turning center

Abstract

The application discloses a turning center, which comprises a base, a tool holder assembly and an oil return channel. The top of the base is provided with a static pressure guide rail group. The tool holder assembly comprises a support seat and a tool holder. The support seat is slidably arranged in the static pressure guide rail group. The top of the support seat is provided with a first static pressure guide rail. The tool holder is slidably arranged in the first static pressure guide rail. The oil return channel is arranged in the base and the support seat. At least one end of the oil return channel sequentially passes through the static pressure guide rail group, the support seat and the first static pressure guide rail. At least the other end of the oil return channel extends to the outer circumferential surface of the base. The turning center solves the problems of low machining precision and machining stability of the turning center in the prior art.

Description

Technical Field

[0001] This application relates to the field of machining technology, and more specifically, to a turning center. Background Technology

[0002] Turning centers can process shaft parts and rotating parts. During processing, they not only have turning functions, but also can perform multiple composite processing operations such as drilling, boring, milling, thread cutting and tapping.

[0003] Turning centers using hydrostatic guideways leverage hydraulic oil for load bearing, significantly improving their accuracy and load-bearing capacity. However, the hydrostatic guideway design makes the hydraulic oil prone to contamination, affecting machining accuracy and stability, and potentially causing machining malfunctions. Furthermore, hydraulic oil is typically reused; contamination of the hydraulic oil will further reduce machining accuracy and stability. Utility Model Content

[0004] The main objective of this application is to provide a turning center that at least solves the problems of low machining accuracy and low machining stability in existing turning centers.

[0005] According to one aspect of this application, a turning center is provided, comprising:

[0006] The base has a hydrostatic guide rail assembly on its top.

[0007] A tool holder assembly, comprising a support base and a tool holder, wherein the support base is slidably disposed on the hydrostatic guide rail assembly, a first hydrostatic guide rail is disposed on the top of the support base, and the tool holder is slidably disposed on the first hydrostatic guide rail;

[0008] An oil return channel is provided in the base and the support seat. At least one end of the oil return channel passes through the hydrostatic guide rail assembly, the support seat and the first hydrostatic guide rail in sequence, and at least the other end of the oil return channel extends to the outer peripheral surface of the base.

[0009] Furthermore, the oil return channel includes:

[0010] The first oil return section is disposed in the support base, at least one end of the first oil return section extends to the first hydrostatic guide rail, and at least the other end of the first oil return section extends to the hydrostatic guide rail assembly.

[0011] The second oil return section is connected to the first oil return section and is disposed inside the base. At least one end of the second oil return section extends to the hydrostatic guide rail assembly, and at least the other end of the second oil return section extends to the outer side of the base.

[0012] Furthermore, the oil return channel also includes an oil passage section, which is disposed within the hydrostatic guide rail assembly, and the two opposite ends of the oil passage section are respectively connected to the first oil return section and the second oil return section.

[0013] Furthermore, the hydrostatic guide rail assembly includes:

[0014] The second hydrostatic guide rail is disposed on the top of the base and extends along the first direction of the base. A first oil passage hole is provided through the second hydrostatic guide rail.

[0015] The third hydrostatic guide rail is slidably disposed on the second hydrostatic guide rail. The third hydrostatic guide rail extends along a second direction, which is perpendicular to the first direction and the height direction of the turning center. A second oil passage hole is provided through the third hydrostatic guide rail.

[0016] The first oil passage and the second oil passage are interconnected and form the oil passage section.

[0017] Further, the second hydrostatic guide rail includes a second track, a second slider, and a second support platform. The second track is fixed to the base and extends along the first direction. The second slider is slidably disposed on the second track. The second support platform is fixedly disposed on the second slider. The first oil passage hole passes through the second support platform, the second track, and the second slider; and / or,

[0018] The third hydrostatic guide rail includes a third track, a third slider, and a third support platform. The third track is fixed to the second hydrostatic guide rail and extends along the second direction. The third slider is slidably disposed on the third track. The third support platform is fixedly disposed on the third slider. The second oil passage hole passes through the third support platform, the third track, and the third slider.

[0019] Furthermore, the second hydrostatic guide rail is provided with a second limiting groove, and the first oil passage hole is at least partially inserted through the second limiting groove. The third hydrostatic guide rail is provided with a third limiting groove, and the second oil passage hole is at least partially inserted through the third limiting groove. Moreover, in the projection of the second oil passage hole in the height direction of the turning center, the projection surface of the second oil passage hole is located in the projection surface of the second limiting groove.

[0020] Furthermore, the outer surface of the base is provided with multiple first oil inlets, each of which is connected to the second oil return section. The turning center also includes multiple first plugs, each of which is selectively and detachably configured to correspond one-to-one with each of the first oil inlets; and / or,

[0021] The outer side of the support base is provided with a plurality of second oil inlets, each of which is connected to the first oil return section. The turning center also includes a plurality of second plugs, each of which is selectively and detachably configured to correspond one-to-one with each of the second oil inlets.

[0022] Furthermore, the top of the base has a second surface, the top of the support has a first surface, the first hydrostatic guide rail is disposed on the first surface, and the first surface is inclined to the second surface;

[0023] The first hydrostatic guide rail is provided with a first oil return port, which is connected to the oil return channel, and the first oil return port is located on the side of the first hydrostatic guide rail closer to the second surface.

[0024] Furthermore, the first hydrostatic guide rail includes:

[0025] A first track is disposed on the first surface, and a first limiting groove is provided on the first track, with the first oil return port disposed in the first limiting groove;

[0026] A first slider is slidably disposed in the first limiting groove;

[0027] The first support platform is fixedly mounted on the first slider.

[0028] Furthermore, a fourth hydrostatic guide rail is provided on the top of the base, and a second oil return port is provided on the fourth hydrostatic guide rail, which is connected to the oil return channel.

[0029] The turning center also includes a spindle assembly, which is at least partially disposed on the fourth hydrostatic guide rail.

[0030] Compared to existing technologies, the turning center of this application has an oil return channel, with at least one end of the channel passing sequentially through the hydrostatic guide rail assembly, the support base, and the first hydrostatic guide rail. This means that oil leaking from the first hydrostatic guide rail and the hydrostatic guide rail assembly can flow into the oil return channel. The oil flowing into the channel descends under gravity and eventually flows out from the outer circumference of the base, preventing the leaked oil from contaminating other components of the turning center or accumulating on the first hydrostatic guide rail or the hydrostatic guide rail assembly, thus affecting the machining accuracy and stability of the turning center. Furthermore, since the oil return channel is located inside the base and support base, it is unlikely to be damaged after long-term use, preventing oil leakage within the channel. On the other hand, since the oil return channel is located inside the base, the hydrostatic guide rail assembly, and the first hydrostatic guide rail, there is no need to connect external oil return pipes to the first hydrostatic guide rail and the hydrostatic guide rail assembly. Therefore, it can improve the space utilization rate of the turning center and reduce its manufacturing cost to a certain extent. Furthermore, since one end of the oil return channel passes sequentially through the hydrostatic guide rail assembly, the support base, and the first hydrostatic guide rail, the hydraulic oil on the hydrostatic guide rail assembly and the first hydrostatic guide rail can quickly flow into the return channel for recycling, avoiding prolonged exposure of the hydraulic oil to the outer surface of the turning center, thus preventing hydraulic oil contamination. Therefore, the design of this embodiment can improve the machining accuracy and machining stability of the turning center to a certain extent. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This is a first-person view of the structure of the turning center disclosed in this application.

[0033] Figure 2 This is a schematic diagram of the turning center disclosed in this application from a second-view perspective.

[0034] Figure 3 This is a perspective view of the base disclosed in this application;

[0035] Figure 4 This is a perspective view of the support base disclosed in this application;

[0036] Figure 5 This is a schematic diagram of the exploded structure of the second hydrostatic guide rail disclosed in this application;

[0037] Figure 6 This is a schematic diagram of the exploded structure of the third hydrostatic guide rail disclosed in this application;

[0038] Figure 7 This is a schematic diagram of the exploded structure of the first static pressure guide rail disclosed in this application.

[0039] The above figures include the following reference numerals:

[0040] 10. Base; 20. Tool Post Assembly; 21. Support Base; 22. Tool Post; 30. Hydrostatic Guide Rail Assembly; 31. First Hydrostatic Guide Rail; 32. Second Hydrostatic Guide Rail; 33. Third Hydrostatic Guide Rail; 34. Fourth Hydrostatic Guide Rail; 40. Spindle Assembly; 41. First Spindle; 42. Second Spindle; 50. Oil Return Channel; 51. First Oil Return Section; 52. Second Oil Return Section; 53. Oil Passage Section; 61. First Blocking Component; 62. Second Blocking Component; 101. First Oil Inlet; 102. Second Surface; 211. Second Oil Inlet ; 212, First surface; 311, First support platform; 312, First slider; 313, First track; 321, Second support platform; 322, Second slider; 323, Second track; 331, Third support platform; 332, Third slider; 333, Third track; 341, Fourth limiting groove; 531, First oil passage hole; 532, Second oil passage hole; 3131, First limiting groove; 3231, Second limiting groove; 3331, Third limiting groove; 3411, Second oil return port; 31311, First oil return port. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0044] It is known that turning centers use hydrostatic guideways with hydrostatic chambers. During operation, these chambers require continuous replenishment of hydraulic oil to maintain the rigidity of the oil film. When the hydrostatic guideways move, the hydraulic oil can easily leak to other parts of the turning center, leading to oil contamination or making the recovered oil unusable. To address this, some existing technologies typically connect an external return oil pipe to the hydrostatic chamber. However, this design also leads to leakage from the return oil pipe's interface after prolonged use, still contaminating the turning center and affecting its machining stability and accuracy. Furthermore, the return oil pipe increases the size and manufacturing cost of the turning center. Additionally, the hydraulic oil is usually reused; contamination reduces machining accuracy and stability when using it.

[0045] To avoid the degradation of machining accuracy and stability in turning centers. See also Figures 1 to 7 As shown, according to an embodiment of this application, a turning center is provided, which includes a base 10, a tool post assembly 20, and an oil return channel 50. A hydrostatic guide rail assembly 30 is disposed on the top of the base 10. The tool post assembly 20 includes a support base 21 and a tool post 22. The support base 21 is slidably disposed on the hydrostatic guide rail assembly 30, and a first hydrostatic guide rail 31 is disposed on the top of the support base 21. The tool post 22 is slidably disposed on the first hydrostatic guide rail 31. The oil return channel 50 is disposed within the base 10 and the support base 21. At least one end of the oil return channel 50 sequentially passes through the hydrostatic guide rail assembly 30, the support base 21, and the first hydrostatic guide rail 31, and at least the other end of the oil return channel 50 extends to the outer peripheral surface of the base 10.

[0046] Specifically, a hydrostatic guide rail assembly 30 is provided between the tool holder assembly 20 and the base 10, and a first hydrostatic guide rail 31 is provided between the support base 21 and the tool holder 22. Since the turning center of this application has an oil return channel 50, and at least one end of the oil return channel 50 passes sequentially through the hydrostatic guide rail assembly 30, the support base 21, and the first hydrostatic guide rail 31, oil leaking from the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30 can flow into the oil return channel 50. The oil flowing into the oil return channel 50 descends under the action of gravity and eventually flows out from the outer peripheral surface of the base 10, preventing the oil leaking from the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30 from contaminating other components on the turning center, or preventing the leaked oil from accumulating on the first hydrostatic guide rail 31 or the hydrostatic guide rail assembly 30, thus affecting the machining accuracy and stability of the turning center. Meanwhile, it is understood that since the oil return channel 50 is located inside the base 10 and the support 21, the oil return channel 50 is unlikely to be damaged after long-term use of the turning center, preventing oil leakage. On the other hand, because the oil return channel 50 is located inside the base 10, the hydrostatic guide rail assembly 30, and the first hydrostatic guide rail 31, there is no need to connect external oil return pipes to the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30. Therefore, it can improve the space utilization of the turning center and reduce its manufacturing cost to a certain extent. Furthermore, since one end of the oil return channel 50 passes sequentially through the hydrostatic guide rail assembly 30, the support 21, and the first hydrostatic guide rail 31, any hydraulic oil leakage from the hydrostatic guide rail assembly 30 and the first hydrostatic guide rail 31 can quickly flow into the return channel 50 for recycling, preventing the hydraulic oil from being exposed to the outer surface of the turning center for extended periods and thus avoiding hydraulic oil contamination. Therefore, the design of this embodiment can improve the machining accuracy and machining stability of the turning center to a certain extent.

[0047] In some embodiments, the turning center further includes a hydraulic station, with a return oil channel 50 connected to the hydraulic station. The hydraulic station is used to supply oil to at least the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30. One advantage of this design is that leaked oil from the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30 can be recovered to the hydraulic station, allowing for the reuse of hydraulic oil and avoiding excessive hydraulic oil consumption, thereby reducing the operating cost of the turning center.

[0048] In this embodiment, the oil return channel 50 includes a first oil return section 51 and a second oil return section 52. The first oil return section 51 is disposed within the support base 21, with at least one end extending to the first hydrostatic guide rail 31 and at least the other end extending to the hydrostatic guide rail assembly 30. The second oil return section 52 communicates with the first oil return section 51, is disposed within the base 10, with at least one end extending to the hydrostatic guide rail assembly 30 and at least the other end extending to the outer side of the base 10.

[0049] With this configuration, oil leaking from the first hydrostatic guide rail 31 can flow through the first return oil section 51 to the hydrostatic guide rail assembly 30. Subsequently, the oil on the hydrostatic guide rail assembly 30 enters the second return oil section 52, and finally flows out from the outer side of the base 10. One advantage of this design is that it eliminates the need for dynamic seals or oil hoses between the support base 21 and the hydrostatic guide rail assembly 30. Furthermore, the structure of this application is simple and easy to manufacture, thus reducing the manufacturing cost of the turning center to some extent.

[0050] Furthermore, the oil return channel 50 also includes an oil passage section 53, which is located within the hydrostatic guide rail assembly 30. The two opposite ends of the oil passage section 53 are respectively connected to the first oil return section 51 and the second oil return section 52.

[0051] In other words, when the oil leaking from the first hydrostatic guide rail 31 flows through the first return oil section 51 to the hydrostatic guide rail assembly 30, the oil on the hydrostatic guide rail assembly 30 flows through the oil passage section 53 into the second return oil section 52, and is finally discharged from the outer side of the base 10. The oil passage section 53 can prevent the oil discharged from the first return oil section 51 from contaminating the hydrostatic guide rail assembly 30 or the oil flowing out of the first return oil section 51 from accumulating on the hydrostatic guide rail assembly 30, which would eventually lead to oil contamination. Furthermore, due to the oil passage section 53, there is no need to install components such as oil drain hoses or dynamic seals on the hydrostatic guide rail assembly 30, thereby reducing the manufacturing cost of the turning center to a certain extent.

[0052] Furthermore, the hydrostatic guide rail assembly 30 includes a second hydrostatic guide rail 32 and a third hydrostatic guide rail 33. The second hydrostatic guide rail 32 is disposed on the top of the base 10 and extends along a first direction of the base 10. A first oil passage hole 531 is provided through the second hydrostatic guide rail 32. The third hydrostatic guide rail 33 is slidably disposed on the second hydrostatic guide rail 32 and extends along a second direction, which is perpendicular to the first direction and the height direction of the turning center (as shown in the attached figure). Figure 2 In the Z-direction, a second oil passage hole 532 is provided through the third hydrostatic guide rail 33. The first oil passage hole 531 and the second oil passage hole 532 are interconnected and form an oil passage section 53.

[0053] Specifically, the first direction is attached Figure 2 The X direction in the middle, the second direction is attached Figure 2In the Y direction, the third hydrostatic guide rail 33 slides on the second hydrostatic guide rail 32 to drive the tool post assembly 20 to reciprocate in the first direction, while the tool post assembly 20 slides on the third hydrostatic guide rail 33, enabling the tool post assembly 20 to reciprocate in the second direction. Furthermore, the second hydrostatic guide rail 32 and the third hydrostatic guide rail 33 are respectively provided with a first oil passage hole 531 and a second oil passage hole 532, meaning that the first oil passage hole 531 and the second oil passage hole 532 can respectively guide the oil on the second hydrostatic guide rail 32 and the third hydrostatic guide rail 33 to the second return oil section 52. In practice, when the turning center is working, the oil leaking from the first hydrostatic guide rail 31 flows through the first return oil section 51 to the third hydrostatic guide rail 33. The oil on the third hydrostatic guide rail 33 flows through the second oil passage hole 532 to the second hydrostatic guide rail 32. The oil on the second hydrostatic guide rail 32 flows through the first oil passage hole 531 into the second return oil section 52, and is finally discharged through the outer side of the base 10. Through the design of the first return oil section 51, the second oil passage hole 532, and the second return oil section 52, there is no need to install dynamic seals or oil guide hoses between the second hydrostatic guide rail 32 and the third hydrostatic guide rail 33, or between the third hydrostatic guide rail 33 and the support base 21. The oil in the first return oil section 51 can still flow into the second return oil section 52.

[0054] In some embodiments, the second hydrostatic guide rail 32 includes a second track 323, a second slider 322, and a second support platform 321. The second track 323 is fixed to the base 10 and extends along a first direction. The second slider 322 is slidably disposed on the second track 323. The second support platform 321 is fixedly disposed on the second slider 322. The first oil passage 531 passes through the second support platform 321, the second track 323, and the second slider 322.

[0055] Specifically, in some embodiments, the static pressure chamber can be located between the second support platform 321 and the second slider 322, or between the second slider 322 and the second track 323. Therefore, the oil in the static pressure chamber may leak between the second support platform 321 and the second slider 322, or between the second track 323 and the second slider 322. Furthermore, since the third static pressure guide rail 33 is located on top of the second static pressure guide rail 32, i.e., on the second support platform 321, the oil on the third static pressure guide rail 33 may flow onto the second support platform 321. Since the first oil passage hole 531 in this embodiment penetrates the second support platform 321, the second track 323, and the second slider 322, the oil on the second support platform 321, the oil leaking between the second slider 322 and the second support platform 321, the oil leaking between the second slider 322 and the second track 323, and the oil leaking from the second track 323 can all flow into the first oil return section 51 through the first oil passage hole 531. This prevents the leaked oil from accumulating between the second support platform 321, between the second support platform 321 and the second slider 322, and between the second slider 322 and the second track 323.

[0056] Furthermore, the third hydrostatic guide rail 33 includes a third track 333, a third slider 332, and a third support platform 331. The third track 333 is fixed to the second hydrostatic guide rail 32 and extends along the second direction. The third slider 332 is slidably disposed on the third track 333. The third support platform 331 is fixedly disposed on the third slider 332. The second oil passage 532 passes through the third support platform 331, the third track 333, and the third slider 332.

[0057] Similarly, since the second oil passage 532 passes through the third support platform 331, the third track 333 and the third slider 332, the oil on the third support platform 331, the oil leaking between the third support platform 331 and the third slider 332, the oil leaking between the third slider 332 and the third track 333 and the oil leaking on the third track 333 can all flow into the third oil passage through the second oil passage 532 and finally flow into the second return oil section 52.

[0058] Furthermore, the second hydrostatic guide rail 32 is provided with a second limiting groove 3231, and the first oil passage hole 531 is at least partially inserted through the second limiting groove 3231. The third hydrostatic guide rail 33 is provided with a third limiting groove 3331, and the second oil passage hole 532 is at least partially inserted through the third limiting groove 3331. Moreover, in the projection of the second oil passage hole 532 in the height direction of the turning center, the projection surface of the second oil passage hole 532 is located in the projection surface of the second limiting groove 3231.

[0059] Specifically, the second limiting groove 3231 is formed on the second track 323, and the second slider 322 is slidably disposed within the second limiting groove 3231. The second limiting groove 3231 is used to limit the movement of the second slider 322. Furthermore, the second limiting groove 3231 can also restrict leaked oil, that is, the oil is confined within the second limiting groove 3231, preventing oil from leaking from the edge of the second track 323. Simultaneously, the first oil passage hole 531 at least partially penetrates the second limiting groove 3231, meaning that the oil in the second limiting groove 3231 can flow into the second return oil section 52 through the first oil passage hole 531. Similarly, the third limiting groove 3331 can limit the movement of the third slider 332 and prevent oil on the third track 333 from leaking from the edge of the third track 333. The oil in the third limiting groove 3331 can flow into the first oil passage hole 531 through the second oil passage hole 532. On the other hand, within the projection of the turning center in the height direction, the projection surface of the second oil passage hole 532 is located within the projection surface of the second limiting groove 3231. One advantage of this arrangement is that no matter how the third hydrostatic guide rail 33 moves on the second hydrostatic guide rail 32, the oil on the third hydrostatic guide rail 33 can always flow into the second limiting groove 3231 after passing through the second oil passage hole 532. This prevents the oil in the second oil passage hole 532 from flowing directly out from the edge of the second hydrostatic guide rail 32, which would ultimately contaminate other parts of the turning center. Furthermore, the oil will not accumulate on the third hydrostatic guide rail 33, thus preventing the oil from being contaminated.

[0060] Furthermore, a plurality of first oil inlets 101 are provided on the outer side of the base 10, and each first oil inlet 101 is connected to the second oil return section 52. The turning center also includes a plurality of first plugs 61, and each first plug 61 is selectively and detachably set to correspond one-to-one with each first oil inlet 101.

[0061] Specifically, each first oil inlet 101 is spaced apart on the outer periphery of the turning center. The arrangement of multiple first oil inlets 101 and multiple first plugs 61 can improve the adaptability of the turning center to a certain extent. That is to say, depending on the actual installation position of the turning center, the oil in the second oil return section 52 can be discharged through one or more selected first oil inlets 101, while the remaining first oil inlets 101 are sealed by the first plugs 61 to prevent oil from flowing out from other unselected first oil inlets 101. For example, when the back of the turning center is installed against a wall, the first oil inlets 101 on the side against the wall can be sealed by the first plugs, while the first oil inlets 101 not blocked by the wall can be selectively left open.

[0062] In some embodiments, a plurality of second oil inlets 211 are provided on the outer side of the support base 21, and each second oil inlet 211 is connected to the first oil return section 51. The turning center also includes a plurality of second plugs 62, and each second plug 62 is selectively and detachably provided in correspondence with each second oil inlet 211.

[0063] It is worth mentioning that, in some embodiments, when only the first hydrostatic guide rail 31 is used to control the tool holder 22, the oil in the first return oil section 51 can be allowed to flow out through the second oil inlet 211 by opening the second oil inlet 211. Similarly, depending on the needs, specific second oil inlets 211 can be opened, while the remaining second oil inlets 211 are closed through the second return oil section 52. In addition, in some embodiments, regardless of whether the second oil inlet 211 is open or not, the oil leaking from the first hydrostatic guide rail 31 can always enter the oil passage section 53 through the first return oil section 51. One purpose of this design is that regardless of whether the second blockage member 62 is damaged, the oil leaking from the first hydrostatic guide rail 31 can always be discharged through the first return oil section 51.

[0064] Additionally, it is understandable that when the load on the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30 is too high, the oil film needs to remain rigid, requiring an increase in the oil flow rate supplied to the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30. At this time, the amount of oil leaking from the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30 also increases. Since the radius of the return oil channel 50 is fixed, more of the first oil inlet 101 and the second oil inlet 211 can be opened to prevent the oil from failing to drain through the return oil channel 50 in a timely manner.

[0065] Furthermore, the top of the base 10 has a second surface 102, the top of the support 21 has a first surface 212, and the first hydrostatic guide rail 31 is disposed on the first surface 212, the first surface 212 being inclined to the second surface 102. The first hydrostatic guide rail 31 has a first oil return port 31311, which communicates with the oil return channel 50, and the first oil return port 31311 is located on the side of the first hydrostatic guide rail 31 closer to the second surface 102.

[0066] In this embodiment, the first surface 212 is inclined relative to the second surface 102, allowing leaked oil from the first hydrostatic guide rail 31 to move along the inclined first hydrostatic guide rail 31 under the influence of gravity, i.e., moving along the direction of the first surface 212 towards the second surface 102. When the oil flows into the first return port 31311, it can enter the return channel 50 through the first return port 31311. This configuration can, to a certain extent, prevent oil accumulation in the first hydrostatic guide rail 31, thereby avoiding affecting the movement accuracy of the first slider 312 on the first track 313.

[0067] In some embodiments, the first hydrostatic guide rail 31 includes a first track 313, a first slider 312, and a first support platform 311. The first track 313 is disposed on the first surface 212, and a first limiting groove 3131 is formed on the first track 313. A first oil return port 31311 is disposed in the first limiting groove 3131. The first slider 312 is slidably disposed in the first limiting groove 3131, and the first support platform 311 is fixedly disposed on the first slider 312. Similarly, the first limiting groove 3131 is used to limit the oil in the first slider 312 and the first track 313, preventing the oil in the first slider 312 and the first track 313 from detaching from the outer edge of the first track 313. The tool holder 22 is disposed on the first support platform 311. The first slider 312 drives the first support platform 311 to slide within the first track 313, thereby changing the relative position of the tool holder 22 on the turning center. The arrangement of the first hydrostatic guide rail 31, the second hydrostatic guide rail 32 and the third hydrostatic guide rail 33 allows the tool holder 22 to move freely in space, thereby improving the flexibility of the turning center to a certain extent.

[0068] Furthermore, a fourth hydrostatic guide rail 34 is provided on the top of the base 10, and a second oil return port 3411 is provided on the fourth hydrostatic guide rail 34, which is connected to the oil return channel 50. The turning center also includes a spindle assembly 40, which is at least partially disposed on the fourth hydrostatic guide rail 34.

[0069] Specifically, the fourth hydrostatic guide rail 34 and the second hydrostatic guide rail 32 are arranged side by side, that is, the fourth hydrostatic guide rail 34 extends along the first direction of the base 10. The spindle assembly 40 includes a first spindle 41 and a second spindle 42. The first spindle 41 is fixedly mounted on the base 10 and located at the first end of the fourth hydrostatic guide rail 34 along the first direction of the base 10. The second spindle 42 is slidably mounted on the fourth hydrostatic guide rail 34. During machining, the second spindle 42 can be moved to one end of the first spindle 41 and, together with the first spindle 41, is used to fix the workpiece to be machined. At this time, the tool holder 22 moves to a specific position under the action of the first hydrostatic guide rail 31, the second hydrostatic guide rail 32, and the third hydrostatic guide rail 33 to machine the workpiece. In this embodiment, a fourth limiting groove 341 is formed on the fourth hydrostatic guide rail 34, and a second oil return port 3411 is disposed within the fourth limiting groove 341. That is, after oil leaks from the fourth hydrostatic guide rail 34, it can be limited within the fourth limiting groove 341, and finally enter the oil return channel 50 through the second oil return port 3411. In addition, by setting the first hydrostatic guide rail 31, the second hydrostatic guide rail 32, the third hydrostatic guide rail 33, and the fourth hydrostatic guide rail 34 in this embodiment, the machining accuracy and load-bearing capacity of the turning center can be significantly improved.

[0070] In some embodiments, the spindle assembly 40 includes a hydrostatic spindle, and at least one end of the oil return channel 50 extends to the hydrostatic spindle, meaning that oil leaking from the hydrostatic spindle can also be discharged through the oil return channel 50.

[0071] In summary, the turning center of this application, by incorporating an oil return channel 50 within the base 10, the hydrostatic guide rail assembly 30, the tool post assembly 20, and the first hydrostatic guide rail 31, allows leaked oil from the hydrostatic guide rail assembly 30 and the first hydrostatic guide rail 31 to be discharged through the internal oil return channel 50. This prevents oil from contaminating the turning center, accumulating on the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30, or reusing contaminated oil, thereby affecting the machining accuracy and stability of the turning center. Furthermore, since the oil return channel 50 is located internally within the turning center, there is no need for external oil return pipes on the first hydrostatic guide rail 31 and the hydrostatic guide rail assembly 30, thus reducing the overall size and manufacturing cost of the turning center to some extent. On the other hand, the design of the first oil return section 51, the oil passage section 53, and the second oil return section 52 simplifies the oil return method of the turning center and increases the flexibility of the hydrostatic guide rail assembly 30. In addition, a first limiting groove 3131, a second limiting groove 3231, a third limiting groove 3331, and a fourth limiting groove 341 are respectively provided on the first hydrostatic guide rail 31, the second hydrostatic guide rail 32, the third hydrostatic guide rail 33, and the fourth hydrostatic guide rail 34. These not only limit the sliders on each guide rail, but also limit the leakage of oil in each hydrostatic guide rail, thereby preventing oil from flowing directly out from the outer edge of each hydrostatic guide rail and causing oil contamination of the turning center.

[0072] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0073] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0074] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A turning center, characterized in that, include: A base (10) is provided with a hydrostatic guide rail assembly (30) on its top; Tool holder assembly (20), the tool holder assembly (20) includes a support base (21) and a tool holder (22), the support base (21) is slidably disposed on the hydrostatic guide rail assembly (30), the top of the support base (21) is provided with a first hydrostatic guide rail (31), and the tool holder (22) is slidably disposed on the first hydrostatic guide rail (31); Oil return channel (50) is provided in the base (10) and the support seat (21). At least one end of the oil return channel (50) passes through the hydrostatic guide rail assembly (30), the support seat (21) and the first hydrostatic guide rail (31) in sequence. At least the other end of the oil return channel (50) extends to the outer peripheral surface of the base (10).

2. The turning center according to claim 1, characterized in that, The return oil channel (50) includes: The first oil return section (51) is disposed in the support base (21), at least one end of the first oil return section (51) extends to the first hydrostatic guide rail (31), and at least the other end of the first oil return section (51) extends to the hydrostatic guide rail assembly (30). The second oil return section (52) is connected to the first oil return section (51). The second oil return section (52) is disposed in the base (10). At least one end of the second oil return section (52) extends to the hydrostatic guide rail assembly (30), and at least the other end of the second oil return section (52) extends to the outer side of the base (10).

3. The turning center according to claim 2, characterized in that, The oil return channel (50) also includes an oil passage section (53), which is located within the hydrostatic guide rail assembly (30). The two ends of the oil passage section (53) are respectively connected to the first oil return section (51) and the second oil return section (52).

4. The turning center according to claim 3, characterized in that, The hydrostatic guide rail assembly (30) includes: The second hydrostatic guide rail (32) is disposed on the top of the base (10). The second hydrostatic guide rail (32) extends along the first direction of the base (10). A first oil passage hole (531) is provided through the second hydrostatic guide rail (32). The third hydrostatic guide rail (33) is slidably disposed on the second hydrostatic guide rail (32). The third hydrostatic guide rail (33) extends along a second direction, which is perpendicular to the first direction and the height direction of the turning center. A second oil passage hole (532) is provided through the third hydrostatic guide rail (33). The first oil passage (531) and the second oil passage (532) are interconnected and form the oil passage section (53).

5. The turning center according to claim 4, characterized in that, The second hydrostatic guide rail (32) includes a second track (323), a second slider (322), and a second support platform (321). The second track (323) is fixed to the base (10) and extends along the first direction. The second slider (322) is slidably disposed on the second track (323). The second support platform (321) is fixedly disposed on the second slider (322). The first oil passage (531) passes through the second support platform (321), the second track (323), and the second slider (322); and / or, The third hydrostatic guide rail (33) includes a third track (333), a third slider (332), and a third support platform (331). The third track (333) is fixed to the second hydrostatic guide rail (32) and extends along the second direction. The third slider (332) is slidably disposed on the third track (333). The third support platform (331) is fixedly disposed on the third slider (332). The second oil passage (532) passes through the third support platform (331), the third track (333), and the third slider (332).

6. The turning center according to claim 4, characterized in that, The second hydrostatic guide rail (32) is provided with a second limiting groove (3231), and the first oil passage hole (531) is at least partially inserted through the second limiting groove (3231). The third hydrostatic guide rail (33) is provided with a third limiting groove (3331), and the second oil passage hole (532) is at least partially inserted through the third limiting groove (3331). In the projection of the second oil passage hole (532) in the height direction of the turning center, the projection surface of the second oil passage hole (532) is located in the projection surface of the second limiting groove (3231).

7. The turning center according to any one of claims 2 to 6, characterized in that, The outer surface of the base (10) is provided with a plurality of first oil inlets (101), each of which is connected to the second oil return section (52). The turning center also includes a plurality of first plugs (61), each of which is selectively and detachably provided in correspondence with each of the first oil inlets (101); and / or, The outer side of the support base (21) is provided with a plurality of second oil inlets (211), each of the second oil inlets (211) being connected to the first oil return section (51). The turning center also includes a plurality of second plugs (62), each of the second plugs (62) being selectively and detachably configured to correspond one-to-one with each of the second oil inlets (211).

8. The turning center according to any one of claims 1 to 6, characterized in that, The base (10) has a second surface (102) on its top, the support (21) has a first surface (212) on its top, the first hydrostatic guide rail (31) is disposed on the first surface (212), and the first surface (212) is inclined to the second surface (102). The first hydrostatic guide rail (31) is provided with a first oil return port (31311), which is connected to the oil return channel (50), and the first oil return port (31311) is located on the side of the first hydrostatic guide rail (31) near the second surface (102).

9. The turning center according to claim 8, characterized in that, The first hydrostatic guide rail (31) includes: A first track (313) is disposed on the first surface (212), and a first limiting groove (3131) is provided on the first track (313). The first oil return port (31311) is disposed in the first limiting groove (3131). A first slider (312) is slidably disposed in the first limiting groove (3131); a first support platform (311) is fixedly disposed in the first slider (312).

10. The turning center according to any one of claims 1 to 6, characterized in that, The base (10) is also provided with a fourth hydrostatic guide rail (34) on its top. The fourth hydrostatic guide rail (34) is provided with a second oil return port (3411) which is connected to the oil return channel (50). The turning center also includes a spindle assembly (40), which is at least partially disposed on the fourth hydrostatic guide (34).

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