A dual-turret vertical turning composite machine tool

Abstract

This utility model relates to a dual-turret vertical turning composite machine tool. It solves the technical problems of insufficient support for the workpiece in existing spindle systems. It includes a machine tool base and a machine tool column vertically mounted on the upper part of the machine tool base. Two power turrets are movably mounted on one side of the machine tool column, and a turret movement drive mechanism is provided between the power turrets and the machine tool column. The power turrets have at least one of turning, milling, and drilling / milling components. An electric spindle is located on the upper part of the machine tool base, with a chuck assembly for clamping the workpiece at its upper end and a brake assembly. A spindle-type center assembly is located on one side of the machine tool column via a tailstock vertical lifting structure. The advantages are: the design of the electric spindle and chuck assembly, the pull-back chuck connected to the rotary cylinder via a pull rod, provides uniform and stable clamping force, enabling high-speed cutting and precision machining; and the spindle-type center assembly, with its height adjustable via the tailstock vertical lifting structure, forms end support with the chuck assembly.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool equipment technology, specifically relating to a double-turret vertical turning composite machine tool. Background Technology

[0002] In modern manufacturing, with the increasing demands for precision and efficiency in parts machining, traditional single-function machine tools are gradually becoming insufficient to meet the needs. To improve machining efficiency, dual-turret vertical lathes have emerged. However, most dual-turret vertical lathes suffer from insufficient spindle system and workpiece support, and their chuck clamping methods are limited, often employing a push-type chuck, which is susceptible to workpiece loosening due to cutting forces. Furthermore, their fixed tailstock structure cannot accommodate the top support requirements of workpieces of varying lengths, leading to vibration, especially in the machining of long shaft parts. Additionally, the spindle's inertial rotation during shutdown affects tool changing safety and positioning accuracy. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a dual-turret vertical turning composite machine tool.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-turret vertical turning composite machine tool, comprising a machine tool base and a machine tool column vertically arranged on the upper end of the machine tool base. Two symmetrically distributed power turrets are movably arranged on one side of the machine tool column. A turret movement drive mechanism is provided between the power turrets and the machine tool column, which can drive the power turrets to move vertically up and down and horizontally along the machine tool column. The power turrets have at least one of turning components, milling components, and drilling and milling components. An electric spindle is provided on the upper end of the machine tool base, located on one side of the machine tool column and between the two power turrets. The upper end of the electric spindle has a chuck assembly for clamping the workpiece, and the electric spindle has a brake assembly. A spindle-type center assembly corresponding to the chuck assembly is provided on one side of the machine tool column via a tailstock vertical lifting structure. The dual-power turret can be equipped with various components such as turning, milling, and drilling. Combined with the electric spindle and spindle-type center assembly, it can complete multiple machining operations such as turning, milling, and drilling in a single setup, significantly reducing the number of workpiece clamping operations, reducing positioning errors, improving machining accuracy and production efficiency. At the same time, it achieves efficient use of space, shortens the transmission distance between various functional components, reduces energy loss and vibration interference during machining, and improves the overall rigidity and stability of the machine tool.

[0005] In the aforementioned dual-turret vertical turning composite machine tool, the chuck assembly includes a pull-back chuck mounted on the upper end of the electric spindle, and a rotary cylinder located at the lower end of the electric spindle. The pull-back chuck is connected to the rotary cylinder via a tie rod passing through the electric spindle. Driving the tie rod connected to the pull-back chuck with the rotary cylinder provides a large and uniform clamping force, effectively preventing workpiece displacement during high-speed rotation and cutting, making it particularly suitable for heavy-duty cutting and high-precision machining scenarios.

[0006] In the aforementioned dual-turret vertical turning composite machine tool, the braking assembly includes a brake bracket whose upper end is connected to the outside of the electric spindle, and whose lower end is connected to a spindle housing located circumferentially outside the electric spindle. The lower end of the brake bracket is provided with brake pads that mate with the lower end face of the electric spindle. The brake pads mate with the end face of the electric spindle, acting directly on the spindle, resulting in fast braking response and precise control of the spindle's stopping position. This is suitable for milling, drilling, and other operations requiring precise stopping and positioning. The integrated brake bracket and spindle housing have a compact structure, protecting internal components and facilitating maintenance of brake pad wear.

[0007] In the aforementioned dual-turret vertical turning composite machine tool, the power turret has several mounting stations on its outer circumferential side, and each mounting station is sequentially equipped with a turning component, a milling component, a drilling and milling component, and a measuring component. Turning, milling, drilling, and measuring operations can be completed without changing machine tools, reducing workpiece turnaround time, improving machining accuracy, completing multiple operations in a single setup, and simultaneously measuring dimensions immediately after machining, providing real-time error feedback, achieving closed-loop machining control, and reducing scrap rate.

[0008] In the aforementioned dual-turret vertical turning composite machine tool, the tailstock vertical lifting structure includes several tailstock lifting rails vertically arranged on one side of the middle of the machine tool column. A slider connected to the tailstock slide is slidably arranged on the tailstock lifting rails. A tailstock screw nut is provided inside the tailstock slide, and a tailstock lifting screw threadedly connected to the tailstock screw nut is inserted inside the tailstock screw nut. The upper end of the tailstock lifting screw is connected to a tailstock lifting motor arranged on the upper end of the machine tool column.

[0009] In the aforementioned dual-turret vertical turning composite machine tool, the spindle-type center assembly includes a tailstock box disposed outside the tailstock slide. The tailstock box houses the spindle-type center body, which has a vertically downward-facing center portion corresponding to the workpiece at its lower end. The spindle-type center body integrates a bearing structure, allowing the center portion to rotate synchronously with the workpiece, reducing frictional heat generation, making it suitable for high-speed turning applications, and preventing scratches on the workpiece surface.

[0010] In the aforementioned dual-turret vertical turning composite machine tool, the turret movement drive mechanism includes a vertical drive structure that can drive the power turret to move vertically up and down along the machine tool column, and a horizontal drive structure that can drive the power turret to move horizontally along the machine tool column.

[0011] In the aforementioned dual-turret vertical turning composite machine tool, the vertical drive structure includes vertical drive slots located at both ends of one side of the machine tool column. A vertical lead screw and nut drive assembly is provided in the vertical drive slot. Vertical rails are provided on both sides of the vertical drive slot. A vertical slide table connected to the vertical lead screw and nut drive assembly is provided on the outside of the vertical drive slot. Several vertical sliders connected to the vertical rails are provided on the side of the vertical slide table near the machine tool column.

[0012] In the aforementioned dual-turret vertical turning composite machine tool, the horizontal drive structure includes a horizontal drive groove disposed on the side of the vertical slide away from the machine tool column, a horizontal lead screw and nut drive assembly disposed in the horizontal drive groove, horizontal linear guides disposed on both sides of the horizontal drive groove, the power turret disposed outside the horizontal drive groove and connected to the horizontal lead screw and nut drive assembly, and a plurality of horizontal sliders connected to the horizontal linear guides disposed on the side of the power turret near the vertical slide.

[0013] In the aforementioned dual-turret vertical turning composite machine tool, a chip removal section is provided on the side of the machine tool base away from the machine tool column. Chip removal grooves are provided at both ends of the chip removal section, each corresponding to a power turret. The chuck assembly is positioned between the two chip removal grooves, and the lower end of the machine tool base is equipped with chip removal mechanisms corresponding to the chip removal grooves. Machining waste falls directly into the chip removal grooves on both sides, preventing accumulation in the machining area and preventing chips from entangled in the tools or scratching the workpiece. Simultaneously, automated chip removal reduces the frequency of manual cleaning, and with the help of a coolant system, wet machining can be achieved, extending tool life.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] 1. This device adopts an electric spindle and chuck assembly design. The pull-back chuck is connected to the rotary cylinder through a pull rod, and the clamping force is uniform and stable. Combined with the high speed and high precision characteristics of the electric spindle, it can realize high-speed cutting and precision machining. At the same time, the spindle-type center assembly adjusts the height through the tailstock vertical lifting structure, forming a two-end support with the chuck assembly, which can withstand large cutting forces and is suitable for machining long shaft parts, avoiding workpiece deformation.

[0016] 2. This device utilizes a braking assembly for rapid braking. The brake pads mate with the lower end face of the electric spindle, enabling rapid braking when the machine stops, reducing inertial errors, and improving repeatability. It is suitable for scenarios with high machining accuracy requirements.

[0017] 3. This device uses dual turrets to work together. The turrets integrate turning, milling, drilling and milling and measuring components, which can complete multiple processes such as turning, milling, drilling and tapping in one clamping. This reduces the error of multiple clamping of the workpiece and improves the processing efficiency and accuracy. At the same time, the symmetrically distributed dual power turrets can process different parts of the workpiece at the same time, or perform parallel operations of different processes, which greatly shortens the processing time of a single piece and is suitable for mass production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a structural schematic diagram of the electric spindle and spindle-type center assembly in this utility model.

[0020] Figure 3 This is a structural cross-sectional view of the electric spindle in this utility model.

[0021] Figure 4 This is an exploded view of the vertical lifting structure of the tailstock in this utility model.

[0022] Figure 5 This is an exploded view of the turret movement drive mechanism in this utility model.

[0023] In the diagram: Machine base 1, Machine column 11, Power turret 12, Horizontal slide block 121, Workpiece 13, Mounting station 14, Chip removal section 15, Chip removal groove 16, Chip removal mechanism 17, Turret movement drive mechanism 2, Vertical drive structure 21, Horizontal drive structure 22, Vertical drive groove 23, Vertical screw and nut drive assembly 24, Vertical linear guide 25, Vertical slide table 26, Vertical slide block 27, Horizontal drive groove 28, Horizontal screw and nut drive assembly 29 30. Horizontal linear guide; 3. Electric spindle; 4. Chuck assembly; 41. Rear pull chuck; 42. Rotary cylinder; 43. Tie rod; 5. Brake assembly; 51. Brake bracket; 52. Spindle cover; 53. Brake pad; 6. Tailstock vertical lifting structure; 61. Tailstock lifting linear guide; 62. Tailstock slide; 63. Slider; 64. Tailstock lead screw nut; 65. Tailstock lifting lead screw; 66. Tailstock lifting motor; 7. Spindle-type center assembly; 71. Tailstock box; 72. Spindle-type center body; 73. Center part. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-5As shown, a dual-turret vertical turning composite machine tool includes a machine tool base 1 and a machine tool column 11 vertically arranged on the upper end of the machine tool base 1. Two symmetrically distributed power turrets 12 are movably arranged on one side of the machine tool column 11. A turret movement drive mechanism 2 is provided between the power turrets 12 and the machine tool column 11, which can drive the power turrets 12 to move vertically up and down and horizontally along the machine tool column 11. The power turrets 12 have at least one of turning components, milling components, and drilling and milling components. An electric spindle 3 is provided on the upper end of the machine tool base 1, located on one side of the machine tool column 11 and between the two power turrets 12. The upper end of the electric spindle 3 has a chuck assembly 4 for clamping workpieces 13 and a brake assembly 5. A spindle-type center assembly 7 corresponding to the chuck assembly 4 is provided on one side of the machine tool column 11 through a tailstock vertical lifting structure 6. The dual-power turret 12 can be equipped with various components such as turning, milling, and drilling. Combined with the electric spindle 3 and the spindle-type center assembly 7, it can complete multiple machining processes such as turning, milling, and drilling in a single setup, significantly reducing the number of workpiece clamping operations, reducing positioning errors, improving machining accuracy and production efficiency. At the same time, it achieves efficient use of space, shortens the transmission distance between various functional components, reduces energy loss and vibration interference during machining, and improves the overall rigidity and stability of the machine tool.

[0026] Combination Figures 1-3 As shown, the chuck assembly 4 includes a pull-back chuck 41 mounted on the upper end of the electric spindle 3, and a rotary cylinder 42 mounted on the lower end of the electric spindle 3. The pull-back chuck 41 is connected to the rotary cylinder 42 via a pull rod 43 passing through the electric spindle 3. By driving the pull rod 43 connected to the pull-back chuck 41 through the rotary cylinder 42, the clamping force is large and uniform, which can effectively prevent the workpiece 13 from shifting during high-speed rotation and cutting, making it especially suitable for heavy-duty cutting and high-precision machining scenarios.

[0027] The braking assembly 5 includes a brake bracket 51 whose upper end is connected to the outer side of the electric spindle 3, and a lower end of the brake bracket 51 connected to a spindle housing 52 located on the outer periphery of the electric spindle 3. The lower end of the brake bracket 51 is provided with a brake pad 53 that mates with the lower end face of the electric spindle 3. The brake pad 53 mates with the end face of the electric spindle 3, acting directly on the electric spindle 3. It provides a fast braking response and precise control of the stopping position of the electric spindle 3, making it suitable for milling, drilling, and other processes requiring precise stopping and positioning. The brake bracket 51 is integrated with the spindle housing 52, resulting in a compact structure that protects internal components and facilitates maintenance of the brake pad 53's wear condition.

[0028] like Figure 5As shown, the power turret 12 has several mounting stations 14 on its outer periphery, and each mounting station 14 is equipped with a turning assembly, a milling assembly, a drilling and milling assembly, and a measuring assembly arranged sequentially. Turning, milling, drilling, and measuring operations can be completed without changing machine tools, reducing workpiece turnaround time, improving machining accuracy, completing multiple operations in a single setup, and simultaneously measuring dimensions immediately after machining, providing real-time error feedback, achieving closed-loop machining control, and reducing scrap rate.

[0029] like Figure 4 As shown, the tailstock vertical lifting structure 6 includes several tailstock lifting rails 61 vertically arranged on one side of the middle of the machine tool column 11. A slider 63 connected to the tailstock slide 62 is slidably arranged on the tailstock lifting rail 61. A tailstock screw nut 64 is provided inside the tailstock slide 62. A tailstock lifting screw 65 threadedly connected to the tailstock screw nut 64 is provided inside the tailstock screw nut 64. The upper end of the tailstock lifting screw 65 is connected to the tailstock lifting motor 66 arranged on the upper end of the machine tool column 11.

[0030] like Figure 2 As shown, the spindle-type center assembly 7 includes a tailstock box 71 disposed outside the tailstock slide 62. The tailstock box 71 contains a spindle-type center body 72, and the lower end of the spindle-type center body 72 has a vertically downward-facing center portion 73 corresponding to the workpiece 13. The spindle-type center body 72 integrates a bearing structure, allowing the center portion 73 to rotate synchronously with the workpiece 13, reducing frictional heat generation, making it suitable for high-speed turning applications, and preventing scratches on the surface of the workpiece 13.

[0031] like Figure 5 As shown, the turret movement drive mechanism 2 includes a vertical drive structure 21 that can drive the power turret 12 to move vertically up and down along the machine tool column 11, and a horizontal drive structure 22 that can drive the power turret 12 to move horizontally along the machine tool column 11.

[0032] Specifically, the vertical drive structure 21 includes vertical drive grooves 23 located at both ends of one side of the machine tool column 11. A vertical lead screw and nut drive assembly 24 is provided inside the vertical drive groove 23. Vertical rails 25 are provided on both sides of the vertical drive groove 23. A vertical slide 26 connected to the vertical lead screw and nut drive assembly 24 is provided on the outside of the vertical drive groove 23. Several vertical sliders 27 connected to the vertical rails 25 are provided on the side of the vertical slide 26 closest to the machine tool column 11.

[0033] The horizontal drive structure 22 includes a horizontal drive groove 28 located on the side of the vertical slide table 26 away from the machine tool column 11. A horizontal lead screw and nut drive assembly 29 is provided in the horizontal drive groove 28. Horizontal linear rails 30 are provided on both sides of the horizontal drive groove 28. The power turret 12 is located outside the horizontal drive groove 28 and is connected to the horizontal lead screw and nut drive assembly 29. Several horizontal sliders 121 connected to the horizontal linear rails 30 are provided on the side of the power turret 12 closest to the vertical slide table 26.

[0034] like Figure 1 As shown, the machine tool base 1 has a chip removal section 15 on the side away from the machine tool column 11. Chip removal sections 15 have chip removal grooves 16 at both ends, each corresponding to a power turret 12. A chuck assembly 4 is positioned between the two chip removal grooves 16, and the lower end of the machine tool base 1 has chip removal mechanisms 17 corresponding to the chip removal grooves 16. Machining waste falls directly into the chip removal grooves 16 on both sides, preventing accumulation in the machining area and preventing chips from entangled in the tool or scratching the workpiece 13. Automated chip removal reduces the frequency of manual cleaning, and with the help of a coolant system, wet machining can be achieved, extending tool life.

[0035] The principle of this embodiment is as follows:

[0036] One end of the workpiece 13 is placed on the pull-back chuck 41, and the rotary cylinder 42 clamps the workpiece 13 through the pull rod 43. The spindle-type center assembly 7 moves downward through the tailstock vertical lifting structure 6 and presses against the other end of the workpiece 13. The electric spindle 3 directly drives the workpiece 13 to rotate, providing the main motion for turning. When the machining is completed or the tool is changed, the brake pad 53 presses the electric spindle 3 under the action of the brake bracket 51. The electric spindle 3 stops quickly due to friction, avoiding the influence of inertia on the positioning accuracy. The two power turrets 12 can each undertake different processes, realizing parallel processing. At the same time, the measuring component can monitor the size of the workpiece 13 in real time during machining and feed it back to the CNC system to automatically compensate for tool wear or correct machining parameters. The chips generated during machining fall into the chip trough 16 by gravity and are transported to the outside of the machine tool by the chip removal mechanism 17 at the lower end.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0038] Although this paper extensively uses the following components: machine tool base 1, machine tool column 11, power turret 12, horizontal slide 121, workpiece 13, mounting station 14, chip removal section 15, chip removal groove 16, chip removal mechanism 17, turret movement drive mechanism 2, vertical drive structure 21, horizontal drive structure 22, vertical drive groove 23, vertical screw and nut drive assembly 24, vertical linear guide 25, vertical slide table 26, vertical slide block 27, horizontal drive groove 28, horizontal screw and nut drive assembly 29, horizontal linear guide 3 The terminology used includes: 0. Electric spindle; 3. Chuck assembly; 4. Rear pull chuck; 41. Rotary cylinder; 42. Tie rod; 43. Brake assembly; 5. Brake bracket; 51. Spindle cover; 52. Brake pad; 53. Tailstock vertical lifting structure; 6. Tailstock lifting rail; 61. Tailstock slide; 62. Slider; 63. Tailstock lead screw nut; 64. Tailstock lifting lead screw; 65. Tailstock lifting motor; 66. Spindle-type center assembly; 7. Tailstock box; 71. Spindle-type center body; 72. Center part, etc. However, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A dual-turret vertical turning composite machine tool, comprising a machine tool base (1) and a machine tool column (11) vertically disposed on the upper end of the machine tool base (1), wherein two symmetrically distributed power turrets (12) are movably disposed on one side of the machine tool column (11), and a turret movement drive mechanism (2) is provided between the power turrets (12) and the machine tool column (11) to drive the power turrets (12) to move vertically up and down and horizontally along the machine tool column (11), characterized in that, The power turret (12) has at least one of turning assembly, milling assembly and drilling and milling assembly. An electric spindle (3) is provided on the upper end of the machine tool base (1) on one side of the machine tool column (11) and between the two power turrets (12). The upper end of the electric spindle (3) has a chuck assembly (4) for clamping the workpiece (13) and the electric spindle (3) has a brake assembly (5). A spindle-type center assembly (7) corresponding to the chuck assembly (4) is provided on one side of the machine tool column (11) through a tailstock vertical lifting structure (6).

2. The dual-turret vertical turning composite machine tool according to claim 1, characterized in that, The chuck assembly (4) includes a pull-back chuck (41) disposed on the upper end of the electric spindle (3), and a rotary cylinder (42) is provided at the lower end of the electric spindle (3). The pull-back chuck (41) is connected to the rotary cylinder (42) through a pull rod (43) passing through the electric spindle (3).

3. A dual-turret vertical turning composite machine tool according to claim 2, characterized in that, The brake assembly (5) includes a brake bracket (51) whose upper end is connected to the outside of the electric spindle (3), the lower end of the brake bracket (51) is connected to the spindle housing (52) located on the outer side of the electric spindle (3), and the lower end of the brake bracket (51) is provided with a brake pad (53) that mates with the lower end face of the electric spindle (3).

4. A dual-turret vertical turning composite machine tool according to claim 1, 2, or 3, characterized in that, The power turret (12) has several installation stations (14) on its outer circumference, and each installation station (14) is provided with a turning component, a milling component, a drilling and milling component and a measuring component arranged in sequence.

5. A dual-turret vertical turning composite machine tool according to claim 4, characterized in that, The tailstock vertical lifting structure (6) includes several tailstock lifting rails (61) vertically arranged on one side of the middle part of the machine tool column (11). The tailstock lifting rails (61) are slidably provided with sliders (63) connected to the tailstock slide (62). The tailstock slide (62) is provided with a tailstock screw nut (64) inside. The tailstock screw nut (64) is provided with a tailstock lifting screw (65) threadedly connected to the tailstock screw nut (64). The upper end of the tailstock lifting screw (65) is connected to the tailstock lifting motor (66) provided on the upper end of the machine tool column (11).

6. A dual-turret vertical turning composite machine tool according to claim 5, characterized in that, The spindle-type center assembly (7) includes a tailstock box (71) located outside the tailstock slide (62), and a spindle-type center body (72) is provided inside the tailstock box (71). The lower end of the spindle-type center body (72) has a vertically downward-facing center part (73) corresponding to the workpiece (13).

7. A dual-turret vertical turning composite machine tool according to claim 1, characterized in that, The turret movement drive mechanism (2) includes a vertical drive structure (21) that can drive the power turret (12) to move vertically up and down along the machine tool column (11) and a horizontal drive structure (22) that can drive the power turret (12) to move horizontally along the machine tool column (11).

8. A dual-turret vertical turning composite machine tool according to claim 7, characterized in that, The vertical drive structure (21) includes vertical drive grooves (23) at both ends of one side of the machine tool column (11). A vertical screw nut drive assembly (24) is provided in the vertical drive groove (23). Vertical rails (25) are provided on both sides of the vertical drive groove (23). A vertical slide (26) connected to the vertical screw nut drive assembly (24) is provided on the outside of the vertical drive groove (23). Several vertical sliders (27) connected to the vertical rails (25) are provided on the side of the vertical slide (26) near the machine tool column (11).

9. A dual-turret vertical turning composite machine tool according to claim 8, characterized in that, The horizontal drive structure (22) includes a horizontal drive groove (28) located on the side of the vertical slide (26) away from the machine tool column (11). A horizontal lead screw and nut drive assembly (29) is provided in the horizontal drive groove (28). Horizontal linear rails (30) are provided on both sides of the horizontal drive groove (28). The power turret (12) is located outside the horizontal drive groove (28) and connected to the horizontal lead screw and nut drive assembly (29). The power turret (12) is provided with several horizontal sliders (121) connected to the horizontal linear rails (30) on the side of the power turret (12) near the vertical slide (26).

10. A dual-turret vertical turning composite machine tool according to claim 1, characterized in that, The machine tool base (1) is provided with a chip removal part (15) on the side away from the machine tool column (11). The chip removal part (15) is provided with chip removal grooves (16) at both ends. The chip removal grooves (16) correspond one-to-one with the power turret (12). The chuck assembly (4) is arranged between the two chip removal grooves (16). The lower end of the machine tool base (1) is provided with chip removal mechanisms (17) corresponding to the chip removal grooves (16).

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