CN211680931U

CN211680931U - Five moving beam type portal frames

Info

Publication number: CN211680931U
Application number: CN201922500394.8U
Authority: CN
Inventors: 王立民; 韩贤胜; 赛志尚
Original assignee: Yiteli Chuzhou Intelligent Numerical Control Technology Co ltd
Current assignee: Yiteli Chuzhou Intelligent Numerical Control Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-16
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a five-axis movable beam type portal frame, which relates to the field of gantry machine tools and comprises a main shaft ram, two beams and a slide seat, wherein the two ends of the two beams are connected into a rectangular structure through end plates, and the slide seat is provided with four sliding saddles enclosing into a rectangle; the sliding seat is movably arranged between the two cross beams along the extension direction of the cross beams, and the outer surfaces of two parallel saddle of the sliding seat are connected with the cross beams; the spindle ram is movably arranged in the sliding seat along the vertical direction and is connected with the inner surfaces of the other two parallel sliding saddles of the sliding seat. The utility model discloses a two crossbeam forms of frame center, main shaft ram self weight are lifted up by two roof beams, have solved the bending and the distortion that single horizontal structure produced under the effect of motion and dead weight and cutting force, have reduced the gross weight of crossbeam simultaneously, avoid the phenomenon of production vibration when high-speed to life has been prolonged.

Description

Five moving beam type portal frames

Technical Field

The utility model relates to a gantry machine tool field, concretely relates to five movable beam type portal frames.

Background

The five-axis moving beam type gantry machining center is a heavy, high-speed and high-precision machine tool product which is being developed and produced in China, and in order to meet the requirements of different types of users, the rigidity and cutting speed of a machine tool are required to be enhanced. The method adopted by the existing five-axis moving beam type gantry machining center is a single-beam structure with a spindle ram suspended outside a beam, and the single-beam structure adopted on the five-axis moving beam type gantry machining center has the following problems: 1. the cross beam has enlarged sectional area, self weight and cost; 2. the self weight is increased, the motion inertia is increased, and the electric drive needs to be increased at the same time; 3. the motion inertia is increased, the response speed of the motion is reduced (particularly in two-dimensional and three-dimensional interpolation cutting), and the motion precision and the cutting precision are reduced; 4. vibration is easily generated at high speed.

For the reasons, the total cost of the machine tool is increased by adopting a single-beam structure (in high-speed and high-precision cutting) in the five-axis moving beam type gantry machining center; the increase of the motion inertia further influences the precision of the machined part, reduces the service life of the five-axis moving beam gantry machining center and maintains the precision of the machine tool.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a five axle walking beam formula portal frames solve the bending and the distortion that single horizontal beam structure produced under the effect of motion and dead weight and cutting force, reduce the gross weight of crossbeam simultaneously, reduce and produce vibration phenomenon when high-speed, prolong five axle walking beam formula longmen machining center life.

The utility model discloses a five-axis walking beam type portal frame, including main shaft ram, crossbeam, slide, the quantity of crossbeam is two, and the both ends of two crossbeams connect into the rectangle structure through the end plate, the slide has four saddles that enclose into the rectangle; the sliding seat is movably arranged between the two cross beams along the extension direction of the cross beams, and the outer surfaces of two parallel saddle of the sliding seat are connected with the cross beams; the spindle ram is movably arranged in the sliding seat along the vertical direction and is connected with the inner surfaces of the other two parallel sliding saddles of the sliding seat. The five-axis moving beam type portal frame adopts a double-beam form of a frame middle frame, the main shaft ram is arranged between the two beams, the self weight of the main shaft ram is lifted up by the two beams, the self weight and the cutting force of the main shaft ram are prevented from generating torque on the beams, and the rigidity and the cutting precision of the main shaft ram in the vertical direction and the extending direction of the beams are ensured.

Further, the outer surface with two parallel saddles that the crossbeam is connected are the horizontal axis saddle, the inner surface with two parallel saddles in addition that the main shaft ram is connected are vertical axle saddle, install horizontal guide rail on the medial surface of two crossbeams respectively, install vertical guide rail on two parallel lateral surfaces of main shaft ram respectively, two horizontal axis saddles are installed symmetrically on the horizontal guide rail, two vertical axle saddles are installed symmetrically on the vertical guide rail. The horizontal shaft sliding saddle and the vertical shaft sliding saddle are connected to form a sliding seat, the self weight of the spindle sliding pillow is lifted by the two cross beams, and the spindle sliding pillow and cutting force are prevented from generating torque on the cross beams.

Furthermore, the verticality between the spindle ram and the horizontal guide rail is not more than 0.01mm, the parallelism between the vertical guide rails is not more than 0.01mm, and the straightness and the parallelism of the horizontal guide rail are not more than 0.01mm, so that the motion precision and the cutting precision of the spindle ram are ensured.

Furthermore, the internal rib plate of the cross beam adopts a combined structure of I-shaped ribs and vertical ribs, so that a larger bending moment can be borne, and the total rigidity of the support can be improved.

Further, the two cross beams are mounted on a cross beam saddle and can move in a horizontal direction perpendicular to the extending direction of the cross beams.

Compared with the prior art, the utility model has the advantages of as follows:

(1) by adopting a double-beam form of a frame-in-frame, under the condition of bearing the same weight of the main shaft ram, the structure is reduced, the weight of the beam is reduced, the motion inertia is reduced at the same time, the motion response speed is increased when two-dimensional and three-dimensional interpolation cutting is carried out, and the motion precision and the cutting precision are improved;

(2) the double-beam structure is adopted, the beam only has bending deformation errors, and the numerical control system is convenient and reliable in precision compensation, so that the design requirement of the machine tool is obtained, and the retentivity of the machine tool precision is improved;

(3) because the cross beam has no (or small) distortion error, the phenomenon of vibration generated at high speed is reduced, the machining precision is improved, and the service life of the five-axis moving beam type gantry machining center is prolonged.

Drawings

FIG. 1 is a schematic structural view of a single-beam gantry of the prior art;

fig. 2 is a schematic perspective view of the present invention;

fig. 3 is a front view of the present invention;

FIG. 4 is a view A-A of FIG. 3;

fig. 5 is a top view of the present invention;

reference numerals: 1. the device comprises a main shaft ram, 1-1 single cross beam, 2 front cross beam, 3 rear cross beam, 4 end plate, 5. X-axis saddle, 6. Y-axis front saddle, 7. Y-axis rear saddle, 8. Y-axis linear guide rail, 9. Z-axis linear guide rail, 10. Z-axis right saddle and 11. Z-axis left saddle.

Detailed Description

The invention is further described with reference to the following examples and the accompanying drawings.

A single-beam structure adopted by an existing five-axis moving beam type gantry machining center is shown in figure 1, and a main shaft ram 1 is suspended outside a single beam 1-1. The utility model discloses five moving beam formula longmen machining center lathe of mainly used. As shown in fig. 2, the utility model discloses a five moving beam formula portal frames include main shaft ram 1, front beam 2, rear frame member 3 and end plate 4, and in the middle of front beam 2 and rear frame member 3 were arranged in to main shaft ram 1, the both ends of front beam 2 and rear frame member 3 were connected with end plate 4 respectively.

As shown in fig. 3 and 4, both ends of the front beam 2 and the rear beam 3 are placed on an X-axis saddle 5 (i.e., a beam saddle) to be movable together in the X-axis direction (i.e., a horizontal direction perpendicular to the extending direction of the beams). Two horizontal Y-axis linear guide rails 8 are respectively arranged on the front cross beam 2 and the rear cross beam 3, a Y-axis front saddle 6 is arranged on the two Y-axis linear guide rails 8 of the front cross beam 2, and a Y-axis rear saddle 7 is arranged on the two Y-axis linear guide rails 8 of the rear cross beam 3.

As shown in fig. 5, two vertical Z-axis linear guide rails 9 are respectively installed on the left and right side surfaces of the main shaft ram 1, a Z-axis left saddle 11 is installed on the Z-axis linear guide rail 9 on the left side surface of the main shaft ram 1, and a Z-axis right saddle 10 is installed on the Z-axis linear guide rail 9 on the right side surface of the main shaft ram 1. Wherein, the Y-axis front saddle 6, the Y-axis rear saddle 7, the Z-axis right saddle 10 and the Z-axis left saddle 11 are respectively connected by bolts to form an integral sliding seat. Through the connection of the Z-axis saddle and the Y-axis saddle, the self weight of the main shaft ram is lifted by the two cross beams, so that the gravity and the cutting force of the main shaft ram are prevented from generating torque on the cross beams, and the motion rigidity and the cutting precision of the main shaft ram in the Y-axis direction (namely the extension direction of the cross beams) and the Z-axis direction (namely the vertical direction) are ensured. In order to ensure the bending resistance of the cross beam, the internal rib plates adopt the combination of I-shaped ribs and vertical ribs, can bear a larger bending moment, and can improve the total rigidity of the support, thereby improving the rigidity of the machine tool.

The installation method of the five-axis moving beam type portal frame comprises the following steps:

(1) firstly, respectively installing four Y-axis linear guide rails 8 on a front cross beam 2 and a rear cross beam 3 (two Y-axis linear guide rails are installed on each cross beam), respectively checking the two Y-axis linear guide rails 8 on the front cross beam 2 and the rear cross beam 3, and requiring that the straightness and the parallelism of the two Y-axis linear guide rails 8 are within the range of 0.01 mm;

(2) respectively installing a Y-axis front saddle 6 and a Y-axis rear saddle 7 on two Y-axis linear guide rails 8 of the front cross beam 2 and the rear cross beam 3, correcting and locking the Y-axis front saddle 6 and the Y-axis rear saddle 7 on the Y-axis linear guide rails 8 by using bolts to prevent the Y-axis front saddle 6 and the Y-axis rear saddle 7 from sliding in the following installation process, and dismantling the bolts after the installation is finished;

(3) respectively hanging the components consisting of the front cross beam 2 and the Y-axis front saddle 6 and the components consisting of the rear cross beam 3 and the Y-axis rear saddle 7 on the X-axis saddle 5, and installing the components on the X-axis saddle 5 in a face-to-face manner;

(4) four Z-axis linear guide rails 9 are respectively arranged on two parallel side surfaces of the main shaft ram 1, two Z-axis linear guide rails 9 are arranged on each side surface, and the parallelism of the four Z-axis linear guide rails 9 is corrected to be not more than 0.01 mm; respectively installing a Z-axis right saddle 10 and a Z-axis left saddle 11 on two Z-axis linear guide rails 9;

(5) hoisting an assembly consisting of a main shaft ram 1, a Z-axis right saddle 10 and a Z-axis left saddle 11 and placing the assembly between an assembly consisting of a front cross beam 2 and a Y-axis front saddle 6 and an assembly consisting of a rear cross beam 3 and a Y-axis rear saddle 7, and respectively connecting the Y-axis front saddle 6, the Y-axis rear saddle 7, the Z-axis right saddle 10 and the Z-axis left saddle 11 by bolts to form a rectangular frame; the verticality between the main shaft ram 1 and the Y-axis linear guide rail 8 is corrected to be not more than 0.01 mm;

(6) and finally, the two ends of the front cross beam 2 and the rear cross beam 3 are respectively connected by end plates 4, so that the two cross beams form a rectangular structure and form a structural form of a frame-in-frame with the sliding seat.

The above-described embodiments are only preferred embodiments of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several modifications and equivalent substitutions can be made, and these modifications and equivalent substitutions do not depart from the technical scope of the present invention.

Claims

1. A five-axis moving beam type portal frame comprises a main shaft ram, two beams and a sliding seat, and is characterized in that the number of the beams is two, two ends of the two beams are connected into a rectangular structure through end plates, and the sliding seat is provided with four sliding saddles enclosing into a rectangle; the sliding seat is movably arranged between the two cross beams along the extension direction of the cross beams, and the outer surfaces of two parallel saddle of the sliding seat are connected with the cross beams; the spindle ram is movably arranged in the sliding seat along the vertical direction and is connected with the inner surfaces of the other two parallel sliding saddles of the sliding seat.

2. The five-axis walking beam portal frame according to claim 1, wherein two parallel saddles attached to the beams on the outer surface are horizontal axis saddles, the other two parallel saddles attached to the main axis saddles on the inner surface are vertical axis saddles, horizontal guide rails are respectively installed on the inner side surfaces of the two beams, vertical guide rails are respectively installed on the two parallel outer side surfaces of the main axis saddles, the two horizontal axis saddles are symmetrically installed on the horizontal guide rails, and the two vertical axis saddles are symmetrically installed on the vertical guide rails.

3. The five-axis walking beam gantry of claim 2, wherein said spindle ram is not more than 0.01mm perpendicular to said horizontal rail.

4. The five-axis walking beam gantry of claim 2, wherein said vertical rails are parallel to each other by no more than 0.01 mm.

5. The five-axis walking beam gantry of claim 2, wherein said horizontal rail has a straightness and parallelism that do not exceed 0.01 mm.

6. The five-shaft walking beam type portal frame according to any one of claims 1 to 5, wherein the inner rib plate of the cross beam is of a combined structure of I-shaped ribs and vertical ribs.

7. The five-axis walking beam gantry of any one of claims 1 to 5, wherein two beams are mounted on a beam saddle and are movable in a horizontal direction perpendicular to the extension direction of said beams.