A large complex thin-walled machine case coating and hanging tool

Abstract

A large complex thin-walled machine case coating tool. Relates to the field of investment casting auxiliary equipment. The defects of the existing large complex thin-walled machine case coating process, therefore, provide a large complex thin-walled machine case coating tool, realize uniform coating of paint, guarantee the size precision of the shell, reduce the production difficulty. The utility model discloses a tool body, transmission fixed assembly and drive assembly, transmission fixed assembly and drive assembly are all installed on the tool body, and the power input end of transmission fixed assembly is connected with the power output end of drive assembly, and the tool body bottom is equipped with the universal wheel with the brake locking function, transmission fixed assembly includes the main pipe for connecting the wax mould and the main shaft, and the main shaft is connected with the main pipe, and drive assembly includes drive motor, speed reducer and distribution box, drive motor is connected with speed reducer, and drive motor drives the main shaft through speed reducer and drives the wax mould to rotate at uniform speed, ensures that the paint is coated uniformly. The utility model is applied to the field of thin-walled machine case coating.

Description

Technical Field

[0001] This utility model relates to the technical field of investment casting auxiliary equipment, specifically to a large, complex, thin-walled casing coating fixture. Background Technology

[0002] As a key mechanical component, the large, complex, thin-walled casing is a double-layered annular casting with an outer contour of Φ1200mm × 380mm. The main body wall thickness is only 4mm with significant variations, and most surfaces are unmachined. The inner and outer rings are connected by six hollow support plates, making it a typical large, thin-walled, annular complex structural component. In the investment casting production of this type of casing, shell fabrication is one of the core processes, and the uniformity of the coating directly determines the quality of the shell.

[0003] Currently, traditional coating methods mostly employ fixed static coating or simple manual rotating coating. The former is prone to local accumulation due to the weight of the coating itself, while the latter is difficult to ensure a stable rotation speed. Both of these methods result in uneven coating thickness on the mold shell, which in turn leads to dimensional deviations in various parts of the subsequent casing casting that exceed the acceptance standards. This not only increases the production rework rate and the risk of product scrap, but also significantly increases the production cycle and cost. Utility Model Content

[0004] In order to overcome the shortcomings of existing coating processes for large, complex, thin-walled casings, this utility model provides a coating fixture for large, complex, thin-walled casings, which achieves uniform coating, ensures the dimensional accuracy of the casing, and reduces production difficulty.

[0005] The technical solution of this utility model is:

[0006] A large, complex, thin-walled casing coating fixture, comprising a fixture body, a transmission and fixing assembly for connecting and fixing the casing wax model and transmitting power, and a drive assembly for driving the transmission and fixing assembly to rotate the wax model.

[0007] Both the transmission fixing component and the drive component are mounted on the tooling body, and the power input end of the transmission fixing component is connected to the power output end of the drive component. The bottom of the tooling body is provided with universal wheels with braking and locking functions.

[0008] The transmission fixing assembly includes a main pipe and a main shaft for connecting the wax model, the main shaft being connected to the main pipe.

[0009] The drive assembly includes a drive motor, a reducer, and a distribution box. The drive motor is connected to the reducer, and the drive motor drives the main shaft through the reducer to rotate the wax mold at a uniform speed, ensuring that the paint is applied evenly.

[0010] Furthermore, the transmission fixing assembly also includes a first connecting shaft, a second connecting shaft, a half coupling and a shaft cover, a ferrule, and a first nut and a second nut for fixing the ferrule;

[0011] The main tube is located inside the wax model, and the spindle is inserted inside the main tube;

[0012] The two ends of the main shaft are respectively connected to the first connecting shaft and the second connecting shaft, and are fixedly connected by the half coupling;

[0013] The end of the second connecting shaft away from the first connecting shaft is fixedly connected to the main shaft, and the end of the main shaft away from the second connecting shaft is fixedly connected to the half coupling.

[0014] The sleeve and the main tube are provided with a locking opening for a fitting gap;

[0015] The first nut and the second nut are threaded to the main shaft and abut against both sides of the sleeve, and the shaft cover is threaded to the end of the main shaft.

[0016] Furthermore, the connection method between the main pipe and the first connecting shaft and the connection method between the first connecting shaft and the second connecting shaft are flange connection or key connection.

[0017] Furthermore, the drive assembly also includes a bearing housing and a cam;

[0018] The output end of the drive motor is connected to the input end of the reducer, and the power distribution box is electrically connected to the drive motor and is equipped with a speed adjustment knob;

[0019] The bearing housing is sleeved on the outside of the main shaft and fixed to the tooling body, and the cam is installed on the outside of the first connecting shaft.

[0020] Furthermore, the distribution box is equipped with a speed adjustment button to control the output speed of the drive motor, thereby adjusting the rotation speed of the spindle.

[0021] Furthermore, the bearing housing is equipped with a deep groove ball bearing, and the deep groove ball bearing is interference-fitted with the spindle.

[0022] Furthermore, the gap between the sleeve and the main tube's locking mechanism is less than 0.1 mm.

[0023] Furthermore, the tooling body is made of Q235 steel, and the surface of the tooling body is provided with an anti-rust coating.

[0024] Furthermore, the connection between the shaft cover and the main shaft is a threaded connection, and a sealing ring is provided between the shaft cover and the main shaft.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The drive motor of this utility model can output a slow speed stably through the reducer, which drives the wax model to rotate synchronously and uniformly with the main shaft. Under the combined action of gravity and centrifugal force, the paint is evenly adhered to the surface of the wax model, which completely solves the problem of paint accumulation in traditional coating. The thickness deviation of the shell can be controlled within ±0.2mm, which meets the dimensional acceptance requirements of each part of the casing.

[0027] The new utility model features a snap-fit ​​design between the sleeve and the main tube, along with a double-nut axial limiting design, which effectively prevents relative movement between the wax mold and the main shaft, avoiding wax mold displacement during the coating process. At the same time, the multi-section connecting shaft is detachable, making it easy to replace the main tube according to different specifications of wax molds, thus ensuring strong adaptability.

[0028] This utility model tooling body is equipped with universal wheels for easy movement and adjustment; the power distribution box has intuitive start / stop and speed adjustment buttons to reduce the difficulty of operation; the overall modular design makes it easy to replace and repair damaged parts, which can meet the needs of mass production of large, complex, thin-walled casings and reduce production rework rate and cost. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 yes Figure 1 The main view in the middle;

[0031] Figure 3 yes Figure 1 Top view in the middle;

[0032] Figure 4 yes Figure 1 The right view in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the first connecting shaft;

[0034] Figure 6 yes Figure 5 The right view in the middle;

[0035] Figure 7 This is a schematic diagram of the second connecting shaft;

[0036] Figure 8 This is a structural diagram of the supervisor;

[0037] Figure 9 yes Figure 8 The left view in the middle;

[0038] Figure 10 This is a schematic diagram of the nut structure;

[0039] Figure 11 yes Figure 10 The left view in the middle;

[0040] Figure 12This is a schematic diagram of the card sleeve structure;

[0041] Figure 13 yes Figure 12 AA section view

[0042] Figure 14 This is a schematic diagram of the main shaft structure;

[0043] Figure 15 yes Figure 14 Top view;

[0044] Figure 16 This is a schematic diagram of the half-coupling;

[0045] Figure 17 yes Figure 16 Side view in the middle;

[0046] In the diagram: 1. Main shaft, 2. First connecting shaft, 3. Second connecting shaft, 4. Main shaft, 5. Compression fitting, 6. First nut, 7. Second nut, 8. Shaft cover, 9. Half coupling, 10. Tooling body, 11. Bearing seat, 12. Cam, 13. Drive motor, 14. Reducer, 15. Distribution box, 16. Caster wheel. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0048] Specific implementation method one: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture, which includes a fixture body 10, a transmission and fixing assembly for connecting and fixing the casing wax model and transmitting power, and a drive assembly for driving the transmission and fixing assembly to rotate the wax model.

[0049] Both the transmission fixing component and the drive component are mounted on the tooling body 10, and the power input end of the transmission fixing component is connected to the power output end of the drive component. The bottom of the tooling body 10 is provided with a universal wheel 16 with a braking locking function.

[0050] The transmission fixing assembly includes a main pipe 1 and a main shaft 4 for connecting the wax model, wherein the main shaft 4 is connected to the main pipe 1.

[0051] The drive assembly includes a drive motor 13, a reducer 14, and a distribution box 15. The drive motor 13 is connected to the reducer 14. The drive motor 13 drives the main shaft 4 through the reducer 14 to rotate the wax mold at a uniform speed, ensuring that the paint is applied evenly.

[0052] The tooling body 10 has a rectangular frame structure, and the surface is coated with an anti-rust coating to improve corrosion resistance;

[0053] The tool body 10 is equipped with casters 16 at the four corners of its bottom. The casters 16 have a braking and locking function, which facilitates the overall movement and adjustment of the tool body 10 and can also be fixed during operation to ensure stability.

[0054] The transmission fixing assembly is used to connect and fix the wax mold, and at the same time transmit driving force. The transmission fixing assembly includes a main pipe 1, a first connecting shaft 2, a second connecting shaft 3, a main shaft 4, a half coupling 9, a ferrule 5, a first nut 6, a second nut 7, and a shaft cover 8.

[0055] Specific Implementation Method Two: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture. The transmission fixing assembly further includes a first connecting shaft 2, a second connecting shaft 3, a half coupling 9, a shaft cover 8, a ferrule 5, and a first nut 6 and a second nut 7 for fixing the ferrule 5.

[0056] The two ends of the main shaft 4 are respectively connected to the first connecting shaft 2 and the second connecting shaft 3, and are fixedly connected by the half coupling 9;

[0057] The end of the second connecting shaft 3 away from the first connecting shaft 2 is fixedly connected to the main shaft 4, and the end of the main shaft 4 away from the second connecting shaft 3 is fixedly connected to the half coupling 9;

[0058] The sleeve 5 is fitted onto the outside of the main tube 1, and the sleeve 5 and the main tube 1 are provided with a locking opening for a fitting gap;

[0059] The first nut 6 and the second nut 7 are threadedly connected to the main shaft 4 and abut against both sides of the sleeve 5. The shaft cover 8 is threadedly connected to the end of the main shaft 4.

[0060] Specific implementation method three: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture, wherein the main shaft 4 is connected to the first connecting shaft 2 and the second connecting shaft 3 by a flange connection or a key connection.

[0061] The drive assembly is used to provide stable, slow rotational power and includes a drive motor 13, a reducer 14, a distribution box 15, a bearing housing 11, and a cam 12.

[0062] The drive motor 13 is a servo motor, which is mounted on a mounting plate on one side of the tooling body 10. Its output end is connected to the input end of the reducer 14 through a coupling. The output end of the reducer 14 is connected to the half coupling 9 through bolts. Through the speed reduction and torque increase effect of the reducer 14, the speed of the drive motor 13 can be reduced to meet the slow rotation requirements of paint coating.

[0063] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture, wherein the drive assembly further includes a bearing housing 11 and a cam 12;

[0064] The output end of the drive motor 13 is connected to the input end of the reducer 14, and the power distribution box 15 is electrically connected to the drive motor 13 and is equipped with a speed adjustment knob.

[0065] The bearing housing 11 is sleeved on the outside of the main shaft 4 and fixed to the tooling body 10, and the cam 12 is installed on the outside of the first connecting shaft 2.

[0066] Specific Implementation Method Five: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture. The power distribution box 15 is equipped with a speed adjustment button to control the output speed of the drive motor 13, thereby adjusting the rotation speed of the main shaft 4.

[0067] The power distribution box 15 is fixed on the outside of the tooling body 10. It is equipped with a controller and speed control module. The surface of the power distribution box is equipped with a start / stop button and a speed adjustment knob. It is electrically connected to the drive motor 13 and can control the start / stop of the motor and the output speed, thereby adjusting the rotation speed of the spindle 4.

[0068] Specific Implementation Method Six: Combination Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture. The bearing housing 11 is equipped with a deep groove ball bearing, and the deep groove ball bearing is interference-fitted with the spindle 4.

[0069] The shaft cover 8 is threadedly connected to the end of the main shaft 4 away from the half coupling 9. A sealing ring is provided at the connection between the shaft cover 8 and the main shaft 4 to protect against dust and paint penetration.

[0070] Specific implementation method seven: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture, wherein the gap between the ferrule 5 and the main pipe 1 is less than 0.1 mm.

[0071] The sleeve 5 is fitted on the outside of the connection between the main tube 1 and the main shaft 4. The inner wall of the sleeve 5 and the outer wall of the main tube 1 are provided with matching slots. The gap between the slots is ≤0.1mm, which can prevent the main tube 1 and the main shaft 4 from rotating relative to each other.

[0072] The first nut 6 and the second nut 7 are respectively connected to the external threads on the outside of the main shaft 4, and respectively abut against the two sides of the ferrule 5. The ferrule 5 and the main shaft 1 are axially fixed by tightening the nuts.

[0073] Specific implementation method eight: Combination Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture. The fixture body 10 is made of Q235 steel and has an anti-rust coating on its surface.

[0074] The drive assembly is used to provide stable, slow rotational power and includes a drive motor 13, a reducer 14, a distribution box 15, a bearing housing 11, and a cam 12.

[0075] Cam 12 is installed on the outside of the first connecting shaft 2. The outer edge of cam 12 contacts the auxiliary support wheel on the tooling body 10, which can help adjust the transmission rhythm and further improve the smoothness of the rotation of the main shaft 4.

[0076] Specific Implementation Method Nine: Combining Figure 1 and Figure 2 This embodiment describes a large, complex, thin-walled casing coating fixture. The shaft cover 8 is connected to the main shaft 4 by a threaded connection, and a sealing ring is provided between the shaft cover 8 and the main shaft 4.

[0077] (1) Tooling preparation: Move the tooling to the painting operation area, lock the caster wheel 16 to fix the tooling position, check the connection of the drive motor 13 and reducer 14 through the distribution box 15 to check if the connection is normal, and rotate the main shaft 4 to confirm that the bearing seat 11 supports smoothly and without jamming.

[0078] (2) Wax model installation and fixing:

[0079] First, place the main tube 1 into the wax model to be coated. Then, insert the spindle 4 into the main tube 1 and use the ferrule 5, the first nut 6, and the second nut 7 to fix the spindle 4 and the main tube 1. Finally, place the spindle 4 on the first connecting shaft 2 and the second connecting shaft 3 respectively, and fix it with the half coupling 9 to complete the fixing of the wax model.

[0080] (3) Painting operation:

[0081] Turn on the power supply of the distribution box 15, set the spindle speed 4 to the preset value using the speed adjustment knob, and press the start / stop button to start the drive motor 13.

[0082] The power of the drive motor 13 is reduced by the reducer 14 and then transmitted to the main shaft 4 through the half coupling 9, which drives the wax model to rotate slowly and uniformly. The operator holds the paint spray gun and sprays the paint evenly along the circumference of the wax model. During the spraying process, because the wax model continues to rotate, the paint can be evenly adhered without accumulation.

[0083] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A coating fixture for a large, complex, thin-walled casing, characterized in that, The tooling includes a tooling body (10), a transmission fixing assembly for connecting and fixing the wax mold of the casing and transmitting power, and a drive assembly for driving the transmission fixing assembly to rotate the wax mold. Both the transmission fixing component and the drive component are installed on the tooling body (10), and the power input end of the transmission fixing component is connected to the power output end of the drive component. The tooling body (10) is provided with a universal wheel (16) with a braking locking function at the bottom. The transmission fixing assembly includes a main pipe (1) for connecting the wax model and a main shaft (4), the main shaft (4) being connected to the main pipe (1). The drive assembly includes a drive motor (13), a reducer (14) and a distribution box (15). The drive motor (13) is connected to the reducer (14). The drive motor (13) drives the main shaft (4) through the reducer (14) to rotate the wax mold at a uniform speed, ensuring that the coating is applied evenly.

2. The coating fixture for large, complex, thin-walled casings according to claim 1, characterized in that, The transmission fixing assembly also includes a first connecting shaft (2), a second connecting shaft (3), a half coupling (9), a shaft cover (8), a ferrule (5), and a first nut (6) and a second nut (7) for fixing the ferrule (5); The main tube (1) is located inside the wax mold, and the main shaft (4) is inserted inside the main tube (1); The two ends of the main shaft (4) are respectively connected to the first connecting shaft (2) and the second connecting shaft (3), and are fixedly connected by the half coupling (9); The end of the second connecting shaft (3) away from the first connecting shaft (2) is fixedly connected to the main shaft (4), and the end of the main shaft (4) away from the second connecting shaft (3) is fixedly connected to the half coupling (9); The sleeve (5) and the main tube (1) are provided with a locking slot with a fitting gap, and the sleeve (5) is keyed to the main shaft (4); The first nut (6) and the second nut (7) are threaded to the main shaft (4) and abut against both sides of the sleeve (5). The shaft cover (8) is threaded to the end of the main shaft (4).

3. The coating fixture for large, complex, thin-walled casings according to claim 2, characterized in that, The connection between the main pipe (1) and the first connecting shaft (2) and the connection between the first connecting shaft (2) and the second connecting shaft (3) are flange connection or key connection.

4. The coating fixture for large, complex, thin-walled casings according to claim 1, characterized in that, The drive assembly also includes a bearing housing (11) and a cam (12). The output end of the drive motor (13) is connected to the input end of the reducer (14), and the power distribution box (15) is electrically connected to the drive motor (13) and is equipped with a speed adjustment knob; The bearing seat (11) is sleeved on the outside of the main shaft (4) and fixed to the tooling body (10), and the cam (12) is installed on the outside of the first connecting shaft (2).

5. The coating fixture for large, complex, thin-walled casings according to claim 4, characterized in that, The distribution box (15) is equipped with a speed adjustment button to control the output speed of the drive motor (13) and thereby adjust the rotation speed of the main shaft (4).

6. The coating fixture for large, complex, thin-walled casings according to claim 4, characterized in that, The bearing housing (11) is equipped with a deep groove ball bearing, and the deep groove ball bearing is interference-fitted with the main shaft (4).

7. The coating fixture for large, complex, thin-walled casings according to claim 2, characterized in that, The gap between the card sleeve (5) and the main tube (1) is less than 0.1 mm.

8. The coating fixture for large, complex, thin-walled casings according to claim 1, characterized in that, The tooling body (10) is made of Q235 steel and has an anti-rust coating on its surface.

9. The coating fixture for a large, complex, thin-walled casing according to claim 2, characterized in that, The shaft cover (8) is connected to the main shaft (4) by a threaded connection, and a sealing ring is provided between the shaft cover (8) and the main shaft (4).

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