Mold shell fixing and in-furnace center positioning structure for vacuum melt injection

Abstract

The utility model relates to the technical field of mold shell fixing and in-furnace center positioning, and discloses a mold shell fixing and in-furnace center positioning structure for vacuum melt injection, which comprises a fixing tool main body, a mold shell and a lifting platform, an L-shaped fixing buckle is arranged on the outer side of the fixing tool main body, a locking bolt hole is arranged on the L-shaped fixing buckle, and the lifting platform is connected with the mold shell. The L-shaped fixing buckle is fixedly connected to the fixing tool body through the locking bolt, the locking bolt is connected into the locking bolt hole in a threaded mode, and a dovetail groove is formed in the L-shaped fixing buckle. According to the utility model, the mould shell can be fixed and positioned in the center quickly, so that the defects of cold shut or under-injection of a casting caused by pouring of the mould shell, pouring of molten steel out of the mould shell and overlong time for fixing and positioning the center of the mould shell in the pouring process are effectively avoided, and the quick, safe and smooth implementation of the smelting and pouring process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mold shell fixing and furnace center positioning structure, in particular to a mold shell fixing and furnace center positioning structure for vacuum melting and injection. Background Art

[0002] With the rapid development of high-end manufacturing industries such as aerospace engines, high-temperature alloy precision castings, such as blades, integrally cast blisks, turbine rotors, etc., have also been widely used and developed. Engine blades, blisks, turbines, etc. are often produced by remelting high-temperature alloy master alloys in a three-chamber vacuum induction melting furnace and pouring them into product mold shells. During the pouring production process, the preheated mold shell is taken out of the preheating furnace, transferred to the mold shell chamber and placed on the lifting platform for fixation, and then the mold shell is lifted and sent to the melting chamber for pouring. During the process of taking out, transferring, and placing the mold shell on the lifting platform, the mold shell transfer speed, fixation, and positioning are all very important. If the transfer speed is slow, the mold shell will cool down severely during pouring, and cold shut or insufficient pouring defects are prone to occur. If the fixation is not good, the mold shell will be easily dumped when impacted by molten steel during pouring. If the positioning is inaccurate, the molten steel will easily spill outside the pouring cup during pouring. Therefore, it is necessary to strictly control the fixation of the mold shell and the positioning on the lifting platform, which is crucial for the safe and smooth implementation of the melting and pouring process.

[0003] At present, in the production process of a three-chamber vacuum induction melting furnace, a simple pad or bracket is often made and placed on a lifting platform to support the mold shell. When the mold shell is picked out from the preheating furnace or transferred to the mold shell chamber of the vacuum furnace by forklift, the worker first uses the pad or bracket to tie it on the lifting platform with wire, and then adjusts the mold shell to the center position of the furnace body based on experience, so that the molten steel can be injected into the mold shell during pouring. However, in actual operation, there are often problems such as the mold shell is not firmly fixed, pouring occurs, the center positioning is inaccurate, the molten steel is thrown out of the mold shell, the fixing and center positioning time is too long, the mold shell temperature drops suddenly, the casting produces cold shut or under-injection, and the casting is scrapped. The utility model patent designs a mold shell fixing and furnace center positioning structure to achieve mold shell fixing, rapid transportation, and rapid positioning. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a mold shell fixing and furnace center positioning structure for vacuum melting.

[0005] In order to achieve the above-mentioned objectives, the utility model adopts the following technical scheme: a mold shell fixing and furnace center positioning structure for vacuum melting, comprising a fixed tooling body, a mold shell, and a lifting platform, the fixed tooling body is provided with an L-shaped fixing buckle on the outside, the L-shaped fixing buckle is provided with a locking bolt hole, the L-shaped fixing buckle is fixedly connected to the fixed tooling body through a locking bolt, the locking bolt is threadedly connected in the locking bolt hole, the L-shaped fixing buckle is provided with a dovetail groove, the L-shaped fixing buckle is slidably connected with a locking bolt baffle, one side of the locking bolt baffle is affixed to the locking bolt, the fixed tooling body is provided with a positioning platform, the lifting platform is fixedly connected with a guide plate through the L-shaped locking buckle and the L-shaped fixing buckle, the L-shaped locking buckle is affixed to the lifting platform and the guide plate, the guide plate is provided with a positioning groove, the positioning platform is slidably connected to the positioning groove, the fixed tooling body is provided with a mold shell pad, and the mold shell pad is provided with a mold shell.

[0006] As a further description of the above technical solution:

[0007] The fixing tool body is a circular structure surrounded by three cylinders, the locking bolt is a T-shaped hollow cylinder, the locking bolt baffle is a dovetail groove thin plate, the positioning platform is an arc shape, and the positioning groove is an annular structure.

[0008] As a further description of the above technical solution:

[0009] The L-shaped locking buckle is provided with a threaded hole, and a bolt is threadedly connected in the threaded hole.

[0010] As a further description of the above technical solution:

[0011] The L-shaped locking buckles are provided with three groups, and the three groups of L-shaped locking buckles are evenly distributed on the lifting platform.

[0012] As a further description of the above technical solution:

[0013] The positioning platforms are provided in three groups, and the three groups of positioning platforms are evenly distributed on the fixed tooling body.

[0014] As a further description of the above technical solution:

[0015] The locking bolt holes are provided in three groups, and the three groups of locking bolt holes are evenly distributed on the L-shaped fixing buckle. As a further description of the above technical solution:

[0016] The L-shaped fixing buckles are provided in three groups, and the three groups of L-shaped fixing buckles are evenly distributed on the fixing tool body.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, the mold shell can be fixed and quickly positioned in the center, which effectively avoids the mold shell from tipping over during the pouring process, the molten steel is poured outside the mold shell, and the fixing and center positioning time is too long, causing the casting cold shut or under-pouring defects, thereby ensuring the rapid, safe and smooth implementation of the melting and pouring process.

[0019] 2. In the utility model, the mold shell fixing tooling main structure and the rapid center positioning guide plate structure enable the mold shell to be firmly fixed and quickly positioned, thereby improving the casting success rate and casting quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a mold shell fixing and furnace center positioning structure for vacuum melting and injection proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of the main structure of a fixed tooling for fixing a mold shell for vacuum melting and a center positioning structure in a furnace proposed by the utility model;

[0022] Figure 3 This is a cross-sectional view of a mold shell fixing and furnace center positioning structure for vacuum melting and injection proposed by the utility model;

[0023] Figure 4 The utility model provides a cross-sectional view of an L-shaped fixing buckle for fixing the mold shell for vacuum melting and positioning the center in the furnace.

[0024] Legend:

[0025] 1. Fix the tooling body; 2. Locking bolt hole; 3. Locking bolt; 4. L-shaped fixing buckle; 5. Locking bolt baffle; 6. Positioning platform; 7. Lifting platform; 8. L-shaped locking buckle; 9. Guide plate; 10. Positioning groove; 11. Formwork pad; 12. Formwork; 13. Threaded hole; 14. Bolt. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Reference Figure 1-4The utility model provides an embodiment: a mold shell fixing and furnace center positioning structure for vacuum melting, including a fixed tooling body 1, a mold shell 12, and a lifting platform 7. An L-shaped fixing buckle 4 is provided on the outer side of the fixed tooling body 1, and a locking bolt hole 2 is provided on the L-shaped fixing buckle 4. The L-shaped fixing buckle 4 is fixedly connected to the fixed tooling body 1 through a locking bolt 3. The locking bolt 3 is threadedly connected in the locking bolt hole 2. A dovetail groove is provided on the L-shaped fixing buckle 4. A locking bolt baffle 5 is slidably connected to the L-shaped fixing buckle 4. One side of the locking bolt baffle 5 is attached to the locking bolt 3. A positioning platform 6 is provided on the fixed tooling body 1. The lifting platform 7 is provided on the fixed tooling body 1. The lowering platform 7 is fixedly connected with the guide plate 9 by the L-shaped locking buckle 8 and the L-shaped fixing buckle 4. The L-shaped locking buckle 8 fits the lifting platform 7 and the guide plate 9. The guide plate 9 is provided with a positioning groove 10. The positioning platform 6 is slidably connected to the positioning groove 10. The fixed tooling body 1 is provided with a mold shell pad 11, and the mold shell pad 11 is provided with a mold shell 12, which can realize the fixation of the mold shell 12 and the rapid center positioning, and effectively avoid the occurrence of the mold shell 12 tipping over during the pouring process, the pouring of molten steel outside the mold shell 12, and the long fixing and center positioning time causing the casting cold shut or under-pouring defects, thereby ensuring the rapid, safe and smooth implementation of the smelting and pouring process.

[0028] Among them, the fixed tooling body 1 is a circular structure surrounded by three cylinders, the locking bolt 3 is a T-shaped hollow cylinder, the locking bolt baffle 5 is a dovetail groove thin plate, the positioning platform 6 is an arc shape, the positioning groove 10 is a ring structure, and the L-shaped locking buckle 8 is provided with a threaded hole 13, and the threaded hole 13 is internally threaded with a bolt 14. There are three groups of L-shaped locking buckles 8, and the three groups of L-shaped locking buckles 8 are evenly distributed on the lifting platform 7. There are three groups of positioning platforms 6, and the three groups of positioning platforms 6 are evenly distributed on the fixed tooling body 1. There are three groups of locking bolt holes 2, and the three groups of locking bolt holes 2 are evenly distributed on the L-shaped fixing buckles 4. There are three groups of L-shaped fixing buckles 4, and the three groups of L-shaped fixing buckles 4 are evenly distributed on the fixed tooling body 1. The mold shell 12 fixes the tooling body 1 structure and the quick center positioning guide plate 7 structure, so that the mold shell 12 can be firmly fixed and quickly positioned, thereby improving the casting success rate and casting quality of castings.

[0029] Working principle: Before pouring the casting, the mold shell 12 must be placed in the center of the furnace. The fixing tool body 1, the L-shaped fixing buckle 4 and the mold shell 12 must be assembled and fixed into an integral body through the locking bolt 3 and the locking bolt baffle 5, and the high-temperature resistant mold shell pad 11 is inserted into the gap between the mold shell 12 and the fixed tool body 1 to achieve the fixation of the tooling and the mold shell 12 as a whole. The guide plate 9 and the lifting platform 7 are locked and fixed together through the L-shaped locking buckle 8. The mold shell 12 fixed by the tooling in the preheating furnace is quickly transferred to the lifting platform 7 of the three-chamber vacuum furnace through the hydraulic power transfer vehicle, and the mold shell 12 tooling is gently pushed to seat the positioning platform 6 in the positioning groove 10 to complete the fixation and positioning of the mold shell 12. The furnace door is quickly closed, vacuum is evacuated, the lifting platform 7 is raised, and the molten steel is poured to complete the casting production of the casting.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum melting mold fixing and furnace center positioning structure, comprising a fixed tooling body (1), a mold shell (12), and a lifting platform (7), characterized in that: An L-shaped fixing buckle (4) is arranged on the outside of the fixing tool body (1), and a locking bolt hole (2) is arranged on the L-shaped fixing buckle (4). The L-shaped fixing buckle (4) is fixedly connected to the fixing tool body (1) through a locking bolt (3), and the locking bolt (3) is threadedly connected in the locking bolt hole (2). A dovetail groove is arranged on the L-shaped fixing buckle (4), and a locking bolt baffle (5) is slidably connected to the L-shaped fixing buckle (4), and one side of the locking bolt baffle (5) is in contact with the locking bolt (3). The fixed tooling body (1) is provided with a positioning platform (6), the lifting platform (7) is fixedly connected to a guide plate (9) via an L-shaped locking buckle (8) and an L-shaped fixing buckle (4), the L-shaped locking buckle (8) is fitted to the lifting platform (7) and the guide plate (9), the guide plate (9) is provided with a positioning groove (10), the positioning platform (6) is slidably connected to the positioning groove (10), the fixed tooling body (1) is provided with a mold shell pad (11), and the mold shell pad (11) is provided with a mold shell (12).

2. A vacuum melting mold fixing and furnace center positioning structure according to claim 1, characterized in that: The fixing tool body (1) is a circular structure surrounded by three columns, the locking bolt (3) is a T-shaped hollow cylinder, the locking bolt baffle (5) is a dovetail groove thin plate, the positioning platform (6) is an arc shape, and the positioning groove (10) is an annular structure.

3. A vacuum melting mold fixing and furnace center positioning structure according to claim 2, characterized in that: The L-shaped locking buckle (8) is provided with a threaded hole (13), and a bolt (14) is internally threadedly connected to the threaded hole (13).

4. A vacuum melting mold fixing and furnace center positioning structure according to claim 3, characterized in that: The L-shaped locking buckles (8) are provided in three groups, and the three groups of the L-shaped locking buckles (8) are evenly distributed on the lifting platform (7).

5. A vacuum melting mold fixing and furnace center positioning structure according to claim 4, characterized in that: The positioning platforms (6) are provided in three groups, and the three groups of positioning platforms (6) are evenly distributed on the fixed tooling body (1).

6. A vacuum melting mold fixing and furnace center positioning structure according to claim 5, characterized in that: The locking bolt holes (2) are provided with three groups, and the three groups of locking bolt holes (2) are evenly distributed on the L-shaped fixing buckle (4).

7. A vacuum melting mold fixing and furnace center positioning structure according to claim 6, characterized in that: The L-shaped fixing buckles (4) are provided in three groups, and the three groups of L-shaped fixing buckles (4) are evenly distributed on the fixing tool body (1).

Images