A spindle mounting structure for a CNC four-spindle heavy cutting machine

Abstract

This utility model provides a spindle mounting structure for a CNC four-spindle heavy-duty cutting machine, comprising: a gantry frame, a Z-axis mounting plate mounted on the gantry frame, and multiple independently configured cutting spindle assemblies mounted on the Z-axis mounting plate. Each cutting spindle assembly includes two parallel, spaced-apart Z-axis guide rails extending along the Z-axis and mounted on the Z-axis mounting plate. A Z-axis linear module is fixed on the Z-axis guide rails, a Z-axis drive motor is mounted on the top of the Z-axis mounting plate and connected to the Z-axis linear module, and a spindle cutting mechanism is mounted on the Z-axis linear module. This CNC four-spindle heavy-duty cutting machine features an ingenious spindle mounting structure. By supporting only the Z-axis movement of multiple spindles on the gantry frame and excluding X-axis movement, it improves spindle stability during machining, reduces resonance during simultaneous heavy-duty cutting operations, and thus ensures machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, specifically to a spindle mounting structure for a CNC four-spindle heavy cutting machine. Background Technology

[0002] Heavy-duty cutting machines are industrial equipment designed specifically for processing large, high-hardness, or complex workpieces. Their main features are as follows: (1) High structural rigidity: Heavy-duty bed: Made of cast iron, cast steel, or welded steel structure, it has extremely high vibration resistance and stability, ensuring no deformation during processing. Reinforced components: Key components such as guide rails, spindles, and worktables are reinforced to withstand large cutting forces and heavy-duty workpieces. (2) Large-size processing capability: The worktable size can reach several meters to tens of meters, suitable for processing large workpieces (such as ship propellers and wind turbine components). The worktable can bear tens of tons, meeting the clamping requirements of heavy workpieces. (3) High cutting capability: Supports large feed rates and large cutting depths, and can quickly remove materials (such as rough machining of metal castings). It can process high-hardness materials (such as titanium alloys and quenched steel), and is often used in the energy and aerospace fields. (4) High precision and stability: Adopting linear guide rails, hydrostatic guide rails, or roller guide rails, combined with a high-rigidity spindle (such as an electric spindle), it ensures micron-level machining accuracy. Vibration can be reduced through structural optimization or damping devices to avoid rough machined surfaces.

[0003] The core advantages of heavy-duty cutting machines lie in their heavy load capacity, high efficiency, and high precision, making them suitable for machining large, critical components. However, due to these characteristics, heavy-duty cutting machines are generally equipped with only one spindle. For example, patent applications with publication numbers CN103949661A and CN106181429A disclose single-spindle heavy-duty cutting machines. Especially since existing heavy-duty cutting machines require controlling the X and Z axes of the spindle on the same frame, it is difficult for them to pair multiple spindles for independent machining. This is because multiple spindles would cause motion interference during machining, affecting machining accuracy. However, using only a single spindle would significantly reduce machining efficiency. Therefore, how to arrange the spindle mounting structure is a technical problem that needs to be solved in this field. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a spindle mounting structure for a CNC four-spindle heavy cutting machine. The gantry frame only supports the movement of multiple spindles in the Z-axis direction, without moving in the X-axis direction. This reduces motion interference between multiple independent spindles, which helps improve the stability of the spindles during machining and reduces resonance generated when multiple axes perform heavy cutting simultaneously, thereby ensuring machining accuracy.

[0005] To achieve the above technical solution, this utility model provides a spindle mounting structure for a CNC four-spindle heavy-duty cutting machine, comprising: a gantry frame, a Z-axis mounting plate mounted on the gantry frame, multiple independently configured cutting spindle assemblies mounted on the Z-axis mounting plate, each cutting spindle assembly including two parallel, spaced-apart Z-axis guide rails extending along the Z-axis and mounted on the Z-axis mounting plate, a Z-axis linear module fixed on the Z-axis guide rails, a Z-axis drive motor mounted on the top of the Z-axis mounting plate and connected to the Z-axis linear module, a spindle cutting mechanism mounted on the Z-axis linear module, the spindle cutting mechanism including a spindle box fixed on the Z-axis linear module, a spindle body mounted along the Z-axis on the spindle box and facing downwards, a spindle drive motor mounted on the top of the spindle box and connected to the spindle body, and a tool changer chuck mounted on the bottom of the spindle body, with cutting tools mounted on the tool changer chuck.

[0006] In the above technical solution, by setting a complete Z-axis mounting plate, without an X-axis guide rail, only an independent Z-axis guide rail, multiple independently configured spindle cutting mechanisms can be independently controlled in the Z-axis direction through the Z-axis linear module and Z-axis drive motor. Therefore, multiple spindle cutting mechanisms can move independently without motion interference, and the resonance generated during multi-axis simultaneous heavy cutting is reduced, thereby ensuring machining accuracy. Furthermore, to further improve machining stability, this invention sets the spindle cutting mechanism as a direct-drive type, where the spindle drive motor directly drives the spindle body to rotate the cutting tool at high speed, reducing vibration. A tool changer is also included to improve tool changing efficiency, and the multiple spindle cutting mechanisms can process independently, greatly improving production efficiency.

[0007] Preferably, the top front side of the gantry frame protrudes forward, and the Z-axis mounting plate is installed on the forward-protruding part of the gantry frame. In actual operation, this can expand the machining space below the cutting spindle assembly.

[0008] Preferably, a diagonal reinforcing rib is provided below the forward-protruding part on the top front side of the gantry frame to improve the support strength of the gantry frame for the Z-axis mounting plate and the cutting spindle assembly.

[0009] Preferably, a Z-axis limit block is installed at the bottom of the Z-axis guide rail to prevent the Z-axis linear module from driving the spindle cutting mechanism to move beyond the maximum moving position.

[0010] Preferably, both the gantry frame and the Z-axis mounting plate are provided with multiple perforated holes to reduce the weight of the gantry frame and the Z-axis mounting plate and save materials.

[0011] The advantages of the spindle mounting structure of the CNC four-spindle heavy-duty cutting machine provided by this utility model are as follows: The spindle mounting structure of this CNC four-spindle heavy-duty cutting machine is ingeniously designed. By supporting the movement of multiple spindles in the Z-axis direction on the gantry frame, without allowing movement in the X-axis direction, it improves the stability of the spindles during machining and reduces resonance generated when multiple axes are simultaneously performing heavy-duty cutting, thereby ensuring machining accuracy. In actual operation, by setting up a complete Z-axis mounting plate, without X-axis guide rails, only independent Z-axis guide rails are provided. Multiple independently configured spindle cutting mechanisms can be independently controlled in the Z-axis direction through the Z-axis linear module and Z-axis drive motor. Therefore, multiple spindle cutting mechanisms can move independently without motion interference, reducing resonance generated when multiple axes are simultaneously performing heavy-duty cutting, thus ensuring machining accuracy. Furthermore, to further improve machining stability, this invention sets the spindle cutting mechanism as a direct-drive type, where the spindle drive motor can directly drive the spindle body to rotate the cutting tool at high speed, which can reduce vibration. At the same time, a tool changer is provided to improve tool changing efficiency. Moreover, multiple spindle cutting mechanisms can process independently, greatly improving production efficiency. Attached Figure Description

[0012] Figure 1 This is a front view of the present invention.

[0013] Figure 2 This is a side view of the present invention.

[0014] Figure 3 This is a cross-sectional view of the present invention.

[0015] In the diagram: 100, Gantry frame; 200, Z-axis mounting plate; 300, Cutting spindle assembly; 310, Z-axis guide rail; 320, Z-axis linear module; 330, Z-axis drive motor; 340, Z-axis limit block; 350, Spindle cutting mechanism; 351, Spindle box; 352, Spindle drive motor; 353, Spindle body; 354, Tool changer chuck; 355, Cutting tool. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: A spindle mounting structure for a CNC four-spindle heavy cutting machine.

[0018] Reference Figures 1 to 3As shown, a spindle mounting structure for a CNC four-spindle heavy-duty cutting machine includes: a gantry frame 100, the top front side of which protrudes forward, and a Z-axis mounting plate 200 installed on the forward-protruding part of the gantry frame 100. During actual operation, this expands the machining space below the cutting spindle assembly 300. Four independently configured cutting spindle assemblies 300 are mounted on the Z-axis mounting plate 200. An oblique reinforcing rib is provided below the forward-protruding part on the top front side of the gantry frame 100 to improve the support strength of the gantry frame 100 for the Z-axis mounting plate 200 and the cutting spindle assemblies 300. Both the gantry frame 100 and the Z-axis mounting plate 200 have multiple perforations to reduce their weight and save materials.

[0019] The cutting spindle assembly 300 includes two parallel, spaced-apart Z-axis guide rails 310 extending along the Z-axis and mounted on a Z-axis mounting plate 200. A Z-axis linear module 320 is fixed on the Z-axis guide rails 310. A Z-axis drive motor 330 is mounted on the top of the Z-axis mounting plate 200 and connected to the Z-axis linear module 320. A spindle cutting mechanism 350 is mounted on the Z-axis linear module 320. In actual operation, the Z-axis linear module 320 can be driven by the Z-axis drive motor 330 to move precisely on the Z-axis guide rails 310. A Z-axis limit block 340 is installed at the bottom of the Z-axis guide rails 310 to prevent the Z-axis linear module 320 from driving the spindle cutting mechanism 350 to move beyond the maximum movement position.

[0020] The spindle cutting mechanism 350 includes a spindle housing 351, which is fixed on the Z-axis linear module 320. A spindle body 353 is mounted on the spindle housing 351 along the Z-axis and faces downwards. A spindle drive motor 352 is mounted on the top of the spindle housing 351 and connected to the spindle body 353. A tool changer chuck 354 is mounted on the bottom of the spindle body 353, and a cutting tool 355 is mounted on the tool changer chuck 354. This invention sets the spindle cutting mechanism 350 as a direct-drive type, allowing the spindle drive motor 352 to directly drive the spindle body 353 to rotate the cutting tool 355 at high speed, reducing vibration. The tool changer chuck 354 improves tool changing efficiency, and the four spindle cutting mechanisms 350 can process independently, significantly improving production efficiency.

[0021] The spindle mounting structure of this CNC four-spindle heavy-duty cutting machine is ingeniously designed. By supporting the movement of multiple spindles in the Z-axis direction on the gantry frame 100, without any movement in the X-axis direction, it improves the stability of the spindles during machining and reduces resonance caused by simultaneous heavy-duty cutting across multiple axes, thus ensuring machining accuracy. In actual operation, a complete Z-axis mounting plate 200 is set up. The Z-axis mounting plate 200 does not have an X-axis guide rail, but only an independent Z-axis guide rail 310. The four independently configured spindle cutting mechanisms 350 can be independently controlled in the Z-axis direction through the Z-axis linear module 320 and the Z-axis drive motor 330. Therefore, the four spindle cutting mechanisms 350 can move independently without motion interference, reducing resonance caused by simultaneous heavy-duty cutting across four axes and thus ensuring machining accuracy.

[0022] The above description is only a preferred embodiment of the present utility model. However, the present utility model should not be limited to the content disclosed in the embodiment and the accompanying drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit disclosed in the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A spindle mounting structure for a CNC four-spindle heavy-duty cutting machine, characterized in that... include: A gantry frame is provided, on which a Z-axis mounting plate is installed. Multiple independently configured cutting spindle assemblies are mounted on the Z-axis mounting plate. Each cutting spindle assembly includes two parallel, spaced-apart Z-axis guide rails extending along the Z-axis and mounted on the Z-axis mounting plate. A Z-axis linear module is fixed to the Z-axis guide rails. A Z-axis drive motor is mounted on the top of the Z-axis mounting plate and connected to the Z-axis linear module. A spindle cutting mechanism is mounted on the Z-axis linear module. The spindle cutting mechanism includes a spindle box, which is fixed to the Z-axis linear module. A spindle body is mounted on the spindle box along the Z-axis and positioned downwards. A spindle drive motor is mounted on the top of the spindle box and connected to the spindle body. A tool changer is mounted at the bottom of the spindle body, and a cutting tool is mounted on the tool changer.

2. The spindle mounting structure of the CNC four-spindle heavy cutting machine as described in claim 1, characterized in that: The top front side of the gantry frame protrudes forward, and the Z-axis mounting plate is installed on the forward-protruding part of the gantry frame.

3. The spindle mounting structure of the CNC four-spindle heavy cutting machine as described in claim 2, characterized in that: A diagonal reinforcing rib is provided below the forward-protruding part on the top front side of the gantry frame.

4. The spindle mounting structure of the CNC four-spindle heavy cutting machine as described in claim 1, characterized in that, A Z-axis limit block is installed at the bottom of the Z-axis guide rail.

5. The spindle mounting structure of the CNC four-spindle heavy cutting machine as described in claim 1, characterized in that, The gantry frame and the Z-axis mounting plate are both equipped with multiple perforated holes.

Images