Lost foam fixing device

Abstract

The utility model relates to the technical field of fixing devices, in particular to an evanescent mode fixing device. The fixing device comprises a fixing mechanism capable of being inserted into an inner cavity of a butt joint pipe from a main pipe body of an evanescent mode main body, a fixing assembly capable of generating reciprocating motion along the inner cavity of the butt joint pipe is arranged at the inserting end of the fixing mechanism, and an inner supporting piece capable of moving in the radial direction of the butt joint pipe and abutting against the inner wall of the butt joint pipe is arranged at the telescopic end of the fixing assembly. According to the utility model, the inner cavity of the butt joint pipe can be supported, and the deformation of the evanescent mode main body in the clamping and bonding process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fixing device technology, specifically a lost foam fixing device. Background Technology

[0002] Lost foam casting, also known as solid casting, is a new type of casting method that uses foam plastic molds with binder-free dry sand combined with vacuum technology. It involves bonding and assembling foam models similar in size and shape to the casting into a model cluster, brushing on refractory coating and drying it, then embedding it in dry quartz sand and vibrating it to shape it. Under negative pressure, it is poured, causing the model to vaporize, the liquid metal to occupy the model's position, and after solidification and cooling, a new casting method is formed.

[0003] like Figure 5 The lost foam body 10 shown is a type of foam model. At least one end of its connecting pipe 11 is a mating end, used for bonding and assembling with other lost foam pipes or parts. A main body pipe 12 is also connected to the side wall of the connecting pipe 11. The process of bonding and assembling this type of foam model into a model cluster mostly employs automated bonding. In practice, after the lost foam body 10 is fixed by a fixing device, a robotic arm moves the lost foam pipes or parts to the mating end with the connecting pipe 11 for bonding. Specifically, the lost foam body 10 is mostly fixed using an external clamping method. For example, as described in the text of Chinese Patent Publication No. CN214661331U entitled "A Bonding Machine for Lost Foam Casting," a cylinder-driven stop is used to clamp the lost foam from the outside, thus fixing the lost foam by external clamping during the bonding process. However, since the main body 10 of the lost foam is made of foam material that is easily deformed by pressure, the traditional external clamping method does not provide sufficient support for the inner cavity of the connecting tube 11 in the main body 10 of the lost foam. During the clamping and bonding compression process, the mating end of the connecting tube 10 is easily deformed, so this problem needs to be solved. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, this utility model provides a lost foam fixing device that can support the inner cavity of the connecting pipe and reduce the deformation of the lost foam body during the clamping and bonding process.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A lost foam casting fixing device includes a fixing mechanism that can be inserted into the inner cavity of a connecting tube by the main tube of the lost foam casting body. The insertion end of the fixing mechanism has a fixing component that can reciprocate along the inner cavity of the connecting tube. The telescopic end of the fixing component is provided with an inner support member that can move radially along the connecting tube and abut against the inner wall of the connecting tube.

[0007] As a further embodiment of this utility model: the fixing component includes a support plate that can reciprocate along its own axis. When the support plate is located in the inner cavity of the connecting pipe, it is coaxially distributed with the connecting pipe. The support plate constitutes the telescopic end of the fixing component. The inner support member slides on the outer edge of the support plate in the radial direction, and the inner support member is configured as a plurality of members evenly distributed around the axis of the support plate.

[0008] As a further embodiment of this utility model: a rotating disk is coaxially mounted on the support plate, and a number of driving oblique holes matching the number of inner support members are eccentrically arranged on the rotating disk. All driving oblique holes are arranged in a spiral pattern. Each inner support member is fixed with a connecting rod that is inserted into the corresponding driving oblique hole. A motor assembly for driving the rotating disk to rotate is provided on the support plate.

[0009] As a further embodiment of this utility model: the inner support member is T-shaped, the connecting rod is arranged at the end of the T-shaped structure, the middle section side wall of the T-shaped structure forms a slide rail guide fit with the support plate, and the front section surface wall of the T-shaped structure is arc-shaped, so that when the inner support member is in the outward sliding unfolded state, the surface walls of all the T-shaped structures are combined to form a circular structure that matches the inner diameter of the connecting pipe.

[0010] As a further embodiment of this utility model: the fixing mechanism includes a support column, and a power component is provided on the support column for driving the fixing component to generate the reciprocating motion on the support column.

[0011] As a further embodiment of this utility model: a guide post for sliding guidance of the support disk is fixed on the support disk, the guide post is parallel to the axis of the support disk, the power component includes a rack connected to the fixed component, the length direction of the rack is parallel to the sliding direction of the fixed component, a drive motor is installed on the support post, and a drive gear meshing with the rack is installed on the output shaft of the drive motor.

[0012] As a further embodiment of this utility model: the fixing components are configured as two sets arranged coaxially, the driving gear is located between the two sets of fixing components, and the racks on both sets of fixing components mesh with the driving gear for transmission.

[0013] As a further improvement of this utility model: a guide member is fixed on the fixing mechanism. The guide member is used to guide the fixing mechanism to slide on the lost foam body so that the fixing component slides to the inner cavity of the connecting pipe according to a predetermined path and angle.

[0014] As a further improvement of this utility model: the guide member is a guide groove, the cavity of which matches the ribs inside the main pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The main body of the lost foam casting body is inserted into the inner cavity of the connecting pipe via a fixing mechanism. The fixing component at the insertion end of the fixing mechanism moves along the inner cavity of the connecting pipe to its opening. An inner support member, which can move radially along the connecting pipe, abuts against the inner wall of the connecting pipe at the telescopic end of the fixing component. By pressing the inner wall of the connecting pipe from the inside out through the inner support member, the connecting pipe is fixed while also providing stable support to the inner wall of the connecting pipe opening, effectively reducing the deformation of the connecting pipe during bonding and fixing.

[0017] 2. The inner support member slides along the radial direction of the support plate on the outer edge of the support plate, and the inner support member is set to be a number of evenly distributed around the axis of the support plate, so that the extrusion end of the inner support member can be evenly distributed on the inner wall of the support plate, so as to uniformly extrude the inner wall of the connecting pipe.

[0018] 3. The motor assembly drives the rotating disk to rotate, which in turn drives all the vortex-shaped drive oblique holes to move synchronously. The inner cavity of the drive oblique holes generates a component force along the axis of the support disk on the connecting rod, thereby driving all the inner support components to expand outward or retract inward synchronously along the axis of the support disk. This not only ensures the synchronicity of the support disk's movement, but also eliminates the need for multiple power sources, effectively reducing costs.

[0019] 4. The inner support member has a T-shaped structure, with the front section of the T-shaped structure having an arc-shaped surface. When the inner support member is in its outward sliding unfolded state, the surfaces of all the T-shaped structures combine to form a circular structure that matches the inner diameter of the connecting pipe. Therefore, when the inner support member is fixed to the connecting pipe, the contact area between the inner support member and the connecting pipe has the same curvature as the inner wall of the connecting pipe, reducing the deformation of the connecting pipe caused by the contact with the inner support member.

[0020] 5. The fixing mechanism includes a support column, which facilitates the insertion of the fixing component from the main body into the inner cavity of the connecting pipe. Furthermore, a power component is installed on the support column, which can automatically drive the fixing component to produce reciprocating motion.

[0021] 6. The method of using a drive gear and rack to drive the support plate to generate reciprocating motion has the advantages of stable transmission and large transmission stroke.

[0022] 7. The fixing components are arranged in two coaxial sets, which can achieve synchronous internal support and fixation of both ends of the connecting pipe. In addition, the drive gear is located between the two sets of fixing components, and the racks on both sets of fixing components mesh with the drive gear for transmission. This allows one drive gear to drive two racks to achieve synchronous reciprocating motion, effectively reducing the cost of the device.

[0023] 8. The fixing mechanism is equipped with guide components to allow the fixing components to slide into the inner cavity of the connecting pipe according to a predetermined path and angle; ensuring that the fixing components can move accurately to the predetermined position in the inner cavity of the connecting pipe at a predetermined angle, and ultimately achieve stable internal support and fixing of the inner cavity of the connecting pipe.

[0024] 9. The guide component is a guide groove, the cavity of which matches the ribs inside the main pipe. These ribs are an integral structure within the main pipe of the lost foam body. The guide component cleverly utilizes the ribs to achieve guidance, resulting in a sophisticated structure that eliminates the need for external structures to achieve positioning between the fixing mechanism and the lost foam body. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the connection structure between the present invention and the lost foam body.

[0026] Figure 2 This is a schematic diagram of the structure of this utility model.

[0027] Figure 3 This is a schematic diagram of the connection structure between the fixing component and the support column in this utility model.

[0028] Figure 4 This is a schematic diagram of the fixing component in this utility model.

[0029] Figure 5 This is a schematic diagram of the existing disappearing membrane structure.

[0030] In the diagram: 10. Lost foam body; 11. Connecting pipe; 12. Main pipe; 121. Rib; 20. Fixing component; 21. Internal support component; 211. Linkage rod; 22. Guide column; 23. Support plate; 24. Turning plate; 241. Drive oblique hole; 25. Motor assembly; 30. Support column; 31. Guide component; 41. Drive motor; 42. Drive gear; 43. Rack. Detailed Implementation

[0031] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] For ease of understanding, the specific structure and working method of this utility model are further described below with reference to the accompanying drawings:

[0033] The specific structure of this utility model is as follows: Figure 1-5 As shown, its main structure includes a fixing mechanism that allows the main pipe body 12 of the lost foam casting body 10 to be inserted into the inner cavity of the connecting pipe 11. The insertion end of this fixing mechanism has a fixing component 20 that can reciprocate along the inner cavity of the connecting pipe 11. Specifically, the direction of movement and the extension / retraction length of the fixing component 20 are determined by the pipe layout between the connecting pipe 11 and the main pipe body 12. Figure 5The lost foam casting body 10 shown has a connecting tube 11 and a main tube 12 perpendicularly distributed. In use, the fixing mechanism is preferably inserted axially into the inner cavity of the connecting tube 11 from the main tube 12, and the fixing component 20 preferably reciprocates along the axial direction of the connecting tube 11. Of course, the fixing mechanism and the fixing component 20 can also be arranged to intersect the axial direction of the main tube 12 and the axis of the connecting tube 11, respectively, so that the telescopic end of the fixing component 20 can move to the opening of the connecting tube 11. In addition, the telescopic end of the fixing component 20 is provided with an inner support member 21 that can move radially along the connecting tube 11 and abut against the inner wall of the connecting tube 11. By pressing the inner wall of the connecting tube 11 from the inside out through the inner support member 21, the connecting tube 11 is fixed while the inner wall of the opening of the connecting tube 11 is stably supported, effectively reducing the deformation of the connecting tube 11 during the bonding and fixing process.

[0034] Based on the above, such as Figure 4 As shown, the fixing component 20 includes a support plate 23 that can reciprocate along its own axis. When located inside the cavity of the connecting pipe 11, the support plate 23 is coaxially distributed with the connecting pipe 11. The support plate 23 constitutes the telescopic end of the fixing component 20, that is, the support plate 23, as the telescopic end of the fixing component 20, performs a coaxial reciprocating motion inside the cavity of the connecting pipe 11. Furthermore, based on the above, the inner support member 21 slides along the radial direction of the support plate 23 on the outer edge of the support plate 23, and the inner support member 21 is configured as several evenly distributed around the axis of the support plate 23, so that the pressing end of the inner support member 21 can be evenly distributed on the inner wall of the support plate 23 to uniformly press the inner wall of the connecting pipe 11. Of course, in actual implementation, the telescopic end of the fixing component 20 can also adopt a regular polygonal plate structure.

[0035] Furthermore, a rotating disk 24 is coaxially mounted on the support disk 23. The rotating disk 24 has several eccentrically arranged drive oblique holes 241, matching the number of inner support members 21. All drive oblique holes 241 are arranged in a spiral pattern. Each inner support member 21 is fixed with a connecting rod 211 that is inserted into the corresponding drive oblique hole 241. The support disk 23 is equipped with a motor assembly 25 for driving the rotating disk 24 to rotate. In use, the motor assembly 25 drives the rotating disk 24 to rotate, thereby causing all the spiral-shaped drive oblique holes 241 to move synchronously. The inner cavity of the drive oblique holes 241 generates a component force along the axial direction of the support disk 23 on the connecting rod 211, thus driving all the inner support members 21 to synchronously expand outward or retract inward along the axial direction of the support disk 23. This not only ensures the synchronicity of the movement of the support disk 23 but also eliminates the need for multiple power sources, effectively reducing costs. Of course, in actual implementation, the inner support member 21 can also be driven by a cylinder. The cylinder is set to be radially distributed along the support plate 23, and the cylinder is set to be a number of cylinders that are evenly distributed around the axis of the support plate 23 and match the number of inner support members 21.

[0036] Furthermore, such as Figure 4 As shown, the inner support member 21 has a T-shaped structure, and the connecting rod 211 is arranged at the end of the T-shaped structure to facilitate the layout of the drive oblique hole 241 in the rotating disk 24. The middle section of the T-shaped structure's sidewall forms a slide rail guide fit with the support disk 23, ensuring that the inner support member 21 slides stably along the radial direction of the support disk 23. The front section of the T-shaped structure has an arc-shaped surface, so that when the inner support member 21 is in the outward sliding unfolded state, the surface walls of all the T-shaped structures combine to form a circular structure that matches the inner diameter of the connecting pipe 11. Thus, when the inner support member 21 is internally fixed to the connecting pipe 11, the contact part between the inner support member 21 and the connecting pipe 11 has the same curvature as the inner wall of the connecting pipe 11, reducing the deformation of the connecting pipe 11 caused by the contact of the inner support member 21. In practical implementation, when the inner support member 21 is in a retracted state of sliding inward, the two ends of the front section of the T-shaped structure in adjacent inner support members 21 can abut against each other; in addition, in the retracted state, the distance between the front surface wall of the front section of the T-shaped structure and the inner wall of the connecting pipe 11 is as small as possible, so that after the inner support member 21 slides out, the distance between the breaks in the circular structure formed by the front surface walls of all the T-shaped structures is as small as possible, so as to ensure a better support effect on the inner wall of the connecting pipe 11.

[0037] Based on the above, such as Figure 1 and Figure 2 As shown, the fixing mechanism includes a support column 30, on which a power component is provided for driving the fixing component 20 to reciprocate on the support column 30. The support column 30 facilitates the insertion of the fixing component 20 from the main body 12 into the inner cavity of the connecting pipe 11; in addition, the power component on the support column 30 can automatically drive the fixing component 20 to reciprocate.

[0038] Furthermore, such as Figure 4 As shown, a guide post 22 for sliding guidance of the support disk 23 is fixed on the support disk 23. The guide post 22 is parallel to the axis of the support disk 23, ensuring stable axial sliding of the support disk 23. The power assembly includes a rack 43 connected to the fixed assembly 20. The length direction of the rack 43 is parallel to the sliding direction of the fixed assembly 20. A drive motor 41 is mounted on the support post 30, and a drive gear 42 that meshes with the rack 43 is mounted on the output shaft of the drive motor 41. The drive gear 42 driven by the output shaft of the drive motor 41 rotates clockwise or counterclockwise, and the drive gear 42 meshes with the rack 43, thereby driving the rack 43 and the fixed assembly 20 as a whole to produce a reciprocating sliding motion. The method of using the meshing of the drive gear 42 and the rack 43 to drive the support disk 23 to produce a reciprocating motion has the advantages of stable transmission and large transmission stroke. Of course, in specific implementations, a cylinder can also be used to drive the support disk 23 to produce a reciprocating sliding motion.

[0039] Furthermore, such as Figure 4As shown, the fixing components 20 are arranged in two coaxial sets, which can realize synchronous internal support and fixation of both ends of the connecting pipe 11. In addition, the drive gear 42 is located between the two sets of fixing components 20, and the racks 43 on both sets of fixing components 20 are meshed with the drive gear 42 for transmission. This allows one drive gear 42 to drive two racks 43 to achieve synchronous reciprocating motion, effectively reducing the cost of the device.

[0040] It is worth mentioning that, such as Figure 2 As shown, a guide member 31 is fixed on the fixing mechanism. The guide member 31 is used to guide the sliding of the fixing mechanism on the lost foam body 10 so that the fixing component 20 slides to the inner cavity of the connecting pipe 11 according to a predetermined path and angle; ensuring that the fixing component 20 can move accurately to the predetermined position of the inner cavity of the connecting pipe 11 at a predetermined angle, and finally achieve stable internal support and fixing of the inner cavity of the connecting pipe 11.

[0041] Furthermore, the guide member 31 is a guide groove, the cavity of which matches the rib 121 inside the main body 12. The rib 121 is an integral structure within the main body 12 of the lost foam body 10. The guide member 31 cleverly utilizes the rib 121 to achieve guidance, and the structure is ingenious and does not require external structures to achieve positioning between the fixing mechanism and the lost foam body 10.

[0042] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0044] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A lost foam casting fixing device, characterized in that, It includes a fixing mechanism that can be inserted into the inner cavity of the coupling tube (11) by the main tube body (12) of the lost foam body (10). The insertion end of the fixing mechanism has a fixing component (20) that can generate reciprocating motion along the inner cavity of the coupling tube (11). The telescopic end of the fixing component (20) is provided with an inner support member (21) that can move radially along the coupling tube (11) and abut against the inner wall of the coupling tube (11). The fixing component (20) includes a support plate (23) that can reciprocate along its own axis. When the support plate (23) is located in the inner cavity of the connecting pipe (11), it is coaxially distributed with the connecting pipe (11). The support plate (23) constitutes the telescopic end of the fixing component (20). The inner support member (21) slides along the radial direction of the support plate (23) on the outer edge of the support plate (23), and the inner support member (21) is configured as a plurality of members evenly distributed around the axis of the support plate (23). The fixing mechanism includes a support column (30), and a power component is provided on the support column (30) for driving the fixing component (20) to generate the reciprocating motion on the support column (30).

2. The lost foam casting fixing device according to claim 1, characterized in that, The support plate (23) is coaxially fitted with a rotating disk (24). The rotating disk (24) is eccentrically provided with a number of driving oblique holes (241) matching the number of inner support members (21). All driving oblique holes (241) are arranged in a spiral shape. Each inner support member (21) is fixed with a connecting rod (211) that is inserted into the corresponding driving oblique hole (241). The support plate (23) is provided with a motor assembly (25) for driving the rotating disk (24) to rotate.

3. The lost foam casting fixing device according to claim 2, characterized in that, The inner support member (21) has a T-shaped structure, and the connecting rod (211) is arranged at the end of the T-shaped structure. The middle section of the T-shaped structure and the support plate (23) form a slide rail guide fit. The front section of the T-shaped structure has an arc-shaped surface. So when the inner support member (21) is in the outward sliding unfolded state, the surface walls of all the T-shaped structures are combined to form a circular structure that matches the inner diameter of the connecting pipe (11).

4. The lost foam casting fixing device according to claim 1, characterized in that, The support plate (23) is fixed with a guide post (22) for sliding guidance of the support plate (23). The guide post (22) is parallel to the axis of the support plate (23). The power assembly includes a rack (43) connected to the fixed assembly (20). The length direction of the rack (43) is parallel to the sliding direction of the fixed assembly (20). A drive motor (41) is mounted on the support post (30), and a drive gear (42) that meshes with the rack (43) is mounted on the output shaft of the drive motor (41).

5. The lost foam casting fixing device according to claim 4, characterized in that, The fixed components (20) are arranged in two coaxial groups, and the drive gear (42) is located between the two fixed components (20). The racks (43) on both fixed components (20) mesh with the drive gear (42) for transmission.

6. A lost foam casting fixing device according to claim 1, 2, or 3, characterized in that, The fixing mechanism is fixed with a guide (31), which is used to guide the fixing mechanism to slide on the lost foam body (10) so that the fixing component (20) slides to the inner cavity of the connecting pipe (11) according to a predetermined path and angle.

7. A lost foam casting fixing device according to claim 6, characterized in that, The guide member (31) is a guide groove, the cavity of which matches the rib (121) on the inner side of the main body (12).

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