A chain-type combined tool magazine and tool changing method thereof

Abstract

The present invention relates to the technical field of chain-type combined tool magazines, and in particular to a chain-type combined tool magazine and a tool changing method thereof, comprising: a translation mechanism that supports and drives a tool changing arm mechanism to reciprocate for tool changing, and a plurality of chain tool magazines arranged on a sliding track where the translation mechanism is located; the plurality of chain tool magazines are arranged in a row in a direction away from a main axis, and are arranged on the same side of the translation mechanism along the sliding direction as the main axis; the axes of a plurality of tools in the chain tool magazine are located in the same plane, and empty tool positions are reserved on the chain of the chain tool magazine; the translation mechanism drives the tool changing arm mechanism to pass through the empty tool positions on the plurality of chain tool magazines in sequence to take tools from the selected chain tool magazine. In the present invention, the axes of the tools in the chain tool magazine are placed in the same plane, which reduces the tool changing space required between adjacent tool magazines, reduces the equipment footprint, and the empty tool positions reduce the number and distance of movement of the tool changing arm during the tool changing process, simplifies the tool changing path, and improves the tool changing speed.

Description

Technical Field

[0001] The invention relates to the technical field of chain-type combined tool magazines, and in particular to a continuous chain-type combined tool magazine and a tool changing method thereof. Background Art

[0002] The traditional chain tool magazine is generally composed of a motor, a sprocket, a chain, a tool clamp and a tool. Its specific operation is that the motor drives the sprocket to rotate, the wheel drives the chain to rotate, the chain drives the tool clamp to rotate, and the tool clamp drives the tool to rotate to realize the rotation and transmission of tools of different specifications, so that the tool magazine can supply and change tools to the machining spindle.

[0003] However, since the tools in the tool magazine are perpendicular to the chain rotation plane, when the equipment needs to install multiple tool magazines, sufficient tool changing space needs to be reserved between two adjacent tool magazines, resulting in a large footprint for the entire equipment. During the tool changing process, the tools in the tool magazine need to be transferred to the tool changing arm mechanism with the help of a setter mechanism, which seriously affects the tool changing speed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a continuous chain type combined tool magazine and a tool changing method thereof, so as to effectively solve the problems in the background technology.

[0005] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a continuous chain-type combined tool magazine, comprising: a translation mechanism that supports and drives a tool-changing arm mechanism to reciprocate for tool-changing, and a plurality of chain-type tool magazines arranged on a sliding track where the translation mechanism is located;

[0006] The plurality of chain tool magazines are arranged in a row in a direction away from the main shaft, and are arranged on the same side of the translation mechanism along the sliding direction of the main shaft;

[0007] The axes of the plurality of tools distributed along the circumferential direction of the chain tool magazine are located in the same plane, and empty tool positions are reserved on the chain of the chain tool magazine;

[0008] The translation mechanism drives the tool changing arm mechanism to sequentially pass through the empty tool positions on the plurality of chain tool magazines, and takes tools from the selected chain tool magazine, thereby realizing reciprocating movement of the tool magazine and the spindle to supply tools.

[0009] Furthermore, a tool changing point is provided on the side of the chain tool magazine facing the translation mechanism, and the tool axis at the tool changing point and the tool axis on the spindle are located in the same horizontal plane and are arranged parallel to each other;

[0010] The rotation axis of the tool changing arm mechanism is located in the horizontal plane formed by the spindle and the tool.

[0011] Furthermore, it also includes a base frame, the base frame includes a fixed frame, and a mounting area and a movable knife feeding area arranged on the fixed frame;

[0012] The installation area is provided with a plurality of first installation racks, and the chain tool magazine is arranged on the first installation racks through a tool magazine bracket;

[0013] A second mounting frame is provided in the movable knife feeding area and spans across a plurality of the first mounting frames, the translation mechanism is arranged on the second mounting frame, the second mounting frame comprises two supporting columns and a beam group arranged on the two supporting columns, and the translation mechanism is arranged above the beam group;

[0014] At least one short beam is provided between the first mounting frame and the beam group.

[0015] Furthermore, the chain tool magazine comprises a tool magazine body, a driving wheel, a driven wheel, a tool sleeve chain and a first driving assembly;

[0016] The driving wheel and the driven wheel are arranged at two ends of the tool magazine body;

[0017] The tool sleeve chain is wrapped around the driving wheel and the driven wheel, and a plurality of cutting tools are radially mounted on the outer edge of the tool sleeve chain. The first driving assembly drives the driving wheel to rotate so as to cyclically transmit the plurality of cutting tools on the tool sleeve chain.

[0018] The tool sleeve chain comprises a chain and a plurality of tool sleeves arranged on the chain, and the empty tool positions are formed by unloaded chain links on the chain that are not loaded with tool sleeves.

[0019] Furthermore, the empty tool position includes at least two adjacent unloaded chain links.

[0020] Further, the translation mechanism includes a moving frame, a guide rail group arranged below the moving frame, and a second driving component for driving the moving frame to move along the guide rail group;

[0021] The guide rail group is fixedly arranged on the base frame, and the movable frame is slidably arranged through the guide rail group;

[0022] Among them, the second driving assembly includes a second driving motor, a reducer, a gear and a rack; the rack is fixed on the base frame, the second driving motor and the reducer are fixed on the moving frame, the gear is arranged on the output shaft of the reducer, and the gear is meshed with the rack.

[0023] Further, the tool-changing arm mechanism comprises a tool-changing arm body, a rotating shaft, a telescopic sleeve, a driving cylinder and a third driving assembly;

[0024] The rotating shaft is coaxially sleeved in the telescopic sleeve and is rotatably arranged via a bearing;

[0025] One end of the rotating shaft is fixed to the blade arm body, and the other end is connected to the driving shaft of the third driving assembly through a spline sleeve, and the driving cylinder is connected to an end of the telescopic sleeve away from the blade arm body;

[0026] The third driving assembly drives the rotating shaft to rotate so that the knife arm body rotates to change the knife, and the driving cylinder drives the telescopic sleeve to drive the rotating shaft to slide synchronously along the axis.

[0027] Furthermore, a detection frame is provided between two adjacent chain tool magazines;

[0028] The detection frame includes an intermediate support plate, and a tool change point detection end and an empty tool position detection end formed by bending and extending along the two end edges of the intermediate support plate, a proximity sensor is installed at the position of the tool change point detection end, and two distance sensors are installed at the position of the empty tool position detection end;

[0029] Wherein, the two distance sensors are arranged along the chain transmission direction and are located in the same vertical plane, and the proximity sensor is on the symmetrical midline of the two distance sensors;

[0030] Two sensing blocks corresponding to the two distance sensors are arranged on the empty tool position, and an inclined sensing surface is arranged on one side of the sensing block facing the distance sensor. The inclined sensing surfaces on the two sensing blocks gradually spread outwards toward the direction approaching the distance sensor.

[0031] Furthermore, a calibration drive assembly is provided below the detection frame, and the calibration drive assembly includes a first drive member and a second drive member that support and drive the detection frame to move in the horizontal direction and the vertical direction;

[0032] The first driving member is connected to the intermediate support plate to drive the detection frame to move along the axis of the tool located at the tool change point toward the translation mechanism;

[0033] The second driving member is disposed below the first driving member and is used to drive the first driving member to drive the detection frame to move in a vertical direction;

[0034] Among them, a raised arc surface is provided on one side of the tool arm body of the tool changing arm mechanism along the length direction. During calibration, the detection frame and the tool arm body are horizontally moved to the tool clamping plane position of the tool arm body, and the tool arm body is rotated to a vertical state. The two distance sensors sense the distance of the raised arc surface to calibrate the height of the detection frame.

[0035] The present invention also provides a tool changing method for a continuous chain type combined tool magazine, comprising the following steps:

[0036] When the spindle needs to change the tool, the system first determines the chain tool magazine where the tool to be replaced is located;

[0037] The selected tool is rotated to the tool change point by the chain, while the tool change points of other tool magazines between the selected tool magazine and the spindle are switched to empty tool positions;

[0038] Start the translation mechanism to drive the tool changing arm mechanism to move along the sliding track, passing through the empty tool positions in sequence until it reaches the tool changing position of the selected tool magazine;

[0039] After reaching the selected tool magazine position, the tool changing arm mechanism realizes tool locking, tool pulling and tool feeding through movement and extension, and transfers the selected tool to the spindle for tool changing.

[0040] The beneficial effects of the present invention are as follows: in the present invention, the tool axes in the chain tool magazine are placed in the same plane, which reduces the tool changing space required between adjacent tool magazines, makes the tool magazines more compact, and reduces the equipment footprint; and by setting empty tool positions in the tool magazines, the number and distance of movement of the tool changing arm during the tool changing process are reduced, the tool changing path is simplified, and the tool changing speed is increased.

[0041] The present invention improves the tool change efficiency and reduces the equipment footprint by optimizing the tool magazine layout and tool change process and introducing the concept of empty tool positions. It also simplifies the tool change path and improves the reliability of the tool magazine system and the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a schematic diagram of the three-dimensional structure of the chain-type combined tool magazine in an embodiment of the present invention;

[0044] Figure 2 It is a right side view of the chain-type combined tool magazine in the embodiment of the present invention;

[0045] Figure 3 It is a front view of the continuous chain type combined tool magazine in the embodiment of the present invention;

[0046] Figure 4 It is a structural schematic diagram of a base frame in an embodiment of the present invention;

[0047] Figure 5 It is a schematic diagram of the structure of a chain tool magazine in an embodiment of the present invention;

[0048] Figure 6 for Figure 5 A local enlarged view of point A;

[0049] Figure 7 It is a structural schematic diagram of a tool changing arm mechanism in an embodiment of the present invention;

[0050] Figure 8 It is a structural schematic diagram of the translation mechanism in an embodiment of the present invention;

[0051] Fig. 9 Schematic diagram of the installation of the detection frame in the embodiment of the present invention;

[0052] Fig.10 Schematic diagram of the relative positions of the detection frame and the raised arc surface in an embodiment of the present invention;

[0053] Fig.11 It is a schematic diagram of the knife arm body transforming from a horizontal state to a vertical state in an embodiment of the present invention.

[0054] Figure numerals: 1, tool change arm mechanism; 11, tool arm body; 11a, raised arc surface; 12, rotating shaft; 13, telescopic sleeve; 14, driving cylinder; 15, third driving assembly; 2, translation mechanism; 21, mobile frame; 22, guide rail group; 23, second driving assembly; 3, chain tool magazine; 3a, empty tool position; 3b, tool change point; 31, tool magazine body; 32, driving wheel; 33, driven wheel; 34, tool sleeve chain; 35, first driving assembly Components; 4. Base frame; 41. Fixed frame; 42. First mounting frame; 43. Second mounting frame; 431. Support column; 432. Beam group; 433. Short beam; 44. Tool magazine bracket; 5. Detection frame; 51. Middle support plate; 52. Tool change point detection end; 53. Empty tool position detection end; 54. Proximity sensor; 55. Distance sensor; 56. Induction block; 6. Calibration drive assembly; 61. First drive member; 62. Second drive member. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0056] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0058] like Figures 1 to 3 The chain-type combined tool magazine shown comprises: a translation mechanism 2 that supports and drives a tool-changing arm mechanism 1 to reciprocate for tool-changing, and a plurality of chain-type tool magazines 3 that are arranged on the sliding track where the translation mechanism 2 is located;

[0059] A plurality of chain tool magazines 3 are arranged in a row in a direction away from the main shaft, and are arranged on the same side of the translation mechanism 2 along the sliding direction of the main shaft;

[0060] The axes of the plurality of tools distributed along the circumferential direction of the chain tool magazine 3 are located in the same plane, and an empty tool position 3a is reserved on the chain of the chain tool magazine 3;

[0061] The translation mechanism 2 drives the tool-changing arm mechanism 1 to sequentially pass through the empty tool positions 3a on the plurality of chain tool magazines 3, and takes tools from the selected chain tool magazine 3, thereby realizing the reciprocating movement of the tool magazine and the spindle to supply tools.

[0062] In the present invention, multiple chain tool magazines 3 are arranged in sequence on the same side of the spindle, and the sliding distance of the translation mechanism 2 spans the spindle and multiple chain tool magazines 3. When the spindle needs to replace the tool, the chain tool magazine 3 where the tool is located is determined, and the selected tool is rotated to the tool change point 3b following the chain, and the tool change points 3b of multiple chain tool magazines 3 located between the selected chain tool magazine 3 and the spindle are switched to empty tool positions 3a, and the translation mechanism 2 is started. The translation mechanism 2 drives the tool changing arm mechanism 1 to slide, passing through the empty tool position 3a in sequence until it moves to the tool changing position of the selected chain tool magazine 3. The tool changing arm mechanism 1 realizes the tool locking, tool pulling and tool feeding actions through extension and movement, so as to transfer the selected tool to the spindle for tool changing. In the present invention, the tool axes in the chain tool magazine 3 are placed in the same plane, which reduces the space required for tool changing between adjacent tool magazines, makes the tool magazines more compact, and reduces the equipment footprint. An empty tool position 3a is set in the tool magazine, which reduces the number and distance of movement of the tool changing arm during the tool changing process, simplifies the tool changing path, and improves the tool changing speed.

[0063] The present invention improves the tool change efficiency and reduces the equipment footprint by optimizing the tool magazine layout and tool change process and introducing the concept of empty tool position 3a, while simplifying the tool change path and improving the reliability of the tool magazine system and the convenience of maintenance.

[0064] In the preferred embodiment of the present invention, a tool changing point 3b is provided on the side of the chain tool magazine 3 facing the translation mechanism 2, and the tool axis at the tool changing point 3b and the tool axis on the spindle are located in the same horizontal plane and are arranged parallel to each other; and the rotation axis of the tool changing arm mechanism 1 is located in the horizontal plane formed by the spindle and the tool, so that the tool changing arm does not need to perform additional up and down movement or adjustment when performing the tool changing action, which simplifies the tool changing process and reduces the complexity of the mechanical action.

[0065] In the present invention, multiple chain tool magazines 3 need to be positioned and installed one by one during the installation process. Due to the different installation positions of the chain tool magazines 3, affected by different positioning references, it is easy to have a situation where the tool-locking plane and the tool-changing point 3b are not consistent, which increases the installation and debugging time of the tool magazine. Therefore, in order to reduce the on-site installation and debugging time, the chain combined tool magazine also includes a base frame 4, such as Figure 4As shown, the base frame 4 includes a fixed frame 41, and an installation area and a movable tool feeding area arranged on the fixed frame 41; a plurality of first installation frames 42 are arranged in the installation area, and the chain tool magazine 3 is arranged on the first installation frame 42 through a tool magazine bracket; a second installation frame 43 spanning across the plurality of first installation frames 42 is arranged in the movable tool feeding area, and the translation mechanism 2 is arranged on the second installation frame 43, the second installation frame 43 includes two support columns 431, and a beam group 432 arranged on the two support columns 431, and the translation mechanism 2 is arranged above the beam group 432; and at least one short beam 433 is arranged between the first installation frame 42 and the beam group 432. The design of the base frame 4 makes the installation of the tool magazine more standardized and modular, facilitates quick installation and adjustment, and reduces the time for on-site installation and debugging.

[0066] In a preferred embodiment, Figure 5-6 As shown, the chain tool magazine 3 includes a tool magazine body 31, a driving wheel 32, a driven wheel 33, a tool sleeve chain 34 and a first driving assembly 35; the driving wheel 32 and the driven wheel 33 are arranged at both ends of the tool magazine body 31; the tool sleeve chain 34 is wrapped around the driving wheel 32 and the driven wheel 33, and a plurality of tools are radially mounted on the outer edge of the tool sleeve chain 34. The first driving assembly 35 drives the driving wheel 32 to rotate so as to cyclically transmit the plurality of tools on the tool sleeve chain 34;

[0067] The tool sleeve chain 34 includes a chain and a plurality of tool sleeves arranged on the chain, and an empty chain link on the chain without a tool sleeve formed an empty tool position 3a. The empty tool position 3a is formed by adjacent empty chain links, and the existence of the empty tool position 3a makes the tool change path more direct and simple, and the tool change arm can move directly from one empty tool position 3a to another empty tool position 3a without bypassing the tool sleeve with the tool, which can reduce the moving path of the tool change arm and improve the fluency of tool change.

[0068] In order to ensure that the width of the empty tool position 3a is sufficient for the tool change arm to pass through, and considering the possible swing or tilt of the tool change arm during movement, an appropriate safety gap is reserved, and the empty tool position 3a includes at least two adjacent unloaded chain links. When the number of unloaded chain links is even, the rotation of the tool magazine is dynamically adjusted so that the symmetric center line of the unloaded chain link is aligned with the tool change arm, and when the number of unloaded chain links is odd, the center unloaded chain link is rotated to align with the tool change arm, thereby reducing the moving distance of the tool change arm. When designing the empty tool position 3a, the number of empty tool positions 3a is minimized to improve the storage efficiency of the tool magazine while ensuring the smooth passage of the tool change arm.

[0069] In a preferred embodiment of the present invention, Figure 8As shown, the translation mechanism 2 includes a moving frame 21, a guide rail group 22 arranged below the moving frame 21, and a second driving component 23 for driving the moving frame 21 to move along the guide rail group 22; the guide rail group 22 is fixedly set on the base frame 4, and the moving frame 21 is slidably set through the guide rail group 22; the second driving component 23 includes a second driving motor, a reducer, a gear and a rack; the rack is fixed on the base frame 4, the second driving motor and the reducer are fixed on the moving frame 21, the gear is set on the output shaft of the reducer, and the gear is meshed with the rack.

[0070] Specifically, the modular design of the gears, racks and guide rail group 22 makes the entire translation mechanism 2 more compact and suitable for application scenarios with limited space. The guide rail group 22 is fixed on the base frame 4, and the mobile frame 21 slides on the base frame 4 through the guide rail group 22. This design provides a high-rigidity structure, which helps to reduce jitter and deviation during the tool changing process. The meshing of racks and gears can provide precise movement control to ensure the precise positioning of the tool changing arm during the tool changing process.

[0071] like Figure 7 As shown, the tool changing arm mechanism 1 in the present invention comprises a tool arm body 11, a rotating shaft 12, a telescopic sleeve 13, a driving cylinder 14 and a third driving assembly 15; the rotating shaft 12 is coaxially sleeved in the telescopic sleeve 13 and is rotatably arranged through a bearing, and the telescopic sleeve 13 is arranged on the translation mechanism 2 through a base; one end of the rotating shaft 12 is fixed to the tool arm body 11, and the other end is connected to the driving shaft of the third driving assembly 15 through a spline sleeve, and the driving cylinder 14 is connected to one end of the telescopic sleeve 13 away from the tool arm body 11; the third driving assembly 15 drives the rotating shaft 12 to rotate so that the tool arm body 11 rotates to change the tool, and the driving cylinder 14 drives the telescopic sleeve 13 to drive the rotating shaft 12 to slide synchronously along the axis.

[0072] The driving cylinder 14 drives the telescopic sleeve 13 to slide in the base, and the rotating shaft 12 slides synchronously with the telescopic sleeve 13. When the knife arm body 11 moves to the knife locking plane, the third driving component 15 drives the rotating shaft 12 to rotate relative to the telescopic sleeve 13, so that the knife arm body 11 can realize the rotating tool changing action, and the third driving component 15 adopts the combination of a driving motor and a reducer.

[0073] When the tool changing arm mechanism 1 in the present invention takes a tool from any chain tool magazine 3, its moving path is always at the same height. However, due to installation errors in the chain tool magazine 3 during installation, it is difficult to ensure that the tool changing points 3b of each chain tool magazine 3 are located at the same horizontal plane, which leads to the risk of tool collision in the tool changing arm during the moving tool changing process. Therefore, in order to ensure the reliability of tool taking, Figure 3 and Fig. 9As shown, a detection frame 5 is provided between two adjacent chain tool magazines 3; the detection frame 5 includes an intermediate support plate 51, and a tool change point 3b detection end and an empty tool position 3a detection end formed by bending and extending along the two end edges of the intermediate support plate 51, a proximity sensor 54 is installed at the tool change point 3b detection end, and two distance sensors 55 are installed at the empty tool position 3a detection end;

[0074] Among them, the two distance sensors 55 are arranged along the chain transmission direction and are located in the same vertical plane, and the proximity sensor 54 is on the symmetrical midline of the two distance sensors 55; and two sensing blocks 56 corresponding to the two distance sensors 55 are provided on the empty tool position 3a, and an inclined sensing surface is provided on the side of the sensing block 56 facing the distance sensor 55, and the inclined sensing surfaces on the two sensing blocks 56 gradually spread outward toward the direction close to the distance sensor 55.

[0075] The specific detection process is that the selected tool magazine rotates and selects the tool according to the tool selection instruction. When the tool to be selected in the selected tool magazine gradually approaches the tool change point 3b and is detected by the proximity sensor 54, the chain of the selected tool magazine stops rotating; at the same time, the chains in the multiple chain tool magazines 3 located between the selected tool magazine and the spindle rotate synchronously, and the two sensing blocks 56 are set at the end positions of the empty tool positions 3a, and the sensing surfaces are set inclined. When the center of the empty tool position 3a moves to the position close to the tool change point 3b, the distance sensor 55 located above senses the sensing block 56 at the upper end and obtains the first distance, while the distance sensor 55 located below senses the sensing block 56 at the lower end and obtains the second distance. Distance, compare the first distance and the second distance, and according to the trigonometric function theorem, further obtain the deviation value between the symmetry center of the two sensing blocks 56 and the tool change point 3b, and compare the deviation value with the set threshold value. When the deviation value is less than or equal to the set threshold value, the chain tool magazine 3 does not need to be adjusted. When the deviation value is greater than the set threshold value, the chain tool magazine 3 is fine-tuned by rotating the chain again to make the unloaded chain links of the empty tool position 3a symmetrically arranged relative to the tool change point 3b, so that the tool change arm has the same reserved gap between the adjacent tool sleeves at both ends when passing through the empty tool position 3a, ensuring that it passes through the center of the empty tool position 3a to avoid interference during the movement of the tool change arm.

[0076] In the present invention, the detection frame 5 is used to locate the empty tool position 3a to ensure that the tool changing arm can pass smoothly. However, due to the slight difference in the installation height of the detection frame 5, when the empty tool position 3a is located by using two distance sensors 55, the multiple empty tool positions 3a formed will have height differences in the vertical direction. The height difference of the empty tool positions 3a will cause the avoidance channel formed by the splicing to be tortuous instead of a straight line, which increases the risk of the tool changing arm colliding with the tool or other components during the movement. Therefore, in order to ensure the height consistency of multiple detection frames 5, as shown in FIG. Fig.10As shown, a calibration drive assembly 6 is provided below the detection frame 5, and the calibration drive assembly 6 includes a first drive member 61 and a second drive member 62 that support and drive the detection frame 5 to move in the horizontal direction and the vertical direction; the first drive member 61 is connected to the middle support plate 51 to drive the detection frame 5 to move along the axis of the tool located at the tool change point 3b toward the translation mechanism 2; the second drive member 62 is provided below the first drive member 61, and is used to drive the first drive member 61 to drive the detection frame 5 to move in the vertical direction;

[0077] Among them, a raised arc surface 11a is provided on one side of the tool arm body 11 along the length direction of the tool changing arm mechanism 1. During calibration, the detection frame 5 and the tool arm body 11 are horizontally moved to the tool clamping plane position of the tool arm body 11, and the tool arm body 11 is rotated to a vertical state. The two distance sensors 55 sense the distance of the raised arc surface 11a to calibrate the height of the detection frame 5.

[0078] The tool changing arm mechanism 1 moves in a direction away from the spindle, and calibrates the detection frame 5 in turn. In the process of calibrating the detection frame 5 corresponding to the first chain tool magazine 3, the tool changing arm mechanism 1 is moved to the first chain tool magazine 3 on one side of the spindle, and the detection frame 5 is located on the other side of the first chain tool magazine 3. When the tool arm body 11 of the tool changing arm mechanism 1 moves toward the tool buckling plane, the first driving member 61 synchronously drives the detection frame 5 to move until the two distance sensors 55 and the convex arc surface 11a of the tool arm body 11 are located in the same vertical plane. At this time, Fig.11 As shown, the knife arm body 11 is rotated to a vertical state, and the two distance sensors 55 detect the distance to the raised arc surface 11a, and the moving distance of the second driving member 62 in the vertical direction is controlled according to the distance difference. After the adjustment of the first detection frame 5 is completed, the tool change arm mechanism 1 is moved to the second chain tool magazine 3 on one side of the main shaft, and the above steps are repeated to complete the height adjustment of multiple detection frames 5. The present invention utilizes the knife arm body 11 to detect the same by using a high-precision distance sensor 55, and calibrates before the system is started, adjusts the height of the detection frame 5, ensures that the installation height of the detection frame 5 is consistent, and reduces or eliminates the height difference.

[0079] The present invention also provides a tool changing method for a continuous chain type combined tool magazine, comprising the following steps:

[0080] When the spindle needs to replace the tool, the system first determines the chain tool magazine 3 where the tool to be replaced is located;

[0081] The selected tool is rotated to the tool change point 3b by the chain, while the tool change point 3b of other tool magazines between the selected tool magazine and the spindle is switched to an empty tool position 3a;

[0082] The translation mechanism 2 is started to drive the tool changing arm mechanism 1 to move along the sliding track, passing through the empty tool positions 3a in sequence, until reaching the tool changing position of the selected tool magazine;

[0083] After reaching the selected tool magazine position, the tool changing arm mechanism 1 realizes tool locking, tool pulling and tool feeding through movement and telescopic action, and transfers the selected tool to the spindle for tool changing.

[0084] By setting an empty tool position 3a and optimizing the tool change path, this invention simplifies the tool change process, increases the tool change speed, and thus improves the overall production efficiency.

[0085] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining 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, and these changes and improvements 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 chain-type combined tool magazine, characterized in that: include: A translation mechanism that supports and drives the tool-changing arm mechanism to reciprocate for tool-changing, and a plurality of chain tool magazines arranged on the sliding track where the translation mechanism is located; The plurality of chain tool magazines are arranged in a row in a direction away from the main shaft, and are arranged on the same side of the translation mechanism along the sliding direction of the main shaft; The axes of the plurality of tools distributed along the circumferential direction of the chain tool magazine are located in the same plane, and empty tool positions are reserved on the chain of the chain tool magazine; The translation mechanism drives the tool changing arm mechanism to sequentially pass through the empty tool positions on the plurality of chain tool magazines, and takes tools from the selected chain tool magazine, thereby realizing reciprocating movement of the tool magazine and the spindle to supply tools; A detection frame is provided between two adjacent chain tool magazines; the detection frame comprises an intermediate support plate, and a tool change point detection end and an empty tool position detection end formed by bending and extending along the two end edges of the intermediate support plate, a proximity sensor is installed at the position of the tool change point detection end, and two distance sensors are installed at the position of the empty tool position detection end; Wherein, the two distance sensors are arranged along the chain transmission direction and are located in the same vertical plane, and the proximity sensor is on the symmetrical midline of the two distance sensors; Two sensing blocks corresponding to the two distance sensors are arranged on the empty tool position, and an inclined sensing surface is arranged on one side of the sensing block facing the distance sensor, and the inclined sensing surfaces on the two sensing blocks gradually spread outwards toward the direction close to the distance sensor; A calibration drive assembly is provided below the detection frame, including a first drive member and a second drive member for supporting and driving the detection frame to move in the horizontal direction and the vertical direction; A raised arc surface is provided on one side of the tool arm body of the tool changing arm mechanism along the length direction. During calibration, the detection frame and the tool arm body are horizontally moved to the tool clamping plane position of the tool arm body, and the tool arm body is rotated to a vertical state. The two distance sensors sense the distance of the raised arc surface to calibrate the height of the detection frame.

2. The tandem chain-type combined tool magazine according to claim 1, characterized in that: The chain tool magazine is provided with a tool changing point on the side facing the translation mechanism, and the tool axis at the tool changing point and the tool axis on the spindle are located in the same horizontal plane and are arranged parallel to each other; The rotation axis of the tool changing arm mechanism is located in the horizontal plane formed by the spindle and the tool.

3. The tandem chain-type combined tool magazine according to claim 1, characterized in that: It also includes a base frame, which includes a fixed frame, and a mounting area and a movable knife feeding area arranged on the fixed frame; The installation area is provided with a plurality of first installation racks, and the chain tool magazine is arranged on the first installation racks through a tool magazine bracket; A second mounting frame is provided in the movable knife feeding area and spans across a plurality of the first mounting frames, the translation mechanism is arranged on the second mounting frame, the second mounting frame comprises two supporting columns and a beam group arranged on the two supporting columns, and the translation mechanism is arranged above the beam group; At least one short beam is provided between the first mounting frame and the beam group.

4. The tandem chain-type combined tool magazine according to claim 1, characterized in that: The chain tool magazine comprises a tool magazine body, a driving wheel, a driven wheel, a tool sleeve chain and a first driving assembly; The driving wheel and the driven wheel are arranged at two ends of the tool magazine body; The tool sleeve chain is wrapped around the driving wheel and the driven wheel, and a plurality of cutting tools are radially mounted on the outer edge of the tool sleeve chain. The first driving assembly drives the driving wheel to rotate so as to cyclically transmit the plurality of cutting tools on the tool sleeve chain. The tool sleeve chain comprises a chain and a plurality of tool sleeves arranged on the chain, and the empty tool positions are formed by unloaded chain links on the chain that are not loaded with tool sleeves.

5. The tandem chain-type combined tool magazine according to claim 4, characterized in that: The empty tool position includes at least two adjacent unloaded chain links.

6. The tandem chain-type combined tool magazine according to claim 3, characterized in that: The translation mechanism includes a moving frame, a guide rail group arranged below the moving frame, and a second driving component for driving the moving frame to move along the guide rail group; The guide rail group is fixedly arranged on the base frame, and the movable frame is slidably arranged through the guide rail group; Among them, the second driving assembly includes a second driving motor, a reducer, a gear and a rack; the rack is fixed on the base frame, the second driving motor and the reducer are fixed on the moving frame, the gear is arranged on the output shaft of the reducer, and the gear is meshed with the rack.

7. The tandem chain-type combined tool magazine according to claim 1, characterized in that: The tool changing arm mechanism comprises a tool arm body, a rotating shaft, a telescopic sleeve, a driving cylinder and a third driving assembly; The rotating shaft is coaxially sleeved in the telescopic sleeve and is rotatably arranged via a bearing; One end of the rotating shaft is fixed to the blade arm body, and the other end is connected to the driving shaft of the third driving assembly through a spline sleeve, and the driving cylinder is connected to an end of the telescopic sleeve away from the blade arm body; The third driving assembly drives the rotating shaft to rotate so that the knife arm body rotates to change the knife, and the driving cylinder drives the telescopic sleeve to drive the rotating shaft to slide synchronously along the axis.

8. A tool changing method for a tandem chain-type combined tool magazine as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: When the spindle needs to change the tool, the system first determines the chain tool magazine where the tool to be replaced is located; The selected tool is rotated to the tool change point by the chain, while the tool change points of other tool magazines between the selected tool magazine and the spindle are switched to empty tool positions; Start the translation mechanism to drive the tool changing arm mechanism to move along the sliding track, passing through the empty tool positions in sequence until it reaches the tool changing position of the selected tool magazine; After reaching the selected tool magazine position, the tool changing arm mechanism realizes tool locking, tool pulling and tool feeding through movement and extension, and transfers the selected tool to the spindle for tool changing.

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