Cold core box tool
By arranging a wear-resistant bushing in the mold mounting hole of the cold core box tooling, the wear problem of the ejector rod hole is solved, the service life of the mold is extended, and the work efficiency of the tooling is improved.
Patent Information
- Application Number
- CN202323635704.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The core rod holes of existing cold-core box tooling are consistent with the mold steel material, which makes it easy to wear during long-term use, thereby shortening the service life of the mold.
Design a cold core box tooling. By setting a wear-resistant bushing in the mounting hole of the mold, the ejector rod passes through the through hole of the wear-resistant bushing and is connected to the mold to avoid direct friction between the ejector rod and the mold, thereby reducing wear.
It effectively reduces the wear of the ejector core rod hole, prolongs the service life of the mold, prevents excessive sand core material or sand running caused by core sand entering the gap, and improves the work efficiency of the tooling.
Smart Images
Figure CN222359217U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting molds, in particular to a cold core box tooling. Background Art
[0002] Casting molds are common process equipment, and cold core box is one of them. Cold core box is a process equipment for making core sand into cores.
[0003] In the prior art, the core rod hole of the cold core box tooling is formed by drilling a mold steel body. Therefore, the material of the core rod hole is consistent with the body, both of which are made of mold steel. The hardness of the core rod is lower than that of the core rod. Long-term use of the core rod will cause wear on the core rod hole. After wear, it cannot be repaired and the mold has to be scrapped.
[0004] Therefore, how to design a cold core box tooling that can reduce the wear of the core rod hole and increase the service life of the mold has become a technical problem that needs to be solved urgently in this field. Utility Model Content
[0005] The purpose of the utility model is to at least solve the problem of how to reduce the wear of the core rod hole and increase the service life of the mold. This purpose is achieved through the following technical solutions:
[0006] The first aspect of the utility model proposes a cold core box tooling, comprising: a mold, the mold having a mounting hole, the mounting hole passing through the mold; a wear-resistant bushing, mounted in the mounting hole, the wear-resistant bushing having a through hole; and a core rod, passed through the through hole, the extension direction of the through hole is the same as the extension direction of the core rod, the inner diameter of the through hole is adapted to the outer diameter of the core rod, the core rod can reciprocate along its own extension direction, and the top end of the core rod can protrude and retract into the through hole.
[0007] The cold core box tooling provided by the utility model has a wear-resistant bushing arranged in the mounting hole of the mold. When the core rod continuously protrudes out of the mounting hole during work, due to the presence of the wear-resistant bushing, the core rod will not have direct friction contact with the mold, and the mounting hole will not be worn due to the reciprocating motion of the core rod, thereby protecting the mold and improving the service life of the mold. In addition, the mounting hole is not easy to wear, and the phenomenon of excess material or sand leakage in the sand core formed due to the core sand entering the gap between the mounting hole and the core rod can be prevented, thereby further ensuring the working efficiency of the cold core box tooling.
[0008] In some embodiments of the present invention, the wear-resistant bushing is interference-fitted with the mounting hole.
[0009] In some embodiments of the utility model, the interior of the mounting hole has a limiting surface, and the wear-resistant bushing has a supporting surface; the limiting surface is used to abut against the supporting surface to limit the movement of the wear-resistant bushing to the side away from the upper surface of the mold.
[0010] In some embodiments of the present invention, the longitudinal cross-section of the mounting hole is T-shaped, and the longitudinal cross-section of the wear-resistant bushing is T-shaped.
[0011] In some embodiments of the utility model, the upper surface of the wear-resistant bushing and the upper surface of the mold are in the same plane.
[0012] In some embodiments of the present invention, the wear-resistant bushing is a chromium metal bushing.
[0013] In some embodiments of the present invention, the cold core box tooling further includes a base; the base is used to be fixedly connected to the top core plate, and the base is connected to the bottom end of the top core rod.
[0014] In some embodiments of the utility model, the base includes: a bottom plate, a surface on one side of the bottom plate is used for fixed connection with the top core plate; and a connecting block, the connecting block is fixedly installed on the surface of the bottom plate on the side away from the top core plate, and the connecting block is used to connect with the bottom end of the top core rod.
[0015] In some embodiments of the utility model, the surface of the connecting block facing away from the bottom plate has a connecting hole, and an internal thread is provided in the connecting hole; the bottom end of the top core rod is provided with an external thread, the external thread cooperates with the internal thread, and the extension direction of the external thread and the internal thread is the same as the extension direction of the top core rod.
[0016] In some embodiments of the utility model, the cold core box tooling also includes a locking screw; a screw hole that matches the locking screw thread is provided on the side wall of the connecting block, and the extension direction of the screw hole is perpendicular to the extension direction of the top core rod; the locking screw is used to abut against the part of the bottom end of the top core rod extending into the connecting hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0018] Figure 1 An exploded view of the structure of the cold box tooling provided in the embodiment of the utility model;
[0019] Figure 2 A schematic diagram of the structure of a cold box tooling provided in an embodiment of the utility model;
[0020] Figure 3 for Figure 2 Sectional view in the AA direction;
[0021] Figure 4 A cross-sectional view of the matching relationship between the wear-resistant bushing and the mounting hole provided in the embodiment of the utility model;
[0022] Figure 5 A schematic diagram of the matching relationship between the base and the bottom end of the top core rod in the cold core box tooling provided in an embodiment of the utility model;
[0023] Figure 6 for Figure 5 Cross-sectional view along the BB direction.
[0024] The accompanying drawings are marked as follows: 1. mold; 2. wear-resistant bushing; 3. core rod; 4. mounting hole; 5. through hole; 6. supporting surface; 7. limiting surface; 8. base; 9. bottom plate; 10. connecting block; 11. connecting hole; 12. internal thread; 13. external thread; 14. set screw; 15. threaded hole; 16. first side; 17. second side; 18. bottom; 19. upper surface of wear-resistant bushing; 20. mounting screw. DETAILED DESCRIPTION
[0025] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0026] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0027] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0028] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0029] Figure 1 An exploded view of the structure of the cold box tooling provided in the embodiment of the utility model; Figure 2 A schematic diagram of the structure of a cold box tooling provided in an embodiment of the utility model; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 A cross-sectional view of the matching relationship between the wear-resistant bushing and the mounting hole provided in the embodiment of the utility model; Figure 1-Figure 4 According to an embodiment of the utility model, a cold core box tooling is proposed, comprising: a mold 1, a wear-resistant bushing 2 and a core rod 3; wherein the mold 1 has a mounting hole 4 for mounting the wear-resistant bushing 2, and the mounting hole 4 runs through the mold 1; the wear-resistant bushing 2 has a through hole 5 for penetrating the core rod 3, the inner diameter of the through hole 5 is adapted to the outer diameter of the core rod 3, and the extension direction of the through hole 5 is the same as the extension direction of the core rod 3; the core rod 3 can reciprocate along its own extension direction, and the top end of the core rod 3 can protrude and retract into the through hole.
[0030] Among them, the top core rod 3 has a first state and a second state; when the top core rod 3 is in the first state, the top end of the top core rod 3 and the upper surface of the mold 1 are in the same plane; when the top core rod 3 is in the second state, the top core rod 3 can protrude from the upper surface of the mold 1 through the mounting hole 4.
[0031] The cold core box tooling provided in the present embodiment has a wear-resistant bushing 2 arranged in the mounting hole 4 of the mold 1. When the core rod 3 continuously protrudes out of the mounting hole 4 during operation, due to the presence of the wear-resistant bushing 2, the core rod 3 will not have direct friction contact with the mold 1, and the mounting hole 4 will not be worn due to the reciprocating motion of the core rod 3, thereby protecting the mold 1 and improving the service life of the mold 1. In addition, the mounting hole 4 is not easy to wear, and can also prevent the phenomenon of excess material or sand leakage in the sand core formed due to the core sand entering the gap between the mounting hole 4 and the core rod 3, further ensuring the working efficiency of the cold core box tooling.
[0032] As an optional implementation, the wear-resistant bushing 2 and the mounting hole 4 are interference fit.
[0033] In this embodiment, the interference fit connection is simple and has a good fastening effect.
[0034] refer to Figure 1 and Figure 4 As an optional embodiment, the interior of the mounting hole 4 has a limiting surface 7, and the wear-resistant bushing 2 has a supporting surface 6; the limiting surface 7 is used to abut against the supporting surface 6 to limit the movement of the wear-resistant bushing 2 to the side away from the upper surface of the mold 1.
[0035] Continue to refer Figure 1 and Figure 4 Specifically, the longitudinal cross-section of the mounting hole 4 is T-shaped, and the longitudinal cross-section of the wear-resistant bushing 2 is T-shaped.
[0036] The longitudinal section is a section parallel to the axis of the mounting hole 4 .
[0037] During installation, the wear-resistant bushing 2 is extended from the upper surface of the mold 1 into the mounting hole 4, the limiting surface 7 and the supporting surface 6 are abutted against each other, and the first side edge 16 and the second side edge 17 of the wear-resistant bushing 2 are respectively abutted against the inner side wall of the mounting hole 4, so as to achieve the installation of the wear-resistant bushing 2. When it is necessary to disassemble, it can be removed by simply extending a hammer or other device from the lower surface of the mold 1 into the mounting hole 4 to knock the bottom edge 18 of the wear-resistant bushing 2.
[0038] As an optional embodiment, the upper surface 19 of the wear-resistant bushing and the upper surface of the mold 1 are in the same plane.
[0039] In this embodiment, the upper surface 19 of the wear-resistant bushing is in the same plane as the upper surface of the mold 1, so that the entire wear-resistant bushing 2 can be interference fit with the mounting hole 4 on the mold 1, which has a better fastening effect and improves the overall flatness of the upper surface of the mold 1.
[0040] As an optional implementation, the wear-resistant bushing 2 is a chromium metal bushing, and the material thereof can be 40Cr.
[0041] In this embodiment, the hardness of 40Cr after heat treatment can reach 40-520HRC, and it has high fatigue strength and good toughness, and is not easily damaged by the friction of the core rod 3.
[0042] Figure 5 A schematic diagram of the matching relationship between the base and the bottom end of the top core rod in the cold core box tooling provided in an embodiment of the utility model; Figure 6 for Figure 5 Cross-sectional view in the BB direction; reference Figure 5-Figure 6 As an optional implementation, the cold core box tooling further includes a base 8 ; the base 8 is used to be fixedly connected to the top core plate, and the base 8 is connected to the bottom end of the top core rod 3 .
[0043] In this embodiment, specifically, the base 8 includes a bottom plate 9 and a connecting block 10; the surface on one side of the bottom plate 9 is used for fixed connection with the top core plate; the connecting block 10 is fixedly installed on the surface of the bottom plate 9 on the side away from the top core plate, and the connecting block 10 is used to connect with the bottom end of the top core rod 3. The surface of the connecting block 10 on the side away from the bottom plate 9 has a connecting hole 11; an internal thread 12 is provided in the connecting hole 11, and an external thread 13 matching the internal thread 12 is provided at the bottom end of the top core rod 3, and the extension direction of the internal thread 12 and the external thread 13 are both the same as the extension direction of the top core rod 3.
[0044] Among them, reference Figure 1 , Figure 2 , Figure 3 and Figure 6 The connection block 10 may be provided with a plurality of threaded holes 15 , and the connection block 10 may be threadedly connected to the base plate 9 by installing screws 20 .
[0045] In this embodiment, during installation, the bottom end of the top core rod 3 is screwed into the connecting hole 11 of the connecting block 10; when the length of the top core rod 3 needs to be adjusted, the screwing depth can be selected according to the actual working conditions to achieve the adjustment of the length of the top core rod 3.
[0046] This arrangement ensures the stability of the connection between the bottom end of the core rod 3 and the connecting block 10 and facilitates the adjustment of the length of the core rod 3 to suit different working conditions.
[0047] like Figure 1 , Figure 2 and Figure 5As shown, as an optional embodiment, the cold core box tooling also includes a locking screw 14; a screw hole threadedly matched with the locking screw 14 is provided on the side wall of the connecting block 10, and the extension direction of the screw hole is perpendicular to the extension direction of the top core rod 3; the locking screw 14 is used to abut against the part of the bottom end of the top core rod 3 extending into the connecting hole 11.
[0048] There may be multiple setscrews 14 and multiple screw holes.
[0049] In this embodiment, after the length of the top core rod 3 is adjusted, the set screw 14 can be screwed into the screw hole so that the set screw 14 abuts against the bottom end of the top core rod 3 extending into the connecting hole 11 to further ensure the stability of the connection between the bottom end of the top core rod 3 and the connecting block 10.
[0050] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A cold box tooling, characterized in that: include: A mold, wherein the mold has a mounting hole, and the mounting hole passes through the mold; a wear-resistant bushing mounted in the mounting hole, the wear-resistant bushing having a through hole; and A core rod is passed through the through hole, the extension direction of the through hole is the same as the extension direction of the core rod, the inner diameter of the through hole is matched with the outer diameter of the core rod, the core rod can reciprocate along its own extension direction, and the top end of the core rod can extend out of and retract into the through hole.
2. The cold box tooling according to claim 1, characterized in that: The wear-resistant bushing is interference-fitted with the mounting hole.
3. The cold box tooling according to claim 2, characterized in that: The interior of the mounting hole is provided with a limiting surface; The wear-resistant bushing has a supporting surface, and the limiting surface is used to abut against the supporting surface to limit the wear-resistant bushing from moving to a side away from the upper surface of the mold.
4. The cold box tooling according to claim 3, characterized in that: The longitudinal cross section of the mounting hole is T-shaped, and the longitudinal cross section of the wear-resistant bushing is T-shaped.
5. The cold box tooling according to claim 1, characterized in that: The upper surface of the wear-resistant bushing is in the same plane as the upper surface of the mold.
6. The cold box tooling according to claim 1, characterized in that: The wear-resistant bushing is a chromium metal bushing.
7. The cold box tooling according to any one of claims 1 to 6, characterized in that: The cold box tooling also includes: A base, wherein the base is used to be fixedly connected to the top core plate, and the base is connected to the bottom end of the top core rod.
8. The cold box tooling according to claim 7, characterized in that: The base comprises: A bottom plate, a surface on one side of the bottom plate being used for fixed connection with the top core plate; and A connecting block is fixedly mounted on a surface of the bottom plate that is away from the top core plate, and the connecting block is used to be connected to the bottom end of the top core rod.
9. The cold box tooling according to claim 8, characterized in that: The surface of the connection block facing away from the bottom plate has a connection hole, and the connection hole is provided with an internal thread; The bottom end of the core rod is provided with an external thread, the external thread matches the internal thread, and the extension direction of the external thread and the internal thread is the same as the extension direction of the core rod.
10. The cold box tooling according to claim 9, characterized in that: The cold box tooling also includes: a set screw; A screw hole is provided on the side wall of the connecting block, the screw hole is threadedly matched with the fixing screw, the extension direction of the screw hole is perpendicular to the extension direction of the top core rod, and the fixing screw is used to abut against the part of the bottom end of the top core rod extending into the connecting hole.