Numerical control gantry multi-axis combined machining center

Abstract

The utility model discloses a numerical control gantry multi-axis combined machining center, which relates to the technical field of gantry machining centers, and comprises a base, a workbench is arranged on the base, a left stand column and a right stand column are respectively arranged on two sides of the base, sliding units are respectively arranged on the left stand column and the right stand column, and a cross beam is arranged between the left stand column and the right stand column. A left ram and a right ram are arranged on the cross beam in a sliding mode, a left tool rest is arranged on the left ram in a sliding mode, a right tool rest is arranged on the right ram in a sliding mode, rotating units are arranged in the left tool rest and the right tool rest respectively, tool clamps are arranged on the rotating units, and the tool clamps are used for clamping tools and replacing angle milling heads. A transverse driving unit for driving the left ram and the right ram to slide oppositely is arranged on the cross beam; the left ram and the right ram are respectively provided with a vertical driving unit used for controlling the left tool rest and the right tool rest to vertically slide, and the left tool rest and the right tool rest are arranged on the cross beam, so that the workpiece machining efficiency and precision are improved, and the labor intensity of workers is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gantry machining center technical field especially relates to a kind of numerical control gantry multi-axis composite machining center. BACKGROUND

[0002] Gantry machining center refers to the axis of main shaft Z axis and worktable vertical setting's machining center, overall structure is by double column and roof beam constitute door type structure frame's large-scale machining center machine, double column also have crossbeam in the middle.Especially suitable for processing large workpiece and complex workpiece.

[0003] The existing invention patent with publication number CN 107695794 A and publication date of February 16, 2018 discloses a numerical control machining center, comprising a bed, a segmented T-shaped groove platform, a left column, a right column, a crossbeam, a slide saddle, a protective door, a tool magazine, a machine head, an operating platform and an electrical control box; the bed is composed of a left support frame, a right support frame, a bottom support frame and a machining mounting frame; the bottom of the left support frame and the right support frame is respectively connected to the left and right sides of the bottom support frame, and the machining mounting frame is connected to the top of the left support frame and the right support frame; the machining mounting frame is a grid-shaped metal frame; the segmented T-shaped groove platform is arranged on the top of the machining mounting frame; the segmented T-shaped groove platform is composed of a plurality of installation positioning rods, and each installation positioning rod is arranged above the machining mounting frame at equal intervals from left to right.

[0004] The left column and the right column bear the gravity of the crossbeam, the slide saddle, the machine head and the tool magazine

[0005] and the gravity of the crossbeam can be balanced to some extent, so that the overall gravity of the crossbeam, the slide saddle, the machine head and the tool magazine falls on the left column and the right column, and the moment of force on the left column and the right column is small or even nonexistent, so the left column and the right column are stable in structure and are not prone to shaking during movement.

[0006] However, the following problems exist in this type of gantry machining center:

[0007] 1. This type of gantry machining center only has one milling head for machining, and for complex parts and machining processes, the tool needs to be frequently replaced for each plane, the machining efficiency is low, and the labor intensity is high;

[0008] 2. For the traditional gantry machining center, when machining multiple planes of a part, the workpiece needs to be adjusted or turned over multiple times for different machining planes, and the workpiece needs to be re-measured and aligned after each plane is adjusted, which is very low in machining efficiency, requires high operation and alignment ability of the operator, and it is difficult to ensure the machining accuracy of the workpiece;

[0009] 3. For irregular parts or large plate parts, where the workpiece cannot be reversed, traditional machine tools can only use angle milling heads for auxiliary processing. It is well known that angle milling heads have poor shock resistance and a relatively small cutting capacity. In addition, milling head disassembly is more troublesome, which wastes labor costs and the purchase cost of milling heads is also high.

[0010] 4. For gearbox and gearbox parts, the relative accuracy requirements of each shaft hole are relatively high. Once the workpiece is moved, the verticality and parallelism are difficult to control;

[0011] 5. For heavy parts, moving or reversing the workpiece requires high labor intensity, low operational safety factor, and high mechanical and manual operation costs;

[0012] 6. When processing deep cavity workpieces or long groove workpieces, the size can only be controlled by the ram lifting and lowering. At this time, the ram is prone to interference, resulting in the inability to process small-sized cavities. When processing large-hole deep cavities, as the ram descends, the ram overhang is too long, which will cause the seismic performance of the machine tool to be greatly reduced, resulting in uneven cutting, poor processing accuracy, and accelerated machine tool wear.

[0013] Therefore, there is an urgent need for a CNC gantry multi-axis composite machining center to improve the machining efficiency and precision of workpieces, reduce the labor intensity of staff and the procurement cost of milling heads. Utility Model Content

[0014] In response to the above technical problems, the utility model provides a CNC gantry multi-axis compound machining center, which is used to solve the problems that the existing CNC gantry machining center uses a single milling head, which needs to be frequently replaced, resulting in low machining efficiency, and the workpiece needs to be frequently flipped, resulting in high labor intensity for the staff and low precision.

[0015] The above technical objectives of the present invention are achieved through the following technical solutions:

[0016] A CNC gantry multi-axis composite machining center includes a body, a base, a workbench provided on the base, a left column and a right column provided on both sides of the base, a sliding unit provided on each of the left column and the right column, a crossbeam provided between the left column and the right column, a left ram and a right ram provided on the crossbeam for sliding movement, a left tool holder provided on the left ram for sliding movement, a right tool holder provided on the right ram for sliding movement, a rotating unit provided in each of the left and right tool holders, a tool holder provided on each of the rotating units for clamping a tool and replacing an angle milling head;

[0017] The crossbeam is provided with a transverse driving unit for driving the left ram and the right ram to slide toward each other;

[0018] The left ram and the right ram are both provided with vertical driving units for controlling the vertical sliding of the left tool holder and the right tool holder.

[0019] Further, the transverse driving unit comprises at least one transverse driving motor, and a transverse sliding rail, and the output end of the transverse driving motor is provided with a transverse screw rod which is threadedly matched with the left slide block and the right slide block respectively.

[0020] Further, the vertical driving unit comprises a vertical driving motor and a vertical sliding rail, and the output end of the vertical driving motor is provided with a vertical screw rod which is threadedly matched with the left tool holder and the right tool holder respectively.

[0021] Further, the left tool holder and the right tool holder are provided with connecting ears on two sides, the connecting ears are provided with guide rods, and the left slide block and the right slide block are provided with guide holes corresponding to the positions of the guide rods.

[0022] Further, the left slide block and the right slide block are the same in structure, and are provided with mounting portions and overlapping portions, and the overlapping portions are slidably overlapped on the top of the cross beam through the transverse sliding rail.

[0023] Further, the left tool holder and the right tool holder are both box-shaped structures.

[0024] Therefore, the utility model has the beneficial technical effects that:

[0025] (1) the left tool holder and the right tool holder are slidably arranged on the cross beam, different types of cutters can be simultaneously arranged on the left tool holder and the right tool holder, so that the cutters do not need to be frequently replaced during machining, the process and time of cutter replacement are saved, the left vertical column and the right vertical column provide longitudinal driving force for the cutters, the transverse driving unit provides transverse driving force for the cutters, the cutters are more powerful and stable during feeding, the anti-vibration performance is better than that of an angle milling head, the machining is more stable, the workpiece does not need to be frequently turned over after one side is machined, one-time clamping and one-time machining of multiple processes are realized, the workpiece remains stationary, the machining precision is effectively improved, the operation strength is reduced, for heavy parts, the design scheme can realize one-time clamping and one-time machining, does not need to rely on external tools such as a crown block and a crane for multiple high-risk reversals, improves the safety factor of machining, reduces the safety hazard of machining, and reduces the damage hazard of the machine tool and the personnel casualty hazard. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the overall structure of the utility model;

[0027] Figure 2 is Figure 1 is a schematic view of another angle;

[0028] Figure 3 is Figure 1 is a schematic view of the structure of the protective sleeve hidden;

[0029] Figure 4 yes Figure 1 A magnified schematic diagram of part A;

[0030] Figure 5 yes Figure 3 An enlarged schematic diagram of part B.

[0031] Figure numerals: 1. base; 2. workbench; 3. left column; 4. right column; 5. sliding unit; 6. crossbeam; 7. left slide; 8. right slide; 9. left tool holder; 10. right tool holder; 11. tool clamp; 12. horizontal drive motor; 13. horizontal slide rail; 14. horizontal lead screw; 15. vertical drive motor; 16. vertical slide rail; 17. rotating unit; 18. connecting ear; 19. guide rod; 20. mounting portion; 21. overlapping portion. DETAILED DESCRIPTION

[0032] The present invention will be described clearly and completely below with reference to the embodiments.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances.

[0035] See attached Figures 1-5 , shown is a CNC gantry multi-axis compound machining center, comprising a base 1, a workbench 2 for fixing a workpiece is provided on the top of the base 1, a left column 3 and a right column 4 are provided on both sides of the base 1, and a sliding unit 5 is provided on the left column 3 and the right column 4. The sliding unit 5 mainly includes a gearbox, which is driven by the gearbox to realize the sliding of the left column 3 and the right column 4 along the base 1 and control the feed of the tool in the longitudinal direction;

[0036] A cross beam 6 is arranged between the left upright column 3 and the right upright column 4, the cross beam 6 is provided with a transverse driving unit, the transverse driving unit comprises two transverse sliding rails 13 and two transverse driving motors 12, one of the two transverse sliding rails 13 is arranged on the top wall of the cross beam 6, the other transverse sliding rail 13 is arranged on the lateral wall of the cross beam 6, the transverse driving motor 12 is arranged on the lateral wall of the cross beam 6, and the output end of the transverse driving motor 12 is provided with a transverse lead screw 14, the screw thread directions of the transverse lead screws 14 are symmetrically arranged, the cross beam 6 is slidably provided with a left slide block 7 and a right slide block 8 through the transverse sliding rails 13, and the left slide block 7 and the right slide block 8 are respectively in threaded connection with the transverse lead screws 14; in use, the left slide block 7 and the right slide block 8 are driven to move along the transverse sliding rails 13 by the transverse driving motor 12 through the transverse lead screws 14.

[0037] Further, in order to reduce the load of the left slide block 7 and the right slide block 8 on the transverse sliding rails 13, the left slide block 7 and the right slide block 8 are both provided with a mounting portion 20 and a lapping portion 21, the mounting portion 20 is matched with the transverse sliding rail 13 arranged on the lateral wall of the cross beam 6, and the lapping portion 21 is matched with the transverse sliding rail 13 arranged on the top wall of the cross beam 6, so that the left slide block 7 and the right slide block 8 can share the weight on the cross beam 6, and the stability on the cross beam 6 is improved.

[0038] The left slide block 7 is slidably provided with a left tool holder 9, the right slide block 8 is slidably provided with a right tool holder 10, and the left slide block 7 and the right slide block 8 are respectively provided with a vertical driving unit for controlling the vertical sliding of the left tool holder 9 and the right tool holder 10, the vertical driving unit comprises a vertical driving motor 15 and a vertical sliding rail 16, and in use, the left tool holder 9 and the right tool holder 10 are respectively controlled to slide along the vertical sliding rail 16 by the vertical driving motor 15.

[0039] The left tool holder 9 and the right tool holder 10 are both box-shaped structures, and are both internally provided with a rotating unit 17, the rotating unit 17 comprises a speed reducer and a main shaft, the main shaft is connected with a tool holder 11 at one end, and different types of tools are installed through the tool holder 11 in use.

[0040] Therefore, the utility model has the advantages that: the left tool holder 9 and the right tool holder 10 are slidably arranged on the cross beam 6, the load bearing body of the tool is increased, the tool does not need to be frequently replaced during the machining of the workpiece, the left tool holder 9 and the right tool holder 10 are provided with different tools through the tool holder 11, and the tools are simultaneously machined on both sides of the workpiece under the driving of the transverse driving motor 12 and the vertical driving motor 15, the machining efficiency of the workpiece is improved, the workpiece does not need to be frequently turned over during the machining process, the position deviation caused by each turning over is avoided, the machining precision is ensured, the multi-surface machining problem of heavy, large and non-reversible workpieces is solved, the equipment does not need to be additionally assisted by an angle milling head and other equipment, the single equipment meets the large size tool and heavy cutting requirement, the machining efficiency is improved, the manual intervention is reduced, and the operation intensity of the operator is reduced.

[0041] Meanwhile, the vertical driving motor 15 is used to control the left tool holder 9 and the right tool holder 10 to ascend and descend, the deep cavity machining requirement is met, the ram machining interference is effectively avoided, the machining stability is improved, and the machining range and the machining performance of the machine tool are expanded.

[0042] The above merely describes a preferred specific implementation of the present application, and is not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A numerical control gantry multi-axis hybrid machining center, comprising a base (1), a worktable (2) is arranged on the base (1), left and right side columns (3) and (4) are arranged on both sides of the base (1) respectively, and a sliding unit (5) is arranged on each of the left and right side columns (3) and (4) respectively, characterized in that: The left upright column (3) and the right upright column (4) are provided with a cross beam (6), the cross beam (6) is slidably provided with a left slide saddle (7) and a right slide saddle (8), the left slide saddle (7) is slidably provided with a left tool holder (9), the right slide saddle (8) is slidably provided with a right tool holder (10), the left tool holder (9) and the right tool holder (10) are both provided with a rotating unit (17), the rotating unit (17) is provided with a tool clamp (11), the tool clamp (11) is used for clamping a tool, and an angle milling head is replaced; The cross beam (6) is provided with a transverse driving unit for driving the left slide saddle (7) and the right slide saddle (8) to slide towards each other; The left slide saddle (7) and the right slide saddle (8) are both provided with a vertical driving unit for controlling the vertical sliding of the left tool holder (9) and the right tool holder (10); The transverse driving unit includes two transverse sliding rails 13 and two transverse driving motors 12, one of the transverse sliding rails 13 is installed on the top wall of the cross beam 6, the other transverse sliding rail 13 is installed on the lateral side wall, the transverse driving motor 12 is installed on the side wall of the cross beam 6, and the output end of the transverse driving motor 12 is provided with a transverse lead screw 14, the screw threads on the transverse lead screw 14 are symmetrically arranged, the cross beam 6 is slidably provided with the left slide saddle 7 and the right slide saddle 8 through the transverse sliding rail 13, and one side of the left slide saddle 7 and the right slide saddle 8 is respectively threadedly connected with the transverse lead screw 14.

2. The multi-axis hybrid machining center of claim 1, wherein: The vertical driving unit includes a vertical driving motor (15) and a vertical sliding rail (16), the output end of the vertical driving motor (15) is provided with a vertical lead screw, and the vertical lead screw is threadedly connected with the left tool holder (9) and the right tool holder (10) respectively.

3. The multi-axis hybrid machining center of claim 1, wherein: The left tool holder (9) and the right tool holder (10) are both provided with a connecting lug (18), the connecting lug (18) is installed with a guide rod (19), and the left slide saddle (7) and the right slide saddle (8) are provided with guide holes corresponding to the positions of the guide rods (19).

4. The multi-axis hybrid machining center of claim 1, wherein: The left slide saddle (7) and the right slide saddle (8) are the same structure, and are both provided with a mounting portion (20) and a lapping portion (21), and the lapping portion (21) is slidably lapped on the top of the cross beam (6) through the transverse sliding rail (13).

5. The multi-axis hybrid machining center of claim 1, wherein: The left tool holder (9) and the right tool holder (10) are both box-shaped structures.

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