Slotting type loose piece mold device for machining slender bolt

Abstract

The utility model provides a slotted loose piece mold device for processing a slender bolt, and belongs to the technical field of hot core box precoated sand core making in casting. The slotted loose piece mold device comprises a mold body, a loose piece and a positioning pin, the mold body comprises a first side mold body and a second side mold body which are oppositely arranged, the loose piece is arranged on the first side mold body, a positioning groove is formed in the middle of the loose piece, and the positioning pin is fixed to the second side mold body. The positioning pin is matched with the positioning groove in shape and size, and the positioning pin is inserted into the positioning groove. According to the utility model, the loose piece can be accurately positioned in the die body, the problem of hole deviation of the slender bolt processing is solved, and the precision and quality of the slender bolt processing hole are improved.

Description

Technical Field

[0001] This utility model belongs to the field of core-making technology of hot core box coated sand in casting, specifically relating to a slotted movable block mold device for processing slender bolts. Background Technology

[0002] In the field of mechanical manufacturing, slender bolts, as critical connecting components, are widely used in industries such as automotive, aerospace, and heavy equipment. Their machining accuracy directly affects assembly quality and equipment reliability. In traditional casting processes, slender bolt blanks are typically formed using hot-core box coated sand core-making technology, requiring a movable block in the mold to form the bolt's threaded or locating holes. However, due to the special characteristics of the bolt's slender structure (large length-to-diameter ratio, poor rigidity), the movable block is easily affected by sand flow impact or mechanical vibration during mold closing, resulting in radial displacement or axial deflection (i.e., "head trimming"), causing the blank's hole position to shift. This deviation is difficult to completely correct in subsequent machining, not only increasing the scrap rate but also reducing the bolt's fatigue strength and assembly accuracy, and in severe cases, even causing equipment failure.

[0003] In existing mold designs, the fixing of the movable block mainly relies on the simple limiting structure of the mold body, such as planar contact or bolt locking. This method has significant drawbacks: Insufficient positioning accuracy: The contact between the movable block and the mold is mostly surface contact, lacking axial constraint. During mold closing, minor displacement due to external forces can easily occur, leading to accumulated errors in hole positions. Poor versatility: Traditional mold movable block installation structures are simple and difficult to adapt to the processing requirements of bolts of different specifications. Replacing the movable block requires readjusting the mold, resulting in low efficiency. Complex structure: Some improved solutions use multi-stage locking mechanisms or additional clamps, which can improve stability, but increase mold complexity, increase manufacturing costs, and make maintenance inconvenient. Material limitations: Ordinary cast iron molds (such as HT200) are prone to deformation under high temperature and pressure, further exacerbating the risk of movable block displacement.

[0004] To overcome the problem of hole deviation in the machining of slender bolts and improve the accuracy and quality of the machined holes, it is necessary to design a device that is simple in structure, accurate in positioning, highly versatile, and can effectively solve the hole deviation problem. This device should ensure better consistency of the bolt in the blank state and avoid hole deviation caused by the loose block shaking or head slippage, which would lead to a deterioration of the blank. Utility Model Content

[0005] The technical problem to be solved by this utility model is how to solve the problem of hole deviation in the machining of slender bolts and improve the accuracy and quality of the machining holes of slender bolts. In view of the existing technical problems, a slotted movable block mold device for machining slender bolts is provided.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a slotted movable block mold device for processing slender bolts, including a mold body, a movable block, and a positioning pin. The mold body includes a first side mold body and a second side mold body arranged opposite to each other. The movable block is disposed on the first side mold body, and a positioning groove is formed in the middle of the movable block. The positioning pin is fixed on the second side mold body, and the shape and size of the positioning pin match the positioning groove. The positioning pin is inserted into the positioning groove.

[0007] Optionally, the positioning groove is a rectangular groove with a depth of 1 / 4 of the thickness of the movable block.

[0008] Optionally, the material of the live block is HT300.

[0009] Optionally, the first side mold body is provided with a limiting groove that matches the outer contour of the movable block, and the movable block and the first side mold body are fixed through the gap fit of the limiting groove.

[0010] Compared with the prior art, the beneficial effects of this utility model include: a slotted movable block mold device for machining slender bolts, consisting of a mold body, a movable block, and a positioning pin, has a simple overall structure. The mold body includes a first side mold body and a second side mold body arranged opposite to each other. The movable block is set on the first side mold body, and a positioning groove is formed in the middle of the movable block. The positioning pin is fixed on the second side mold body. The shape and size of the positioning pin match the positioning groove. The matching design of the positioning pin and the positioning groove forms a bidirectional positioning, which improves the stability of the movable block during the mold closing process and prevents the movable block from shaking or tilting. The positioning pin is inserted into the positioning groove. When the mold is closed, the positioning pin is precisely inserted into the positioning groove of the movable block to form a positioning fit, which restricts the displacement of the movable block in the mold closing direction and the horizontal direction, avoiding deviation of the machining hole position of the slender bolt due to shaking or displacement, and realizing the precise positioning of the movable block in the mold body. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings.

[0012] Figure 1 This invention relates to a schematic diagram of the mold body structure on one side of a slotted movable block mold device for machining slender bolts, as described in an embodiment of the present invention.

[0013] Figure 2 : A schematic diagram of the first side mold body structure of a slotted movable block mold device for processing slender bolts in an embodiment of this utility model;

[0014] Figure 3: A schematic diagram of the movable block structure of a slotted movable block mold device for processing slender bolts in an embodiment of this utility model;

[0015] Figure 4 : A schematic diagram of the second side mold body structure of a slotted movable block mold device for processing slender bolts in an embodiment of this utility model;

[0016] Among them, 1. First side mold body; 2. Second side mold body; 3. Movable block; 4. Positioning pin; 5. Positioning groove; 6. Limiting groove. Detailed Implementation

[0017] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0018] It should be noted that the Z-axis in the attached figures represents the vertical direction, i.e., the up-down position, with the positive direction of the Z-axis representing upward and the negative direction representing downward; the Y-axis in the attached figures represents the horizontal direction and is designated as the front-back position, with the positive direction of the Y-axis representing the front and the negative direction representing the back; the X-axis in the attached figures represents the left-right position, with the positive direction of the X-axis representing the right and the negative direction representing the left. It should also be noted that the aforementioned representations of the Z, Y, and X axes 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.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] In the related technologies, in the field of hot core box coated sand core making technology in casting, the problem of bolt machining hole deviation is more prominent. In the positioning of the movable block, if the positioning of the movable block is not accurate, shaking and head drop are likely to occur during the core making process. The traditional positioning method of movable block and mold is simple and lacks a precise positioning structure, which leads to the unstable position of the movable block in the mold, resulting in poor consistency of bolt blanks. During subsequent processing, the hole position is likely to deviate from the design position.

[0022] To solve the above problems, an embodiment of the present invention provides a slotted movable block (3) mold device for processing slender bolts, including a mold body, a movable block (3), and a positioning pin (4). The mold body includes a first side mold body (1) and a second side mold body (2) arranged opposite to each other. The movable block (3) is disposed on the first side mold body (1). A positioning groove (5) is opened in the middle of the movable block (3). The positioning pin (4) is fixed on the second side mold body (2). The shape and size of the positioning pin (4) match the positioning groove (5). The positioning pin (4) is inserted into the positioning groove (5).

[0023] In this embodiment, as Figures 1 to 4 As shown, in order to improve the positioning accuracy of the movable block (3) and simplify the device structure, the mold body, the movable block (3), and the positioning pin (4) constitute a slotted movable block (3) mold device for processing slender bolts. The overall structure is simple. The mold body includes a first side mold body (1) and a second side mold body (2) arranged opposite to each other. The movable block (3) is set on the first side mold body (1). A positioning groove (5) is opened in the middle of the movable block (3). The positioning pin (4) is fixed on the second side mold body (2). The shape and size of the positioning pin (4) are the same as the positioning pin (5). The matching groove (5) and the matching design of the positioning pin (4) and the positioning groove (5) form a two-way positioning, which improves the stability of the movable block (3) during the mold closing process and prevents the movable block (3) from shaking or tilting; the positioning pin (4) is inserted into the positioning groove (5). When the mold is closed, the positioning pin (4) is precisely inserted into the positioning groove (5) of the movable block (3) to form a positioning fit, which restricts the displacement of the movable block (3) in the mold closing direction and horizontal direction, avoids deviation of the machining hole position of the slender bolt due to shaking or displacement, and realizes the precise positioning of the movable block (3) in the mold body.

[0024] Optionally, the positioning groove (5) is a rectangular groove with a depth of 1 / 4 of the thickness of the movable block (3).

[0025] In this optional embodiment, such as Figure 3 As shown, in order to ensure the stability of the locating pin (4) after insertion and to ensure the strength of the movable block (3), a locating groove (5) is provided in the middle of the movable block (3). The locating groove (5) is designed as a rectangular groove, and the depth is controlled at 1 / 4 of the thickness of the movable block (3), which facilitates machining and does not affect the structural strength of the movable block (3).

[0026] Optionally, the material of the live block (3) is HT300.

[0027] In this optional embodiment, such as Figure 3 As shown, in order to improve the service life of the device, the material of the movable block (3) is HT300, which improves the high temperature resistance and wear resistance of the movable block (3) and reduces mold wear.

[0028] Optionally, the first side mold body (1) is provided with a limiting groove (6) that matches the outer contour of the movable block (3), and the movable block (3) and the first side mold body (1) are fixed by the gap fit of the limiting groove (6).

[0029] In this optional embodiment, such as Figure 2 As shown, the first mold body (1) is provided with a limiting groove (6) that matches the outer contour of the movable block (3). The movable block (3) is fixed to the first mold body (1) with a clearance fit through the limiting groove (6). The first mold body (1) is provided with a limiting groove (6) that matches the bottom outer contour of the movable block (3). The movable block (3) is fixed to the first mold body (1) with a clearance fit through the limiting groove (6). This design allows the movable block (3) to be quickly installed on the mold body. At the same time, the contour constraint of the limiting groove (6) prevents the movable block (3) from shaking or tilting during the opening and closing of the mold.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slotted movable block mold device for machining slender bolts, characterized in that: The mold includes a mold body, a movable block, and a positioning pin. The mold body includes a first side mold body and a second side mold body arranged opposite to each other. The movable block is disposed on the first side mold body and has a positioning groove in the middle. The positioning pin is fixed on the second side mold body. The shape and size of the positioning pin match the positioning groove and the positioning pin is inserted into the positioning groove.

2. The slotted movable block mold device for machining slender bolts as described in claim 1, characterized in that: The positioning groove is a rectangular groove with a depth of 1 / 4 of the thickness of the movable block.

3. The slotted movable block mold device for machining slender bolts as described in claim 1, characterized in that: The material of the movable block is gray cast iron HT300.

4. The slotted movable block mold device for machining slender bolts as described in claim 1, characterized in that: The first side mold body is provided with a limiting groove that matches the outer contour of the movable block, and the movable block is fixed to the first side mold body through the gap fit of the limiting groove.

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