Focusing device of laser cutting head

Abstract

The focusing device of the laser cutting head comprises a focusing end, a driving end and a guiding assembly, the focusing end comprises a focusing assembly, and the focusing assembly comprises an outer sleeve and a focusing lens. The focus lens is arranged in the outer sleeve, and a connecting part is arranged on one side, in the first direction, of the outer sleeve. The driving end and the connecting part are arranged on the same side and comprises a driving assembly, a base and a shell. The base is arranged below the connecting part and bears the driving assembly, and the shell covers the driving assembly. The connecting part is connected with the driving assembly and used for driving the outer sleeve to move in the second direction relative to the base. The guide assembly comprises a first linear sliding rail and a second linear sliding rail. The first linear sliding rail and the second linear sliding rail are arranged on the two sides, in the third direction, of the connecting part correspondingly and extend in the second direction. The two ends, in the third direction, of the first linear sliding rail and the two ends, in the third direction, of the second linear sliding rail are connected with the connecting part and the shell correspondingly and used for conducting auxiliary stable guiding on movement of the outer sleeve, and therefore position deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laser heads, and particularly relates to a focusing device for a laser cutting head. Background Art

[0002] In a laser processing system, for processing forms such as laser cutting, laser welding, and laser cladding, it is necessary to control the laser head to adjust the position of the working focus of the laser head relative to the workpiece according to the changes in the workpiece material and workpiece thickness. For example, the working focus is adjusted to be located on the surface, inside, or bottom of the workpiece.

[0003] In the prior art, a driving mechanism drives the focusing end to move. During the movement of the focusing end in a certain direction, if the spot diameter on the spot image gradually becomes larger, the controller sends a feedback signal to the driving mechanism to drive the focusing end to slide in the opposite direction; if the spot diameter on the spot image gradually becomes smaller, the controller sends a feedback signal to the driving mechanism to drive the focusing end to continue sliding in this direction until the spot diameter on the obtained spot image is the smallest, and then the controller sends a feedback signal to the driving mechanism to make the focusing end stop moving.

[0004] However, during the movement of the driving mechanism, a certain position deviation may occur in the focusing end, affecting the subsequent processing effect. Summary of the Utility Model

[0005] To overcome the above disadvantages, the purpose of the utility model is to provide a focusing device for a laser cutting head to solve the problem that a certain position deviation may occur in the focusing end during the movement of the driving mechanism as mentioned in the above background art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is a focusing device for a laser cutting head, including:

[0007] A focusing end, including a focusing component. The focusing component includes an outer sleeve and a focusing lens. The focusing lens is arranged inside the outer sleeve, and a connecting portion is arranged on one side of the outer sleeve along the first direction.

[0008] A driving end, arranged on the same side as the connecting portion, including a driving component, a base, and a housing. The base is arranged below the connecting portion, carrying the driving component, and the housing covers the driving component. The connecting portion is connected to the driving component and is used to drive the outer sleeve to move relative to the base along the second direction.

[0009] The guiding component includes a first linear slide rail and a second linear slide rail. The first linear slide rail and the second linear slide rail are respectively arranged on both sides of the connecting portion along the third direction, and both extend along the second direction. Both ends of the first linear slide rail and the second linear slide rail along the third direction are respectively connected to the connecting portion and the housing, and are used to assist in stably guiding the movement of the outer sleeve. The first direction, the second direction, and the third direction are perpendicular to each other.

[0010] For the focusing device provided by the present utility model, by arranging a first linear slide rail and a second linear slide rail at both ends of the driving component and the connecting portion, during the process of the driving component driving the outer sleeve to move along the second direction, the movement of the outer sleeve is assisted and stably guided to avoid positional deviation.

[0011] In some embodiments, the driving component includes a servo motor, a ball screw, and a screw nut. The ball screw extends along the second direction, the top is connected to the coupling of the servo motor, and the bottom is connected to the base. The screw nut is sleeved on the ball screw, the connecting portion is sleeved on the screw nut, and the housing covers the ball screw and the screw nut.

[0012] Adopting the above technical solution, the servo motor exhibits extremely high stability during low-speed operation and does not show the stepping phenomenon similar to that of a stepping motor. And its dynamic response time for acceleration and deceleration is extremely short and the precision is high. Therefore, it is suitable for the occasions that require high-precision positioning and motion control in this solution. The ball screw rotates forward or reverse correspondingly through the forward and reverse rotation of the servo motor, so that the screw nut moves up and down on the ball screw, driving the outer sleeve to move up and down.

[0013] In some embodiments, the driving end further includes a mounting seat. The mounting seat includes a bearing section and a connecting section. The bearing section extends along the first direction, is arranged above the outer sleeve, and bears the servo motor. The connecting section extends along the second direction, is arranged on the other side of the outer sleeve along the first direction, and is connected to the bearing section. The housing is arranged between the bearing section and the base.

[0014] In some embodiments, the guiding component further includes a third linear slide rail. The third linear slide rail extends along the second direction and is arranged on the same side as the connecting section. Both ends of the third linear slide rail along the first direction are respectively connected to the connecting section and the outer sleeve.

[0015] Adopting the above technical solution, the third linear slide rail, together with the first linear slide rail and the second linear slide rail, acts together to assist in stably guiding the movement of the outer sleeve.

[0016] In some embodiments, the focusing end further includes an adapter base. The adapter base is disposed below the focusing assembly, connected to the focusing assembly at the top, and connected to the laser cutting head at the bottom. Along the first direction, a convex portion extending along the first direction is provided on one side of the adapter base facing the base, and a corresponding slot is provided on one side of the base facing the adapter base for sliding cooperation with the convex portion along the second direction.

[0017] With the above technical solution, in the first direction, the third linear slide rail and the cooperation of the convex portion and the slot are used for guiding and limiting; in the third direction, the first linear slide rail and the second linear slide rail are used for guiding and limiting, so as to avoid position deviation caused by the movement of the focusing assembly.

[0018] In some embodiments, the driving assembly further includes a telescopic tube. The telescopic tube is sleeved on the top end and the bottom end of the ball screw respectively.

[0019] With the above technical solution, the telescopic tube elastically limits the movement of the screw nut, avoiding the direct contact between the screw nut and the mounting seat or the base.

[0020] In some embodiments, the focusing assembly further includes an inner sleeve. The outer sleeve is sleeved on the inner sleeve and forms an internal channel extending along the second direction, and the focusing lens is disposed in the internal channel.

[0021] With the above technical solution, the outer sleeve and the inner sleeve cooperate to form an internal channel to provide a precise transmission channel for the focusing optical path, ensuring the accuracy of the laser position. Description of the Drawings

[0022] Figure 1 is a perspective view of an embodiment of a focusing device for a laser cutting head of the present invention;

[0023] Figure 2 is a partial structural schematic diagram of an embodiment of a focusing device for a laser cutting head of the present invention;

[0024] Figure 3 is a sectional view of an embodiment of a focusing device for a laser cutting head of the present invention;

[0025] In the figure:

[0026] 1 - Focusing device; 20 - Focusing assembly; 21 - Outer sleeve; 22 - Focusing lens; 23 - Inner sleeve; 24 - Internal channel; 25 - Adapter base; 250 - Convex part; 26 - Connecting part; 30 - Driving assembly; 31 - Servo motor; 32 - Ball screw; 33 - Screw nut; 34 - Base; 340 - Card slot; 35 - Outer shell; 36 - Mounting seat; 37 - Bearing section; 38 - Connecting section; 39 - Telescopic tube; 4 - Guide assembly; 40 - First linear slide rail; 41 - Second linear slide rail; 42 - Third linear slide rail; 5 - Laser cutting head. Detailed implementation mode

[0027] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0028] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] The following elaborates on the preferred embodiments of the present utility model in conjunction with the drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0032] Reference Figures 1 to 3 , Figure 1 shows a perspective view of a focusing device of a laser cutting head provided by an embodiment of the present utility model; Figure 2 shows a partial structural schematic diagram of a focusing device of a laser cutting head provided by an embodiment of the present utility model; Figure 3 shows a sectional view of a focusing device of a laser cutting head provided by an embodiment of the present utility model.

[0033] As Figure 1 and Figure 2 shown, the technical solution provided in the drawings of the present application is a focusing device 1 of a laser cutting head, including a focusing end, a driving end and a guiding component. Among them, the focusing end includes a focusing component 20, and the focusing component 20 includes an outer sleeve 21 and a focusing lens 22. The focusing lens 22 is arranged inside the outer sleeve 21, and a connecting portion 26 is provided on one side of the outer sleeve 21 along the first direction ( Figure 1 shown as the X direction in Figure 1 ). The driving end is arranged on the same side as the connecting portion 26, and includes a driving component 30, a base 34 and a housing 35. The base 34 is arranged below the connecting portion 26 to carry the driving component 30, and the housing 35 covers the driving component 30. The connecting portion 26 is connected to the driving component 30 for driving the outer sleeve 21 to move relative to the base 34 along the second direction ( Figure 1 shown as the Z direction in

[0034] ). The guiding component includes a first linear slide rail 40 and a second linear slide rail 41. The first linear slide rail 40 and the second linear slide rail 41 are respectively arranged on the connecting portion 26 along the third direction ( Figure 1On both sides of the Y direction (as shown), and both extend along the second direction. Both ends of the first linear slide rail 40 and the second linear slide rail 41 along the third direction are respectively connected to the connecting portion 26 and the housing 35, and are used to assist in stably guiding the movement of the outer sleeve 21. The first direction, the second direction, and the third direction are perpendicular to each other.

[0035] For the focusing device 1 provided in the present application, by arranging the first linear slide rail 40 and the second linear slide rail 41 at both ends of the driving component 30 and the connecting portion 26, during the process of the driving component 30 driving the outer sleeve 21 to move along the second direction, the movement of the outer sleeve 21 is assisted in stably guiding to avoid deviation in position.

[0036] In some embodiments, referring to Figures 1 to 3 , the driving component 30 includes a servo motor 31, a ball screw 32, and a screw nut 33. The ball screw 32 extends along the second direction, the top is connected to the coupling of the servo motor 31, and the bottom is connected to the base 34. The screw nut 33 is sleeved on the ball screw 32, the connecting portion 26 is sleeved on the screw nut 33, and the housing 35 covers the ball screw 32 and the screw nut 33.

[0037] Exemplarily, the servo motor 31 exhibits extremely high stability during low-speed operation and does not show the stepping phenomenon similar to that of a stepper motor. And its dynamic response time for acceleration and deceleration is extremely short and the precision is high. Therefore, it is suitable for the occasions where high-precision positioning and motion control are required in this solution. The ball screw 32 rotates forward or reverse correspondingly through the forward and reverse rotation of the servo motor 31, so that the screw nut 33 moves up and down on the ball screw 32, driving the outer sleeve 21 to move up and down.

[0038] In some embodiments, referring to Figures 1 to 3 , the driving end further includes a mounting base 36. The mounting base 36 includes a bearing section 37 and a connecting section 38. The bearing section 37 extends along the first direction, is arranged above the outer sleeve 21, and bears the servo motor 31. The connecting section 38 extends along the second direction, is arranged on the other side of the outer sleeve 21 along the first direction, and is connected to the bearing section 37. The housing 35 is arranged between the bearing section 37 and the base 34.

[0039] In some embodiments, referring to Figures 1 to 3 , the guiding component further includes a third linear slide rail 42. The third linear slide rail 42 extends along the second direction and is arranged on the same side as the connecting section 38. Both ends of the third linear slide rail 42 along the first direction are respectively connected to the connecting section 38 and the outer sleeve 21.

[0040] Exemplarily, the third linear slide rail 42, together with the first linear slide rail 40 and the second linear slide rail 41, assists in stably guiding the movement of the outer sleeve 21.

[0041] In some embodiments, referring to Figures 1 to 3 , the focusing end further includes an adapter base 25. The adapter base 25 is disposed below the focusing assembly 20, connected to the focusing assembly 20 at the top, and connected to the laser cutting head 5 at the bottom. Along the first direction, a convex portion 250 extending along the first direction is provided on one side of the adapter base 25 facing the base 34, and a card slot 340 corresponding to the convex portion 250 is provided on one side of the base 34 facing the adapter base 25 for sliding cooperation with the convex portion 250 along the second direction.

[0042] Exemplarily, in the first direction, the third linear slide rail 42 and the cooperation of the convex portion 250 and the card slot 340 are used for guiding and limiting; in the third direction, the first linear slide rail 40 and the second linear slide rail 41 are used for guiding and limiting, so as to avoid position deviation caused by the movement of the focusing assembly 20.

[0043] In some embodiments, referring to Figures 1 to 3 , the driving assembly 30 further includes a telescopic tube 39. The telescopic tube 39 is sleeved on the top and bottom ends of the ball screw 32 respectively.

[0044] Exemplarily, the telescopic tube 39 elastically limits the movement of the screw nut 33 to avoid the screw nut 33 directly contacting the mounting seat 36 or the base 34.

[0045] In some embodiments, referring to Figures 1 to 3 , the focusing assembly 20 further includes an inner sleeve 23. The outer sleeve 21 is sleeved on the inner sleeve 23 and forms an internal channel 24 extending along the second direction, and the focusing lens 22 is disposed in the internal channel 24.

[0046] Exemplarily, the outer sleeve 21 and the inner sleeve 23 cooperate to form the internal channel 24 to provide an accurate transmission channel for the focusing optical path and ensure the accuracy of the laser position.

[0047] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A focusing device for a laser cutting head, characterized in that: include: A focusing end, comprising a focusing assembly, wherein the focusing assembly comprises an outer sleeve and a focusing mirror; the focusing mirror is arranged in the outer sleeve, and a connecting portion is arranged on one side of the outer sleeve along a first direction; The driving end is arranged on the same side as the connecting portion, and comprises a driving assembly, a base and a shell; the base is arranged below the connecting portion and carries the driving assembly, and the shell cover is arranged on the driving assembly; the connecting portion is connected to the driving assembly and is used to drive the outer sleeve to move relative to the base along the second direction; The guide assembly includes a first linear slide rail and a second linear slide rail; the first linear slide rail and the second linear slide rail are respectively arranged on both sides of the connecting portion along the third direction, and both extend along the second direction; both ends of the first linear slide rail and the second linear slide rail along the third direction are respectively connected to the connecting portion and the outer shell, for assisting in stabilizing and guiding the movement of the outer sleeve, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The focusing device according to claim 1, characterized in that: The driving assembly includes a servo motor, a ball screw, and a screw nut; the ball screw extends along the second direction, the top is connected to the coupling of the servo motor, and the bottom is connected to the base; the screw nut is sleeved on the ball screw, the connecting part is sleeved on the screw nut, and the outer shell cover is provided on the ball screw and the screw nut.

3. The focusing device according to claim 2, characterized in that: The driving end also includes a mounting seat; the mounting seat includes a bearing section and a connecting section, the bearing section extends along the first direction, is arranged above the outer sleeve, and carries the servo motor; the connecting section extends along the second direction, is arranged on the other side of the outer sleeve along the first direction, and is connected to the bearing section; the outer shell is arranged between the bearing section and the base.

4. The focusing device according to claim 3, characterized in that: The guide assembly also includes a third linear slide rail; the third linear slide rail extends along the second direction and is arranged on the same side as the connecting section; the two ends of the third linear slide rail along the first direction are respectively connected to the connecting section and the outer sleeve.

5. The focusing device according to claim 1, characterized in that: The focusing end further includes a transfer seat; the transfer seat is arranged below the focusing assembly, the top of the transfer seat is connected to the focusing assembly, and the bottom of the transfer seat is connected to the laser cutting head; Along the first direction, a convex portion extending along the first direction is provided on one side of the adapter facing the base, and a slot corresponding to the convex portion is provided on one side of the base facing the adapter for slidingly cooperating with the convex portion along the second direction.

6. The focusing device according to claim 2, characterized in that: The driving assembly also includes a telescopic tube; the telescopic tube is respectively sleeved on the top end and the bottom end of the ball screw.

7. The focusing device according to claim 1, characterized in that: The focusing assembly also includes an inner sleeve; the outer sleeve is sleeved on the inner sleeve to form an internal channel extending along the second direction, and the focusing lens is arranged in the internal channel.

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