A gantry machine tool for machining large mechanical equipment

Abstract

The application relates to the technical field of gantry machine tools, and discloses a gantry machine tool for machining large mechanical equipment, which comprises a bed slide rail, a workbench is arranged between the bed slide rails, the workbench is in a cross-shaped structure, a group of driving guide rails are fixedly arranged on the left and right sides of the transverse gap of the cross-shaped structure, movable supports are movably connected to the driving guide rails, a connecting rod extending to the outside of the movable support is movably connected to the inside of the movable support, a pressure ring sleeve is fixedly sleeved on the middle part of the outer surface of the connecting rod and located in the inner cavity of the movable support, and the pressure ring sleeve and the right side of the inner cavity of the movable support are in transmission connection through elastic components movably sleeved on the outer surface of the connecting rod. The gantry machine tool for machining large mechanical equipment can utilize the rotation of the extrusion plate to generate extrusion action on the large workpiece placed on the workbench, so that the relative angle of the placement of the large workpiece is gradually adjusted.

Description

Technical Field

[0001] This application relates to the field of gantry machine tool technology, and in particular to a gantry machine tool for processing large mechanical equipment. Background Technology

[0002] The moving column gantry milling machine is a large machine tool with a relatively simple structure, high stability and rigidity. The worktable is placed on the ground to support large workpieces, thereby realizing the milling of planes or inclined surfaces of large workpieces and ensuring the corresponding machining accuracy requirements.

[0003] However, because the moving column gantry milling machine mainly processes large workpieces in terms of size and weight, it is difficult to position them on the worktable. Due to frictional resistance, large workpieces are difficult to move on the worktable, which makes the moving column gantry milling machine prone to large errors during tool setting due to the relative tilt of large workpieces. This also seriously affects the feed rate of the tool during milling, resulting in poor milling quality and accuracy for large workpieces on planes or inclined surfaces, and making it impossible to further improve the milling accuracy for large workpieces.

[0004] Therefore, there is an urgent need for a moving column gantry milling machine for large workpieces to solve the defects of the existing gantry milling machines in actual use. Summary of the Invention

[0005] This application proposes a gantry milling machine for large-scale mechanical equipment processing, which can automatically adjust the relative arrangement angle of large workpieces on the worktable. This results in high accuracy during tool setting and high quality and accuracy in milling large workpieces on planes or inclined surfaces. This addresses the problem that gantry milling machines primarily process large workpieces, leading to difficulties in positioning them on the worktable and frictional resistance making it difficult to move them. Consequently, tool setting is prone to significant errors due to the relative tilt of large workpieces, severely affecting the feed rate of the cutting tool during milling, and ultimately resulting in poor quality and accuracy in milling large workpieces on planes or inclined surfaces.

[0006] To achieve the above objectives, this application adopts the following technical solution: a gantry milling machine for large-scale mechanical equipment processing, comprising two sets of bed slide rails, and a worktable provided between the two sets of bed slide rails. The bottom end of the worktable is fixedly connected to the foundation structure. A movable column beam is movably connected to the top of the bed slide rails, and a slide saddle and a slide ram are provided on the movable column beam. An electric spindle is provided on the slide ram. The worktable has a cross-shaped structure, and a set of drive guide rails are fixedly installed on the left and right sides of the transverse gap of the cross-shaped structure. A movable bracket is movably connected to the drive guide rails. A connecting rod extending to the outside of the movable bracket is movably connected inside the movable bracket. A pressure ring is fixedly sleeved on the middle of the outer surface of the connecting rod and located in the inner cavity of the movable bracket. The pressure ring is connected to the right side of the inner cavity of the movable bracket via a transmission connection through an elastic component movably sleeved on the outer surface of the connecting rod. A pressing plate is pinned to the end of the connecting rod, and one side of the bottom end of the pressing plate is transmission connected to a hydraulic cylinder group pinned to one side of the top of the movable bracket.

[0007] Furthermore, the top of the workbench is provided with several sets of piezoelectric modules arranged in a linear row, and several sets of piezoelectric modules in the corresponding area are electrically connected to the drive rails at the corresponding positions.

[0008] Furthermore, the pressure ring sleeve has a rated pressure threshold inside and forms a feedback electrical connection with the hydraulic cylinder assembly.

[0009] Furthermore, in the initial state, the extrusion plate always remains tilted inward, and a pad made of rubber material is provided at the top of the extrusion plate.

[0010] Furthermore, the electric spindle includes a housing fixedly mounted on the slide, a hollow shaft movably connected inside the housing, an electromagnetic sleeve fixedly sleeved inside the hollow shaft, and a magnetic pressure block movably sleeved inside the electromagnetic sleeve. Meanwhile, a carbon brush electrically connected to the electromagnetic sleeve is fixedly sleeved at the bottom of the inner wall of the housing.

[0011] Furthermore, a set of first piezoelectric sheets is provided on the upper two sides of the outer surface of the hollow shaft, and a set of second piezoelectric sheets is provided on the lower side of its outer surface, and the first piezoelectric sheets, the second piezoelectric sheets and the electromagnetic sleeve form an electrical feedback connection.

[0012] Furthermore, the electromagnetic sleeve forms an electrical feedback connection with the drive component that controls the tilting of the electric spindle, and forms an AND logic gate.

[0013] This invention application has the following technical effects:

[0014] 1. The gantry milling machine tool for large-scale mechanical equipment processing provided in this application, with the setting of the movable support and its upper structure, can use the rotation of the extrusion plate to generate an extrusion action on the large workpiece placed on the worktable, so as to gradually correct the relative angle of its placement. After the large workpiece is corrected, as the extrusion plate continues to rotate and extrude, it can force the connecting rod to move to compress the elastic component to relieve the pressure on the hydraulic cylinder group. At the same time, under the continuous rotation and extrusion of the extrusion plate, the large workpiece placed on the worktable can be clamped, preventing it from moving during the milling process, thereby effectively improving the milling quality and accuracy of the large workpiece's plane or inclined surface.

[0015] 2. The gantry milling machine tool for large-scale mechanical equipment processing provided in this application, for the setting of the hollow shaft and its structure, when the electric spindle tilts to operate due to the machining of the inclined surface of a large workpiece, can trigger the electromagnetic sleeve according to the current signal fed back by the first piezoelectric plate and the second piezoelectric plate, so that it generates current of different intensities and forces the magnetic pressure block to move upward to a corresponding degree, so as to balance the centrifugal force of different intensities generated at the lower end of the hollow shaft when it tilts at different angles, thereby effectively alleviating the circular runout phenomenon generated by the hollow shaft when it tilts and rotates at high speed. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0017] This application can be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a top view of the structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the movable support and its structure according to the present invention;

[0021] Figure 4 This is a front view of the movable support structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the electric spindle of the present invention;

[0023] Figure 6 This is a front sectional view of the electric spindle structure of the present invention.

[0024] In the diagram: 1. Bed slide rail; 2. Worktable; 3. Moving column beam frame; 4. Drive guide rail; 5. Movable bracket; 6. Connecting rod; 7. Pressure ring sleeve; 8. Elastic component; 9. Extrusion plate; 10. Hydraulic cylinder group; 11. Outer shell; 12. Hollow shaft; 13. Electromagnetic sleeve; 14. First piezoelectric element; 15. Second piezoelectric element; 16. Magnetic pressure block; 17. Carbon brush; 18. Piezoelectric module. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] like Figure 1 As shown, a gantry milling machine for large-scale mechanical equipment processing includes two sets of bed slide rails 1 fixedly installed on a foundation structure, and a worktable 2 for carrying large workpieces is provided between the two sets of bed slide rails 1. The bottom end of the worktable 2 is fixedly connected to the foundation structure, and a movable column beam 3 is movably connected to the top of the bed slide rails 1, allowing the movable column beam 3 to move back and forth along the trajectory of the bed slide rails 1. The movable column beam 3 is equipped with a saddle that can move along the X-axis and a ram that can move along the Z-axis. An electric spindle is mounted on the ram, and under the action of the saddle and the ram, the electric spindle can be moved to the corresponding position to perform milling operations on the large workpiece carried on the worktable 2. Figure 3 , Figure 4 As shown, the workbench 2 has a cross-shaped structure, and a set of drive guide rails 4 are fixedly installed on the left and right sides of the horizontal gap of the cross-shaped structure. A movable bracket 5 is movably connected to the drive guide rail 4. Under the action of the drive guide rail 4, the movable bracket 5 can be driven to move left and right along its trajectory to move the movable bracket 5 to a position close to the large workpiece carried on the workbench 2. It can be used for large workpieces of different sizes. A connecting rod 6 extending to the outside of the movable bracket 5 is movably connected inside the movable bracket 5. A pressure ring 7 is fixedly sleeved in the middle of the outer surface of the connecting rod 6 and located in the inner cavity of the movable bracket 5. The pressure ring 7 and the right side of the inner cavity of the movable bracket 5 are connected by a transmission component 8 movably sleeved on the outer surface of the connecting rod 6. Thus, the connecting rod 6 can be located at the leftmost side of the movable bracket 5 in the initial state. A pressing plate 9 is pinned to the end of the connecting rod 6. One side of the bottom end of the pressing plate 9 is connected to a hydraulic cylinder group 10 pinned to the top side of the movable bracket 5. The interior of the hydraulic cylinder group 10 is connected to a hydraulic pump station set outside.

[0027] Furthermore, when the hydraulic cylinder assembly 10 is triggered, the pressing plate 9 can be forced to rotate around the end of the connecting rod 6, and exert a pressing action on the large workpiece placed on the worktable 2 to gradually straighten its position. After the large workpiece is straightened, as the pressing plate 9 continues to rotate and press, the connecting rod 6 can be forced to move to compress the elastic component 8, thereby relieving the pressure on the hydraulic cylinder assembly 10.

[0028] Meanwhile, under the rotating extrusion of the extrusion plate 9, large workpieces placed on the worktable 2 can be clamped, preventing them from moving during the milling process.

[0029] like Figure 2 , Figure 3 As shown, in this technical solution, the top of the workbench 2 is provided with several sets of piezoelectric modules 18 arranged in a linear array, and several sets of piezoelectric modules 18 in the corresponding area are electrically connected to the drive rails 4 at the corresponding positions. When the workbench 2 carries a large workpiece, the drive rails 4 at the corresponding positions are triggered by the triggering of the piezoelectric modules 18 in the corresponding areas, and the movable support 5 on it is moved towards the direction of the large workpiece until the extrusion plate 9 on the movable support 5 contacts the edge of the large workpiece, and then the hydraulic cylinder group 10 is triggered.

[0030] like Figure 3 As shown, in this technical solution, the pressure ring 7 has a rated pressure threshold inside and forms a feedback electrical connection with the hydraulic cylinder group 10. Then, when the hydraulic cylinder group 10 triggers and drives the extrusion plate 9 to rotate, the extrusion plate 9 continuously rotates and generates a large extrusion force on the large workpiece, forcing the connecting rod 6 to move and compress the elastic component 8. When the pressure generated by the pressure ring 7 reaches the set pressure threshold, the hydraulic supply to the hydraulic cylinder group 10 can be automatically cut off and maintained to fix the large workpiece that has been positioned on the worktable 2.

[0031] like Figure 3 As shown, in this technical solution, in the initial state, the extrusion plate 9 always remains tilted inward to ensure that it can contact the edge of the large workpiece during the process of moving inward under the action of the drive guide rail 4. Furthermore, a pad made of rubber material is provided at the top of the extrusion plate 9, thereby effectively reducing the extrusion damage caused by the extrusion plate 9 when it contacts the edge of the large workpiece.

[0032] like Figure 5As shown, in this technical solution, the electric spindle includes a housing 11 fixedly mounted on a slide. A hollow shaft 12 is movably connected inside the housing 11, and a driving component is provided inside the housing 11 to drive the hollow shaft 12, thereby driving the hollow shaft 12 to rotate. A cutting tool for milling large workpieces on flat or inclined surfaces is fixedly mounted at the bottom end of the hollow shaft 12. An electromagnetic sleeve 13 is fixedly sleeved inside the hollow shaft 12, and a magnetic pressure block 16 for adjusting the center of gravity of the hollow shaft 12 and the cutting tool on it is movably sleeved inside the electromagnetic sleeve 13. At the same time, a carbon brush 17 that forms a conductive connection with the electromagnetic sleeve 13 is fixedly sleeved at the bottom of the inner wall of the housing 11, thereby supplying power to the electromagnetic sleeve 13 through the carbon brush 17.

[0033] like Figure 4 , Figure 5 As shown, in this technical solution, a set of first piezoelectric sheets 14 are provided on the upper two sides of the outer surface of the hollow shaft 12, and a set of second piezoelectric sheets 15 are provided on the lower side of its outer surface. The first piezoelectric sheets 14, the second piezoelectric sheets 15 and the electromagnetic sleeve 13 form an electrical feedback connection.

[0034] When the electric spindle operates at an angle to process the inclined surface of a large workpiece, the hollow shaft 12 has a tool fixedly installed at its bottom end, making its mass larger at the bottom and smaller at the top. When it rotates at high speed, the larger mass at the bottom end easily leads to a larger centrifugal force. When the hollow shaft 12 experiences circular runout, the electromagnetic sleeve 13 can be triggered by the current signal fed back by the first piezoelectric plate 14 and the second piezoelectric plate 15. This triggers the electromagnetic sleeve 13 to generate currents of different intensities, forcing the magnetic pressure block 16 to move upward to a corresponding degree. This balances the different intensities of centrifugal force generated at the bottom end of the hollow shaft 12 when it is tilted at different angles. This effectively alleviates the circular runout phenomenon of the hollow shaft 12 when it is tilted and rotates at high speed. At the same time, it effectively reduces the wear of the upper support bearing of the hollow shaft 12 when it is rotating at high speed and tilting.

[0035] In this technical solution, the electromagnetic sleeve 13 forms an electrical feedback connection with the drive component that controls the tilting of the electric spindle, and forms an AND logic gate. The electromagnetic sleeve 13 can only be triggered when the drive component triggers and drives the electric spindle to rotate.

Claims

1. A gantry milling machine for processing large mechanical equipment, comprising two sets of bed slide rails (1), and a worktable (2) provided between the two sets of bed slide rails (1), wherein the bottom end of the worktable (2) is fixedly connected to the foundation structure, and a movable column beam frame (3) is movably connected to the top of the bed slide rails (1), and a slide saddle and a slide ram are provided on the movable column beam frame (3), and an electric spindle is provided on the slide ram, characterized in that: The workbench (2) has a cross-shaped structure, and a set of drive rails (4) are fixedly installed on the left and right sides of the transverse gap of the cross-shaped structure. A movable bracket (5) is movably connected on the drive rails (4). A connecting rod (6) with one end extending to the outside of the movable bracket (5) is movably connected inside the movable bracket (5). A pressure ring (7) is fixedly sleeved in the middle of the outer surface of the connecting rod (6) and in the inner cavity of the movable bracket (5). The pressure ring (7) and the right side of the inner cavity of the movable bracket (5) are connected by a transmission connection through an elastic component (8) movably sleeved on the outer surface of the connecting rod (6). A pressing plate (9) is pinned to the end of the connecting rod (6), and one side of the bottom end of the pressing plate (9) is connected to a hydraulic cylinder group (10) pinned to the top side of the movable bracket (5). Trigger the hydraulic cylinder group (10) to make the extrusion plate (9) rotate around the end of the connecting rod (6) and extrude an extrusion action on the large workpiece placed on the workbench (2) to gradually straighten its position. After the large workpiece is straightened, the large workpiece placed on the workbench (2) can be clamped by the continuous rotation and extrusion of the extrusion plate (9). The electric spindle includes an outer shell (11) fixedly mounted on a slide. A hollow shaft (12) is movably connected inside the outer shell (11). An electromagnetic sleeve (13) is fixedly sleeved inside the hollow shaft (12), and a magnetic pressure block (16) is movably sleeved inside the electromagnetic sleeve (13). Meanwhile, a carbon brush (17) that forms a conductive connection with the electromagnetic sleeve (13) is fixedly sleeved at the bottom of the inner wall of the outer shell (11). A set of first piezoelectric sheets (14) is provided on the upper two sides of the outer surface of the hollow shaft (12), and a set of second piezoelectric sheets (15) is provided on the lower side of its outer surface. The first piezoelectric sheets (14), the second piezoelectric sheets (15) and the electromagnetic sleeve (13) form an electrical feedback connection. The electromagnetic sleeve (13) forms an electrical feedback connection with the drive unit that controls the tilting of the electric spindle, and forms an AND logic gate.

2. The gantry milling machine tool for large-scale mechanical equipment processing according to claim 1, characterized in that, The top of the workbench (2) is provided with several sets of piezoelectric modules (18) arranged in a linear array, and several sets of piezoelectric modules (18) in the corresponding area are electrically connected to the drive rails (4) at the corresponding positions.

3. The gantry milling machine tool for large-scale mechanical equipment processing according to claim 2, characterized in that, The pressure ring (7) has a rated pressure threshold inside and forms a feedback electrical connection with the hydraulic cylinder group (10).

4. The gantry milling machine tool for large-scale mechanical equipment processing according to claim 3, characterized in that, In the initial state, the extrusion plate (9) always remains tilted inward, and a pad made of rubber is provided at the top of the extrusion plate (9).

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