A ram internal pipeline anti-winding device for a numerical control machining center

Abstract

The utility model discloses a kind of slide ram internal pipeline anti-winding devices for numerical control machining center, it is related to numerical control machine tool technical field.The device includes rotary distribution unit, fixed support structure and floating support structure.Fixed support structure connects rotary distribution unit with main shaft or swing head, can be adjusted shape and mounting hole position according to swing head model;Floating support structure is cooperated with the tolerance of connecting rod through transition structure, realize main shaft axis direction floating and tangential limit;Rotary distribution unit contains rotor, stator, bearing, sealing ring, pipe joint etc., realize the separation of rotary and fixed part and fluid transmission.The device can effectively prevent pipeline winding, kink and abrasion, compact structure, strong adaptability, high reliability, can significantly improve the operation stability of numerical control machining center, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to an anti-winding device for internal pipelines of the slide ram in a CNC machining center, especially an anti-winding device for internal pipelines of the slide ram or spindle box in a vertical, horizontal or five-axis machining center with a rotating spindle or swivel head, and a method for preventing their winding. Background Technology

[0002] In modern manufacturing, CNC machining centers are widely used in the processing of complex parts due to their high precision, high efficiency, and high degree of automation. In particular, five-axis machining centers, whose spindles or oscillating heads are typically capable of rotating continuously more than 360° around one or more axes (such as the B-axis and C-axis), can achieve precision machining of complex curved surfaces.

[0003] To meet the diverse functional requirements of spindle rotation, coolant supply, hydraulic chuck release, pneumatic tool change, and signal transmission, a large number of hydraulic oil pipes, coolant pipes, air pipes, cables, and other pipelines need to be routed from the machine tool's electrical cabinet, air cabinet, water chiller, and other equipment to the rotating spindle or oscillating head. These pipelines typically need to pass through the internal space of the ram or spindle box to achieve a compact layout and protect the pipelines.

[0004] However, when the spindle or oscillating head rotates continuously, the tubing inside the slide or spindle box will move relative to the components as they rotate. This relative movement can easily cause the tubing to become tangled or twisted, and at the same time, frequent friction will occur between the tubing and between the tubing and the inner wall of the housing.

[0005] This not only causes premature wear and rupture of pipelines, leading to leaks of fluids such as oil, water, and gas, but can also cause signal transmission interruptions, resulting in equipment failures and downtime, severely impacting production efficiency. In extreme cases, pipeline failure can even lead to processing accidents or safety incidents, causing huge economic losses. Furthermore, frequent pipeline replacements significantly increase equipment maintenance costs and time.

[0006] In existing technologies, to solve this problem, a through-wall mounting plate is often installed inside the ram or spindle box, with a relatively long pipeline length reserved to allow the pipeline to twist freely. However, this method has obvious drawbacks: the excessively long pipeline will occupy valuable space inside the ram or spindle box, increase the self-weight and oscillation inertia of the pipeline bundle, and does not fundamentally solve the problems of pipeline entanglement, kinking, and friction, but only alleviates the tension and compression of the pipeline to a certain extent.

[0007] Therefore, there is an urgent need in the field for a device and method that is compact in structure, reliable in operation, and can effectively prevent the internal tubing of the ram or spindle box from tangling, twisting, and wearing during the rotation of the spindle or oscillating head. Utility Model Content

[0008] In view of the shortcomings of existing technologies, such as easy entanglement, kinking, and wear of pipeline bundles, which lead to frequent equipment failures, high maintenance costs, and large space occupation, the technical problem to be solved by this utility model is to provide a device and corresponding method that is compact in structure, highly adaptable, reliable in operation, and can effectively prevent the entanglement, kinking, and wear of pipelines inside the slide of a CNC machining center.

[0009] To achieve the above objectives, this utility model provides an anti-entanglement device for internal pipelines of a slide block in a CNC machining center, comprising a rotary distribution unit, a fixed support structure, and a floating support structure.

[0010] The fixed support structure is used to connect the rotary distribution unit to the spindle or oscillating head, and its shape and mounting hole positions can be changed according to the oscillating head model to adapt to different models and brands of oscillating heads or spindles, thereby improving the versatility and adaptability of the device.

[0011] The floating support structure includes a transition structure mounted on the slide and a connecting rod mounted on the rotary distribution unit. These two components are fitted with tolerances to achieve floating in the spindle axis direction and tangential positioning. Its function is to allow the tubing bundle to move slightly axially to compensate for changes in tubing length caused by temperature variations or mechanical deformation, preventing tubing damage. Simultaneously, it provides radial support, reducing the sway amplitude of the tubing bundle during torsion and lowering the risk of collision and friction with the inner wall of the slide and other surrounding structures.

[0012] The rotary distribution unit includes a rotor that rotates with the main shaft or oscillating head, a stator connected to the slide block via a floating support structure, bearings and locking nuts for relative movement between the stator and rotor, sealing rings and plugs for separating the fluid channels, and pipe fittings for connecting the various pipelines. Its core function is to separate the rotational motion of the main shaft or oscillating head from the fixed pipeline bundle, allowing the fluid to be stably delivered to the main shaft or oscillating head through the flow channels of the rotary distribution unit.

[0013] As a preferred embodiment, the sealing ring is a friction-resistant and highly sealing rotary sealing ring to ensure the sealing performance between the fluid channels during the relative rotation of the stator and rotor, and to prevent fluid leakage.

[0014] As a preferred option, the pipe fitting is an R-threaded fitting with sealant to further ensure the sealing of the fluid during transmission and prevent leakage.

[0015] Furthermore, the fixed support structure is provided with a cable rotary joint for connecting non-fluid cable lines to realize electrical signal transmission between the rotating part and the fixed part.

[0016] Furthermore, the fixed support structure is equipped with an electrical protective cover to protect electronic components from damage by dust, liquids, etc., thereby improving the reliability of the device.

[0017] Furthermore, the rotor is connected to swing heads or main shafts of different models and brands through a fixed support structure, enhancing the versatility of the device.

[0018] The transition structure of the floating support structure includes a mounting base, a floating support, and an adjustment mechanism. The mounting base is fixed on the slide block, and the floating support is connected to the mounting base through the adjustment mechanism. The connecting rod cooperates with the floating support, and the position of the floating support can be adjusted through the adjustment mechanism to adapt to different working conditions.

[0019] This utility model also provides a method for preventing the internal pipelines of the slide of a CNC machining center from becoming entangled, using the device described in any of the above-mentioned embodiments, and comprising the following steps:

[0020] Connect the fixed support structure to the spindle or oscillating head, and adjust the shape and mounting hole position of the fixed support structure according to the oscillating head model to ensure a stable and suitable connection.

[0021] The rotor of the rotary distribution unit rotates with the main shaft or oscillating head, the stator is connected to the slide block through a floating support structure, the relative movement between the stator and the rotor is achieved by bearings, the fluid channels are separated by sealing rings, and the pipe joints are connected to the corresponding pipelines.

[0022] The transition structure of the floating support structure and the connecting rod are fitted with tolerances to achieve floating in the direction of the main shaft axis and tangential limiting, compensate for changes in pipeline length and provide radial support.

[0023] Furthermore, the fluid enters through the pipe joint on the stator, flows through the fluid channel between the stator and the rotor, and flows out through the pipe joint on the rotor to the various functional modules of the oscillating head, thus achieving stable fluid transmission.

[0024] Furthermore, non-fluid cable lines are connected via cable rotary joints on a fixed support structure, and electronic components are protected by electrical protective covers to ensure stable electrical signal transmission and the safety of electronic components.

[0025] In a preferred embodiment of this invention, multiple independent fluid channels are machined between the stator and rotor of the rotary distribution unit. Each channel corresponds to an independent inlet and outlet, and a sealing ring is used to achieve a reliable seal between the channels to prevent mixing and leakage between different fluids.

[0026] In another preferred embodiment of this utility model, the adjustment mechanism of the floating support structure adopts a bolt adjustment method. By rotating the bolt, the position of the floating support can be precisely adjusted to ensure that the fit clearance between the connecting rod and the floating support is in the best state, so as to realize floating in the axial direction and effectively limit tangential displacement.

[0027] The technical effects of this utility model are as follows:

[0028] (1) Effectively prevents pipeline entanglement: The rotational motion of the main shaft or the oscillating head is separated from the fixed pipeline bundle by the rotational distribution unit, so that the pipeline in the rotating part rotates with the main shaft or the oscillating head, while the pipeline in the fixed part remains stationary, fundamentally eliminating the possibility of entanglement and kinking of the pipeline bundle itself.

[0029] (2) Reduced wear: The floating support structure provides radial support, which reduces the swing amplitude of the pipeline harness during the torsion process and reduces the risk of collision and friction between the pipeline harness and the surrounding structure such as the inner wall of the slide block; at the same time, the friction-resistant rotary seal ring and the R-threaded joint with sealant also reduce the wear of the sealing parts and the connection parts, and extend the service life of the pipeline and the device.

[0030] (3) Compact structure: The integrated design of the rotating distribution unit, fixed support structure and floating support structure, as well as the reasonable control of pipeline length, greatly saves the space inside the slide block and overcomes the defects of excessively long pipelines occupying a lot of space in the existing technology.

[0031] (4) Strong adaptability: The fixed support structure can be changed in shape and mounting hole position according to the model of the swivel head. The rotor can be connected to different models and brands of swivel heads or spindles through the fixed support structure, which is suitable for a variety of CNC machining centers and has strong versatility.

[0032] (5) High reliability: The use of friction-resistant and highly sealing rotary sealing rings, R-threaded joints with sealant, and electrical protective covers ensures the sealing of fluid transmission and the safety of electronic components, reducing leakage and failure; the cable rotary joint ensures stable connection and signal transmission of non-fluid cable lines.

[0033] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0035] Figure 2 This is a cross-sectional structural diagram of a preferred embodiment of the present invention;

[0036] Figure 3 This is an assembly diagram of a preferred embodiment of the present invention used in the swing head;

[0037] Figure 4 This is a partially enlarged view of the rotary distribution unit of a preferred embodiment of the present invention, showing the shape of the fluid channel and the sealing structure;

[0038] Figure 5 This is a partial enlarged view of the floating support structure of a preferred embodiment of the present invention.

[0039] The components are: 1. Swing head (or spindle); 2. Electrical protective cover; 3. Connecting rod; 4. Rotor; 5. Stator; 6. Electrical components; 7. Fixed support structure; 8. Floating support structure; 81. Mounting base; 82. Floating support; 83. Adjustment mechanism; 9. Locking nut; 10. Sealing ring; 11. Bearing; 12. Plug; 13. Pipe joint. Detailed Implementation

[0040] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0041] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0042] like Figure 1 As shown, a preferred embodiment of this utility model includes a swing head (or main shaft) 1, an electrical protective cover 2, a connecting rod 3, a fixed support structure 7, and a floating support structure 8. The fixed support structure 7 is connected to the swing head (or main shaft) 1, and the electrical protective cover 2 is installed on the fixed support structure 7 to protect the internal electrical components 6. One end of the connecting rod 3 is connected to the rotation distribution unit, and the other end cooperates with the floating support structure 8. The floating support structure 8 is fixed on the slide block to provide stable support for the entire device.

[0043] like Figure 2As shown in the cross-sectional view, the internal structure of the rotary distribution unit is illustrated. The rotary distribution unit includes a rotor 4, a stator 5, a bearing 11, a locking nut 9, a sealing ring 10, a plug 12, and a pipe connector 13. The rotor 4 is connected to the swing head (or main shaft) 1 via a fixed support structure 7 and can rotate with the swing head (or main shaft) 1. The stator 5 is connected to the rotor 4 via the bearing 11 and can remain stationary relative to the rotor 4. The locking nut 9 is installed below the stator 5 to fix the bearing 11 and prevent it from dislodging during rotation. The sealing ring 10 is positioned between the contact surfaces of the stator 5 and the rotor 4 to separate different fluid channels. The plug 12 is installed on the stator 5 to seal any process holes left during processing, preventing fluid leakage. The pipe connector 13 is installed on both the stator 5 and the rotor 4 to connect corresponding pipelines.

[0044] like Figure 3 As shown in the diagram, the assembly relationship between the device and the swing head (or spindle) 1 is illustrated in the assembly diagram of the swing head used in this utility model. The fixed support structure 7 is securely connected to the swing head (or spindle) 1 by screws or other connecting parts. The rotor 4 of the rotation distribution unit rotates synchronously with the swing head (or spindle) 1. The stator 5 is kept relatively fixed to the slide by the floating support structure 8, thereby realizing the separation of the rotating part and the fixed part.

[0045] like Figure 4 As shown in the enlarged view of the rotary distribution unit, the shape of the fluid channels and the sealing structure are clearly displayed. Multiple independent fluid channels are machined on the contact surfaces of the stator 5 and rotor 4. These channels are strictly separated by sealing rings 10 to ensure that the fluid is transmitted within its respective channel without mixing or leakage. The pipe fitting 13 is tightly connected to the stator 5 and rotor 4, using an R-threaded fitting with sealant, further ensuring the sealing of the fluid transmission.

[0046] like Figure 5 As shown in the enlarged view, the floating support structure 8 comprises a mounting base 81, a floating support 82, and an adjustment mechanism 83. The mounting base 81 is securely mounted on the slide block using screws or other fasteners. The floating support 82 is connected to the mounting base 81 via the adjustment mechanism 83, which can be a bolt or similar structure. The position of the floating support 82 can be changed by adjusting the tightness of the bolts. One end of the connecting rod 3 is connected to the stator 5 of the rotary distribution unit, and the other end engages with the floating support 82. Through precise tolerance matching, the two achieve floating in the spindle axis direction and tangential positioning.

[0047] The specific working process of this utility model is described in detail below with reference to the above-mentioned accompanying drawings:

[0048] like Figure 1 and Figure 3As shown, during installation, first connect the fixed support structure 7 to the main shaft or oscillating head 1 using screws or other connectors. Adjust the shape and mounting hole positions of the fixed support structure 7 according to the model of the oscillating head 1 to ensure a stable and compatible connection. Install the electrical components 6 on the fixed support structure 7 and cover them with the electrical protective cover 2 to protect the electrical components 6 from damage by dust, liquids, etc.

[0049] Next, assemble the rotation distribution unit: install bearing 11 between stator 5 and rotor 4, and secure bearing 11 with lock nut 9 to prevent it from coming off during rotation; install sealing ring 10 between the contact surfaces of stator 5 and rotor 4 to ensure the separation of each fluid channel; install plug 12 on the process hole of stator 5 to complete the assembly of stator 5 and rotor 4. Then, connect rotor 4 to swing head (or main shaft) 1 through fixed support structure 7, so that rotor 4 can rotate together with swing head (or main shaft) 1; connect stator 5 to floating support structure 8 through connecting rod 3.

[0050] Then, install the floating support structure 8: securely install the mounting base 81 on the slide block with screws and other fasteners, and adjust the position of the floating support 82 by adjusting the adjustment mechanism 83 so that the connecting rod 3 and the floating support 82 form a suitable tolerance fit, which can realize both the floating in the direction of the spindle axis and the tangential limit.

[0051] When connecting pipelines, the pipelines from the hydraulic station, gas holder or water chiller outside the slide block are connected to the pipe joint 13 on the stator 5, and the pipelines from the swing head 1 are connected one-to-one with the pipe joint 13 on the rotor 4; non-fluid cable lines are connected through the cable rotary joint on the fixed support structure 7 to realize the transmission of electrical signals.

[0052] During operation, when the oscillating head (or main shaft) 1 rotates (e.g., around the C-axis), the fixed support structure 7 connected to the oscillating head (or main shaft) 1 and the rotor 4 of the rotation distribution unit rotate synchronously with the oscillating head (or main shaft) 1. Since the stator 5 is connected to the slide via the floating support structure 8, and the slide is relatively fixed, the stator 5 remains relatively stationary, and the rotor 4 rotates freely around the stator 5, thus realizing the relative movement between the rotating part and the fixed part.

[0053] Fluids (such as hydraulic oil, coolant, compressed air, etc.) enter the stator 5 through the pipe joint 13 on the stator 5 via pipelines, flow along the pre-machined fluid channel between the stator 5 and the rotor 4, and then flow out from the pipe joint 13 on the rotor 4. Finally, they are input into the various functional modules of the swing head 1 through pipelines to provide power and medium for the various functions of the swing head 1.

[0054] During the rotation of the oscillating head 1, the floating support structure 8 plays an important role: the tolerance fit between the connecting rod 3 and the floating support 82 allows the stator 5 to float slightly in the direction of the main shaft axis to compensate for changes in pipeline length caused by temperature changes or mechanical deformation, and to prevent the pipeline from being pulled. At the same time, this fit restricts the tangential displacement of the stator 5, provides radial support, reduces the swing amplitude of the pipeline bundle during the torsion process, and reduces the risk of collision and friction between the pipeline bundle and the inner wall of the slide block and other surrounding structures.

[0055] Non-fluid lines such as cables are connected to the fixed part through the cable rotary joint on the fixed support structure 7, which ensures the stable transmission of electrical signals when the swing head (or spindle) 1 rotates. The electrical protective cover 2 provides effective protection for the cable rotary joint and electrical components 6.

[0056] This invention, through the above-described structure and working process, completely separates the rotational motion from the fixed pipeline harness, fundamentally solving the problems of pipeline harness entanglement and kinking. At the same time, it reduces pipeline wear, improves equipment reliability, lowers maintenance costs, and has a compact structure and strong adaptability, making it suitable for various CNC machining centers.

[0057] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A ram internal piping anti-entangling device for a numerical control machining center, characterized by, The system includes a rotary distribution unit, a fixed support structure, and a floating support structure. The fixed support structure connects the rotary distribution unit to the main shaft or the oscillating head, and its shape and mounting hole positions can be changed according to the oscillating head model. The floating support structure includes a transition structure mounted on the slide and a connecting rod mounted on the rotary distribution unit. The two are fitted with tolerances to achieve floating in the axial direction of the main shaft and tangential positioning. The rotary distribution unit includes a rotor that rotates with the main shaft or the oscillating head, a stator connected to the slide via the floating support structure, bearings and locking nuts for relative movement between the stator and the rotor, sealing rings and plugs for separating the fluid channels, and pipe fittings for connecting the various pipelines.

2. The ram internal piping anti-entangling device for a CNC machining center according to claim 1, characterized in that, The sealing ring is a friction-resistant and highly sealing rotary sealing ring.

3. The ram internal piping anti-winding device for a CNC machining center according to claim 1, characterized in that, The pipe fitting is an R-threaded fitting with sealant.

4. The ram internal piping anti-winding device for a CNC machining center according to claim 1, characterized in that, The fixed support structure is equipped with a cable rotary joint for connecting non-fluid cable lines.

5. The ram internal piping anti-entangling device for a CNC machining center according to claim 1, characterized in that, The fixed support structure is equipped with an electrical protective cover.

6. The ram internal piping anti-entangling device for a CNC machining center according to claim 1, characterized in that, The rotor is connected to swing heads or spindles of different models and brands through a fixed support structure.

7. The ram internal piping anti-winding device for a CNC machining center according to claim 1, characterized in that, The transition structure of the floating support structure includes a mounting base, a floating support, and an adjustment mechanism. The mounting base is fixed on the slide block, the floating support is connected to the mounting base through the adjustment mechanism, and the connecting rod cooperates with the floating support.

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