Door opening and closing device for tool magazine, chain type tool magazine and machine tool

Abstract

The invention relates to the technical field of CNC machine tools, and provides a door opening and closing device for a tool magazine, a chain-type tool magazine and a machine tool, the door opening and closing device is used for being arranged on a tool conveying structure and a magazine doorway, the door opening and closing device comprises a guide rail, a door opening and closing device and a door opening and closing device, the guide rail is arranged on the tool conveying structure, a guide groove is formed in the guide rail, and the guide groove is provided with an inclined section and a horizontal section; the edge of one side of the door body is hinged to the garage door opening, a switch datum plane is formed on the hinge axis, and the switch datum plane is parallel to the inner side surface of the door body and penetrates through the hinge axis; the sliding part is arranged on the side, facing the garage door opening, of the door body and movably embedded in the guide groove, and the sliding part deviates from the switch reference surface; the guide rail is driven by movement of the cutter conveying structure in the in-out direction so that the sliding piece can move in the inclined section and the horizontal section. The problems that in the prior art, the stroke of a connecting rod mechanism is small, and the opening angle of opening doors on the two sides cannot meet the opening requirement of the tool magazine are solved.

Description

Technical Field

[0001] The present application relates to the technical field of CNC machine tools, and more specifically, to a door opening and closing device for a tool magazine, a chain-type tool magazine, and a machine tool. Background Art

[0002] Numerical control machine tools (CNC machine tools) have been widely used in the processing of precision parts or products due to their advantages such as small volume and high machining accuracy. However, with the continuous improvement of product complexity and processing requirements, existing CNC machine tools are required to have a sufficiently large tool magazine capacity. Therefore, existing CNC machine tools usually come with disc tool magazines and chain-type tool magazines. The chain-type tool magazine is a tool storage or tool change device for a numerical control machining center, and it has been increasingly widely used in CNC machine tools due to its large capacity. For example, chain-type tool magazines are usually used in numerical control machining centers.

[0003] In the existing chain-type tool magazines during the tool change process, it is necessary to push out or retract the tool transmission structure from the magazine door opening. Thus, it is necessary to open or close the door body on the magazine door opening during the process of the tool transmission structure moving in and out. In the solution with the publication number CN113118839A and the patent name "A Chain-Type Tool Magazine", a connecting rod mechanism is used to open the door from both sides. Using the connecting rod mechanism limits the stroke of the tool transmission structure therein, resulting in a relatively small stroke, and the opening angles of opening the door from both sides cannot meet the opening requirements of the tool magazine.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The purpose of the present application is to provide a door opening and closing device for a tool magazine, a chain-type tool magazine, and a machine tool, which solves the problem that in the existing technology, the stroke of using a connecting rod mechanism is relatively small, and the opening angles of opening the door from both sides cannot meet the opening requirements of the tool magazine.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0007] On the one hand, the present application provides a door opening and closing device for a tool magazine, which is used to be arranged on a tool transmission structure and a magazine door opening. Among them, the door opening and closing device includes: a guide rail, the guide rail is arranged on the tool transmission structure, and a guide groove is arranged on the guide rail, and the guide groove has an inclined section and a horizontal section;

[0008] A door body, one side edge of the door body is hinged on the magazine door opening, and a switching reference plane is formed on the hinge axis, wherein the switching reference plane is parallel to the inner surface of the door body and passes through the hinge axis;

[0009] A sliding member, the sliding member is arranged on the side of the door body facing the magazine door opening and is movably embedded in the guide groove, and the sliding member deviates from the switching reference plane;

[0010] The guide rail is driven by the movement of the tool transmission structure in the in-and-out direction, so that the sliding member moves within the inclined section and the horizontal section;

[0011] When the sliding member moves from the inclined section to the horizontal section, the sliding member pushes the door body to rotate outward around the hinge to open the storage door opening;

[0012] When the sliding member moves from the horizontal section to the inclined section, the sliding member pushes the door body to rotate inward around the hinge to close the storage door opening.

[0013] Optionally, the sliding member includes: a pulley seat fixedly arranged on the inner surface of the door body;

[0014] A guiding roller rotatably arranged on the pulley seat.

[0015] Optionally, a first acute angle a is formed between the inclined section and the horizontal section, a connecting line between the hinge axis and the rotation center of the guiding roller forms an eccentric line, and a deflection angle b is formed between the eccentric line and the switching reference plane, where 2.5b < a and a < 3b.

[0016] Optionally, when the door body closes the storage door opening, the center line of the chute in the horizontal section is located between the hinge axis and the guiding roller;

[0017] The distance between the center line of the chute in the horizontal section and the hinge axis is a first distance L1, and the distance between the center line of the chute in the horizontal section and the axis of the guiding roller is a second distance L2, where L1:L2 = 0.75 - 0.9.

[0018] Optionally, the guide rail forms an upper side edge and a lower side edge through a guiding groove, and the thickness of the upper side edge is less than that of the lower side baffle.

[0019] Optionally, the guide rail is arranged on the tool transmission structure through a door-pushing bracket;

[0020] The door-pushing bracket includes: a bottom plate, a support plate and a bearing plate, and the bottom plate, the support plate and the bearing plate are in a Z-shaped structure;

[0021] A kidney-shaped hole is formed in the bottom plate, and the bottom plate is connected to the tool transmission structure by passing a screw through the kidney-shaped hole;

[0022] The guide rail is fixed on the bearing plate.

[0023] Optionally, a buffer block is arranged on the inner surface of the door body.

[0024] On the other hand, the present application also proposes a chain-type tool magazine, including: a storage door opening, a tool transmission structure and the door opening and closing device for the tool magazine as described above;

[0025] The tool transmission structure enters and exits the tool magazine through the storage door opening.

[0026] Optionally, the tool transfer structure is connected to an in-out power assembly, and the tool transfer structure moves in and out of the storage door opening under the drive of the in-out power assembly;

[0027] During the door opening process: The in-out power assembly first drives the tool transfer structure and the guide rail to move outward synchronously at a first speed, and then drives the tool transfer structure and the guide rail to move outward synchronously at a second speed, where the first speed is less than the second speed, and the first speed V1 is positively correlated with the diameter D1 of the axle. where D0 is the initial limit diameter of the axle, K is a constant, and V2 is the second speed;

[0028] During the door closing process, the in-out power assembly first drives the tool transfer structure and the guide rail to move outward synchronously at a third speed, and then drives the tool transfer structure and the guide rail to move outward synchronously at a fourth speed, and the third speed is greater than the fourth speed.

[0029] In a third aspect, the present application also proposes a machine tool, which includes the chain-type tool magazine as described above.

[0030] The beneficial effects of a door opening and closing device for a tool magazine, a chain-type tool magazine, and a machine tool provided by the present application are at least as follows: By providing a guide rail on the tool transfer structure, one side edge of the door body is hinged to the storage door opening, and the guide groove on the guide rail cooperates with the sliding member on the door body. Since the sliding member is eccentrically arranged, when the guide rail is driven to move in the in-out direction through the tool transfer structure, the sliding member moves within the inclined section and the horizontal section. The inclined section is inclined upward in the direction from outside to inside, and the horizontal section can be horizontally arranged. When the sliding member moves within the inclined section, the inclined guide groove pushes the sliding member to slide, and further pushes the door body to flip around the hinge axis. When the sliding member moves within the horizontal section, the door body is kept in the state of the maximum opening degree, so that the tool transfer structure can continue to move out or move into the storage door opening without being affected. In this way, through the cooperation of the inclined section and the horizontal section, the door body is continuously kept in the maximum opening degree, and the stroke of the tool transfer structure is not limited. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a cross-sectional view of a chain-type tool magazine provided by an embodiment of the present application;

[0033] Figure 2 It is a cross-sectional view of another perspective of a chain-type tool magazine provided by an embodiment of the present application;

[0034] Figure 3 A cross-sectional view of a door opening and closing device for a tool magazine provided by an embodiment of the present application;

[0035] Figure 4 A state diagram of a door opening and closing device for a tool magazine provided by an embodiment of the present application during the door opening process, where Figure 4 Figure (a) in it is a schematic structural diagram at the moment of closing the door, where Figure 4 Figure (b) in it is a schematic structural diagram at the lowest point moment;

[0036] Figure 5 A state diagram of a door opening and closing device for a tool magazine provided by an embodiment of the present application during the door opening process, where Figure 5 Figure (c) in it is a schematic structural diagram at the starting point moment of the arc segment, where Figure 5 Figure (d) in it is a schematic structural diagram on the horizontal segment.

[0037] Among them, each reference numeral in the figure:

[0038] 100, tool magazine entrance; 200, tool transmission structure; 300, entrance and exit power component; 400, guide rail; 410, guide groove; 420, inclined segment; 425, arc segment; 430, horizontal segment; 440, upper side edge; 450, lower side edge; 500, door body; 510, hinge point; 520, buffer block; 600, sliding member; 610, pulley seat; 620, guide roller; 630, axle; 700, door pushing support; 710, bottom plate; 711, waist-shaped hole; 720, support plate; 730, bearing plate. Detailed implementation manners

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positions shown in the drawings, and are only for convenience of description and should not be construed as limiting the technical solution of the present invention. The terms "first" and "second" are only used for convenience of description and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0041] Embodiment 1

[0042] As Figure 1 、 Figure 2 As shown, this embodiment provides a door opening and closing device for a tool magazine, which is used to be disposed on the tool magazine. The tool magazine can be a chain-type tool magazine or a disc-type tool magazine. This embodiment takes the chain-type tool magazine as an example to illustrate the structure. A magazine door opening 100 is provided on the chain-type tool magazine, and the chain-type tool magazine is communicated with the machining area of the machine tool through the magazine door opening 100. During the machining process of the tool on the machine tool, the magazine door opening 100 is closed, and the tool transmission structure 200 is located inside the tool magazine; when tool changing is to be performed, the magazine door opening 100 is opened, the tool transmission structure 200 is pushed out from the magazine door opening 100 to the machining area, then the tool on the machine tool spindle is placed into the tool transmission structure 200, and then the tool to be changed on the tool transmission structure 200 is placed on the machine tool spindle. After the tool change is completed, the tool transmission structure 200 is dragged back into the tool magazine from the magazine door opening 100 to complete the tool change process. Therefore, the door opening and closing device for the tool magazine in this embodiment is used to be disposed on the tool transmission structure 200 and the magazine door opening 100, mainly to correspondingly open and close the magazine door opening 100 when the tool transmission structure 200 enters and exits the magazine door opening 100.

[0043] As Figure 1 、 Figure 2As shown in the figure, the door opening and closing device for the tool magazine in this embodiment mainly includes: a guide rail 400, a door body 500, and a sliding member 600. The guide rail 400 is arranged on the tool transmission structure 200, and a guide groove 410 is arranged on the guide rail 400. The guide groove 410 has an inclined section 420 and a horizontal section 430. One side edge of the door body 500 is hinged on the magazine entrance 100, and a switching reference plane is formed on the hinge axis, wherein the switching reference plane is parallel to the inner surface of the door body 500 and passes through the hinge axis; the sliding member 600 is arranged on the side of the door body 500 facing the magazine entrance 100 and is movably embedded in the guide groove 410, and the sliding member 600 deviates from the switching reference plane; the guide rail 400 is driven by the movement of the tool transmission structure 200 in the in-out direction, so that the sliding member 600 moves within the inclined section 420 and the horizontal section 430. As Figure 1 , Figure 5 shown in figure (d) in Figure 1 , Figure 4 , when the sliding member 600 moves from the inclined section 420 to the horizontal section 430, the sliding member 600 pushes the door body 500 to rotate outward around the hinge point 510 to open the magazine entrance 100. As Figure 5 shown in figure (b) in Figure 5 and figure (c) in Figure 1 , Figure 4 , when the sliding member 600 moves from the horizontal section 430 to the inclined section 420, the sliding member 600 pushes the door body 500 to rotate inward around the hinge point 510 to close the magazine entrance 100. For the convenience of structural description, taking the example of upward flipping to open or close the magazine entrance 100, the side going out from the magazine entrance 100 is the outer side (front side), and the side entering the magazine entrance 100 is the inner side (rear side). In the specific structure, the magazine entrance 100 has a door frame, and the upper edge of the door body 500 can be connected to the upper beam of the door frame through a plurality of hinges, and the rotation center axis of the hinge is used as the hinge axis, so that the door body 500 can rotate upward or downward around the hinge axis, rotating upward to open the magazine entrance 100, and rotating downward to close the magazine entrance 100. As Figure 5 shown in figure (d) in Figure 1 , Figure 4 , along the direction from inside to outside (from rear to front), the horizontal section 430 of the guide groove 410 extends horizontally for a predetermined length, and its specific length can be set in cooperation with the in-out stroke of the tool transmission structure 200. The longer the in-out stroke of the tool transmission structure 200 is, the longer the length of the horizontal section 430 is. At the front end of the horizontal section 430, it bends downward and forms the inclined section 420 through an arc transition. The inclined section 420 can be a straight line and gradually incline forward along the direction from top to bottom. As Figure 1 , Figure 4 shown in figure (b) in Figure 5 and figure (c) in

[0044] As Figure 1 ,Figure 2 As shown in the figure, the door opening and closing device for the tool magazine in this embodiment is provided with a guide rail 400 on the tool transmission structure 200. One side edge of the door body 500 is hinged to the magazine entrance 100. The guide groove 410 on the guide rail 400 cooperates with the sliding member 600 on the door body 500. Since the sliding member 600 is eccentrically arranged, when the guide rail 400 is driven by the movement of the tool transmission structure 200 in the in-and-out direction, the sliding member 600 moves within the inclined section 420 and the horizontal section 430. The inclined section 420 is inclined upward from the outside to the inside, and the horizontal section 430 can be horizontally arranged. When the sliding member 600 moves within the inclined section 420, the inclined guide groove 410 pushes the sliding member 600 to slide, thereby pushing the door body 500 to flip around the hinge axis. When the sliding member 600 moves within the horizontal section 430, the door body 500 is kept in the state of maximum opening, so that the tool transmission structure 200 can continue to move out or move into the magazine entrance 100 without being affected. In this way, through the cooperation of the inclined section 420 and the horizontal section 430, the door body 500 is continuously kept in the state of maximum opening, and the stroke of the tool transmission structure 200 is not restricted.

[0045] It should be noted that this door opening and closing device can also be arranged at the lower edge, left edge or right edge of the magazine entrance 100. Accordingly, the door body 500 is hinged to the corresponding edge side, and the guide rail 400 is adjusted to the corresponding direction, and the technical problem can also be solved. If multiple tool magazines are arranged side by side, the door body 500 arranged on the left edge or right edge will interfere with the adjacent magazine entrances 100 on both sides. Therefore, the problem can be avoided by adopting the upward-opening door method. If there are two tool magazines, the form of opening the door on the left side on one side and opening the door on the right side on the other side can also be adopted.

[0046] As Figure 1 、 Figure 2 shown, further, the sliding member 600 in this embodiment specifically includes: a pulley seat 610 and a guide roller 620. The pulley seat 610 is fixedly arranged on the inner surface of the door body 500, and the guide roller 620 is rotatably arranged on the pulley seat 610. The pulley seat 610 can adopt an isosceles triangular seat. The bottom surface of the isosceles triangular seat is fixed on the inner surface of the door body 500. The guide roller 620 is connected to the top angle of the isosceles triangular seat through a wheel shaft 630. One end of the wheel shaft 630 is fixed on the isosceles triangular seat, and the guide roller 620 is rotatably arranged on the wheel shaft 630, so as to be located on one side of the isosceles triangular seat. In this way, the connection line between the rotation center of the guide roller 620 and the switching reference plane coincides with the perpendicular bisector of the bottom edge of the isosceles triangular seat. The guide roller 620 can be stably supported through the isosceles triangular seat, improving the stability and load-bearing capacity of the structure.

[0047] As Figure 1 、 Figure 4As shown in Figure (a), further, a first acute angle a is formed between the inclined section 420 and the horizontal section 430 of this embodiment. The connection line between the hinge axis and the rotation center of the guide roller 620 forms an eccentric line, and a deviation angle b is formed between the eccentric line and the switch reference plane. The function of pushing the door is realized jointly by the eccentricity of the guide roller 620 and the inclination of the inclined section 420. When the first acute angle a is set too small, it will cause the flipping to be too long. Although the force on the guide roller 620 is relatively stable during the pushing process, it will increase the length of the part where the inclined section 420 protrudes from the horizontal section 430, so that a very deep concave clearance groove needs to be provided on the inner wall of the door body 500 for cooperation, which increases the overall size of the door body 500 in the front-back direction and results in a large occupied space of the structure. When the first acute angle a is set too large, the force during the flipping process will become larger, making it inconvenient to slide in the guide groove 410. Through research, in the dimension range of 2.5b < a and a < 3b, it can be ensured that the guide roller 620 moves smoothly in the guide groove 410 (stable force), and the inclined section 420 will not protrude from the horizontal section 430 too much, just slightly larger than the outermost dimension of about 10 mm of the tool (general tool shank diameter 30 mm) protruding forward on the tool transmission structure 200. This avoids the collision of the tool conveyed on the tool transmission structure 200 during the opening and closing process of the door body 500, and can also protect the tool on the tool transmission structure 200 when realizing the opening and closing function of the door body 500.

[0048] In the specific structure of this embodiment, when the door body 500 of the tool magazine is in the closed state, the dimension between the hinge axis and the rotation center of the guide roller 620 in the front-back direction (X direction) is 49.4 mm, and the dimension between the hinge axis and the rotation center of the guide roller 620 in the up-down direction (Y-axis direction) is 109 mm. The deviation angle b on the inner side of the door body 500 is set to 24°, and the first acute angle a is 70°. With this structural dimension, while realizing the function of opening and closing the door, it can better cooperate with the tool transmission structure 200 to complete the entry and exit, and the opening and closing of the door body 500 will not interfere with the path of the conveyed tool.

[0049] As Figure 1 、 Figure 4As shown in Fig. (a), further, when the door body 500 closes the storage door opening 100 in this embodiment, the center line of the chute of the horizontal section 430 is located between the hinge axis and the guiding roller 620. The distance between the center line of the chute of the horizontal section 430 and the hinge axis is the first spacing L1, and the distance between the center line of the chute of the horizontal section 430 and the axis of the guiding roller 620 is the second spacing L2, where L1:L2 = 0.75 - 0.9. The horizontal section 430 is arranged such that the center line of its chute is located between the hinge axis and the guiding roller 620 and at a slightly higher position, so that the inclined section 420 can have a longer guiding distance, enabling the guiding roller 620 to have sufficient distance to slide within the inclined section 420 while gradually pushing open the door body 500. This can avoid the situation where the bearing capacity of the guiding roller 620 suddenly changes due to the too-fast opening speed of the door body 500 and prevent jamming. Also, during the lowering process of the door body 500, it can avoid the door body 500 suddenly closing and generating an impact.

[0050] In this embodiment, the first spacing L1 can be 49.2 mm, and the second spacing L2 can be 59.8 mm. Thus, L1:L2 = 0.82 (approx.). In this way, during the process of driving the door body 500 to open and close, the door body 500 can maintain a relatively stable flipping speed, and the coordination between the opening and closing processes and the process of the tool transmission structure 200 entering and leaving the storage door opening 100 is better.

[0051] As Figure 1 、 Figure 2 shown, further, the guide rail 400 of this embodiment forms an upper side edge 440 and a lower side edge 450 through the guide groove 410, and the thickness of the upper side edge 440 is less than that of the lower side edge 450. The guide rail 400 is divided into upper and lower parts with the guide groove 410 as the boundary. The surface of the lower side edge 450 facing the guide groove 410 and the surface of the lower side edge 450 facing the guide groove 410 can be used to contact the guiding roller 620 and push the guiding roller 620 to move for guiding thereon. When the door body 500 is pushed out, the above two edges in the guide groove 410 are used to push out and retract synchronously. Setting the thickness of the lower side baffle to be relatively thick can provide more stable support for the guiding roller 620 during the process of pushing the guiding roller 620 and improve the stability of the structure.

[0052] As Figure 1 、 Figure 3As shown in the figure, further, the guide rail 400 of this embodiment is arranged on the tool transmission structure 200 through the door-pushing bracket 700. The door-pushing bracket 700 specifically includes: a bottom plate 710, a support plate 720, and a bearing plate 730. The bottom plate 710, the support plate 720, and the bearing plate 730 form a Z-shaped structure. A waist-shaped hole 711 is formed on the bottom plate 710, and it is connected to the tool transmission structure 200 by passing a screw through the waist-shaped hole 711. The guide rail 400 is fixed on the bearing plate 730. In the specific structure, the Z-shaped structure formed by the bottom plate 710, the support plate 720, and the bearing plate 730 can provide stable support, and the guide rail 400 can be stably fixed on the tool transmission structure 200. A plurality of round holes are formed on the support plate 720 and the bearing plate 730, which can effectively reduce the weight of the door-pushing bracket 700.

[0053] As Figure 4 shown in Figure (a) below, further, a buffer block 520 is arranged on the inner surface of the door body 500 of this embodiment. Multiple buffer blocks 520 can be arranged. When the door body 500 is closing, the buffer block 520 contacts the edge of the library entrance 100, avoiding direct collision between the door body 500 and the door frame of the library entrance 100 when closing the door, and playing a protective role.

[0054] As Figure 4 、 Figure 5 shown in the figure, in the specific structure of this embodiment, during the process of the door body 500 moving from closed to open, the guide rail 400 is pushed from the back to the front, so that the movement process of the guide roller 620 in the inclined section 420 is to first move downward to the lowest point of the roller, then move from the lowest point of the roller to the arc section 425 where the inclined section 420 is connected to the horizontal section 430, and finally transition from the arc section 425 to the horizontal section 430. The specific dimensions at each node position are as follows:

[0055] As Figure 4 shown in Figure (b) below, when the guide roller 620 is at the lowest point, the rotation center of the guide roller 620 is directly below the hinge axis. At this time, the dimension in the up and down direction between the rotation center of the guide roller 620 and the hinge axis is 119.67 mm, and the oblique angle between the switch reference plane of the door body 500 and the inclined section 420 of the guide groove 410 is 4°. The actuation is respectively pushed forward from the back by the guide rail 400, and the guide roller 620 slides downward in the inclined section 420, and the door body 500 rotates outward around the hinge center. The guide roller 620 of this embodiment uses a roller with a diameter of 19 mm, and the width of the guide groove 410 is 19.5 mm; when the guide roller 620 is pushed to the lowest point, the forward movement dimension of the guide rail 400 is about 67.6 mm.

[0056] As Figure 5As shown in Figure (c), continue to move the guide rail 400 so that the guide roller 620 slides along the inclined section 420 to the arc section 425 at the lowest point. The radius of the midline of the arc section 425 is 31.6 mm. At the starting point of the arc section 425, the dimension of the rotation center of the guide roller 620 to the hinge axis in the front-back direction is 75.3 mm, and the dimension of the rotation center of the guide roller 620 to the hinge axis in the up-down direction is 59.1 mm. At this time, the switch reference plane forms an angle of 79° with the vertical direction. The pushing-out dimension of the guide rail 400 (relative to the position when the door body 500 is in the closed state) is 126.3 mm. At the end point of the arc section 425, the door body 500 is in the 90° open state, which is equivalent to the switch reference plane being in the horizontal state. The dimension of the rotation center of the guide roller 620 to the hinge axis in the front-back direction is 87.2 mm, and the dimension of the rotation center of the guide roller 620 to the hinge axis in the up-down direction is 39.5 mm. The pushing-out dimension of the guide rail 400 (relative to the position when the door body 500 is in the closed state) is 167.3 mm.

[0057] As shown in Figure 5 Figure (d), continue to move the guide rail 400 so that the guide roller 620 moves within the horizontal section 430, so as to keep the door body 500 in a horizontal state continuously. In this way, the pushing-out dimension of the guide rail 400 does not affect the opening and closing of the door body 500, and the movement process of the tool transmission structure 200 is not restricted.

[0058] Embodiment 2

[0059] As shown in Figure 1 and Figure 2 shown, this embodiment proposes a chain-type tool magazine, including: a magazine entrance 100, a tool transmission structure 200, and the switch door device for the tool magazine as described above; the tool transmission structure 200 enters and exits the tool magazine through the magazine entrance 100. The guide rail 400 is fixedly connected to the top of the tool transmission structure 200 through a door-pushing bracket 700. When tool change is required, during the process of the tool transmission structure 200 being pushed out of the magazine entrance 100, the tool transmission structure 200 drives the guide rail 400 to move, so that the door body 500 can be pushed to flip through the sliding member 600 in its guide groove 410. After flipping to the maximum stroke, the magazine entrance 100 is completely opened, and the tool transmission structure 200 can continue to move outward, thus breaking through the stroke limit of the tool transmission structure 200.

[0060] As shown in Figure 1 and Figure 2As shown, further, the tool transfer structure 200 is connected to an in-out power assembly 300, and the tool transfer structure 200 enters and exits the magazine door opening 100 under the drive of the in-out power assembly 300. The in-out power assembly 300 is located inside the tool magazine, and it can adopt a ball screw linear module, so that the tool transfer structure 200 can be pushed into the magazine door opening 100 for tool change. Therefore, the in-out power assembly 300 also provides power for the movement of the guide rail 400.

[0061] To make the guide rail 400 push the door body 500 more smoothly during the movement, during the door opening process: the in-out power assembly 300 first drives the tool transfer structure 200 and the guide rail 400 to move outward synchronously at a first speed, and then drives the tool transfer structure 200 and the guide rail 400 to move outward synchronously at a second speed, and the first speed is less than the second speed. By moving at a smaller first speed first during the pushing process, the first speed can move a first stroke, where the first stroke is: when the guiding roller 620 moves downward from the position in the closed state of the door body 500 to the lowest point, the horizontal movement distance of the guide rail 400. After the first stroke is completed, the guide rail 400 continues to move forward with the tool transfer structure 200, and the guiding roller 620 starts to slide upward along the inclined section 420 step by step. At this time, it starts to move at a larger second speed. By decelerating the pushing of the guide rail 400, the impact generated by the buffering collision of the guiding roller 620 in the guide groove 410 can be reduced, and it can be quickly pushed out during the movement of the remaining second stroke after the first stroke, making the sliding process of the guiding roller 620 smoother. In the specific process, the diameter of the wheel axle 630 in this embodiment is D1, and the diameter of the guiding roller 620 is D2. Thus, when the guiding roller 620 moves to the lowest point, the horizontal movement distance of the guide rail is L3, where:

[0062]

[0063] Where is the length of the connecting line between the hinge axis and the rotation center of the guiding roller 620, a is the above-mentioned first acute angle, and b is the above-mentioned deflection angle.

[0064] The set first speed V1 is positively correlated with the diameter D1 of the wheel axle 630, that is, the larger the diameter of the wheel axle 630, the larger the first speed V1. Specifically, the first speed V1: Among them, D0 is the initial limit diameter of the axle, which can usually be set to 8 mm; K is a constant, which can usually be set to 10 - 12; V2 is the second speed. For example, in this embodiment, the second speed V2 = 30 m / minute, the diameter D1 of the axle is 10 mm, and K = 12, then the first speed is 5 m / minute. This speed and distance are the optimal control speeds obtained after multiple experimental verifications. Without causing obvious impact on the axle 630, the moving speed of the guide rail can be taken into account, so that the tool magazine can still maintain a fast movement during the process of entering and exiting.

[0065] During the closing process, the in-out power assembly 300 first drives the tool transmission structure 200 and the guide rail 400 to move outward synchronously at the third speed, and then drives the tool transmission structure 200 and the guide rail 400 to move outward synchronously at the fourth speed. The third speed is greater than the fourth speed. During the closing process, the opposite process is set in the same way. First, a larger third speed is used to quickly move the second stroke backward for retraction. Then, after reaching the starting position of the first stroke, the speed is reduced to the fourth speed, and the first stroke is slowly passed through at the fourth speed to achieve decelerated retraction, avoiding the collision impact on the tool magazine opening during the closing process. Among them, the third speed can be equal to the second speed, and the fourth speed can be equal to the first speed.

[0066] Embodiment III

[0067] This application also proposes a machine tool, which includes the chain-type tool magazine as described above.

[0068] The above are only the preferred embodiments of this application, and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A door opening and closing device for a tool magazine, used to be arranged on a tool transmission structure and a magazine door, characterized in that: The door opening and closing device includes: a guide rail, the guide rail is arranged on the tool transmission structure, a guide groove is arranged on the guide rail, and the guide groove has an inclined section and a horizontal section; A door body, one side edge of the door body is hinged on the library door opening, and a switching reference plane is formed on the hinge axis, wherein the switching reference plane is parallel to the inner surface of the door body and passes through the hinge axis; A sliding member, the sliding member is arranged on the side of the door body facing the library door opening and is movably embedded in the guide groove, and the sliding member deviates from the switching reference plane; The guide rail is driven by the movement of the tool transmission structure in the in-out direction, so that the sliding member moves within the inclined section and the horizontal section; When the sliding member moves from the inclined section to the horizontal section, the sliding member pushes the door body to rotate outward around the hinge to open the library door opening; When the sliding member moves from the horizontal section to the inclined section, the sliding member pushes the door body to rotate inward around the hinge to close the library door opening.

2. The door opening and closing device for a tool magazine according to claim 1, characterized in that: The sliding member includes: a pulley seat, and the pulley seat is fixedly arranged on the inner surface of the door body; A guiding roller, and the guiding roller is rotatably arranged on the pulley seat.

3. The door opening and closing device for a tool magazine according to claim 2, characterized in that: A first acute angle a is formed between the inclined section and the horizontal section, a connecting line between the hinge axis and the rotation center of the guiding roller forms an eccentric line, and a deflection angle b is formed between the eccentric line and the switching reference plane, wherein 2.5b < a and a < 3b.

4. The door opening and closing device for a tool magazine according to claim 3, characterized in that: When the door body closes the library door opening, the center line of the chute of the horizontal section is located between the hinge axis and the guiding roller; The distance between the center line of the chute of the horizontal section and the hinge axis is a first distance L1, and the distance between the center line of the chute of the horizontal section and the axis of the guiding roller is a second distance L2, wherein L1: L2 = 0.75 - 0.

9.

5. The door opening and closing device for a tool magazine according to claim 1, characterized in that: The guide rail forms an upper side edge and a lower side edge through the guide groove, and the thickness of the upper side edge is less than that of the lower side baffle.

6. The door opening and closing device for a tool magazine according to claim 1, characterized in that: The guide rail is arranged on the tool transmission structure through a door pushing bracket; The door pushing bracket includes: a bottom plate, a support plate and a bearing plate, and the bottom plate, the support plate and the bearing plate are in a Z-shaped structure; A waist-shaped hole is formed in the bottom plate, and the bottom plate is connected to the tool transmission structure by passing a screw through the waist-shaped hole; The guide rail is fixed on the bearing plate.

7. The door opening and closing device for a tool magazine according to claim 6, characterized in that: A buffer block is arranged on the inner surface of the door body.

8. A chain tool magazine, characterized in that: Includes: A library door opening, a tool transmission structure and a door opening and closing device for a tool magazine according to any one of claims 1-7; The tool transmission structure enters and exits the tool magazine through the library door opening.

9. The chain tool magazine according to claim 8, characterized in that: The tool transmission structure is connected with an in-out power assembly, and the tool transmission structure enters and exits the library door opening through the drive of the in-out power assembly; During the door opening process: the in-and-out power assembly first drives the tool transmission structure and the guide rail to move outward synchronously at a first speed, and then drives the tool transmission structure and the guide rail to move outward synchronously at a second speed, wherein the first speed is less than the second speed, and the first speed V1 is positively correlated with the diameter D1 of the wheel axle. Where D0 is the initial limit diameter of the axle, K is a constant, and V2 is the second speed; During the door closing process, the in-out power assembly first drives the tool transmission structure and the guide rail to move outward synchronously at a third speed, and then drives the tool transmission structure and the guide rail to move outward synchronously at a fourth speed, and the third speed is greater than the fourth speed.

10. A machine tool, characterized in that: Includes a chain-type tool magazine according to claim 9.

Images