A CNC tool magazine

Abstract

The present invention relates to the technical field of CNC machine tool structure, specifically a CNC tool magazine, including a spindle box, a spindle, a tool magazine assembly, a first mechanical arm, a second mechanical arm and a splash plate, the spindle passes through the center of the bottom of the spindle box and is fixedly connected to the internal power assembly of the spindle box, the center of the bottom of the spindle box is fixedly connected with a fixed boss and the center hole has the same diameter as the through hole, the lower surface of the fixed boss is fixedly connected with the tool magazine assembly, the tool magazine assembly adopts a compound disc structure, the lower surface of the tool magazine assembly is fixedly connected with the splash plate, the four corners of the splash plate are respectively penetrated and connected with four fixed pull rods and fixedly connected to the lower end of the fixed pull rod, the upper end of the fixed pull rod is fixedly connected to the spindle box, and the first mechanical arm and the second mechanical arm are arranged at the lower position of the two opposite sides of the spindle box. By adopting the compound disc structure, the number of tools that can be accommodated is increased, the application range of the machining center is wider, the processing capacity for complex workpieces is greatly improved, and working hours are saved.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tool structures, in particular to a CNC tool magazine. Background Art

[0002] In an integrated CNC machining center, the machining of a part may involve multiple machining methods, which requires the use of multiple tools. The tool magazine system solves this problem. When the machining method needs to be changed, the tool changing system can be used to change the tool for the spindle, so that the tool needed for the next process can be replaced on the spindle and the removed tool can be returned to its position.

[0003] Germany's Julang Co., Ltd. has developed an umbrella-type tool magazine quick tool change system, which installs the tool magazine on the spindle system to shorten the tool change stroke to a minimum. At the same time, each tool position is equipped with an independent hydraulic mechanical arm, so that the process of changing new tools and returning old tools to their original positions can be carried out at the same time, which greatly saves tool change time, shortens working hours, improves work efficiency, and makes the operation of the machining center smoother.

[0004] Most of the above-mentioned tool magazines on the market currently have a small capacity and can accommodate a limited number of tools. They are only suitable for small vertical machine tools, which greatly limits the processing capabilities for complex workpieces. Summary of the invention

[0005] The purpose of the present invention is to provide a CNC tool magazine. The specific problem to be solved by the present invention is that the tool magazine has a small capacity and can accommodate a limited number of tools, and is only suitable for small vertical machine tools, which greatly limits the processing capacity for complex workpieces.

[0006] A CNC tool magazine comprises a spindle box, a spindle, a tool magazine assembly, a first mechanical arm, a second mechanical arm and a splash guard, wherein the spindle passes through the bottom center of the spindle box and is fixedly connected to a power assembly inside the spindle box, the bottom center of the spindle box is fixedly connected with a fixed boss and the center hole has the same diameter as the through hole, the lower surface of the fixed boss is fixedly connected with the tool magazine assembly, the tool magazine assembly adopts a compound disc structure, which greatly improves the tool capacity of the tool magazine and increases the processing methods supported by the machine tool, the lower surface of the tool magazine assembly is fixedly connected with the splash guard, the setting of the splash guard protects the tool magazine assembly and prevents processing flying chips from damaging the tool magazine assembly and the tool handle, the four corners of the splash guard are respectively penetrated by four fixed pull rods and are fixedly connected to the lower ends of the fixed pull rods, the upper ends of the fixed pull rods are fixedly connected to the spindle box, so that the splash guard has a certain supporting effect on the overall tool magazine assembly, and the first mechanical arm and the second mechanical arm are arranged at the lower positions on the opposite sides of the spindle box.

[0007] Preferably, the central inner diameters of the tool magazine assembly, the fixed boss and the splash plate should all be slightly larger than the diameter of the main shaft so that the rotation of the main shaft will not affect other components.

[0008] Preferably, a bearing is installed between the upper surface of the tool magazine assembly and the upper fixed boss, and the tool magazine assembly includes four tool discs of different sizes, the inner rings of the tool discs have the same structure, and the outer ring diameters of the tool discs decrease from top to bottom. Through this design, it is avoided that the tools on two adjacent tool discs interfere with each other, which affects the tool changing process or causes damage to the tool magazine assembly. At the same time, the spacing between two adjacent tool discs can be appropriately reduced, and the vertical size of the space can be reduced. The number of tool holders in one circle of the tool disc is twelve, ten, eight, and six from top to bottom, respectively. The outer ring of the tool disc is fixedly connected to a plurality of tool holders, and the number of tool holders in the outer ring of the tool disc decreases in an arithmetic progression from top to bottom. The adjacent tool discs are rotatably connected by bearings to ensure that each tool disc can rotate independently without affecting other components. The tool magazine assembly is placed on top of the splash guard, and the splash guard and the tool magazine assembly are rotatably connected by bearings. The use of the above bearings enables each tool disc to operate independently without affecting other components. The inner wall of the inner ring of the tool disc is provided with a groove, and the groove An electromagnet is embedded on the inner wall away from the main shaft, and a group of springs are fixedly connected to the surface of the electromagnet, and a card block is fixedly connected to the other end of the spring. The other two side walls of the card block are slidably connected to the groove, and a card slot is opened on the main shaft at a relative height to the groove. The electromagnet on each tool placement disc is controlled separately. When the tool change process is started, the electromagnet of the tool placement disc where the new tool is required is powered off and demagnetized, and the card block loses the attraction of the electromagnet and slides into the card slot under the action of the spring. The corresponding tool placement disc rotates together with the main shaft. When it rotates to a suitable position, the main shaft stops, and one of the first mechanical arm and the second mechanical arm goes to the corresponding tool holder to take the new tool, and the other goes to the end of the main shaft to take the old tool. Then the main shaft rotates, and the mechanical arm holding the new tool goes to the main shaft to install the tool, and the mechanical arm holding the old tool goes to the vacant tool holder to place the tool. At the same time, according to the design of the software program, when the tool placement disc is in the docking position, between the two adjacent tool placement discs, the tool holder of the lower tool placement disc is always between the two tool holders of the upper tool placement disc, which further avoids the tool handle from being damaged by collision. Through this design, each tool disc can move independently of other components, which improves the accuracy of tool change. At the same time, the tool magazine does not need an additional power and control system, which reduces the travel of the entire system and reduces costs.

[0009] Preferably, the slot and the block are matched with zero clearance to ensure that when the block slides into the slot, no mechanical vibration occurs between the cutter disc and the main shaft.

[0010] Preferably, all the bearings are thrust roller bearings, which can better adapt to the movement environment of the tool magazine assembly.

[0011] Preferably, the inner wall of the tool holder and the inner wall of the clamping part of the robot arm are both made of rubber material. The clamping position of the robot arm during the tool changing process should be the lower cylindrical part of the tool handle. By setting the rubber material, the tool handle part can be better protected, which plays a certain safety role.

[0012] Preferably, the clamping block is made of carbon steel, and a layer of vulcanized rubber is fixedly connected to the outer surface of the clamping block on the side close to the main shaft. The vulcanized rubber is a wear-resistant flexible material. Through this design, the clamping block can work normally under the influence of the electromagnet on the one hand, and on the other hand, the clamping block will not cause wear to the main shaft when it loses the attraction of the electromagnet and bounces toward the main shaft and slides on the surface of the main shaft until it slides into the clamping slot.

[0013] Preferably, the first robotic arm and the second robotic arm are controlled by two independent control systems and power systems. Through this arrangement, the two robotic arms can operate independently without interfering with each other, so that the process of replacing the new knife and returning the old knife to its original position can be carried out simultaneously, saving working hours and improving work efficiency.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The tool magazine assembly of the present invention adopts a compound disc structure. The number of tool holders for the four layers of tool discs from top to bottom is twelve, ten, eight, and six respectively. Together with the tool at the end of the spindle, the tool magazine can accommodate a total of thirty-seven different tools. Compared with the Julang rapid tool change system, the tool magazine has greatly increased the tool capacity and increased the processing methods supported by the machine tool;

[0016] 2. The present invention adopts a compound structure diameter design to make the diameter of the cutter disc decrease from top to bottom, and the machining center software system jointly controls that when the cutter disc is in the docking position, the tool holder of the lower cutter disc between two adjacent cutter discs is always between the two tool holders of the upper cutter disc, further avoiding the tool handle from being damaged by collision. When the robot arm clamps the tool, it selects to clamp the lower cylindrical part of the tool handle, and avoids the lower part of the tool from bumping into the tool magazine assembly or the tool itself during the process of taking and placing the tool;

[0017] 3. The present invention designs an independent electromagnet and a card block slot of the tool placement disc, so that each tool placement disc can operate independently of other components. When the tool change process starts, the electromagnet of the tool placement disc where the new tool is needed is powered off and demagnetized, and the card block loses the attraction of the electromagnet and slides into the card slot under the action of the spring. The corresponding tool placement disc rotates together with the spindle. When it rotates to a suitable position, the spindle stops, and one of the first mechanical arm and the second mechanical arm goes to the corresponding tool holder to take the new tool, and the other goes to the end of the spindle to take the old tool. Then the spindle rotates a certain angle, and at the same time, the mechanical arm holding the new tool goes to the spindle to install the tool, and the mechanical arm holding the old tool goes to the vacant tool holder to place the tool, thereby improving the accuracy of tool change;

[0018] 4. The present invention provides two independent control and power systems for the first robot arm and the second robot arm respectively, so that the two robot arms can operate independently without interfering with each other, and the two processes of replacing the new tool and returning the old tool to its original position can be carried out simultaneously, saving the working hours of the entire tool changing process. At the same time, the spindle assembly and the tool magazine assembly do not need to undergo large spatial travel changes, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 An enlarged view of point I in FIG.

[0021] Figure 3 A top view of the cutter disc of the present invention;

[0022] Figure 4 A half-section view of the front view of the cutter disc of the present invention;

[0023] Figure 5 For the present invention Figure 4 Cross-sectional view at AA in .

[0024] In the figure: spindle box 1, spindle 2, slot 21, tool magazine assembly 3, tool tray 31, tool holder 32, groove 33, electromagnet 34, spring 35, block 36, first robotic arm 4, second robotic arm 5, splash plate 6, fixed pull rod 7. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 5In the embodiment of the present invention, a CNC tool magazine includes a spindle box 1, a spindle 2, a tool magazine assembly 3, a first mechanical arm 4, a second mechanical arm 5 and a splash plate 6. The spindle 2 passes through the bottom center of the spindle box 1 and is fixedly connected to the power assembly inside the spindle box 1. The bottom center of the spindle box 1 is fixedly connected with a fixed boss, and the center hole has the same diameter as the through hole. The lower surface of the fixed boss is fixedly connected with the tool magazine assembly 3. The tool magazine assembly 3 adopts a compound disc structure, which greatly improves the tool capacity of the tool magazine and increases the processing methods supported by the machine tool. A splash guard 6 is fixedly connected to the lower surface of the tool magazine assembly 3. The setting of the splash guard 6 protects the tool magazine assembly 3 and prevents machining flying chips from causing damage to the tool magazine assembly 3 and the tool handle. Four fixed pull rods 7 are respectively penetrated and connected to the four corners of the splash guard 6 and are fixedly connected to the lower ends of the fixed pull rods 7. The upper ends of the fixed pull rods 7 are fixedly connected to the spindle box 1, so that the splash guard 6 has a certain supporting effect on the overall tool magazine assembly 3. The first mechanical arm 4 and the second mechanical arm 5 are arranged at the lower positions on the opposite sides of the spindle box 1.

[0027] As an embodiment of the present invention, the central inner diameters of the tool magazine assembly 3, the fixed boss and the splash plate 6 should be slightly larger than the diameter of the spindle 2 so that the rotation of the spindle 2 will not affect other components.

[0028] As an embodiment of the present invention, a bearing is installed between the upper surface of the tool magazine assembly 3 and the upper fixed boss. The tool magazine assembly 3 includes four tool discs 31 of different sizes. The inner rings of the tool discs 31 have the same structure. The outer ring diameters of the tool discs 31 decrease from top to bottom. Through this design, it is avoided that the tools on two adjacent tool discs 31 interfere with each other, affect the tool changing process or cause damage to the tool magazine assembly 3. At the same time, the spacing between two adjacent tool discs 31 can be appropriately reduced, and the vertical dimension of the space can be reduced. The outer ring of the tool disc 31 is fixedly connected to a plurality of tool holders 32. The number of tool holders 32 on the outer ring of the tool disc 31 is From top to bottom, the number of tool holders 32 in a circle of the tool disc 31 is twelve, ten, eight, and six, respectively. Adjacent tool discs 31 are rotatably connected by bearings to ensure that each tool disc 31 can rotate independently without affecting other components. The tool magazine assembly 3 is placed on the top of the splash plate 6, and the splash plate 6 is rotatably connected to the tool magazine assembly 3 by bearings. The use of the above bearings enables each tool disc 31 to operate independently without affecting other components. A groove 33 is provided on the inner wall of the inner circle of the tool disc 31, and a groove 33 is embedded on the inner wall away from the main shaft 2. An electromagnet 34 is inserted, and a group of springs 35 are fixedly connected to the surface of the electromagnet 34. A card block 36 is fixedly connected to the other end of the spring 35. The other two side walls of the card block 36 are slidably connected to the groove 33. A card slot 21 is opened at a height relative to the groove 33 on the spindle 2. The electromagnet 34 on each tool disc 31 is controlled separately. When the tool changing process starts, the electromagnet 34 of the tool disc 31 where the new tool is required is powered off and demagnetized, and the card block 36 loses the attraction of the electromagnet 34 and slides into the card slot 21 under the action of the spring 35. The corresponding tool disc 31 rotates together with the spindle 2. When it rotates to a suitable When the spindle 2 is in the parking position, one of the first robot arm 4 and the second robot arm 5 goes to the corresponding tool holder 32 to get the new tool, and the other goes to the end of the spindle 2 to take the old tool. Then the spindle 2 rotates a certain angle, and the robot arm holding the new tool goes to the spindle 2 to install the tool, and the robot arm holding the old tool goes to the vacant tool holder 32 to put the tool. At the same time, according to the design of the software program, when the tool tray 31 is in the parking position, between the two adjacent tool trays 31, the tool holder 32 of the lower tool tray 31 is always between the two tool holders 32 of the upper tool tray 31, further avoiding the tool handle from being damaged by collision. Through this design method, each tool tray 31 can move independently of other components, which improves the accuracy of tool change, and at the same time, the tool magazine does not need an additional power and control system, reducing the travel of the entire system and reducing costs.

[0029] As an implementation mode of the present invention, the clamping slot 21 and the clamping block 36 are matched with zero clearance to ensure that when the clamping block 36 slides into the clamping slot 21, no mechanical vibration occurs between the cutter disc 31 and the spindle 2.

[0030] As an implementation mode of the present invention, all the above-mentioned bearings are thrust roller bearings, which can better adapt to the movement environment of the tool magazine assembly 3.

[0031] As an embodiment of the present invention, the inner wall of the tool holder 32 and the inner wall of the clamping part of the robotic arm are both made of rubber material. The clamping position of the robotic arm during the tool changing process should be the lower cylindrical part of the tool handle. By setting the rubber material, the tool handle part can be better protected, which plays a certain safety role.

[0032] As an embodiment of the present invention, the block 36 is made of carbon steel, and a layer of vulcanized rubber is fixedly connected to the outer surface of the block 36 on the side close to the main shaft 2. The vulcanized rubber is a wear-resistant flexible material. Through this design, the block 36 can work normally under the influence of the electromagnet 34 on the one hand, and on the other hand, the block 36 will not cause wear to the main shaft when it loses the attraction of the electromagnet 34 and bounces toward the main shaft and slides on the surface of the main shaft until it slides into the slot 21.

[0033] As an embodiment of the present invention, the first robotic arm 4 and the second robotic arm 5 are controlled by two independent control systems and power systems. Through this setting, the two robotic arms can operate independently without interfering with each other, so that the process of replacing the new knife and returning the old knife to its original position can be carried out simultaneously, saving working hours and improving work efficiency.

[0034] Working principle: By setting up the structure of the compound tool tray 31, the capacity of the tool magazine is increased, and independent power systems and control systems are set for the first robotic arm 4 and the second robotic arm 5 respectively, so that the first robotic arm 4 and the second robotic arm 5 can operate independently without interfering with each other, so that the process of replacing a new knife and returning the old knife to its original position can be carried out at the same time, saving working hours and improving work efficiency. When the tool changing process is started, the electromagnet 34 of the tool disc 31 where the new tool is needed is powered off and demagnetized, and the clamping block 36 loses the attraction of the electromagnet 34 and slides into the clamping slot 21 under the thrust of the spring 35, and the corresponding tool disc 31 rotates with the spindle 2. When it rotates to the appropriate position, the spindle 2 stops, and one of the first robotic arm 4 and the second robotic arm 5 goes to the corresponding tool holder 32 to take the new tool, and the other goes to the end of the spindle 2 to take the old tool. Then the spindle 2 rotates a certain angle, and the robotic arm holding the new tool goes to the spindle 2 to install the tool, and the robotic arm holding the old tool goes to the vacant tool holder 32 to place the tool. At the same time, according to the design of the software program, when the tool disc 31 is in the docking position, between the two adjacent tool discs 31, the tool holder 32 of the lower tool disc 31 is always between the two tool holders 32 of the upper tool disc 31, further avoiding the tool handle part from being bumped and damaged. Through this design, each tool disc 31 can move independently of other components, which improves the accuracy of tool change. At the same time, the tool magazine does not need an additional power and control system, which reduces the travel of the entire system and reduces costs.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A CNC tool magazine, comprising a spindle box (1), a spindle (2), a tool magazine assembly (3), a first mechanical arm (4), a second mechanical arm (5) and a splash plate (6), characterized in that: The spindle (2) passes through the center of the bottom of the spindle box (1) and is fixedly connected to the power component inside the spindle box (1); the center of the bottom of the spindle box (1) is fixedly connected to a fixed boss and the center hole has the same diameter as the through hole; the lower surface of the fixed boss is fixedly connected to a tool magazine component (3); the tool magazine component (3) adopts a compound disc structure; the lower surface of the tool magazine component (3) is fixedly connected to a splash plate (6); four fixed pull rods (7) are respectively passed through and connected at the four corners of the splash plate (6) and are fixedly connected to the lower ends of the fixed pull rods (7); the upper ends of the fixed pull rods (7) are fixedly connected to the spindle box (1); the first mechanical arm (4) and the second mechanical arm (5) are arranged at the lower positions of the two opposite side surfaces of the spindle box (1); The center inner diameters of the tool magazine assembly (3), the fixed boss and the splash plate (6) should all be slightly larger than the diameter of the spindle (2); A bearing is installed between the upper surface of the tool magazine assembly (3) and the upper fixed boss. The tool magazine assembly (3) includes four tool discs (31) of different sizes. The inner rings of the tool discs (31) have the same structure. The outer ring diameters of the tool discs (31) decrease from top to bottom. The outer rings of the tool discs (31) are fixedly connected to a plurality of tool holders (32). The number of tool holders (32) on the outer rings of the tool discs (31) decreases from top to bottom in an arithmetic progression. Adjacent tool discs (31) are rotatably connected via bearings. The tool magazine assembly (3) is placed on top of a splash plate (6), and the splash plate (6) is connected to the tool discs (31). The tool magazine components (3) are rotatably connected to each other via bearings; a groove (33) is provided on the inner wall of the inner ring of the tool placement disc (31); an electromagnet (34) is embedded on the inner wall of the groove (33) away from the main shaft (2); a group of springs (35) are fixedly connected to the surface of the electromagnet (34); a clamping block (36) is fixedly connected to the other end of the spring (35); the other two side walls of the clamping block (36) are slidably connected to the groove (33); a clamping groove (21) is provided on the main shaft (2) at a height relative to the groove (33); and each electromagnet (34) on the tool placement disc (31) is controlled individually.

2. A CNC tool magazine according to claim 1, characterized in that: There is zero clearance between the clamping slot (21) and the clamping block (36).

3. A CNC tool magazine according to claim 1, characterized in that: The bearings are all thrust roller bearings.

4. A CNC tool magazine according to claim 1, characterized in that: The inner wall of the tool holder (32) and the inner wall of the clamping part of the mechanical arm are both made of rubber material.

5. A CNC tool magazine according to claim 1, characterized in that: The clamping block (36) is made of carbon steel, and a layer of vulcanized rubber is fixedly connected to the outer surface of the clamping block (36) on the side close to the main shaft (2).

6. A CNC tool magazine according to claim 1, characterized in that: The first mechanical arm (4) and the second mechanical arm (5) are controlled by two independent control systems and power systems.

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