Gantry drilling machine and method of using same

Abstract

This invention discloses a method for drilling plates and a corresponding gantry drilling machine, belonging to the field of plate processing technology. The method includes: S101: measuring the dimensions of the plate to be processed and determining the number of workpiece supports required for plate processing; S102: determining which workpiece supports are needed; S103: adjusting the position of the workpiece support plates on the workpiece supports to ensure that both the front and rear ends of the plate are supported by workpiece support plates; S104: adjusting the position of the hydraulic clamping structure corresponding to the workpiece supports; S105: placing the plate in one corner of the groove and on the workpiece support plate, at which point one long side and one wide side of the plate abut against the corresponding hydraulic clamping structure and positioning structure, and the hydraulic clamping structure clamps the corresponding side of the plate; S106: moving the gantry back and forth, and moving the drilling device left and right to be directly above the plate to perform drilling processing on the plate.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal processing technology, and specifically relates to a gantry drilling machine and its usage method, particularly for drilling holes in laminated sheet metal. Background Technology

[0002] A drilling machine is a machine tool that uses a drill bit to process workpieces. It is widely used in industrial production. Existing drilling machines typically include a frame, a fixing device, and a drilling device. The user first fixes the object to be drilled using the fixing device, then moves the drilling device to drill. After drilling is finished, the drilling device is removed, and the object to be drilled is taken off the fixing device. This process is repeated to drill holes in the objects one by one. After each drilling is completed, the drilled object needs to be removed and replaced with the object to be drilled.

[0003] For example, patent application number CN201610743281.9 discloses a CNC gantry milling, turning, drilling, and boring composite machine tool system, including a worktable, gantry frame, crossbeam, vertical tool post, left bed, right bed, hydraulic system, and electrical system. The worktable uses lubricated guide rails, and the worktable spindle has a long spindle structure. The spindle is equipped with two sets of high-precision double-row short cylindrical roller bearings to ensure the radial runout of the worktable. The gantry frame consists of a left column and a right column, which are connected to the bed to form a closed symmetrical frame. The crossbeam is placed in front of the left and right columns, and two servo motors are installed on the upper part of the left and right columns to drive the crossbeam vertically on the left and right columns via ball screw pairs. A hydraulic cylinder clamps the crossbeam at the rear, and a hydraulic cylinder is installed at the right end of the crossbeam. The tool post has a horizontal feed box and a movable table that moves with the crossbeam. The vertical tool post is a CNC tool post, with both horizontal and vertical movements driven by a FANUC AC servo motor, which is transmitted through a reducer and ball screw pair to achieve the horizontal and vertical movements of the tool post. The horizontal movement of the tool post is achieved by a rectangular guide rail plus a PTFE soft belt mechanism, and the vertical movement of the ram adopts a roller-slider composite guide rail. The vertical movement of the ram is equipped with a hydraulic balance cylinder. There are two linear guide rails on each of the left and right beds. The left and right columns are respectively set on the linear guide rails on the left and right beds. The horizontal movement of the gantry is driven by a FANUC AC servo motor, which is transmitted through a reducer and ball screw pair. A boring and milling head box is provided on the crossbeam, a main transmission box is provided on the worktable, and a cooling and chip removal device is provided under the worktable.

[0004] In the prior art, the machining platform of a drilling machine (for machining stacked plates) includes a rectangular groove arranged along the front-to-back direction, a support device within the groove, and a plate clamping device on the groove and located above the support device. The plate is placed on the support device and clamped by the plate clamping device. The prior art has at least the following two problems: First, after each drilling operation, the drilled board needs to be removed and replaced with the board to be drilled, resulting in low drilling efficiency. Secondly, the clamping structure can usually only adapt to a few specifications of plates, resulting in low versatility of the drilling machine. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a gantry drilling machine and its method of use, specifically designed for processing stacked and regularly shaped sheet metal. The machine clamps the sheet metal at any one of the four corners of the slot. Workpiece support plates are adjusted in number and position to support the sheet metal, and the hydraulic clamping structure is adjusted accordingly to clamp the sheet metal. Thus, while processing is being performed at one corner, the sheet metal at the other corners is clamped and removed (placed near the corresponding position, slightly shifted during processing, and then fixed), resulting in high efficiency. The adjustable hydraulic clamping structure allows clamping throughout the entire slot, offering high versatility. The technical solution is as follows: On one hand, embodiments of the present invention provide a gantry drilling machine, including a worktable, a clamping device on the worktable, a gantry frame 1 on the worktable that can move back and forth, and a drilling device on the gantry frame 1 that can move left and right and vertically. The worktable includes a rectangular groove 2 arranged along the back and forth direction, a chip removal structure 3 at the bottom of the groove 2 arranged along the back and forth direction, a support grid 4 inside the groove 2, and a workpiece support 5 on the upper side of the support grid 4. The clamping device includes a hydraulic pump station 6. The number of workpiece supports 5 is four, and the four workpiece supports 5 are respectively located at the four corners of the support grid 4. At least three workpiece support plates 53 are arranged side by side on the workpiece support 5, and the workpiece support plates 53 can be adjusted back and forth. For the front workpiece support 5: the workpiece The front end of the support 5 is provided with a workpiece support plate 53. Multiple unused workpiece support plates 53 are removed or positioned away from the plate 11. For the rear workpiece support 5: the rear end of the workpiece support 5 is provided with a workpiece support plate 53. Multiple unused workpiece support plates 53 are removed or positioned away from the plate 11. The plate clamping device also includes four clamping slide rails 7, four corner transition structures 8, four central transition structures 9, four positioning structures 10, and twelve hydraulic clamping structures 12. The four clamping slide rails 7 are arranged in a rectangular pattern, located on the inner side of the corresponding groove edge of the groove 2, parallel to the corresponding groove edge of the groove 2, and located above the support grid 4, surrounding the support grid 4. The four corner transition structures 8 are located around the clamping slide rails 7. The four corner transition structures 8 and 9 are located at the four corners of the rectangle formed by the clamping slide rails 7. The four corner transition structures 8 and 9 are connected in series via hydraulic hard pipes to form a hydraulic circuit, each containing a hydraulic cavity. The hydraulic circuit is connected to the hydraulic pump station 6 via pipelines. The hydraulic clamping structure 12 is mounted on the clamping slide rail 7 and can be adjusted along it. Four positioning structures 10 are located at the left and right ends of the two left-right clamping slide rails 7 or the front and rear ends of the two front-back clamping slide rails 7, close to the corresponding corner transition structure 8, and fixed to the clamping slide rail 7. The corner transition structure 8 and the adjacent middle transition structure 9... The spacer is provided with two hydraulic clamping structures 12 or one hydraulic clamping structure 12 and one positioning structure 10. If there are two hydraulic clamping structures 12, the two hydraulic clamping structures 12 are connected to the adjacent corner transition structure 8 and the middle transition structure 9 respectively through hydraulic hoses. If there is one hydraulic clamping structure 12 and one positioning structure 10, the hydraulic clamping structure 12 is connected to the adjacent corner transition structure 8 or the middle transition structure 9 through hydraulic hoses. During processing, the plate 11 is located at one corner of the groove 2 and is placed on one or more workpiece supports 5. One of its long sides is clamped and positioned by at least two hydraulic clamping structures 12 on the corresponding side, and one of its wide sides is clamped and positioned by one positioning structure 10 and at least one hydraulic clamping structure 12.A workpiece support plate 53 is provided on the lower side of each of the front and rear ends of the plate 11, and a workpiece support plate 53 may or may not be provided in the middle of its lower side.

[0006] In this embodiment of the invention, the chip removal structure 3 includes a front horizontal section and a rear inclined section. The horizontal section is located at the bottom of the tank 2 along the front-to-back direction, with its rear end extending out of the tank 2 and positioned along the centerline of the tank 2. The inclined section is positioned obliquely upward from front to back, and the hydraulic pump station 6 is located directly below the inclined section. The hydraulic clamping structure 12 is connected to the hydraulic circuit. The two central transition structures 9 on the front and rear sides serve as the inlet and outlet of the hydraulic circuit, respectively, and are connected to the hydraulic pump station 6 through pipelines. The two workpiece supports 5 on the left are arranged side by side and are located at the upper left of the horizontal section, and the two workpiece supports 5 on the right are arranged side by side and are located at the upper right of the horizontal section. The bottom of the tank 2 is conical, with its left side obliquely downward from left to right to the left side of the horizontal section, and its right side obliquely downward from right to left to the right side of the horizontal section.

[0007] In this embodiment of the invention, the trough 2 has translational slide rails on both the left and right sides along the front-back direction. The gantry frame 1 is arranged in the left-right direction, and the lower parts of its two vertical beams are slidably mounted on the translational slide rails on the corresponding sides. A drive structure for driving the gantry frame 1 to move forward and backward is provided between the left or right side of the trough 2 and the vertical beam on the corresponding side. The upper front and upper rear sides of the gantry frame 1 are provided with flip doors. The flip doors are located above the support grid 4, and the flip doors on the front and rear sides can be opened forward and backward, respectively.

[0008] In this embodiment of the invention, the corner transition structure 8 includes a hydraulic cavity arranged in the front-to-back direction and two fixed arms at the front and back ends of the upper side. The hydraulic cavity is fixed to the groove 2, and the hydraulic clamping structure 12 is connected to the hydraulic cavity through a hydraulic hose. The four clamping slide rails 7 are two transverse slide rails and two longitudinal slide rails. The two transverse slide rails are arranged side by side in the front and back direction and are both arranged in the left-to-right direction. The two longitudinal slide rails are arranged side by side in the left and right direction and are both arranged in the front-to-back direction. The end of the transverse slide rail is fixed to the front or back side of the outer fixed arm and is fixed to the fixed arm. On the inner side of the fixed arm, the end of the longitudinal slide rail is fixed to the left or right side of the inner fixed arm; the corner transition structure 8 and the middle transition structure 9 are fixed on the groove 2; the clamping slide rail 7 is suspended, its middle part is fixed on the middle transition structure 9, and its end is fixed on the fixed arm of the corner transition structure 8; the hydraulic hard pipe is arranged along the front-back or left-right direction, located directly below the corresponding clamping slide rail 7, and its front and rear ends or left and right ends are respectively connected to the hydraulic cavity of the corresponding corner transition structure 8 and the middle transition structure 9.

[0009] In this embodiment of the invention, the hydraulic clamping structure 12 includes a vertically arranged rectangular column 21, a hydraulic cylinder 22 at the bottom of the rectangular column 21, a clamping block 23 on the upper part of the rectangular column 21 that can slide vertically, a support block 24 on the inner side of the lower part of the rectangular column 21, and a locking mechanism 25 on the outer side of the rectangular column 21. The rectangular column 21 is located on the outer side of the corresponding side of the plate 11, and its inner side is arranged in the left-right or front-back direction and is parallel to the corresponding side of the plate 11. The locking mechanism 25 is locked and fixed on the clamping slide rail 7 and can be adjusted along the clamping slide rail 7. The inner end of the clamping block 23 extends inward relative to the inner side of the rectangular column 21. And it is located directly above the corresponding side of the plate 11; the support block 24 is located directly below the clamping block 23, and it is located on the lower side of the plate 11, and it is flush with the workpiece support plate 53; the hydraulic cylinder 22 is vertically arranged, and it is connected to the corner transition structure 8 or the middle transition structure 9 through a hydraulic hose, and the upper end of its telescopic rod is fixedly connected to the clamping block 23; when the hydraulic clamping structure 12 clamps the plate 11; the corresponding side of the plate 11 is placed on the support block 24 and abuts against the inner side of the rectangular column 21; at this time, when the hydraulic cylinder 22 retracts, the inner end of the clamping block 23 presses against the upper side of the corresponding side of the plate 11.

[0010] In this embodiment of the invention, the positioning structure 10 includes a fixed column fixed on the clamping slide rail 7 and a stepped surface on its inner side; the inner side of the fixed column is vertically arranged, and its inner side is arranged along the left-right or front-back direction, and its inner side is parallel to the corresponding side of the plate 11, and its inner side abuts against the corresponding side of the plate 11; the stepped surface is located on the lower side of the plate 11 and is flush with the workpiece support plate 53.

[0011] In this embodiment of the invention, the supporting grid 4 is horizontally arranged, located inside the trough 2, above the horizontal section. It is a grid plate comprising multiple horizontal beams arranged side-by-side and multiple vertical beams arranged side-by-side. The horizontal beams are arranged in the left-right direction and their left and right ends are respectively fixed to the left and right sides of the trough 2. The vertical beams are arranged in the front-back direction and their front and rear ends are respectively fixed to the front and rear sides of the trough 2. The horizontal and vertical beams are arranged intersectingly. The workpiece support 5 includes two locking rods 51 arranged side-by-side, at least one suspended support rod 52 between the two locking rods 51, M workpiece support plates 53 arranged side-by-side, and multiple vertical support plates 53 arranged side-by-side. Multiple reinforcing beams 54 are provided. The locking and fixing rods 51 and the suspended support rods 52 are both arranged in the front-to-back direction and are fixed to the upper side of the corresponding longitudinal beams. The workpiece support plate 53 is arranged in the left-to-right direction and is vertically arranged. It can be adjusted back and forth and is detachably mounted on the locking and fixing rods 51. Its middle part is placed on the suspended support rods 52, and its left and right ends are respectively fixed to the two locking and fixing rods 51 in a front-to-back adjustment manner. The reinforcing beams 54 are arranged in the left-to-right direction and are located between the two locking and fixing rods 51. They are arranged intersecting with the suspended support rods 52. Their tops are lower than the tops of the suspended support rods 53 and are fixed to the upper side of the corresponding crossbeams. M is an integer from 3 to 6.

[0012] Furthermore, in this embodiment of the invention, the two locking rods 51 are provided with sliding grooves 55 on their opposite sides, and the sliding grooves 55 are arranged in the front-back direction; the left and right ends of the lower side of the workpiece support plate 53 are provided with two sliders 56 that cooperate with the sliding grooves 55, and their ends are placed on the corresponding locking rods 51, and their upper front and rear sides gradually approach each other to form an isosceles trapezoid with a smaller upper side and a larger lower side; the sliders 56 are slidably disposed in the corresponding sliding grooves 55, and the sliders 56 near the chip removal structure 3 are provided with locking bolts 57; the locking bolts 57 are arranged in the left-right direction and lock the workpiece support plate 53 to the locking rods 51.

[0013] Specifically, in this embodiment of the invention, each workpiece support 5 is provided with a suspended support rod 52, two locking and fixing rods 51, three reinforcing beams 54 and M workpiece support plates 53. The two locking and fixing rods 51, the suspended support rod 52 and the three reinforcing beams 54 form a grid-shaped structure. Correspondingly, the number of longitudinal beams is 6 and the number of transverse beams is 6.

[0014] On the other hand, embodiments of the present invention also provide a method for drilling holes in sheet metal, using the aforementioned gantry drilling machine, the method comprising: S101: Measure the dimensions of the sheet material 11 to be processed and determine the number of workpiece supports 5 required for processing the sheet material 11.

[0015] S102: Determine which workpiece supports are required.

[0016] S103: Adjust the position of the workpiece support plate 53 on the workpiece bracket 5 to ensure that both the front and rear ends of the plate 11 are supported by the workpiece support plate 53. Depending on the size of the plate 11 and the drilling position, the middle of the plate 11 may or may not be equipped with a workpiece support plate 53.

[0017] S104: Adjust the position of the hydraulic clamping structure 12 corresponding to the workpiece support 5 to ensure that at least: two hydraulic clamping structures 12 are set at both ends of one long side of the clamped plate 11, and one positioning structure 10 and one hydraulic clamping structure 12 are set at both ends of one wide side of the clamped plate 11.

[0018] S105: Place the plate 11 at one corner of the groove 2 and on the workpiece support plate 53. At this time, one long side and one wide side of the plate 11 abut against the corresponding hydraulic clamping structure 12 and positioning structure 10. The hydraulic clamping structure 12 clamps the corresponding side of the plate 11.

[0019] S106: The gantry frame 1 moves back and forth, and the drilling device moves left and right to be directly above the plate 11 to perform drilling on the plate 11. The beneficial effects of the technical solution provided by this invention are as follows: It is specifically designed for processing stacked and regularly shaped sheets (such as rectangles, L-shapes, right triangles, right trapezoids, etc.). The sheet can be clamped at any one of the four corners of the groove. The number and position of the workpiece support plates are adjusted accordingly to support the sheet, and the position of the hydraulic clamping structure is adjusted accordingly to clamp the sheet. Thus, while processing is being carried out at one corner (such as the front right corner), the sheet at other corners (such as the rear left corner) can be clamped and removed (placed near the corresponding position, slightly shifted and then fixed during processing), resulting in high efficiency. The hydraulic clamping structure is adjustable, enabling clamping throughout the entire groove, thus offering high versatility. In addition, both the workpiece support plates and the hydraulic clamping structure are easy to adjust. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the gantry drilling machine in an embodiment of the present invention; Figure 2 This is a schematic diagram of the gantry drilling machine in the embodiment of the present invention when processing small steel plates; Figure 3 This is a schematic diagram of the gantry drilling machine in the embodiment of the present invention during the processing of steel plates; Figure 4 This is a schematic diagram of the gantry drilling machine in the embodiment of the present invention when processing large steel plates; Figure 5 yes Figure 2 A magnified view of a portion of the image; Figure 6 This is a structural diagram of the combination of the tank and the chip removal structure; Figure 7 It is a structural diagram of the combination of transverse slide rail, corner transition structure, middle transition structure, hydraulic clamping structure and positioning structure; Figure 8 This is a top view of the hydraulic clamping structure; Figure 9 This is a schematic diagram of the hydraulic clamping structure; Figure 10 yes Figure 9 A structural diagram of the clamping plates; Figure 11 This is a schematic diagram of the structure of the locking rod away from the chip removal device; Figure 12 This is a structural diagram of the side of the locking rod near the chip removal device.

[0021] In the diagram: 1 Gantry frame, 2 Tank, 3 Chip removal structure, 4 Support grid, 5 Workpiece support, 6 Hydraulic pump station, 7 Clamping slide rail, 8 Corner transition structure, 9 Middle transition structure, 10 Positioning structure, 11 Plate, 12 Hydraulic clamping structure; 21 Rectangular column, 22 Hydraulic cylinder, 23 Clamping block, 24 Support block, 25 Locking mechanism 51 Locking rod, 52 Suspended support rod, 53 Workpiece support plate, 54 Reinforcing beam, 55 Slide groove, 56 Slider, 57 Locking bolt. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1 See Figure 1-12 Example 1 provides a gantry drilling machine, including a worktable, a clamping device on the worktable, a gantry frame 1 on the worktable that can move back and forth (driven by a corresponding structure), and a drilling device on the gantry frame 1 that can move left and right and vertically (driven by a corresponding structure).

[0024] The workbench includes a rectangular trough 2 arranged along the front-to-back direction, a chip removal structure 3 at the bottom of the trough 2 arranged along the front-to-back direction, a support grid 4 inside the trough 2, and four workpiece supports 5 on the upper side of the support grid 4.

[0025] The chip removal structure 3 includes a horizontal section at the front and an inclined section at the rear. The horizontal section is located at the bottom of the tank 2 in a front-to-back direction, with its rear end extending out of the tank 2 and positioned along the centerline of the tank 2. The inclined section is positioned obliquely upward from front to back.

[0026] The bottom of the trough 2 is conical, with its left side sloping downwards from left to right to the left side of the horizontal section, and its right side sloping downwards from right to left to the right side of the horizontal section. Both sides of the trough 2 have sliding rails along the front-to-back direction. The gantry frame 1 is arranged along the left-to-right direction, comprising two vertical beams arranged side-by-side and a top beam (arranged along the left-to-right direction) between their tops. The lower parts of the two vertical beams slide on the corresponding sliding rails. A drilling device is located on the top beam. A drive structure (specifically a screw structure arranged along the front-to-back direction) for driving the gantry frame 1 forward-to-back movement is provided between the left or right side of the trough 2 and the corresponding vertical beam. Both the upper front and upper rear sides of the gantry frame 1 have flip doors. The flip doors are located above the supporting grille 4, specifically rectangular doors arranged along the left-to-right direction, with their bottom hinged to the trough 2, and their left and right ends detachably connected to the corresponding sides of the trough 2 via pins. The flip doors on the front and rear sides can open forward and backward, respectively. Open the flip door to allow the operator to enter and adjust the workpiece support plate 53 and place the plate 11.

[0027] The supporting grid 4 is horizontally arranged inside the trough 2, above the horizontal section. It is a grid plate consisting of multiple horizontal beams arranged side-by-side and multiple vertical beams arranged side-by-side. The horizontal beams are arranged in the left-right direction and their left and right ends are fixed to the left and right sides of the trough 2, respectively. The vertical beams are arranged in the front-back direction and their front and rear ends are fixed to the front and rear sides of the trough 2, respectively. The horizontal beams and vertical beams are arranged intersectingly.

[0028] Among them, the four workpiece supports 5 are located at the four corners of the supporting grid 4. The two workpiece supports 5 on the left are arranged side by side and are located at the upper left of the horizontal section. The two workpiece supports 5 on the right are arranged side by side and are located at the upper right of the horizontal section.

[0029] The workpiece support 5 includes two locking rods 51 arranged side-by-side, at least one suspended support rod 52 between the two locking rods 51, M workpiece support plates 53 arranged side-by-side, and multiple reinforcing beams 54 arranged side-by-side. If there are multiple suspended support rods 52, they are arranged side-by-side. The locking rods 51 and the suspended support rods 52 are both arranged in the front-back direction and are fixed to the upper side of the corresponding longitudinal beams (specifically, different longitudinal beams). The workpiece support plates 53 are arranged in the left-right direction, are vertically oriented, can be adjusted front-back, and are detachably (e.g., removed forward or backward) mounted on the locking rods 51. The middle part is placed on the suspended support rods 52, and the left and right ends are respectively fixed to the two locking rods 51 in a front-back adjustable manner. The reinforcing beam 54 is arranged in the left-right direction, between the two locking rods 51, and intersects with the suspended support rod 52. Its top is lower than the top of the suspended support rod 53, and it is fixed to the upper side of the corresponding crossbeam. M is an integer from 3 to 6.

[0030] Specifically, for the front workpiece support 5: a workpiece support plate 53 is provided at the front end of the workpiece support 5, and multiple unused workpiece support plates 53 are removed or arranged to avoid the plate 11 (located at the front or rear, with multiple workpiece support plates 53 arranged adjacent to each other). For the rear workpiece support 5: a workpiece support plate 53 is provided at the rear end of the workpiece support 5, and multiple unused workpiece support plates 53 are removed or arranged to avoid the plate 11 (located at the front or rear, with multiple workpiece support plates 53 arranged adjacent to each other).

[0031] The plate clamping device includes a hydraulic pump station 6, four clamping slide rails 7, four corner transition structures 8, four central transition structures 9, four positioning structures 10, and twelve hydraulic clamping structures 12. The four clamping slide rails 7 are arranged in a rectangular pattern, located on the inner side of the corresponding groove edge of the groove 2, parallel to the corresponding groove edge of the groove 2, and positioned above the support grid 4, surrounding the support grid 4. The four corner transition structures 8 are located at the four corners of the rectangle formed by the clamping slide rails 7, and at the four corners of the groove 2. The four central transition structures 9 are located at the middle of the four sides of the rectangle formed by the clamping slide rails 7. The four corner transition structures 8 and the four central transition structures 9 are connected in series via two hydraulic hard pipes (arranged side-by-side) to form a hydraulic circuit, each containing two hydraulic cavities. The hydraulic circuit is connected to the hydraulic pump station 6 via pipelines. Specifically, the hydraulic pump station 6 is located directly below the inclined section. The hydraulic clamping structure 12 is connected to the hydraulic circuit. The two central transition structures 9 on the front and rear sides serve as the inlet and outlet of the hydraulic circuit, respectively, and are connected to the hydraulic pump station 6 through pipelines.

[0032] The hydraulic clamping structure 12 is mounted on the clamping slide rail 7 and is adjustable along the clamping slide rail 7. Four positioning structures 10 are respectively located at the left and right ends of the two left-right clamping slide rails 7 or at the front and rear ends of the two front-back clamping slide rails 7, positioned close to the corresponding corner transition structure 8 and fixed to the clamping slide rail 7. Between the corner transition structure 8 and the adjacent middle transition structure 9, there are two hydraulic clamping structures 12 or one hydraulic clamping structure 12 and one positioning structure 10. If there are two hydraulic clamping structures 12, they are connected to the adjacent corner transition structure 8 and middle transition structure 9 respectively via hydraulic hoses (the length of which must ensure that the hydraulic clamping structure 12 can be adjusted). If there is one hydraulic clamping structure 12 and one positioning structure 10, the hydraulic clamping structure 12 is connected to the adjacent corner transition structure 8 or middle transition structure 9 via hydraulic hoses (the length of which must ensure that the hydraulic clamping structure 12 can be adjusted).

[0033] During processing, the plate 11 is located at one corner of the groove 2 and is placed on one or more workpiece supports 5. One of its long sides is clamped and positioned by at least two hydraulic clamping structures 12 on the corresponding side (such as the left or right side), and one of its wide sides (such as the front or rear side) is clamped and positioned by a corresponding positioning structure 10 and at least one hydraulic clamping structure 12. A workpiece support plate 53 is provided on the lower side of each of the front and rear ends of the plate 11, and a workpiece support plate 53 may or may not be provided in the middle of its lower side.

[0034] In this embodiment of the invention, the corner transition structure 8 includes a hydraulic cavity arranged in the front-to-back direction and two fixed arms (vertically arranged) at the front and back ends of the upper side. The hydraulic cavity is fixed to the tank 2, specifically located at the lower part, and is used to ensure the flow of hydraulic oil. There are two hydraulic cavities (connected to two hydraulic hard pipes and two hydraulic soft pipes, respectively). The clamping structure 12 is connected to the hydraulic cavity through a hydraulic soft pipe. The four clamping slide rails 7 are two transverse slide rails and two longitudinal slide rails. The two transverse slide rails are arranged side by side in the front and back direction, and both are arranged in the left-to-right direction. The two longitudinal slide rails are arranged side by side in the left and right direction, and both are arranged in the front-to-back direction. The end of the transverse slide rail is fixed to the front or back side of the outer fixed arm and is fixed to the inside of the fixed arm. The end of the longitudinal slide rail is fixed to the left or right side of the inner fixed arm and is fixed to the inside of the fixed arm. The corner transition structure 8 and the middle transition structure 9 are fixed to the tank 2. The clamping slide rail 7 is suspended in the air, with its middle part fixed to the central transition structure 9 and its ends fixed to the fixed arm of the corner transition structure 8. The hydraulic hard pipe is arranged in the front-back or left-right direction, located directly below the corresponding clamping slide rail 7, and its front and rear ends or left and right ends are respectively connected to the hydraulic cavity of the corresponding corner transition structure 8 and the central transition structure 9.

[0035] The hydraulic clamping structure 12 in this embodiment includes a vertically arranged rectangular column 21, a hydraulic cylinder 22 at the bottom of the rectangular column 21, a vertically sliding clamping block 23 on the upper part of the rectangular column 21, a support block 24 on the inner side of the lower part of the rectangular column 21, and a locking mechanism 25 on the outer side of the rectangular column 21. The rectangular column 21 is located on the outer side of the corresponding edge of the plate 11, and its inner side is arranged in the left-right or front-back direction and is parallel to the corresponding edge of the plate 11. The locking mechanism 25 is locked and fixed on the clamping slide rail 7 and can be adjusted along the clamping slide rail 7. The inner end of the clamping block 23 extends inward relative to the inner side of the rectangular column 21 and is located directly above the corresponding edge of the plate 11. The support block 24 is located directly below the clamping block 23, on the lower side of the plate 11, flush with the workpiece support plate 53, and is arranged in the front-back or left-back direction. The hydraulic cylinder 22 is vertically positioned and connected to the corner transition structure 8 or the central transition structure 9 via a hydraulic hose. The upper end of its telescopic rod is fixedly connected to the clamping block 23. When the hydraulic clamping structure 12 clamps the plate 11, the corresponding edge of the plate 11 rests on the support block 24 and abuts against the inner side of the rectangular column 21. At this time, when the hydraulic cylinder 22 retracts, the inner end of the clamping block 23 presses against the upper side of the corresponding edge of the plate 11.

[0036] In this embodiment of the invention, the positioning structure 10 includes a fixed column fixed to the clamping slide rail 7 and a stepped surface on its inner side (stepping from the inside out, arranged along the left-right or front-back direction). The inner side of the fixed column is vertically arranged, and its inner side is arranged along the left-right or front-back direction. Its inner side is parallel to the corresponding edge of the plate 11, and its inner side abuts against the corresponding edge of the plate 11. Specifically, it is a T-shaped structure. The stepped surface is located on the lower side of the plate 11 and is flush with the workpiece support plate 53.

[0037] Furthermore, in this embodiment of the invention, the two locking rods 51 are provided with sliding grooves 55 on opposite sides, specifically on the right side of the right locking rod 51 and the left side of the left locking rod 51. The sliding grooves 55 are arranged in the front-back direction. Two sliders 56 that cooperate with the sliding grooves 55 are provided at the left and right ends of the lower side of the workpiece support plate 53. Their ends are placed on the corresponding locking rods 51, and their upper front and rear sides gradually approach each other to form an isosceles trapezoid with a smaller upper part and a larger lower part, thereby reducing the contact area and facilitating drilling. The sliders 56 are slidably disposed in the corresponding sliding grooves 55, and locking bolts 57 are provided on the sliders 56 near the chip removal structure 3. The locking bolts 57 are arranged in the left-right direction and lock the workpiece support plate 53 onto the locking rods 51. Loosening the locking bolts 57 allows the workpiece support plate 53 to be adjusted back and forth or removed forward or backward.

[0038] Example 2 See Figure 1-5Example 2 provides a gantry drilling machine, whose structure is basically the same as that of Example 1, except that: in this example, a positioning structure 10 and a hydraulic clamping structure 12 are arranged side by side on the left and right sides of the transverse slide rail. The positioning structure 10 is located between the corresponding hydraulic clamping structure 12 and the corner transition structure 8, and is located at the left or right end of the transverse slide rail. The hydraulic clamping structure 12 on the transverse slide rail is connected to the corresponding corner transition structure 8 through a hydraulic hose. Two hydraulic clamping structures 12 are arranged side by side on the front and rear sides of the longitudinal slide rail. The hydraulic clamping structure 12 on the longitudinal slide rail near the middle transition structure 9 is connected to the middle transition structure 9 through a hydraulic hose, and the hydraulic clamping structure 12 on the longitudinal slide rail near the corner transition structure 8 is connected to the corner transition structure 8 through a hydraulic hose. Specifically, on the left side of the front transverse slide rail, a positioning structure 10 and a hydraulic clamping structure 12 are arranged sequentially from left to right. The positioning structure 10 is located at the left end of the transverse slide rail. For the right side of the front transverse slide rail, a positioning structure 10 and a hydraulic clamping structure 12 are provided from right to left. The positioning structure 10 is located at the right end of the transverse slide rail. The rear transverse slide rail is set in the same way.

[0039] Example 3 See Figure 1-5 Example 3 provides a gantry drilling machine, whose structure is basically the same as that of Example 1, except that: each workpiece support 5 in this example is provided with a suspended support rod 52, two locking and fixing rods 51, three reinforcing beams 54 and five workpiece support plates 53. The two locking and fixing rods 51, the suspended support rod 52 and the three reinforcing beams 54 form a grid-shaped structure; correspondingly, there are 6 longitudinal beams and 6 transverse beams.

[0040] Example 4 Example 4 provides a method for drilling holes in sheet metal, using the gantry drilling machine described in any one of Examples 1-3, the method comprising: S101: Measure the dimensions of the sheet material 11 to be processed and determine the number (one, two, three or four) of workpiece supports 5 required for processing the sheet material 11.

[0041] S102: Determine which workpiece supports 5 need to be used based on the size and processing position (which needs to avoid the support structure), and determine which corner of the support grid 4 the plate 11 should be placed on.

[0042] S103: Adjust the position and number of workpiece support plates 53 on the workpiece bracket 5 to ensure that both the front and rear ends of the plate 11 are supported by workpiece support plates 53. Depending on the size of the plate 11 and the drilling location (which needs to avoid the support structure), a workpiece support plate 53 may or may not be set in the middle of the plate 11. If it is short, two workpiece support plates 53 are sufficient; if it is long, multiple workpiece support plates 53 are used (avoiding the processing location and distributing them as evenly as possible).

[0043] S104: Adjust the position of the hydraulic clamping structure 12 corresponding to the workpiece support 5 to ensure that: two hydraulic clamping structures 12 are set at both ends of one long side of the clamped plate 11 (if there is a hydraulic clamping structure 12 in between, the plate 11 will also be clamped), and one positioning structure 10 and one hydraulic clamping structure 12 are set at both ends of one wide side of the clamped plate 11 (if there is a hydraulic clamping structure 12 in between, the plate 11 will also be clamped).

[0044] S105: Place the plate 11 at one corner of the groove 2 and on the workpiece support plate 53. At this time, one long side and one wide side of the plate 11 abut against the corresponding hydraulic clamping structure 12 and positioning structure 10. The hydraulic clamping structure 12 clamps the corresponding side of the plate 11.

[0045] S106: The gantry frame 1 moves back and forth, and the drilling device moves left and right to be directly above the plate 11 to perform drilling on the plate 11.

[0046] Example 5 See Figure 2 Example 5 provides a gantry drilling machine, whose structure is basically the same as that of Example 2, except that the size of the trough 2 in this example is 2m*2m. The plate 11 to be processed is 60cm*60cm, which is a rectangular plate; four plates are stacked for processing. The plate 11 is located at the right front corner of the trough 2. The right side (one long side) of the plate 11 is clamped by two hydraulic clamping structures 12 at the front of the longitudinal slide rail on the right side, and the front side (one wide side) of the plate 11 is clamped by a positioning structure 10 and a hydraulic clamping structure 12 at the right side of the transverse slide rail on the front side. The plate 11 is supported by two workpiece support plates 53. Each workpiece support bracket 5 has 5 workpiece support plates 53. The workpiece support plates 53 of the right front workpiece support bracket 5 are distributed as 1 (located at the front end of the plate 11), 1 (located at the rear end of the plate 11), and 3 (located at the rear of the plate 11). The workpiece support plates 53 of the other three processing areas are distributed as 1 and 4. The sheet metal can then be clamped and removed in any of the other three processing areas (preferably the left rear processing area).

[0047] Example 6 See Figure 3Example 6 provides a gantry drilling machine, whose structure is basically the same as that of Example 2, except that the size of the trough 2 in this example is 2m*2m. The plate 11 to be processed is 130cm*60cm, which is a rectangular medium plate; four plates are stacked for processing. The plate 11 is located at the right front corner of the trough 2 and needs to be supported by two front workpiece supports 5. The right side (one long side) of the plate 11 is clamped by two hydraulic clamping structures 12 on the right longitudinal slide rail (two front hydraulic clamping structures 12, clamping the front and rear ends respectively). The front side (one wide side) of the plate 11 is clamped by a positioning structure 10 and two hydraulic clamping structures 12 on the front transverse slide rail (one left hydraulic clamping structure 12 and one right hydraulic clamping structure 12, clamping the left end and the middle respectively). The plate 11 is supported by four workpiece support plates 53 (two for each of the two front workpiece supports 5). Each workpiece support 5 has five workpiece support plates 53. The workpiece support plates 53 of the right front and left front workpiece brackets 5 are distributed as follows: 1 (located at the front end of plate 11), 1 (located at the rear end of plate 3), and 3 (located behind plate 3). The workpiece support plates 53 of the other two processing areas are distributed as follows: 1 and 4. Plates can then be clamped and removed from the rear of the support grid 4.

[0048] Example 7 See Figure 3 Example 7 provides a gantry drilling machine, whose structure is basically the same as that of Example 2, except that the size of the trough 2 in this example is 2m*2m. The plate 11 to be processed is 110cm*130cm, which is a rectangular plate; four plates are stacked for processing. The plate 11 is located at the right front corner of the trough 2 and needs to be supported by four workpiece supports 5. The right side (one long side) of the plate 11 is clamped by three hydraulic clamping structures 12 on the right longitudinal slide rail (two hydraulic clamping structures 12 at the front and one hydraulic clamping structure 12 at the rear, clamping the front end, middle and rear end respectively). The front side (one wide side) of the plate 11 is clamped by one positioning structure 10 and two hydraulic clamping structures 12 on the front transverse slide rail (one hydraulic clamping structure 12 on the left and one hydraulic clamping structure 12 on the right, clamping the left end and middle respectively). The plate 11 is supported by eight workpiece support plates 53 (three for each of the two front workpiece supports 5 and one for each of the two rear workpiece supports 5). The number of workpiece support plates 53 of the right front and left front workpiece brackets 5 is 3 (the other 2 are removed). The number of workpiece support plates 53 of the right rear and left rear workpiece brackets 5 is 5, distributed as 1 (located at the rear end of the plate 11) and 4 (located at the rear of the plate 11).

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gantry drilling machine, comprising a worktable, a clamping device on the worktable, a gantry frame (1) on the worktable that can move back and forth, and a drilling device on the gantry frame (1) that can move left and right and vertically, wherein the worktable comprises a rectangular groove (2) arranged along the back and forth direction, a chip removal structure (3) at the bottom of the groove (2) arranged along the back and forth direction, a support grid (4) inside the groove (2), and a workpiece support (5) on the upper side of the support grid (4), wherein the clamping device comprises a hydraulic pump station (6); characterized in that, The number of workpiece supports (5) is four, and the four workpiece supports (5) are located at the four corners of the support grid (4); at least three workpiece support plates (53) are arranged side by side on the workpiece support (5), and the workpiece support plates (53) can be adjusted forward and backward; for the front workpiece support (5): the front end of the workpiece support (5) is provided with a workpiece support plate (53), and the unused workpiece support plates (53) are removed or set aside to avoid the plate (11); for the rear workpiece support (5): the rear end of the workpiece support (5) is provided with a workpiece support plate (53), and the unused workpiece support plates (53) are removed or set aside to avoid the plate (11); The plate clamping device also includes four clamping slide rails (7), four corner transition structures (8), four central transition structures (9), four positioning structures (10), and twelve hydraulic clamping structures (12); the four clamping slide rails (7) are arranged in a rectangle, located on the inner side of the corresponding groove edge of the groove body (2), parallel to the corresponding groove edge of the groove body (2), located above the support grid (4), and surrounding the support grid (4); the four corner transition structures (8) are located at the four corners of the rectangle formed by the clamping slide rails (7) and at the four corners of the groove body (2); the four central transition structures (9) are located at the middle of the four sides of the rectangle formed by the clamping slide rails (7); the four corner transition structures (8) and the four central transition structures (9) are connected in series by hydraulic hard pipes to form a hydraulic circuit, and each of them is provided with a hydraulic cavity; the hydraulic circuit is connected to the hydraulic pump station (6) through pipelines; the hydraulic clamps The clamping structure (12) is mounted on the clamping slide rail (7) and can be adjusted along the clamping slide rail (7); four positioning structures (10) are respectively located at the left and right ends of the two left-right clamping slide rails (7) or at the front and rear ends of the two front-back clamping slide rails (7), and are located close to the corresponding corner transition structure (8), and are fixed on the clamping slide rail (7); the corner transition structure (8) and the adjacent middle transition structure (9) are provided with two hydraulic clamping structures (12) or one One hydraulic clamping structure (12) and one positioning structure (10); if there are two hydraulic clamping structures (12), the two hydraulic clamping structures (12) are connected to the adjacent corner transition structure (8) and the middle transition structure (9) respectively through hydraulic hoses; if there is one hydraulic clamping structure (12) and one positioning structure (10), the hydraulic clamping structure (12) is connected to the adjacent corner transition structure (8) or the middle transition structure (9) through hydraulic hoses; During processing; the plate (11) is located at one corner of the groove (2), and is placed on one or more workpiece supports (5). One of its long sides is clamped and positioned by at least two hydraulic clamping structures (12) on the corresponding side, and one of its wide sides is clamped and positioned by a corresponding positioning structure (10) and at least one hydraulic clamping structure (12). A workpiece support plate (53) is provided on the lower side of each of the front and rear ends of the plate (11), and a workpiece support plate (53) may or may not be provided in the middle of its lower side.

2. The gantry drilling machine according to claim 1, characterized in that, The chip removal structure (3) includes a horizontal section at the front and an inclined section at the rear; the horizontal section is located at the bottom of the tank (2) in the front-rear direction, and its rear end extends out of the tank (2) and is set along the center line of the tank (2); the inclined section is set obliquely upward from front to back, and the hydraulic pump station (6) is located directly below the inclined section. The hydraulic clamping structure (12) is connected to the hydraulic circuit; the two middle transition structures (9) on the front and rear sides serve as the inlet and outlet of the hydraulic circuit and are connected to the hydraulic pump station (6) through pipelines; the two workpiece supports (5) on the left are arranged side by side and are located at the upper left of the horizontal section; the two workpiece supports (5) on the right are arranged side by side and are located at the upper right of the horizontal section; the bottom of the tank (2) is conical, with the left side of its bottom sloping downward from left to right to the left side of the horizontal section, and the right side of its bottom sloping downward from right to left to the right side of the horizontal section.

3. The gantry drilling machine according to claim 1, characterized in that, The left and right sides of the trough (2) are provided with translation slide rails along the front and back directions. The gantry frame (1) is arranged along the left and right directions and the lower part of its two vertical beams slides on the translation slide rails on the corresponding side. The left or right side of the trough (2) is provided with a drive structure for driving the gantry frame (1) to move back and forth between the vertical beams on the corresponding side. The upper front and upper rear sides of the gantry frame (2) are provided with flip doors. The flip doors are located above the support grid (4), and the flip doors on the front and back sides can be opened forward and backward respectively.

4. The gantry drilling machine according to claim 1, characterized in that, The corner transition structure (8) includes a hydraulic cavity arranged in the front-back direction and two fixed arms at the front and rear ends of the upper side. The hydraulic cavity is fixed on the groove (2). The hydraulic clamping structure (12) is connected to the hydraulic cavity through a hydraulic hose. The four clamping slide rails (7) are two transverse slide rails and two longitudinal slide rails. The two transverse slide rails are arranged side by side in front and back and are both arranged in the left-right direction. The two longitudinal slide rails are arranged side by side in the left and right direction and are both arranged in the front-back direction. The end of the transverse slide rail is fixed to the front or rear side of the outer fixed arm and is fixed to the inner side of the fixed arm. The longitudinal slide rails are fixed to the front or rear side of the outer fixed arm and are fixed to the inner side of the fixed arm. The end of the slide rail is fixed to the left or right side of the inner fixed arm, which is fixed to the inner side of the fixed arm; the corner transition structure (8) and the middle transition structure (9) are fixed on the groove (2); the clamping slide rail (7) is suspended, with its middle part fixed on the middle transition structure (9) and its end fixed on the fixed arm of the corner transition structure (8); the hydraulic hard pipe is arranged along the front-back or left-right direction, located directly below the corresponding clamping slide rail (7), and its front and rear ends or left and right ends are respectively connected to the hydraulic cavity of the corresponding corner transition structure (8) and the middle transition structure (9).

5. The gantry drilling machine according to claim 1, characterized in that, The hydraulic clamping structure (12) includes a vertically arranged rectangular column (21), a hydraulic cylinder (22) at the bottom of the rectangular column (21), a clamping block (23) on the upper part of the rectangular column (21) that can slide vertically, a support block (24) on the inner side of the lower part of the rectangular column (21), and a locking mechanism (25) on the outer side of the rectangular column (21); the rectangular column (21) is located on the outer side of the corresponding side of the plate (11), and its inner side is arranged along the left-right or front-back direction and is parallel to the corresponding side of the plate (11); the locking mechanism (25) is locked and fixed on the clamping slide rail (7) and can be adjusted along the clamping slide rail (7); the inner end of the clamping block (23) extends inward relative to the inner side of the rectangular column (21) and its position The support block (24) is located directly above the corresponding side of the plate (11); the support block (24) is located directly below the clamping block (23), and is located on the lower side of the plate (11), and is flush with the workpiece support plate (53); the hydraulic cylinder (22) is set vertically, and is connected to the corner transition structure (8) or the middle transition structure (9) through a hydraulic hose, and the upper end of its telescopic rod is fixedly connected to the clamping block (23); when the hydraulic clamping structure (12) clamps the plate (11); the corresponding side of the plate (11) is placed on the support block (24) and abuts against the inner side of the rectangular column (21); at this time, when the hydraulic cylinder (22) retracts, the inner end of the clamping block (23) presses against the upper side of the corresponding side of the plate (11).

6. The gantry drilling machine according to claim 1, characterized in that, The positioning structure (10) includes a fixed column fixed on the clamping slide rail (7) and a stepped surface on its inner side; the inner side of the fixed column is vertically arranged, and its inner side is arranged along the left-right or front-back direction, and its inner side is parallel to the corresponding side of the plate (11), and its inner side abuts against the corresponding side of the plate (11); the stepped surface is located on the lower side of the plate (11) and is flush with the workpiece support plate (53).

7. The gantry drilling machine according to claim 2, characterized in that, The supporting grid (4) is horizontally arranged and located inside the trough (2). It is located above the horizontal section and is a grid plate. It includes multiple horizontal beams arranged side by side and multiple vertical beams arranged side by side. The horizontal beams are arranged in the left and right direction and their left and right ends are respectively fixed to the left and right sides of the trough (2). The vertical beams are arranged in the front and back direction and their front and back ends are respectively fixed to the front and back sides of the trough (2). The horizontal beams and vertical beams are arranged intersectingly. The workpiece support (5) includes two locking rods (51) arranged side by side, at least one suspended support rod (52) between the two locking rods (51), M workpiece support plates (53) arranged side by side, and multiple reinforcing beams (54) arranged side by side. The locking rods (51) and the suspended support rods (52) are both arranged in the front-to-back direction and are fixed to the upper side of the corresponding longitudinal beams. The workpiece support plates (53) are arranged in the left-to-right direction and are arranged vertically. It can be adjusted back and forth, and is detachably mounted on the locking rod (51). Its middle part is placed on the suspended support rod (52), and its left and right ends are respectively fixed to the two locking rods (51) in a back and forth adjustable manner. The reinforcing beam (54) is arranged in the left and right direction, and is located between the two locking rods (51). It is arranged to cross the suspended support rod (52), and its top is lower than the top of the suspended support rod (53). It is fixed on the upper side of the corresponding crossbeam. M is an integer from 3 to 6.

8. The gantry drilling machine according to claim 7, characterized in that, Two locking rods (51) are provided with grooves (55) on opposite sides, and the grooves (55) are arranged in the front-to-back direction; the workpiece support plate (53) is provided with two sliders (56) at the left and right ends of the lower side, which cooperate with the grooves (55), and their ends are placed on the corresponding locking rods (51). The front and back sides of the upper part gradually approach each other to form an isosceles trapezoid with a smaller upper part and a larger lower part; the sliders (56) are slidably arranged in the corresponding grooves (55), and the sliders (56) near the chip removal structure (3) are provided with locking bolts (57); the locking bolts (57) are arranged in the left-to-right direction and lock the workpiece support plate (53) on the locking rods (51).

9. The gantry drilling machine according to claim 7, characterized in that, Each workpiece support (5) is provided with a suspended support rod (52), two locking rods (51), three reinforcing beams (54) and M workpiece support plates (53). The two locking rods (51), the suspended support rod (52) and the three reinforcing beams (54) form a grid-shaped structure. Correspondingly, there are 6 longitudinal beams and 6 transverse beams.

10. A method for drilling plates using a gantry drilling machine as described in claim 1, characterized in that, The method includes: S101: Measure the dimensions of the sheet material (11) to be processed and determine the number of workpiece supports (5) required when processing the sheet material (11); S102: Determine which workpiece supports need to be used (5); S103: Adjust the position of the workpiece support plate (53) on the workpiece bracket (5) to ensure that the front and rear ends of the plate (11) are supported by the workpiece support plate (53). Depending on the size of the plate (11) and the drilling position, the middle of the plate (11) may or may not be equipped with a workpiece support plate (53). S104: Adjust the position of the hydraulic clamping structure (12) corresponding to the workpiece support (5) to be used, and at least ensure that: two hydraulic clamping structures (12) are set at both ends of one long side of the clamped plate (11), and one positioning structure (10) and one hydraulic clamping structure (12) are set at both ends of one wide side of the clamped plate (11). S105: Place the plate (11) in one corner of the groove (2) and place it on the workpiece support plate (53). At this time, one long side and one wide side of the plate (11) abut against the corresponding hydraulic clamping structure (12) and positioning structure (10). The hydraulic clamping structure (12) clamps the corresponding side of the plate (11). S106: The gantry (1) moves back and forth, and the drilling device moves left and right to be directly above the plate (11) to perform drilling on the plate (11).

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