Guide sleeve for precision automatic lathe

Abstract

The utility model relates to the field of precision automatic lathe, and discloses a guide sleeve for precision automatic lathe, which comprises a lower conductor, the top end of the outer wall of the lower conductor is fixedly connected with a connecting port, the top end of the outer wall of the connecting port is fixedly connected with a connecting sleeve, and the surfaces of the connecting sleeve and the connecting port are provided with open slots. A plurality of groups of annular grooves are formed in the inner side walls of the connecting port and the connecting sleeve, straight grooves are formed in the inner side walls of the connecting port and the connecting sleeve, and a high-temperature wet grinding stabilizing layer is fixedly connected to the top end of the outer wall of the medium-range antifriction anti-sticking layer. According to the utility model, a lubricant storage and flow system formed by the connecting port and the annular groove and the straight groove on the connecting sleeve can automatically seep and continuously supplement the lubricant according to the movement of the bar, so that the good lubrication state between the bar and the guide sleeve is always kept, the friction coefficient is effectively reduced, the abrasion and the energy loss are reduced, and the service life of the guide sleeve is prolonged. And the processing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of Swiss-type lathes, and in particular to a guide sleeve for Swiss-type lathes. Background Technology

[0002] In the field of modern precision machining, Swiss-type lathes are widely used in the production of parts in many industries such as aerospace, automobile manufacturing, and medical devices due to their high precision and high efficiency machining capabilities.

[0003] As a key component of the Swiss-type lathe, the guide sleeve plays a crucial role in ensuring machining accuracy and improving machining quality. During the machining process of the Swiss-type lathe, the bar stock needs to be precisely guided and supported by the guide sleeve to ensure that it can maintain a stable position and movement trajectory during high-speed rotation and cutting, thereby achieving high-precision machining requirements.

[0004] Currently, existing guide sleeves for Swiss-type lathes have some shortcomings: some guide sleeves have unreasonable lubrication methods and imperfect lubricant storage and supply mechanisms. Often, the lubrication effect is acceptable in the initial stage of processing, but as the processing time increases, the lubricant is easily squeezed out or exhausted, and cannot continuously provide good lubrication for the contact parts between the bar stock and the guide sleeve. This leads to an increase in the coefficient of friction, resulting in problems such as dry friction and heat generation. This not only affects the processing accuracy but may also damage the bar stock and the guide sleeve. Therefore, a guide sleeve for Swiss-type lathes is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a guide sleeve for a Swiss-type machine, which aims to improve the problem in the prior art that the lubricant is easily squeezed out or exhausted as the processing time increases, and cannot continuously provide good lubrication for the contact parts between the bar stock and the guide sleeve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a guide sleeve for a Swiss-type machine, comprising a lower conductor, a connecting port fixedly connected to the top of the outer wall of the lower conductor, a connecting sleeve fixedly connected to the top of the outer wall of the connecting port, an opening groove being provided on the surface of both the connecting sleeve and the connecting port, multiple sets of annular grooves being provided on the inner sidewall of the connecting port and the connecting sleeve, and a straight groove being provided on the inner sidewall of the connecting port and the connecting sleeve.

[0007] The lower conductor includes a strong base wear-resistant layer, an initial anti-oxidation layer is fixedly connected to the top of the outer wall of the strong base wear-resistant layer, an intermediate friction-reducing and anti-sticking layer is fixedly connected to the top of the outer wall of the initial anti-oxidation layer, and a high-temperature lubrication and stabilizing layer is fixedly connected to the top of the outer wall of the intermediate friction-reducing and anti-sticking layer.

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

[0009] The top of the outer wall of the high-temperature wear-stabilizing layer is fixedly connected to a wear-resistant fine-guiding layer, the top of the outer wall of the wear-resistant fine-guiding layer is fixedly connected to a high-temperature antioxidant layer, and the top of the outer wall of the high-temperature antioxidant layer is fixedly connected to an outer sealing layer.

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

[0011] The straight groove is connected to multiple sets of annular grooves.

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

[0013] The lower conductor, connection port, and connection sleeve are integrally cast.

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

[0015] The bottom end of the lower conductor has an external threaded groove.

[0016] As a further description of the above technical solution:

[0017] The surface of the lower conductor is provided with stress grooves.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the lubricant storage and flow system formed by the annular groove and straight groove on the connecting port and the connecting sleeve can automatically seep out and continuously replenish the lubricant according to the movement of the bar stock, ensuring that the bar stock and the guide sleeve always maintain a good lubrication state, effectively reducing the coefficient of friction, reducing wear and energy loss, and improving processing efficiency.

[0020] 2. In this utility model, the multi-layer coating structure design, with each coating layer working together, from the strong base wear-resistant layer to the outer sealing layer, respectively endows the guide sleeve with high hardness and wear resistance, anti-oxidation, friction reduction and anti-sticking, high temperature lubrication stability, precise guidance and good sealing properties, effectively resisting wear, oxidation and corrosion problems in the processing process, and greatly improving the service life and stability of the guide sleeve. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a guide sleeve for a Swiss-type machine proposed in this utility model;

[0022] Figure 2 This is a partial cross-sectional view of the lower conductor, connecting port, and connecting sleeve of a guide sleeve for a Swiss-type machine, as proposed in this utility model.

[0023] Figure 3 This is a partial cross-sectional view of the overall structure of a guide sleeve for a Swiss-type machine proposed in this utility model.

[0024] Legend:

[0025] 1. Bottom conductor; 11. Outer sealing layer; 12. High-temperature anti-oxidation layer; 13. Wear-resistant fine-conducting layer; 14. High-temperature lubrication and stabilizing layer; 15. Mid-range friction-reducing and anti-sticking layer; 16. Initial anti-oxidation layer; 17. Strong base wear-resistant layer; 2. Connection port; 3. Connection sleeve; 4. Opening groove; 5. Annular groove; 6. Straight groove. Detailed Implementation

[0026] 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.

[0027] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a guide sleeve for a Swiss-type machine, comprising a lower conductor 1. The surface of the bottom end of the lower conductor 1 has an external threaded groove. This external threaded groove at the bottom end allows for precise fixing of the entire assembly in the corresponding working position on the machine, ensuring the sleeve's positional stability during high-speed operation and processing, preventing displacement during processing, and thus guaranteeing processing accuracy. The surface of the lower conductor 1 also has stress grooves. When the sleeve is subjected to external pressure, tension, or other loads, the stress grooves act as a buffer, altering the stress distribution.

[0028] Reference Figure 2 A connecting port 2 is fixedly connected to the top of the outer wall of the lower conductor 1, and a connecting sleeve 3 is fixedly connected to the top of the outer wall of the connecting port 2. The lower conductor 1, the connecting port 2, and the connecting sleeve 3 are integrally cast, which increases the overall stability and avoids the risk of high-temperature fracture during high-speed rotation caused by welding. Opening grooves 4 are provided on the surfaces of both the connecting sleeve 3 and the connecting port 2. Multiple sets of annular grooves 5 are provided on the inner sidewalls of the connecting port 2 and the connecting sleeve 3. The annular grooves 5 allow the internal cavity to store a certain amount of lubricant. When the bar is inserted... After entering the interior, the lubricant seeps out from the annular groove 5, forming a lubricating layer between the bar and the whole. The presence of the annular groove 5 also allows the lubricant to continuously lubricate the contact parts when the bar moves axially, avoiding dry friction due to the extrusion of lubricant. The inner sidewalls of the connecting port 2 and the connecting sleeve 3 are provided with straight grooves 6. By providing straight grooves 6, the lubricant can be guided to flow better in the axial direction of the bar. The straight grooves 6 are connected to multiple sets of annular grooves 5. The connection between the two allows the lubricant to be automatically replenished through the annular grooves 5 when the straight grooves 6 are replenished.

[0029] Reference Figure 3 The lower conductor 1 includes a strong base wear-resistant layer 17, which is made of tungsten carbide coating. Tungsten carbide coating has high hardness and wear resistance, effectively enhancing the wear resistance of the conductor sleeve substrate. A primary anti-oxidation layer 16 is fixedly connected to the top of the outer wall of the strong base wear-resistant layer 17. The primary anti-oxidation layer 16 is made of titanium aluminum nitride coating, which has good chemical stability and anti-oxidation wear performance, and also high hardness. It serves to prevent oxidation of the conductor sleeve substrate and provides initial wear resistance at the bottom layer. A mid-range friction-reducing and anti-sticking layer 15 is fixedly connected to the top of the outer wall of the primary anti-oxidation layer 16. The mid-range friction-reducing and anti-sticking layer 15 is made of DLC (dioxanone carbide). The diamond-like carbon coating further reduces friction and wear between the bar and the guide sleeve in the middle layer, while preventing the bar material from sticking to the guide sleeve. A high-temperature wear-stabilizing layer 14 is fixedly connected to the top of the outer wall of the middle friction-reducing and anti-sticking layer 15. The high-temperature wear-stabilizing layer 14 is made of silicon nitride coating, which has excellent high-temperature stability, wear resistance and self-lubrication. It can effectively reduce the coefficient of friction and improve the service life of the guide sleeve. A wear-resistant fine guiding layer 13 is fixedly connected to the top of the outer wall of the high-temperature wear-stabilizing layer 14. The wear-resistant fine guiding layer 13 is made of diamond coating, which has extremely high hardness, extremely low coefficient of friction and excellent wear resistance and chemical stability. As the top layer coating, it can provide the ultimate wear resistance, enabling the guide sleeve to be used in the harshest processing environment. At the same time, its low coefficient of friction is also conducive to the precise guidance of the bar stock. The top of the outer wall of the wear-resistant fine guiding layer 13 is fixedly connected to a high-temperature anti-oxidation layer 12. The high-temperature anti-oxidation layer 12 is made of aluminum chromium nitride coating, which has high hardness and good high-temperature anti-oxidation performance. At high temperature, it can form a dense aluminum oxide and chromium oxide protective film, effectively preventing further oxidation and wear of the coating, while also having a certain self-lubricating property. The upper layer is mainly used to cope with high temperature and oxidation environment to ensure the stability of the guide sleeve during long-term high temperature processing. The top of the outer wall of the high temperature anti-oxidation layer 12 is fixedly connected to the outer sealing layer 11. The outer sealing layer 11 is made of boron nitride wearable sealing coating, which is composed of a metal skeleton phase and a high porosity non-metallic phase. The metal phase ensures the thermal stability, erosion resistance and adhesion to the substrate of the coating, while the non-metallic phase plays a role in reducing friction, anti-adhesion and self-lubrication, which can make the rotating parts fit better inside the coating, thereby improving the sealing performance. As the uppermost coating, it can improve the sealing performance in some guide sleeve application scenarios with high sealing requirements and reduce the impact of the gap between the bar and the guide sleeve on the processing accuracy.

[0030] Working Principle: Multiple annular grooves 5 are formed on the inner sidewalls of the connecting port 2 and the connecting sleeve 3. The cavities formed inside these grooves can store a certain amount of lubricant (such as grease). When the bar is inserted into the guide sleeve, the contact and relative movement between the bar and the inner wall of the guide sleeve will compress the lubricant in the annular grooves 5, causing the lubricant to seep out from the annular grooves 5 and form a lubricating layer between the bar and the guide sleeve. This lubricating layer greatly reduces the friction between the bar and the guide sleeve, reduces the degree of wear, and facilitates the smooth axial movement of the bar within the guide sleeve. Moreover, even if some lubricant is squeezed out during the continuous axial movement of the bar, the lubricant stored in the annular grooves 5 can continue to seep out to replenish it, so that the lubricating layer can be continuously maintained, avoiding damage caused by… In the event of dry friction due to lubricant depletion, the straight groove 6, connected to multiple annular grooves 5, ensures optimal lubrication for the movement of the bar stock. Its primary function is to guide the lubricant to flow more effectively along the axial direction of the bar stock. When grease is added to the straight groove 6, it flows along the groove's direction and automatically passes through the connected annular grooves 5, replenishing the lubricant within them. This allows for convenient and even distribution of lubricant to each annular groove 5, whether initially added or replenished during use. This ensures sufficient lubrication of the entire guide sleeve's inner wall in contact with the bar stock, further optimizing lubrication and improving the guide sleeve's performance and service life.

[0031] The guide sleeve used in Swiss-type lathes features multiple coatings, each with a crucial function. The strong base wear-resistant layer 17 (tungsten carbide coating) provides a wear-resistant foundation, reduces substrate wear, and maintains guiding function. The initial anti-oxidation layer 16 (titanium aluminum nitride coating) prevents substrate oxidation and shares the friction load. The intermediate friction-reducing and anti-sticking layer 15 (DLC diamond-like carbon coating) reduces friction, prevents adhesion, and ensures guiding. The high-temperature lubrication and stabilization layer 14 (silicon nitride coating) provides stable lubrication at high temperatures, increasing service life. The wear-resistant and precise guiding layer 13 (diamond coating) provides wear resistance and precise guiding in harsh environments. The high-temperature anti-oxidation layer 12 (aluminum chromium nitride coating) forms a protective film with self-lubricating properties, improving stability. The outer sealing layer 11 (boron nitride wear-resistant sealing coating) enhances sealing performance and optimizes working and machining accuracy. All coatings work together to ensure the guide sleeve meets the high precision, long service life, and stable operation requirements of the Swiss-type lathe.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A guide bush for a hearting machine comprising a lower guide body (1), characterized in that: The top end of the outer wall of the lower conductor (1) is fixedly connected with a connecting port (2), the top end of the outer wall of the connecting port (2) is fixedly connected with a connecting sleeve (3), the surfaces of the connecting sleeve (3) and the connecting port (2) are both provided with an open slot (4), the inner side walls of the connecting port (2) and the connecting sleeve (3) are provided with a plurality of annular grooves (5), and the inner side walls of the connecting port (2) and the connecting sleeve (3) are provided with a straight groove (6). The lower conductor (1) comprises a strong-base wear-resistant layer (17), the top end of the outer wall of the strong-base wear-resistant layer (17) is fixedly connected with a primary anti-oxidation layer (16), the top end of the outer wall of the primary anti-oxidation layer (16) is fixedly connected with a medium-range friction-reducing anti-sticking layer (15), and the top end of the outer wall of the medium-range friction-reducing anti-sticking layer (15) is fixedly connected with a high-temperature lubricating grinding stabilizing layer (14).

2. The bushing for a movement according to claim 1, characterized in that: The top end of the outer wall of the high-temperature lubricating grinding stabilizing layer (14) is fixedly connected with a wear-resistant fine guide layer (13), the top end of the outer wall of the wear-resistant fine guide layer (13) is fixedly connected with a high-temperature anti-oxidation layer (12), and the top end of the outer wall of the high-temperature anti-oxidation layer (12) is fixedly connected with an outer layer sealing layer (11).

3. The bushing for a movement as claimed in claim 1, characterized in that: The straight groove (6) is communicated with the plurality of annular grooves (5).

4. The bushing for a movement as claimed in claim 1, characterized in that: The lower conductor (1), the connecting port (2) and the connecting sleeve (3) are integrally cast.

5. The bushing for a movement as claimed in claim 1, characterized in that: The surface of the bottom end of the lower conductor (1) is provided with an external thread groove.

6. The bushing for a movement as claimed in claim 1, characterized in that: The surface of the lower conductor (1) is provided with a stress groove.

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