Blanking clamping mechanism of laser cutting machine tool
By combining the elastic mechanism and the self-locking mechanism, the problem of improper force when the laser cutting machine tool clamps the round tube is solved, and a stable and damage-free clamping effect is achieved.
Patent Information
- Application Number
- CN202511962390.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-01-23
AI Technical Summary
Existing laser cutting machine tools have difficulty balancing the clamping force when clamping round tubes. Too much force can easily damage the profile, while too little force can lead to instability, especially for thin-walled tubes.
It adopts an elastic mechanism and a stroke self-locking mechanism. The elastic component provides elastic clamping force, and the self-locking mechanism ensures clamping stability and uniformity, avoiding direct pressure damage to the profile.
It achieves stable clamping of circular tubes, avoids damage to the profiles, and ensures stability and straightness during the cutting process.
Smart Images
Figure CN121373879A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of laser cutting, in particular to a laser cutting machine tool blanking clamping mechanism. BACKGROUND
[0002] The laser cutting machine tool is a commonly used equipment in machining, and is mainly used for blanking and cutting of plate and long profile; When cutting a circular pipe, due to the characteristics of the circular pipe, the clamping mechanism of the laser cutting is mostly point (line) contact clamping, which puts forward higher requirements for the control of the contact force (pressure); Especially for the pipe with thin wall, the excessive pressure is easy to damage the profile, and the small pressure is difficult to ensure the stability of the profile during cutting. SUMMARY
[0003] In view of the above technical deficiencies, the present application provides a laser cutting machine tool blanking clamping mechanism; the present application avoids the damage of the profile by the elastic mechanism, and locks the clamping mechanism by the stroke self-locking mechanism, so as to avoid the stability problem caused by the passive extension and contraction of the spring.
[0004] The present application adopts the following technical scheme: a laser cutting machine tool blanking clamping mechanism, comprising: A base plate is provided with a through hole for the pipe to pass through; Two symmetrical upper and lower clamping assemblies are arranged on both sides of the through hole and are slidingly installed on the base plate in the same direction; A driving assembly is used to drive the upper and lower clamping assemblies to move synchronously close to or away from each other; The lower clamping assembly comprises: Symmetrical left and right rotary seats are slidingly installed on both sides of the base plate, respectively; A rotating shaft is rotatably installed on the left and right rotary seats at both ends, respectively; Symmetrical left and right sliding sleeves are slidingly sleeved on the left and right ends of the rotating shaft; the close ends of the left and right sliding sleeves are used to support the pipe; A left spring is used to push the left sliding sleeve to the right; A right spring is used to push the right sliding sleeve to the left; Wherein, the circumferential surface of the left and right ends of the rotating shaft is provided with a helical groove symmetrical along the median line of the rotating shaft, and the inner wall of the left and right sliding sleeves has an inner key matched with the helical groove of the left and right ends.
[0005] Further, the left sliding sleeve is rotatably installed with a roller at one end close to the right sliding sleeve; the roller is flush with one side surface of the left sliding sleeve close to the through hole, and the roller is parallel to the axis of the pipe.
[0006] The middle of the rotating shaft is provided with an annular groove for avoiding the pipe.
[0007] The left sliding sleeve is internally fixed with a wear-resistant sleeve, and the inner wall of the wear-resistant sleeve is fixed with the inner key.
[0008] The left spring sleeve is installed on the rotating shaft between the left rotating seat and the left sliding sleeve, and the opposite surfaces of the left rotating seat and the left sliding sleeve are provided with sunken grooves matched with the end portions of the left spring.
[0009] An axial guide mechanism is arranged between the left rotating seat and the left sliding sleeve and between the right sliding sleeve and the right spring respectively, for limiting the rotation of the left sliding sleeve and the right sliding sleeve around the rotating shaft.
[0010] The axial guide mechanism between the left rotating seat and the left sliding sleeve comprises a guide plate, which is fixed on the side of the left sliding sleeve close to the upper clamping assembly, extends towards the left rotating seat and is attached to the left rotating seat. The guide plate and the left rotating seat are slidably matched through dovetail grooves.
[0011] A limiting block is fixed on the side of the guide plate close to the upper clamping assembly.
[0012] Four rectangularly distributed through grooves are formed on the two sides of the base plate, and the left and right rotating seats in the upper and lower clamping assemblies are slidably installed in the corresponding through grooves; the driving assembly is fixed on the side of the base plate away from the upper and lower clamping assemblies, and the output end of the driving assembly is fixedly connected with the left and right rotating seats.
[0013] The driving assembly comprises: Left and right bidirectional lead screws are rotatably installed on the base plate, the two ends of the left bidirectional lead screw are threadedly connected with the left rotating seat in the upper and lower clamping assemblies respectively, and the two ends of the right bidirectional lead screw are threadedly connected with the right rotating seat in the upper and lower clamping assemblies respectively; A transmission shaft is rotatably installed on the base plate, and the two ends of the transmission shaft are connected with the end portions of the left and right bidirectional lead screws through bevel gear sets respectively; A servo motor is fixed on the base plate, and the output end of the servo motor is connected with the transmission shaft through a straight gear set.
[0014] The present application has the following beneficial effects: During clamping, the elastic mechanism formed by the left spring, the right spring and the related components provides elastic force, so that the pressure provided by the driving assembly is not directly applied to the pipe; through the compression deformation of the spring, the excess pressure is absorbed, and suitable clamping points are provided for the four supporting rollers, so that the damage of the profile caused by the excessive clamping force of point (line) contact is avoided, and the present application is especially suitable for the positioning and clamping of circular pipes. The upper and lower side limit blocks are matched to form a self-locking mechanism after the clamping stroke is completed; the upper and lower limit blocks are in contact and pressed, a certain friction force is provided, the left sliding sleeve and the right sliding sleeve cannot move to both sides, the positions of the four supporting rollers are fixed, the problem of unstable pipe fitting clamping caused by the added elastic mechanism is solved, and the stability of the profile during cutting is ensured; The left sliding sleeve and the right sliding sleeve in the upper and lower clamping assemblies are synchronously moved through the cooperation of the spiral groove and the inner key, so that the centers of the four rectangularly distributed supporting rollers are unchanged and always coincide with the pipe fitting axis, the clamping force deviation which damages the straightness of the pipe fitting is avoided, and the uniformity of the clamping force is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0016] Figure 1 It is a perspective view of the present application, a pipe fitting clamping mechanism of a laser cutting machine.
[0017] Figure 2 It is a front view of the present application, a pipe fitting clamping mechanism of a laser cutting machine.
[0018] Figure 3 It is a rear view of the present application, a pipe fitting clamping mechanism of a laser cutting machine.
[0019] Figure 4 It is a left view of the lower clamping assembly in the present application.
[0020] Figure 5 It is Figure 4 A-A sectional view in the present application.
[0021] Figure 6 It is a perspective view of the rotating shaft in the present application.
[0022] Figure 7 It is a working schematic view when the pipe fitting profile is clamped by the pipe fitting clamping mechanism of the laser cutting machine in the present application.
[0023] Figure 8 It is a working schematic view when the square profile is clamped by the pipe fitting clamping mechanism of the laser cutting machine in the present application.
[0024] BRIEF DESCRIPTION OF DRAWINGS 1, base plate; 11, through hole; 12, through slot; 2, upper clamping assembly; 3, lower clamping assembly; 31. Left rotary seat; 32. Right rotary seat; 33. Rotary shaft; 331. Spiral groove; 332. Annular groove; 34. Left sliding sleeve; 341. Idler roller; 35. Right sliding sleeve; 36. Left spring; 37. Right spring; 38. Wear-resistant sleeve; 381. Internal key; 4. Axial guide mechanism; 41. Guide plate; 411. Dovetail groove; 42. Limiting block; 5. Driver components; 51. Left double-acting lead screw; 52. Right double-acting lead screw; 53. Drive shaft; 54. Helical gear set; 55. Servo motor; 56. Spur gear set; 6. Pipe fittings. Detailed Implementation
[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the description of the present invention, terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", and "around" indicate orientation or positional relationship, and are only for the convenience of describing the present invention and simplifying the description, and should not be construed as limiting the present invention.
[0026] Example 1: like Figures 1 to 3 As shown, this invention provides a material clamping mechanism for a laser cutting machine tool. A through hole 11 is formed in the center of a substrate 1, and a tube 6 is pushed into the axis of the through hole 11 by a pushing mechanism. Two symmetrically arranged upper clamping components 2 and lower clamping components 3 are provided on the front side of the substrate 1, positioned on either side of the through hole 11 and equidistant from its axis. Both upper and lower clamping components are slidably mounted on the substrate 1. A driving component 5 on the substrate 1 drives the upper and lower clamping components to move synchronously closer or further apart.
[0027] Combined Figures 4 to 6 As shown, the upper and lower clamping components are symmetrical in structure. The lower clamping component 3 is used as an example for explanation: The lower clamping assembly 3 comprises symmetrical left and right rotating seats 31, 32, which are respectively installed on the two sides of the base plate 1 in an up-down sliding manner. The two ends of the rotating shaft 33 are respectively rotatably installed on the left and right rotating seats 31, 32 through bearings, and the median line of the rotating shaft 33 passes through the axis of the through hole 11. The left and right sliding sleeves 34, 35 are slidably sleeved on the left and right ends of the rotating shaft 33, and the left and right sliding sleeves 34, 35 are symmetrical along the median line of the rotating shaft 33. The left spring 36 is sleeved on the rotating shaft 33 between the left rotating seat 31 and the left sliding sleeve 34, and the opposite surfaces of the left rotating seat 31 and the left sliding sleeve 34 are both provided with a sunken groove for positioning the two ends of the left spring 36; the left spring 36 has a certain pre-pressure and is used for pushing the left sliding sleeve 34 to the right. Similarly, the right spring 37 is symmetrical with the left spring 36 and is used for pushing the right sliding sleeve 35 to the left.
[0028] On the side of the left and right sliding sleeves 34, 35 close to the ends and close to the through hole 11, a roller 341 is rotatably installed; the roller 341 is parallel to the axis of the pipe 6, and the roller 341 is flush with or slightly lower than the side surface of the left sliding sleeve 34 close to the through hole 11. During work, the four rectangularly distributed rollers 341 are used for pressing against the pipe 6, so as to realize clamping and positioning of the pipe 6. The middle of the rotating shaft 33 is provided with an annular groove 332 for avoiding the pipe 6; the annular groove 332 is used for preventing the pipe 6 from contacting the rotating shaft 33 in the process of clamping the pipe 6 by the roller 341.
[0029] The circumferential surface of the left and right ends of the rotating shaft 33 is provided with a helical groove 331 symmetrical along the median line of the rotating shaft 33. The wear-resistant sleeve 38 is fixedly sleeved in the left and right sliding sleeves 34, 35, the wear-resistant sleeve 38 is slidably installed on the rotating shaft 33, the inner wall of the wear-resistant sleeve 38 is fixedly provided with an inner key 381, and the inner key 381 is slidably matched with the corresponding side helical groove 331. An axial guide mechanism 4 is arranged between the left rotating seat 31 and the left sliding sleeve 34 and between the right sliding sleeve 35 and the right spring 37; the axial guide mechanism 4 is used for limiting the left and right sliding sleeves 34, 35 from rotating around the axis of the rotating shaft 33, so that the left and right sliding sleeves 34, 35 can only move left and right.
[0030] In combination Figure 7 As shown in the working process, the upper and lower clamping assemblies move towards the axis of the through hole 11 under the driving of the driving assembly 5, the four rectangularly distributed rollers 341 contact the pipe 6 and move left and right under the pressure of the pipe 6; in this process, the left movement of the left sliding sleeve 34 will drive the rotating shaft 33 to rotate under the action of the helical groove 331 and the inner key 381; similarly, the right movement of the right sliding sleeve 35 will also drive the rotating shaft 33 to rotate; the rotating angle of the rotating shaft 33 is consistent, which forces the left movement of the left sliding sleeve 34 and the right movement of the right sliding sleeve 35 to be consistent, maintains the synchronization of the left and right sliding sleeves 34, 35, and makes the center of the four rectangularly distributed rollers 341 unchanged and always coincide with the axis of the pipe 6, so as to avoid the holding force from deviating and damaging the straightness of the pipe 6.
[0031] Embodiment Two On the basis of the above-mentioned embodiment one, in combination with Figure 1 , Figure 2 , Figure 4 and Figure 5 , the embodiment provides an axial guide mechanism 4, taking the axial guide mechanism 4 at the lower left as an example: Mainly comprising a guide plate 41 and a limiting block 42. The guide plate 41 is fixed on the upper side of the left sliding sleeve 34, the guide plate 41 extends towards the direction of the left rotating seat 31, and the lower side of the guide plate 41 is provided with a dovetail slide rail; the upper side of the left rotating seat 31 is provided with a dovetail groove 411 which is in sliding fit with the dovetail slide rail. The guide plate 41 guides the left sliding sleeve 34 at the same time as the rotating shaft 33, and also limits the left sliding sleeve 34 from rotating around the axis of the rotating shaft 33. In addition, the limiting block 42 is fixed on the upper side of the guide plate 41, and the limiting block 42 is fixed by bolts. According to different diameters of the pipe 6, the thickness of the limiting block 42 can be appropriately replaced and adjusted.
[0032] In combination with Figure 7 , in combination with the description of the working process in embodiment one, the driving assembly 5 drives the upper and lower clamping assemblies to be close to each other, the four rectangularly distributed supporting rollers 341 contact the pipe 6, the left sliding sleeve 34 and the right sliding sleeve 35 gradually move to both sides until the limiting blocks 42 in the upper and lower clamping assemblies contact and press from top to bottom. After the upper and lower limiting blocks 42 are pressed, a certain friction force is provided, so that the left sliding sleeve 34 and the right sliding sleeve 35 cannot move to both sides any more, that is, the positions of the four supporting rollers 341 are fixed, and the pipe 6 is clamped and positioned.
[0033] As can be seen from the above process, the pressure provided by the driving assembly 5 does not directly act on the pipe 6, avoiding the problem that the profile is damaged due to excessive pressure; During clamping, the elastic mechanism formed by the left spring 36, the right spring 37 and the related components provides elastic force, avoiding the problem that the profile is damaged during clamping; After the clamping stroke is completed, the adhesion of the upper and lower limiting blocks 42 forms a self-locking mechanism, solving the problem that the pipe 6 is not clamped stably due to the addition of the elastic mechanism; In addition, as shown in Figure 8 , the pipe clamping mechanism provided by the embodiment is also applicable to the clamping and positioning of square profiles.
[0034] Embodiment Three On the basis of the above-mentioned embodiment one or two, in combination with Figures 1 to 3As shown, the embodiment provides a driving assembly 5 arranged at the back side of the base plate 1. Four rectangularly distributed through-slots 12 are formed at both sides of the base plate 1, and the through-slots 12 at both sides are formed in the up-down direction, and the left rotary seat 31 and the right rotary seat 32 in the upper and lower clamping assemblies are slidingly installed in the corresponding through-slots 12. The portions of the left rotary seat 31 and the right rotary seat 32 penetrating out of the back side of the through-slots 12 are provided with threaded holes, so as to be connected with the driving assembly 5.
[0035] The driving assembly 5 comprises symmetrically and parallelly arranged left and right bidirectional screw rods 51 and 52, and the two ends of the left and right bidirectional screw rods are rotatably installed on a support, and the support is welded at the back side of the base plate 1. The left and right bidirectional screw rods 51 and 52 are threadedly connected with the left rotary seat 31 and the right rotary seat 32 at the corresponding side. A transmission shaft 53 is perpendicular to the left and right bidirectional screw rods, and the transmission shaft 53 is also rotatably installed on the base plate 1 through the support, and the two ends of the transmission shaft 53 are respectively drivingly connected with the end portions of the left and right bidirectional screw rods through a bevel gear set 54, and a servo motor 55 is fixed on the base plate 1, and the output end of the servo motor 55 is connected with the transmission shaft 53 through a spur gear set 56. In working, the forward and reverse rotation of the servo motor 55 drives the transmission shaft 53, and the transmission shaft 53 drives the left and right bidirectional screw rods at both sides to rotate, and further drives the left rotary seat 31 and the right rotary seat 32 at the upper and lower sides to approach or move away from each other.
[0036] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application.
Claims
1. A laser cutting machine tool blank clamping mechanism, characterized in that comprising: a base plate with a through hole in the center for the pipe to pass through; two symmetrical upper and lower clamping assemblies arranged symmetrically and slidingly installed on the base plate on both sides of the through hole; a drive assembly for driving the upper and lower clamping assemblies to move synchronously close to or away from each other; the lower clamping assembly comprises: symmetrical left and right rotary seats slidingly installed on both sides of the base plate respectively; a shaft rotatably installed at both ends of the left and right rotary seats respectively; symmetrical left and right sliding sleeves slidingly sleeved on the left and right ends of the shaft; the close ends of the left and right sliding sleeves are used to support the pipe; a left spring for pushing the left sliding sleeve to the right; a right spring for pushing the right sliding sleeve to the left; wherein the peripheral surface of the left and right ends of the shaft is provided with a helical groove symmetrical along the central vertical line of the shaft, and the inner wall of the left and right sliding sleeves has an inner key matched with the helical groove of the left and right ends.
2. The blank holding mechanism of a laser cutting machine according to claim 1, characterized in that: A roller is rotatably installed on one end of the left sliding sleeve close to the right sliding sleeve; the roller is flush with one side of the left sliding sleeve close to the through hole, and the roller is parallel to the axis of the pipe.
3. The blank holding mechanism of a laser cutting machine according to claim 1, characterized in that: An annular groove is provided in the middle of the shaft for avoiding the pipe.
4. The blank holding mechanism for a laser cutting machine according to claim 1, wherein: A wear-resistant sleeve is fixedly installed in the left sliding sleeve, and the inner wall of the wear-resistant sleeve is fixed with the inner key.
5. The laser cutting machine blank holding mechanism according to claim 1, characterized in that: The left spring is sleeved on the shaft between the left rotary seat and the left sliding sleeve, and a recess is provided on the opposite surface of the left rotary seat and the left sliding sleeve to match the end of the left spring.
6. A laser cutting machine tool blank holding mechanism according to claim 1, characterized in that: An axial guide mechanism is provided between the left rotary seat and the left sliding sleeve, and between the right sliding sleeve and the right spring, for limiting the rotation of the left and right sliding sleeves around the shaft.
7. A laser cutting machine tool blank holding mechanism according to claim 6, characterized in that: The axial guide mechanism between the left rotary seat and the left sliding sleeve comprises a guide plate; the guide plate is fixed on the side of the left sliding sleeve close to the upper clamping assembly, and extends to the left rotary seat and is attached to the left rotary seat; The guide plate and the left rotary seat are slidingly matched through dovetail grooves.
8. A laser cutting machine tool blank holding mechanism according to claim 7, characterized in that: A limiting block is fixed on the side of the guide plate close to the upper clamping assembly.
9. The laser cutting machine tool blank holding mechanism according to claim 1, wherein: Four rectangularly distributed through grooves are provided on both sides of the base plate, and the left and right rotary seats in the upper and lower clamping assemblies are slidingly installed in the corresponding through grooves; the drive assembly is fixed on the side of the base plate away from the upper and lower clamping assemblies, and the output end of the drive assembly is fixedly connected with the left and right rotary seats.
10. A laser cutting machine tool blank holding mechanism according to claim 9, wherein, The drive assembly comprises: left and right bidirectional screws rotatably installed on the base plate, the left bidirectional screw is threadedly connected with the left rotary seat in the upper and lower clamping assemblies at both ends, and the right bidirectional screw is threadedly connected with the right rotary seat in the upper and lower clamping assemblies at both ends; a transmission shaft rotatably installed on the base plate, the transmission shaft is connected with the end portions of the left and right bidirectional screws through bevel gear sets at both ends; a servo motor fixed on the base plate, the output end of the servo motor is connected with the transmission shaft through spur gear sets.