Double-gantry numerical control machining center

Abstract

The utility model discloses a double-gantry numerical control machining center which comprises a base and a spindle head and further comprises two portal frames which are vertically arranged in parallel, a top frame is fixedly installed at the upper ends of the portal frames, a two-axis linear module is installed on the top frame, the spindle head is installed on a sliding table of the two-axis linear module, symmetrical sliding rails a are installed on the two sides of the base, and sliding rails b are installed on the sliding rails a. The inner side of the lower end of the portal frame is slidably connected with the sliding rail a, vertical sliding rails b are symmetrically installed on the inner side of the portal frame, a collecting box capable of vertically sliding is installed between the two sliding rails b and pushed by an air cylinder installed on the top of the portal frame, an opening is formed in the lower end of the collecting box inwards, a brush roller is installed at the opening, and an inclined block is arranged at the bottom of an inner cavity of the collecting box. Due to the arrangement of a double-gantry structure, load distribution is uniform, load deformation of the gantry is greatly reduced, debugging is convenient, and machining precision can be improved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of machining centers, in particular to a double-gantry CNC machining center. Background Art

[0002] A gantry machining center (GMT) is a machining center in which the spindle axis is perpendicular to the worktable. It is primarily suitable for machining large parts. With the rapid development of the machinery manufacturing industry, gantry machining centers have been widely used in the machining field. Existing gantry machining centers are mostly single-gantry structures, with the spindle head mounted on one side of the gantry. This means the load on the gantry is primarily concentrated on one side, making the gantry prone to rigid deformation. Once this occurs, rigid deformation affects the perpendicularity between the spindle axis and the worktable, making debugging difficult. Utility Model Content

[0003] The purpose of the utility model is to provide a double gantry CNC machining center to solve the problems raised in the above background technology.

[0004] Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

[0005] Preferably, a rack parallel to the slide rail a is installed on the side of the base, an inward-facing servo motor is installed at the lower end of the gantry, a drive gear is installed on the output shaft of the servo motor, and the drive gear is engaged with the rack.

[0006] Preferably, a chip collecting chamber is formed between the rear side of the inclined block and the bottom of the collecting box, and chip discharge ports are provided at both ends of the chip collecting chamber.

[0007] Preferably, the outer side of the roller is covered with rubber, and the number of teeth of gear a is greater than three times the number of teeth of gear b.

[0008] Compared with existing technologies, the present invention offers the following advantages: a dual-gantry structure provides even load distribution, significantly reducing gantry deformation under load, facilitating commissioning, and improving machining accuracy. As the collection box moves downward and along the tabletop, the rotating brush roller collects the chips into the chip collection chamber at the rear, facilitating cleaning of the machining surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the installation of the gantry and the base;

[0011] Figure 3 It is a schematic diagram of the side section structure of the collection box.

[0012] In the figure: 1. Base; 2. Slide rail a; 3. Rack; 4. Gantry; 5. Top frame; 6. Spindle head; 7. Cylinder; 8. Slide rail b; 9. Collection box; 10. Roller; 11. Brush roller; 12. Inclined block; 13. Chip collection chamber; 14. Drive gear. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] See also Figure 1-3 The utility model provides a technical solution: a double gantry CNC machining center, including a base 1 and a spindle head 6, and also includes two vertically parallel gantries 4, the upper end of the gantry 4 is fixedly mounted with a top frame 5, the top frame 5 is mounted with a two-axis linear module, the spindle head 6 is mounted on the slide of the two-axis linear module, symmetrical slide rails a2 are mounted on both sides of the base 1, the inner side of the lower end of the gantry 4 is slidably connected to the slide rail a2, the side of the base 1 is mounted with a rack 3 parallel to the slide rail a2, the lower end of the gantry 4 is mounted with an inward servo motor, the output shaft of the servo motor is mounted with a drive gear 14, the drive gear 14 is engaged with the rack 3, and the servo motor is used to drive the gantry 4 to move linearly along the slide rail a2. The double gantry structure makes the force more uniform, reduces the deformation of the gantry 4, facilitates debugging, and improves machining accuracy.

[0015] Vertical slide rails b8 are symmetrically installed on the inner side of the gantry 4, and a vertically sliding collection box 9 is installed between the two slide rails b8. The collection box 9 is pushed by the cylinder 7 installed on the top of the gantry 4. The lower end of the collection box 9 is provided with an opening facing inward, and a brush roller 11 is installed at the opening. An inclined block 12 is provided at the bottom of the inner cavity of the collection box 9, and the inclined block 12 is located behind the brush roller 11. A chip collection chamber 13 is formed between the rear side of the inclined block 12 and the bottom of the collection box 9. A chip collection chamber 13 is formed between the rear side of the inclined block 12 and the bottom of the collection box 9. The brush roller 11 contacts the table surface after being pressed down, and the rotation of the brush roller 11 can sweep the chips backwards.

[0016] Both ends of the chip collection chamber 13 are provided with chip discharge ports, and the chip discharge ports are sealed with end covers. The chip discharge ports are connected to negative pressure suction to discharge the cutting chips. Rollers 10 are respectively installed on both sides of the collection box 9. A concentric gear a is fixedly installed on the inner side of the roller 10 (the outline diameter of the gear a is smaller than the diameter of the roller 10), and a gear b is fixedly installed on the end of the brush roller 11. The gear a and the gear b are transmitted through an idle gear to ensure that the gear a and the gear b rotate in the same direction. The number of teeth of gear a is greater than three times the number of teeth of gear b. After the collection box 9 moves down, the roller 10 contacts the table surface, and the lateral movement of the gantry 4 can make the roller 10 roll on the table surface. The brush roller 11 rotates with the roller 10 and increases the speed. The bristles on the brush roller 11 sweep the chips into the chip collection chamber 13.

[0017] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double gantry CNC machining center, comprising a base (1) and a spindle head (6), characterized in that: The machine also includes two vertically parallel gantries (4), the upper end of the gantry (4) is fixedly mounted with a top frame (5), a two-axis linear module is mounted on the top frame (5), the spindle head (6) is mounted on the slide of the two-axis linear module, symmetrical slide rails a (2) are mounted on both sides of the base (1), the inner side of the lower end of the gantry (4) is slidably connected to the slide rail a (2), the inner side of the gantry (4) is symmetrically mounted with vertical slide rails b (8), a vertically slidable collection box (9) is mounted between the two slide rails b (8), and the collection box (9) is provided with a plurality of vertically slidable collection boxes. The collecting box (9) is pushed by a cylinder (7) installed on the top of the gantry (4). The lower end of the collecting box (9) is provided with an opening facing inward, and a brush roller (11) is installed at the opening. The bottom of the inner cavity of the collecting box (9) is provided with an inclined block (12), and the inclined block (12) is located behind the brush roller (11). Rollers (10) are respectively installed on both sides of the collecting box (9). A concentric gear a is fixedly installed on the inner side of the roller (10). A gear b is fixedly installed on the end of the brush roller (11). The gear a and the gear b are driven by an idler gear.

2. A double gantry CNC machining center according to claim 1, characterized in that: A rack (3) parallel to the slide rail a (2) is installed on the side of the base (1); an inward-facing servo motor is installed at the lower end of the gantry (4); a driving gear (14) is installed on the output shaft of the servo motor; and the driving gear (14) is meshed with the rack (3).

3. The double gantry CNC machining center according to claim 1, characterized in that: A chip collecting chamber (13) is formed between the rear side of the inclined block (12) and the bottom of the collecting box (9), and chip discharge ports are provided at both ends of the chip collecting chamber (13).

4. The double gantry CNC machining center according to claim 1, characterized in that: The outer side of the roller (10) is covered with rubber, and the number of teeth of gear a is greater than three times the number of teeth of gear b.

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