Closed gantry machining center

Abstract

The present invention relates to the technical field of gantry machining centers, specifically to a closed gantry machining center, including a load-bearing mechanism, a traction mechanism, and a clamping mechanism, wherein the load-bearing mechanism includes a chassis assembled on the closed gantry machining center, a load-bearing column mounted on the bottom of the chassis, two auxiliary rollers movably mounted inside the chassis, and a positioning slide movably mounted on the chassis. By setting a plurality of first boosting blocks that can perform circumferential boosting and clamping against the inner concave holes of the circular workpiece master, and installing a second boosting block distributed in the same direction on the first boosting block, and installing a core barrel for limiting constraint and load-bearing at the inner end of the first boosting block, combined with the elastic traction of the spring on the first boosting block, and the lateral stretching and guiding of the second boosting block by the pull rod, when the adjusting rocker is rotated and pushed clockwise, the spiral push rod can be retracted inward along the threaded groove of the inner cavity of the core barrel, thereby enabling the circular workpiece master to be effectively adapted for boosting and clamping.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry machining centers, in particular to a closed gantry machining center. Background Art

[0002] A gantry machining center is a machining center in which the spindle axis is perpendicular to the worktable. The overall structure is a portal frame consisting of double columns and a top beam with a crossbeam in the middle. It is particularly suitable for processing large workpieces and workpieces with complex shapes. The difference between a closed gantry machining center and a traditional open gantry machining center is that the closed gantry machining center has a sealed chassis shell.

[0003] When a closed gantry machining center processes workpiece masterbatch, it is difficult for the operator to observe the operating status of the cutting mechanism inside the gantry machining center in real time due to the obstruction of its external chassis shell. At the same time, the chassis shell in a closed state has a certain obstructive effect on the processing of workpiece masterbatch, especially when processing circular workpiece masterbatch. Since most circular workpieces require standardized cutting processing, it is difficult for the closed gantry machining center to adjust the circular workpiece in time for fine-tuning of all-round angles.

[0004] As shown above, how to solve the problem of fine-tuning the closed gantry machining center to perform all-around machining on the clamped circular workpiece masterbatch is the technical difficulty that the present invention needs to solve. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] The closed gantry machining center includes a load-bearing mechanism, a traction mechanism and a clamping mechanism, wherein the load-bearing mechanism includes a chassis mounted on the closed gantry machining center, a load-bearing column installed at the bottom of the chassis, two auxiliary rollers movably installed inside the chassis, a positioning slide movably installed on the chassis, an exhaust box installed on the positioning slide, a positioning frame installed in the middle of the exhaust box cavity, a turbine shaft movably installed in the middle of the positioning frame, a transmission guide rod connected to the inside of the positioning slide, and a cross chain engaged with the transmission guide rod and the outside of the auxiliary roller, the traction mechanism includes a beam movably installed in the middle of the chassis, a limiting sliding shaft installed on the beam, a positioning plug movably installed outside the limiting sliding shaft, a connecting rod installed in the middle of the beam and located in the chassis A movable sliding roller, a traction rod installed inside the beam, and a hydraulic part movably installed in the traction rod and extending to the outside of the beam. The clamping mechanism includes a deflection assembly movably connected to the inner end of the beam, a tension spring assembly connected to the deflection assembly, a spiral push rod movably installed on one end of the tension spring assembly, a core tube threadedly connected to the outside of the spiral push rod, a plurality of first boosting blocks movably installed outside the core tube, a spring connected to the first boosting block, a second boosting block installed on the first boosting block, a rocker installed at the other end of the spiral push rod, and a positioning plate movably connected to the outside of the rocker. The deflection assembly includes a horizontal load-bearing base, a guide installed on the outside of the load-bearing base, and a plurality of pull rods evenly installed on the outside of the load-bearing base and distributed in a circle.

[0008] In a preferred example, the present invention can be further configured as follows: the positioning slide is composed of a bent limit slot plate and a cross tube installed on one side of the limit slot plate, and the slot opened between the limit slot plate and the cross tube is adapted to the guide rod on one side of the transmission guide rod.

[0009] By adopting the above technical solution, two horizontal slide grooves are opened in the chassis, and the two slide grooves on the chassis are combined to limit the transmission guide rod. At the same time, the freely stretchable and expandable positioning slide is used to horizontally constrain the transmission guide rod, and the transmission of the transmission guide rod by the cross chain is combined, so that the structure can be safe when used.

[0010] In a preferred example, the present invention can be further configured as follows: the exhaust box is a truncated cone structure as a whole, and the inner end and the middle of the exhaust box are provided with symmetrically distributed circular air holes. At the same time, the turbine shaft is composed of fan blades, a cross bar and a gear installed at one end of the cross bar, and the middle of the cross bar is provided with a ring groove adapted to be constrained by the positioning frame.

[0011] By adopting the above technical solution, the turbine shaft is movably installed in the annular fastener in the middle of the positioning frame, and the positioning frame is used to suspend the turbine shaft in the inner cavity of the exhaust box. When the outer end gear of the turbine shaft is meshed with the deflection gear in the transmission guide rod, the circulating airflow generated by the high-speed rotation of the turbine shaft can be horizontally blown and temperature controlled on both sides of the clamping mechanism.

[0012] In a preferred example, the present invention can be further configured as follows: a circular raised end is provided at the inner end of the beam, and an inwardly recessed slot is provided inside the beam, and the circular raised end at the inner end of the beam is adapted to be clamped in the load-bearing base.

[0013] By adopting the above technical solution, the slots opened inside the beam are used to laterally constrain the traction rod and the hydraulic parts, and at the same time, the traction rod is used to laterally control the hydraulic parts, and the outer end of the hydraulic parts is used to make a movable connection between the guide parts. At this time, the deflection assembly as a whole can be conveniently pulled laterally by the hydraulic parts and the traction rod, thereby realizing the micro-angle adjustment of the entire clamping mechanism.

[0014] In a preferred example, the present invention can be further configured as follows: two rectangular transverse plates are provided in the annular notch on the outer side of the limiting sliding shaft, and the two rectangular transverse plates on the limiting sliding shaft are adapted to be constrained by the rectangular sliding groove on the inner side of the positioning insert.

[0015] By adopting the above technical solution, the two rectangular cross plates on the limiting sliding shaft are used to provide lateral constraints on the positioning insert. When the beam rotates as a whole, the operator can adjust the free assembly between the positioning insert and the chassis, thereby achieving stability after the chassis rotates, and at the same time facilitating all-round processing of the clamped circular workpiece.

[0016] In a preferred example, the present invention can be further configured as follows: the tension spring assembly is composed of a tension spring and a T-shaped end, and the T-shaped end is adapted to penetrate into the concave hole at one end of the spiral push rod.

[0017] By adopting the above technical solution, the tension spring and the T-shaped end in the tension spring assembly are used to respectively provide lateral traction between the weight-bearing base and the spiral push rod. When the spiral push rod rotates and spirally extends along the inside of the core tube, the tension spring and the T-shaped end in the tension spring assembly can apply lateral tensile force to the spiral push rod as a whole, thereby ensuring the stability of the spiral push rod after rotation.

[0018] In a preferred example, the present invention can be further configured as follows: arc-shaped rubber gaskets are installed on the outside of the first boost block and the second boost block, and a slider is provided at one end of the second boost block, and a load-bearing pad is provided at the other end of the first boost block.

[0019] By adopting the above technical solution, arc-shaped rubber gaskets are assembled on the outside of the first boosting block and the second boosting block for high-friction boosting and clamping of the circular workpiece masterbatch, and the load-bearing pad on the first boosting block is used to provide lateral support to the second boosting block. In this way, the multiple first boosting blocks and the second boosting blocks movably mounted on the core barrel can be expanded outward at constant pressure, so that different circular workpiece masterbatch can be adaptively clamped and fixed.

[0020] In a preferred example, the present invention can be further configured as follows: a plurality of circumferentially distributed insertion rods are provided on one side of the positioning plate, a dense circular hole is provided on the side of the core tube away from the deflection assembly, and the circular holes on one side of the core tube are adapted to fit the insertion rods.

[0021] By adopting the above technical solution, the insertion rod opened on one side of the adjustment positioning plate is adapted to connect with the circular hole on one side of the core tube. When the spiral push rod rotates, the multiple first boosting blocks pressurized and expanded by the spiral push rod are clamped and fixed against the circular workpiece for stability.

[0022] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0023] 1. The present invention provides a plurality of first boosting blocks that can perform circumferential boosting and clamping on the inner concave hole of the circular workpiece mother material, and installs second boosting blocks distributed in the same direction on the first boosting blocks, and installs a core tube for limiting constraint and load-bearing at the inner end of the first boosting block. Combined with the elastic traction of the spring on the first boosting block and the lateral stretching and guidance of the second boosting block by the pull rod, when the adjustment rocker is rotated clockwise and pushed, the spiral push rod can be retracted inward along the threaded groove of the inner cavity of the core tube, thereby enabling the circular workpiece mother material to be effectively adapted and boosted and clamped.

[0024] 2. The present invention movably installs a transverse beam in the U-shaped groove at the inner end of the load-bearing base, installs a transverse traction rod inside the beam, and movably installs a freely extendable hydraulic component inside the traction rod, combines the movable traction of the outer end of the hydraulic component toward the guide component, and cooperates with the positioning plug-in plate to perform lateral adjustment along the limiting sliding shaft, and combines the multiple triangular end columns on the inner side of the positioning plug-in plate to quickly position the chassis, so that the device can control the clamping mechanism as a whole to perform all-round angle fine-tuning processing on the pressurized clamped circular workpiece mother material.

[0025] 3. The present invention sets up a chassis, and opens laterally distributed slide rail force arms on both sides of the chassis, installs two positioning slides on the chassis, and movably installs a transverse transmission guide rod on the inner side of the positioning slide. At the same time, the deflection gear at the outer end of the transmission guide rod is engaged with the gear at the outer end of the turbine shaft, so that the fan blades at the inner end of the turbine shaft can laterally blow the circular workpiece mother material that is pressurized and clamped outside the clamping mechanism structure, thereby improving the temperature regulation during the processing of the circular workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an embodiment of the present invention;

[0027] Figure 2 A schematic bottom view of a side surface of an embodiment of the present invention;

[0028] Figure 3 A partial dispersion diagram and a cross-sectional diagram of an embodiment of the present invention;

[0029] Figure 4 An embodiment of the present invention Figure 1 Schematic diagram of the interior top view;

[0030] Figure 5 An embodiment of the present invention Figure 4 Schematic diagram of local dispersion;

[0031] Figure 6 An embodiment of the present invention Figure 4 Schematic diagram of the internal dispersion of

[0032] Figure 7 An embodiment of the present invention Figure 6 Schematic diagram of the internal dispersion of

[0033] Figure 8 An embodiment of the present invention Figure 7 Schematic side view from above.

[0034] Reference numerals:

[0035] 100, load-bearing mechanism; 110, chassis; 120, load-bearing column; 130, auxiliary roller; 140, positioning slide; 150, exhaust box; 160, positioning frame; 170, turbine shaft; 180, transmission guide rod; 190, cross chain;

[0036] 200, traction mechanism; 210, beam; 220, limited sliding shaft; 230, positioning insert; 240, linkage sliding roller; 250, traction rod; 260, hydraulic components;

[0037] 300. Clamping mechanism; 310. Deflection assembly; 311. Weight-bearing base; 312. Guide; 313. Pull rod; 320. Extension spring assembly; 330. Screw push rod; 340. Core barrel; 350. First booster block; 360. Spring; 370. Second booster block; 380. Positioning plate; 390. Rocker. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0039] The following describes a closed gantry machining center provided by some embodiments of the present invention with reference to the accompanying drawings.

[0040] Example 1:

[0041] Combine Figures 1-8 As shown, the closed gantry machining center provided by the present invention includes a load-bearing mechanism 100 , a traction mechanism 200 and a clamping mechanism 300 . The traction mechanism 200 is installed in the load-bearing mechanism 100 , and the clamping mechanism 300 is installed on the traction mechanism 200 .

[0042] The load-bearing mechanism 100 includes a chassis 110, a load-bearing column 120, an auxiliary roller 130, a positioning slide 140, an exhaust box 150, a positioning frame 160, a turbine shaft 170, a transmission guide rod 180 and a cross chain 190. The traction mechanism 200 includes a beam 210, a limiting slide 220, a positioning plug-in disk 230, a linkage roller 240, a traction rod 250 and a hydraulic component 260. The clamping mechanism 300 includes a deflection assembly 310, a tension spring assembly 320, a screw push rod 330, a core barrel 340, a first booster block 350, a spring 360, a second booster block 370, a positioning plate 380 and a rocker 390, and the deflection assembly 310 also includes a load-bearing base 311, a guide 312 and a pull rod 313.

[0043] Specifically, the load-bearing column 120 is installed at the bottom of the chassis 110, the two auxiliary rollers 130 are movably installed inside the chassis 110, the positioning slide 140 is movably installed on the chassis 110, the exhaust box 150 is installed on the positioning slide 140, the positioning frame 160 is installed in the middle of the inner cavity of the exhaust box 150, the turbine shaft 170 is movably installed in the middle of the positioning frame 160, the transmission guide rod 180 is connected to the inside of the positioning slide 140, the cross chain 190 is engaged with the transmission guide rod 180 and the outside of the auxiliary roller 130, the beam 210 is movably installed in the middle of the chassis 110, the limiting slide 220 is installed on the beam 210, the positioning insert 230 is movably installed outside the limiting slide 220, the linkage slide roller 240 is installed in the middle of the beam 210 and is located in the chassis 110, and the traction rod 250 is installed on the beam 2 10, the hydraulic component 260 is movably installed in the traction rod 250 and extends to the outside of the beam rod 210, the deflection assembly 310 is movably connected to the inner end of the beam rod 210, the tension spring assembly 320 is connected to the deflection assembly 310, the spiral push rod 330 is movably installed on one end of the tension spring assembly 320, the core tube 340 is threadedly connected to the outside of the spiral push rod 330, multiple first boosting blocks 350 are movably installed on the outside of the core tube 340, the spring 360 is connected to the first boosting block 350, the second boosting block 370 is installed on the first boosting block 350, the rocker 390 is installed at the other end of the spiral push rod 330, the positioning plate 380 is movably connected to the outside of the rocker 390, the guide 312 is installed on the outside of the load-bearing base 311, and multiple pull rods 313 are evenly installed on the outside of the load-bearing base 311 and are distributed in a circle.

[0044] Two positioning slides 140 are installed on the chassis 110, and a horizontal transmission guide rod 180 is movably installed on the inner side of the positioning slide 140, and the outer end deflection gear of the transmission guide rod 180 is meshed with the outer end gear of the turbine shaft 170, and a horizontal traction rod 250 is installed inside the beam 210, and a freely extendable hydraulic component 260 is movably installed inside the traction rod 250, combined with the outer end of the hydraulic component 260 to move the guide member 312, and at the same time cooperate with the positioning plug 230 to perform lateral adjustment along the limiting sliding shaft 220, combined with the inner multiple of the positioning plug 230. The triangular end columns are used to quickly position the chassis 110, and at the same time, a second boost block 370 distributed in the same direction is installed on the first boost block 350, and a core tube 340 for limiting constraint and load-bearing is installed at the inner end of the first boost block 350. Combined with the elastic traction of the spring 360 on the first boost block 350, and the lateral stretching and guidance of the second boost block 370 by the pull rod 313, when the adjustment rocker 390 is rotated clockwise, the spiral push rod 330 can be retracted inward along the threaded groove of the inner cavity of the core tube 340, so that the circular workpiece masterbatch can be effectively adapted to the boost clamping.

[0045] Example 2:

[0046] Combine Figure 3 As shown, on the basis of Example 1, the positioning slide 140 is composed of a bent limit slot plate and a cross tube installed on one side of the limit slot plate, and the slot opened between the limit slot plate and the cross tube is adapted to the guide rod on one side of the transmission guide rod 180. The exhaust box 150 is a truncated cone structure as a whole, and the inner end and the middle of the exhaust box 150 are provided with symmetrically distributed circular air holes. At the same time, the turbine shaft 170 is composed of fan blades, a cross bar and a gear installed at one end of the cross bar, and the middle of the cross bar is provided with an annular groove adapted to be constrained by the positioning frame 160.

[0047] By opening two horizontal grooves in the chassis 110, and combining the two grooves on the chassis 110 to limit the transmission guide rod 180, and at the same time cooperating with the freely stretchable and expandable positioning slide 140 to lateral constrain the transmission guide rod 180, combined with the transmission of the transmission guide rod 180 by the cross chain 190, and cooperating with the positioning frame 160 to suspend the turbine shaft 170 in the inner cavity of the exhaust box 150, when the outer end gear of the turbine shaft 170 is meshed with the deflection gear in the transmission guide rod 180, the circulating airflow generated by the high-speed rotation of the turbine shaft 170 can be horizontally blown and temperature-controlled on both sides of the clamping mechanism 300.

[0048] Example 3:

[0049] Combine Figure 5 and Figure 6As shown, on the basis of embodiment one, a circular raised end is provided at the inner end of the beam 210, and an inwardly recessed slot is provided inside the beam 210. The circular raised end at the inner end of the beam 210 is adapted to be clamped in the load-bearing base 311, and two rectangular cross plates are provided in the annular groove on the outer side of the limiting slide 220, and the two rectangular cross plates on the limiting slide 220 are adapted to be constrained in the rectangular slide groove on the inner side of the positioning plug 230.

[0050] By utilizing the slots opened inside the beam 210 to provide lateral constraints on the traction rod 250 and the hydraulic component 260, combined with the lateral control of the traction rod 250 over the hydraulic component 260, and cooperating with the movable connection between the outer end of the hydraulic component 260 and the guide component 312, the deflection assembly 310 as a whole can be conveniently pulled laterally by the hydraulic component 260 and the traction rod 250, thereby realizing the overall micro-angle adjustment of the clamping mechanism 300. When the beam 210 as a whole rotates, the operator can adjust the free assembly between the positioning disk 230 and the chassis 110, thereby realizing the stability of the chassis 110 after rotation, and at the same time can facilitate the all-round processing of the clamped circular workpiece.

[0051] Example 4:

[0052] Combine Figure 6-Figure 8 As shown, on the basis of Example 1, the tension spring assembly 320 is composed of a tension spring and a T-shaped end, and the T-shaped end is adapted to pass through the recessed hole at one end of the spiral push rod 330, and arc-shaped rubber gaskets are installed on the outside of the first booster block 350 and the second booster block 370, and a slider is provided at one end of the second booster block 370, and a load-bearing pad is provided at the other end of the first booster block 350, and a plurality of circumferentially distributed plug rods are provided on one side of the positioning plate 380, and dense circular holes are provided on the side of the core tube 340 away from the deflection assembly 310, and the circular holes on one side of the core tube 340 are adapted to the plug rods.

[0053] The tension spring and the T-shaped end of the tension spring assembly 320 are used to pull the weight base 311 and the screw push rod 330 horizontally. When the screw push rod 330 rotates and stretches along the inner part of the core tube 340, the tension spring and the T-shaped end of the tension spring assembly 320 can apply a horizontal tensile force to the screw push rod 330 as a whole, and cooperate with the load-bearing pad on the first booster block 350 to support the second booster block 370 horizontally, so that the movable assembly on the core tube 340 can be The multiple first boosting blocks 350 and the second boosting blocks 370 can expand outward at a constant pressure, and at the same time, the insertion rod opened on one side of the adjustment positioning plate 380 is adapted to connect with the circular hole on one side of the core tube 340. When the screw push rod 330 rotates, the multiple first boosting blocks 350 that are pressurized and expanded by the screw push rod 330 are stable after being clamped and fixed against the circular workpiece, so that different circular workpiece master materials can be adaptively clamped and fixed, thereby ensuring the stability of the screw push rod 330 after rotation.

[0054] The working principle and use process of the present invention are as follows: the operator needs to pre-adjust the rocker 390 to rotate counterclockwise. At this time, the rocker 390 will drive the screw push rod 330 to extend outward along the threaded concave hole inside the tension spring assembly 320. At this time, the multiple first booster blocks 350 distributed in a circle will be subjected to the reverse tension of the spring 360 and shrink toward the inside of the core tube 340. At the same time, the second booster block 370 installed on the first booster block 350 will also shrink along with the first booster block 350. At this time, the second booster block 370 It will be positioned and moved laterally along with the outside of the pull rod 313. Then the operator needs to place the circular workpiece masterbatch outside the multiple first boosting blocks 350 and the second boosting blocks 370 distributed in a circular pattern, and then control the rocker 390 to rotate clockwise again until the positioning plate 380 drives the truncated cone-shaped threaded end at the inner end of the spiral push rod 330 to pressurize and expand outward against the multiple first boosting blocks 350, until the multiple first boosting blocks 350 and the second boosting blocks 370 are adaptively tightened and clamped against the inner wall of the circular workpiece masterbatch. During use, When the circular workpiece masterbatch needs to be partially cut on the side, the operator can control the traction rod 250 to push the hydraulic component 260 to stretch it horizontally. At this time, the load-bearing base 311 movably connected to the outer end of the hydraulic component 260 can fine-tune the local angle in the vertical direction, and at the same time, the positioning insert 230 is taken out to realize the overall circumferential state of the beam 210 to rotate, so that the clamping mechanism 300 can drive the clamped circular workpiece to perform all-round angle fine-tuning processing, and at the same time, the external drive is used. The moving device drives an auxiliary roller 130 movably installed inside the chassis 110. At this time, the auxiliary roller 130 will drive the cross chain 190 for continuous transmission. Driven by the cross chain 190, the two transmission guide rods 180 movably assembled on the chassis 110 can drive the turbine shaft 170 to rotate at high speed. At this time, the deflection gear with a larger diameter at the outer end of the transmission guide rod 180 will engage with the gear with a smaller diameter at the outer end of the turbine shaft 170 for high-efficiency rotation, and perform horizontal blowing operations on both sides of the clamping mechanism 300.

[0055] Although the 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 invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. Closed gantry machining center, characterized by: It comprises a load-bearing mechanism (100), a traction mechanism (200) and a clamping mechanism (300); The load-bearing mechanism (100) comprises a chassis (110) mounted on a closed gantry machining center, a load-bearing column (120) mounted on the bottom of the chassis (110), two auxiliary rollers (130) movably mounted inside the chassis (110), a positioning slide (140) movably mounted on the chassis (110), an exhaust box (150) mounted on the positioning slide (140), a positioning frame (160) mounted in the middle of the inner cavity of the exhaust box (150), a turbine shaft (170) movably mounted in the middle of the positioning frame (160), a transmission guide rod (180) connected to the inside of the positioning slide (140), and a cross chain (190) engaged with the transmission guide rod (180) and the outside of the auxiliary rollers (130); The traction mechanism (200) is installed on the load-bearing mechanism (100), and comprises a beam (210) movably installed in the middle of the chassis (110), a limiting sliding shaft (220) installed on the beam (210), a positioning insert (230) movably installed outside the limiting sliding shaft (220), a linkage sliding roller (240) installed in the middle of the beam (210) and located inside the chassis (110), a traction rod (250) installed inside the beam (210), and a hydraulic component (260) movably installed in the traction rod (250) and extending outside the beam (210); The clamping mechanism (300) is installed on the traction mechanism (200), and includes a deflection assembly (310) movably connected to the inner end of the beam (210), a tension spring assembly (320) connected to the deflection assembly (310), a spiral push rod (330) movably installed on one end of the tension spring assembly (320), a core barrel (340) threadedly connected to the outside of the spiral push rod (330), a plurality of first boosting blocks (350) movably installed outside the core barrel (340), a spring (360) connected to the first boosting block (350), a second boosting block (370) installed on the first boosting block (350), a rocker (390) installed at the other end of the spiral push rod (330), and a positioning plate (380) movably connected to the outside of the rocker (390); The deflection assembly (310) includes a horizontally placed weight-bearing base (311), a guide member (312) installed outside the weight-bearing base (311), and a plurality of pull rods (313) evenly installed outside the weight-bearing base (311) and distributed in a circumferential manner.

2. The closed gantry machining center according to claim 1, characterized in that: The positioning slide (140) is composed of a bent limiting slot plate and a transverse tube installed on one side of the limiting slot plate, and a notch opened between the limiting slot plate and the transverse tube is adapted to fit the guide rod on one side of the transmission guide rod (180).

3. The closed gantry machining center according to claim 1, characterized in that: The exhaust box (150) is in a truncated cone-shaped structure as a whole, and circular air holes are symmetrically distributed at the inner end and the middle of the exhaust box (150).

4. The closed gantry machining center according to claim 1, characterized in that: The turbine shaft (170) is composed of a fan blade, a crossbar, and a gear mounted on one end of the crossbar, and a ring groove adapted to be constrained by the positioning frame (160) is provided in the middle of the crossbar.

5. The closed gantry machining center according to claim 1, characterized in that: The inner end of the beam (210) is provided with a circular raised end, and the interior of the beam (210) is provided with an inwardly recessed slot, and the circular raised end at the inner end of the beam (210) is adapted to be clamped in the load-bearing base (311).

6. The closed gantry machining center according to claim 1, characterized in that: Two rectangular transverse plates are provided in the annular notch on the outer side of the limiting sliding shaft (220), and the two rectangular transverse plates on the limiting sliding shaft (220) are adapted to be constrained in the rectangular sliding groove on the inner side of the positioning insert (230).

7. The closed gantry machining center according to claim 1, characterized in that: The tension spring assembly (320) is composed of a tension spring and a T-shaped end, and the T-shaped end is adapted to penetrate into a concave hole at one end of the spiral push rod (330).

8. The closed gantry machining center according to claim 1, characterized in that: Arc-shaped rubber gaskets are installed on the outside of the first boosting block (350) and the second boosting block (370), and a slider is provided at one end of the second boosting block (370), while a load-bearing pad is provided at the other end of the first boosting block (350).

9. The closed gantry machining center according to claim 1, characterized in that: A plurality of circumferentially distributed insertion rods are provided on one side of the positioning plate (380), and dense circular holes are provided on the side of the core barrel (340) away from the deflection assembly (310), and the circular holes on one side of the core barrel (340) are adapted to fit the insertion rods.

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