Slide carriage ball screw supporting device of numerical control gantry boring and milling machining center

Abstract

The utility model discloses a ball screw supporting device for a slide carriage of a numerical control gantry boring and milling machining center, which belongs to the technical field of numerical control gantry boring and milling machining centers and comprises a mounting seat connected with a cross beam, a hydraulic cylinder is connected and mounted on the mounting seat, and a telescopic end of the hydraulic cylinder is connected with a supporting seat slidably mounted in the mounting seat in a telescopic manner. The end, away from the hydraulic cylinder, of the supporting base can support the middle of the lead screw. The hydraulic cylinder is controlled to stretch out and draw back, telescopic adjustment of the supporting base on the mounting base is achieved, and flexible supporting of the lead screw is achieved; when the slide carriage works at the two ends, the supporting base stretches out, and four-point supporting of the lead screw is achieved through the lead screw base, the slide carriage and the supporting base at the two ends. When the slide carriage works in the middle, the hydraulic cylinder retracts, and three-point supporting of the lead screw is achieved through the lead screw bases at the two ends and the slide carriage. The unsupported span of the lead screw is greatly reduced, the deformation of the lead screw is reduced, the stability of the lead screw is improved, the transmission efficiency is improved, and the workpiece machining precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to numerical control gantry boring and milling machining center technical field, specifically a numerical control gantry boring and milling machining center slide plate ball screw support device. BACKGROUND

[0002] Numerical control gantry boring and milling machining center is a kind of highly automated, multifunctional numerical control machine tool, is widely used in the field of machining.It combines the functions of milling machine, boring machine and drilling machine, can complete multiple processes such as milling, boring, drilling, etc., is suitable for precision machining of complex parts.

[0003] Numerical control gantry boring and milling machining center has the following characteristics:

[0004] 1, high precision and high stability: the pulse equivalent of numerical control device is generally 0.001mm, and the high-precision numerical control system can even reach 0.1 μm, which avoids the operation error of operator and ensures the stable and reliable machining quality.

[0005] 2, strong adaptability: it can process parts with complex contour shape or difficult to control size, such as mold parts, shell parts, etc., and can also process complex curves and three-dimensional space curved surface parts that ordinary machine tools cannot handle.

[0006] 3, high production efficiency: since special fixtures and other process equipment are not needed, only the machining program stored in the numerical control device needs to be called when changing workpieces, which greatly shortens the production cycle.

[0007] 4, high degree of automation: the production automation degree is high, which can reduce the labor intensity of operator and is beneficial to production management automation.

[0008] 5, multi-functionality: numerical control gantry boring and milling machining center is usually equipped with automatic tool changer, which can continuously complete multiple processes after clamping once, and the process is highly concentrated.

[0009] The production of some super large parts also puts new requirements on the size (crossbeam) of numerical control gantry boring and milling machining center. With the increase of size, the working stroke of the existing machining center increases, and the screw of the transmission part of the slide plate also becomes longer. The increase of screw length increases its deflection during work, which has a negative impact on the transmission of the slide plate, and further affects the machining accuracy and efficiency of the machining center. INVENTION CONTENTS

[0010] The utility model provides a kind of ball screw support device of slide plate of numerical control gantry boring and milling machining center to solve the problem that the existing numerical control gantry boring and milling machining center slide plate transmission component screw is longer and longer, the increase of screw length brings the increase of its deflection in working process, which adversely affects the slide plate transmission, and further affects the machining precision and efficiency.

[0011] The utility model is realized by the following technical solutions:

[0012] A kind of ball screw support device of slide plate of numerical control gantry boring and milling machining center, numerical control gantry boring and milling machining center includes beam and slide plate, beam both ends are equipped with screw rod seat, two screw rod seats are rotatably installed with screw rod, slide plate is connected and is equipped with screw nut matched with screw rod, support device includes the mounting seat connected and installed with beam, mounting seat is connected and installed with hydraulic cylinder, the support seat of hydraulic cylinder telescopic end is connected with sliding telescopic installation in mounting seat, the end of support seat away from hydraulic cylinder can support middle part of screw rod.

[0013] Further improvement of the utility model still has, mounting seat is equipped with the connecting sleeve that can guide the sliding of support seat inside.

[0014] Further improvement of the utility model still has, the end of mounting seat away from screw rod is connected and installed with connecting plate, the cylinder body of hydraulic cylinder is positioned and connected on connecting plate, and the telescopic shaft of hydraulic cylinder slidingly penetrates connecting plate.

[0015] Further improvement of the utility model still has, the end of support seat close to screw rod is equipped with the support pad that can butt joint support screw rod.

[0016] Further improvement of the utility model still has, the end of support seat close to screw rod is equipped with the support pad that can butt joint support screw rod.

[0017] Further improvement of the utility model still has, the end of support seat close to screw rod is equipped with the support pad that can butt joint support screw rod.

[0018] Further improvement of the utility model still has, the support pad of inclined setting and horizontal angle is 15 degrees, and can be supported to screw rod obliquely upwards.

[0019] Further improvement of the utility model still has, mounting seat is equipped with the limit switch for limiting the telescopic stroke of support seat.

[0020] Further improvement of the utility model still has, beam is equipped with the travel switch for detecting the position of slide plate.

[0021] Further improvement of the utility model still has, beam includes beam body, and beam body is arranged with the static pressure guide rail that guides the sliding of slide plate, and slide plate is installed with the pressing plate that can extrude brake static pressure guide rail.

[0022] From the above technical scheme can be seen, the beneficial effects of the utility model are:

[0023] Through the hydraulic system control hydraulic cylinder extension and retraction action, thereby realizing the telescopic adjustment of the support seat on the mounting seat, realizing the flexible support of the lead screw;When the slide plate works at both ends, the hydraulic cylinder drives the support seat to extend, and the four-point support of the lead screw is realized through the lead screw seat, the slide plate and the support seat at both ends;When the slide plate works near the support device, the hydraulic cylinder is retracted, and the three-point support of the lead screw is realized through the lead screw seat and the slide plate at both ends;The unsupported span of the lead screw is greatly reduced, the deformation of the lead screw is reduced, the stability of the lead screw is increased, the transmission efficiency is improved, and the workpiece machining precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0025] Figure 1 It is the layout schematic view of the specific embodiment of the utility model.

[0026] Figure 2 It is the support device structure schematic view of the specific embodiment of the utility model.

[0027] Figure 3 It is the travel switch layout schematic view of the specific embodiment of the utility model.

[0028] Figure 4 It is the working process schematic view of the specific embodiment of the utility model.

[0029] In the drawings: 1-beam, 11-beam body, 12-static pressure guide rail, 13-roller screw, 14-screw seat, 15-pressing plate, 2-slide plate, 3-support device, 31-hydraulic cylinder, 32-support seat, 33-mounting seat, 34-connection sleeve, 35-connection plate, 36-support pad, 37-limit switch, 38-hydraulic system, 39-travel switch. DETAILED DESCRIPTION

[0030] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be described clearly and completely in combination with the drawings in the specific embodiments. Obviously, the following described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the patent.

[0031] In the prior art, the numerical control gantry boring and milling machining center comprises a cross beam 1 in the Y-axis direction (left and right) and a slide plate 2, the cross beam 1 is provided with screw rod seats 14 at both ends, ball screws 13 are installed between the two screw rod seats 14, the ball screws 13 comprise screw rods and screw nuts connected and installed with the slide plate 2, the screw nuts and the screw rods are in threaded cooperation; the slide plate 2 is provided with a slide block which can be adjusted along the Z-axis direction, and a machining tool head is installed at the lower end of the slide block.

[0032] As shown in Figures 1-4 The utility model discloses a numerical control gantry boring and milling machining center slide plate ball screw supporting device, the supporting device includes the installation seat 33 connected with the cross beam 1, the installation seat 33 is connected with the hydraulic cylinder 31 in the X-axis direction, the hydraulic cylinder 31 is connected with the support seat 32 that slides and telescopes (X-axis direction) is installed in the installation seat 33, and one end of the support seat 32 away from the hydraulic cylinder 31 can support the middle part of the screw rod.

[0033] The telescopic action of the hydraulic cylinder 31 is controlled through the hydraulic system 38, so that the telescopic adjustment of the support seat 32 in the installation seat 33 is realized, and flexible support of the screw rod is realized; when the slide plate 2 works at both ends, the support seat 32 is driven out by the hydraulic cylinder 31, and four-point support of the screw rod is realized through the screw rod seats 14 at both ends, the slide plate 2 (the sliding block cooperates with the static pressure guide rail 12) and the support seat 32; when the slide plate 2 works near the supporting device 3 (the middle segment of the cross beam 1), the hydraulic cylinder 31 is retracted, and three-point support of the screw rod is realized through the screw rod seats 14 at both ends and the slide plate 2 (the sliding block cooperates with the static pressure guide rail 12); the unsupported span of the screw rod is greatly reduced, the deformation of the screw rod is reduced, the stability of the screw rod is increased, the transmission efficiency is improved, and the machining precision of the workpiece is improved. The overall structure is simple, easy to realize and good in practicality.

[0034] The end (front end) of the support seat 32 close to the screw rod is provided with a support pad 36 capable of abutting and supporting the screw rod. The screw rod is effectively prevented from being abraded by abutting and supporting the screw rod through the support pad 36, the support pad 36 can be made of rubber and is a disposable consumable, which can be directly replaced when damaged.

[0035] Furthermore, the support base 32 has a notch along its upper edge near the lead screw (front end) that fits the lead screw, and a horizontal support pad 36 is provided at the bottom of the notch. The horizontal support pad 36 at the bottom of the notch can effectively achieve reliable and stable support for the lead screw and reduce deformation.

[0036] Furthermore, an inclined support pad 36 is provided on the rear side of the notch. The inclined support pad 36 forms a 15-degree angle with the horizontal and can provide oblique upward support for the lead screw. This achieves two-way abutment support for the lead screw, improving the reliability and stability of the support.

[0037] The mounting base 33 contains a connecting sleeve 34 that guides the support base 32 in a sliding manner, thus achieving precise sliding guidance of the support base 32 (in the X-axis direction).

[0038] The mounting base 33 has a cylindrical structure, with a connecting plate 35 connected to its end away from the lead screw (rear end). The front end of the hydraulic cylinder 31 is positioned and connected to the connecting plate 35, and the telescopic axis of the hydraulic cylinder 31 slides forward through the connecting plate 35. This ensures a reliable connection and installation of the hydraulic cylinder 31, and effectively guarantees a sufficiently long telescopic stroke for the support base 32.

[0039] The mounting base 33 is equipped with a limit switch 37 to limit the extension and retraction of the support base 32. The limit switch 37 detects and limits the extension and retraction of the support base 32 to ensure the reliability and accuracy of the support base 32 in supporting the lead screw, and to ensure that the support base 32 retracts into place.

[0040] The crossbeam 1 is equipped with a limit switch 39 for detecting the position of the slide 2. This enables automated control, improves the reliability and convenience of operation, and avoids interference between the support 32 and the nut on the slide 2.

[0041] The crossbeam 1 includes a beam body 11, on which two (upper and lower) hydrostatic guide rails 12 are arranged along its length to guide the sliding plate 2 (on which a slider is mounted). A pressure plate 15 is mounted on the slide plate 2 to compress and brake the hydrostatic guide rails 12. By pushing the pressure plate 15 forward (equivalent to a brake pad) through a braking device, the pressure plate 15 is tightly fitted against the rear side of the hydrostatic guide rail 12, thus achieving the braking effect.

[0042] The specific steps for using it are as follows (taking right to left as an example):

[0043] S1: Slide 2 moves from right to left. When the left side of slide 2 enters the auxiliary support return area ( Figure 4 When the right side (S1) is in the middle, the limit switch 39 detects a signal, and the control system issues a command to retract the auxiliary support (support seat 32). The hydraulic cylinder 31 retracts, causing the support seat 32 to disconnect from the lead screw.

[0044] S2: Slide 2 continues to move to the left, when it enters the area where the auxiliary support has no return and requires emergency braking ( Figure 4 When the right side (S2) is in the middle, if the limit switch 37 does not have a return signal, it means that the auxiliary support (support seat 32) has not returned correctly. The control system will issue a braking command and brake the slide (by pressing the static pressure guide rail 12 through the pressure plate 15). If the limit switch 37 has a return signal, it means that the auxiliary support has returned. The slide 2 will continue to move to the left.

[0045] S3: Slide 2 continues to move to the left, when slide 2 leaves the left auxiliary support and returns to the area ( Figure 4 When the left side (S1) is in the middle, the limit switch 39 signal disappears, the control system issues an auxiliary support command, and the support seat 32 extends to contact the lead screw for support.

[0046] This CNC gantry milling machining center's slide ball screw support device uses a hydraulic system 38 to control the extension and retraction of a hydraulic cylinder 31, thereby adjusting the extension and retraction of the support seat 32 on the mounting base 33 and providing flexible support for the screw. When the slide 2 is working at both ends, the hydraulic cylinder 31 drives the support seat 32 to extend, achieving four-point support for the screw through the screw seats 14 at both ends, the slide 2 (with the slider and hydrostatic guide rail 12), and the support seat 32. When the slide 2 is working near the support device 3 (the middle section of the crossbeam 1), the hydraulic cylinder 31 retracts, achieving three-point support for the screw through the screw seats 14 at both ends and the slide 2 (with the slider and hydrostatic guide rail 12). This significantly reduces the unsupported span of the screw, reduces screw deformation, increases screw stability, improves transmission efficiency, and enhances workpiece machining accuracy. The overall structure is simple, easy to implement, and highly practical.

[0047] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0048] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0049] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A numerical control gantry boring and milling machining center sliding plate ball screw supporting device, the numerical control gantry boring and milling machining center comprising a beam (1) and a sliding plate (2), the beam (1) being provided with screw rod seats (14) at both ends, the screw rod seats (14) being provided with screw rods rotatably installed between the two screw rod seats (14), and the sliding plate (2) being provided with screw nuts matched with the screw rods, characterized in that, The support device comprises a mounting base (33) connected with the cross beam (1), a hydraulic cylinder (31) connected and mounted on the mounting base (33), a support base (32) slidingly mounted in the mounting base (33) and connected with the extension end of the hydraulic cylinder (31), and the end of the support base (32) away from the hydraulic cylinder (31) can support the middle part of the lead screw.

2. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The mounting base (33) is internally provided with a connecting sleeve (34) capable of slidingly guiding the support base (32).

3. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The end of the mounting base (33) away from the lead screw is connected and mounted with a connecting plate (35), the cylinder body of the hydraulic cylinder (31) is positioned and connected on the connecting plate (35), and the extension shaft of the hydraulic cylinder (31) slidingly penetrates the connecting plate (35).

4. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The end of the support base (32) close to the lead screw is provided with a support pad (36) capable of abutting and supporting the lead screw.

5. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 4, characterized in that, The end of the support base (32) close to the lead screw is provided with a notch capable of engaging with the lead screw, and the bottom of the notch is provided with a horizontal support pad (36).

6. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 5, characterized in that, The side of the notch is further provided with an inclined support pad (36).

7. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 6, characterized in that, The horizontal angle between the inclined support pad (36) and the horizontal plane is 15 degrees, and the inclined support pad (36) can support the lead screw obliquely upward.

8. The CNC longmen boring and milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The mounting base (33) is provided with a limit switch (37) for limiting the extension stroke of the support base (32).

9. The CNC longmen boring-milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The cross beam (1) is provided with a stroke switch (39) for detecting the position of the sliding plate (2).

10. The CNC longmen boring-milling machining center sliding plate ball screw supporting device according to claim 1, characterized in that, The cross beam (1) comprises a beam body (11), the beam body (11) is provided with a static pressure guide rail (12) for slidingly guiding the sliding plate (2), and the sliding plate (2) is provided with a pressing plate (15) capable of pressing and braking the static pressure guide rail (12).

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