Gantry machining center with high stability

Abstract

The invention relates to the technical field of gantry machining centers, and discloses a high-stability gantry machining center which comprises a lathe bed and a workbench, the workbench is installed on a plurality of guide rails arranged above the lathe bed in a translation mode, a plurality of sliding seats used for being connected with the guide rails are connected to the lower portion of the workbench, and each sliding seat comprises a first sliding block, a second sliding block and a crawler-type steel ring. The first sliding block and the second sliding block are fixedly connected, the inner ring of the lower end of the crawler-shaped steel ring is rotationally attached to the bearing end face of the first sliding groove in the first sliding block and the bearing end face of the second sliding groove in the second sliding block, and the outer ring of the lower end of the crawler-shaped steel ring is attached to the bearing end face of the guide rail. According to the invention, through the track-shaped steel ring rotationally connected in the sliding seat, the sliding friction between the sliding block I and the sliding seat block in the prior art is replaced by rolling friction with a smaller friction coefficient, so that the abrasion between the guide rail and the bearing end surface in the sliding seat can be effectively reduced, and the movement precision and stability of a machine tool are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gantry machining centers, in particular to a gantry machining center with strong stability. Background Art

[0002] A gantry machining center refers to a machining center in which the axis of the spindle Z axis is arranged perpendicular to the worktable. Its structure is similar to that of a gantry frame, and it is mainly composed of a bed, columns, crossbeams, a worktable and other parts. In the processing of large workpieces in the fields of aerospace, automobile manufacturing, machinery manufacturing and mold manufacturing, the above-mentioned worktable is generally installed on the bed through a slide and a slide rail, and can be moved forward and backward and left and right along the bed guide rails. The worktable is usually large and can carry large workpieces. As can be seen from the above, large workpieces often need to be carried on the top of the slide, and sufficient support area is required. Generally, ball slides with small contact area cannot be used. Therefore, the slides and slides used in the gantry machining center are generally used to improve the smoothness of the contact end surfaces of the slides and the slides, reduce the friction between the microscopic protrusions, and reduce the friction force, that is, the load-bearing end surface of the guide groove in the slide and the upper surface of the slide fit each other.

[0003] Although lubricants can be used to form a good oil film on the contact surface between the slide rail and the slide seat to reduce the friction coefficient, there is still a lot of friction between the slide rail and the slide seat when they are under heavy load. After the slide seat and the guide rail are used for a long time, the contact end surfaces between the slide rail and the slide seat will also wear, causing vibration when the machine tool moves and reducing the processing accuracy. In view of this, this paper proposes a gantry machining center with long-life slide rails, slide seats and strong stability. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a gantry machining center with strong stability, which has the advantages of stable machine operation, high machining accuracy, long life of slide rails and slide seats, etc., and solves the problem that the slide rails and slide seats are easy to wear and have a short life.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gantry machining center with strong stability, comprising a bed and a workbench, wherein the workbench is installed translationally on a plurality of guide rails arranged above the bed, and a plurality of slide seats for connecting the plurality of guide rails are connected below the workbench;

[0008] The slide seat includes a slider 1, a slider 2 and a track-shaped steel ring. The slider 1 and the slider 2 are fixedly connected. The inner ring of the lower end of the track-shaped steel ring rotates and fits on the load-bearing end surfaces of the slide groove 1 in the slider 1 and the slide groove 2 in the slider 2. The outer ring of the lower end of the track-shaped steel ring fits on the load-bearing end surface of the guide rail.

[0009] Preferably, the track-shaped steel ring includes a plurality of chain plates and a plurality of chain pins, and the plurality of chain plates are hingedly connected via a plurality of chain pins to form a ring-shaped structure, and the two ends of the inner ring of the track-shaped steel ring are rotatably installed on both sides of slider one and slider two through two rollers.

[0010] Preferably, two teeth are fixedly mounted on the inner end surface of each chain plate, and at the same time, a plurality of evenly distributed tooth grooves are coaxially provided on the periphery of both ends of the rotating roller.

[0011] Preferably, both ends of the rotating roller on the left side are rotatably installed in two rotating holes 1 on the left side of the slider 1, and both ends of the rotating roller on the right side are rotatably installed in two rotating holes 2 on the right side of the slider 2.

[0012] Preferably, the right side of the slider one is telescopically mounted on the left side of the slider two through a plurality of guide blocks, and a screw is rotatably mounted on the right side of the slider one, and the right end of the screw is threadedly connected to the threaded hole in the slider two.

[0013] Preferably, a butter cavity is provided in the slider one, a grease nozzle is provided on one side of the butter cavity, the grease nozzle is fixedly installed on the outer side of the slider one, and a strip slit is provided below the butter cavity.

[0014] Preferably, the guide rail includes a support bar and a plurality of guide frames, the lower parts of the plurality of guide frames are linearly arranged and embedded in the support bar, and the support bar is fixedly connected to the bed.

[0015] Preferably, strip grooves are symmetrically arranged on both sides of the guide frame, a plurality of bolt grooves are equidistantly arranged on the upper surface of the guide frame, a plurality of through holes are arranged on the support bar, and the plurality of through holes are respectively connected to the bolt grooves in the guide frames.

[0016] Preferably, the slider 1 and the slider 2 are provided with a plurality of heat dissipation holes 1 and heat dissipation holes 2 which are interconnected.

[0017] Preferably, the heat dissipation hole 1 and the heat dissipation hole 2 are parallel to the guide rail.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a gantry machining center with strong stability, which has the following beneficial effects:

[0020] 1. The present invention replaces the sliding friction between the slider and the slide block in the prior art with rolling friction with a smaller friction coefficient through a crawler-shaped steel ring rotatably connected in the slide, which can effectively reduce the wear between the guide rail and the bearing end surface in the slide, and improve the accuracy and stability of the machine tool movement.

[0021] 2. In the present invention, the butter grease filled in the butter cavity of the slider can gradually pass through the strip-shaped seam by its own weight and be smeared on the inner ring of the track-shaped steel ring, and as the track-shaped steel ring rotates, the entire inner ring of the track-shaped steel ring is completely smeared, and as the butter grease on the inner ring of the track-shaped steel ring accumulates, the butter grease will also be smeared on the upper surface of the guide frame on the guide rail through the gap between the multiple chain plates. The butter grease can form a good oil film on the contact surface between the guide rail and the slide seat, reduce the friction coefficient, and can also effectively reduce the wear between the guide rail and the bearing end faces in the slide seat, thereby improving the accuracy and stability of the machine tool movement.

[0022] 3. The present invention can assist the slide to dissipate heat quickly through a plurality of mutually interpenetrating heat dissipation holes 1 and heat dissipation holes 2 in the slide. When the slide moves back and forth along the guide rail, a plurality of mutually interpenetrating heat dissipation holes 1 and heat dissipation holes 2 will flow in countercurrent with the air to dissipate heat to the slide in time, thereby preventing the slide and the butter grease therein from being too high in temperature. Similarly, when the cooling fan is powered on, the air outlet of the cooling fan can face the slide to accelerate the heat dissipation of the slide. Excessive temperature can affect the performance of the butter grease and the mechanical properties of the material, thereby helping to reduce friction. It can also reduce the wear between the guide rail and the bearing end faces in the slide, thereby improving the accuracy and stability of the machine tool movement.

[0023] 4. The present invention uses a guide rail formed by assembling a support bar and a plurality of guide frames, which facilitates the replacement of the guide frame of the worn section. Simply put, if the bearing end face of the guide frame engaged with the support bar is worn, the worn guide frame can be directly disassembled and replaced separately. Compared with disassembling and replacing the entire guide rail in the prior art, this is faster and more convenient.

[0024] 5. The present invention uses a laser ranging sensor to regularly scan the surfaces of several guide frames of the guide rail and compare the measurement data at different time points. It can detect the height change and unevenness of the guide frame surface, determine whether the upper surface of the guide frame is worn and the position, and facilitate timely replacement of the guide frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a gantry machining center with strong stability proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the connection between the guide rail and the slide seat in a gantry machining center with strong stability proposed by the present invention;

[0027] Figure 3 An exploded diagram of a slide in a gantry machining center with strong stability proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the chain plate structure in a gantry machining center with strong stability proposed by the present invention;

[0029] Figure 5 This is a front view of a slide seat in a gantry machining center with strong stability proposed by the present invention;

[0030] Figure 6 A side cutaway view of a slide in a gantry machining center with high stability proposed by the present invention;

[0031] Figure 7 This is a schematic diagram of the connection between the guide rail and the slide seat in a gantry machining center with high stability proposed in Example 2 of the present invention.

[0032] In the figure: 1. bed; 2. workbench; 3. guide rail; 31. support bar; 32. guide frame; 33. perforation; 34. bolt groove; 35. strip groove; 4. slide seat; 41. slider 1; 411. grease nozzle; 412. rotating hole 1; 413. slide groove 1; 414. guide block; 415. heat dissipation hole 1; 416. butter cavity; 417. strip seam; 42. screw; 43. track-shaped steel ring; 431. chain plate; 432. chain pin; 433. missing groove; 434. tooth; 44. slider 2; 441. threaded hole; 442. rotating hole 2; 443. heat dissipation hole 2; 444. slide groove 2; 45. roller; 451. cylinder; 452. tooth groove; 5. laser ranging sensor; 51. fixed frame 1; 6. cooling fan; 61. fixed frame 2. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] Refer to the attached Figure 1-6A gantry machining center with strong stability comprises a bed 1, on which four mutually parallel guide rails 3 are fixedly installed in parallel, the guide rails 3 comprise a support bar 31 and a plurality of guide frames 32, the lower parts of the plurality of guide frames 32 are linearly arranged and embedded in the support bar 31, the support bar 31 is fixedly connected to the bed 1, strip grooves 35 are symmetrically arranged on both sides of the guide frame 32, a plurality of bolt grooves 34 are equidistantly arranged on the upper surface of the guide frame 32, a plurality of through holes 33 are arranged on the support bar 31, and the plurality of through holes 33 are respectively connected to the bolt grooves 34 in the plurality of guide frames 32;

[0036] The above-mentioned support bar 31 is used to assist in the splicing and installation of several guide frames 32, and secondly, to support the guide frame 32 for load-bearing. The two are combined with each other to facilitate the replacement of the guide frame 32 of the worn section. The bolt groove 34 is mainly used to hide the inserted bolt. The head end of the bolt cannot pass downward through the bolt groove 34. The lower end of the bolt passes downward through the corresponding through hole 33 in the guide rail 3 and can be tightened in the connecting hole on the bed 1.

[0037] In this embodiment, a slide seat 4 is slidably installed on each guide rail 3, and the slide seat 4 includes a slider 1 41, a slider 2 44 and a track-shaped steel ring 43. The total length of the slider 1 41 and the slider 2 44 is adjustable and fixedly connected. A plurality of guide blocks 414 are fixedly installed on the right side of the slider 1 41. The right end of the guide block 414 is telescopically installed on the left side of the slider 2 44, and a screw rod 42 is rotatably installed on the right side of the slider 1 41. The right end of the screw rod 42 is threadedly connected to the threaded hole 441 in the slider 2 44, and the right end of the screw rod 42 is arranged on the right side of the slider 2 44 to form a regular hexagonal column. The screw rod 42 can be screwed with an appropriate wrench to adjust the spacing and total length between the sliders 1 41 and the sliders 2 44, so as to facilitate the installation of the track-shaped steel ring 43 on the slide seat 4.

[0038] In this embodiment, the crawler-shaped steel ring 43 includes a plurality of chain plates 431 and a plurality of chain pins 432, and the plurality of chain plates 431 are hingedly connected via the plurality of chain pins 432 to form a ring-shaped structure, and the middle part of one side of the chain plate 431 protrudes outward, and the other side is provided with a notch 433 that interlocks with the above-mentioned protrusion, so as to reduce the hinge gap between the two chain plates 431, and the two ends of the inner ring of the crawler-shaped steel ring 43 are respectively rotatably installed on both sides of the slider 1 41 and the slider 2 44 through two rollers 45, and the inner ring of the lower end of the crawler-shaped steel ring 43 is rotatably fitted in the slide groove 1 413 in the slider 1 41 and the slider 2 On the bearing end surface of the second slide groove 444 in 44, the lower end outer ring of the crawler-shaped steel ring 43 is fitted on the bearing end surface of the guide rail 3, that is, the several chain plates 431 in the crawler-shaped steel ring 43 need to be finely processed, and the thickness is basically kept the same, which is used to evenly distribute the weight of the slide 4 through the several chain plates 431 below the crawler-shaped steel ring 43, and polish the upper and lower surfaces of the chain plates 431. The smooth surface can reduce the friction between the micro-protrusions and reduce the friction force. The bearing area of ​​the crawler-shaped steel ring 43 is basically the same as the bearing end surface area of ​​the slide groove in the original slide, and the bearing capacity is basically the same as the original slide;

[0039] Two teeth 434 are fixedly installed on the inner end surface of each chain plate 431. At the same time, a number of uniformly distributed tooth grooves 452 are coaxially provided on the periphery of both ends of the roller 45. The two ends of the left roller 45 are rotatably installed in the two rotating holes 412 on the left side of the slider 1 41 through two cylinders 451, and the two ends of the right roller 45 are rotatably installed in the two rotating holes 442 on the right side of the slider 2 44 through two cylinders 451. It is mainly used to mesh and connect the two rollers 45 with the two ends of the inner ring of the crawler-shaped steel ring 43, and replace the sliding friction between the slider 1 41 and the sliding seat block in the prior art with rolling friction with a smaller friction coefficient, which can improve the accuracy and stability of the movement.

[0040] The grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417, and the grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417. The grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417. The grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417. The grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417. The grease in the grease chamber 416 is applied to the inner ring of the track-shaped steel ring 43 through the strip slit 417.

[0041] In this embodiment, a plurality of mutually interpenetrating heat dissipation holes 1 415 and a plurality of heat dissipation holes 2 443 are provided on the slider 1 41 and the slider 2 44. The heat dissipation holes 1 415 and the heat dissipation holes 2 443 are parallel to the guide rail 3. That is, when the slide 4 reciprocates along the guide rail 3, the plurality of mutually interpenetrating heat dissipation holes 1 415 and the heat dissipation holes 2 443 in the slide 4, the plurality of heat dissipation holes 1 415 and the plurality of heat dissipation holes 2 443 will flow countercurrently with the air, so as to dissipate the heat of the slide 4 in time and avoid the slide 4 and the butter grease therein from being too high in temperature. The excessively high temperature will affect the performance of the butter grease and the mechanical properties of the material and help reduce friction.

[0042] In this embodiment, the slide block 1 41 and the slide block 2 44 in all the slide seats 4 are fixedly connected with the workbench 2 so as to install the workbench 2 on the bed 1 in a translational manner.

[0043] The present invention:

[0044] 1) By using the track-shaped steel ring 43 that is rotatably connected in the slide 4, the sliding friction between the slider 1 41 and the slide block in the prior art is replaced with rolling friction with a smaller friction coefficient, which can effectively reduce the wear between the guide rail 3 and the bearing end surface in the slide 4, and improve the accuracy and stability of the machine tool movement;

[0045] 2) The butter grease filled in the butter cavity 416 in the slider 41 can be gradually spread through the strip slit 417 by its own weight and smeared on the inner ring of the crawler-shaped steel ring 43. As the crawler-shaped steel ring 43 rotates, the entire inner ring of the crawler-shaped steel ring 43 is completely smeared. Moreover, as the butter grease on the inner ring of the crawler-shaped steel ring 43 accumulates, the butter grease will also be spread on the upper surface of the guide frame 32 on the guide rail 3 through the gaps between the multiple chain plates 431. The butter grease can form a good oil film on the contact surface between the guide rail 3 and the slide seat 4, reduce the friction coefficient, and can also effectively reduce the wear between the bearing end faces of the guide rail 3 and the slide seat 4, thereby improving the accuracy and stability of the machine tool movement.

[0046] 3) Through the plurality of mutually interpenetrating heat dissipation holes 1 415 and heat dissipation holes 2 443 in the slide 4, the slide 4 can be assisted to dissipate heat quickly. When the slide 4 moves back and forth along the guide rail 3, the plurality of mutually interpenetrating heat dissipation holes 1 415 and heat dissipation holes 2 443 will flow countercurrently with the air, dissipating the heat of the slide 4 in time, avoiding the slide 4 and the butter grease therein from being too high in temperature. Excessive temperature will affect the performance of the butter grease and the mechanical properties of the material, and help reduce friction. It can also reduce the wear between the guide rail 3 and the bearing end surface of the slide 4, and improve the accuracy and stability of the machine tool movement;

[0047] 4) The guide rail 3 formed by assembling a support bar 31 and a plurality of guide frames 32 is convenient for replacing the guide frame 32 of the worn section. Simply put, if the bearing end face of the guide frame 32 engaged with the support bar 31 is worn, the worn guide frame 32 can be directly disassembled and replaced separately. Compared with disassembling and replacing the entire guide rail 3 in the prior art, it is faster and more convenient.

[0048] Embodiment 2: The difference from Embodiment 1 is that: a wear detection device and a heat dissipation device are respectively installed on both sides of the slide seat 4;

[0049] Refer to the attached Figure 7 The wear detection device specifically adopts a laser distance sensor 5. The shell of the laser distance sensor 5 is fixedly installed on the left side of the slider 41 through a fixing frame 51, and the emitting light head of the laser distance sensor 5 is vertically arranged on one side above the guide frame 32 with the light head facing downward, staggered with the bolt slot 34. The laser distance sensor 5 can accurately measure the distance from the upper surface of the guide frame 32 in the guide rail 3 to the sensor. By regularly scanning the surface of the guide frame 32 and comparing the measurement data at different time points, the height change and unevenness of the surface of the guide frame 32 can be found, so as to judge whether the upper surface of the guide frame 32 is worn and the position, so as to facilitate timely replacement;

[0050] The heat dissipation device specifically adopts a heat dissipation fan 6. The upper end of the shell of the heat dissipation fan 6 is fixedly installed on the right side of the slider 44 through a fixing frame 61. The heat dissipation fan 6 is connected to a power supply through a wire, and the air outlet of the heat dissipation fan 6 is facing the slide 4 to accelerate the heat dissipation of the slide 4. It is mainly used when the workbench 2 runs at a high speed and generates high temperature. The slide 4 cannot dissipate heat in time. The heat dissipation fan 6 is used to draw air to blow on the slide 4 to accelerate the air flow and take away the heat.

[0051] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gantry machining center with high stability, comprising a bed (1) and a workbench (2), wherein the workbench (2) is installed translationally on a plurality of guide rails (3) arranged above the bed (1), characterized in that: A plurality of slide seats (4) for connecting a plurality of guide rails (3) are connected below the workbench (2); The slide seat (4) comprises a slider 1 (41), a slider 2 (44) and a track-shaped steel ring (43); the slider 1 (41) and the slider 2 (44) are fixedly connected; the inner ring at the lower end of the track-shaped steel ring (43) is rotatably fitted on the bearing end surfaces of the slide groove 1 (413) in the slider 1 (41) and the slide groove 2 (444) in the slider 2 (44); and the outer ring at the lower end of the track-shaped steel ring (43) is fitted on the bearing end surface of the guide rail (3).

2. A gantry machining center with strong stability according to claim 1, characterized in that: The crawler-shaped steel ring (43) comprises a plurality of chain plates (431) and a plurality of chain pins (432). The plurality of chain plates (431) are hingedly connected via the plurality of chain pins (432) to form a ring-shaped structure. The two ends of the inner ring of the crawler-shaped steel ring (43) are rotatably mounted on the two sides of the slider 1 (41) and the slider 2 (44) via two rollers (45).

3. A gantry machining center with strong stability according to claim 2, characterized in that: Two teeth (434) are fixedly mounted on the inner end surface of each chain plate (431), and at the same time, a plurality of tooth grooves (452) that are evenly distributed are coaxially arranged on the periphery of both ends of the rotating roller (45).

4. A gantry machining center with high stability according to claim 2, characterized in that: The two ends of the rotating roller (45) on the left side are rotatably mounted in two rotating holes (412) on the left side of the slider (41), and the two ends of the rotating roller (45) on the right side are rotatably mounted in two rotating holes (442) on the right side of the slider (44).

5. A gantry machining center with strong stability according to claim 1, characterized in that: The right side of the slider (41) is telescopically mounted on the left side of the slider (44) via a plurality of guide blocks (414), and a screw rod (42) is rotatably mounted on the right side of the slider (41), the right end of the screw rod (42) being threadedly connected to a threaded hole (441) in the slider (44).

6. A gantry machining center with high stability according to claim 1, characterized in that: A grease chamber (416) is provided in the slider one (41), one side of the grease chamber (416) is connected to an oiling nozzle (411), the oiling nozzle (411) is fixedly mounted on the outside of the slider one (41), and a strip-shaped slit (417) is provided below the grease chamber (416).

7. A gantry machining center with high stability according to claim 1, characterized in that: The guide rail (3) comprises a support bar (31) and a plurality of guide frames (32); the lower parts of the plurality of guide frames (32) are linearly arranged and embedded on the support bar (31); and the support bar (31) is fixedly connected to the bed (1).

8. A gantry machining center with high stability according to claim 7, characterized in that: The guide frame (32) is symmetrically provided with strip grooves (35) on both sides, the upper surface of the guide frame (32) is equidistantly provided with a plurality of bolt grooves (34), the support bar (31) is provided with a plurality of through holes (33), and the plurality of through holes (33) are respectively connected to the bolt grooves (34) in the guide frame (32).

9. A gantry machining center with high stability according to claim 1, characterized in that: The slider 1 (41) and the slider 2 (44) are provided with a plurality of heat dissipation holes 1 (415) and heat dissipation holes 2 (443) which are interconnected.

10. A gantry machining center with high stability according to claim 9, characterized in that: The heat dissipation hole 1 (415) and the heat dissipation hole 2 (443) are parallel to the guide rail (3).

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