A machining center with tool changing structure

Abstract

The present invention discloses a machining center with a tool changing structure, comprising a machining center, a tool magazine and a clamping assembly. When the machining center is machining, the tool magazine first prepares a new tool used in the next process. After the machining center completes machining, the machining center spindle first sends the used tool to the clamping assembly, and then goes to the tool magazine to take out a new tool. Then the machining center starts a new process. The clamping assembly sends the used tool to the tool magazine, which reduces the time required for tool changing. The clamping assembly can send the used tool to a cleaning assembly, which cleans the used tool through the cleaning assembly, removes cutting residues, oil stains and impurities on the surface of the tool, and restores the smoothness of the tool surface, thereby improving the machining quality. The clamping assembly can also send the used tool to a recovery bracket, which is convenient for workers to take out the used tool to detect its wear condition and cutting edge condition.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, in particular to a machining center with a tool changing structure. Background Art

[0002] The machining center is a highly automated CNC machine tool that integrates more functions and features on the basis of the CNC milling machine. The machining center not only has all the basic functions of the CNC milling machine, such as milling, drilling, boring, etc., but also has a tool changing structure, which realizes the automatic tool changing function during the machining process, so that it can continuously perform multiple processes, greatly improving the machining efficiency and flexibility.

[0003] However, the tool changing structure of the existing machining center is generally to use a robot arm to send the used tool from the spindle to the tool magazine, the tool magazine selects a new tool, and the robot arm then sends the new tool from the tool magazine to the spindle. The tool replacement is slow, which affects the machining efficiency.

[0004] In addition, existing machining centers mainly use the method of splashing cutting fluid onto the tool to clean the tool, which has poor cleaning effect on cutting residues, oil stains and impurities on the tool surface. Workers are often required to take out the tools in the tool magazine for maintenance after the machining work is completed.

[0005] Therefore, it is necessary to design a machining center that can change tools faster and is easy to clean and maintain. Summary of the invention

[0006] The object of the present invention is to provide a machining center with a tool changing structure to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: comprising a machining center, a tool magazine and a clamping assembly, wherein the tool magazine and the clamping assembly are arranged on one side of the machining center, the tool magazine comprises a tool disc and a stand, the tool disc is rotatably arranged on the stand, the stand can be fixed on the ground, a plurality of spring clamps are fixed on the tool disc, the spring clamps clamp the tool handle through the V-shaped groove of the tool handle, and the tool disc is driven by a power mechanism;

[0008] A track is provided on one side of the tool magazine, the track can be fixed on the ground, a clamping assembly is slidably provided on the track, a push-out assembly is provided on the side of the track away from the tool magazine, the push-out assembly can be fixed on the ground, when the clamping assembly moves to the tool return point on the track, the push-out assembly can send the used tool to the tool magazine;

[0009] The spindle of the machining center sends the used tool to the clamping assembly at the starting point of the track. A cleaning assembly is arranged between the starting point of the track and the tool return point, and the cleaning assembly can be fixed on the ground. A recovery bracket is arranged at the end point of the track, and the recovery bracket can be fixed on the ground. When the clamping assembly moves to the end point of the track, the ejection assembly can also send the used tool to the recovery bracket.

[0010] Preferably, the spring clamp comprises a clamp bracket, a compression spring and two tool magazine half-jaws, each of the tool magazine half-jaws is rotatably arranged on the clamp bracket, the head of the tool magazine half-jaw can contact the V-shaped groove of the tool handle, the tail of the tool magazine half-jaw is fixed with a compression spring, the compression spring can keep the tails of the two tool magazine half-jaws away from each other and the heads close to each other, and the clamp bracket is fixed on the tool disc;

[0011] The power mechanism comprises an outer gear ring and a driving gear, wherein the outer gear ring is fixed on the cutter disc, the outer gear ring is meshedly connected with the driving gear, and the driving gear is driven by a tool magazine motor, and the tool magazine motor is fixed in the stand.

[0012] Preferably, the clamping assembly includes a clamping shell, two sliding rods and two clamping half-claws, a tubular shell is fixed on the clamping shell, the tubular shell is arranged on the connecting shell through a cylindrical pair, the connecting shell is slidably arranged on a track, two sliding rods are slidably arranged in the clamping shell, after the two sliding rods extend out of the clamping shell, they can clamp the tool handle through the V-shaped groove of the tool handle, the tail of each clamping half-claw is rotatably arranged on the clamping shell, the head of the clamping half-claw can clamp the tool handle through the conical handle of the tool handle, and a positioning plate is fixed under the clamping shell, and the positioning plate can contact the lower end surface of the tool handle.

[0013] Preferably, the sliding rod stroke is h1, the two sliding rods are fixed on the sliding rack, the sliding rack is meshed with a large gear of the double-layer gear, the large gear radius of the double-layer gear is r1, the small gear radius of the double-layer gear is r2, the small gear of the double-layer gear is meshed with a fixed rack, the fixed rack is fixed on the clamping shell, the double-layer gear is rotatably arranged on the gear bracket, the gear bracket is slidably arranged on the clamping shell, a half-claw rack is fixed on the gear bracket, the tail of the clamping half-claw is provided with gear teeth, the tail gear teeth of the clamping half-claw are meshed with the half-claw rack, the stroke of the half-claw rack is h2, the large gear radius r1 of the double-layer gear and the small gear radius r2 of the double-layer gear satisfy the following relationship, The gear bracket is driven by an electric push rod, and the electric push rod is fixed in the clamping shell.

[0014] Preferably, the direction of the cutter disc is that the rotation axis of the cutter disc is parallel to the ground, the direction of the knife handle is that the tapered handle faces the outside of the cutter disc, the track is fixed on the frame, the frame can be fixed on the ground, an X-shaped limit pin is fixed on the tubular shell, the X-shaped limit pin is slidably arranged in the limit plate, the X-shaped limit pin can limit the rotation of the tubular shell when sliding in the limit plate, the limit plate is fixed on the frame, and a flip gear is also fixed on the tubular shell, the flip gear can engage with the flip rack, the flip rack is fixed on the frame, the number of teeth on the flip rack is half of the number of teeth on the flip gear, the flip rack is arranged between the knife return point and the cleaning component, the limit plate is a two-stage structure, and a flip rack is arranged between the two limit plates.

[0015] Preferably, a tapered hole is provided at the top of the recovery bracket, and the tapered hole can contact the tapered handle of the knife handle.

[0016] Preferably, a ferromagnetic connecting plate is fixed on the side of the tubular shell away from the clamping assembly, a positioning hole is opened on the tubular shell, and a round-headed plunger pin is installed on the connecting shell, and the round-headed plunger pin can limit the free movement of the tubular shell through the positioning hole. The ejection assembly includes an incomplete gear, an ejection frame and an ejection bracket, the incomplete gear is driven by an ejection motor, and the ejection motor is fixed on the ejection bracket, and the ejection frame is slidably provided with the ejection frame, and two ejection racks are symmetrically provided in the ejection frame, each ejection rack can respectively mesh with the incomplete gear, and the number of teeth of the ejection rack is equal to the number of teeth of the incomplete gear, and an electromagnet is fixed on the ejection frame, and the electromagnet can adsorb the ferromagnetic connecting plate.

[0017] Preferably, the push-out bracket is slidably arranged on a wedge block, the wedge block can be fixed on the ground, the wedge block gradually decreases in height from the recovery bracket to the knife return point, a driven baffle is fixed on the push-out bracket, an active baffle is fixed on the connecting shell, the active baffle can contact the driven baffle, and limit blocks are fixed at both ends of the wedge block.

[0018] Preferably, a lead screw is rotatably arranged on the frame, the lead screw is threadedly connected to the connecting housing, the lead screw is driven by a rotary motor, and the rotary motor is fixed on the frame.

[0019] Preferably, the cleaning component includes a cleaning shell and multiple cleaning brushes, each cleaning brush is rotatably arranged on the cleaning shell, a cleaning pinion is coaxially fixed to the cleaning brush, the cleaning pinion is meshingly connected with a cleaning gear, the cleaning gear is rotatably arranged in the cleaning shell, the cleaning gear is driven by a cleaning motor, the cleaning motor is fixed under the cleaning shell, and the cleaning shell can be fixed on the ground.

[0020] Compared with the prior art, the invention has the following beneficial effects: when the machining center is processing, the tool magazine first prepares a new tool for the next process. After the machining center completes the processing, the spindle of the machining center first sends the used tool to the clamping assembly, and then goes to the tool magazine to take out a new tool. Then the machining center starts a new process, and the clamping assembly sends the used tool to the tool magazine, thereby reducing the time required for tool change.

[0021] The clamping assembly can send the used tools to the cleaning assembly, which cleans the used tools to remove cutting residues, oil stains and impurities on the tool surface, restore the smoothness of the tool surface, and thus improve the processing quality. The clamping assembly can also send the used tools to the recovery bracket, so that workers can take out the used tools to inspect their wear and edge conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an axonometric view of the present invention;

[0023] Figure 2 It is a front view of the knife handle of the present invention;

[0024] Figure 3 This is an axonometric view of the present invention, with the tool magazine removed;

[0025] Figure 4 For the present invention Figure 3 A local enlarged view of point A;

[0026] Figure 5 It is a front view of the spring clamp of the present invention;

[0027] Figure 6 It is an axonometric view of the clamping assembly, tubular housing and connecting housing of the present invention;

[0028] Figure 7 It is an axonometric view of the clamping assembly of the present invention, viewed from the top;

[0029] Figure 8 It is an axonometric view of the clamping assembly of the present invention, looking from the bottom;

[0030] Fig. 9 is a cross-sectional view of a clamping assembly of the present invention;

[0031] Fig.10 It is an axonometric view of the tubular housing, the connecting housing and the track of the present invention;

[0032] Fig.11 It is an axonometric view of the recovery support of the present invention;

[0033] Fig.12 An axonometric view of the launch assembly of the present invention;

[0034] Fig.13It is a schematic diagram of a round head plunger pin and a positioning hole of the present invention;

[0035] Fig.14 For the present invention Figure 1 A partial enlarged view of point B;

[0036] Fig.15 For the present invention Figure 3 A partial enlarged view of point C;

[0037] Fig.16 It is a cross-sectional view of the cleaning component of the present invention.

[0038] In the figure: 101, machining center, 102, recovery bracket, 103, tapered hole, 201, tool disc, 202, stand, 203, spring clamp, 204, clamp bracket, 205, compression spring, 206, tool magazine half claw, 207, outer gear ring, 208, drive gear, 300, clamping assembly, 301, clamping shell, 302, sliding rod, 303, clamping half claw, 304, tubular shell, 305, connecting shell, 306, positioning plate, 307, sliding rack, 308, double-layer gear, 309, fixed rack, 310, half claw rack, 311, gear bracket, 312, electric push rod, 400, tool handle, 401, V-groove, 402, tapered handle, 403 , lower end surface, 501, track, 502, frame, 503, X-shaped limit pin, 504, limit plate, 505, flip gear, 506, flip rack, 507, lead screw, 508, rotary motor, 600, ejection assembly, 601, ferromagnetic connecting plate, 602, round head plunger pin, 603, incomplete gear, 604, ejection frame, 605, ejection bracket, 606, ejection rack, 607, ejection motor, 609, electromagnet, 610, wedge block, 611, driven baffle, 612, active baffle, 700, cleaning assembly, 701, cleaning brush, 702, cleaning shell, 703, cleaning small gear, 704, cleaning large gear, 705, cleaning motor. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The present invention provides a technical solution: a machining center with a tool changing structure, such as Figure 1 , 2As shown, it includes a machining center 101, a tool magazine and a clamping assembly 300. The tool magazine and the clamping assembly 300 are arranged on one side of the machining center 101. The tool magazine includes a tool disc 201 and a stand 202. The tool disc 201 is rotatably arranged on the stand 202. The stand 202 can be fixed on the ground. A plurality of spring clamps 203 are fixed on the tool disc 201. The spring clamps 203 clamp the tool handle 400 through the V-groove 401 of the tool handle 400. The tool disc 201 is driven by a power mechanism. The tool handle 400 is a commonly used tool clamping device. The tool handle 400 has two positioning structures, namely the V-groove 401 and the tapered handle 402. The tool handle 400 is positioned on the spindle of the machining center 101 through the tapered handle 402.

[0041] When machining center 101 is processing, the tool magazine first prepares a new tool for the next process. After machining center 101 completes processing, the spindle of machining center 101 first sends the used tool to the clamping assembly 300, and then goes to the tool magazine to take out the new tool for the next process. Then machining center 101 starts a new process with the new tool, and the clamping assembly 300 sends the used tool to the tool magazine. Because the tool magazine has selected the new tool for the next process in advance when machining center 101 is processing, the waiting time of the spindle of machining center 101 is reduced, and when the clamping assembly 300 returns the tool, machining center 101 can start a new machining process with the new tool, which reduces the time required for tool change and improves work efficiency.

[0042] like Figure 1 , 3 As shown in FIG. 4 , a track 501 is provided on one side of the tool magazine, and the track 501 can be fixed on the ground. A clamping assembly 300 is slidably provided on the track 501. A pushing assembly 600 is provided on the side of the track 501 away from the tool magazine, and the pushing assembly 600 can be fixed on the ground. When the clamping assembly 300 moves to the tool return point on the track 501, the pushing assembly 600 can send the used tool to the tool magazine.

[0043] When the clamping assembly 300 returns the used tool to the tool magazine, the clamping assembly 300 clamps the tool handle 400, and the tool is clamped on the tool handle 400. The clamping assembly 300 first moves to the tool return point along the track 501, and the tool disc 201 rotates an empty spring clamp 203 to the clamping assembly 300, and the pushing assembly 600 pushes the clamping assembly 300 close to the tool disc 201. As the clamping assembly 300 moves, the tool handle 400 clamped with the tool enters the spring clamp 203 rotated to the clamping assembly 300. After the spring clamp 203 clamps the tool handle 400, the pushing assembly 600 drives the clamping assembly 300 to reset.

[0044] like Figure 3As shown, the spindle of the machining center 101 sends the used tool to the clamping assembly 300 at the starting point of the track 501, a cleaning assembly 700 is arranged between the starting point and the tool return point of the track 501, and the cleaning assembly 700 can be fixed on the ground, and a recovery bracket 102 is arranged at the end point of the track 501, and the recovery bracket 102 can be fixed on the ground. When the clamping assembly 300 moves to the end point of the track 501, the ejection assembly 600 can also send the used tool to the recovery bracket 102.

[0045] The clamping assembly 300 can send the used tool to the cleaning assembly 700, which cleans the used tool to remove cutting residues, oil stains and impurities on the tool surface, restore the smoothness of the tool surface, and thus improve the processing quality. The clamping assembly 300 can also send the used tool to the recovery bracket 102, so that workers can take out the used tool to detect its wear condition and cutting edge condition.

[0046] like Figure 5 As shown, the spring clamp 203 includes a clamp bracket 204, a compression spring 205 and two tool magazine half jaws 206. Each of the tool magazine half jaws 206 is rotatably arranged on the clamp bracket 204. The head of the tool magazine half jaw 206 can contact the V-shaped groove 401 of the tool handle 400. The tail of the tool magazine half jaw 206 is fixed with a compression spring 205. The compression spring 205 can keep the tails of the two tool magazine half jaws 206 away from each other and the heads close to each other. The clamp bracket 204 is fixed on the tool disc 201.

[0047] The compression spring 205 keeps the heads of the two tool magazine half jaws 206 close to each other, thereby clamping the tool handle 400. When the machining center 101 takes a new tool, the main shaft of the machining center 101 first approaches the spring clamp 203 and clamps the tool handle 400 holding the new tool. Then the main shaft of the machining center 101 moves away from the spring clamp 203, thereby driving the tool handle 400 to open the two tool magazine half jaws 206 and thus disengage from the spring clamp 203. When the clamping assembly 300 returns the used tool to the tool magazine, the pushing assembly 600 first pushes the clamping assembly 300 close to the tool disc 201, thereby driving the tool handle 400 holding the tool to open the two tool magazine half jaws 206, and the tool handle 400 then enters the spring clamp 203.

[0048] like Figure 1 As shown, the power mechanism includes an outer gear ring 207 and a driving gear 208. The outer gear ring 207 is fixed on the cutter disc 201, and the outer gear ring 207 is meshingly connected with the driving gear 208. The driving gear 208 is driven by a tool magazine motor, and the tool magazine motor is fixed in the stand 202. The tool magazine motor drives the driving gear 208 to rotate, and then drives the outer gear ring 207 to rotate, thereby driving the cutter disc 201 to rotate, and completing the tool selection work.

[0049] like Figure 6 ,7 As shown, the clamping assembly 300 includes a clamping shell 301, two sliding rods 302 and two clamping half claws 303. A tubular shell 304 is fixed on the clamping shell 301. The tubular shell 304 is arranged on a connecting shell 305 through a cylindrical pair. The cylindrical pair is a connection relationship between components. The two components connected by the cylindrical pair can rotate relative to each other and can slide relative to each other. The connecting shell 305 is slidably arranged on a track 501. The sliding rods 302 and the clamping shell 301 are arranged on a track 501. Two sliding rods 302 are movably provided, and after the two sliding rods 302 extend out of the clamping shell 301, they can clamp the tool handle 400 through the V-shaped groove 401 of the tool handle 400. The tail of each clamping half claw 303 is rotatably arranged on the clamping shell 301, and the head of the clamping half claw 303 can clamp the tool handle 400 through the tapered handle 402 of the tool handle 400. A positioning plate 306 is fixed under the clamping shell 301, and the positioning plate 306 can contact the lower end surface 403 of the tool handle 400.

[0050] When the spindle of the machining center 101 releases the used tool, the spindle of the machining center 101 first inserts the V-shaped groove 401 of the tool holder 400 holding the used tool between the two sliding rods 302, and then the spindle of the machining center 101 releases the tool holder 400. Finally, the spindle of the machining center 101 moves away from the clamping assembly 300, and the used tool remains on the clamping assembly 300. Then, the sliding rod 302 retracts into the clamping housing 301, and the positioning plate 306 and the two clamping half claws are moved. 303 clamps the tool handle 400 through the tapered handle 402 and the lower end surface 403 of the tool handle 400. When the clamping assembly 300 returns the used tool, the clamping assembly 300 extends out of the connecting shell 305, so that the V-shaped groove 401 of the tool handle 400 enters into the spring clamping claw 203, and then the clamping half-claw 303 releases the tapered handle 402 of the tool handle 400, and then the tubular shell 304 retracts into the connecting shell 305, and the sliding rod 302 extends out of the clamping shell 301.

[0051] The sliding rod 302 and the V-groove 401 of the tool handle 400 are positioned to facilitate the release of the used tool from the spindle of the machining center 101. The tool handle 400 is clamped by the clamping half-jaw 303 and the positioning plate 306, which facilitates the clamping assembly 300 to transport the tool handle 400. After the clamping half-jaw 303 clamps the tool handle 400, the sliding rod 302 retracts into the clamping shell 301, avoiding interference between the spring clamp 203 and the sliding rod 302 at the V-groove 401 of the tool handle 400 when returning the used tool.

[0052] like Figure 7 , 8As shown in , 9, the travel of the sliding rod 302 is h1, and both sliding rods 302 are fixed on the sliding rack 307. The sliding rack 307 is meshed with a large gear of a double-layer gear 308, and the radius of the large gear of the double-layer gear 308 is r1. The radius of the small gear of the double-layer gear 308 is r2. The small gear of the double-layer gear 308 is meshed with a fixed rack 309, and the fixed rack 309 is fixed on the clamping shell 301. The double-layer gear 308 is rotatably set on the gear bracket 311, and the gear bracket 311 is slidably set on the clamping shell 301. A half-claw rack 310 is fixed on the gear bracket 311. The tail of the clamping half-claw 303 is provided with gear teeth, and the tail gear teeth of the clamping half-claw 303 are meshed with the half-claw rack 310. The travel of the half-claw rack 310 is h2. The radius r1 of the large gear of the double-layer gear 308 and the radius r2 of the small gear of the double-layer gear 308 satisfy the following relationship, The gear bracket 311 is driven by an electric push rod 312 , and the electric push rod 312 is fixed in the clamping shell 301 .

[0053] The extension and retraction of the electric push rod 312 drives the gear bracket 311 to move at a speed v, thereby driving the double-layer gear 308 to roll on the fixed rack 309. The double-layer gear 308 then drives the sliding rack 307 to move, thereby driving the sliding rod 302 to move. The movement of the gear bracket 311 can also drive the half-claw rack 310 to move, thereby driving the clamping half-claw 303 to rotate.

[0054] The speed of the sliding rack 307 can be obtained by the following method. According to the principle of relative motion, a common speed -v is added to the whole composed of the gear bracket 311, the double-layer gear 308 and the sliding rack 307. At this time, the relative motion relationship between the gear bracket 311, the double-layer gear 308 and the sliding rack 307 remains unchanged, and the speed of the gear bracket 311 becomes vv=0, that is, the gear bracket 311 is relatively stationary. At this time, the fixed rack 309 drives the double-layer gear 308 to rotate at a relative speed v, thereby driving the sliding rack 307 to move. The relative speed of the sliding rack 307 is v, so the speed at which the sliding rack 307 moves relative to the clamping housing 301 is v+v.

[0055] After the used tool is released from the spindle of the machining center 101, the electric push rod 312 extends, thereby driving the gear bracket 311 to move, thereby driving the sliding rack 307 to move, and the movement of the sliding rack 307 drives the sliding rod 302 to retract. When the sliding rod 302 retracts, it gradually separates from the V-shaped groove 401 of the tool handle 400, and after being completely separated, it passes through a period of idle travel and finally retracts into the clamping shell 301. During this period, the movement of the gear bracket 311 can also drive the half-claw rack 310 to move, thereby driving the clamping half-claw 303 to rotate, thereby clamping the tapered handle of the tool handle 400. 402, when the clamping half-claw 303 rotates, it first passes through an idle stroke, then gradually contacts with the tapered handle 402 of the tool handle 400, and finally clamps the tool handle 400. After the V-groove 401 of the tool handle 400 enters the spring clamping claw 203, the electric push rod 312 retracts, thereby driving the clamping half-claw 303 to rotate in the opposite direction, thereby loosening the tapered handle 402 of the tool handle 400. During this period, the sliding rod 302 is in the idle stroke of the extension stroke, and then the tubular shell 304 retracts into the connecting shell 305, the clamping half-claw 303 is in the idle stroke, and the sliding rod 302 continues to extend.

[0056] Through the cooperation of the gear bracket 311, the sliding rack 307, the double-layer gear 308 and the fixed rack 309, the sliding rod 302 and the clamping half claw 303 are easy to drive and control, and the cooperation between the sliding rod 302 and the clamping half claw 303 is more stable.

[0057] like Fig.10 As shown, the direction of the cutter disc 201 is that the rotation axis of the cutter disc 201 is parallel to the ground, the direction of the cutter handle 400 is that the tapered handle 402 faces the outside of the cutter disc 201, the track 501 is fixed on the frame 502, the frame 502 can be fixed on the ground, and an X-shaped limit pin 503 is fixed on the tubular shell 304, and the X-shaped limit pin 503 is slidably arranged in the limit plate 504, and the X-shaped limit pin 503 can limit the tubular shell 304 when sliding in the limit plate 504. Rotation, the limit plate 504 is fixed on the frame 502, and a flip gear 505 is also fixed on the tubular shell 304. The flip gear 505 can engage with the flip rack 506. The flip rack 506 is fixed on the frame 502. The number of teeth on the flip rack 506 is half of the number of teeth on the flip gear 505. The flip rack 506 is arranged between the knife return point and the cleaning component 700. The limit plate 504 is a two-stage structure, and a flip rack 506 is arranged between the two sections of the limit plate 504.

[0058] When the connecting shell 305 moves along the track 501, it first passes through the first section limit plate 504, the X-shaped limit pin 503 contacts the limit plate 504, the tubular shell 304 remains stationary, and the tapered handle 402 of the tool handle 400 clamped by the clamping assembly 300 is upward. When the X-shaped limit pin 503 disengages from the first section limit plate 504, the flip gear 505 and the flip rack 506 enter into meshing, and then the flip gear 505 drives the tubular shell 304 to rotate half a circle. When the flip gear 505 and the flip rack 506 disengage, the X-shaped limit pin 503 enters the second section limit Plate 504, the tubular shell 304 remains stationary, the tapered handle 402 of the tool holder 400 is downward, when the connecting shell 305 moves to the tool return point, the tool disc 201 rotates the empty spring clamp 203 to the lowest point, and the clamping assembly 300 returns the used tool to the empty spring clamp 203. When the spindle of the machining center 101 takes a new tool, the spindle is first rotated to a horizontal state, and then the spring clamp 203 closest to the machining center 101 is approached, and the tool holder 400 holding the new tool is clamped, and finally the spindle of the machining center 101 is away from the spring clamp 203 to take out the new tool.

[0059] The tool disc 201 is arranged vertically as a whole, which reduces the floor space of the tool disc 201 and improves the space utilization rate. The direction of the tool handle 400 is such that the tapered handle 402 faces the outside of the tool disc 201, which is convenient for the spindle of the machining center 101 to contact the tapered handle 402 of the tool handle 400, and convenient for the machining center 101 to take a new tool. Through the cooperation of the X-shaped limit pin 503, the flip gear 505 and the flip rack 506, the tool handle 400 can change direction during movement, so that the clamping assembly 300 can return the used tool in the correct direction, which is convenient for the clamping assembly 300 to return the used tool.

[0060] like Fig.11 As shown, a conical hole 103 is provided on the top of the recovery bracket 102, and the conical hole 103 can contact the conical handle 402 of the tool handle 400. When the recovery bracket 102 receives the used tool, the clamping assembly 300 moves to the end point of the track 501, and the clamping assembly 300 extends out of the connecting shell 305, and then the clamping half claw 303 releases the conical handle 402 of the tool handle 400, and the tool handle 400 falls into the conical hole 103, and then the tubular shell 304 retracts into the connecting shell 305.

[0061] like Figure 6 , 12As shown in Figures 13, a ferromagnetic connecting plate 601 is fixed to one side of the tubular shell 304 away from the clamping assembly 300, a positioning hole is provided on the tubular shell 304, and a round-headed plunger pin 602 is installed on the connecting shell 305. The round-headed plunger pin is a common limiting part that is locked by a spring. The round-headed plunger pin 602 can limit the free movement of the tubular shell 304 through the positioning hole. The ejection assembly 600 includes an incomplete gear 603, an ejection frame 604 and an ejection bracket 605. The incomplete gear The wheel 603 is driven by the ejection motor 607, and the ejection motor 607 is fixed on the ejection bracket 605. The ejection frame 604 is slidably arranged on the ejection bracket 605. Two ejection racks 606 are symmetrically arranged in the ejection frame 604. Each ejection rack 606 can be respectively engaged with the incomplete gear 603. The number of teeth of the ejection rack 606 is equal to the number of teeth of the incomplete gear 603. An electromagnet 609 is fixed on the ejection frame 604, and the electromagnet 609 can adsorb the ferromagnetic connecting plate 601.

[0062] When the clamping assembly 300 returns the used tool to the tool magazine, the ejection motor 607 drives the incomplete gear 603 to rotate. The incomplete gear 603 first meshes with a ejection rack 606, and then drives the ejection frame 604 to move, thereby driving the electromagnet 609 to approach and then adsorb the ferromagnetic connecting plate 601. The ejection frame 604 continues to move, driving the tubular shell 304 to move, thereby pushing the round head plunger pin 602 and extending it out of the connecting shell 305, and then driving the tool handle 400 into the spring clamp 203. At this time, the incomplete gear 603 and The ejection rack 606 is disengaged and the ejection frame 604 remains stationary. While the ejection frame 604 remains stationary, the clamping assembly 300 loosens the tapered handle 402 of the tool handle 400. Subsequently, the incomplete gear 603 engages with another ejection rack 606, thereby driving the ejection frame 604 to move in the opposite direction, thereby driving the tubular shell 304 to retract and connect to the shell 305. After the tubular shell 304 retracts, the round head plunger pin 602 is inserted into the positioning hole, the electromagnet 609 is powered off, and the incomplete gear 603 is disengaged from the ejection rack 606.

[0063] Through the cooperation of the incomplete gear 603, the ejection frame 604 and the electromagnet 609, the tubular shell 304 can be briefly stationary for a period of time during the reciprocating movement, so that the clamping assembly 300 can release the tapered handle 402 of the tool handle 400, making the ejection assembly 600 and the clamping assembly 300 easy to control.

[0064] like Fig.14As shown, the ejection bracket 605 is slidably set on the wedge block 610, and the wedge block 610 can be fixed on the ground. The wedge block 610 is gradually lowered from the recovery bracket 102 to the knife return point. A driven baffle 611 is fixed on the ejection bracket 605, and an active baffle 612 is fixed on the connecting shell 305. The active baffle 612 can contact the driven baffle 611. Limit blocks are fixed at both ends of the wedge block 610 to prevent the ejection bracket 605 from accidentally falling.

[0065] The movement of the active baffle 612 from the tool return point to the recovery bracket 102 can drive the ejection assembly 600 to move from the tool return point to the recovery bracket 102 through the driven baffle 611. When the active baffle 612 moves from the recovery bracket 102 to the tool return point, the ejection assembly 600 moves from the recovery bracket 102 to the tool return point under the action of its own weight and the wedge block 610. Through the cooperation of the wedge block 610, the active baffle 612 and the driven baffle 611, the ejection assembly 600 can move at both the tool return point and the recovery bracket 102, which is convenient for the clamping assembly 300 to return the used tool and send the used tool to the recovery bracket 102.

[0066] like Figure 4 As shown, a lead screw 507 is rotatably arranged on the frame 502, the lead screw 507 is threadedly connected to the connecting housing 305, and the lead screw 507 is driven by a rotary motor 508, and the rotary motor 508 is fixed on the frame 502. The rotary motor 508 drives the lead screw 507 to rotate, thereby driving the connecting housing 305 to move along the track 501.

[0067] like Fig.15 , 16 As shown, the cleaning component 700 includes a cleaning shell 702 and a plurality of cleaning brushes 701, each cleaning brush 701 is rotatably arranged on the cleaning shell 702, a cleaning pinion 703 is coaxially fixed to the cleaning brush 701, the cleaning pinion 703 is meshingly connected with a cleaning gear 704, the cleaning gear 704 is rotatably arranged in the cleaning shell 702, the cleaning gear 704 is driven by a cleaning motor 705, the cleaning motor 705 is fixed under the cleaning shell 702, and the cleaning shell 702 can be fixed on the ground.

[0068] When the clamping assembly 300 delivers the used tool to the cleaning assembly 700, the cleaning motor 705 drives the cleaning gear 704 to rotate, and then drives the cleaning gear 703 to rotate, thereby driving the cleaning brush 701 to rotate, and then cleaning the used tool.

[0069] Working process: When machining center 101 is processing, the tool magazine first prepares a new tool used in the next process. After machining center 101 completes processing, the spindle of machining center 101 first sends the used tool to the clamping assembly 300. When the spindle of machining center 101 releases the used tool, the spindle of machining center 101 first inserts the V-groove 401 of the tool holder 400 that clamps the used tool between the two sliding rods 302, and then the spindle of machining center 101 releases the tool holder 400. Finally, the spindle of machining center 101 moves away from the clamping assembly 300, and the used tool remains on the clamping assembly 300.

[0070] The main shaft of the machining center 101 goes to the tool magazine to take out a new tool used in the next process. When the machining center 101 takes the new tool, it first rotates the main shaft to a horizontal state, then approaches the spring clamp 203 closest to the machining center 101, clamps the tool handle 400 holding the new tool, and then the main shaft of the machining center 101 moves away from the spring clamp 203, thereby driving the tool handle 400 to open the two tool magazine half jaws 206, thereby disengaging from the spring clamp 203, and then the machining center 101 starts a new process with the new tool.

[0071] After the clamping assembly 300 receives the used tool, the electric push rod 312 extends, thereby driving the gear bracket 311 to move, thereby driving the sliding rack 307 to move, and the movement of the sliding rack 307 drives the sliding rod 302 to retract. When the sliding rod 302 retracts, it first gradually separates from the V-groove 401 of the tool handle 400, and after being completely separated, it passes through a period of idle stroke, and finally retracts into the clamping shell 301. During this period, the movement of the gear bracket 311 can also drive the half-claw rack 310 to move, and then drives the clamping half-claw 303 to rotate, thereby clamping the tapered handle 402 of the tool handle 400. When the clamping half-claw 303 rotates, it first passes through a period of idle stroke, and then gradually contacts with the tapered handle 402 of the tool handle 400, and finally clamps the tool handle 400.

[0072] Subsequently, the rotary motor 508 drives the lead screw 507 to rotate, thereby driving the connecting shell 305 to move along the track 501. The connecting shell 305 first drives the used tool to pass through the cleaning component 700, and the used tool is cleaned by the cleaning component 700. Subsequently, the connecting shell 305 continues to move along the track 501, first passing through the first section limit plate 504, the X-shaped limit pin 503 contacts the limit plate 504, the tubular shell 304 remains stationary, and the tapered handle 402 of the tool handle 400 clamped by the clamping assembly 300 is upward. When the X-shaped limit pin 503 disengages from the first section limit plate 504, the flip gear 505 and the flip rack 506 enter into meshing. Subsequently, the flip gear 505 drives the tubular shell 304 to rotate half a circle. When the flip gear 505 and the flip rack 506 disengage, the X-shaped limit pin 503 enters the second section limit plate 504, the tubular shell 304 remains stationary, and the tapered handle 402 of the tool handle 400 is downward.

[0073] When the connecting shell 305 moves to the tool return point, the knife disc 201 rotates the empty spring clamp 203 to the lowest point, and the clamping assembly 300 returns the used tool to the empty spring clamp 203. The ejection motor 607 drives the incomplete gear 603 to rotate. The incomplete gear 603 first engages with an ejection rack 606, and then drives the ejection frame 604 to move, thereby driving the electromagnet 609 to approach and then adsorb the ferromagnetic connecting plate 601. The ejection frame 604 continues to move, driving the tubular shell 304 to move, and then pushes the round head plunger pin 602 and extends it out of the connecting shell 305, thereby driving the knife handle 400 into the spring clamp 203. At this time, the incomplete gear 603 is disengaged from the ejection rack 606, and the ejection frame 604 remains stationary.

[0074] While the ejection frame 604 remains stationary, the tool handle 400 clamped with the tool enters the spring clamp 203 rotated to the clamping assembly 300, and then the electric push rod 312 retracts to drive the clamping half-claw 303 to rotate in the opposite direction, thereby releasing the tapered handle 402 of the tool handle 400, and the spring clamp 203 clamps the tool handle 400.

[0075] Subsequently, the incomplete gear 603 engages with another ejection rack 606, thereby driving the ejection frame 604 to move in the opposite direction, thereby driving the tubular shell 304 to retract into the connecting shell 305. After the tubular shell 304 retracts, the round head plunger pin 602 is inserted into the positioning hole, the electromagnet 609 is powered off, and the incomplete gear 603 disengages from the ejection rack 606. During this period, the sliding rod 302 extends out of the clamping shell 301.

[0076] When the clamping assembly 300 does not return the used tool and the used tool is recovered by the recovery bracket 102, the clamping assembly 300 does not stop when moving to the tool return point of the track 501 through the track 501 but continues to move directly to the end point of the track 501. The active baffle 612 moves from the tool return point to the recovery bracket 102 through the driven baffle 611 to drive the ejection assembly 600 from the tool return point to the recovery bracket 102. The ejection assembly 600 extends the tubular shell 304, and then the electric push rod 312 retracts to drive the clamping half claw 303 to rotate in the opposite direction, thereby releasing the tapered handle 402 of the tool handle 400, and the tool handle 400 falls into the tapered hole 103.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machining center with a tool changing structure, characterized in that: The invention comprises a machining center (101), a tool magazine and a clamping assembly (300), wherein the tool magazine and the clamping assembly (300) are arranged on one side of the machining center (101), the tool magazine comprises a tool disc (201) and a stand (202), the tool disc (201) is rotatably arranged on the stand (202), the stand (202) can be fixed on the ground, a plurality of spring clamps (203) are fixed on the tool disc (201), the spring clamps (203) clamp the tool handle (400) through the V-shaped groove (401) of the tool handle (400), and the tool disc (201) is driven by a power mechanism; A track (501) is provided on one side of the tool magazine, the track (501) can be fixed on the ground, a clamping assembly (300) is slidably provided on the track (501), a pushing assembly (600) is provided on the side of the track (501) away from the tool magazine, the pushing assembly (600) can be fixed on the ground, and when the clamping assembly (300) moves to a tool return point on the track (501), the pushing assembly (600) can send a used tool to the tool magazine; The spindle of the machining center (101) sends the used tool to the clamping assembly (300) at the starting point of the track (501); a cleaning assembly (700) is arranged between the starting point of the track (501) and the tool return point; the cleaning assembly (700) can be fixed on the ground; a recovery bracket (102) is arranged at the end point of the track (501); the recovery bracket (102) can be fixed on the ground; when the clamping assembly (300) moves to the end point of the track (501), the ejection assembly (600) can also send the used tool to the recovery bracket (102).

2. A machining center with a tool changing structure according to claim 1, characterized in that: The spring clamp (203) comprises a clamp bracket (204), a compression spring (205) and two tool magazine half-jaws (206); each tool magazine half-jaw (206) is rotatably arranged on the clamp bracket (204); the head of the tool magazine half-jaw (206) can contact the V-shaped groove (401) of the tool handle (400); the tail of the tool magazine half-jaw (206) is fixed with a compression spring (205); the compression spring (205) can keep the tails of the two tool magazine half-jaws (206) away from each other and the heads close to each other; the clamp bracket (204) is fixed on the tool disc (201); The power mechanism comprises an outer gear ring (207) and a driving gear (208); the outer gear ring (207) is fixed on the cutter disc (201); the outer gear ring (207) is meshingly connected with the driving gear (208); the driving gear (208) is driven by a tool magazine motor; and the tool magazine motor is fixed in the platform (202).

3. A machining center with a tool changing structure according to claim 1, characterized in that: The clamping assembly (300) comprises a clamping shell (301), two sliding rods (302) and two clamping half claws (303). A tubular shell (304) is fixed to the clamping shell (301). The tubular shell (304) is arranged on a connecting shell (305) through a cylindrical pair. The connecting shell (305) slides on a track (501). Two sliding rods (302) are slidably arranged in the clamping shell (301). The two sliding rods (302) extend outward. The clamping shell (301) can clamp the knife handle (400) through the V-shaped groove (401) of the knife handle (400), the tail of each clamping half claw (303) is rotatably arranged on the clamping shell (301), the head of the clamping half claw (303) can clamp the knife handle (400) through the tapered handle (402) of the knife handle (400), and a positioning plate (306) is fixed under the clamping shell (301), and the positioning plate (306) can contact the lower end surface (403) of the knife handle (400).

4. A machining center with a tool changing structure according to claim 3, characterized in that: The sliding rod (302) has a stroke of h1. Both sliding rods (302) are fixed on the sliding rack (307). The sliding rack (307) is meshed with a large gear of a double-layer gear (308). The radius of the large gear of the double-layer gear (308) is r1. The radius of the small gear of the double-layer gear (308) is r2. The small gear of the double-layer gear (308) is meshed with a fixed rack (309). The fixed rack (309) is fixed on the clamping housing (301). The double-layer gear (308) rotates The gear support (311) is arranged on the gear support (311), and the gear support (311) is slidably arranged on the clamping housing (301). A half-claw rack (310) is fixed on the gear support (311). The tail of the clamping half-claw (303) is provided with gear teeth. The tail gear teeth of the clamping half-claw (303) are meshed and connected to the half-claw rack (310). The stroke of the half-claw rack (310) is h2. The large gear radius r1 of the double-layer gear (308) and the small gear radius r2 of the double-layer gear (308) satisfy the following relationship: The gear support (311) is driven by an electric push rod (312), and the electric push rod (312) is fixed in the clamping housing (301).

5. The machining center with a tool changing structure according to claim 3, characterized in that: The direction of the cutter disc (201) is such that the rotation axis of the cutter disc (201) is parallel to the ground, the direction of the cutter handle (400) is such that the tapered handle (402) faces the outside of the cutter disc (201), the track (501) is fixed on the frame (502), the frame (502) can be fixed on the ground, an X-shaped limit pin (503) is fixed on the tubular shell (304), the X-shaped limit pin (503) is slidably arranged in the limit plate (504), and the X-shaped limit pin (503) can limit the rotation of the tubular shell (304) when sliding in the limit plate (504). The limit plate (504) is fixed on the frame (502), and a flip gear (505) is also fixed on the tubular shell (304). The flip gear (505) can mesh with a flip rack (506). The flip rack (506) is fixed on the frame (502). The number of teeth of the flip rack (506) is half the number of teeth of the flip gear (505). The flip rack (506) is arranged between the knife return point and the cleaning component (700). The limit plate (504) is a two-stage structure, and a flip rack (506) is arranged between the two stages of the limit plate (504).

6. A machining center with a tool changing structure according to claim 5, characterized in that: A conical hole (103) is provided at the top of the recovery bracket (102), and the conical hole (103) is capable of contacting the conical handle (402) of the knife handle (400).

7. The machining center with a tool changing structure according to claim 3, characterized in that: A ferromagnetic connecting plate (601) is fixed to a side of the tubular housing (304) away from the clamping assembly (300); a positioning hole is provided on the tubular housing (304); a round-head plunger pin (602) is installed on the connecting housing (305); the round-head plunger pin (602) can limit the free movement of the tubular housing (304) through the positioning hole; the ejection assembly (600) comprises an incomplete gear (603), an ejection frame (604) and an ejection bracket (605); the incomplete gear (603) is driven by an ejection motor (607); The ejection motor (607) is fixed on the ejection bracket (605), and the ejection frame (604) is slidably arranged on the ejection bracket (605). Two ejection racks (606) are symmetrically arranged in the ejection frame (604), and each ejection rack (606) can respectively mesh with the incomplete gear (603). The number of teeth of the ejection rack (606) is equal to the number of teeth of the incomplete gear (603). An electromagnet (609) is fixed on the ejection frame (604), and the electromagnet (609) can adsorb the ferromagnetic connecting plate (601).

8. The machining center with a tool changing structure according to claim 7, characterized in that: The push-out bracket (605) is slidably arranged on the wedge block (610), the wedge block (610) can be fixed on the ground, the wedge block (610) is gradually lowered from the recovery bracket (102) to the knife return point, a driven baffle (611) is fixed on the push-out bracket (605), an active baffle (612) is fixed on the connecting shell (305), the active baffle (612) can contact the driven baffle (611), and limit blocks are fixedly arranged at both ends of the wedge block (610).

9. The machining center with a tool changing structure according to claim 5, characterized in that: A lead screw (507) is rotatably arranged on the frame (502), the lead screw (507) is threadedly connected to the connecting housing (305), and the lead screw (507) is driven by a rotary motor (508), and the rotary motor (508) is fixed on the frame (502).

10. The machining center with a tool changing structure according to claim 1, characterized in that: The cleaning assembly (700) comprises a cleaning housing (702) and a plurality of cleaning brushes (701), each cleaning brush (701) being rotatably arranged on the cleaning housing (702), a cleaning pinion (703) being coaxially fixed to the cleaning brush (701), the cleaning pinion (703) being meshingly connected to a cleaning gear (704), the cleaning gear (704) being rotatably arranged in the cleaning housing (702), the cleaning gear (704) being driven by a cleaning motor (705), the cleaning motor (705) being fixed under the cleaning housing (702), and the cleaning housing (702) being capable of being fixed on the ground.

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