Sand grain prevention device for drying titanium alloy shell

Abstract

The invention discloses a sand grain prevention device for drying a titanium alloy shell, which comprises a protective tooling plate mounted on a shell hanger, the protective tooling plate and the shell hanger are both located on the same layer of a drying room, and the center of the protective tooling plate is provided with a rectangular notch matched with the bottom end of the shell hanger; four fixing frames are arranged between the protection tool plate and the shell hanging frame. A sliding type connecting structure is arranged between the fixing frame and the protection tool plate. A rotary clamping mechanism is arranged between the fixing frame and the shell hanging frame. The protective tool plate is installed on the profile hanging frame on the first layer of the drying box and is matched with the fixing frame for installation, floating sand can be effectively prevented from falling onto the first layer of shell from the second layer of the drying box, and therefore the first layer of shell is protected against pollution and damage, the casting quality and the production efficiency are improved, and the production cost is reduced. Meanwhile, the protective tool plate has the advantage of being convenient to disassemble and assemble, disassembly and overhaul during follow-up maintenance are facilitated, and the later maintenance efficiency is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of investment casting of titanium alloys, and particularly relates to a sand - preventing device for drying titanium alloy shells. Background Art

[0002] During the investment casting process of titanium alloys, the quality of the shell directly affects the performance of the final casting. The treatment of floating sand after shell coating is one of the key steps to ensure the quality of the shell. As an accessory in the coating process, if the floating sand is not effectively cleaned, it will seriously affect the strength of the shell. For large and complex structural parts, the existence of floating sand will cause poor bonding between shell layers, resulting in an overhead phenomenon, and thus greatly reducing the overall strength of the shell. This problem is particularly prominent during the inspection of the shell after dewaxing and roasting. Metallurgical defects such as surface layer shedding, casting tumors, sand falling, and bulging inside the shell are often closely related to improper treatment of floating sand.

[0003] In the existing shell - making line, the drying room of the casing shell is usually composed of two upper and lower rooms, separated by an iron plate with pores in the middle. Although this design achieves a certain degree of space separation to some extent, it brings new problems in actual operation. Especially when treating the floating sand on the second - layer shell in the drying box, due to the small and light characteristics of the floating sand, it is very easy to fall onto the shell on the first - layer of the drying box through the pores in the iron plate. This not only pollutes the surface of the first - layer shell but also may damage its internal structure, thus affecting the quality of the casting. Therefore, the present invention proposes a sand - preventing device for drying titanium alloy shells. Summary of the Invention

[0004] The purpose of the present invention is to provide a sand - preventing device for drying titanium alloy shells to solve the problem that when treating the floating sand on the second - layer shell in the drying box, due to the small and light characteristics of the floating sand, it is very easy to fall onto the shell on the first - layer of the drying box through the pores in the iron plate, which not only pollutes the surface of the first - layer shell but also may damage its internal structure, thus affecting the quality of the casting as mentioned in the above background art.

[0005] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A sand - preventing device for drying titanium alloy shells, including a protective tooling plate installed on the shell hanging rack, and both the protective tooling plate and the shell hanging rack are located on the first floor of the drying room. The center of the protective tooling plate has a rectangular notch adapted to the bottom end of the shell hanging rack.

[0006] Four fixing frames are arranged between the protective tooling plate and the shell hanging rack.

[0007] A sliding connection structure is arranged between the fixing frame and the protective tooling plate.

[0008] A rotation engaging mechanism is provided between the fixing frame and the shell hanging frame.

[0009] Preferably, the rotation engaging mechanism includes a cylindrical base rod fixed on the surface of the shell hanging frame, and a cylindrical movable seat movably sleeved on the surface of the cylindrical base rod. A circular end plate is fixed at the front end of the cylindrical base rod, and a cylindrical end groove corresponding to the circular end plate is formed at the front end of the cylindrical movable seat. The circular end plate slides in the cylindrical end groove, and a first spring is further sleeved on the surface of the cylindrical base rod relative to the inner side of the cylindrical end groove. A limit pressing block is fixed on the surface of the cylindrical movable seat. The rotation engaging mechanism further includes a circular through hole formed on the bottom surface of the fixing frame, and a side through hole for the limit pressing block to enter and exit is formed on one side of the circular through hole. The end of the cylindrical movable seat passes through the circular through hole to the front surface of the fixing frame.

[0010] Preferably, one end of the first spring abuts against the inner wall of the cylindrical end groove, and the other end of the first spring abuts against the back of the circular end plate.

[0011] Preferably, a positioning clamping rod is fixed on the bottom surface of the fixing frame relative to one side of the circular through hole, and a positioning clamping notch corresponding to the positioning clamping rod is formed on the surface of the limit pressing block.

[0012] Preferably, an annular groove is further formed on the front surface of the cylindrical movable seat.

[0013] Preferably, the sliding connection structure includes a T-shaped slider fixed on the top surface of the fixing frame, a T-shaped sliding groove formed on the bottom surface of the protective tooling plate, and a rectangular disassembly and assembly opening formed at one end of the T-shaped sliding groove and communicating with the bottom surface of the protective tooling plate. The T-shaped slider slides into the T-shaped sliding groove.

[0014] Preferably, the sliding connection structure further includes an inner groove formed on the upper wall of the T-shaped sliding groove, a second spring and a telescopic clamping bead installed in the inner groove. A circular clamping groove corresponding to the telescopic clamping bead is formed on the top surface of the T-shaped slider. The telescopic clamping bead is movably installed in the inner groove through the second spring, and the bottom end of the telescopic clamping bead pops out into the circular clamping groove.

[0015] Preferably, one end of the second spring is fixed on the upper wall of the inner groove, and the other end of the second spring is fixed to the top end of the telescopic clamping bead.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By installing a protective tooling plate on the profile hanging frame on the first layer of the drying oven and cooperating with the fixing frame for installation, the present invention can effectively block the floating sand from falling from the second layer of the drying oven to the first-layer shell, thereby protecting the first-layer shell from pollution and damage, improving the quality and production efficiency of the casting. At the same time, the protective tooling plate has the characteristics of convenient disassembly and assembly, which is convenient for disassembly and maintenance during subsequent maintenance, and ensures the maintenance efficiency in the later stage. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic connection diagram of the protective tooling plate and the mold shell hanger of the present invention;

[0019] Figure 3 is the present invention Figure 2 a partial enlarged view of area A in;

[0020] Figure 4 is a cross-sectional view of the rotary clamping mechanism of the present invention;

[0021] Figure 5 is the present invention Figure 2 a partial enlarged view of area B in;

[0022] Figure 6 is a cross-sectional view of the sliding connection structure of the present invention;

[0023] In the figure: 1. Protective tooling plate; 2. Fixed frame; 21. Positioning clamping rod; 3. Mold shell hanger; 5. Drying room; 61. Cylindrical movable seat; 62. Limiting pressure block; 621. Positioning bayonet; 63. Circular perforation; 64. Side perforation; 65. Circular end plate; 66. Cylindrical end groove; 67. Spring I; 68. Cylindrical base rod; 71. T-shaped sliding groove; 72. Rectangular disassembly and assembly opening; 73. T-shaped slider; 74. Inner groove; 75. Spring II; 76. Telescopic clamping bead; 77. Circular clamping groove. Detailed Description of the Invention

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment

[0026] Please refer to Figures 1 to 6, which is an embodiment of the present invention. This embodiment provides a technical solution: a sand - preventing device for drying titanium alloy shell molds, including a protective tooling plate 1 installed on the shell mold hanger 3, and both the protective tooling plate 1 and the shell mold hanger 3 are on the first floor of the drying room 5. When drying titanium alloy shell molds on the second floor in the drying room 5, the protective tooling plate 1 can effectively block floating sand from falling from the second floor of the drying oven onto the shell molds on the first floor, thereby protecting the shell molds on the first floor from pollution and damage, improving the quality and production efficiency of castings. The center of the protective tooling plate 1 has a rectangular notch adapted to the bottom end of the shell mold hanger 3, so that the protective tooling plate 1 can be installed on the surface of the shell mold hanger 3 from bottom to top;

[0027] There are four fixing frames 2 provided between the protective tooling plate 1 and the shell mold hanger 3;

[0028] There is a sliding connection structure provided between the fixing frame 2 and the protective tooling plate 1;

[0029] There is a rotary clamping mechanism provided between the fixing frame 2 and the shell mold hanger 3.

[0030] In this embodiment, preferably, the rotary clamping mechanism includes a cylindrical base rod 68 fixed on the surface of the shell mold hanger 3, a cylindrical movable seat 61 movably sleeved on the surface of the cylindrical base rod 68. A circular end plate 65 is fixed at the front end of the cylindrical base rod 68, and a cylindrical end groove 66 corresponding to the circular end plate 65 is opened at the front end of the cylindrical movable seat 61. The circular end plate 65 slides in the cylindrical end groove 66, and a first spring 67 is also sleeved on the surface of the cylindrical base rod 68 relative to the inner side of the cylindrical end groove 66. A limiting pressure block 62 is welded and fixed on the surface of the cylindrical movable seat 61. The rotary clamping mechanism also includes a circular through - hole 63 opened on the bottom - end surface of the fixing frame 2, and a side through - hole 64 for the limiting pressure block 62 to enter and exit is opened on one side of the circular through - hole 63. The end of the cylindrical movable seat 61 passes through the circular through - hole 63 to the front surface of the fixing frame 2, which can effectively support the bottom end of the fixing frame 2. Then, rotate the cylindrical movable seat 61 so that the limiting pressure block 62 is no longer aligned with the side through - hole 64, and the separation of the fixing frame 2 from the shell mold hanger 3 can be prevented, completing the rapid assembly between the fixing frame 2 and the shell mold hanger 3.

[0031] In this embodiment, preferably, one end of the first spring 67 abuts against the inner wall of the cylindrical end groove 66, and the other end of the first spring 67 abuts against the back of the circular end plate 65.

[0032] In this embodiment, preferably, a positioning latch rod 21 is welded and fixed to one side of the bottom surface of the fixing bracket 2 relative to the circular perforation 63. A positioning bayonet 621 corresponding to the positioning latch rod 21 is formed on the surface of the limiting pressure block 62. When the fixing bracket 2 and the mold shell hanger 3 are assembled subsequently, first, the front end of the cylindrical movable seat 61 is passed through the circular perforation 63 to the front surface of the fixing bracket 2, and then the limiting pressure block 62 is also passed through the side perforation 64 to the front surface of the fixing bracket 2. At this time, the cylindrical movable seat 61 can be rotated so that the limiting pressure block 62 is no longer aligned with the side perforation 64. Then, the cylindrical movable seat 61 is pulled forward, causing the first spring 67 to be gradually compressed, resulting in the forward movement of the limiting pressure block 62. In this state, the cylindrical movable seat 61 is continuously rotated so that the positioning bayonet 621 is aligned with the positioning latch rod 21. Then, the cylindrical movable seat 61 is released, causing the first spring 67 to push the cylindrical movable seat 61 back to its original position and causing the positioning latch rod 21 to be inserted into the positioning bayonet 621, thus completing the limiting after the rotation of the cylindrical movable seat 61 and the limiting pressure block 62. At the same time, the limiting pressure block 62 will press on the bottom surface of the fixing bracket 2 to ensure the connection stability between the fixing bracket 2 and the mold shell hanger 3. Subsequently, if it is necessary to disassemble the fixing bracket 2 from the mold shell hanger 3, only need to first pull the cylindrical movable seat 61 forward to separate the limiting pressure block 62 from the positioning latch rod 21, and then rotate the cylindrical movable seat 61 so that the limiting pressure block 62 is aligned with the side perforation 64, and the fixing bracket 2 and the mold shell hanger 3 can be smoothly disassembled, which is convenient for subsequent disassembly, assembly and maintenance of the protective tooling plate 1.

[0033] In this embodiment, preferably, an annular groove is also formed on the front end surface of the cylindrical movable seat 61, which can facilitate subsequent operators to pull the cylindrical movable seat 61 forward with their fingers.

[0034] In this embodiment, preferably, the sliding connection structure includes a T-shaped slider 73 welded and fixed to the top surface of the fixed frame 2, a T-shaped sliding groove 71 opened on the bottom surface of the protective tooling plate 1, and a rectangular disassembly and assembly opening 72 opened at one end of the T-shaped sliding groove 71 and communicating with the bottom surface of the protective tooling plate 1. The T-shaped slider 73 slides into the T-shaped sliding groove 71. The sliding connection structure further includes an inner groove 74 opened on the upper wall of the T-shaped sliding groove 71, a second spring 75 and a telescopic clamping bead 76 installed in the inner groove 74. A circular clamping groove 77 corresponding to the telescopic clamping bead 76 is opened on the top surface of the T-shaped slider 73. The telescopic clamping bead 76 is movably installed in the inner groove 74 through the second spring 75, and the bottom end of the telescopic clamping bead 76 pops out into the circular clamping groove 77, so as to clamp and limit the T-shaped slider 73, ensuring the connection stability between the fixed frame 2 and the protective tooling plate 1. During the initial installation of the fixed frame 2 and the protective tooling plate 1, the T-shaped slider 73 at the top of the fixed frame 2 is first pushed into the T-shaped sliding groove 71 through the rectangular disassembly and assembly opening 72, and then the T-shaped slider 73 is slid towards the inner end of the T-shaped sliding groove 71, causing the bottom end of the telescopic clamping bead 76 to be clamped into the circular clamping groove 77 under the push of the second spring 75, so as to clamp and limit the T-shaped slider 73 and the fixed frame 2, completing the rapid assembly of the fixed frame 2 and the protective tooling plate 1. During subsequent disassembly, only the fixed frame 2 needs to be slid towards the direction of the rectangular disassembly and assembly opening 72, causing the T-shaped slider 73 to slide out from the rectangular disassembly and assembly opening 72, so as to quickly separate the fixed frame 2 and the protective tooling plate 1.

[0035] In this embodiment, preferably, one end of the second spring 75 is fixed to the upper wall of the inner groove 74, and the other end of the second spring 75 is fixed to the top end of the telescopic clamping bead 76.

[0036] In summary, during the installation of the protective tooling plate 1, first, the protective tooling plate 1 is sleeved on the surface of the mold shell hanging rack 3 from bottom to top. Then, the T-shaped slider 73 at the top of the fixed frame 2 enters the T-shaped sliding groove 71 through the rectangular disassembly and assembly opening 72. Next, the cylindrical movable seat 61 on the surface of the mold shell hanging rack 3 is rotated, so that the limiting pressure block 62 can be aligned with the side through hole 64. Then, the bottom end of the fixed frame 2 is pushed towards the mold shell hanging rack 3, causing the T-shaped slider 73 to slide to the inner end of the T-shaped sliding groove 71 and connecting the bottom end of the fixed frame 2 to the cylindrical movable seat 61, thus quickly completing the installation of the protective tooling plate 1 and improving the convenience of disassembly and assembly.

[0037] Although the embodiments of the present invention have been shown and described (see the above detailed description), for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand grain prevention device for drying titanium alloy shells, characterized in that: It includes a protective tooling plate (1) installed on the shell hanger (3), and both the protective tooling plate (1) and the shell hanger (3) are on the first floor of the drying room (5). A rectangular notch adapted to the bottom end of the shell hanger (3) is provided at the center of the protective tooling plate (1). Four fixing frames (2) are provided between the protective tooling plate (1) and the shell hanger (3). A sliding connection structure is provided between the fixing frame (2) and the protective tooling plate (1). A rotary clamping mechanism is provided between the fixing frame (2) and the shell hanger (3).

2. The anti-sand particle device for drying the titanium alloy shell according to claim 1, wherein: The rotary clamping mechanism includes a cylindrical base rod (68) fixed on the surface of the shell hanger (3), a cylindrical movable seat (61) movably sleeved on the surface of the cylindrical base rod (68). A circular end plate (65) is fixed at the front end of the cylindrical base rod (68), and a cylindrical end groove (66) corresponding to the circular end plate (65) is provided at the front end of the cylindrical movable seat (61). The circular end plate (65) slides in the cylindrical end groove (66), and a first spring (67) is further sleeved on the surface of the cylindrical base rod (68) relative to the inner side of the cylindrical end groove (66). A limit pressing block (62) is fixed on the surface of the cylindrical movable seat (61). The rotary clamping mechanism further includes a circular through hole (63) provided on the bottom surface of the fixing frame (2), and a side through hole (64) for the limit pressing block (62) to enter and exit is provided on one side of the circular through hole (63). The end of the cylindrical movable seat (61) passes through the circular through hole (63) to the front surface of the fixing frame (2).

3. The anti-sand particle device for drying titanium alloy shell mold according to claim 2, characterized in that: One end of the first spring (67) abuts against the inner wall of the cylindrical end groove (66), and the other end of the first spring (67) abuts against the back of the circular end plate (65).

4. The anti-sand particle device for drying the titanium alloy shell mold according to claim 2, characterized in that: A positioning clamping rod (21) is fixed on the bottom surface of the fixing frame (2) relative to one side of the circular through hole (63), and a positioning clamping notch (621) corresponding to the positioning clamping rod (21) is provided on the surface of the limit pressing block (62).

5. The anti-sand particle device for drying the titanium alloy shell according to claim 2, wherein: An annular groove is further provided on the front surface of the front end of the cylindrical movable seat (61).

6. The anti-sand particle device for drying the titanium alloy shell according to claim 1, characterized in that: The sliding connection structure includes a T-shaped slider (73) fixed on the top surface of the fixing frame (2), a T-shaped sliding groove (71) provided on the bottom surface of the protective tooling plate (1), and a rectangular disassembly and assembly opening (72) provided at one end of the T-shaped sliding groove (71) and communicating with the bottom surface of the protective tooling plate (1). The T-shaped slider (73) slides into the T-shaped sliding groove (71).

7. The anti-sand particle device for drying the titanium alloy shell mold according to claim 6, wherein: The sliding connection structure further includes an inner groove (74) provided on the upper wall of the T-shaped sliding groove (71), a second spring (75) and a telescopic clamping bead (76) installed in the inner groove (74). A circular clamping groove (77) corresponding to the telescopic clamping bead (76) is provided on the top surface of the T-shaped slider (73). The telescopic clamping bead (76) is movably installed in the inner groove (74) through the second spring (75), and the bottom end of the telescopic clamping bead (76) pops out into the circular clamping groove (77).

8. The anti-sand particle device for drying the titanium alloy shell mold according to claim 7, wherein: One end of the second spring (75) is fixed on the upper wall of the inner groove (74), and the other end of the second spring (75) is fixed to the top end of the telescopic clamping bead (76).

Images