Centrifugal composite mold casting roller piece molding device

Abstract

The utility model relates to a centrifugal composite mold casting roller piece molding device. The centrifugal composite mold casting roller piece molding device comprises a hole type chilling block which is arranged in a roller mold and used for molding a roller piece. A groove used for forming a roller piece is formed in the hole type chilling block. The middle of the roller die protrudes inwards in the circumferential direction to form a protruding ring. A step surface for limiting the end cover is formed between the convex ring and the inner hole of the roller die; an end cover sand mold is formed in the end cover; and a pouring hole is formed in the middle of the end cover sand mold. According to the scheme that the roller pieces are separately and centrifugally cast, the convex rings are matched with the hole type chilling blocks, and the end covers are clamped from the two ends, the positioning efficiency is effectively improved, and centrifugal casting of the roller pieces can be achieved; due to the fact that the amount of used molten steel is small, control over the mechanical property of materials is better, and the consistency of hardness can be guaranteed after centrifugal pouring is completed through independent machining of the roller pieces.

Description

Technical Field

[0001] The utility model relates to the field of roller manufacturing, in particular to a centrifugal composite shaped casting roller sheet molding device. Background Art

[0002] The products involved in the utility model are rollers used in the hot rolling production of large, medium and small steel sections; and rough and medium rolling rollers of bar and wire mills. These rollers have a common feature, that is, they all need to have a deeper hole profile (generally the hole depth is 40 to 150 mm, except for individual flat rolls for rough and medium rolling of wire and bar). The basic structure of these rollers includes: a roller neck at the transmission end, a flat head at the transmission end, a roller neck at the operating side, a roller ring of the roller body, and a rolling groove of the roller body.

[0003] In the past, the traditional roll production process was to first cast a roll with a smooth body, and then deliver it in a smooth state after processing according to the order drawing (flat roll drawing). Then the steel mill would slot it according to the hole pattern drawing, and finally put it on the machine for rolling. This method has been used for many years (since the rolling of steel, wire and bar). In the long-term steel rolling practice, it was found that this method has many disadvantages. The most prominent one is that these rolls often have deeper slots (the larger the steel, the deeper the slots), generally with a depth of 40 to 150 mm, or even deeper. This will greatly increase the hardness difference between the upper and lower parts of the rolling groove, thereby greatly reducing the wear resistance of the rolling groove, and obviously shortening the service life of the roll. Then the final problem is frequent slot and roll changes, which greatly reduces the operating rate of the rolling mill and increases the rolling cost.

[0004] The roller is the basic unit of the overall hole type, that is, the rollers are combined to form a complete hole type. By producing the rollers separately, the slotting time can be reduced and deep slotting can be avoided. However, there is no molding device specifically designed for the roller structure in the prior art. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above problems in the prior art, the utility model provides a centrifugal composite shaped casting roller sheet molding device.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] A centrifugal composite casting roller sheet molding device includes a hole-shaped cold iron for molding roller sheets arranged in a roller mold; a groove for molding roller sheets is formed in the hole-shaped cold iron; a convex ring is formed in the middle of the roller mold protruding inward in the circumferential direction; a step surface for limiting an end cover is formed between the convex ring and the inner hole of the roller mold; an end cover sand mold is formed in the end cover; and a casting hole is formed in the middle of the end cover sand mold.

[0010] Furthermore, the hole-shaped chiller is composed of two symmetrical chillers.

[0011] Furthermore, the end cover is fixedly connected to the roller mold via a fixing pin.

[0012] Furthermore, a fastening washer is abutted against the outer side of the end cover; the fastening washer is fixedly connected to the roller mold via a fixing pin.

[0013] Furthermore, a plurality of roller pin holes arranged toward the center of the circle and cooperating with the fastening pins are provided on the circumference of the openings at both ends of the roller mold.

[0014] Furthermore, the width of the convex ring is consistent with the width of the hole-shaped cold iron.

[0015] Furthermore, two parallel roller mold tracks are arranged along the outer circumference of the roller mold.

[0016] (III) Beneficial effects

[0017] The beneficial effects of the utility model are as follows: by centrifugally casting the roller piece separately, and arranging a convex ring to cooperate with the hole-shaped cold iron, the end cover is clamped from both ends, which effectively improves the positioning efficiency and can realize the centrifugal casting of the roller piece; and the separate processing of the roller piece has better control over the mechanical properties of the material due to the small amount of molten steel used, and the consistency of hardness can be guaranteed after centrifugal casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is an exploded view of the roller sheet molding device of the utility model;

[0020] Figure 2 This is a cross-sectional view of the roller sheet molding device of the utility model;

[0021] Description of reference numerals:

[0022] 10. Roller mold; 20. Hole-shaped chiller; 30. End cover; 40. Fastening washer; 50. Fastening pin; 101. Roller mold track; 102. Roller pin hole; 103. Convex ring; 104. Step surface; 301. End cover sand mold; 302. Casting hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1, please refer to Figure 1-2 As shown:

[0027] A centrifugal composite casting roller molding device comprises a hole-shaped cold iron 20 arranged in a roller mold 10; the roller mold 10 is a hollow cylindrical structure; the middle part of the roller mold 10 bulges inward to form an annular convex ring 103; the hole-shaped cold iron 20 is installed in the convex ring 103; so that the hole-shaped cold iron 20 can be conveniently positioned without the need for marking and positioning operations; a step surface 104 is formed between the convex ring 103 and the inner hole of the roller mold 10, which is formed by the convex inner ring 103, and the step surface 104 is used to realize the limit of the end cover 30 and naturally install the hole-shaped cold iron 20 to the corresponding position when the end cover 30 is installed. The installation difficulty is reduced; the width of the convex ring 103 is consistent with the width of the hole-type cold iron 20, so that the hole-type cold iron 20 can be positioned by using the limit of the end cover 30 and the step surface 104; an end cover sand mold 301 is provided on the inner side of the end cover 30, and a pouring hole 302 is formed in the middle of the end cover sand mold 301; during centrifugal pouring, molten steel is poured into the hole-type cold iron 20 through the pouring hole 302, and the roller mold 10 rotates on the centrifuge using the external roller mold runway 101 to achieve centrifugal casting; the roller mold 10 of the utility model is used to make a separate roller sheet, and the roller sheet is the basic unit into which the overall hole profile is decomposed, that is, the roller sheets combined together are a complete hole profile.

[0028] In one embodiment of the utility model, the end cover 30 is fixedly connected to the roller mold 10 by a fastening pin 50; a plurality of roller pin holes 102 arranged toward the center of the circle and cooperating with the fixing pin are provided on the circumference of the openings at both ends of the roller mold 10; the fastening pin 50 is tapered and inserted into the roller pin hole 102 from the inside of the roller mold 10 so as to abut against the side of the end cover 30 to fix the end cover 30. However, this connection method requires the lateral length of the roller mold 10 to be shorter, which is not conducive to the rotation of the roller mold 10 on the centrifuge; and the roller mold 10 needs to be redesigned.

[0029] In one embodiment of the present invention (such as Figure 2 As shown), compared with the previous embodiment, the roller mold 10 in this embodiment can directly use the existing roller mold 10. Since only one hole-shaped cold iron 20 is provided, there is a distance between the end cover 30 and the roller pin hole 102 after the hole-shaped cold iron 20 is clamped, and it cannot be directly fixed with the fastening pin 50. Therefore, a fastening washer 40 is provided on the outside of the end cover 30, and the outer end of the fastening washer 40 is close to the roller pin hole 102, so that the fastening pin 50 can be used to cooperate with the roller pin hole 102 to fix the fastening washer 40, and then squeeze and fix the end cover 30; this solution can effectively utilize the existing roller mold 10 and end cover 30 products, reduce the cost of re-molding, and the roller mold 10 has a longer lateral length, and the roller mold runway 101 is more stable when combined with the centrifuge.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A centrifugal composite casting roller molding device, characterized in that: The invention comprises a hole-shaped cold iron (20) for shaping a roller sheet arranged in a roller mold (10); a groove for shaping the roller sheet is formed in the hole-shaped cold iron (20); a convex ring (103) is formed in the middle of the roller mold (10) protruding inward in the circumferential direction; a step surface (104) for limiting an end cover (30) is formed between the convex ring (103) and the inner hole of the roller mold (10); an end cover sand mold (301) is formed in the end cover (30); and a pouring hole (302) is formed in the middle of the end cover sand mold (301).

2. A centrifugal composite casting roller molding device according to claim 1, characterized in that: The hole-shaped chiller (20) is composed of two symmetrical chillers.

3. The centrifugal composite casting roller forming device according to claim 1, characterized in that: The end cover (30) is fixedly connected to the roller mold (10) via a fixing pin.

4. The centrifugal composite casting roller molding device according to claim 1, characterized in that: A fastening washer (40) is abutted against the outer side of the end cover (30); the fastening washer (40) is fixedly connected to the roller mold (10) via a fastening pin (50).

5. A centrifugal composite casting roller molding device according to claim 3 or 4, characterized in that: The roller mold (10) is provided with a plurality of roller pin holes (102) arranged toward the center of the circle and matched with the fixing pins in the circumferential direction of the openings at both ends.

6. The centrifugal composite casting roller molding device according to claim 1, characterized in that: The width of the convex ring (103) is consistent with the width of the hole-shaped cold iron (20).

7. The centrifugal composite casting roller molding device according to claim 1, characterized in that: Two parallel roller mold tracks (101) arranged along the outer circumference are arranged on the outer side of the roller mold (10).

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