JP6090789B2 - Part identification method and welding method in welding - Google Patents

Description

  The present invention relates to a component identification method and a welding method in welding for identifying correctness of a component to be welded during temporary welding.

  There are two or more types of specifications for one vehicle class with work machines due to differences in regulations in the shipping destination region, etc., and parts with similar shapes (similar parts) for each specification, such as structural parts such as frames ) Is often used. Here, the specifications are often assembled on the same production line, making it difficult to manage in production.

  Conventionally, identification is performed by marking or engraving the part number for each part. However, for the marking of the part number, it is difficult to identify the operator due to the large number of target part numbers. Since the part number stamp is of a size that does not affect the appearance of the vehicle, it is difficult to discriminate from a distance, and the identification efficiency deteriorates when there are a large number of target parts. In either case, there is a risk that the operator may perform wrong marking or stamping.

  On the other hand, there are technologies for identifying similar parts using an electronic tag, a barcode, or the like, but these technologies each require introduction costs.

  Furthermore, as an identification means when assembling different types of panel parts of the same shape into a panel of the same shape, there is a technology in which protrusions or holes for identification are provided on the panel parts and these are detected and detected by a contact-sensitive detector. Although disclosed (see Patent Document 1), this technology also requires introduction costs.

  For this reason, it is an inexpensive identification that makes it easy for an operator to visually identify that the part selected from a plurality of similar parts is correct and to confirm that it is the correct combination of parts. A method is required from the manufacturing side.

  In addition, as a marking method for sheet metal parts related to the welding method, a plurality of mark holes indicating welding positions at the time of welding processing are processed into the base metal welding locations, and parts positioned on the base material by these mark holes are processed. A technique for welding is disclosed (see Patent Document 2). Further, as a bucket structure for a loader, a positioning tab and an engagement edge for automatically positioning the part are provided on a structural part, which can be handled by a robot and can be temporarily welded. Such a technique is disclosed (see Patent Document 3).

  In the positioning technique related to such a welding method, if a part is positioned at a predetermined place, even if it is a similar erroneous part, it may be welded without being identified.

  Furthermore, in order to support the working device 4 composed of a boom 4bm, a stick 4st, a bucket 4bk, and the like, the upper swinging body 3 that can swing with respect to the lower traveling body 2 of the work machine 1 shown in FIG. The main frame 5 shown in FIG. 5 is provided. When such a main frame 5 is assembled by welding a plurality of plate parts, for example, a plate is used to select the corresponding part from a plurality of similar parts. The corresponding part is identified using the notch 6 processed into the part 5a, the notch 7 processed into the plate part 5b, the protrusion 8 or the hole processed into the plate part 5c.

Japanese Unexamined Patent Publication No. 60-50082 JP-A-11-28516 JP 2000-129712 A

  The identification method using these notches 6, 7, protrusions 8 or holes may not be applied to places that affect the appearance or places that affect the strength, and is surrounded by plate parts. There are some places that cannot be applied due to the layout.

  The present invention has been made in view of the above points, and enables a worker who is trying to weld one part to the other part to easily identify the correctness of the one part easily with a short visual inspection. It is an object of the present invention to provide an inexpensive component identification method and a welding method that enables the above identification and can be applied to locations that affect the appearance and strength.

According to the first aspect of the present invention, in the welding in which one part is temporarily welded to the other part, the one part and the other part are mutually connected by a notch-groove-shaped recess for part identification provided at a temporary welding scheduled location of the one part. This is a part identification method in welding for identifying the correctness of selection of one part from a visible gap formed at a distance .

  According to a second aspect of the present invention, in the component identification method for welding according to the first aspect, a concave portion for identifying a component provided in one component and a non-welded portion of the other component corresponding to the concave portion for identifying the component This is a part identification method in welding for identifying whether a combination of parts is correct or not by using a concave part for preventing wrong assembly provided in.

According to a third aspect of the present invention, in the welding method in which one part is temporarily welded to the other part and then main welding is performed, a notch groove-shaped concave part for identifying the part is provided at a temporary welding scheduled position of the one part, and the one part The part provided with the recess is temporarily welded to the other part to fill the gap between the visible part where the one part and the other part are formed apart from each other , and this provisionally welded part ensures the penetration of the root part. On the other hand, this is a welding method in which one part is fully welded to the other part.

According to the first aspect of the present invention, the correctness of the selection of one part is determined from the visible gap in which the one part and the other part are formed away from each other by the notch groove- shaped recess provided at the temporary welding scheduled location of the one part. Therefore, it is possible for the operator involved in welding to easily and accurately perform this identification with a short visual inspection, and it is possible to prevent welding of one part erroneously selected from a plurality of similar parts. A part identification method can be provided.

  According to the invention described in claim 2, since the concave part for preventing misassembly is provided in the other part of the other part with respect to the one part having the concave part for identifying the part, the correctness of the combination of the parts is identified by these concave parts. It is also possible to obtain a higher effect in preventing an error in component selection.

According to the invention described in claim 3, if one of the parts is erroneously selected from a plurality of similar parts by providing a notch-groove-shaped concave part for identifying the part at a temporary welding scheduled part of the one part. For example, it becomes possible for the operator to easily identify accurately by short-time visual inspection from the visible gap formed by separating the one part and the other part from each other by the recess, and by visual inspection of the operator before temporary welding. A welding method that can prevent temporary welding of one of the misselected parts, and that the recess is surely filled by melting the root part of the main welding when the main welding is finally completed, so that the recess does not affect the appearance or strength. Can provide.

It is a perspective view which shows one Embodiment of the components identification method and welding method in the welding which concerns on this invention, (a) is the state which aligned the one component which has a recessed part with the other component, (b) is temporary welding (C) is a state where the main welding is performed. It is a perspective view which shows the installation location in the main frame of the recessed part in a identification method and a welding method same as the above. It is a perspective view which shows the modification of the recessed part in a identification method and a welding method same as the above. It is a side view of a working machine. It is a perspective view of the main frame which has the conventional component identification means.

  Hereinafter, the present invention will be described in detail with reference to the working machine shown in FIG. 4 on the basis of the embodiment shown in FIGS. 1 and 2 and the modification shown in FIG.

  FIG. 2 shows a main frame 5 as a welded structure that supports the working device 4 in the upper turning body 3 that can turn with respect to the lower traveling body 2 of the work machine 1 shown in FIG. When welding (vertical plate part) 11 to the other part (bottom plate part) 12 and assembling, temporary welding is always performed before main welding in order to reduce welding distortion and maintain the correct dimensions. A notch groove-like recess 13 that functions as an identification mark for the one-part 11 is provided at a place where temporary welding is to be performed.

  That is, as shown in FIG. 1A, a concave part 13 for identifying one part is provided at a temporary welding scheduled place where the one part 11 is temporarily welded to the other part 12.

  Specifically, a concave portion 13 having a depth of about 2 mm is provided at a location where temporary welding is scheduled at the time of assembly to serve as an identification means. Any place where two parts having a leg length of 6 mm or more are welded can be applied between various parts regardless of the kind of the parts.

Many identification patterns corresponding to the model are prepared by changing the length, number, etc. of the recesses 13 .

  Then, the operator visually checks the gap formed between the one component 11 and the other component 12 by the component identifying recess 13 provided at the temporary welding position of the one component 11 to select whether the one component 11 is selected correctly. And confirming that the one part 11 is an appropriate part (combination of structural parts), and then, as shown in FIG. Temporarily weld to the other part 12 and fill the gap of the recess 13 with the temporarily welded portion 14 and reduce the welding distortion and maintain the correct dimensions when the one part 11 is fully welded to the other part 12 and assembled. To do.

  Further, as shown in FIG. 1 (c), the welding is performed by welding the entire abutting edge of the one part 11 to the other part 12 while ensuring the penetration of the root portion by the temporarily welded portion 14. The gap 15 in the recess 13 is completely filled with the portion 15.

  Next, the effect of the embodiment shown in FIG. 1 will be described.

  The preliminary welding scheduled location is the location that the worker involved in welding always looks at when first starting the welding operation, and by providing a recessed portion 13 that identifies the temporary welding scheduled location, an oversight of the operator involved in welding is overlooked. Therefore, the operator can easily and reliably confirm the identification.

  That is, since the operator 13 involved in welding recognizes the correctness / incorrectness of the one-part 11 by the recess 13 provided in the temporary welding scheduled location of the one-part 11, the operator can easily check the correctness / incorrectness of the one-part 11 with a short visual inspection. It is possible to accurately identify, and prevent temporary welding of a part erroneously selected from a plurality of similar parts.

  In addition, the gap formed by the concave portion 13 for identifying the part is filled with the temporarily welded portion 14, and the root portion is melted by the main welded portion 15. Therefore, the concave portion 13 is completely visible from the outside after the main welding. Will not affect the appearance of the vehicle.

  Furthermore, by providing a recess 13 with a depth of about 2 mm at the part 11 to be temporarily welded, visual confirmation of the operator can be ensured, and the gap of the recess 13 can be filled by temporary welding. Since the root portion can be melted and the strength can be maintained, there is no problem in terms of strength even if the concave portion 13 for component identification is provided.

  By simply changing the presence / absence, length, and number of the recesses 13, it is possible to identify a plurality of components corresponding to a plurality of models. In addition to identifying individual parts, unifying identification shapes such as length and number of parts among a plurality of parts can reduce the risk of mistakes when combining parts, that is, the risk of misassembly.

  Identification can be made at low cost without using an electronic tag or barcode.

  As described above, in order to prevent the temporary welding of the one part 11 erroneously selected before the temporary welding, the concave portion 13 is provided at the temporary welding scheduled portion of the part end of the one part 11 so that the operator can visually check. Thus, it is possible to easily and surely identify the correctness of the one-part 11 and to provide the concave portion 13 at the temporary welding scheduled location. Since it is reliably filled by melting, it is possible to provide a welding method that does not affect strength or appearance.

  Next, FIG. 3 shows a modification of FIG. 1 (a), in which one component 11 is provided with a component identifying recess 13 and a non-welded portion (side edge) of the other component 12 corresponding to this recess 13. An identification pattern for identifying whether the combination of components is correct or not is formed by the recess 16 for preventing misassembly provided in the shape of a notch groove in the part).

  In this manner, the other component 12 to which the one component 11 is welded is also provided with the concave portion 16 for preventing misassembly corresponding to the concave portion 13 for identifying the component, that is, the concave portion 13 corresponding to each of the two components to be welded. When 16 is provided and identification is performed by a combination of these recesses 13 and 16, it is possible to identify whether the combination of two adjacent parts is correct, and a higher effect in preventing an erroneous part selection, that is, In addition to the erroneous selection prevention effect, an erroneous assembly prevention effect can be obtained.

  The embodiment shown in FIGS. 1 to 3 is applied to the main frame 5 in the upper swing body 3 of the work machine 1 shown in FIG. 4, but the work device 4 of the work machine 1 is used. The present invention can also be applied when assembling a welded structure such as the boom 4bm and the stick 4st.

  Furthermore, the present invention can be applied not only to the work machine 1 but also to the assembly of welded structures in other technical fields.

  The present invention has industrial applicability to a business operator who performs a welding method.

11 One-part parts
12 Other parts
13 Concave for identifying parts
14 Temporarily welded parts
15 welded parts
16 Recessed part for preventing misassembly

Claims (3)

In welding where one part is temporarily welded to the other part,
On the other hand, the correctness of selection of one part is identified from a visible gap formed by separating the one part and the other part from each other by a notched groove- shaped recess for part identification provided at a part to be temporarily welded. A method for identifying parts in welding. Identify the correctness of the combination of parts by using the concave part for identifying the part provided on one part and the concave part for preventing misassembly provided at the non-welded part of the other part corresponding to the concave part for identifying part. The method of identifying a part in welding according to claim 1. In a welding method in which main welding is performed after one part is temporarily welded to the other part,
On the other hand, a notch groove-shaped concave part for part identification is provided at the part to be temporarily welded,
The part where the concave part of one part is provided is temporarily welded to the other part, and the gap between the visible concave part formed by separating the one part and the other part from each other is filled,
A welding method characterized in that one part is finally welded to the other part while securing the root part penetration by the temporarily welded part.

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