Five-axis gantry machine tool

Abstract

The invention relates to a five-axis gantry machine tool, and relates to the technical field of machine tools, the machine tool comprises a machine body, a working table, two mounting seats, a rotary table, an indexing head and a protective device, the protective device comprises two protective covers, and the two protective covers are provided with mounting holes for a rotating shaft to pass through; the two protective sheets are arranged on the two protective covers, abut against the rotary table and are used for preventing chippings from making contact with the rotary shaft; the two supporting mechanisms are arranged on the rotary table, after one ends of the supporting mechanisms are spliced, a receding hole allowing the dividing head to pass through is formed, the other ends of the supporting mechanisms are rotationally connected with the two protective covers through rotating assemblies correspondingly, and the two supporting mechanisms and the two protective covers can conduct wrapping protection on the rotary table. The workpieces collide with the supporting mechanism when falling off, the supporting mechanism can buffer the workpieces, damage to the rotary table is reduced, chippings fall on the surface of the supporting mechanism, and therefore the machining precision of the machine tool is improved, and chipping cleaning convenience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gantry machine tools, and in particular to a five-axis gantry machine tool. Background Art

[0002] Currently, there is an increasing demand for five-axis machining of complex products and high-efficiency and high-precision machining in the automotive, aerospace, medical and other fields.

[0003] In order to realize five-axis machining, the existing solution is to set a horizontal rotating turntable on the CNC machine tool worktable, and install a vertical rotating dividing head on the turntable as required, so as to realize five-axis machining through the linkage of multiple structures.

[0004] The workpiece is clamped on the dividing head, which makes it easy for the workpiece to collide with the surface of the turntable during the clamping process, which can easily cause damage to the turntable surface; at the same time, the debris generated during processing can easily enter the rotating part of the turntable and accumulate on the turntable, which will cause certain damage to the turntable, reduce the processing accuracy of the machine tool, and make it inconvenient to clean the debris. Summary of the invention

[0005] In order to improve the machining accuracy of a machine tool and facilitate the cleaning of debris, the present application provides a five-axis gantry machine tool.

[0006] The present application provides a five-axis gantry machine tool, which adopts the following technical solution: A five-axis gantry machine tool comprises a machine body, a worktable, two mounting seats arranged on the worktable, a turntable rotatably mounted on the two mounting seats via a rotating shaft, a dividing head rotatably mounted on the turntable, and a protective device for protecting the turntable, wherein the protective device comprises: Two protective covers are detachably mounted on two mounting seats and are provided with mounting holes for the rotating shaft to pass through; Two protective sheets, which are arranged on the two protective covers and abut against the turntable and are used to prevent debris from contacting the rotating shaft; Two supporting mechanisms are arranged on the turntable and one end is spliced ​​with each other to form a clearance hole for the dividing head to pass through, and the other end is rotatably connected to the two protective covers through a rotating component. The two supporting mechanisms and the two protective covers can cover and protect the turntable.

[0007] By adopting the above technical solution, two protective covers are fixedly installed on two mounting seats, and the rotating shaft passes through the mounting hole to make way, and two protective plates are against the turntable and are used to prevent debris from contacting the rotating shaft. At the same time, the debris falling on the protective covers can fall downward under the action of gravity.

[0008] One end of two support mechanisms is spliced together to form a relief hole for the dividing head to pass through, and then the two support mechanisms are fixedly installed on the rotary table. The ends of the two support mechanisms away from the dividing head are connected to the protective cover through a rotating assembly, so that the two protective covers and the two support mechanisms can cooperate to wrap and protect the rotary table, especially the surface of the rotary table near the dividing head.

[0009] When replacing the workpiece, the rotary table will be in the initial state, that is, the surface of the rotary table where the dividing head is installed faces upward. Thus, when replacing the workpiece, no matter where the workpiece falls, it will collide with the support mechanism. The support mechanism can buffer the workpiece, reducing damage to the rotary table. Moreover, debris falls on the surface of the support mechanism, and the debris can fall to the outside of the rotary table under the action of the coolant or gas used for cooling during machine tool processing, thereby improving the machining accuracy of the machine tool and the convenience of debris cleaning.

[0010] At the same time, the rotation of the rotary table drives the rotation of the two support mechanisms. The rotation of the two support mechanisms is connected to the protective cover through a rotating assembly. Therefore, when the rotary table rotates, it will not drive the protective cover to rotate, making the orifice of the mounting hole always located below the rotating shaft, reducing the risk of debris contacting the rotating shaft through the mounting hole after the rotation of the protective cover drives the rotation of the mounting hole. Therefore, the protective effect on the rotary table is further improved, and the machining accuracy of the machine tool is further improved.

[0011] Optionally, the support mechanism includes: A support plate, which abuts against the rotary table and is arched. The relief hole is formed by the abutting and splicing of two support plates. A buffer cavity for buffering is formed by the cooperation between the support plate and the rotary table; A buffer member, which is placed on the support plate and located in the buffer cavity and is used to buffer the force received by the support plate; A positioning assembly, which is arranged on the support plate and connected to the rotary table for positioning and is used to limit the position of the buffer member.

[0012] By adopting the above technical solution, first place the buffer member on the rotary table. The lower surface of the support plate abuts against the rotary table and forms a buffer cavity with the rotary table, so that the buffer member is located in the buffer cavity for limiting. At the same time, one end of the two support plates abuts against each other and is spliced to form a relief hole for the dividing head to pass through. The other ends of the two support plates are rotatably connected to the protective cover through a rotating assembly. Finally, the support plate is positioned by the positioning assembly, thus realizing the installation of the support mechanism.

[0013] The arch shape of the support plate can better provide buffering force and facilitate the falling of debris. At the same time, through the design of the buffer member, it can increase the contact between the bottom of the buffer member and the surface of the turntable as much as possible and the contact between the top and the support plate as much as possible, thereby increasing the force-bearing area, further improving the support and buffering effect of the support plate, reducing the damage to the surface of the turntable, improving the machining accuracy of the machine tool and the convenience during debris cleaning.

[0014] Optionally, the positioning assembly includes: Two first positioning plates, which are arranged on the support plate and located on both sides of the turntable; Two second positioning plates, which are arranged on the first positioning plates through positioning screws and are abutted against the side wall of the turntable away from the support plate for positioning.

[0015] By adopting the above technical solution, the two first positioning plates can be abutted against the opposite side walls of the turntable for positioning, and then the two second positioning plates are respectively fixedly installed on the two first positioning plates through positioning screws, and the two second positioning plates are abutted against the side wall of the turntable away from the support plate for positioning, so as to fix the support plate.

[0016] Optionally, the buffer member includes: A bottom plate, which is abutted against the turntable; An arc-shaped plate, which is arranged on the bottom plate and is arc-shaped and forms a receiving cavity with the bottom plate. The arc-shaped plate is elastic and closely adheres to the support plate for support and buffering; An airbag, which is arranged in the receiving cavity and is used for buffering.

[0017] By adopting the above technical solution, the bottom plate and the arc-shaped plate respectively adapt to the surface of the turntable and the lower surface of the support plate, increasing the contact area with the turntable and the support plate, and the airbag can buffer when receiving an impact, so as to improve the buffering effect.

[0018] Optionally, the two ends of the two support plates close to the dividing head are connected to each other through a connecting assembly, and the connecting assembly includes: A connecting screw rod, which sequentially passes through the two support plates and is threadedly connected with a nut that abuts against the support plate for fixation; arc-shaped connecting grooves are formed on the two support plates; Two rotating half rings, which are respectively rotatably installed on the two connecting grooves and are spliced with each other and then pressed against the dividing head for positioning and are used to block debris from moving to the rotating connection between the dividing head and the turntable, and the dividing head rotates to drive the two rotating half rings to rotate on the two connecting grooves.

[0019] By adopting the above technical solution, the connecting screw rod passes through the two support plates and is fixed by a nut, so as to realize the fixed connection of the mutually abutted ends of the two support plates, improve the stability during the operation of the protection device, and improve the protection effect on the turntable.

[0020] At the same time, after the two rotating half-rings abut against each other, they are pressed against the dividing head for positioning. The rotation of the dividing head drives the two rotating half-rings to rotate. The two rotating half-rings can block debris from entering the rotating connection between the dividing head and the rotary table, thereby reducing the risk of damage to the dividing head. At the same time, the design of the two rotating half-rings can reduce the wear between the dividing head and the rotating half-rings during rotation, further improving the blocking effect on debris and improving the machining accuracy of the machine tool.

[0021] Optionally, a sealing ring is provided on the rotating half-ring and presses against the dividing head for sealing.

[0022] By adopting the above technical solution, the sealing ring further improves the blocking effect on debris.

[0023] Optionally, a replacement head is detachably installed at one end of the two support plates close to the dividing head, and the connecting groove is formed on the replacement head.

[0024] By adopting the above technical solution, the sizes of the dividing heads are different. Therefore, replacement heads with different-sized rotating half-rings can be installed according to needs, so that the size of the rotating half-ring is adapted to the size of the dividing head, thereby being able to block debris during the machining of dividing heads of different sizes, and further improving the machining accuracy of the machine tool.

[0025] Optionally, the rotating assembly includes: An arc-shaped slideway, which is arranged on the protective cover and is arc-shaped with its axis coinciding with the axis of the rotating shaft; A connecting body, which is arranged on the support plate and is rotatably installed on the arc-shaped slideway.

[0026] By adopting the above technical solution, the rotation of the support plate drives the connecting body to rotate on the arc-shaped slideway. At the same time, the setting of the connecting body can also further block debris from entering the gap between the mounting seat and the rotary table and contacting the rotating shaft, reducing the risk of damage to the rotating shaft and improving the machining accuracy of the machine tool.

[0027] Optionally, the support plate and the connecting body are connected by an elastic buffer assembly, and the elastic buffer assembly is used to buffer the acting force under the action of elastic force.

[0028] By adopting the above technical solution, the connection between the support plate and the connecting body is in a bent state. It is not convenient to connect directly. If this connection is made far from the rotary table, the strength is insufficient, resulting in easy damage here after being impacted, which will reduce the protection effect on the rotary table. By connecting with an elastic buffer assembly, when impacted, buffering can be achieved through the elastic force, thereby further improving the protection effect on the rotary table and improving the machining accuracy of the machine tool.

[0029] Optionally, the elastic buffer assembly includes: A first buffer plate rotatably mounted on the support plate; A moving block, which is inclined and slidably arranged on the connecting body and is located above the first buffer plate; A second buffer plate rotatably mounted on the moving block and rotatably connected to the first buffer plate; An elastic sheet is arranged on the support plate and the connecting body and abuts against the side walls of the first buffer plate and the second buffer plate close to the rotary table under the action of elastic force for positioning.

[0030] By adopting the above technical solution, when the first buffer plate and the second buffer plate are impacted, they push the first buffer plate and the second buffer plate to rotate. The rotation of the second buffer plate pulls the moving block to move for yielding. The elastic sheet buffers the impact force on the first buffer plate and the second buffer plate. At the same time, when the inclined moving block moves, the force will be decomposed into horizontal and vertical forces, thereby further reducing the force on the first buffer plate and the second buffer plate, improving the buffering effect on the impact force, enhancing the protection effect on the rotary table, and improving the machining accuracy of the machine tool.

[0031] In summary, the present application includes at least one of the following beneficial technical effects: 1. When replacing the workpiece, no matter where the workpiece falls, it collides with the support mechanism. The support mechanism can buffer the workpiece, reducing the damage to the rotary table. Moreover, the debris falls on the surface of the support mechanism and can fall outside the rotary table under the action of the coolant or gas used for cooling during the machining of the machine tool, thereby improving the machining accuracy of the machine tool and the convenience of debris cleaning.

[0032] 2. Since the rotation drive of the rotary table does not drive the protective cover to rotate, the orifice of the mounting hole is always located below the rotating shaft, reducing the risk that the debris contacts the rotating shaft through the mounting hole after the mounting hole rotates due to the rotation drive of the protective cover. Therefore, the protection effect on the rotary table is further improved, and the machining accuracy of the machine tool is further improved.

[0033] 3. Since the support plate is arched, it can better provide buffering force and facilitate the falling of debris. At the same time, through the design of the buffer member, it is possible to increase the contact area between the bottom of the buffer member and the surface of the rotary table as much as possible and the contact area between the top and the support plate as much as possible, thereby increasing the force-bearing area, further improving the support and buffering effect of the support plate, reducing the damage to the surface of the rotary table, improving the machining accuracy of the machine tool and the convenience of debris cleaning. Description of the Drawings

[0034] Figure 1 is a three-dimensional structural schematic diagram of the machine tool; Figure 2 is a structural schematic diagram of the workbench, mounting seat, dividing head, rotary table, and protective device in the machine tool; Figure 3 It is a schematic diagram of a partial structure of a machine tool; Figure 4 It is Figure 3 an enlarged schematic diagram of part A in Figure 5 It is Figure 3 an enlarged schematic diagram of part B in Figure 6 It is Figure 3 an enlarged schematic diagram of part C in

[0035] Reference signs: 1, machine body; 11, workbench; 12, mounting base; 13, dividing head; 2, rotary table; 21, mounting section; 22, connecting section; 23, rotating shaft; 24, mounting hole; 25, connecting arc surface; 3, protection device; 31, protective cover; 32, protection piece; 4, support mechanism; 41, support plate; 42, buffer cavity; 43, replacement head; 5, buffer member; 51, bottom plate; 52, arc-shaped plate; 53, airbag; 54, accommodation cavity; 6, positioning assembly; 61, first positioning plate; 62, second positioning plate; 7, connecting assembly; 71, connecting screw; 72, rotating semi-ring; 73, connecting plate; 8, rotating assembly; 81, arc-shaped slideway; 82, connecting body; 83, arc portion; 84, vertical portion; 85, buffer hole; 9, elastic buffer assembly; 91, first buffer plate; 92, moving block; 93, second buffer plate; 94, elastic piece. Detailed implementation manners

[0036] The following further elaborates on this application in detail.

[0037] An embodiment of this application discloses a five-axis gantry machine tool.

[0038] Referring to Figures 1 - 3 , the five-axis gantry machine tool includes a machine body 1, a workbench 11 arranged on the machine body 1, two mounting bases 12 arranged on the workbench 11, a rotary table 2 rotatably mounted on the two mounting bases 12 through a rotating shaft 23, a dividing head 13 rotatably mounted on the rotary table 2, and further includes a protection device 3 for protecting the rotary table 2.

[0039] The workbench 11 can move in two mutually perpendicular directions in the horizontal plane, namely the X direction and the Y direction. The driving structure is a motor lead screw nut structure. The workbench 11 is provided with a T-shaped mounting groove for fixedly mounting the mounting base 12. This structure is a prior art and will not be elaborated here. An elastic protection pad can be placed on the workbench 11 to reduce the damage caused by the workpiece to the workbench 11 and prevent debris from entering the mounting groove of the workbench 11, which also facilitates the cleaning of debris. The two mounting bases 12 are fixedly mounted on the workbench 11 at intervals along the length direction of the workbench 11 and are in a vertical state.

[0040] Referring to Figures 2 - 3The turntable 2 includes a horizontal mounting section 21 and connecting sections 22 located at both ends of the mounting section 21 and extending vertically upward to the top of the mounting section 21. The dividing head 13 is fixedly mounted at the middle position of the upper surface of the mounting section 21; the rotating shaft 23 is fixedly mounted on the opposite side walls of the two connecting sections 22 and is in a horizontal state. The two rotating shafts 23 are rotatably mounted on the side walls of the two mounting seats 12 on the opposite side. The top of the connecting section 22 is provided with an arc-shaped connecting arc surface 25 with the center located on the axis of the rotating shaft 23.

[0041] Reference Figures 3 - 4 The protective device 3 includes two protective covers 31, two protective sheets 32 and two supporting mechanisms 4. The two protective covers 31 are arranged in a one-to-one correspondence with the two rotating shafts 23. The top of the protective cover 31 is in an arc shape, and a mounting hole 24 for the rotating shaft 23 to pass through is opened at the bottom of the protective cover 31. The protective cover 31 is fixedly mounted on the side wall of the mounting seat 12 close to the turntable 2, and the protective cover 31 is located between the mounting seat 12 and the turntable 2; during installation, the protective cover 31 is placed vertically downward and the rotating shaft 23 passes through the mounting hole 24, and then the protective cover 31 is fixedly mounted on the mounting seat 12 by screws, and a gap is maintained between the protective cover 31 and the connecting section 22 for rotation, and the top of the protective cover 31 extends above the connecting section 22.

[0042] Two protective sheets 32 are fixedly mounted on the side walls of the two protective covers 31 on opposite sides, and the two protective sheets 32 extend above the two connecting sections 22. The protective sheets 32 are arc-shaped and are arranged concentrically with the connecting arc surface 25 and abut against the connecting arc surface 25, so as to prevent debris from contacting the rotating shaft 23. Two supporting mechanisms 4 are arranged on the mounting section 21 and one end of the two supporting mechanisms 4 is spliced ​​with each other to form a clearance hole for the dividing head 13 to pass through, and the other end of the two supporting mechanisms 4 is rotatably connected to the protective cover 31 through the rotating assembly 8.

[0043] The supporting mechanism 4 includes a supporting plate 41, the supporting plate 41 and the mounting section 21 are parallel in length direction, the lower surface of the supporting plate 41 abuts against the upper surface of the mounting section 21 for positioning, and the cross-section of the supporting plate 41 along the length direction of the mounting section 21 is arched; the clearance hole is formed by abutting and splicing one end of two supporting plates 41 against each other, and the axes of the clearance hole and the dividing head 13 coincide and the diameter is greater than or equal to the outer diameter of the dividing head 13.

[0044] Reference Figure 3 , Figure 5 The two support plates 41 are connected to each other at one end near the dividing head 13 through a connecting assembly 7. A replacement head 43 is detachably installed at one end of the support plate 41 near the dividing head 13. A support block that is snap-fitted to the support plate 41 is fixedly installed on the replacement head 43. An arc-shaped connecting groove is provided at one end of the replacement head 43 near the dividing head 13.

[0045] Both support plates 41 are provided with connecting plates 73 extending to both sides of the mounting section 21. The connecting assembly 7 includes a connecting screw 71 and two rotating half rings 72. Two connecting screws 71 are provided and are located on both sides of the mounting section 21. The connecting screw 71 passes through the two connecting plates 73 and is threadedly connected with a nut that rests on the connecting plate 73 for positioning, thereby achieving the fixation of the two support plates 41.

[0046] The two rotating half rings 72 are rotatably installed on the two connecting grooves. A sealing ring made of rubber material is provided at one end of the rotating half ring 72 close to the dividing head 13. After the two support plates 41 are fixed, the two rotating half rings 72 and the two sealing rings are pressed against the dividing head 13, so as to prevent debris from entering the rotating connection between the dividing head 13 and the mounting section 21, and also prevent the support block from being separated from the support plate 41. The two support plates 41 can be removed to replace the replacement head 43. The replacement head 43 is provided with rotating half rings 72 of different sizes to adapt to dividing heads 13 of different sizes.

[0047] Reference Figure 3 , Figure 6 The support mechanism 4 also includes a buffer 5 and a positioning assembly 6. A buffer cavity 42 is formed between the lower surface of the support plate 41 and the mounting section 21. The buffer 5 is placed on the upper surface of the mounting section 21 and is located in the buffer cavity 42 for limiting position. The buffer 5 buffers the force acting on the support plate 41.

[0048] The buffer 5 includes a bottom plate 51, an arc plate 52 and an airbag 53. The bottom plate 51 is in a horizontal state and is placed on the upper surface of the mounting section 21. The arc plate 52 is fixedly mounted on the upper surface of the bottom plate 51 and is arc-shaped. The arc plate 52 is closely attached to the lower surface of the support plate 41 for positioning. An accommodating cavity 54 is formed between the arc plate 52 and the bottom plate 51. The airbag 53 is fixedly mounted in the accommodating cavity 54 and is used for buffering. The design of the arc plate 52 and the bottom plate 51 not only meets the buffering requirements but also increases the contact area with the mounting section 21 and the support plate 41, thereby improving the buffering effect.

[0049] The positioning assembly 6 includes two positioning plates 1 61 and two positioning plates 2 62. The two positioning plates 1 61 are fixedly mounted on the support plate 41 and are located on both sides of the mounting section 21. The two positioning plates 1 61 are pressed against the opposite side walls of the mounting section 21 for positioning, and the bottom ends of the two positioning plates 1 61 are flush with the lower surface of the mounting section 21; the two positioning plates 2 62 are fixedly mounted on the bottom of the positioning plate 1 61 by positioning screws, and the two positioning plates 2 62 are pressed against the side wall of the mounting section 21 on the side away from the support plate 41, i.e., the lower surface of the mounting section 21 for positioning, and the positioning screws vertically pass through the lower surface of the positioning plate 2 62 and are threadedly connected to the positioning plate 1 61.

[0050] Reference Figure 3 , Figure 4, the rotating assembly 8 includes an arc-shaped slideway 81 and a connecting body 82. The arc-shaped slideway 81 is fixedly installed on the side wall of the protective cover 31 close to the rotary table 2 and above the protective piece 32. The arc-shaped slideway 81 is arc-shaped and its center of the circle is located on the axis of the rotating shaft 23; the connecting body 82 is rotatably installed on the arc-shaped slideway 81 and extends obliquely downward to near the installation section 21. The connecting body 82 includes an arc part 83 and a vertical part 84. The arc part 83 is arc-shaped and is located on the side of the protective piece 32 away from the connecting arc surface 25. The arc part 83 and the protective piece 32 are concentrically arranged; the vertical part 84 is arranged parallel to the connecting section 22.

[0051] The bottom end of the vertical part 84 is connected to one end of the support plate 41 close to the vertical part 84 through an elastic buffer assembly 9. The elastic buffer assembly 9 is used to buffer the acting force under the action of elastic force; the elastic buffer assembly 9 includes a first buffer plate 91, a moving block 92, a second buffer plate 93 and an elastic piece 94. The vertical part 84 is located above the support plate 41. The first buffer plate 91 is rotatably installed at one end of the support plate 41 close to the vertical part 84 and is arranged obliquely upward. An inclined buffer hole 85 is opened at the bottom of the vertical part 84. The moving block 92 is slidably installed and is rotationally connected to the first buffer plate 91. The rotational directions of the first buffer plate 91 and the second buffer plate 93 are parallel and in a horizontal state everywhere.

[0052] Both ends of the elastic piece 94 are fixedly installed on the bottom end of the vertical part 84 and one end of the support plate 41 close to the vertical part 84 through screws, and the elastic piece 94 is pressed against the side walls of the first buffer plate 91 and the second buffer plate 93 close to the rotary table 2 under the action of elastic force for positioning. After the outer surfaces of the first buffer plate 91 and the second buffer plate 93 receive the acting force, they rotate, thereby pushing the elastic piece 94 to rotate for buffering. At the same time, when the second buffer plate 93 rotates, it pulls the moving block 92 to move on the buffer hole 85. Since the moving block 92 slides obliquely, the acting force received by the second buffer plate 93 can be decomposed into two forces, a horizontal force and a vertical force, so as to reduce the acting force received by the elastic piece 94 and improve the buffering effect.

[0053] The working principle of the embodiment of the present application is as follows: Fix two protective covers 31 on two mounting seats 12, and make two rotating shafts 23 pass through two mounting holes 24. At the same time, make two protective pieces 32 abut against the connecting arc surface 25 to prevent debris from contacting the rotating shaft 23. Place the buffer member 5 on the mounting section 21, and install two replacement heads 43 on the opposite ends of two support plates 41. The two replacement heads 43 are spliced to form a relief hole for the indexing head 13 to pass through. Pass the connecting screw 71 through two connecting plates 73 and then fix it with a nut, so that the two rotating half rings 72 and the sealing ring are pressed against the indexing head 13 for positioning. Then fix the second positioning plate 62 on the first positioning plate 61, so that the support plate 41 abuts against the mounting section 21 to form a buffer cavity 42 for placing the buffer member 5. Rotate and install the arc portion 83 on the arc-shaped slideway 81, thus completing the installation of the protection device 3.

[0054] Place a protective pad on the workbench 11. When the machine tool is running, the workpiece is clamped on the indexing head 13 for processing. When replacing the workpiece, no matter where the workpiece falls on the mounting section 21, it can be buffered through the cooperation of the support plate 41 and the buffer member 5. At the same time, when debris falls on the support plate 41, the arched support plate 41 can make the debris more likely to fall onto the protective pad. When debris falls on the protective cover 31, it can also fall onto the protective pad in time, thereby improving the machining accuracy of the machine tool and the convenience during debris cleaning.

[0055] When the outer surfaces of the first buffer plate 91 and the second buffer plate 93 receive a force, they rotate, thereby pushing the elastic piece 94 to rotate for buffering. At the same time, when the second buffer plate 93 rotates, it pulls the moving block 92 to move on the buffer hole 85. Since the moving block 92 slides obliquely, the force received by the second buffer plate 93 can be decomposed into two forces, horizontal and vertical, thereby reducing the force received by the elastic piece 94, improving the buffering effect, and improving the machining accuracy of the machine tool.

[0056] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A five-axis gantry machine tool, characterized in that: The invention comprises a machine body (1), a workbench (11), two mounting seats (12) arranged on the workbench (11), a turntable (2) rotatably mounted on the two mounting seats (12) via a rotating shaft (23), and a dividing head (13) rotatably mounted on the turntable (2), and also comprises a protective device (3) for protecting the turntable (2), wherein the protective device (3) comprises: Two protective covers (31) are detachably mounted on the two mounting seats (12) and are provided with mounting holes (24) for the rotating shaft (23) to pass through; Two protective sheets (32) are arranged on the two protective covers (31) and abut against the turntable (2) and are used to prevent debris from contacting the rotating shaft (23); Two support mechanisms (4) are arranged on the turntable (2) and are spliced ​​together at one end to form a clearance hole for the indexing head (13) to pass through, while the other ends are rotatably connected to the two protective covers (31) respectively through a rotating assembly (8). The two support mechanisms (4) and the two protective covers (31) can cover and protect the turntable (2).

2. A five-axis gantry machine tool according to claim 1, characterized in that: The supporting mechanism (4) comprises: The support plate (41) is against the turntable (2) and is in an arched shape, the clearance hole is formed by two support plates (41) being against each other and spliced ​​together, and the support plate (41) and the turntable (2) cooperate to form a buffer cavity (42) for buffering; A buffer member (5) is placed on the support plate (41) and is located in the buffer cavity (42) and is used to buffer the force applied to the support plate (41); A positioning assembly (6) is arranged on the support plate (41) and is connected to the turntable (2) for positioning and for limiting the position of the buffer member (5).

3. A five-axis gantry machine tool according to claim 2, characterized in that: The positioning component (6) comprises: Two positioning plates (61) are arranged on the support plate (41) and are located on both sides of the turntable (2); The two second positioning plates (62) are arranged on the first positioning plate (61) by means of positioning screws and are pressed against the side wall of the turntable (2) away from the support plate (41) for positioning.

4. A five-axis gantry machine tool according to claim 2, characterized in that: The buffer member (5) comprises: A bottom plate (51) rests on the turntable (2); an arc-shaped plate (52) disposed on the bottom plate (51) and in an arc shape, and forming a receiving cavity (54) with the bottom plate (51); the arc-shaped plate (52) is elastic and closely attached to the support plate (41) for support and buffering; The airbag (53) is arranged in the accommodating cavity (54) and is used for buffering.

5. A five-axis gantry machine tool according to claim 2, characterized in that: The two support plates (41) are connected to each other at one end close to the dividing head (13) via a connecting assembly (7), and the connecting assembly (7) comprises: A connecting screw (71) passes through the two support plates (41) in sequence and is threadedly connected to a nut that rests on the support plates (41) for fixing; an arc-shaped connecting groove is formed on the two support plates (41); The two rotating half rings (72) are respectively rotatably mounted on the two connecting grooves and are pressed against the dividing head (13) after being spliced ​​together for positioning and for preventing debris from moving to the rotational connection between the dividing head (13) and the turntable (2). The dividing head (13) rotates to drive the two rotating half rings (72) to rotate on the two connecting grooves.

6. A five-axis gantry machine tool according to claim 5, characterized in that: The rotating half ring (72) is provided with a sealing ring which presses against the dividing head (13) for sealing.

7. A five-axis gantry machine tool according to claim 5, characterized in that: A replacement head (43) is detachably mounted on one end of the two support plates (41) close to the dividing head (13), and the connection groove is provided on the replacement head (43).

8. The five-axis gantry machine tool according to claim 2, characterized in that: The rotating assembly (8) comprises: An arc-shaped slideway (81) is disposed on the protective cover (31) and is arc-shaped so that its axis coincides with the axis of the rotating shaft (23); The connecting body (82) is arranged on the supporting plate (41) and is rotatably mounted on the arc-shaped slideway (81).

9. A five-axis gantry machine tool according to claim 8, characterized in that: The support plate (41) and the connecting body (82) are connected via an elastic buffer component (9), and the elastic buffer component (9) is used to buffer the acting force under the action of elastic force.

10. A five-axis gantry machine tool according to claim 9, characterized in that: The elastic buffer component (9) comprises: A buffer plate (91) is rotatably mounted on the support plate (41); A moving block (92) is obliquely and slidably disposed on the connecting body (82) and is located above the buffer plate 1 (91); The second buffer plate (93) is rotatably mounted on the moving block (92) and is rotatably connected to the first buffer plate (91); The elastic sheet (94) is arranged on the support plate (41) and the connecting body (82) and, under the action of elastic force, abuts against the side wall of the buffer plate 1 (91) and the buffer plate 2 (93) on the side close to the turntable (2) for positioning.

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