Automatic tool changing system of numerical control machine tool

Abstract

The invention discloses a numerical control machine tool automatic tool changing system and relates to the technical field of machine tool tool changing. The rotating shaft penetrates through and is fixed in the blade storage rack; the upper and lower ends of the rotating shaft are respectively screwed on the transverse plates on the upper and lower sides of the fixed rack through bearings; the equal-angle rotating mechanism is arranged in a transverse plate on the lower side of the fixing frame and connected with the lower end of the rotating shaft. The supporting column is fixed to a transverse plate on the lower side of the fixing frame, and the upper side of the supporting column is movably inserted into a cylindrical groove in the lower side of the blade storage frame. The limiting mechanism is arranged on the supporting column, the limiting mechanism is located in the blade storage rack, and the limiting mechanism is matched with storage grooves formed in the blade storage rack at equal angles; the pushing mechanism is arranged on the fixing plate and connected with the vertical plate of the fixing frame. When the blade is replaced, the blade storage assembly can be directly moved to one side of the tool apron and then directly replaced, the intermediate replacement time is saved, and the tool replacement efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool tool changing, and in particular to an automatic tool changing system for a numerically controlled machine tool. Background Art

[0002] In CNC machine tools, in order to complete multiple processing steps in one clamping of the workpiece, shorten the auxiliary time, and reduce the errors caused by multiple installations of the workpiece, an automatic tool changer must be installed. The automatic tool changer should meet the basic requirements of short tool change time, high tool repositioning accuracy, sufficient tool storage, small tool magazine footprint, and safety and reliability; in traditional tool change systems, most of the blade storage components are set on one side of the machine tool, and when changing the tool, the original blade must be sent to the tool holder through the transmission component, and then the blade to be replaced must be sent to the side of the tool holder, which is time-consuming and labor-intensive. Summary of the invention

[0003] The purpose of the present invention is to provide a CNC machine tool automatic tool changing system with a reasonable design and easy use in view of the defects and shortcomings of the prior art. The blade storage assembly can be directly moved to one side of the tool holder and then directly replaced, thus saving the time of intermediate replacement and improving the tool changing efficiency.

[0004] To achieve the above object, the present invention adopts the following technical scheme: it comprises a fixing frame, a fixing plate and a blade storage frame, the fixing frame is arranged in a "U" shape, a fixing plate is arranged on the rear side of the vertical plate of the fixing frame, the fixing plate is fixedly connected to the inner wall of the machine tool, and a blade storage frame is arranged inside the fixing frame; it also comprises:

[0005] A rotating shaft, the rotating shaft passes through and is fixed in the blade storage rack, and the upper and lower ends of the rotating shaft are respectively screwed to the horizontal plates on the upper and lower sides of the fixed rack through bearings;

[0006] An equal-angle rotation mechanism, which is arranged in the horizontal plate at the lower side of the fixed frame and is connected to the lower end of the rotation shaft;

[0007] A support column, wherein the support column is fixed to the horizontal plate at the lower side of the fixed frame, and the upper side of the support column is movably inserted into the cylindrical groove at the lower side of the blade storage frame;

[0008] A limiting mechanism, wherein the limiting mechanism is arranged on the supporting column and is located in the blade storage rack, and the limiting mechanism is arranged in cooperation with a storage slot arranged at an equal angle on the blade storage rack;

[0009] A pushing mechanism, wherein the pushing mechanism is disposed on the fixing plate and connected to the vertical plate of the fixing frame;

[0010] Through the above technical scheme, the fixed plate is connected to the machine tool, and the storage slot and the limiting mechanism on the blade storage rack are made to correspond to the blade on the tool holder. When the tool needs to be changed, the fixed rack is driven to move to one side of the tool holder through the pushing mechanism until the empty storage slot on the blade storage rack is stuck on the blade, and then the limiting mechanism is started to limit the blade through the limiting mechanism, and at the same time, the equal-angle rotation mechanism is started. The equal-angle rotation mechanism drives the blade storage rack to rotate a certain angle through the rotating shaft, so that the next storage slot with the blade installed is located on the lower side of the tool holder. After the blade is installed on the tool holder, the limiting mechanism on the storage slot is released, thereby achieving the effect of replacing the blade without the need for intermediate movement, saving time.

[0011] As a further improvement of the present invention, the equi-angle rotation mechanism comprises:

[0012] A rotating disk, the rotating disk is arranged in the horizontal plate at the lower side of the fixed frame, the rotating disk is sleeved and fixed on the lower end of the rotating shaft, and a plurality of gear rods are fixed at equal angles on the upper surface of the rotating disk, and the gear rods are arranged corresponding to the number of storage slots;

[0013] A driven rod, the driven rod is screwed into the horizontal plate at the lower side of the fixed frame through a bearing and is located on one side of the rotating disk. A toggle rod is fixed to the upper end of the driven rod. The toggle rod is located in the circular cavity of the horizontal plate at the lower side of the fixed frame. The toggle rod cooperates with the gear rod to push the arrangement;

[0014] An active rod, wherein the active rod is screwed into the vertical plate of the fixed frame through a bearing, the active rod is connected to the driven rod through a synchronous wheel transmission assembly, a rotating motor is fixed to the upper end of the active rod, the rotating motor is embedded and fixed in the vertical plate of the fixed frame, and the rotating motor is connected to an external control system;

[0015] Through the above technical solution, when changing the tool, the blade to be replaced is stuck in the corresponding storage slot, and the rotating motor is started through the external control system, so that the rotating motor drives the active rod to rotate one circle, and the active rod drives the driven rod to rotate one circle through the synchronous wheel transmission assembly, and the driven rod drives the toggle rod to rotate one circle, and the toggle rod pushes the gear rod, so that the rotating disk rotates the angle between the two adjacent gear rods, and the rotating disk drives the rotating shaft to rotate the corresponding angle.

[0016] As a further improvement of the present invention, an annular slide rail is fixed on the top wall of the support column, and the annular slide rail is slidably arranged in an annular groove on the inner bottom wall of the blade storage rack;

[0017] The above technical solution can increase the stability of the blade storage rack when it rotates.

[0018] As a further improvement of the present invention, the limiting mechanism comprises:

[0019] Arc-shaped plates, wherein there are several arc-shaped plates, and the outer arc-shaped surfaces of the arc-shaped plates are embedded in the arc-shaped grooves on the inner wall of the storage groove;

[0020] Arc-shaped slide bars, wherein there are several arc-shaped slide bars, and two of them are symmetrically fixed on the side walls of the arc-shaped plate, and the arc-shaped slide bars are slidably arranged in the arc-shaped slide grooves on the upper and lower inner walls of the arc-shaped groove;

[0021] A limit motor, wherein the limit motor is embedded and fixed in the support column, the limit motor is connected to an external control system, a driving gear is fixed on the output shaft of the limit motor, and the teeth of the driving gear pass through the side wall of the support column and are located in a circular groove on the inner bottom wall of the blade storage rack;

[0022] Teeth, there are several teeth, and they are fixed on the outer ring wall of the arc plate in equal amounts and at equal angles, and the teeth on the front arc plate are meshed with the driving gear;

[0023] Through the above technical scheme, after the blade storage rack is rotated to a suitable position and the blade on the front side of the blade storage rack is clamped onto the tool holder on the machine tool, the limit motor is started, and the limit motor drives the driving gear to rotate. After the driving gear engages with the corresponding teeth, it drives the corresponding arc plate to rotate, so that when the arc plate rotates, the blade storage rack is opened, thereby releasing the blade. When the replaced blade needs to be installed on the blade storage rack, the slot on the blade is clamped onto the arc plate, and the limit motor is started through the external control system. The limit motor drives the arc plate to rotate to the opening outside the storage slot, thereby limiting the blade.

[0024] As a further improvement of the present invention, the outer side of one side wall of the arc-shaped plate abuts against a limit plate, the limit plate is fixed to the inner wall of one side of the storage slot, and the outer side of the limit plate and the outer side of the storage rack are arranged in the same arc surface;

[0025] Through the above technical solution, the blade can be supported by the limiting plate after the arc plate rotates, thereby increasing the stability of the blade after installation.

[0026] As a further improvement of the present invention, a push spring is fixed on the inner wall of the arc-shaped plate, and the other end of the push spring is fixed on the inner wall of the blade storage rack;

[0027] Through the above technical solution, the arc plate can be pushed by the push spring to prevent the arc plate from rotating into the blade storage rack during storage, thereby preventing the blade from falling.

[0028] As a further improvement of the present invention, the pushing mechanism comprises:

[0029] Pushing connecting rods, there are several pushing connecting rods, and two of them are set in a group and are symmetrically arranged on the upper and lower sides of the rear side of the fixing frame after being screwed together through the shaft rod. The other ends of the two pushing connecting rods in the same group are respectively screwed to the vertical plate and the fixing plate of the fixing frame through the hinge seat;

[0030] Connecting rods, there are two connecting rods, which are symmetrically connected to the fixed plate through bearings, and the two ends of the connecting rods are respectively fixed to the push connecting rods connected to the fixed plate;

[0031] A driving rod, the driving rod is embedded in the fixed plate and screwed in through a bearing, the two ends of the driving rod are respectively connected to the connecting rods on both sides through a worm gear pair, and a driving motor is fixed on one end of the driving rod, and the driving motor is embedded in and fixed in the fixed plate;

[0032] Through the above technical solution, the pushing motor is started, the pushing motor drives the driving rod to rotate, the driving rod drives the connecting rods on both sides to rotate through the worm gear pair, the connecting rod drives the pushing connecting rods at both ends to rotate, and the pushing connecting rod drives the pushing connecting rod connected to it to rotate, so that the pushing connecting rod connected to the fixed frame drives the fixed frame to move until the fixed frame moves to a suitable position.

[0033] As a further improvement of the present invention, a telescopic connecting rod is symmetrically arranged between the fixing plate and the fixing frame, and the supporting rods on the four sides of the telescopic connecting rod are all screwed with a rotating rod through a shaft rod, and the other end of the rotating rod is respectively embedded and screwed in the rear side wall of the vertical plate of the fixing frame and the front side wall of the fixing plate through the shaft rod;

[0034] Through the above technical solution, when the fixing frame moves forward and backward, the telescopic connecting rod and the rotating rod can be synchronously telescoped and extended, and the fixing frame is supported during the telescopic process.

[0035] As a further improvement of the present invention, a cleaning ring is suspended inside the fixing frame, a connecting plate is fixed on one side wall of the cleaning ring, a slider is fixed symmetrically on the other side wall of the connecting plate, the slider is slidably arranged in the vertical plate of the fixing frame, a reciprocating screw rod is screwed in one of the sliders through a thread, the upper end of the reciprocating screw rod is screwed in the vertical plate of the fixing frame through a bearing, a cleaning motor is fixed at the lower end of the reciprocating screw rod, and the cleaning motor is embedded in the bottom side of the vertical plate of the fixing frame;

[0036] Through the above technical solution, when the used blade is rotated to the cleaning ring, the cleaning motor is started, the cleaning motor drives the reciprocating screw to rotate, the reciprocating screw drives the slider thereon to move back and forth up and down through the thread, and the slider drives the cleaning ring to move up and down through the connecting plate, so that the blade is cleaned by the bristles on the inner ring wall of the cleaning ring. When not in use, the cleaning ring is driven by the reciprocating screw to move to the lowermost side inside the fixed frame, thereby not affecting the rotation of the blade.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The blade storage assembly can be directly moved to one side of the blade holder through the fixed frame, fixed plate and pushing mechanism, and then directly replaced, which saves the time of intermediate replacement and improves the efficiency of blade change;

[0039] 2. The blade storage rack is connected to the equal-angle rotating mechanism through a rotating shaft, so that when installing, the blade storage rack can be driven to rotate a fixed angle through the equal-angle rotating mechanism, ensuring that the blades are located at the lower side of the blade seat in sequence, thereby facilitating the replacement of the blades;

[0040] 3. The limiting mechanism arranged inside the blade storage rack can limit the blade in the storage slot, which increases the stability of the blade in the storage slot during storage;

[0041] 4. A cleaning ring is arranged inside the fixed frame, so that the blade inside the fixed frame can be cleaned, and the cleaning ring can be driven to move back and forth up and down by the reciprocating screw rod, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the present invention.

[0043] Figure 2 It is an exploded view of the fixing frame, the equal-angle rotating mechanism and the rotating shaft in the present invention.

[0044] Figure 3 This is an exploded view of the blade storage rack, the limiting mechanism, and the support column in the present invention.

[0045] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0046] Figure 5 It is an exploded view of the fixing frame, the fixing plate and the pushing mechanism in the present invention.

[0047] Figure 6 for Figure 5 Enlarged view of part B in the middle.

[0048] Figure 7 The figure is an exploded view of the cleaning ring, connecting plate, slider, reciprocating screw rod and cleaning motor in the present invention.

[0049] Description of reference numerals:

[0050] Fixed frame 1, fixed plate 2, blade storage frame 3, rotating shaft 4, equal-angle rotating mechanism 5, rotating disk 5-1, gear rod 5-2, driven rod 5-3, toggle rod 5-4, active rod 5-5, rotating motor 5-6, supporting column 6, limiting mechanism 7, arc plate 7-1, arc slide bar 7-2, limiting motor 7-3, driving gear 7-4, teeth 7-5, pushing mechanism 8, pushing connecting rod 8-1, connecting rod 8-2, driving rod 8-3, pushing motor 8-4, annular slide rail 9, limiting plate 10, pushing spring 11, telescopic connecting rod 12, rotating rod 13, cleaning ring 14, connecting plate 15, slider 16, reciprocating screw rod 17, cleaning motor 18. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0052] Embodiment 1:

[0053] like Figure 1-Figure 7 As shown, this embodiment comprises a fixed frame 1, a fixed plate 2 and a blade storage frame 3, wherein the fixed frame 1 is arranged in a "U" shape, a fixed plate 2 is arranged on the rear side of the vertical plate of the fixed frame 1, the fixed plate 2 is fixedly connected to the inner wall of the machine tool, and a blade storage frame 3 is arranged inside the fixed frame 1; it also comprises:

[0054] A rotating shaft 4, wherein the rotating shaft 4 penetrates through and is welded and fixed in the blade storage frame 3, and the upper and lower ends of the rotating shaft 4 are respectively screwed to the horizontal plates on the upper and lower sides of the fixing frame 1 through bearings;

[0055] The equal-angle rotation mechanism 5 is arranged in the horizontal plate at the lower side of the fixed frame 1, and the equal-angle rotation mechanism 5 is connected to the lower end of the rotating shaft 4;

[0056] A support column 6, wherein the support column 6 is fixed to the horizontal plate at the lower side of the fixed frame 1, and the upper side of the support column 6 is movably inserted into the cylindrical groove at the lower side of the blade storage rack 3; an annular slide rail 9 is welded and fixed on the top wall of the support column 6, and the annular slide rail 9 is slidably arranged in the annular groove on the inner bottom wall of the blade storage rack 3, which can increase the stability of the blade storage rack 3 when it rotates;

[0057] The limiting mechanism 7 is arranged on the supporting column 6, and the limiting mechanism 7 is located in the blade storage rack 3, and the limiting mechanism 7 is arranged in cooperation with the storage slots arranged at equal angles on the blade storage rack 3;

[0058] A pushing mechanism 8 is provided on the fixed plate 2, and the pushing mechanism 8 is connected to the vertical plate of the fixed frame 1; a telescopic link 12 is symmetrically provided between the fixed plate 2 and the fixed frame 1, and the support rods on the four sides of the telescopic link 12 are all screwed with a rotating rod 13 through an axle rod, and the other end of the rotating rod 13 is respectively embedded and screwed in the rear side wall of the vertical plate of the fixed frame 1 and the front side wall of the fixed plate 2 through the axle rod. During the forward and backward movement of the fixed frame 1, the telescopic link 12 and the rotating rod 13 can be synchronously telescoped and extended, and the fixed frame 1 is supported during the telescopic process.

[0059] Embodiment 2:

[0060] See also Figure 2 As shown, based on Example 1, the equal-angle rotation mechanism 5 comprises:

[0061] The rotating disk 5-1 is arranged in the horizontal plate at the lower side of the fixed frame 1, and the rotating disk 5-1 is sleeved and welded to the lower end of the rotating shaft 4. A plurality of gear rods 5-2 are welded and fixed at equal angles on the upper surface of the rotating disk 5-1, and the gear rods 5-2 are arranged corresponding to the number of storage slots;

[0062] A driven rod 5-3, the driven rod 5-3 is screwed into the horizontal plate at the lower side of the fixed frame 1 through a bearing, and is located on one side of the rotating disk 5-1. A toggle rod 5-4 is welded and fixed to the upper end of the driven rod 5-3. The toggle rod 5-4 is located in the circular cavity of the horizontal plate at the lower side of the fixed frame 1. The toggle rod 5-4 cooperates with the gear rod 5-2 to push the arrangement;

[0063] The active rod 5-5 is screwed into the vertical plate of the fixed frame 1 through a bearing, the active rod 5-5 is connected to the driven rod 5-3 through a synchronous wheel transmission assembly, a rotating motor 5-6 is fixed to the upper end of the active rod 5-5, the rotating motor 5-6 is embedded and fixed in the vertical plate of the fixed frame 1, and the rotating motor 5-6 is connected to an external control system.

[0064] Embodiment 3:

[0065] See also Figure 1 , Figure 3-4 As shown, based on Example 1, the limiting mechanism 7 includes:

[0066] The arc plate 7-1 is provided with several arc plates 7-1, and the outer arc surface of the arc plate 7-1 is embedded in the arc groove on the inner wall of the storage groove; the outer side of one side wall of the arc plate 7-1 abuts against the limiting plate 10, and the limiting plate 10 is fixed on the inner wall of one side of the storage groove. The outer side of the limiting plate 10 and the outer side of the blade storage rack 3 are arranged in the same arc surface, and the blade can be supported by the limiting plate 10 after the arc plate 7-1 rotates, thereby increasing the stability of the blade after installation; a push spring 11 is welded and fixed on the inner wall of the arc plate 7-1, and the other end of the push spring 11 is welded and fixed on the inner wall of the blade storage rack 3, and the arc plate 7-1 can be pushed by the push spring 11 to prevent the arc plate 7-1 from rotating into the blade storage rack 3 during the storage process, thereby preventing the blade from falling;

[0067] Arc slide bars 7-2, wherein there are several arc slide bars 7-2, and the arc slide bars 7-2 are symmetrically welded and fixed on the side walls of the arc plate 7-1 in pairs, and the arc slide bars 7-2 are slidably arranged in the arc slide grooves on the upper and lower inner walls of the arc groove;

[0068] The limit motor 7-3 is embedded and fixed in the support column 6, the limit motor 7-3 is connected to the external control system, a driving gear 7-4 is fixed on the output shaft of the limit motor 7-3, and the teeth 7-5 of the driving gear 7-4 pass through the side wall of the support column 6 and are located in the circular groove on the inner bottom wall of the blade storage rack 3;

[0069] Teeth 7-5, there are several teeth 7-5, and they are welded and fixed on the outer ring wall of the arc plate 7-1 in equal amounts and at equal angles. The teeth 7-5 on the front arc plate 7-1 are meshed with the driving gear 7-4.

[0070] Embodiment 4:

[0071] See also Figure 5-6 As shown, based on Example 1, the pushing mechanism 8 includes:

[0072] Pushing connecting rods 8-1, there are several pushing connecting rods 8-1, and two of them are set in a group through the shaft rod, and are symmetrically arranged on the upper and lower sides of the rear side of the fixing frame 1. The other ends of the two pushing connecting rods 8-1 in the same group are respectively screwed on the vertical plate of the fixing frame 1 and the fixing plate 2 through the hinge seat;

[0073] Connecting rods 8-2, there are two connecting rods 8-2, and they are symmetrically screwed into the fixing plate 2 through bearings, and the two ends of the connecting rods 8-2 are respectively welded and fixed on the pushing connecting rods 8-1 screwed on the fixing plate 2;

[0074] The driving rod 8-3 is embedded in the fixed plate 2 and screwed on the fixed plate 2 through a bearing. The two ends of the driving rod 8-3 are respectively connected to the connecting rods 8-2 on both sides through a worm gear pair. A pushing motor 8-4 is fixed on one end of the driving rod 8-3. The pushing motor 8-4 is embedded in and fixed in the fixed plate 2.

[0075] Embodiment 5:

[0076] See also Figure 1 , Figure 7 As shown, on the basis of Example 1, a cleaning ring 14 is suspended inside the fixed frame 1, a connecting plate 15 is fixed on one side wall of the cleaning ring 14, and sliders 16 are symmetrically fixed on the other side wall of the connecting plate 15, and the sliders 16 are slidably arranged in the vertical plate of the fixed frame 1, and a reciprocating screw 17 is screwed into one of the sliders 16 through a thread, and the upper end of the reciprocating screw 17 is screwed into the vertical plate of the fixed frame 1 through a bearing, and a cleaning motor 18 is fixed to the lower end of the reciprocating screw 17, and the cleaning motor 18 is embedded in the bottom side of the vertical plate of the fixed frame 1.

[0077] When using the present invention, the fixing plate 2 is connected to the machine tool, and after the blade storage rack 3 is rotated to a suitable position and the blade on the front side of the blade storage rack 3 is clamped onto the tool holder on the machine tool, the limit motor 7-3 is started, and the limit motor 7-3 drives the driving gear 7-4 to rotate. After the driving gear 7-4 is meshed with the corresponding tooth 7-5, it drives the corresponding arc plate 7-1 to rotate, so that when the arc plate 7-1 rotates, the blade storage rack 3 is moved, thereby releasing the blade. When the replaced blade needs to be installed on the blade storage rack 3, the card slot on the blade is clamped onto the arc plate 7-1, and the limit motor 7-3 is started through the external control system. The machine 7-3 drives the arc plate 7-1 to rotate to the opening outside the storage slot, thereby limiting the blade. When the blade needs to be changed, the pushing motor 8-4 is started, and the pushing motor 8-4 drives the driving rod 8-3 to rotate. The driving rod 8-3 drives the connecting rods 8-2 on both sides to rotate through the worm gear pair, and the connecting rod 8-2 drives the pushing connecting rods 8-1 at both ends to rotate. The pushing connecting rod 8-1 drives the pushing connecting rod 8-1 connected to it to rotate, so that the pushing connecting rod 8-1 connected to the fixed frame 1 drives the fixed frame 1 to move until the fixed frame 1 moves to a suitable position, and the empty storage slot on the blade storage frame 3 is stuck on the blade, and then the limiting mechanism is started. 7, the blade is limited by the limiting mechanism 7, and after the blade to be replaced is stuck in the corresponding storage slot, the rotating motor 5-6 is started through the external control system, so that the rotating motor 5-6 drives the active rod 5-5 to rotate one circle, the active rod 5-5 drives the driven rod 5-3 to rotate one circle through the synchronous wheel transmission assembly, the driven rod 5-3 drives the toggle rod 5-4 to rotate one circle, the toggle rod 5-4 pushes the gear rod 5-2, so that the rotating disk 5-1 rotates the angle between the two adjacent gear rods 5-2, the rotating disk 5-1 drives the rotating shaft 4 to rotate the corresponding angle, so that the next storage slot with the blade installed is located at the lower side of the blade seat, After installation on the knife seat, the limiting mechanism 7 on the storage groove is released to achieve the effect of replacing the blade without the need for intermediate movement, which saves time. When the used blade is rotated to the cleaning ring 14, the cleaning motor 18 is started, and the cleaning motor 18 drives the reciprocating screw rod 17 to rotate. The reciprocating screw rod 17 drives the slider 16 thereon to reciprocate up and down through the thread. The slider 16 drives the cleaning ring 14 to move up and down through the connecting plate 15, so that the blade is cleaned by the bristles on the inner ring wall of the cleaning ring 14. When not in use, the cleaning ring 14 is driven by the reciprocating screw rod 17 to move to the lowermost side inside the fixed frame 1, thereby not affecting the rotation of the blade.

[0078] Compared with the prior art, the beneficial effects of this specific implementation are as follows:

[0079] 1. The blade storage assembly can be directly moved to one side of the blade holder through the fixing frame 1, the fixing plate 2 and the pushing mechanism 8, and then directly replaced, which saves the time of intermediate replacement and improves the efficiency of blade replacement;

[0080] 2. The blade storage rack 3 is connected to the equal-angle rotating mechanism 5 through the rotating shaft 4, so that during installation, the blade storage rack 3 can be driven by the equal-angle rotating mechanism 5 to rotate a fixed angle, ensuring that the blades are located at the lower side of the blade seat in sequence, thereby facilitating the replacement of the blades;

[0081] 3. The limiting mechanism 7 disposed inside the blade storage rack 3 can limit the blade in the storage slot, thereby increasing the stability of the blade in the storage slot during storage;

[0082] 4. A cleaning ring 14 is provided inside the fixing frame 1 so as to clean the blade inside the fixing frame 1, and the cleaning ring 14 can be driven to move back and forth up and down by the reciprocating screw rod 17, thereby improving the cleaning effect.

[0083] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic tool changing system for a numerically controlled machine tool, comprising a fixed frame (1), a fixed plate (2) and a blade storage frame (3), wherein the fixed frame (1) is arranged in a "U" shape, a fixed plate (2) is arranged at the rear side of a vertical plate of the fixed frame (1), the fixed plate (2) is fixedly connected to the inner wall of the machine tool, and a blade storage frame (3) is arranged inside the fixed frame (1); characterized in that: It also contains: A rotating shaft (4), the rotating shaft (4) passes through and is fixed in the blade storage frame (3), and the upper and lower ends of the rotating shaft (4) are respectively screwed to the horizontal plates on the upper and lower sides of the fixed frame (1) through bearings; An equal-angle rotation mechanism (5) is arranged in a horizontal plate at the lower side of the fixed frame (1), and the equal-angle rotation mechanism (5) is connected to the lower end of the rotation shaft (4); A support column (6), wherein the support column (6) is fixed to the horizontal plate at the lower side of the fixed frame (1), and the upper side of the support column (6) is movably inserted into the cylindrical groove at the lower side of the blade storage frame (3); A limiting mechanism (7), wherein the limiting mechanism (7) is arranged on the supporting column (6), and the limiting mechanism (7) is located in the blade storage rack (3), and the limiting mechanism (7) is arranged in coordination with a storage slot arranged at an equal angle on the blade storage rack (3); A pushing mechanism (8), wherein the pushing mechanism (8) is arranged on the fixing plate (2), and the pushing mechanism (8) is connected to the vertical plate of the fixing frame (1).

2. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: The equal-angle rotation mechanism (5) comprises: A rotating disk (5-1), the rotating disk (5-1) is arranged in a horizontal plate at the lower side of the fixed frame (1), the rotating disk (5-1) is sleeved and fixed on the lower end of the rotating shaft (4), a plurality of gear rods (5-2) are fixed at equal angles on the upper surface of the rotating disk (5-1), and the gear rods (5-2) are arranged corresponding to the number of storage slots; A driven rod (5-3), the driven rod (5-3) is screwed into the horizontal plate at the lower side of the fixed frame (1) through a bearing and is located on one side of the rotating disk (5-1); a toggle rod (5-4) is fixed to the upper end of the driven rod (5-3); the toggle rod (5-4) is located in the circular cavity of the horizontal plate at the lower side of the fixed frame (1); the toggle rod (5-4) is pushed and arranged in cooperation with the gear rod (5-2); An active rod (5-5), wherein the active rod (5-5) is screwed into a vertical plate of a fixed frame (1) via a bearing, the active rod (5-5) is connected to a driven rod (5-3) via a synchronous wheel transmission assembly, a rotating motor (5-6) is fixed to the upper end of the active rod (5-5), the rotating motor (5-6) is embedded and fixed in the vertical plate of the fixed frame (1), and the rotating motor (5-6) is connected to an external control system.

3. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: An annular slide rail (9) is fixed on the top wall of the support column (6), and the annular slide rail (9) is slidably arranged in an annular groove on the inner bottom wall of the blade storage rack (3).

4. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: The limiting mechanism (7) comprises: Arc-shaped plates (7-1), there are several arc-shaped plates (7-1), and the outer arc-shaped surface of the arc-shaped plates (7-1) is embedded in the arc-shaped groove on the inner wall of the storage groove; Arc-shaped slide bars (7-2), wherein there are a plurality of arc-shaped slide bars (7-2), and the arc-shaped slide bars (7-2) are symmetrically fixed on the side walls of the arc-shaped plate (7-1) in pairs, and the arc-shaped slide bars (7-2) are slidably arranged in the arc-shaped slide grooves on the upper and lower inner walls of the arc-shaped groove; A limit motor (7-3), wherein the limit motor (7-3) is embedded and fixed in the support column (6), the limit motor (7-3) is connected to an external control system, a driving gear (7-4) is fixed on the output shaft of the limit motor (7-3), and the teeth (7-5) of the driving gear (7-4) pass through the side wall of the support column (6) and are located in a circular groove on the inner bottom wall of the blade storage rack (3); The teeth (7-5) are multiple and are fixed on the outer ring wall of the arc plate (7-1) in equal amounts and at equal angles. The teeth (7-5) on the front arc plate (7-1) are meshed with the driving gear (7-4).

5. The automatic tool changing system for a CNC machine tool according to claim 4, characterized in that: The outer side of one side wall of the arc plate (7-1) abuts against a limiting plate (10), the limiting plate (10) is fixed on the inner wall of one side of the storage slot, and the outer side of the limiting plate (10) and the outer side of the blade storage rack (3) are arranged in the same arc surface.

6. The automatic tool changing system for a CNC machine tool according to claim 4, characterized in that: A push spring (11) is fixed on the inner wall of the arc-shaped plate (7-1), and the other end of the push spring (11) is fixed on the inner wall of the blade storage rack (3).

7. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: The pushing mechanism (8) comprises: Pushing connecting rods (8-1), wherein the pushing connecting rods (8-1) are in plurality, and two of them are connected in pairs by a shaft and are symmetrically arranged on the upper and lower sides of the rear side of the fixing frame (1), and the other ends of the two pushing connecting rods (8-1) in the same group are respectively connected by a hinge seat to the vertical plate of the fixing frame (1) and the fixing plate (2); Connecting rods (8-2), there are two connecting rods (8-2), which are symmetrically screwed into the fixing plate (2) via bearings, and both ends of the connecting rods (8-2) are respectively fixed on the pushing connecting rods (8-1) screwed onto the fixing plate (2); A driving rod (8-3) is embedded in the fixed plate (2) and is screwed to the fixed plate (2) via a bearing. Both ends of the driving rod (8-3) are connected to connecting rods (8-2) on both sides via a worm gear pair. A driving motor (8-4) is fixed to one end of the driving rod (8-3). The driving motor (8-4) is embedded in and fixed to the fixed plate (2).

8. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: A telescopic connecting rod (12) is symmetrically arranged between the fixed plate (2) and the fixed frame (1) in an upper and lower manner. The supporting rods on the four sides of the telescopic connecting rod (12) are all screwed to a rotating rod (13) through an axle rod. The other end of the rotating rod (13) is respectively embedded and screwed into the rear side wall of the vertical plate of the fixed frame (1) and the front side wall of the fixed plate (2) through the axle rod.

9. The automatic tool changing system for a CNC machine tool according to claim 1, characterized in that: A cleaning ring (14) is suspended inside the fixing frame (1), a connecting plate (15) is fixed on one side wall of the cleaning ring (14), and sliding blocks (16) are symmetrically fixed on the other side wall of the connecting plate (15), and the sliding blocks (16) are slidably arranged in the vertical plate of the fixing frame (1), and a reciprocating screw rod (17) is screwed in one of the sliding blocks (16) through a thread, and the upper end of the reciprocating screw rod (17) is screwed in the vertical plate of the fixing frame (1) through a bearing, and a cleaning motor (18) is fixed at the lower end of the reciprocating screw rod (17), and the cleaning motor (18) is embedded in the bottom side of the vertical plate of the fixing frame (1).

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