A lost foam cavity polishing device

Abstract

A lost foam casting cavity polishing device, relating to the field of lost foam casting technology, includes a base, a vertical mounting plate, a polishing device, and a positioning device. The base has a structure with a vertical mounting plate at the top. The polishing device is mounted on the mounting plate and used to polish the cavities of the lost foam casting mold for bucket teeth. The positioning device is mounted on the base and used to position the bucket tooth mold. The polishing device includes a polishing rod that slides vertically with the mounting plate, a polishing head mounted at the bottom of the polishing rod, a cam mechanism located at the top of the polishing rod, and a motor mounted on the side of the mounting plate opposite to the cam mechanism. The cam mechanism includes a cam, a limiting block, and a tension spring. The cam rotation shaft is driven and connected to the motor, and the tension spring ensures that the top end of the polishing rod is always in contact with the cam. This invention, through the structural design of the base, polishing device, positioning device, and mounting plate, achieves an efficient solution for polishing the cavities of the bucket tooth mold, possessing stability and accuracy, and meeting diverse polishing needs.

Description

Technical Field

[0001] This utility model relates to the field of lost foam technology, and in particular to a device for polishing the cavities of lost foam. Background Technology

[0002] After the lost foam casting white mold is blown into shape using a molding machine and dried in an oven, it needs to be sanded and finished. This step aims to remove minor burrs, seams, and other defects from the white mold surface, improving its smoothness and ensuring better adhesion of the paint during the dipping process. Sanding is typically done manually using fine sandpaper. For sanding the white mold of excavator or loader bucket teeth, there are generally no major problems.

[0003] However, grinding cavities often presents numerous challenges. On one hand, the grinding process is slow and time-consuming; on the other hand, uneven force applied by operators can easily cause the cavity to shift from a circular shape to an irregular structure, resulting in lateral or front-back misalignment. This can lead to deviations in the center distance of the casting holes during subsequent pattern casting, and even prevent pins and bolts from passing through. The finishing work on the castings is extremely tedious, and some castings are scrapped due to irreparability, causing significant losses to the company. Therefore, there is an urgent need for a new type of lost foam casting cavity grinding device to replace manual grinding, thereby improving grinding efficiency and precision. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a device for polishing the cavity of lost foam casting.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A lost foam casting cavity polishing device, comprising:

[0007] The base has a vertical support at its top.

[0008] The mounting plate is vertically installed on one side of the top of the base;

[0009] A grinding device, mounted on a mounting plate, is used to grind the cavities of the white mold for bucket teeth;

[0010] A positioning device, installed on the base, is used to position the white mold of the bucket teeth;

[0011] The polishing device includes:

[0012] The grinding rod slides vertically with the mounting plate.

[0013] The grinding head is mounted at the bottom of the grinding rod;

[0014] A cam mechanism, located at the top of the grinding rod and mounted on the mounting plate, is used to drive the grinding rod to move vertically and linearly back and forth.

[0015] The motor is mounted on the side of the mounting plate away from the cam mechanism and is used to drive the cam mechanism.

[0016] Preferably, the mounting plate is provided with a connecting plate; the grinding rod moves vertically through the connecting plate.

[0017] Preferably, the cam mechanism includes:

[0018] The cam has its rotation axis moving through the mounting plate and connected to the motor drive; the outer surface of the cam has a sliding groove that matches the top of the grinding rod.

[0019] A limiting block is installed on the grinding rod body, and the limiting block is located below the connecting plate;

[0020] A tension spring is sleeved on the grinding rod body located between the connecting plate and the limiting block; the top of the tension spring is hooked to the connecting plate and the bottom is hooked to the limiting block; it is used to ensure that the top end of the grinding rod is always in corresponding contact with the cam.

[0021] Preferably, the limiting block is provided with two connecting rods spaced apart on one side of the mounting plate; the mounting plate is provided with a slide rail at the position of the connecting rod, and the connecting rod slides in a corresponding sliding fit with the slide rail.

[0022] Preferably, the positioning device includes:

[0023] Dovetail groove, located on the base;

[0024] The slider slides in a corresponding dovetail groove; the top of the slider is provided with a mounting post, and the top of the mounting post is provided with a threaded hole that penetrates the slider vertically.

[0025] The positioning sleeve is fitted onto the mounting post of the slider and is matched with the positioning hole of the white mold of the bucket tooth.

[0026] The locking bolt is threadedly connected to the threaded hole of the slider, and the bottom of the locking bolt can abut against the bottom of the dovetail groove. It is used to limit the positioning sleeve and lock the slider.

[0027] Preferably, a scale is provided on one side of the dovetail groove, and a pointer corresponding to the scale is provided on the slider mounting post.

[0028] Preferably, the positioning device further includes:

[0029] There are two limiting plates, which are respectively located on both sides of the dovetail groove; the bottom of the limiting plate slides in accordance with the base.

[0030] The double helix screw is rotatably connected to the base; the bottom of the limiting plate is threadedly connected to the double helix screw, and the threads of the double helix screw and the two limiting plates are opposite in direction; the two limiting plates are driven to move away from or closer to each other by turning the double helix screw.

[0031] Preferably, the top of the grinding rod is provided with a ball head structure that corresponds to and matches the cam groove.

[0032] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0033] (1) This utility model achieves an efficient grinding solution for the cavity of the white mold of the bucket teeth through the structural design of the base, grinding device, positioning device and mounting plate. The base serves as the mounting foundation and is closely connected to the vertically set mounting plate, providing a stable support structure for the entire device. The mounting plate is equipped with a grinding device specifically for grinding operations, making the grinding operation more precise and stable. The effective technical effect of this overall structural design is that it organically combines the various key components together, ensuring the stability and accuracy of the grinding process, and providing a basic guarantee for high-quality cavity grinding. In particular, the grinding quality of the deeper cavities of the white mold of the bucket teeth is significantly better than that of manual grinding.

[0034] (2) The connecting plate of this utility model provides precise guidance for the vertical sliding of the grinding rod, ensuring the accuracy of the linear motion of the grinding head during operation. The grinding head and the grinding rod are detachably connected. This design greatly improves the versatility and flexibility of the device, and allows for quick replacement of the appropriate grinding head according to different specifications of the bucket tooth white mold, meeting diverse grinding needs.

[0035] (3) The ingenious use of the cam mechanism in this utility model is another major technical highlight of the device. The motor drives the cam to rotate, and through the interaction between the cam and the top of the grinding rod, the vertical reciprocating movement of the grinding rod is realized. This motion conversion mechanism is not only stable in operation, but also can accurately control the movement trajectory of the grinding head, thereby improving the grinding quality and efficiency.

[0036] (4) This utility model features a dovetail groove on the base, within which a slider slides. The mounting post at the top of the slider is used to install a positioning sleeve that matches the positioning hole of the bucket tooth mold. This structure allows the positioning sleeve to be quickly inserted into the positioning hole of the bucket tooth mold, achieving rapid positioning of the workpiece. Simultaneously, the locking bolt design ensures that the positions of the slider and positioning sleeve are fixed during batch grinding of workpieces of the same specification, guaranteeing the consistency and stability of the grinding operation. The combination of the scale and pointer further optimizes the function of the positioning device, enabling quick and accurate adjustment of the positioning sleeve's position when changing bucket tooth molds of different specifications, greatly improving the adaptability and work efficiency of the device. The structural design of the limit plate and double helix screw provides additional stability assurance for the grinding operation. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of this utility model;

[0039] Figure 3 This is a top view of the present invention;

[0040] Figure 4 This is a schematic diagram of the grinding device.

[0041] Figure 5 This is a schematic diagram of the positioning device.

[0042] In the diagram: 1. Base; 2. Grinding device; 2-1. Grinding rod; 2-2. Grinding head; 2-3. Motor; 2-4. Connecting plate; 2-5. Cam; 2-6. Limiting block; 2-7. Tension spring; 2-8. Connecting rod; 3. Positioning device; 3-1. Dovetail groove; 3-2. Slider; 3-3. Positioning sleeve; 3-4. Locking bolt; 3-5. Ruler; 3-6. Pointer; 3-7. Limiting plate; 3-8. Double helix screw; 4. Mounting plate. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0044] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Example 1:

[0047] Combined with appendix Figures 1-4 A lost foam casting cavity polishing device includes a base 1, a polishing device 2, a positioning device 3, and a mounting plate 4. The base 1 serves as the mounting foundation for the entire device and is tightly connected to the vertically arranged mounting plate 4. The mounting plate 2 is equipped with a polishing device 2 specifically designed for polishing the cavities of the lost foam casting mold.

[0048] In detail, as shown in Figure 4, the grinding device 2 mainly consists of a grinding rod 2-1, a grinding head 2-2, and a cam mechanism. The grinding rod 2-1 and the mounting plate 4 are in a vertical sliding fit. Specifically, a connecting plate 2-4 perpendicular to the mounting plate 4 is provided, and the grinding rod 2-1 moves vertically through the connecting plate 2-4, forming a vertical sliding fit between the two, thus providing precise guidance for the vertical reciprocating movement of the grinding rod 2-1. The grinding head 2-2 is assembled at the bottom of the grinding rod 2-1, and the grinding head 2-2 is detachably connected to the grinding rod 2-1. This design facilitates the replacement of the appropriate grinding head 2-2 according to different specifications of the tooth mold, thereby meeting diverse grinding needs.

[0049] A cam mechanism is provided at the top of the grinding rod 2-1. This cam mechanism is mounted on the mounting plate 4 and its main function is to drive the grinding rod 2-1 to move linearly and reciprocally in the vertical direction. On the side of the mounting plate 4 opposite to the cam mechanism, a motor 2-3 is installed to drive the cam mechanism.

[0050] Further analysis reveals that the cam mechanism comprises a cam 2-5, a limiting block 2-6, and a tension spring 2-7. The rotation axis of the cam 2-5 passes through the mounting plate 4 and forms a drive connection with the motor 2-3. A groove is designed on the outer surface of the cam 2-5 to match the top of the grinding rod 2-1. When the motor 2-3 starts and drives the cam 2-5 to rotate, the cam 2-5 presses down on the grinding rod 2-1 during its rotation.

[0051] A limiting block 2-6 is installed on the shaft of the grinding rod 2-1, and the limiting block 2-6 is located below the connecting plate 2-4. A tension spring 2-7 is fitted onto the shaft portion of the grinding rod 2-1 between the connecting plate 2-4 and the limiting block 2-6. The top of the tension spring 2-7 is engaged with the connecting plate 2-4, and the bottom is engaged with the limiting block 2-6. Its function is to ensure that the top end of the grinding rod 2-1 always maintains corresponding contact with the cam 2-5. Through the coordinated action of the cam 2-5 and the tension spring 2-7, the grinding rod 2-1 is driven to move up and down reciprocally, which in turn drives the grinding head 2-2 to move up and down synchronously, ultimately achieving the grinding operation of the cavity of the bucket tooth mold.

[0052] Furthermore, the limiting block 2-6 has two connecting rods 2-8 spaced apart on one side of the mounting plate 4. On the mounting plate 4, a slide rail is provided at the position corresponding to the connecting rod 2-8, and the connecting rod 2-8 slides in a sliding fit with the corresponding slide rail. This design effectively improves the stability of the grinding rod 2-1 during movement, thereby improving the accuracy of the grinding operation. In addition, a ball joint structure matching the slide groove of the cam 2-5 is designed at the top of the grinding rod 2-1. This design significantly reduces the friction between the grinding rod 2-1 and the slide groove of the cam 2-5, thereby improving the smoothness of the cam mechanism and the operation of the grinding rod 2-1.

[0053] A positioning device 3 is also installed on the base 1 for positioning the white mold of the bucket teeth. During actual operation, the positioning device 3 precisely positions the white mold of the bucket teeth, allowing the grinding head 2-2 to be accurately inserted into the cavity of the mold. Then, the motor 2-3 is started, driving the cam mechanism to move, which in turn moves the grinding head 2-2 up and down, thus performing the grinding operation on the cavity of the white mold of the bucket teeth. It is worth mentioning that by changing the grinding heads 2-2 from small to large, the cavity of the white mold of the bucket teeth can be gradually ground to the required size and fineness; or, in batch grinding operations, multiple lost foam casting cavity grinding devices can be used, with grinding heads 2-2 of progressively larger sizes installed on these devices, to perform a streamlined, one-by-one grinding operation, thereby further improving the efficiency of the grinding operation.

[0054] Example 2:

[0055] Referring to Figures 1 to 5, another lost foam casting cavity grinding device is shown, which improves upon the design of the positioning device 3 in Embodiment 1. Specifically, the positioning device 3 includes a dovetail groove 3-1 disposed on the base 1. A slider 3-2 is slidably fitted within the dovetail groove 3-1. The top of the slider 3-2 is designed with a mounting post, and a threaded hole extending vertically through the slider 3-2 is formed at the top of the mounting post. A positioning sleeve 3-3, adapted to the positioning hole of the white mold for the bucket teeth, is fitted onto the mounting post of the slider 3-2. When positioning the white mold for the bucket teeth, the positioning sleeve 3-3 can be inserted into the positioning hole of the white mold for the bucket teeth, thereby achieving rapid positioning of the white mold for the bucket teeth.

[0056] A locking bolt 3-4 is threaded into the threaded hole of slider 3-2. The bottom of the locking bolt 3-4 abuts against the bottom of the dovetail groove 3-1, thereby limiting and locking the positioning sleeve 3-3 and slider 3-2. When grinding the same specification of bucket tooth white mold, tightening the locking bolt 3-4 ensures that the bottom of the locking bolt 3-4 is in close contact with the bottom of the dovetail groove 3-1, while ensuring a tight fit between slider 3-2 and dovetail groove 3-1. This guarantees that the position of positioning sleeve 3-3 remains fixed, facilitating continuous grinding operations.

[0057] Further design optimization includes a scale 3-5 on one side of the dovetail groove 3-1, and a pointer 3-6 corresponding to the scale 3-5 on the mounting post of the slider 3-2. When grinding different specifications of bucket tooth molds, the position of the positioning sleeve 3-3 can be quickly adjusted according to the alignment of the pointer 3-6 and the scale 3-5, ensuring that the cavities of different specifications of bucket tooth molds can be accurately aligned with the grinding head 2-2, thereby effectively improving the efficiency of the grinding operation.

[0058] In addition, the positioning device 3 also includes a limiting plate 3-7 and a double helical screw 3-8, as shown in Figure 5. There are two limiting plates 3-7, located on both sides of the dovetail groove 3-1. The bottom of the limiting plate 3-7 is in sliding fit with the base 1. On the base 1, a slot perpendicular to the length axis of the dovetail groove 3-1 is provided corresponding to the position of the limiting plate 3-7, and the bottom of the limiting plate 3-7 extends into the slot. The double helical screw 3-8 is rotatably connected to the base 1, and the plate part of the limiting plate 3-7 extending into the slot is threadedly connected to the double helical screw 3-8, and the threads of the double helical screw 3-8 and the two limiting plates 3-7 are opposite in direction. By turning the double helical screw 3-8, the two limiting plates 3-7 can be driven to move away from or towards each other. When grinding the white mold of the bucket teeth, the white mold of the bucket teeth is clamped by two limiting plates 3-7, which can effectively limit the position of the white mold of the bucket teeth and prevent the white mold of the bucket teeth from moving randomly during the grinding process. This prevents large errors in grinding due to workpiece displacement and ensures the accuracy and quality of the grinding operation.

[0059] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. An evaporative pattern cavity finishing apparatus, comprising: include: The base (1) has a vertical top; Mounting plate (4) is vertically mounted on one side of the top of base (1); The grinding device (2) is installed on the mounting plate (4) and is used to grind the cavity of the white mold of the bucket teeth; Positioning device (3), installed on base (1), is used to position the white mold of the bucket teeth; The polishing device (2) includes: The grinding rod (2-1) slides vertically with the mounting plate (4); The grinding head (2-2) is installed at the bottom of the grinding rod (2-1); A cam mechanism is located on the top of the grinding rod (2-1) and mounted on the mounting plate to drive the grinding rod (2-1) to move vertically and linearly back and forth. The motor (2-3) is mounted on the side of the mounting plate (4) away from the cam mechanism and is used to drive the cam mechanism.

2. The lost foam casting cavity polishing device as described in claim 1, characterized in that: The mounting plate (4) is provided with a connecting plate (2-4); the grinding rod (2-1) vertically moves through the connecting plate (2-4).

3. The lost foam cavity polishing apparatus of claim 2, wherein, The cam mechanism includes: The cam (2-5) has its rotation axis moving through the mounting plate (4) and connected to the motor (2-3) for drive; the outer surface of the cam (2-5) is provided with a sliding groove that corresponds to and matches the top of the grinding rod (2-1); The limiting block (2-6) is installed on the body of the grinding rod (2-1), and the limiting block (2-6) is located below the connecting plate (2-4); A tension spring (2-7) is sleeved on the grinding rod (2-1) between the connecting plate (2-4) and the limiting block (2-6); the top of the tension spring (2-7) is hooked to the connecting plate (2-4) and the bottom is hooked to the limiting block (2-6); it is used to ensure that the top end of the grinding rod (2-1) is always in corresponding contact with the cam (2-5).

4. The lost foam casting cavity polishing device as described in claim 3, characterized in that: The limiting block (2-6) is provided with two connecting rods (2-8) spaced apart on one side of the mounting plate (4); the mounting plate (4) is provided with a slide rail at the position of the connecting rod (2-8), and the connecting rod (2-8) slides in accordance with the corresponding slide rail.

5. The lost foam cavity polishing apparatus of claim 1, wherein: The positioning device (3) includes: Dovetail groove (3-1) is provided on base (1); The slider (3-2) is slidably fitted with the dovetail groove (3-1); the top of the slider (3-2) is provided with a mounting post, and the top of the mounting post is provided with a threaded hole that vertically penetrates the slider (3-2); The positioning sleeve (3-3) is fitted onto the mounting post of the slider (3-2), and it is matched with the positioning hole of the white mold of the bucket tooth. The locking bolt (3-4) is threadedly connected to the threaded hole of the slider (3-2), and the bottom of the locking bolt (3-4) can abut against the bottom of the dovetail groove (3-1) to limit the positioning sleeve (3-3) and lock the slider (3-2).

6. The lost foam casting cavity polishing device as described in claim 5, characterized in that: A scale (3-5) is provided on one side of the dovetail groove (3-1), and a pointer (3-6) corresponding to the scale (3-5) is provided on the mounting post of the slider (3-2).

7. The lost foam cavity polishing apparatus of claim 5 or 6, wherein, The positioning device (3) further includes: There are two limiting plates (3-7), which are respectively located on both sides of the dovetail groove (3-1); the bottom of the limiting plate (3-7) is slidably engaged with the base (1); The double helix screw (3-8) is rotatably connected to the base (1); the bottom of the limiting plate (3-7) is threadedly connected to the double helix screw (3-8), and the threads of the double helix screw (3-8) and the two limiting plates (3-7) are opposite in direction; by turning the double helix screw (3-8), the two limiting plates (3-7) are driven to move away from or closer to each other.

8. The lost foam casting cavity polishing device as described in claim 2, characterized in that: The top of the grinding rod (2-1) is provided with a ball head structure that corresponds to and matches the groove of the cam (2-5).

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