Device for long-distance machine tool tray exchange

Abstract

The utility model provides a device for long-distance machine tool tray exchange, which comprises a mother tray, a middle station and a son tray, a first conveying mechanism, a lifting oil cylinder and a zero point positioning system are arranged on the mother tray, the zero point positioning system is arranged in the middle of the first conveying mechanism, and the lifting oil cylinder is arranged in the middle of the zero point positioning system; the middle station comprises a supporting base, a second conveying mechanism is arranged on the supporting base, a traction mechanism is arranged in the middle of the second conveying mechanism, the second conveying mechanism is in butt joint with the first conveying mechanism, and the traction mechanism is detachably connected with the sub-disc. The traction mechanism is used for pulling the sub-trays to move from the second conveying mechanism to the first conveying mechanism or move from the first conveying mechanism to the second conveying mechanism; and the son disc is positioned and locked with the mother disc through a zero point positioning system. The device solves the problems of deformation and flutter caused by insufficient overhanging rigidity of a common transfer gear shaper, is high in positioning precision and automation degree, can improve the exchange efficiency of machine tool trays, and saves manpower and material resources.

Description

Technical Field

[0001] The utility model relates to the field of automated logistics of industrial automation equipment, in particular to a device for exchanging long-distance machine tool pallets. Background Art

[0002] With the continuous development of my country's industry, product manufacturing continues to move towards faster, more precise, and more intelligent processes. High-precision machine tools, as the backbone of industry, play a crucial role in national defense, military, and industrial production. Due to the limited availability of high-precision machine tools, improving machine tool utilization and reducing downtime are crucial. Machine tools require fixtures for positioning and clamping during part processing. Clamping and positioning on the machine requires downtime, necessitating offline pre-clamping and automatic transfer of pre-clamped pallets to the machine. This requires automated pallet exchange for the machine tool.

[0003] To solve this problem, some machine tools are equipped with pallet exchange modules. However, this not only increases the cost of the equipment, but is also too rigid, can only be used by one machine tool, and greatly increases the area occupied by the machine tool. If AGV-type mobile logistics is used for pallet exchange, the pallet needs to be transported from the outside of the machine tool to the inside of the machine tool. For turning and milling machine tools, if the worktable is too far from the machine tool door, the pallet support will be too long to cause insufficient rigidity, resulting in deformation and vibration, which will reduce the transportation accuracy and make it impossible to complete the final positioning of the pallet on the machine tool, resulting in pallet exchange failure. Therefore, for long-distance machine tools, pallet exchange cannot achieve automated loading and unloading, or use truss robots for replacement, but this method is also too rigid and too costly to adapt to the highly automated AGV automatic material change. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a device for long-distance machine tool pallet exchange, so as to realize automatic and rapid pallet replacement over a long distance on the machine tool.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A device for long-distance machine tool pallet exchange, comprising a master tray, an intermediate station and a sub-tray, characterized in that the master tray is used to be mounted on a machine tool workbench, the master tray is provided with a first conveying mechanism, a lifting cylinder and a zero-point positioning system, the zero-point positioning system is arranged in the middle of the first conveying mechanism, and the lifting cylinder is arranged in the middle of the zero-point positioning system; the intermediate station is arranged between the master tray and the machine tool door, the intermediate station includes a support seat, a second conveying mechanism is provided on the support seat, a traction mechanism is provided in the middle of the second conveying mechanism, the second conveying mechanism and the first conveying mechanism are docked to form a travel track of the sub-tray, the traction mechanism and the sub-tray are detachably connected, the traction mechanism is used to pull the sub-tray from the second conveying mechanism to the first conveying mechanism or move out of the first conveying mechanism to the second conveying mechanism; a positioning pin cooperating with the zero-point positioning system is provided under the sub-tray, and the sub-tray is positioned and locked with the master tray through the zero-point positioning system.

[0006] The principle of the present invention is that an operator or other equipment places the sub-disc on the intermediate station and connects the sub-disc and the traction mechanism, and the sub-disc is pulled from the second conveying mechanism of the intermediate station to the first conveying mechanism above the mother disc through the traction mechanism, and is further pulled to a preset position above the mother disc. At this time, the lifting cylinder supports the bottom of the sub-disc, and then the lifting cylinder descends, and the traction mechanism and the sub-disc are separated and reset. The sub-disc falls with the descending of the lifting cylinder, and the positioning pin below it is combined with the zero-point positioning system on the mother disc, and then the zero-point positioning system is inflated and locked, completing the positioning of the sub-disc on the mother disc; on the contrary, when the sub-disc needs to be separated, the zero-point positioning system unlocks the connection with the sub-disc positioning pin, the lifting cylinder lifts the sub-disc, the traction mechanism is linked to the sub-disc, and the sub-disc is pulled toward the second conveying mechanism, so that the sub-disc gradually separates from the first conveying mechanism on the mother disc, until the sub-disc is completely returned to the second conveying mechanism, completing the separation of the sub-disc and the mother disc.

[0007] Preferably, the first conveying mechanism includes two parallel first conveying rails and two first limit baffles respectively arranged on the outer sides of the corresponding first conveying rails. The two first limit baffles constitute a first channel for the sub-disc to pass over the mother disk. The width of the first channel is 2 mm larger than the width of the corresponding part of the sub-disc.

[0008] Preferably, the second conveying mechanism includes two parallel second conveying rails and two second limit baffles respectively arranged on the outside of the corresponding second conveying rails. The two second limit baffles constitute a second channel for the sub-disk to pass above the intermediate station. The width of the second channel is 4 mm larger than the width of the corresponding part of the sub-disk.

[0009] Preferably, the second limit baffle is slidably connected to the intermediate station via two parallel micro guide rails, the micro guide rails are perpendicular to the moving direction of the sub-disk, and a driving cylinder is provided on one side of the second limit baffle.

[0010] Preferably, the first conveying guide rail and the second conveying guide rail are both composed of a number of screw-type universal balls arranged at equal intervals.

[0011] Preferably, a positioning block is further provided on the mother disk, and the positioning block is located on the side of the zero-point positioning system away from the intermediate station, and the positioning block is used to limit the front end of the daughter disk.

[0012] Preferably, the traction mechanism includes a mounting frame, a driving wheel, a driven wheel, a chain, a driving motor and a traction pin. The mounting frame is horizontally arranged in the middle of the intermediate station, and the driving wheel and the driven wheel are arranged on the upper surface of the mounting frame front and back along the conveying direction of the sub-disk, and the axis center lines of the driving wheel and the driven wheel are vertical. The chain is sleeved on the driving wheel and the driven wheel, and the driving motor is mounted on the lower surface of the mounting frame and its output shaft is coaxially connected to the driving wheel. The traction pin is mounted on the upper side of the chain; an L-shaped opening groove is provided at the bottom of the rear end of the sub-disk, and the opening of the opening groove is located on the rear end surface of the sub-disk; the traction pin can be stuck in the opening groove or disengaged from the opening groove under the drive of the driving motor.

[0013] Preferably, the traction mechanism further comprises a tensioning wheel, which is arranged between the driving wheel and the driven wheel, and the position of the tensioning wheel is adjustable in a direction perpendicular to the moving direction of the sub-disk.

[0014] Preferably, the traction mechanism further includes a slide rail, a slider and a telescopic oil cylinder. The slide rail is installed on the intermediate station along the travel direction of the sub-disk. The mounting frame is slidably connected to the slide rail through the slider. The telescopic oil cylinder is connected to the slider.

[0015] Preferably, a positioning sleeve is provided in the middle of the sub-disk, and a joint matching the positioning sleeve is provided on the top of the lifting cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The device for long-distance machine tool pallet exchange provided by the utility model can solve the problem of insufficient rigidity caused by excessive overhang of the gear shaping machine during transfer due to the distance between the machine tool door and the machine tool worktable, thereby causing gear shaping deformation and chatter, thereby realizing the automation of long-distance machine tool pallet exchange;

[0018] 2. The zero-point positioning system cooperates with the hole pin positioning and the oil cylinder drop, with high positioning accuracy and high degree of automation, which can improve efficiency and save manpower and material resources;

[0019] 3. The device for long-distance machine tool pallet exchange provided by the utility model is installed inside the machine tool and does not increase the machine tool footprint. In addition, the modification content is simple and easy to implement. Combined with AGV automatic loading and unloading, the machine tool pallet exchange is more flexible and the maximum utilization of the equipment is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of a long-distance machine tool pallet exchange device according to an embodiment;

[0021] Figure 2 for Figure 1 A magnified view of point A;

[0022] Figure 3 A top view of a long-distance machine tool pallet exchange device according to an embodiment;

[0023] Figure 4 for Figure 3 AA direction cross-sectional view;

[0024] Figure 5 This is a view of the assembly of the master disc and the intermediate station of the embodiment;

[0025] Figure 6 This is a bottom view of the sub-dish of the embodiment.

[0026] In the figure: 1. mother disc; 1a. first conveying mechanism; 1a1. first conveying guide rail; 1a2. first limit baffle; 1b. lifting cylinder; 1c. zero-point positioning system; 1d. joint; 2. intermediate station; 2a. support seat; 2b. second conveying mechanism; 2b1. second conveying guide rail; 2b2. second limit baffle; 2b3. micro guide rail; 2b4. driving cylinder; 2c. traction mechanism; 2c1. mounting frame; 2c2. driving wheel; 2c3. driven wheel; 2c4. chain; 2c5. driving motor; 2c6. traction pin; 2c7. tensioning wheel; 2c8. slide rail; 2c9. slider; 2c10. telescopic cylinder; 3. sub-disk; 3a. positioning pin; 3b. opening slot; 3c. positioning sleeve. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that a person skilled in the art may make various variations and improvements without departing from the scope of the present invention. Such variations and improvements are all within the scope of protection of the present invention.

[0028] like Figure 1-6As shown, this embodiment provides a device for long-distance machine tool pallet exchange, including a master plate 1, an intermediate station 2 and a sub-plate 3. The master plate 1 is used to be installed on the machine tool workbench. The master plate 1 is provided with a first conveying mechanism 1a, a lifting cylinder 1b and a zero-point positioning system 1c. The zero-point positioning system 1c is arranged in the middle of the first conveying mechanism 1a, and the lifting cylinder 1b is arranged in the middle of the zero-point positioning system 1c; the intermediate station 2 is arranged between the master plate 1 and the machine tool door, and the intermediate station 2 includes a support base 2a, and a second conveying mechanism 2b is provided on the support base 2a. A traction mechanism is provided in the middle of the second conveying mechanism 2b. The second conveying mechanism 2b and the first conveying mechanism 1a are connected to form the travel track of the sub-disc 3. The traction mechanism 2c and the sub-disc 3 are detachably connected. The traction mechanism 2c is used to pull the sub-disc 3 from the second conveying mechanism 2b to the first conveying mechanism 1a, or to move it from the first conveying mechanism 1a to the second conveying mechanism 2b. A positioning pin 3a is provided below the sub-disc 3, which cooperates with the zero-point positioning system 1c. The sub-disc 3 is positioned and locked to the mother disc 1 through the zero-point positioning system 1c. A positioning sleeve 3c is provided in the middle of the sub-disc 3, and a joint 1d is provided on the top of the lifting cylinder 1b to match the positioning sleeve 3c. The matching of the positioning sleeve 3c and the joint 1d enables the lifting cylinder 1b to better control the lifting of the sub-disc 3, improve lifting accuracy, and avoid deviation.

[0029] Since the accuracy of the sub-tray 3 delivered by the AGV or other logistics conveying system is generally within ±5mm, in order to better achieve the positioning of the sub-tray 3, it is necessary to gradually position the sub-tray 3 and place it on the workbench. Therefore, a two-stage progressive conveying method is set up, which is implemented by the cooperation of the first conveying mechanism 1a and the second conveying mechanism 2b. The corresponding structures are described in detail below:

[0030] Specifically, the second conveying mechanism 2b includes two parallel second conveying rails 2b1 and two second limit baffles 2b2 respectively arranged on the outside of the corresponding second conveying rails 2b1. The two second limit baffles 2b2 form a second channel for the sub-disc 3 to pass above the intermediate station 2. The width of the second channel is 4 mm larger than the width of the corresponding part of the sub-disc 3. One of the second limit baffles 2b2 is slidably connected to the intermediate station 2 via two parallel micro guide rails 2b3. The micro guide rails 2b3 are perpendicular to the movement direction of the sub-disc 3. A driving cylinder 2b4 is provided on one side of the second limit baffle 2b2. The position of the second limit baffle 2b2 is adjusted by the action of the driving cylinder 2b4, thereby changing the width of the second channel so that it can better adapt to the sub-disc 3. During implementation, the sub-disc 3 is first transported to the second conveying mechanism 2b on the intermediate station 2 by a logistics conveying system such as an AGV. The width of the second channel is adjusted by driving the oil cylinder 2b4, achieving the initial positioning of the sub-plate 3 and achieving high-precision positioning in the width direction with an accuracy error of ±2mm. The sub-plate 3 is then restrained and pulled on the second conveying mechanism 2b by the traction mechanism 2c.

[0031] The traction mechanism 2c includes a mounting frame 2c1, a driving wheel 2c2, a driven wheel 2c3, a chain 2c4, a driving motor 2c5 and a traction pin 2c6. The mounting frame 2c1 is horizontally arranged in the middle of the intermediate station 2, and the driving wheel 2c2 and the driven wheel 2c3 are arranged on the upper surface of the mounting frame 2c1 front and back along the conveying direction of the sub-disk 3, and the axis center lines of the driving wheel 2c2 and the driven wheel 2c3 are vertical. The chain 2c4 is sleeved on the driving wheel 2c2 and the driven wheel 2c3, the driving motor 2c5 is mounted on the lower surface of the mounting frame 2c1 and its output shaft is coaxially connected to the driving wheel 2c2, and the traction pin 2c6 is mounted on the upper side of the chain 2c4; an L-shaped opening groove 3b is opened at the bottom of the rear end of the sub-disk 3, and the opening of the opening groove 3b is located on the rear end surface of the sub-disk 3; the traction pin 2c6 can be stuck into the opening groove 3b or disengaged from the opening groove 3b under the drive of the driving motor 2c5. The traction mechanism 2c also includes a tensioner 2c7, positioned between the driving pulley 2c2 and the driven pulley 2c3. The tensioner 2c7 is adjustable in a direction perpendicular to the travel direction of the sub-disk 3. The chain 2c4 is adjusted by the tensioner 2c7. The traction mechanism 2c also includes a slide rail 2c8, a slider 2c9, and a telescopic cylinder 2c10. The slide rail 2c8 is mounted on the intermediate station 2 along the travel direction of the sub-disk 3. The mounting frame 2c1 is slidably connected to the slide rail 2c8 via the slider 2c9. The telescopic cylinder 2c10 is connected to the slider 2c9. The telescopic cylinder 2c10 drives the slider 2c9 to move on the slide rail 2c8, thereby adjusting the position of the traction mechanism 2c and facilitating its connection and disconnection from the sub-disk 3.

[0032] The sub-disc 3 is pushed into the first conveying mechanism 1a by the traction mechanism 2c. In this embodiment, the first conveying mechanism 1a includes two parallel first conveying guide rails 1a1 and two first limit baffles 1a2 respectively arranged on the outside of the corresponding first conveying guide rails 1a1. The two first limit baffles 1a2 constitute a first channel for the sub-disc 3 to pass over the mother disc 1. The width of the first channel is 2mm larger than the width of the corresponding part of the sub-disc 3. Through this design, the initial positioning of the sub-disc 3 above the mother disc 1 can be achieved, so that its positioning accuracy in the horizontal direction perpendicular to the direction of travel becomes ±1mm. The first conveying guide rail 1a1 and the second conveying guide rail 2b1 are both composed of a number of screw-type universal balls arranged at equal intervals. Through this design, the sub-disc 3 can be rolled on the track with only a small traction force.

[0033] Example 2:

[0034] The long-distance machine tool pallet exchange device provided in this embodiment has essentially the same structure as that of Example 1, differing in that a positioning block is also provided on the master pallet 1. This block is located on the side of the zero-point positioning system 1c away from the intermediate station 2 and serves to limit the front end of the slave pallet 3. As the slave pallet 3 moves toward the master pallet 1, its front end stops upon contact with the positioning block, completing the positioning of the slave pallet 3 in the direction of travel with near-zero accuracy.

[0035] The working process of this utility model is as follows:

[0036] When installing the sub-disc 3, the AGV or other logistics conveying system places the sub-disc 3 on the second conveying mechanism 2b of the intermediate station 2 and connects the sub-disc 3 to the traction pin 2c6 of the traction mechanism 2c. The sub-disc 3 is then pulled from the second conveying mechanism 2b of the intermediate station 2 to the first conveying mechanism 1a above the mother disk 1 through the traction mechanism 2c, and further pulled to a preset position above the mother disk 1. At this time, the lifting cylinder 1b presses against the bottom of the sub-disc 3, and then the lifting cylinder 1b descends, and the traction pin 2c6 disengages from the opening slot 3b of the sub-disc 3. The traction mechanism 2c is reset, and the sub-disc 3 falls as the lifting cylinder 1b descends. The positioning pin 3a below it engages with the zero-point positioning system 1c on the mother disk 1, and then the zero-point positioning system 1c is inflated and locked, completing the positioning of the sub-disc 3 on the mother disk 1.

[0037] On the contrary, when the sub-disc 3 needs to be detached, the zero-point positioning system 1c unlocks the connection with the positioning pin 3a of the sub-disc 3, the lifting cylinder 1b lifts the sub-disc 3, and the traction pin 2c6 of the traction mechanism 2c is inserted into the opening groove 3b of the sub-disc 3, and the sub-disc 3 is pulled toward the second conveying mechanism 2b, so that the sub-disc 3 gradually detaches from the first conveying mechanism 1a on the mother disc 1 until the sub-disc 3 is completely returned to the second conveying mechanism 2b, completing the separation of the sub-disc 3 from the mother disc 1, and then allowing the AGV or other logistics conveying system to transport the sub-disc 3 away.

[0038] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A device for long-distance machine tool pallet exchange, comprising a mother pallet (1), an intermediate station (2) and a daughter pallet (3), characterized in that: The master disc (1) is used for being mounted on a machine tool workbench. The master disc (1) is provided with a first conveying mechanism (1a), a lifting cylinder (1b) and a zero-point positioning system (1c). The zero-point positioning system (1c) is arranged in the middle of the first conveying mechanism (1a). The lifting cylinder (1b) is arranged in the middle of the zero-point positioning system (1c). The intermediate station (2) is used for being arranged between the master disc (1) and the machine tool door. The intermediate station (2) includes a support seat (2a). The support seat (2a) is provided with a second conveying mechanism (2b). The second conveying mechanism (2b) is provided with a traction mechanism (2b) in the middle. c), the second conveying mechanism (2b) and the first conveying mechanism (1a) are docked to form a travel track of the sub-disc (3); the traction mechanism (2c) and the sub-disc (3) are detachably connected, and the traction mechanism (2c) is used to traction the sub-disc (3) from the second conveying mechanism (2b) to the first conveying mechanism (1a) or to move from the first conveying mechanism (1a) to the second conveying mechanism (2b); a positioning pin (3a) cooperating with the zero-point positioning system (1c) is provided below the sub-disc (3); the sub-disc (3) is positioned and locked with the mother disc (1) through the zero-point positioning system (1c).

2. The device for long-distance machine tool pallet exchange according to claim 1, characterized in that: The first conveying mechanism (1a) comprises two parallel first conveying guide rails (1a1) and two first limiting baffles (1a2) respectively arranged on the outside of the corresponding first conveying guide rails (1a1). The two first limiting baffles (1a2) form a first channel for the sub-disc (3) to pass above the mother disc (1). The width of the first channel is 2 mm larger than the width of the corresponding part of the sub-disc (3).

3. The device for long-distance machine tool pallet exchange according to claim 2, characterized in that: The second conveying mechanism (2b) comprises two parallel second conveying guide rails (2b1) and two second limit baffles (2b2) ​​respectively arranged on the outside of the corresponding second conveying guide rails (2b1). The two second limit baffles (2b2) ​​form a second channel for the sub-disc (3) to pass above the intermediate station (2). The width of the second channel is 4 mm larger than the width of the corresponding part of the sub-disc (3).

4. The device for long-distance machine tool pallet exchange according to claim 3, characterized in that: The second limit baffle (2b2) ​​is slidably connected to the intermediate station (2) via two parallel miniature guide rails (2b3), wherein the miniature guide rails (2b3) are perpendicular to the moving direction of the sub-disk (3), and a driving oil cylinder (2b4) is provided on one side of the second limit baffle (2b2).

5. The device for long-distance machine tool pallet exchange according to claim 3 or 4, characterized in that: The first conveying guide rail (1a1) and the second conveying guide rail (2b1) are both composed of a plurality of screw-type universal balls arranged at equal intervals.

6. A device for long-distance machine tool pallet exchange according to any one of claims 1 to 4, characterized in that: The mother disc (1) is also provided with a positioning block, which is located on the side of the zero-point positioning system (1c) away from the intermediate station (2), and is used to limit the front end of the sub-disc (3).

7. A device for long-distance machine tool pallet exchange according to any one of claims 1 to 4, characterized in that: The traction mechanism (2c) comprises a mounting frame (2c1), a driving wheel (2c2), a driven wheel (2c3), a chain (2c4), a driving motor (2c5) and a traction pin (2c6); the mounting frame (2c1) is arranged transversely in the middle of the support seat (2a); the driving wheel (2c2) and the driven wheel (2c3) are arranged on the upper surface of the mounting frame (2c1) in a front-to-rear manner along the conveying direction of the sub-disk (3); and the axis of the driving wheel (2c2) and the driven wheel (2c3) are arranged in a vertical direction; the chain (2c4) is sleeved on the driving wheel ( The sub-disc (3) is mounted on a driven wheel (2c2) and a driven wheel (2c3), the driving motor (2c5) is mounted on the lower surface of the mounting frame (2c1) and its output shaft is coaxially connected to the driving wheel (2c2), and the traction pin (2c6) is mounted on the upper side of the chain (2c4); an L-shaped opening slot (3b) is provided at the bottom of the rear end of the sub-disc (3), and the opening of the opening slot (3b) is located on the rear end surface of the sub-disc (3); and the traction pin (2c6) can be engaged in the opening slot (3b) or disengaged from the opening slot (3b) under the drive of the driving motor (2c5).

8. The device for long-distance machine tool pallet exchange according to claim 7, characterized in that: The traction mechanism (2c) further comprises a tensioning wheel (2c7), which is arranged between the driving wheel (2c2) and the driven wheel (2c3), and the position of the tensioning wheel (2c7) is adjustable in a direction perpendicular to the travel direction of the sub-disk (3).

9. The device for long-distance machine tool pallet exchange according to claim 8, characterized in that: The traction mechanism (2c) further comprises a slide rail (2c8), a slider (2c9) and a telescopic oil cylinder (2c10); the slide rail (2c8) is mounted on the intermediate station (2) along the travel direction of the sub-disk (3); the mounting frame (2c1) is slidably connected to the slide rail (2c8) via the slider (2c9); and the telescopic oil cylinder (2c10) is connected to the slider (2c9).

10. The device for long-distance machine tool pallet exchange according to any one of claims 1 to 4, characterized in that: A positioning sleeve (3c) is provided in the middle of the sub-plate (3), and a joint (1d) matching the positioning sleeve (3c) is provided on the top of the lifting oil cylinder (1b).

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