Casting ejector rod hole sand core drilling tool
By using a limiting block and a sliding mechanism in the drilling fixture for casting top rod holes, the problems of drilling offset and sidewall penetration caused by traditional manual positioning are solved, achieving higher drilling accuracy and lower scrap rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGCHAI
- Filing Date
- 2025-04-18
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional drilling methods for sand core top rod holes are easily affected by human factors, which can lead to deviation of the drilling position or penetration of the sand core sidewall, increasing the scrap rate.
A drilling fixture for casting ejector pin holes is designed. It uses a limiting block and a sliding mechanism to limit the lateral displacement of the sand core, and a thrust block to limit the hole depth to ensure drilling accuracy.
It effectively prevents the sand core from shifting laterally and penetrating the sidewall during drilling, improving drilling accuracy and reducing the scrap rate.
Smart Images
Figure CN224195865U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of sand core casting equipment, and in particular relates to a tooling for drilling sand cores for casting top rod holes. Background Technology
[0002] In the casting production process, sand cores are key components for casting formation, and the machining accuracy of their ejector pin holes directly affects the casting quality and subsequent processing effects. Traditional methods for drilling ejector pin holes in sand cores mainly rely on manual positioning and operation by the operator. The specific process involves the operator measuring and marking the drilling positions one by one, then using a handheld drilling mechanism to drill holes in the sand core sequentially. Manual operation is susceptible to human error, such as visual errors or insufficient hand stability, which can lead to drilling position deviations or even drilling through the sidewalls of the sand core, resulting in an increased scrap rate.
[0003] Therefore, how to avoid positional displacement and penetration of the sand core sidewall during drilling of the casting ejector pin hole is a technical problem that urgently needs to be solved by those skilled in the art.
[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content
[0005] This disclosure provides at least one tooling for drilling cores for casting top rod holes.
[0006] In a first aspect, embodiments of this disclosure provide a drilling fixture for casting ejector pin holes using sand core drilling, comprising:
[0007] A base on which a mold is mounted;
[0008] The fixture has multiple limiting blocks distributed on its upper end face, and the limiting blocks cooperate with each other to form a sand core placement position;
[0009] The drilling mechanism is aligned with the corresponding machined surface of the sand core;
[0010] A sliding mechanism for supporting a jig includes a slide rail and a movable component that can move back and forth along the slide rail. Each slide rail is provided with a limiting component that abuts against the inner side of the movable component to limit the lateral displacement of the sand core on the jig.
[0011] The sliding mechanism is provided with a thrust block in its travel direction, which is suitable for limiting the maximum stroke of the sliding mechanism to limit the hole depth of the sand core.
[0012] In one optional embodiment, the bottom of the fixture is provided with a connector, and the movable part is connected to the fixture via a connecting shaft passing through the connector.
[0013] In one alternative embodiment, the drilling mechanism is mounted on a fixing plate, which is vertically mounted on a base.
[0014] In one alternative embodiment, the drilling mechanism includes a plurality of drill bits arranged in a horizontal direction;
[0015] The drilling tool includes a motor and a drill bit. The motor drives the drill bit to rotate through a coupling, and the fixture drives the sand core to feed towards the drill bit through a sliding mechanism.
[0016] In one optional embodiment, a protrusion is provided below the fixture, the protrusion being positioned corresponding to the thrust block, and the lower end face of the protrusion being lower than the upper end face of the thrust block.
[0017] Secondly, this disclosure also provides a tooling for drilling cores for casting ejector pin holes, comprising:
[0018] The fixture has a placement position on its upper end face for limiting the placement of the sand core;
[0019] The drilling mechanism is aligned with the corresponding machined surface of the sand core;
[0020] A sliding mechanism is used to support the fixture, and the sliding mechanism is provided with limit structures in both the lateral and forward directions so that the sand core on the fixture is laterally limited during the drilling mechanism and the hole depth of the sand core is limited.
[0021] In one optional embodiment, the upper surface of the fixture is provided with a plurality of limiting blocks, and the limiting blocks cooperate with each other to form a sand core placement position.
[0022] In one alternative embodiment, the sliding mechanism includes a slide rail and a movable member that can move back and forth along the slide rail; and,
[0023] The bottom of the fixture is provided with a connector, and the movable part is connected to the fixture through a connecting shaft passing through the connector.
[0024] In one optional embodiment, the limiting structure includes a limiting member disposed on the slide rail and a thrust block located in the traveling direction of the sliding mechanism.
[0025] Wherein, the limiting member abuts against the inner side of the moving member to limit the lateral displacement of the sand core on the fixture; and,
[0026] The thrust block is adapted to limit the maximum stroke of the sliding mechanism in order to limit the hole depth of the sand core.
[0027] In one alternative embodiment, the drilling mechanism includes a plurality of drill bits arranged in a horizontal direction;
[0028] The drilling tool includes a motor and a drill bit. The motor drives the drill bit to rotate through a coupling, and the fixture drives the sand core to feed towards the drill bit through a sliding mechanism.
[0029] The beneficial effects of this utility model are that the sand core drilling fixture prevents the sand core from shaking by setting a limiting block on the fixture; the sliding mechanism below the fixture is equipped with a limiting component so that the fixture loaded with the sand core will not deviate laterally when it moves towards the drilling mechanism to drill; in addition, a thrust block is set in the travel direction of the sliding mechanism, which is suitable for limiting the maximum stroke of the sliding mechanism to prevent the drilling depth from exceeding the side wall thickness of the sand core, thereby preventing the drill bit from penetrating the side wall of the sand core.
[0030] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.
[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0033] Figure 1 A perspective view of a casting ejector pin hole sand core drilling tool provided in an embodiment of this disclosure;
[0034] Figure 2 This is a side view of a casting core drilling tool provided in an embodiment of the present disclosure.
[0035] In the picture:
[0036] 100. Base; 200. Fixture; 210. Limiting block; 220. Connecting piece; 230. Connecting shaft; 240. Protrusion; 300. Sand core; 400. Drilling mechanism; 410. Drill tool; 411. Motor; 412. Drill bit; 413. Coupling; 500. Sliding mechanism; 510. Slide rail; 520. Moving part; 530. Limiting piece; 600. Thrust block; 700. Fixing plate. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0038] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0039] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.
[0040] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0041] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0042] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0043] Research has revealed the following drawbacks of existing technologies: the traditional drilling method for sand core top rod holes mainly relies on manual positioning and operation by the operator. The specific process is as follows: the operator needs to measure and mark the drilling position one by one, and then use the hand-held drilling mechanism to drill holes in the sand core in sequence. Manual operation is easily affected by human factors, such as visual errors or insufficient hand stability, which may lead to the drilling position being offset or the sand core sidewall being penetrated, resulting in an increased scrap rate.
[0044] Based on the above research, this disclosure provides a casting ejector pin hole sand core drilling fixture. By setting a limiting structure in the lateral and forward directions of the sliding mechanism, the limiting structure limits the sand core on the fixture in the lateral direction and limits the hole depth of the sand core, thus solving the above problems.
[0045] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.
[0046] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0047] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0048] See Figure 1This disclosure provides a drilling fixture for casting top rod holes and sand cores, including: a base 100 on which a jig 200 is mounted. Multiple limiting blocks 210 are distributed on the upper surface of the jig 200. Each limiting block 210 can be a rectangular metal block, which is fixed to the upper surface of the jig 200 by welding. The limiting blocks 210 cooperate to form a sand core 300 placement position, used to fix the sand core 300 and prevent it from shaking in the sand core 300 placement position.
[0049] See also Figure 1 A drilling mechanism 400 is provided opposite the sand core 300. The drill bit 412 of the drilling mechanism 400 is aligned with the corresponding processing surface of the sand core 300 to ensure accurate drilling position.
[0050] See also Figure 1 A sliding mechanism 500 is provided below the jig 200. The sliding mechanism 500 supports the jig 200 to drive the sand core 300 on the jig 200 to feed towards the drill bit 412. The sliding mechanism 500 includes a slide rail 510 and a movable member 520 that can move back and forth along the slide rail 510. The movable member 520 can be a roller, which rolls with the slide rail 510 to drive the jig 200 and the sand core 300 to move axially along the slide rail 510. Each slide rail 510 is provided with a limiting member 530. The limiting member 530 and the slide rail 510 form an L-shaped cross-section. The side of the limiting member 530 abuts against the inner side of the movable member 520 to limit the lateral displacement of the sand core 300 on the jig 200, thereby preventing the casting ejector pin hole sand core 300 from shifting position during drilling.
[0051] See also Figure 1 The sliding mechanism 500 is provided with a thrust block 600 in the direction of travel, which is suitable for limiting the maximum stroke of the sliding mechanism 500 to limit the hole depth of the sand core 300, thereby preventing the sand core 300 from penetrating the side wall of the sand core 300 during drilling.
[0052] See also Figure 1 In some embodiments, a connector 220 is provided at the bottom of the fixture 200, and the movable part 520 is connected to the fixture 200 through a connecting shaft 230 passing through the connector 220.
[0053] See also Figure 1 In some embodiments, the drilling mechanism 400 is mounted on a fixing plate 700, which is vertically mounted on the base 100. The fixing plate 700 is mounted perpendicular to the base 100, which allows the axis of the drill bit 412 to be orthogonal to the machining surface of the horizontally placed sand core 300.
[0054] See also Figure 1In some embodiments, the drilling mechanism 400 includes a plurality of drill bits 410 arranged in a horizontal direction; each drill bit 410 includes a motor 411 and a drill bit 412. The motor 411 drives the drill bit 412 to rotate via a coupling 413. The coupling 413 can be a flexible coupling to buffer the vibration of the motor 411 and the drill bit 412. When the fixture 200 drives the sand core 300 to move towards the drill bit 412 via the sliding mechanism 500, the drill bit 412 is adapted to drill holes in the machined surface of the sand core 300.
[0055] See Figure 2 In some embodiments, a protrusion 240 is provided below the jig 200, corresponding to the position of the thrust block 600, and the lower end face of the protrusion 240 is lower than the upper end face of the thrust block 600. A self-locking effect is generated the moment the protrusion 240 contacts the thrust block 600. The position of the thrust block 600 is set according to the length of the drill bit 412 and the sidewall thickness of the sand core 300, such that the maximum stroke of the sliding mechanism 500 is equal to the sidewall thickness of the sand core 300 minus a safety margin. By limiting the protrusion 240 with the thrust block 600, the maximum stroke of the sliding mechanism 500 is restricted, thereby limiting the hole depth of the sand core 300 and preventing the cast ejector pin hole sand core 300 from penetrating the sidewall of the sand core 300 during drilling.
[0056] In summary, this core drilling fixture prevents the core 300 from shaking by setting a limiting block 210 on the fixture 200; the sliding mechanism 500 below the fixture 200 is equipped with a limiting element 530, so that the fixture 200 carrying the core 300 will not deviate laterally when it approaches the drilling mechanism 400 for drilling; in addition, a thrust block 600 is provided in the travel direction of the sliding mechanism 500, which is suitable for limiting the maximum stroke of the sliding mechanism 500 to prevent the drilling depth from exceeding the side wall thickness of the core 300, thereby preventing the drill bit 412 from penetrating the side wall of the core 300.
[0057] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0058] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.
[0059] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.
[0060] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.
[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A tooling for drilling sand cores for casting ejector pin holes, characterized in that, include: A base (100) on which a fixture (200) is provided; The fixture (200) has multiple limiting blocks (210) distributed on its upper end face, and each of the limiting blocks (210) cooperates with each other to form a sand core (300) placement position; A drilling mechanism (400) is aligned with the corresponding machined surface of the sand core (300); A sliding mechanism (500) is used to support a jig (200) and includes a slide rail (510) and a movable member (520) that can move back and forth along the slide rail (510). Each slide rail (510) is provided with a limiting member (530), which abuts against the inner side of the movable member (520) to limit the lateral displacement of the sand core (300) on the jig (200). The sliding mechanism (500) is provided with a thrust block (600) in the direction of travel, which is suitable for limiting the maximum stroke of the sliding mechanism (500) to limit the hole depth of the sand core (300).
2. The core drilling fixture as described in claim 1, characterized in that, The bottom of the fixture (200) is provided with a connector (220), and the movable part (520) is connected to the fixture (200) through a connecting shaft (230) passing through the connector (220).
3. The core drilling fixture as described in claim 1, characterized in that, The drilling mechanism (400) is mounted on a fixing plate (700), which is vertically mounted on a base (100).
4. The core drilling fixture as described in claim 1, characterized in that, The drilling mechanism (400) includes a plurality of drill bits (410) arranged in a horizontal direction. The drilling tool includes a motor (411) and a drill bit (412). The motor (411) drives the drill bit (412) to rotate through a coupling (413), and the fixture (200) drives the sand core (300) to feed towards the drill bit (412) through a sliding mechanism (500).
5. The core drilling fixture as described in claim 1, characterized in that, A protrusion (240) is provided below the fixture (200), the protrusion (240) corresponds to the position of the thrust block (600), and the lower end face of the protrusion (240) is lower than the upper end face of the thrust block (600).
6. A core drilling tool, characterized in that, include: The fixture (200) has a placement position for limiting the sand core (300) on its upper end face; A drilling mechanism (400) is aligned with the corresponding machined surface of the sand core (300); A sliding mechanism (500) is used to support the jig (200), and the sliding mechanism (500) is provided with a limiting structure in both the lateral and forward directions so that the sand core (300) on the jig (200) is laterally limited during the drilling mechanism (400) and the hole depth of the sand core (300) is limited.
7. The core drilling fixture as described in claim 6, characterized in that, The upper surface of the fixture (200) is provided with a plurality of limiting blocks (210), and each limiting block (210) cooperates with each other to form a sand core (300) placement position.
8. The core drilling fixture as described in claim 6, characterized in that, The sliding mechanism (500) includes a slide rail (510) and a movable member (520) that can move back and forth along the slide rail (510); and, The bottom of the fixture (200) is provided with a connector (220), and the movable part (520) is connected to the fixture (200) through a connecting shaft (230) passing through the connector (220).
9. The core drilling fixture as described in claim 8, characterized in that, The limiting structure includes a limiting member (530) disposed on the slide rail and a thrust block (600) located in the traveling direction of the sliding mechanism (500). The limiting member (530) abuts against the inner side of the moving member (520) to limit the lateral displacement of the sand core (300) on the jig (200); and, The thrust block (600) is adapted to limit the maximum stroke of the sliding mechanism (500) to limit the hole depth of the sand core (300).
10. The core drilling fixture as described in claim 6, characterized in that, The drilling mechanism (400) includes a plurality of drill bits (410) arranged in a horizontal direction. The drilling tool includes a motor (411) and a drill bit (412). The motor (411) drives the drill bit (412) to rotate through a coupling (413), and the fixture (200) drives the sand core (300) to feed towards the drill bit (412) through a sliding mechanism (500).