Three-station rotary numerical control machine tool automatic attachment magazine

Abstract

A three-station rotary numerical control machine tool automatic accessory library belongs to the technical field of numerical control machine tools, including a support and a rotating shaft installed on the support, the rotating shaft is vertically arranged, a one-side opening shield is fixed outside the support, a library door is rotatably arranged on the rotating shaft, and the library door is used for plugging the shield; a rigid disc tray, a right-angle accessory head tray and an extended right-angle accessory head tray are sequentially and rotatably connected from top to bottom on the rotating shaft, one telescopic oil cylinder is connected to each of the rigid disc tray, the right-angle accessory head tray and the extended right-angle accessory head tray, one side of the extended right-angle accessory head tray is connected with the library door, the two-point dispersion stress can be achieved, the bearing pressure of the tray and the rotating shaft can be greatly reduced, the linkage of the library door and the rotating shaft can be used to ensure the rotation synchronization of the tray, the deviation during the rotation of the large accessory head can be reduced, the tray can be reinforced in rigidity relying on the library door to resist deformation, and the storage demand of the larger weight accessory head can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to an automatic accessory library for a three-station rotary CNC machine tool. Background Technology

[0002] As modern CNC machine tools continue to develop towards intelligence and precision, machine tool accessory libraries, as an extension and expansion of CNC machine tools, can utilize multiple accessory heads to meet the multi-process machining needs of complex workpieces and satisfy the demand for high-efficiency operation of large CNC machine tools.

[0003] To shorten the time for changing attachment heads on CNC machine tools and improve overall processing efficiency, a three-station head storage mechanism (such as publication number CN218800471U) has emerged. This mechanism includes upper, middle, and lower support layers, each connected to a corresponding cylinder. The upper, middle, and lower layers are used for storing attachment heads. By pushing the corresponding support to rotate 90° around its axis, the attachment head can be moved to the replacement position, thus facilitating the replacement of attachment heads without manual handling and shortening the time for changing attachment heads.

[0004] The existing three-station head magazine mechanism is an open support structure. The attachment head is easily affected by dust and debris. Moreover, the support is only connected to the rotating shaft for support, which has limited support capacity. It is usually suitable for small and medium-sized attachment heads. For large attachment heads (such as extended right-angle attachment milling heads), the support is easily deformed by stress. In addition, the rotation and positioning of the support is achieved by controlling the extension and retraction length of the cylinder, which has limited positioning accuracy. Utility Model Content

[0005] To address the technical problems in the existing three-station head storage mechanism described above, which is an open support structure, making the accessory head highly susceptible to dust and debris, and with the support only connected to the rotating shaft, resulting in limited support capacity, and the support easily deforming under stress for large accessory heads, this utility model provides a three-station rotary CNC machine tool automatic accessory storage.

[0006] The technical solution of this utility model is as follows: This utility model provides a three-station rotary CNC machine tool automatic accessory storage unit, including a bracket and a rotating shaft mounted on the bracket. The rotating shaft is vertically arranged, and a protective cover with an opening on one side is fixedly installed on the outside of the bracket. A storage door is rotatably mounted on the rotating shaft, and the storage door is used to seal the protective cover. A rigid disc tray, a right-angle accessory head tray, and an extended right-angle accessory head tray are rotatably connected from top to bottom on the rotating shaft. Each of the rigid disc tray, right-angle accessory head tray, and extended right-angle accessory head tray is connected to a telescopic hydraulic cylinder. One side of the extended right-angle accessory head tray is fixedly connected to the storage door. The cooperation between the protective cover and the storage door forms a closed space, solving the problem of dust and debris entering easily. At the same time, a special tray is set to adapt to different types of accessory heads. With the drive of the telescopic hydraulic cylinder, it replaces manual handling, further shortening the replacement time. Moreover, the extended right-angle accessory head tray is fixedly connected to the storage door to achieve multi-point support, improving the support stability of the extended right-angle accessory head tray, which is suitable for storing large accessory heads.

[0007] Preferably, the rigid disc tray, the right-angle accessory head tray, and the extended right-angle accessory head tray all have positioning holes at the center of their bottoms. Several first bolt holes are provided around the positioning holes. A buffer support mechanism is installed at the positioning holes. The positioning holes provide a precise installation reference for the buffer support mechanism, ensuring that the mechanism is aligned with the center of the tray. The buffer support mechanism can distribute the weight pressure of the accessory head and prevent the accessory head from colliding and being damaged by the corresponding tray.

[0008] Preferably, the buffer support mechanism includes a hollow fixed seat, which is fixedly connected to the first bolt hole by a fixing bolt. A sliding shaft is slidably provided inside the fixed seat, and a second spring is sleeved on the sliding shaft. The lower end of the sliding shaft extends downward out of the fixed seat and is fixedly connected to a limit plate. The upper end of the sliding shaft is threadedly connected to a support head. The fixing bolt connection facilitates the disassembly and maintenance of the buffer support mechanism. The cooperation between the sliding shaft and the second spring can achieve elastic support, absorb impact when the accessory head is placed or the tray rotates, and reduce vibration damage to the accessory head and the tray.

[0009] Preferably, both the right-angle accessory head tray and the extended right-angle accessory head tray have three sides. Limiting side frames are fixedly provided on two opposite sides of the right-angle accessory head tray and the extended right-angle accessory head tray. The limiting side frames can laterally limit the accessory head to prevent the accessory head from shifting during tray rotation or storage, and avoid uneven force and positioning deviation caused by shifting.

[0010] Preferably, the front facade of the support has three horizontally arranged positioning bolts threaded onto the cover. The three positioning bolts are divided into three layers. Three through holes are vertically opened along the upper edge of the door. The positioning bolts pass through the through holes and contact the corresponding rigid tray, right-angle accessory head tray, and extended right-angle accessory head tray. The layered positioning bolts can accurately correspond to each layer of trays. The tray positioning is achieved through the rigid contact of the bolts, which is not affected by air pressure fluctuations and greatly improves the positioning accuracy after the tray rotates. The threaded connection method makes it easy to adjust the extension length of the positioning bolts and calibrate the positioning position according to actual use needs.

[0011] Preferably, each positioning bolt has a corresponding buffer on one side. The buffer is fixedly installed on the cover. The lateral extension length of the buffer is longer than that of the positioning bolt. The buffer passes through the through hole and contacts the corresponding rigid disc tray, right-angle accessory head tray and extended right-angle accessory head tray. The extension length of the buffer is longer than that of the positioning bolt, so it can contact the tray before the tray rotates into place, offset the inertial impact force, and avoid positioning displacement and structural damage caused by hard collision between the tray and the positioning bolt.

[0012] Preferably, the buffer includes a support base and an abutment. The support base is fixedly mounted on the cover by adjusting bolts. A first slide rod and a second slide rod are fixedly provided on the abutment. Both the first slide rod and the second slide rod pass through the support base and the cover. A first spring is sleeved on the first slide rod. The first spring is located between the support base and the abutment. The adjusting bolts facilitate the adjustment of the position of the support base, thereby calibrating the contact position between the buffer and the tray to adapt to different working conditions. The double slide rod structure ensures stable movement of the abutment and avoids displacement caused by unilateral force.

[0013] Preferably, both the support base and the abutment are fixedly provided with limiting posts, and the end of the first spring is inserted into the limiting post. The limiting post can accurately position the first spring, prevent the spring from shifting or falling off during compression or rebound, ensure that the buffer always maintains stable buffering performance, avoid buffering failure caused by spring shift, and indirectly ensure the positioning accuracy of the tray.

[0014] Preferably, a bellows cover is provided between the warehouse door and the protective cover. The bellows cover shields the rotating shaft and fills the gap between the warehouse door and the protective cover, preventing dust and debris from entering the interior of the protective cover and contaminating the rotating shaft. At the same time, it prevents the rotating shaft transmission structure from being affected by impurities and becoming stuck.

[0015] Preferably, a detection switch is fixedly installed on the rigid disc tray, the right-angle accessory head tray, and the extended right-angle accessory head tray. The detection switch can detect in real time whether the accessory head is placed in place and whether the tray has rotated to the designated replacement position, thus providing accurate position feedback.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are: 1. A dedicated pallet is designed to accommodate different types of accessory heads. Driven by a telescopic hydraulic cylinder, the pallet forms a closed space through the cooperation of the cover and the door, providing dust protection. The right-angle accessory head pallet is extended and connected to the shaft and door. A two-way support structure for the shaft and door is constructed to address the heavy characteristics of large accessory heads. This structure can distribute the force at two points, significantly reducing the load on the pallet and shaft. The linkage between the door and shaft ensures the synchronous rotation of the pallet, reducing the offset when large accessory heads rotate. Furthermore, the rigidity of the door enhances the pallet's resistance to deformation, adapting to the storage needs of heavier accessory heads.

[0017] 2. The positioning bolts arranged in upper and lower layers, together with the buffer on one side, can first contact the pallet to offset the inertial impact when the pallet rotates into place, avoiding displacement or damage caused by hard collision. Then the positioning bolts accurately abut against the pallet to achieve rigid positioning. This not only ensures the positioning accuracy of each pallet after rotation, but also protects the pallet and bolt structure through the buffering effect. At the same time, the threaded connection of the positioning bolts can also flexibly adjust the extension length to adapt to the positioning requirements under different working conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram (open state) of the automatic accessory library of a three-station rotary CNC machine tool according to one or more embodiments of the present invention. Figure 2 This is a three-dimensional structural diagram (closed state) of the automatic accessory library of a three-station rotary CNC machine tool according to one or more embodiments of the present invention. Figure 3 This is a top view of the automatic accessory library of a three-station rotary CNC machine tool according to one or more embodiments of the present invention. Figure 4 This is a cross-sectional schematic diagram of the buffer support mechanism according to one or more embodiments of the present invention; Figure 5 This is a schematic diagram of the structure of the buffer according to one or more embodiments of the present invention; The components represented by the various reference numerals in the diagram are: 1. Bracket; 2. Bellows cover; 3. Rotary shaft support; 4. Rotary shaft; 5. Hydraulic cylinder piston; 6. Telescopic hydraulic cylinder; 7. Right-angle accessory head tray; 8. Rigid disc tray; 9. Cover; 10. Extended right-angle accessory head tray; 11. Detection switch; 12. Warehouse door; 13. Buffer; 14. Positioning bolt; 15. Positioning hole; 16. First bolt hole; 17. Second bolt hole; 18. Limiting side frame; 19. Reinforcing rib; 20. Adjusting bolt; 21. Support seat; 22. Abutment joint; 23. First spring; 24. Limiting post; 25. First sliding rod; 26. Second sliding rod; 27. Fixing bolt; 28. Fixing seat; 29. ​​Second spring; 30. Sliding shaft; 31. Support head; 32. Limiting plate; 33. Through hole. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of this utility model, such as Figures 1-5As shown, a three-station rotary CNC machine tool automatic accessory library is proposed, including: a bracket 1, a rotating shaft 4, a telescopic cylinder 6, a right-angle accessory head tray 7, a rigid disc tray 8, a protective cover 9, an extended right-angle accessory head tray 10, a door 12, and positioning bolts 14. The rotating shaft 4 is vertically arranged, and its upper and lower ends are fixedly mounted on one side of the bracket 1 via rotating shaft supports 3. The rotating shaft 4 and the rotating shaft supports 3 are fixedly connected. The bracket 1 is used to fix the machine tool to the front surface of the column of the gantry CNC machine tool. The protective cover 9 is also fixedly mounted to the front surface of the column of the gantry CNC machine tool and covers the machine tool. Covering the outside of the support 1, the cover 9 has an opening on one side for the tray to extend. The door 12 is fixedly connected to the shaft cylinder, which is rotatably mounted on the rotating shaft 4, thus allowing the door 12 to be rotatably connected to the rotating shaft 4. The door 12 is located on the front side of the support 1. After the door 12 is rotated 90° to open, it is close to the front side of the support 1. The rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10 are all fixedly connected to the shaft cylinder, and the rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10 are rotatably mounted on the rotating shaft 4 in a top-to-bottom direction. Three cylinders 6 are arranged horizontally and vertically in layers. The telescopic cylinders 6 have a large rated driving load, enabling heavy-duty accessory head replacement work. Each of the three telescopic cylinders 6 corresponds to a rigid disc tray 8, a right-angle accessory head tray 7, and an extended right-angle accessory head tray 10. One end of the telescopic cylinder 6 is hinged to a bracket 1, and the other end (i.e., the telescopic end of the cylinder piston 5) is hinged to the corresponding tray. Thus, the telescopic cylinder 6 pushes the corresponding tray to rotate around an axis. One side of the extended right-angle accessory head tray 10 is fixedly connected to the door 12 by welding to achieve… Multiple support points enhance the support stability of the extended right-angle accessory head tray 10, making it suitable for storing large accessory heads. Positioning bolts 14 are fixedly installed on the protective cover 9 on the front facade of the bracket 1. There are three positioning bolts 14 arranged in an upper and lower layer. The positioning bolts 14 correspond one-to-one with the rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10, so as to rigidly position the tray rotation and ensure positioning accuracy. Three through holes 33 are vertically opened on the upper edge of the storage door 12 so that the positioning bolts 14 can pass through the storage door 12 and contact the corresponding tray, thereby realizing the positioning of the tray.

[0022] Specifically, the rigid disc tray 8 is located above the right-angle accessory head tray 7, and the right-angle accessory head tray 7 is located above the extended right-angle accessory head tray 10. Since the extended right-angle accessory head tray 10 needs to be fixedly connected to the door 12, placing the extended right-angle accessory head tray 10 at the bottom can effectively avoid obstructing the rigid disc tray 8 and the right-angle accessory head tray 7.

[0023] The heights of the rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10 increase sequentially to accommodate accessory heads of different sizes. Both the right-angle accessory head tray 7 and the extended right-angle accessory head tray 10 have three sides. Limiting side frames 18 are fixedly provided on the opposite sides of the right-angle accessory head tray 7 and the extended right-angle accessory head tray 10. Several second bolt holes 17 are provided on the limiting side frames 18 for the fixed installation of limiting blocks. The limiting blocks are used to limit the right-angle accessory head and the extended right-angle accessory head. The extended right-angle accessory head tray 10 is also fixedly connected to the adjacent side by reinforcing ribs 19 to improve the overall strength of the extended right-angle accessory head tray 10.

[0024] The rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10 all have positioning holes 15 at the center of their bottoms. Several first bolt holes 16 are provided around the positioning holes 15 for the installation of the buffer support mechanism. The buffer support mechanism supports and limits the bottom of the accessory head on the tray and buffers it to prevent the accessory head from colliding and being damaged with the corresponding tray during placement.

[0025] like Figure 4 As shown, the buffer support mechanism includes a fixing bolt 27, a fixing seat 28, a second spring 29, a sliding shaft 30, a support head 31, and a limiting plate 32. The fixing seat 28 is a hollow structure and is fixedly connected to the first bolt hole 16 by the fixing bolt 27, thereby achieving a fixed connection between the fixing seat 28 and the bottom of the corresponding tray. The second spring 29 is placed inside the fixing seat 28. The sliding shaft 30 is a T-shaped shaft and is slidably disposed inside the fixing seat 28. The second spring 29 is sleeved on the sliding shaft 30. The lower end of the sliding shaft 30 extends downward out of the fixing seat 28 and is fixedly connected to the limiting plate 32 by screws to prevent the sliding shaft 30 from being pulled upward as a whole. The upper end of the sliding shaft 30 is threadedly connected to the support head 31, which is used to contact the bottom center hole of the accessory head to play a role in buffering and positioning.

[0026] In this embodiment, an accordion cover 2 is also provided between the door 12 and the cover 9 to shield and protect the rotating shaft 4, so as to prevent debris such as flying dust and splashing water from entering the rotating shaft 4 and the cover 9.

[0027] The positioning bolt 14 is connected to the protective cover 9 by bolt connection. The protective cover 9 has a threaded hole at the corresponding position to realize the installation and length adjustment of the positioning bolt 14. Each positioning bolt 14 has a buffer 13 on one side. The buffer 13 is fixedly installed on the protective cover 9. The lateral extension length of the buffer 13 is longer than that of the positioning bolt 14 to buffer the pallet and prevent the pallet from directly colliding with the corresponding positioning bolt 14 and being damaged when the warehouse door 12 is opened.

[0028] A detection switch 11 is fixedly installed on the rigid disc tray 8, the right-angle accessory head tray 7, and the extended right-angle accessory head tray 10 to detect the position of the tray and the accessory head, determine whether the tray is open and whether the accessory head is placed in place, and thus realize the automatic replacement of the accessory milling head.

[0029] like Figure 5 As shown, the buffer 13 includes adjusting bolts 20, a support base 21, an abutment 22, a first spring 23, a first sliding rod 25, and a second sliding rod 26. Two adjusting bolts 20 are provided and arranged laterally. The two adjusting bolts 20 are connected to the cover 9 by a threaded connection. Specifically, the cover 9 has holes with nuts welded and fixed at the holes. The adjusting bolts 20 are threadedly connected to the nuts, thereby changing the extension length of the adjusting bolts 20. The support base 21 is connected to the adjusting bolts 20 by a threaded connection, allowing the position of the support base 21 outside the cover 9, i.e., the distance between the support base 21 and the cover 9, to be changed by adjusting the bolts 20. A first sliding rod 25 and a second sliding rod 26 are fixedly provided on the abutment joint 22. The first sliding rod 25 and the second sliding rod 26 pass through the support base 21 and the protective cover 9 in sequence and are slidably connected with the support base 21 and the protective cover 9 to play a guiding role. The first spring 23 is sleeved on the first sliding rod 25 and is located between the support base 21 and the abutment joint 22. The support base 21 and the abutment joint 22 are both fixedly provided with limiting posts 24. The end of the first spring 23 is inserted into the limiting post 24 to limit the first spring 23. The support base 21 can change the initial compression of the first spring 23 by adjusting its position, thereby changing the initial buffering force of the buffer 13.

[0030] In this embodiment, the abutment 22 is a plate-shaped structure. In practical applications, a rubber head can also be fixed on the abutment 22 to reduce the collision damage between the abutment 22 and the corresponding tray.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic accessory library for a three-station rotary CNC machine tool, comprising: The bracket (1) and the rotating shaft (4) installed on the bracket (1) are arranged vertically. The bracket (1) is characterized by having a protective cover (9) with an opening on one side fixed on the outside of the bracket (1). The rotating shaft (4) is rotatably provided with a storage door (12) for sealing the protective cover (9). The rotating shaft (4) is connected in sequence from top to bottom to a rigid disc tray (8), a right-angle accessory head tray (7) and an extended right-angle accessory head tray (10). The rigid disc tray (8), the right-angle accessory head tray (7) and the extended right-angle accessory head tray (10) are each connected to a telescopic cylinder (6). One side of the extended right-angle accessory head tray (10) is fixedly connected to the storage door (12).

2. The automatic accessory library for a three-station rotary CNC machine tool according to claim 1, characterized in that, The rigid disc tray (8), the right-angle accessory head tray (7) and the extended right-angle accessory head tray (10) are all provided with positioning holes (15) at the center of their bottoms. Several first bolt holes (16) are provided around the positioning holes (15). A buffer support mechanism is installed at the positioning holes (15).

3. The automatic accessory library for a three-station rotary CNC machine tool according to claim 2, characterized in that, The buffer support mechanism includes a hollow fixed seat (28), which is fixedly connected to the first bolt hole (16) by a fixing bolt (27). A sliding shaft (30) is slidably provided inside the fixed seat (28), and a second spring (29) is sleeved on the sliding shaft (30). The lower end of the sliding shaft (30) extends downward out of the fixed seat (28) and is fixedly connected to a limit plate (32). The upper end of the sliding shaft (30) is threadedly connected to a support head (31).

4. The automatic accessory library for a three-station rotary CNC machine tool according to claim 1, characterized in that, Both the right-angle accessory head tray (7) and the extended right-angle accessory head tray (10) have three sides, and a limiting side bracket (18) is fixedly provided on two opposite sides of the right-angle accessory head tray (7) and the extended right-angle accessory head tray (10).

5. The automatic accessory library for a three-station rotary CNC machine tool according to claim 1, characterized in that, The front cover (9) of the bracket (1) has three horizontally arranged positioning bolts (14) threaded on it. The three positioning bolts (14) are divided into three layers. The upper edge of the door (12) has three through holes (33). The positioning bolts (14) pass through the through holes (33) and contact the corresponding rigid disc tray (8), right-angle accessory head tray (7) and extended right-angle accessory head tray (10).

6. The automatic accessory library for a three-station rotary CNC machine tool according to claim 5, characterized in that, Each positioning bolt (14) has a corresponding buffer (13) on one side. The buffer (13) is fixedly installed on the cover (9). The lateral extension length of the buffer (13) is longer than that of the positioning bolt (14). The buffer (13) passes through the through hole (33) and contacts the corresponding rigid disc tray (8), right-angle accessory head tray (7) and extended right-angle accessory head tray (10).

7. The automatic accessory library for a three-station rotary CNC machine tool according to claim 6, characterized in that, The buffer (13) includes a support base (21) and an abutment (22). The support base (21) is fixedly installed on the cover (9) by adjusting bolts (20). A first slide rod (25) and a second slide rod (26) are fixedly provided on the abutment (22). The first slide rod (25) and the second slide rod (26) both pass through the support base (21) and the cover (9). A first spring (23) is sleeved on the first slide rod (25). The first spring (23) is located between the support base (21) and the abutment (22).

8. The automatic accessory library for a three-station rotary CNC machine tool according to claim 7, characterized in that, Both the support base (21) and the abutment (22) are fixedly provided with limiting posts (24), and the end of the first spring (23) is inserted into the limiting post (24).

9. The automatic accessory library for a three-station rotary CNC machine tool according to claim 1, characterized in that, A accordion cover (2) is provided between the door (12) and the cover (9), which covers the rotating shaft (4).

10. The automatic accessory library for a three-station rotary CNC machine tool according to claim 1, characterized in that, A detection switch (11) is fixedly installed on the rigid disc tray (8), the right-angle accessory head tray (7), and the extended right-angle accessory head tray (10).

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