A heavy-duty overhead gantry pentahedron machining center

Abstract

The utility model relates to numerical control machine tool technical field discloses a heavy cutting's crown block gantry five -face processing center, including the workstation, the workstation both sides symmetry is provided with the stand, two the stand top end is erected with the crossbeam, install the slide saddle and the slide saddle sliding connection's slide ram on the crossbeam, the slide ram lower extreme is connected with the universal head, drive system, including for driving the crossbeam, slide saddle and the slide ram move's X axle double screw rod synchronous drive mechanism, Y axle screw rod drive mechanism and Z axle screw rod drive mechanism, the utility model discloses through X axle double screw rod synchronous drive, ensure the positioning accuracy when crossbeam big stroke movement, cooperate Y, Z axle screw rod drive, promoted the stability of multi -shaft linkage processing, effectively solved the problem of single screw rod drive synchronous accuracy deficiency. The slide ram adopts the square cross section hard rail structure and cooperates the hydraulic balance oil cylinder, compared with traditional cylindrical section anti -deformation ability significantly enhances, and the stability is better when heavy cutting.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a heavy-duty overhead gantry five-sided machining center. Background Technology

[0002] Overhead gantry machining centers, due to their large-span machining capabilities and high-rigidity structure, are widely used in heavy-duty cutting processes in aerospace, heavy mold making, and other fields. Existing equipment mostly uses single-screw drives or traditional gantry frame structures, which present significant technical bottlenecks when handling heavy cutting of large parts. The single-screw driven crossbeams are prone to insufficient synchronization accuracy during large-stroke movements due to uneven load distribution, especially during bidirectional feed, where positioning deviations are prominent. Furthermore, traditional rams often use cylindrical cross-section designs, which lack sufficient torsional rigidity in heavy-duty cutting conditions such as deep cavity milling, making them susceptible to structural deformation due to cutting forces, affecting the surface finish. Moreover, extending the machine's stroke relies on modifications to the integral frame, making modular splicing of the columns and worktable impossible. Machining large workpieces requires customized machine tools, resulting in high modification costs and lengthy development cycles. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a heavy-duty overhead crane gantry five-sided machining center. Through the design of X-axis dual lead screw synchronous drive, square section hard rail slide, modular splicing structure and quick-disassembly protective parts, it systematically solves the deficiencies of existing technologies in terms of driving accuracy, structural rigidity, expandability and maintenance efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A heavy-duty overhead gantry five-sided machining center includes:

[0006] The workbench has symmetrical columns on both sides, and a crossbeam is mounted on the top of the two columns. A saddle and a ram that are slidably connected to the saddle are installed on the crossbeam, and a universal joint is connected to the lower end of the ram.

[0007] The drive system includes an X-axis dual lead screw synchronous drive mechanism, a Y-axis lead screw drive mechanism, and a Z-axis lead screw drive mechanism for driving the movement of the crossbeam, saddle, and ram.

[0008] The columns, workbench and crossbeams adopt a modular splicing design;

[0009] The moving components of the crossbeam, column, and slide are equipped with protective parts on their outer sides.

[0010] Preferably, the protective component includes a fixing plate fixed to the movable component and a protective cover covering the outside of the movable component. The fixing plate has two plates located at both ends of the protective cover. Positioning plates are provided at both ends of the protective cover corresponding to the positions of the fixing plates. A clamping plate is provided on one side of the fixing plate corresponding to the protective cover. The positioning plate is located between the fixing plate and the clamping plate and forms a clamping and positioning through the gap between the two, so as to realize the rapid installation of the protective cover.

[0011] Preferably, the clamping plate has a locking hole, and the positioning plate has a positioning block that engages with the locking hole. When the positioning block engages with the locking hole, it forms a locked state to improve the stability of the protective cover installation. The cooperation between the locking hole and the positioning block can improve the stability of the protective cover after installation.

[0012] Preferably, the positioning plate includes a first deformation section, and the clamping plate includes a second deformation section. Both the positioning plate and the clamping plate are made of elastic material. When the protective cover is lifted upward, the first deformation section and the second deformation section elastically deform, causing the positioning block to disengage from the resistance of the locking hole.

[0013] Preferably, the clamping plate is provided with a stop plate to limit the movement range of the positioning plate to ensure that the positioning block is accurately engaged in the card hole.

[0014] Preferably, the positioning plate is provided with a first guide arc and the clamping plate is provided with a second guide arc. The smooth transition between the first guide arc and the second guide arc avoids hard collision between the positioning plate and the clamping plate and protects the contact surface from wear.

[0015] Preferably, the slide adopts a rigid rail structure with a square cross section and is equipped with a hydraulic balance cylinder to resist deformation caused by cutting force.

[0016] Preferably, the saddle and ram are made of high-strength cast iron, and the guide rail pair consists of a plastic-coated plate and a medium-frequency hardened sliding guide rail to improve the rigidity and lubrication effect of the equipment.

[0017] Preferably, the columns can be spliced ​​front and back to increase the X-axis travel, the worktable can be spliced ​​to expand the processing range, and the crossbeams can be modularly spliced ​​to form different Y-axis travels to improve the processing adaptability of the equipment. The front and back splicing of the columns increases the X-axis travel, the splicing of the worktable expands the processing range, and the modular splicing of the crossbeams adjusts the Y-axis travel, thereby improving the processing adaptability of the equipment. The column modules can be spliced ​​by bolts and positioning pins.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention utilizes a dual-screw synchronous drive on the X-axis to ensure positioning accuracy during large-stroke movement of the crossbeam. Combined with Y and Z-axis screw drives, it enhances the stability of multi-axis linkage machining and effectively solves the problem of insufficient synchronous accuracy in single-screw drives. The ram adopts a square-section hardened rail structure and is equipped with a hydraulic balance cylinder, which significantly enhances its resistance to deformation compared to traditional cylindrical sections, resulting in better stability during heavy cutting and extending the equipment's service life.

[0020] The modular splicing design allows for flexible expansion of the stroke of the columns, worktable, and crossbeams without requiring a complete equipment replacement, reducing the modification cost for processing large-sized workpieces. Furthermore, the protective components, through the cooperation of the fixing plate, protective cover, positioning plate, and clamping plate, enable the rapid installation and removal of the protective cover, significantly shortening maintenance time. At the same time, the snap-fit ​​structure of the locking holes and positioning blocks improves installation stability, and the design of the guide arc and the abutment plate further improves positioning accuracy and installation convenience. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a structural view of the protective component of this utility model;

[0024] Figure 3 This is an exploded view of the protective component structure of this utility model;

[0025] Figure 4 This is a structural view of the positioning plate of this utility model;

[0026] Figure 5 This is a structural view of the clamping plate of this utility model;

[0027] Figure 6 This is a partial sectional view of the protective component of this utility model;

[0028] Figure 7 For the present utility model Figure 6 Enlarged view of point A in the middle.

[0029] Drawing number explanation: 1. Workbench; 2. Column; 3. Crossbeam; 4. Moving component; 5. Protective component; 51. Fixing plate; 52. Protective cover; 53. Positioning plate; 531. Deformation section one; 532. Guide arc one; 533. Positioning block; 54. Clamping plate; 541. Deformation section two; 542. Guide arc two; 543. Locking hole; 544. Support plate; 6. Saddle; 7. Roller; 8. Universal head. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0034] Please see Figure 1-7 A heavy-duty overhead gantry five-sided machining center includes a worktable 1 fixed to a foundation, with columns 2 symmetrically arranged on both sides of the worktable 1. A crossbeam 3 is mounted on the top of the two columns 2, and a saddle 6 is installed on the crossbeam 3. The saddle 6 can move along the crossbeam 3 in the Y-axis direction. A bolster 7 is slidably connected to the saddle 6, and the bolster 7 can rise and fall along the saddle 6 in the Z-axis direction. A universal joint 8 is connected to the lower end of the bolster 7 for mounting machining tools to achieve five-sided machining. The X-axis dual lead screw synchronous drive avoids the synchronization error caused by uneven load of the single lead screw and ensures the positioning accuracy when the crossbeam 3 moves with a large stroke. The Y / Z axis lead screw drive ensures the stability of vertical feed.

[0035] The ram 7 adopts a square cross-section hardened rail structure. Compared with the traditional cylindrical cross-section, the square cross-section can more effectively resist the deformation caused by cutting forces, and exhibits stronger stability, especially in heavy cutting. The ram 7, together with the hydraulic balance cylinder, further enhances the bending resistance and extends the service life of the equipment.

[0036] The slide saddle 6 and slide ram 7 are made of high-strength cast iron and manufactured using resin sand molding technology. They have good rigidity and wear resistance. The guide rail pair adopts a combination structure of plastic-coated plate and medium-frequency hardened sliding guide rail. The plastic-coated plate reduces the coefficient of friction, while the medium-frequency hardened sliding guide rail improves the hardness and wear resistance of the guide rail. Combined with a powerful lubrication system, the slide ram 7 has good dynamic characteristics and faster start-stop response.

[0037] The drive system includes an X-axis dual lead screw synchronous drive mechanism, a Y-axis lead screw drive mechanism, and a Z-axis lead screw drive mechanism. The X-axis dual lead screw synchronous drive mechanism is mounted on the column 2 and is used to drive the crossbeam 3 to move along the column 2 in the X-axis direction. The Y-axis lead screw drive mechanism is set on the crossbeam 3 and drives the slide saddle 6 to move along the crossbeam 3. The Z-axis lead screw drive mechanism is mounted on the slide saddle 6 and drives the slide ram 7 to rise and fall. The X-axis dual lead screw synchronous drive ensures the synchronicity and accuracy of the crossbeam 3's movement and is suitable for heavy cutting machining with large spans.

[0038] The column 2, worktable 1, and crossbeam 3 all adopt a modular splicing design. The column 2 can be spliced ​​front and rear to increase the X-axis travel. The worktable 1 can be spliced ​​to expand the processing range. The crossbeam 3 can be modularly spliced ​​to form different Y-axis travels. For example, when it is necessary to process larger workpieces, new column 2 modules can be spliced ​​at the front and rear ends of the existing column 2, and the worktable 1 and crossbeam 3 modules can be spliced ​​accordingly to realize flexible expansion of the equipment travel without replacing the entire equipment, thus reducing costs.

[0039] The protective component 5 is used to cover the moving assembly 4 of the crossbeam 3, column 2 and slide 7 to prevent chip accumulation and cutting fluid splashing. The fixing plate 51 is fixedly installed on the moving assembly 4 (such as the connection between the crossbeam 3 and the column 2). The protective cover 52 is covered on the outside of the moving assembly 4. Two fixing plates 51 are provided at each end of the protective cover 52. Positioning plates 53 are provided at both ends of the protective cover 52 corresponding to the positions of the fixing plates 51. A clamping plate 54 is provided on one side of the fixing plate 51 corresponding to the protective cover 52. The positioning plate 53 is located between the fixing plate 51 and the clamping plate 54, and clamping and positioning are formed through the gap between the two.

[0040] The clamping plate 54 has a locking hole 543, and the positioning plate 53 has a positioning block 533 that engages with the locking hole 543. When the positioning block 533 engages with the locking hole 543, it forms a locked state to improve the stability of the protective cover 52 during installation. The cooperation between the locking hole 543 and the positioning block 533 can improve the stability of the protective cover 52 after installation.

[0041] When installing the protective cover 52, align the protective cover 52 with the moving component 4, and insert the positioning plate 53 into the gap between the fixed plate 51 and the clamping plate 54. Since the positioning plate 53 is provided with a first guide arc 532 and the clamping plate 54 is provided with a second guide arc 542, the guiding effect of the guide arcs facilitates the smooth insertion of the positioning plate 53. When the positioning plate 53 is inserted into place, the positioning block 533 on the positioning plate 53 engages with the locking hole 543 on the clamping plate 54 to form a locked state, ensuring that the protective cover 52 is installed stably. The positioning plate 53 includes a first deformation section 531 and the clamping plate 54 includes a second deformation section 541. Both the positioning plate 53 and the clamping plate 54 are made of elastic material. When the protective cover 52 is lifted upward, the first deformation section 531 and the second deformation section 541 deform elastically, causing the positioning block 533 to disengage from the resistance of the locking hole 543.

[0042] The clamping plate 54 is provided with a stop plate 544 to limit the movement range of the positioning plate 53 to ensure that the positioning block 533 is accurately inserted into the card hole 543. The positioning plate 53 is provided with a first guide arc 532, and the clamping plate 54 is provided with a second guide arc 542. The smooth transition between the second guide arc 542 and the first guide arc 532 avoids hard collision between the positioning plate 53 and the clamping plate 54, and protects the contact surface from wear.

[0043] When disassembling the protective cover 52, lift the protective cover 52 upwards. The first deformation section 531 of the positioning plate 53 and the second deformation section 541 of the clamping plate 54 undergo elastic deformation under the action of force (both the positioning plate 53 and the clamping plate 54 are made of elastic materials such as spring steel), causing the positioning block 533 to disengage from the locking hole 543, thereby realizing the rapid removal of the protective cover 52. The abutment 544 on the clamping plate 54 is used to limit the movement range of the positioning plate 53, ensuring that the positioning block 533 is accurately locked into the locking hole 543, and improving the installation positioning accuracy.

[0044] When heavy cutting is required for large workpieces, the stroke of the column 2, worktable 1 and crossbeam 3 is first extended according to the workpiece size through modular splicing design to adjust to a suitable machining range. Then, the workpiece is fixed on the worktable 1, and the movement of the crossbeam 3, slide saddle 6 and slide ram 7 is controlled by the drive system so that the universal head 8 can drive the tool to the machining position.

[0045] During the processing, the protective component 5 effectively protects the moving component 4, preventing chips and cutting fluid from affecting the operation of the equipment. When the moving component 4 needs maintenance, no tools are required. Simply lift the protective cover 52 upwards and use the elastic deformation of the positioning plate 53 and the clamping plate 54 to quickly remove the protective cover 52 for chip cleaning or guide rail maintenance. After maintenance, guide the protective cover 52 to be accurately inserted and locked by the guide arc to complete the installation.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A heavy-duty overhead crane gantry five-sided machining center, characterized in that, include: Workbench (1), with columns (2) symmetrically arranged on both sides of the workbench (1), and a crossbeam (3) mounted on the top of the two columns (2), with a sliding saddle (6) and a sliding bolster (7) slidably connected to the sliding saddle (6) mounted on the crossbeam (3), and a universal joint (8) connected to the lower end of the sliding bolster (7). The drive system includes an X-axis double screw synchronous drive mechanism, a Y-axis screw drive mechanism and a Z-axis screw drive mechanism for driving the crossbeam (3), the saddle (6) and the ram (7) to move; The column (2), workbench (1) and crossbeam (3) adopt a modular splicing design; The moving components (4) of the crossbeam (3), column (2) and slide (7) are provided with protective parts (5).

2. The heavy-duty overhead crane gantry five-sided machining center according to claim 1, characterized in that: The protective component (5) includes a fixing plate (51) fixed on the moving component (4) and a protective cover (52) covering the outside of the moving component (4). The fixing plate (51) has two plates located at both ends of the protective cover (52). The protective cover (52) has positioning plates (53) at both ends corresponding to the positions of the fixing plate (51). The fixing plate (51) has a clamping plate (54) on one side corresponding to the protective cover (52). The positioning plate (53) is located between the fixing plate (51) and the clamping plate (54) and forms a clamping position through the gap between the two, so as to realize the quick installation of the protective cover (52).

3. A heavy-duty overhead crane gantry five-sided machining center according to claim 2, characterized in that: The clamping plate (54) has a locking hole (543), and the positioning plate (53) has a positioning block (533) that engages with the locking hole (543). When the positioning block (533) engages with the locking hole (543), it forms a locked state to improve the stability of the protective cover (52) installation.

4. A heavy-duty overhead crane gantry five-sided machining center according to claim 3, characterized in that: The positioning plate (53) includes a first deformation section (531), and the clamping plate (54) includes a second deformation section (541). Both the positioning plate (53) and the clamping plate (54) are made of elastic material.

5. A heavy-duty overhead crane gantry five-sided machining center according to claim 4, characterized in that: The clamping plate (54) is provided with a stop plate (544) to limit the movement range of the positioning plate (53) to ensure that the positioning block (533) is accurately engaged in the card hole (543).

6. A heavy-duty overhead crane gantry five-sided machining center according to claim 5, characterized in that: The positioning plate (53) is provided with a guide arc one (532), and the clamping plate (54) is provided with a guide arc two (542).

7. A heavy-duty overhead crane gantry five-sided machining center according to claim 6, characterized in that: The slide (7) adopts a square cross-section hard rail structure and is equipped with a hydraulic balance cylinder to resist the deformation caused by cutting force.

8. A heavy-duty overhead crane gantry five-sided machining center according to claim 7, characterized in that: The slide saddle (6) and slide ram (7) are made of high-strength cast iron. The guide rail pair is composed of a plastic-coated plate and a medium-frequency hardened sliding guide rail to improve the rigidity and lubrication effect of the equipment.

9. A heavy-duty overhead crane gantry five-sided machining center according to claim 8, characterized in that: The column (2) can be spliced ​​front and back to increase the X-axis travel, the worktable (1) can be spliced ​​to expand the processing range, and the crossbeam (3) can be modularly spliced ​​to form different Y-axis travels to improve the processing adaptability of the equipment.

Images