A stable supporting device for a laser pipe cutting machine

Abstract

The utility model discloses a kind of stable supporting devices for laser pipe cutting machine, it is related to laser processing equipment technical field, to solve the thermal stress conflict of marble bed body and steel bottom support due to different thermal expansion coefficients, and the high dynamic vibration problem when bearing double moving chuck.The utility model includes steel bottom support and marble bed body;Between bed body and bottom support bottom, there is the support assembly containing low-friction slide, and clearance is reserved between bed body side surface and the limiting block fixed on bottom support.The structure utilizes the high damping of marble to absorb vibration, at the same time, the combination of low-friction slide and clearance, while allowing steel bottom support thermal expansion and contraction, releasing thermal stress, can also rigidly resist the inertial drift of chuck high-speed movement, ensure the long-term high accuracy of complete machine.

Description

Technical Field

[0001] This invention relates to the field of laser processing equipment technology, and in particular to a high-rigidity, thermally stable support device for a laser tube cutting machine. Background Technology

[0002] Laser tube cutting machines, especially those with dual moving chucks (i.e., both the front and rear chucks can move independently on the bed guideways), involve high-speed, asynchronous reciprocating motion of the two heavy-duty chucks during processing. This high dynamic load generates significant vibration and inertial impact on the machine bed, leading to a decrease in cutting accuracy.

[0003] To address the vibration problem, one possible improvement is to replace the conventional steel bed with a material that has high rigidity and high damping properties (such as marble or granite). However, marble beds are expensive, so to save costs, those skilled in the art usually mount them on a steel base, forming a "marble-steel" composite base.

[0004] At this point, a completely new technical problem arose: marble has an extremely low coefficient of thermal expansion, while steel has a relatively high coefficient. These two dissimilar materials are rigidly connected together. When the ambient temperature in the workshop changes or the machine itself heats up, the steel base will experience thermal deformation far greater than that of the marble bed. This enormous thermal stress will be transmitted in the opposite direction, causing the high-precision marble bed to bend or warp, resulting in a loss of precision.

[0005] Meanwhile, the dual-moving chuck layout disclosed in patent application CN202510429780.X requires the bed to be firmly fixed to withstand inertial impact forces, which directly conflicts with the floating connection required to release thermal stress.

[0006] Currently, there is no solution that can simultaneously resolve the complex technical challenge of the conflict between the high dynamic vibration of the dual-moving chuck and the thermal stress of the steel-stone heterogeneous base. Therefore, this application provides a stable support device for laser tube cutting machines to meet the requirements. Utility Model Content

[0007] The purpose of this application is to provide a stable support device for a laser tube cutting machine, which aims to solve the two major technical problems mentioned in the background art: high dynamic vibration and thermal stress conflict when a composite base supports two moving chucks.

[0008] To achieve the above objectives, this application provides the following technical solution: a stable support device for a laser tube cutting machine, comprising: Steel base; A marble bed frame is mounted on a steel base, and the marble bed frame is provided with guide rails for supporting a movable chuck. At least one support component is disposed between the steel base and the bottom of the marble bed frame; At least one limiting component is used to limit the horizontal position of the marble bed frame on the steel base; The support assembly includes a low-friction slider, which allows for horizontal micron-level relative sliding between the marble bed frame and the steel base when thermal deformation occurs, in order to release thermal stress. The limiting component includes a limiting block fixed on the steel base. A gap is reserved between the limiting surface of the limiting block and the side wall of the marble bed. The gap is used to release thermal stress while preventing the marble bed from undergoing macroscopic horizontal displacement due to inertial force.

[0009] Preferably, the support assembly further includes a leveling bolt screwed onto the steel base and an elastic damping washer disposed between the leveling bolt and the low-friction slide; the bottom of the marble bed rests on the low-friction slide.

[0010] Preferably, at least three limiting blocks are provided, distributed on at least two side walls of the marble bed frame, to limit the marble bed frame at three points.

[0011] Preferably, the device is used to support a laser tube cutting machine, which includes a front chuck that can move along the guide rail and a hollow rear chuck that can move independently along the guide rail; the high weight and high damping characteristics of the marble bed are used to absorb the resonance generated when the front and rear chucks move at high speed asynchronously.

[0012] Preferably, the hollow rear chuck is used to move to a position close to the front chuck when cutting long pipes, to provide follow-up material support for the pipes and prevent the pipes from sinking.

[0013] Preferably, the laser tube cutting machine further includes a tail material extraction device disposed at the front end of the marble bed. The tail material extraction device includes a clamping cylinder for extracting the tail material from the front chuck after cutting is completed.

[0014] Preferably, both the front chuck and the rear chuck are provided with a translation motor for driving them to move along the guide rail, and a rotary motor for driving the pipe they hold to rotate.

[0015] In summary, the technical effects and advantages of this utility model are as follows: In this invention, a marble bed is used, whose high weight and high damping characteristics are far superior to those of steel. It can effectively absorb and suppress the huge vibrations and resonances generated by the dual moving chucks during high-speed, asynchronous start-stop, thus ensuring the stability of the cutting head.

[0016] In this invention, the ingenious combination of support and limiting components resolves the technical conflict between thermal stress and drift prevention in heterogeneous bases under high dynamic loads. The low-friction sliding plate allows the steel base to slide freely and slightly during thermal expansion and contraction, releasing thermal stress; while the limiting block and its gap rigidly prevent drift during machine operation.

[0017] In this invention, the thermal deformation of the steel base is ensured to be prevented from being transmitted to the marble bed, thus preventing the marble bed from warping and ensuring the long-term straightness of the guide rail and the high precision of the whole machine.

[0018] In this invention, the hollow rear chuck acts as a follow-up material support, solving the problem of long pipes sinking; and in conjunction with the tail material extraction device, it achieves true zero tail material cutting. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a top view of the present invention; Figure 4 This is an enlarged schematic diagram of the structure at point A of this utility model; Figure 5 This is a schematic diagram of the structure of the rear chuck of this utility model; Figure 6 This is a schematic diagram of the support component of this utility model.

[0021] In the diagram: 10. Steel base; 20. Marble bed; 30. Guide rail; 40. Steel gantry; 41. Cutting device; 50. Front chuck; 60. Rear chuck; 62. Rotary motor; 63. Translation motor; 70. Tail material extraction device; 71. Clamping cylinder; 90. Support assembly; 91. Leveling bolt; 92. Elastic damping pad; 93. Low-friction slide plate; 100. Limiting assembly; 101. Limiting block; 102. Gap. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] refer to Figure 1-6 The illustrated stable support device for a laser tube cutting machine includes a steel base 10 and a marble bed 20. The marble bed 20 is mounted on the steel base 10, and its high weight and high damping characteristics form the technical basis of this solution.

[0024] The marble bed 20 is also equipped with a steel gantry 40 for supporting the cutting device 41, and a guide rail 30 is provided on the upper surface of the marble bed 20. The front chuck 50 and the hollow rear chuck 60 are both mounted on the guide rail 30 and can move independently along the guide rail 30.

[0025] The front chuck 50 has a similar structure to the rear chuck 60. Both the front chuck 50 and the rear chuck 60 are equipped with a translation motor 63 for driving them to translate along the guide rail 30, and a rotary motor 62 for driving the tubes they hold to rotate. This "dual-moving chuck" layout (similar to that disclosed in CN202510429780.X) will generate huge vibrations and inertial forces on the bed during high-speed operation. At the same time, the heterogeneous material combination of the marble bed 20 and the steel base 10 will generate severe thermal stress conflicts.

[0026] To solve this complex problem, the present invention provides the following key structure: In one embodiment of this invention, a plurality of support components 90 are provided between the bottom of the marble bed frame 20 and the top of the steel base 10. Each support component 90 includes a leveling bolt 91, the threaded end of which is screwed into a threaded hole in the steel base 10, with its flat top end providing support. Elastic damping washers 92 and low-friction sliding plates 93, made of materials such as PTFE, are stacked sequentially on the top of the leveling bolt 91. The bottom of the marble bed frame 20 rests solely on the low-friction sliding plates 93 and is not rigidly locked to the steel base 10 by any bolts.

[0027] This structure allows the marble bed 20 to slide horizontally at the micron level on the low-friction sliding plate 93 when it expands and contracts with heat, thereby completely releasing the thermal stress transmitted from the steel base 10 and preventing the marble bed 20 from being stretched or bent.

[0028] As one embodiment of this invention, to prevent the floating marble bed 20 from drifting under the enormous inertial force of the front chuck 50 and rear chuck 60 during high-speed start-stop, this invention also includes a limiting component 100. The limiting component 100 includes a plurality of limiting blocks 101, which are rigidly fixed to the upper surface of the steel base 10 and located next to the side wall of the marble bed 20.

[0029] The key is that a gap 102 (e.g., 0.05-0.1 mm) is reserved between the limiting surface of the limiting block 101 and the side wall of the marble bed 20. This gap 102 is large enough to release thermal stress because the magnitude of thermal deformation is within this range, yet small enough to immediately prevent macroscopic displacement of the marble bed 20 when the machine is subjected to huge inertial forces. This structure ingeniously solves the technical conflict between releasing thermal stress and resisting inertial forces.

[0030] As one implementation method in this embodiment, when cutting long pipes, the hollow rear chuck 60 can be driven by its translation motor 63 to move to a position very close to the front chuck 50, acting as a high-precision follow-up material support, which solves the problem of pipe sagging (forming an arch shape) caused by the excessive distance between the front and rear chucks in conventional pipe cutting machines.

[0031] As one embodiment of this invention, a tail material extraction device 70 is also provided at the front end of the bed, which includes a clamping cylinder 71. After all cutting is completed, this device is used to extract the last piece of waste material held in the front chuck 50 from the front chuck 50, achieving true zero tail material.

[0032] The working principle of this utility model is as follows: During operation, the front chuck 50 and the hollow rear chuck 60 work together through their respective translation motors 63 and rotation motors 62 to achieve relay feeding and high-precision follow-up material support of the pipe.

[0033] During this process, the high weight of the marble bed frame 20 absorbs the resonance of the high-speed movement of the double chucks.

[0034] When the workshop temperature changes, the steel base 10 expands and contracts due to heat. The gap 102 in the low-friction sliding plate 93 in the support assembly 90 and the limit assembly 100 allows the steel base 10 to deform freely without transferring stress to the marble bed 20, thus ensuring the accuracy of the guide rail 30.

[0035] The electromechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments; they are common knowledge.

[0036] Components not described in detail in this article are existing technologies.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stabilizing support device for a laser tube cutting machine, characterized in that, include: Steel base (10); A marble bed frame (20) is mounted on the steel base (10) and a guide rail (30) for supporting a movable chuck is provided on the marble bed frame (20). At least one support component (90) is disposed between the bottom of the steel base (10) and the bottom of the marble bed frame (20); At least one limiting component (100) is used to define the horizontal position of the marble bed (20) on the steel base (10); The support assembly (90) includes a low-friction slider (93), which is used to allow a horizontal micron-level relative sliding between the marble bed (20) and the steel base (10) when thermal deformation occurs, so as to release thermal stress. The limiting component (100) includes a limiting block (101) fixed on the steel base (10). A gap (102) is reserved between the limiting surface of the limiting block (101) and the side wall of the marble bed (20). The gap (102) is used to prevent the marble bed (20) from undergoing macroscopic horizontal displacement due to inertial force while releasing thermal stress.

2. The stable support device for a laser tube cutting machine according to claim 1, characterized in that: The support assembly (90) also includes a leveling bolt (91) screwed onto the steel base (10) and an elastic damping pad (92) disposed between the leveling bolt (91) and the low-friction slide (93); the bottom of the marble bed (20) rests on the low-friction slide (93).

3. The stable support device for a laser tube cutting machine according to claim 1, characterized in that: At least three limiting blocks (101) are provided, distributed on at least two side walls of the marble bed frame (20), to limit the marble bed frame (20) at three points.

4. The stabilizing support device for a laser tube cutting machine according to claim 1, characterized in that: The device is used to support a laser tube cutting machine, which includes a front chuck (50) that can move along the guide rail (30) and a hollow rear chuck (60) that can move independently along the guide rail (30); the high weight and high damping characteristics of the marble bed (20) are used to absorb the resonance generated when the front chuck (50) and the rear chuck (60) move at high speed asynchronously.

5. A stable support device for a laser tube cutting machine according to claim 4, characterized in that: The hollow rear chuck (60) is used to move to a position close to the front chuck (50) when cutting long pipes, to provide follow-up material support for the pipes and prevent the pipes from sinking.

6. A stable support device for a laser tube cutting machine according to claim 4, characterized in that: The laser tube cutting machine also includes a tail material extraction device (70) located at the front end of the marble bed (20). The tail material extraction device (70) includes a clamping cylinder (71) for extracting the tail material from the front chuck (50) after cutting.

7. A stable support device for a laser tube cutting machine according to claim 4, characterized in that: Both the front chuck (50) and the rear chuck (60) are provided with a translation motor (63) for driving them to translate along the guide rail (30) and a rotary motor (62) for driving the pipes they hold to rotate.

Images