CN214185139U

CN214185139U - Large-scale core box clamp pin structure

Info

Publication number: CN214185139U
Application number: CN202022924834.5U
Authority: CN
Inventors: 乔琛; 董腾; 王元元
Original assignee: Asimco International Casting Co ltd Shanxi
Current assignee: Asimco International Casting Co ltd Shanxi; Asimco International Casting Shanxi Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-14
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a casting core box technical field specifically is a large-scale core box split pin structure, including upper core box, lower core box, the medial surface of upper core box is equipped with the split pin, and lower core box inside surface relevant position is equipped with the guide pin bushing that is used for inserting the split pin, the split pin be round platform form, six symmetrical arris faces that set up along the vertical direction are cut out to the periphery of split pin, are equipped with two navigation keys around the guide pin bushing, the medial surface that two navigation keys are relative is parallel to, and its distance equals with the distance of two relative arris faces of split pin; the inner side surfaces opposite to the two positioning keys are used for being attached to two opposite edge surfaces of the mold closing pin, so that the upper core box and the lower core box are positioned. The utility model discloses in, two face contact location are used to the fitting pin, and positioning gap is more even, and the compound die precision is higher.

Description

Large-scale core box clamp pin structure

Technical Field

The utility model relates to a casting core box technical field specifically is a large-scale core box compound die round pin structure.

Background

In the casting production flow, in the core making production, the die assembly of an upper core box and a lower core box is a very critical link, and a die assembly pin is an indispensable component for ensuring the die assembly precision of the core box, so that the positioning effect of the die assembly pin is poor, the die assembly deviation can be caused, the die cavity can be damaged when the die is staggered and the joint surface of the sand core is staggered seriously, and the normal production cannot be realized. No matter whether the staggered mould is serious or not, the sand core can be staggered, the cleaning work of the part needs to be increased, the labor intensity is increased, the production efficiency is influenced, the size deviation of a casting and the defect of processing black skin can be caused once the sand core is circulated out and poured into a cavity, and the poor quality effect is generated. The existing core box mold clamping pin structure comprises an upper core box and a lower core box, wherein a mold clamping pin is arranged on the upper core box, a guide pin sleeve is arranged at the corresponding position of the lower core box, as shown in fig. 2, the mold clamping pin is in a circular table shape with a diameter being small at the top and big at the bottom, and the mold clamping pin is inserted into the guide pin sleeve to realize the positioning of the upper core box and the lower core box. The mold clamping pins are ¢ 25.4.4 mm and ¢ 40mm, and are matched with a core box positioning and guide pin sleeve, wherein ¢ 40mm is mainly applied to a large-sized core box (the external dimension is 1.6-2.1 m, and the weight is 6-8.9 tons), and the mold clamping pins are found to be worn quickly in the core production process, so that the problem of dislocation of the sand cores occurs when the mold clamping pins are not replaced in time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the wearing and tearing that current upper and lower core box split die round pin structural design unreasonable brought fast, the inaccurate scheduling problem that causes product quality in location provides a large-scale core box split die round pin structure.

The technical scheme of the utility model is that, a large-scale core box fitting pin structure, including upper core box, lower core box, the medial surface of upper core box is equipped with the fitting pin, and lower core box inside surface relevant position is equipped with the guide pin bushing that is used for inserting the fitting pin, the fitting pin be round platform form, six symmetrical arris faces that set up along the vertical direction are cut out to the periphery of fitting pin, are equipped with two navigation keys around the guide pin bushing, the medial surface that two navigation keys are relative is parallel to, and its distance equals with the distance of two relative arris faces of fitting pin; the inner side surfaces opposite to the two positioning keys are used for being attached to two opposite edge surfaces of the mold closing pin, so that the upper core box and the lower core box are positioned.

One end of the joint pin is provided with a supporting platform, the upper core box is provided with a jack, and the joint pin is inserted into the jack through the supporting platform.

The width of the bottom of each edge surface is 23mm, and the distance between the two opposite edge surfaces is 55 mm.

Compared with the prior art, the utility model discloses used modified fitting pin and direction guide pin cover, core box precision positioning about the cooperation through faceted pebble and navigation key realizes, ensures that closing in the casting process is stable, has guaranteed product quality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a conventional mold clamping pin structure;

FIG. 3 is a schematic view of a prior art guide pin bushing;

FIG. 4 is a schematic diagram of a locking pin structure according to an embodiment of the present invention;

fig. 5 is a schematic view of the guide pin sleeve structure in the embodiment of the present invention.

In the figure: 1 is the core box, 2 is the fitting pin, 3 is the guide pin cover, 4 is down the core box, 5 is the faceted pebble, 6 is the brace table, 7 is the navigation key.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As illustrated in fig. 1, the utility model provides a large-scale core box split pin structure, including upper core box 1, lower core box 4, the medial surface of upper core box 1 is equipped with

split pin

2, and 4 medial surface relevant positions of lower core box are equipped with direction cotter way 3, split pin 2 be the round platform form, as illustrated in fig. 4, the flank of split pin 2 is cut out six symmetrical faceted pebbles 5 along vertical direction setting, and its cross section is the regular hexagon after the contained angle circular arc transition, as illustrated in fig. 5, is equipped with two navigation keys 7 around direction cotter way 3, the medial surface that navigation key 7 is relative is parallel, the medial surface distance that navigation key 7 is relative equals with the distance of two relative facets of split pin 2, and split pin 2 inserts in the direction cotter way 3, and the facet of split pin and the medial surface laminating of navigation key, realize upper core box, lower core box location.

Obviously, in the embodiment, the mold clamping pin with six edge surfaces is positioned by two surface contact, so that the positioning gap is more uniform, and the mold clamping precision is higher. After the positioning mode is changed into pin and key positioning, the positioning key is more firmly and stably installed, and compared with the prior art, the pin sleeve can only be fixed by a pressing plate on one side, and the assembling precision is higher.

Specifically, in this embodiment, the width of the edge surface is 23mm, and the distance between the two symmetrical edge surfaces is 55 mm.

The lower part of the joint pin 2 is a support table 6, the upper core box 1 is provided with a jack which is the same as the cross section of the support table 6 in shape and matched with the cross section of the support table in size, the joint pin 2 is inserted into the jack through the support table 6, and specifically, the support table 6 and the jack can be regular hexagons or regular triangles in shape. The utility model discloses a structure makes fitting pin 2 can adjust the angle, because the fitting pin of six faceted pebbles has 3 locating surfaces of group, can switch another 2 groups of faces after a set of face wearing and tearing and use, increase of service life reduces spare parts and changes frequency, reduction in production cost.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a large-scale core box fitting pin structure, includes upper core box (1), lower core box (4), and the medial surface of upper core box (1) is equipped with fitting pin (2), and lower core box (4) medial surface relevant position is equipped with guide pin cover (3) that are used for inserting fitting pin (2), fitting pin (2) be round platform form, its characterized in that: six symmetrical edge surfaces (5) arranged in the vertical direction are cut on the periphery of the mold clamping pin (2), two positioning keys (7) are arranged around the guide pin sleeve (3), the opposite inner side surfaces of the two positioning keys (7) are parallel, and the distance between the two positioning keys and the two opposite edge surfaces (5) of the mold clamping pin (2) is equal; the inner side surfaces opposite to the two positioning keys (7) are used for being attached to two opposite edge surfaces (5) of the mold clamping pin (2) to realize the positioning of the upper core box (1) and the lower core box (4).

2. The large core box clamp pin structure of claim 1, wherein: and one end of the joint pin (2) is provided with a support table (6), the upper core box (1) is provided with a jack, and the joint pin (2) is inserted into the jack through the support table (6).

3. The large core box clamp pin structure of claim 1, wherein: the width of the bottom of each edge surface (5) is 23mm, and the distance between the two opposite edge surfaces (5) is 55 mm.