Water jacket core assembly facilitating bolt hole forming

Abstract

A water jacket core assembly facilitating bolt hole forming comprises a first water cavity core and a second water cavity core, the first water cavity core and the second water cavity core are detachably and fixedly connected, an installation channel is formed between the first water cavity core and the second water cavity core, and an air channel core is arranged in the installation channel; the first water cavity core and the second water cavity core are each provided with a plurality of water cavity core mounting holes corresponding to bolt holes to be formed at intervals, and chilling block sleeves are embedded in the water cavity core mounting holes. Bolt hole forming of water jacket products is facilitated, the bolt hole forming quality is improved, and therefore the yield of the water jacket products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production and manufacturing of water jacket products, in particular to a water jacket core component which is convenient for forming bolt holes. Background Art

[0002] Water jackets are used to transfer heat and are often cast. Their complex structure presents significant challenges in design, production, and manufacturing, particularly in the complex molding of the water cavity. Due to the numerous, long, and slender bolt holes, limited riser shrinkage feeding, and the large product size, flaw detectors cannot perform pre-inspections. Leakage testing is required after fabrication, such as a 0.5-map water pressure test, which lasts 5 minutes and does not tolerate leakage. Many products are scrapped due to leaks during the final process, resulting in a very low yield. This not only wastes manpower and resources but also impacts product delivery.

[0003] During the production process, many processes have been verified: placing cold iron in the airway core, placing cold iron in the outer mold, placing cold iron nails in the bolt holes, forming sand cores with film coating on the bolt holes, placing cold iron sleeves under the bolt holes, using insulating risers, placing insulating agents in the risers, tilting the casting sand box, strictly controlling the material and casting temperature, etc. However, the results have not been good, and the shrinkage and air leakage of the bolt holes have been difficult to cure. Utility Model Content

[0004] The purpose of the utility model is to provide a water jacket core assembly which is convenient for forming bolt holes, facilitates the forming of bolt holes in water jacket products, improves the forming quality of bolt holes, and thus improves the yield of water jacket products.

[0005] The technical solution adopted by this utility model is:

[0006] A water jacket core subassembly that is convenient for forming bolt holes comprises a first water cavity core and a second water cavity core, the first water cavity core and the second water cavity core are detachably and fixedly connected, an installation channel is provided between the first water cavity core and the second water cavity core, an airway core is provided in the installation channel; the first water cavity core and the second water cavity core are both provided with a plurality of spaced water cavity core installation holes corresponding to the bolt holes to be formed, and a cold iron sleeve is embedded in the water cavity core installation hole.

[0007] The cooling iron sleeve is cylindrical and has a hollow structure inside.

[0008] A vertical cutaway portion is provided on the outer side of the cold iron sleeve, and the length of the cutaway portion is smaller than that of the cold iron sleeve; the water cavity core mounting hole is communicated with the mounting channel, and there is a gap between the cutaway portion and the corresponding portion of the airway core.

[0009] The bottom of the cut surface is provided with an arc-shaped transition portion.

[0010] The outer diameter of the cold iron sleeve is the same as the inner diameter of the bolt hole to be formed, and the length of the cold iron sleeve is the same as the length of the water cavity core installation hole.

[0011] The chiller sleeve is made of 1mm thick SPCC cold-rolled steel plate.

[0012] The first water cavity core and the second water cavity core are both provided with six spaced water cavity core mounting holes.

[0013] The water cavity core mounting holes on the first water cavity core correspond to the water cavity core mounting holes on the second water cavity core in a one-to-one manner, and the longitudinal center planes of the cooling iron sleeves in the two corresponding water cavity core mounting holes are on the same plane.

[0014] The utility model is convenient for forming bolt holes of water jacket products, improves the forming quality of bolt holes, and thus improves the yield of water jacket products. The first water cavity core and the second water cavity core are detachably fixedly connected, which is convenient for installation and disassembly. An installation channel is provided between the first water cavity core and the second water cavity core for installing an airway core. The first water cavity core and the second water cavity core are both provided with a plurality of spaced water cavity core mounting holes corresponding to the bolt holes to be formed. A cold iron sleeve is embedded in the water cavity core mounting hole. The cold iron sleeve first has a chilling effect. The casting structure is dense within 5mm-7mm around the cold iron sleeve. After the bolt hole is processed, the inner wall of the hole is smooth and has no shrinkage defect, thereby reducing the occurrence of leakage and scrap during leak testing. Secondly, after pouring molten iron, the cold iron sleeve is integrated into the casting to form the bolt pile, so that the bolt pile inside the casting is more regular. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 Schematic diagram of the three-dimensional structure of the chiller sleeve;

[0018] Figure 4 This is a schematic diagram of the main structure of the chiller sleeve;

[0019] Figure 5 It is a schematic diagram of the top view of the cold iron sleeve.

[0020] In the figure: 1-first water cavity core, 2-airway core, 3-cold iron sleeve, 4-second water cavity core, 5-cutting portion, 6-transition portion. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 5As shown, a water jacket core subassembly that is convenient for forming bolt holes includes a first water cavity core 1 and a second water cavity core 4. The first water cavity core 1 and the second water cavity core 4 are detachably fixedly connected to facilitate installation and disassembly. An installation channel is provided between the first water cavity core 1 and the second water cavity core 4, and an airway core 2 is provided in the installation channel; the first water cavity core 1 and the second water cavity core 4 are both provided with a plurality of spaced water cavity core installation holes corresponding to the bolt holes to be formed, and a chilling iron sleeve 3 is embedded in the water cavity core installation hole. The outer wall of the chilling iron sleeve 3 is fixed to the inner wall of the water cavity core installation hole (cannot rotate or move), playing the dual role of quenching and forming the casting bolt pile.

[0022] The chiller 3 is cylindrical and has a hollow structure inside.

[0023] A vertical cut portion 5 is provided on the outside of the chill sleeve 3, and the length of the cut portion 5 is smaller than the length of the chill sleeve 3; the water cavity core mounting hole is connected to the mounting channel, and there is a gap between the cut portion 5 and the corresponding part of the airway core 2. The cut portion 5 is to avoid the airway core 2, so that the molten iron can fully wrap the formed chill sleeve 3 to produce better castings.

[0024] The bottom of the cut surface 5 is provided with an arc-shaped transition portion 6 which plays a transition role. The opening of the transition portion 6 faces outwards, which facilitates a smoother transition between the cut surface 5 and the lower portion of the chill sleeve 3.

[0025] The outer diameter of the cold iron sleeve 3 is the same as the inner diameter of the bolt hole to be formed, the length of the cold iron sleeve 3 is the same as the length of the water cavity core mounting hole, and the water cavity core mounting hole passes through the corresponding part of the water jacket core assembly, that is, the end of the water cavity core mounting hole extends to the side of the corresponding part of the water jacket core assembly to ensure the formation of the bolt hole.

[0026] The chiller sleeve 3 is made of SPCC cold-rolled steel plate with a thickness of 1 mm, so that it has good compatibility with the casting material.

[0027] Six spaced water cavity core mounting holes are provided on each of the first water cavity core 1 and the second water cavity core 4 .

[0028] The water cavity core mounting holes on the first water cavity core 1 correspond to the water cavity core mounting holes on the second water cavity core 4 one by one, and the longitudinal center planes of the cooling iron sleeves 3 in the two corresponding water cavity core mounting holes are on the same plane.

[0029] The utility model is convenient for forming the bolt holes of water jacket products, improves the forming quality of the bolt holes, and thus improves the yield of water jacket products. During installation, the airway core 2 is arranged in the installation channel between the first water cavity core 1 and the second water cavity core 4, wherein the first water cavity core 1 and the second water cavity core 4 are detachably fixedly connected, and the cold iron sleeve 3 is embedded in the corresponding water cavity core installation hole. After the water jacket core subassembly is assembled, it can be lowered into the mold cavity and then cast. During the casting process, the cold iron sleeve 3 first has a chilling effect, and the casting structure within 5mm-7mm around it is dense. After the bolt hole is processed, the inner wall of the hole is smooth and has no shrinkage defects, thereby reducing the occurrence of air leakage and scrap during leak testing. Secondly, after pouring molten iron, the cold iron sleeve 3 is integrated into the casting to form the bolt pile.

[0030] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A water jacket core assembly that facilitates bolt hole formation, characterized by: It includes a first water cavity core and a second water cavity core, which are detachably fixedly connected. An installation channel is provided between the first water cavity core and the second water cavity core, and an airway core is provided in the installation channel; the first water cavity core and the second water cavity core are both provided with a plurality of spaced water cavity core installation holes corresponding to the bolt holes to be formed, and a cold iron sleeve is embedded in the water cavity core installation hole.

2. The water jacket core assembly for facilitating bolt hole formation according to claim 1, characterized in that: The cooling iron sleeve is cylindrical and has a hollow structure inside.

3. The water jacket core assembly for facilitating bolt hole formation according to claim 2, characterized in that: A vertical cutaway portion is provided on the outer side of the cold iron sleeve, and the length of the cutaway portion is smaller than that of the cold iron sleeve; the water cavity core mounting hole is communicated with the mounting channel, and there is a gap between the cutaway portion and the corresponding portion of the airway core.

4. The water jacket core assembly for facilitating bolt hole formation according to claim 3, characterized in that: The bottom of the cut surface is provided with an arc-shaped transition portion.

5. The water jacket core assembly for facilitating bolt hole formation according to claim 2, characterized in that: The outer diameter of the cold iron sleeve is the same as the inner diameter of the bolt hole to be formed, and the length of the cold iron sleeve is the same as the length of the water cavity core installation hole.

6. The water jacket core assembly for facilitating bolt hole formation according to claim 1, characterized in that: The chiller sleeve is made of 1mm thick SPCC cold-rolled steel plate.

7. The water jacket core assembly for facilitating bolt hole formation according to claim 1, characterized in that: The first water cavity core and the second water cavity core are both provided with six spaced water cavity core mounting holes.

8. The water jacket core assembly for facilitating bolt hole formation according to claim 7, characterized in that: The water cavity core mounting hole on the first water cavity core corresponds to the water cavity core mounting hole on the second water cavity core, and the longitudinal center planes of the cooling iron sleeves in the two corresponding water cavity core mounting holes are on the same plane.

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