between the receiving jig d and the holder e is widened, the heater c for heating is carried out from the stage, and the receiving jig d and the holder e are brought close to each other as shown in FIG. A vibration welding process is performed in which the leg part b1 of the lamp cover b is pressed against the flange part a1 of the body a, and the contact part is vibrated through the lamp cover b to weld the corresponding part. Finally, as shown in FIG. 6E, the space between the receiving jig d and the holder e is widened, the product is taken out from the welding stage, and the operations (a) to (e) are repeated.

  Thus, in the welding stage for performing the vibration welding process, since both the preheating process and the vibration welding process are performed, the cycle time for welding the lamp body a and the lamp cover b is inevitably long.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a vibration welding method and apparatus capable of shortening the cycle time.

In order to achieve the above object, in the vibration welding method according to the present invention,
A heat treatment stage equipped with a heater as a heating means and a welding treatment stage equipped with a work holder are provided adjacent to each other,
A preheating step of heating the first workpiece, which is mounted on a receiving jig constituting the workpiece transfer mechanism and transferred to the heat treatment stage, by the heater, and the first workpiece subjected to the heat processing is mounted on the receiving jig. Then, it is conveyed to the welding processing stage, abuts on the second workpiece held by the workpiece holder, and a vibration is applied to the abutting portion between the first and second workpieces via the second workpiece. A vibration welding method comprising: a welding step of vibration welding the contact portion,
A pair of the receiving jigs is used, the receiving jigs are linked and moved between the two stages, and the preheating step and the welding step are performed simultaneously.

  In the vibration welding method according to the present invention, in the welding process, a product is taken out from the receiving jig in the welding processing stage, and new first and second workpieces are received in the receiving jig, It is desirable to mount and hold each work holder.

In order to achieve the above object, in the vibration welding apparatus according to the present invention,
A heating processing stage for heating a first workpiece that has been transported by being mounted on a receiving jig that constitutes a workpiece transport mechanism, including a heater that is a heating means;
A work holding tool for holding a second work is provided, and the first work that has been heated and mounted on the receiving jig and conveyed is brought into contact with the second work held by the work holding tool. A vibration welding apparatus provided adjacent to a welding processing stage that vibrates the first and second workpiece contact portions via the second workpiece and vibrates the corresponding contact portions. ,
A pair of the receiving jigs are provided, and the receiving jigs move in cooperation between the two stages so that the preheating step and the welding step are performed simultaneously.
(Operation) The first workpiece mounted on the receiving jig constituting the workpiece conveyance mechanism and conveyed to the welding processing stage is heated and softened in the preliminary heating step (heating treatment stage) which is the previous step. In the vibration welding process, when reaching the melting temperature in such a short time and the first workpiece is not pre-heated, the powder and yarn burrs are generated when the first and second workpiece contact portions are vibration welded. There is little occurrence of.

  Further, in the welding process stage, the heat treatment is performed during the process of applying vibration to the contact portion between the first and second workpieces and vibrating and welding the corresponding contact portion via the second workpiece held by the workpiece holder. On the stage, a heater as heating means approaches the first work mounted on the receiving jig, and a preheating process for the first work is performed.

  Then, in the welding process stage, the product in which the first and second workpiece contact portions are welded is taken out from the receiving jig, and new first and second workpieces are respectively placed on the receiving jig and the holding tool. When mounted and held, the receiving jig on which a new first workpiece is mounted moves from the welding processing stage to the heat processing stage. During this time, in the heat processing stage, the heater is moved from the heat-treated first work. The receiving jig on which the first workpiece that is separated and heat-treated is mounted moves from the heat treatment stage to the welding treatment stage. That is, the movement of the receiving jig carrying the heat-treated first workpiece from the heat treatment stage to the welding treatment stage, and the welding jig mounting the new first workpiece from the welding treatment stage to the heat treatment stage. Are moved simultaneously.

  In addition, the cycle time for manufacturing one product in which the first and second workpieces are welded and integrated is as follows. In the conventional method, the first and second workpieces are brought into the welding processing stage, and the product from the stage. The time required to open and close the stage door, the time required for the heat treatment process (heat treatment by the heater, the reciprocating movement of the heater, etc.) and the vibration welding process (receiving jig) The time required for elevating, vibrating and holding pressure) was added, for example, 40 seconds.

  On the other hand, in the method and apparatus according to the present invention, the pair of receiving jigs constituting the workpiece transfer mechanism are moved in cooperation between the heat treatment stage and the welding treatment stage, and the preheating step and the vibration welding step are performed simultaneously. Therefore, the cycle time is the time required for the longer one of these two steps (preheating step), the first and second workpieces are carried into the welding processing stage, and the product from the welding processing stage. Time that is mainly manually carried out, such as unloading, and time required to open and close the door of the stage, plus time required to transport the first workpiece (movement of the receiving jig) between the stages, Become. However, the time required for the conveyance of the first workpiece between the stages (movement of the receiving jig) is very short, and further, the first and second workpieces are carried into the welding processing stage, and from the welding processing stage. By performing manual operations such as unloading of the product in a substantially short vibration welding process, the cycle time of 40 seconds in the conventional method is reduced to 10 seconds, for example, 30 seconds.

Further, in the vibration welding apparatus according to the present invention, as described in claim 4,
The welding process stage and the heat treatment stage are arranged to face each other with a predetermined distance apart in the vertical direction,
Between the two stages, the pair of receiving jigs are fixed and integrated back to back with respect to a horizontal rotation axis passing between the two stages, and the work transport mechanism is configured to be vertically rotatable around the horizontal rotation axis. Jig unit is arranged,
The jig unit rotates the first workpiece preliminarily heated on the heat treatment stage by rotating intermittently about the horizontal rotation axis every 180 degrees so that each receiving jig faces the both stages. The first workpiece newly mounted on the processing stage in the processing stage can be configured to be simultaneously transferred to the heat processing stage.
(Operation) The workpiece transfer mechanism is configured such that a jig unit in which a pair of receiving jigs are integrated back to back is 180 degrees vertically around a horizontal rotation axis between a welding process stage and a heat treatment stage separated by a predetermined distance in the vertical direction. With a compact structure that rotates intermittently every time, the installation space in the horizontal direction of the vibration welding device is small, and the rotation radius of the jig unit is small, so the first workpiece can be transported to the specified stage in a short time. can do.

Further, in the vibration welding apparatus according to the present invention, as described in claim 5,
The welding treatment stage and the heat treatment stage are arranged to face each other with a predetermined distance in the left-right direction,
Below the two stages, the pair of receiving jigs are fixed and integrated horizontally with the vertical rotation axis passing between the two stages sandwiched between the two stages so that the respective work mounting surfaces face upward. A jig unit that constitutes the workpiece transfer mechanism, which can be rotated horizontally around the rotation axis, is arranged,
The jig unit rotates the first workpiece preliminarily heated on the heat treatment stage by rotating intermittently about the vertical rotation axis every 180 degrees so that each receiving jig faces the both stages. The first workpiece newly mounted on the processing stage in the processing stage can be configured to be simultaneously transferred to the heat processing stage.
(Operation) The workpiece transfer mechanism integrates a pair of receiving jigs horizontally in the left-right direction with a vertical rotation axis passing between both stages below the welding process stage and the heat treatment stage separated by a predetermined distance in the left-right direction. The jig unit rotates intermittently about the vertical rotation axis every 180 degrees. Compared to claim 4, the jig unit has a larger rotation radius, but the installation space in the vertical direction of the vibration welding apparatus is compact. It becomes.

  As is clear from the above description, according to the vibration welding method and vibration welding apparatus according to the present invention, the cycle time can be greatly shortened, and the product in which the first and second workpieces are welded and integrated is mass-produced. Is optimal.

  According to the fourth aspect, the installation space in the horizontal direction of the vibration welding apparatus can be small, and the cycle time can be surely shortened.

  According to the fifth aspect, compared with the fourth aspect, the installation space in the vertical direction of the vibration welding apparatus can be reduced.

It is a schematic diagram of the whole vibration welding apparatus concerning a 1st embodiment of the present invention. It is an expanded sectional view of the welding part between the flange part of a lamp body, and the seal leg of a front lens. It is a figure which shows the vibration welding process which vibrates and welds a lamp body and a front lens using the vibration welding apparatus. It is a schematic diagram of the whole vibration welding apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the outline | summary of the conventional vibration welding method, (a) is sectional drawing which shows a preheating process, (b) is sectional drawing which shows a vibration welding process. It is a figure which shows the conventional vibration welding process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a vibration welding apparatus 10 according to a first embodiment of the present invention. The apparatus 10 includes an ABS-based resin lamp body 2 that is an automotive lamp component, an acrylic resin front lens 4, and the like. Is a device for vibration welding.

  The vibration welding apparatus 10 generates frictional heat at the site to be welded between the workpieces using electromagnetic vibration, melts the material at the site to be welded by this frictional heat, and integrates and joins it. A body receiving jig 22 for mounting a certain lamp body 2, a lens holder 14 for holding a front lens 4 as a second workpiece, and a vibration generator 12 for electromagnetically vibrating the lens holder 14. . Reference numeral 22a indicates a workpiece placement surface.

  In the vibration generator 12, a vibrating body 17 is suspended on the lower surface of a support 15 via an elastic body 16 so as to be movable in the left-right direction, and electromagnets 18 are arranged oppositely on both left and right sides of the support 15. The lens holder 14 is fixed to the frame. Then, by alternately supplying current to the left and right electromagnets 18, the vibrating bodies 17 are alternately attracted in the left-right direction to generate electromagnetic vibrations (for example, frequency 240 Hz), and the lens holder 14 is vibrated together with the vibrating bodies 17. Then, as shown in FIG. 2, vibration is generated in the contact portion (pressure contact portion) between the seal leg 5 of the front lens 4 and the flange portion 3 of the lamp body 2 through the front lens 4 held by the lens holder 14. Acts, and the corresponding contact part is melted and adhered by frictional heat.

  The vibration welding apparatus 10 is provided with a lower heat treatment stage S1 for heating the lamp body 2 and an upper welding process stage S2 for vibration welding the front lens 4 to the lamp body 2.

  The heat treatment stage S1 is provided with a heater 32 that is a heating means that can be moved up and down by a lifting mechanism 30 such as a hydraulic cylinder. The stage S1 is mounted on a body receiving jig 22 that constitutes a workpiece transfer mechanism 20 described later. Then, a preheating process for heating the lamp body 2 that has been conveyed is performed. On the other hand, a lens holder 14 capable of holding the front lens 4 is provided in the welding processing stage S2, and the stage S2 has been preheated in the heat processing stage S1 and then mounted on the receiving jig 22 and conveyed. The lamp body 2 is held in a form in which the lamp body 2 is pressed against the front lens 4 held by the lens holder 14 in the vertical direction, and vibration is applied to the pressure contact portion between the both 4 and 2 via the front lens 4 to vibrate the pressure contact portion. A vibration welding process is performed for welding.

  Since the surface of the flange portion 3 of the lamp body 2 mounted on the receiving jig 22 and transported to the welding processing stage S2 is heated and softened in the heat processing stage S1, the flange portion 3 is used in the vibration welding process. The contact part (pressure contact part) between the seal legs 5 reaches the melting temperature in such a short time, and the generation of the powder burrs 7 and the thread burrs 8 is less than that of the vibration welding method without preheating.

  In addition, between the welding processing stage S2 and the heating processing stage S1 arranged to face each other at a predetermined distance in the vertical direction, with respect to the horizontal rotation axis Lx arranged in the horizontal direction through both stages S1 and S2, A pair of body receiving jigs 22 are fixed and integrated back to back, and a work transfer mechanism 20 configured by a jig unit U that can be rotated vertically around the horizontal rotation axis Lx is disposed.

  The workpiece transfer mechanism 20 (jig unit U) is configured to be movable up and down by an elevating mechanism 26 such as a hydraulic cylinder, and the lamp body 2 mounted on the body receiving jig 22 is attached to the welding processing stage S2. The lifting mechanism 26 is used to hold the front lens 4 held in the lens holder 14 so as to be in pressure contact.

  The work transfer mechanism 20 intermittently rotates the jig unit U about the horizontal rotation axis Lx every 180 degrees so that the receiving jigs 22 and 22 are linked and face each other simultaneously with the stages S1 and S2. The lamp body 2 preliminarily heated in the heat treatment stage S1 is transported simultaneously to the welding process stage S2, and the lamp body 2 newly mounted in the welding process stage S2 is simultaneously transported to the heat treatment stage S1.

  Therefore, the preliminary heating process of the lamp body 2 in the heat treatment stage S1 and the vibration welding process between the lamp body 2 and the front lens 4 in the welding process stage S2 can be performed simultaneously, and the installation space of the apparatus 10 can be saved.

  Further, electromagnetic vibration (for example, frequency 240 Hz) generated by the vibration generator 12 is transmitted to the contact portion (pressure contact portion) between the flange portion 3 of the lamp body 2 and the seal leg 5 of the front lens 4, and the welding surface. The corresponding contact portion is welded by the frictional heat generated in The larger the amplitude of the vibration transmitted to the contact portion, the greater the frictional heat generated on the weld surface and the greater the rate of increase of the weld surface temperature, so that the weld surface can be welded in a short time. However, if the amplitude is too large, the flange 3 side of the lamp body 2 is scraped before the seal leg 5 of the front lens 4 reaches the softening temperature, and thread burr occurs. Therefore, initially, it is most desirable to vibrate with a small amplitude so that the flange portion 3 side is not scraped, and to vibrate with a large amplitude when the seal leg 5 side is softened. Then, the lamp body 2 and the front lens 4 could be welded without generating any thread burr 8 by first applying a vibration with an amplitude of 0.5 mm and then applying a vibration with an amplitude of 1.2 mm.

  Next, with reference to FIG. 3, the process of vibration welding the lamp body 2 and the front lens 5 will be described.

  First, as shown in FIG. 3 (a), in the welding processing stage S2, the operator mounts the lamp body 2 and the front lens 4 on the receiving jig 22A and the lens holder 14 that are largely separated in the vertical direction. Hold. On the other hand, in the heat treatment stage S1, the heater 32 is held close to the lamp body 2 mounted on the receiving jig 22B, and a preheating step for heating the surface of the flange portion 4 of the lamp body 2 is performed.

  Next, as shown in FIG. 3B, in the welding process stage S2, the door 28 is closed, the work transport mechanism 20 is driven (the jig unit U is rotated by 180 degrees), and the receiving jig 22A is operated in the welding stage S2. The lamp body 2 mounted on is transported to the heat treatment stage S1. On the other hand, in the preheating stage S1, when the heater 32 is separated from the lamp body 2, the heat treatment process is completed, the work transport mechanism 20 is driven (the jig unit U is rotated 180 degrees), and the preheated lamp body is driven. 2 is transferred to the welding stage S2 together with the receiving jig 22B.

  Next, as shown in FIG. 3C, in the welding processing stage S2, the entire work transport mechanism 20 (the jig unit U) is raised, and the lamp body 2 and the front lens 4 are in contact (pressure contact). The vibration generator 12 is driven and vibration is transmitted to the contact portion (pressure contact portion) between the front lens 4 and the lamp body 2, and the contact portion between the lamp body 2 and the front lens 4 is moved. Melted and bonded. On the other hand, in the heat treatment stage S1, the preliminary heating process for heating the lamp body 2 is started while the heater 32 is raised and held in the form close to the lamp body 2.

  Next, as shown in FIG. 3D, in the welding process stage S2, the door 28 is opened, and the entire work transport mechanism 20 (the jig unit U) is lowered to the original position and mounted on the receiving jig 22B. The upper part of the lamp that is the product is opened, and the operator takes out the lamp that is the product from the receiving jig 22B. On the other hand, in the heat treatment stage S1, the heater 32 is held close to the lamp body 2, and the preliminary heating process for heating the lamp body 2 mounted on the receiving jig 22A is continued.

  Then, the jig unit U shifts to the form shown in FIG. 3A while the receiving jigs 22B and 22A are directed to the welding process stage S1 and the heat treatment stage S1, respectively, and the operator receives the treatment. A new lamp body 2 and front lens 4 are mounted and held on the fixture 22B and the lens holder 14, respectively. In this manner, the vibration welding process shown in FIGS. 3A to 3B is repeated.

  FIG. 4 shows a vibration welding apparatus according to the second embodiment of the present invention.

  In the vibration welding apparatus 10A according to the second embodiment, the heat treatment stage S1 provided with the heater 32 and the welding treatment stage S2 provided with the lens holder 14 holding the front lens 4 are adjacent to each other on the left and right. A pair of treatments in the left-right direction horizontally with the vertical rotation axis Ly disposed in the vertical direction passing between the two stages S1 and S2 below and between the stages S1 and S2. The jigs 22 and 22 are fixed and integrated with their workpiece mounting surfaces 22a and 22a facing upward, and a jig unit U1 that constitutes a workpiece transfer mechanism 20A that can rotate laterally around the vertical rotation axis Ly is disposed. Yes.

  The jig unit U1 is a lamp that is preheated in the heat treatment stage S1 by rotating intermittently about the vertical rotation axis Ly every 180 degrees so that the receiving jigs 22 and 22 face the stages S1 and S2, respectively. The body 2 is configured to be welded to the welding process stage S2, and the lamp, which is a product integrated in the welding process stage S2, is taken out, and the newly mounted front lens 4 is simultaneously transported to the heating process stage S1. . The jig unit U1 is configured to be movable in the vertical direction by an elevating mechanism 26 such as a hydraulic cylinder.

  The other configuration is the same as that of the vibration welding apparatus 10 according to the first embodiment described above, and thus a duplicate description thereof is omitted.

  The workpiece transfer mechanism 20A has a pair of receiving jigs 22 and 22 sandwiching a vertical rotation axis Ly passing between the stages S1 and S2 below the welding processing stage S1 and the heating processing stage S2 separated by a predetermined distance in the left-right direction. Compared with the vibration welding apparatus 10 according to the first embodiment, the jig unit U1 in which the right and left sides are horizontally integrated intermittently rotates around the vertical rotation axis Ly every 180 degrees in the lateral direction. The unit U1 has a large turning radius and requires a horizontal installation space for the apparatus 10A. However, since the rotational load around the vertical rotation axis Ly of the jig unit U1 is constant in the circumferential direction, each of the lamp bodies 2 is predetermined. Can be smoothly transported to the stages S1 and S2.

2 Lamp body 3 as a first work 3 Flange part 4 of the lamp body Front lens 5 as a second work Seal legs 10 and 10A of a front lens Vibration welding device 12 Vibration generator 14 Lens holder 20 and 20A Work transport mechanism 22 Body receiving jig 32 Heater S1 as heating means Heating stage S2 Welding stage U, U1 Jig unit Lx Horizontal rotation axis Ly Vertical rotation axis

Claims (5)

A heat treatment stage equipped with a heater as a heating means and a welding treatment stage equipped with a work holder are provided adjacent to each other,
A preheating step of heating the first workpiece that is mounted on a workpiece receiving jig constituting the workpiece conveying mechanism and conveyed to the heat treatment stage by the heater, and the first workpiece subjected to the heat treatment is used as the receiving jig. Mounted, conveyed to the welding processing stage, brought into contact with the second workpiece held by the holder, and applied to the first and second workpiece contact portions via the second workpiece. A vibration welding method comprising: a welding step of vibration welding the contact portion;
A vibration welding method, wherein a pair of the receiving jigs are used, the receiving jigs are linked and moved between the two stages, and the preliminary heating step and the welding step are performed simultaneously.   In the welding process, the product is taken out from the workpiece receiving jig in the welding processing stage, and new first and second workpieces are mounted and held on the receiving jig and the workpiece holder, respectively. The vibration welding method according to claim 1, wherein: A heater that is a heating means, a heat treatment stage that heats the first work that has been mounted on a receiving jig that constitutes the work transfer mechanism, and a work holder that holds the second work, The first workpiece that has been heated and mounted on the receiving jig is brought into contact with the second workpiece held by the workpiece holder, and the first and second workpieces are brought into contact with each other via the second workpiece. A vibration welding apparatus provided adjacent to a welding processing stage that vibrates and welds the corresponding contact portion by applying vibration to the contact portion between the workpieces,
A vibration welding characterized in that a pair of the receiving jigs are provided, and the receiving jigs move in cooperation between the two stages so that the preheating step and the welding step are performed simultaneously. apparatus. The welding process stage and the heat treatment stage are arranged to face each other with a predetermined distance apart in the vertical direction,
Between the two stages, the pair of receiving jigs are fixed and integrated back to back with respect to a horizontal rotation axis passing between the two stages, and the work transport mechanism is configured to be vertically rotatable around the horizontal rotation axis. Jig unit is arranged,
The jig unit rotates the first workpiece preliminarily heated on the heat treatment stage by rotating intermittently about the horizontal rotation axis every 180 degrees so that each receiving jig faces the both stages. The vibration welding apparatus according to claim 3, wherein the first workpiece newly mounted on the processing stage is simultaneously transferred to the heat processing stage. The welding treatment stage and the heat treatment stage are arranged to face each other with a predetermined distance in the left-right direction,
Below the two stages, the pair of receiving jigs are fixed and integrated horizontally with the vertical rotation axis passing between the two stages sandwiched between the two stages so that the respective work mounting surfaces face upward. A jig unit that constitutes the workpiece transfer mechanism, which can be rotated horizontally around the rotation axis, is arranged,
The jig unit rotates the first workpiece preliminarily heated on the heat treatment stage by rotating intermittently about the vertical rotation axis every 180 degrees so that each receiving jig faces the both stages. The vibration welding apparatus according to claim 3, wherein the first workpiece newly mounted on the processing stage is simultaneously transferred to the heat processing stage.

Images