CN102179633A - Hand type laser cutting head with clamping function - Google Patents

Abstract

The invention discloses a hand-held laser cutting head with a clamping function. The device includes a housing, a laser output head (8), a pull rod handle (4), a pull rod (5), a reset plate (6), and a spring (7). , the mechanical gripper (11), the focus adjustment transmission mechanism (14); the pull rod (5) runs through the housing, one end of which is connected to the pull rod handle (4), and the other end is connected to the mechanical gripper (11), the pull rod (5) Rigidly connected with the reset plate (6); one end of the spring (7) is fixed on the reset plate (6), and the other end is fixed on the housing; the laser output head (8) passes The laser head support sleeve (9) and the laser head fixing screw (10) are fixed on the housing, and the laser outlet is on the same side as the mechanical gripper (11); the laser output head (8) is equipped with the focus adjustment Transmission mechanism (14). The device has a simple structure and is convenient to use, and is especially suitable for cutting rope-like objects.

Description

A handheld laser cutting head with clamping function

technical field

The invention belongs to the technical field of laser cutting, and in particular relates to a laser cutting device which is easy to hold and can hold an object to be cut.

Background technique

Laser cutting is the most widely used laser processing technology, widely used in various industries, such as automobile manufacturing, machine tool manufacturing, petrochemical industry, etc., but the existing laser cutting devices have two shortcomings: (1) Most of them are Offline laser cutting means that the object to be cut must be placed on the workbench. (2) The clamping and positioning of the object to be cut is controlled separately from the implementation of laser cutting, so the whole device is complicated and heavy. This limits the application of laser cutting technology in online processing, online maintenance, online rescue, etc. In the actual engineering application process, it is necessary to cut objects online in many occasions, such as the cutting of underwater steel cables wrapped around propellers during ship navigation, the dismantling of steel bars in civil construction waste, and so on. For the on-line laser cutting technology, people have also tried to find some methods or devices that can be applied on-line. The closest to the present invention is the patent published on 2010.10.20 (document number: CN101862911A, patent name: a hand-held laser cutting method), which provides a hand-held laser cutting method, during the laser cutting process, can Use the two indicating red lights in the hand-held laser cutting head to intersect the surface of the object to be cut to indicate laser cutting. However, the method provided in this patent cannot realize the clamping and positioning of the object to be cut. When implementing laser cutting, it mainly depends on the operator's operation stability to control the distance between the laser output head and the object to be cut, and cannot guarantee the accuracy of the entire laser cutting process. The process is carried out stably and reliably.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a hand-held laser cutting head that integrates the clamping and positioning of the object to be cut and the laser output.

The technical solution adopted in the present invention is: a hand-held laser cutting head with a clamping function, including a housing, a laser output head, a pull rod handle, a pull rod, a reset plate, a spring, a mechanical gripper, and a focus adjustment transmission mechanism; The pull rod runs through the housing, one end of which is connected to the handle of the pull rod, and the other end is connected to the mechanical gripper, and the pull rod is rigidly connected to the reset plate; one end of the spring is fixed on the reset plate, and the other end is fixed to the housing On the body; the mechanical gripper is connected to the housing through a connecting rod and a fixed plate, the fixed plate and the housing are rigidly connected, the connecting rod and the fixed plate are movably connected, and the mechanical gripper It is movably connected with the connecting rod; the laser output head is fixed on the shell through the laser head support sleeve and the laser head fixing screw, and the laser outlet is on the same side as the mechanical gripper; the laser output head is installed with a Describe the focus adjustment transmission mechanism.

A focus adjustment handle is connected to the focus adjustment transmission mechanism.

The pull rod handle and handle are on the same side of the housing. A laser switch and an auxiliary gas switch are installed on the handle.

The focus adjustment transmission mechanism is a mechanical transmission mechanism capable of transmitting motion between the interlaced axes.

Further, the focus adjustment transmission mechanism includes a spur gear and a rack. The spur gear is coaxial with the focus adjustment handle, and its axis is perpendicular to the axis of the laser output head. The spur gear meshes with the rack. The rack is rigidly connected with the laser output head.

The technical effect of the invention is: the mechanical gripper, the laser head and the focus adjustment transmission mechanism are integrated into a simple device, which realizes the effective integration of clamping, positioning and laser output of the object to be cut, and its structure is simple; through the handle and The cooperation of the pull rod handle makes the equipment easy to use and one-handed operation; because the mechanical gripper is easy to use and can be rotated after positioning, the device is suitable for cutting rope-like objects.

Description of drawings

Fig. 1 is a schematic diagram of a hand-held laser cutting head with clamping function provided by the present invention;

Among them: 1. handle, 2. laser switch, 3. auxiliary gas switch, 4. lever handle, 5. lever, 6. reset plate, 7. spring, 8. laser output head, 9. laser head support sleeve, 10. Laser head locking screw, 11. Mechanical gripper, 12. Object to be cut, 13. Focus adjustment handle, 14. Focus adjustment transmission mechanism, 15. Optical fiber, 16. Auxiliary gas pipeline, 17. Connecting rod, 18. Fixed plate .

Detailed ways

Figure 1 is an embodiment of the present invention, which includes a housing, a laser output head 8, a pull rod handle 4, a pull rod 5, a reset plate 6, a spring 7, a mechanical gripper 11, and a focus adjustment transmission mechanism 14; the pull rod 5 runs through the housing , one end of which is connected to the lever handle 4, the other end is connected to the mechanical gripper 11, the lever 5 passes through the reset plate 6, and is rigidly connected with it; one end of the spring 7 is fixed on the reset plate 6, and the other end is fixed on the shell The mechanical gripper 11 is connected with the housing through the connecting rod 17 and the fixed plate 18, which is rigidly connected between the fixed plate 18 and the housing, the connecting rod 17 and the fixed plate 18 are movable connections, and the mechanical gripper 11 and the connecting rod 17 are Flexible connection; the laser output head 8 is fixed on the housing through the laser head support sleeve 9 and the laser head fixing screw 10, and the laser outlet is on the same side as the mechanical gripper 11; the laser output head 8 is equipped with a focus adjustment transmission mechanism 14, A focus adjustment handle 13 is connected to the focus adjustment transmission mechanism 14 . The lever handle 4 and the handle 1 are on the same side of the housing, and the handle 1 is equipped with a laser switch 2 and an auxiliary gas switch 3 .

The focus adjustment transmission mechanism 14 can be any mechanical transmission mechanism that can transmit motion between the interleaved axes. The focus adjustment transmission mechanism 14 in the embodiment comprises a spur gear and a rack, the spur gear is coaxial with the focus adjustment handle 13, and its axis is perpendicular to the axis of the laser output head 8, the spur gear meshes with the rack, and the rack and the laser output head 8 are rigidly connected together.

When using this device to implement laser cutting, the operator holds the handle 1, lifts the handle 4 of the pull rod, the pull rod 5 moves up as a whole, the reset plate 6 moves up together with the pull rod 5, and the spring 7 fixed to the reset plate at one end is pulled apart, so Moving up the pull bar needs to overcome the reset elastic force of the spring 7. The pull rod 5 moves up to drive the clamping mechanical gripper 11 to tighten, and after clamping the object 12 to be cut, the operator turns on the laser through the laser switch 2 on the handle 1, and the laser acts on the surface of the object to be cut through the laser output head 8 to implement laser cutting .

Before or during laser cutting, the power density acting on the surface of the object to be cut can be adjusted through the focus adjustment mechanism 14 as required. The specific operation is: loosen the laser output head fixing screw 10, rotate the focus adjustment handle 13, and control the laser output head 8 to move up and down as a whole through the focus adjustment transmission mechanism 14, so as to change the size of the light spot acting on the surface of the object to be cut, that is, to change the size of the light spot acting on the surface of the object to be cut. The size of the surface power density of the object to be cut. After the adjustment, lock the laser output head fixing screw 10 and continue to implement laser cutting. After cutting off the object, turn off the laser, unclamp the pull bar 2, under the reset elastic force of the spring 7, the pull bar 5 moves down, the mechanical gripper 11 opens, and the object 12 to be cut is released, and the laser cutting process is completed.

When the object to be cut is a rope-shaped object with a thicker diameter, for a specific point in the axial direction, multi-point laser cutting can be implemented from different angles in the radial direction to ensure that the object is cut through. Specific implementation method: when radial multi-point laser cutting is required, the operator first turns off the laser and releases the object 12 to be cut. Hold the handle 1 of the laser cutting head, rotate an angle in the original position along the radial direction of the object to be cut, re-clamp the object 12 to be cut, turn on the laser, and implement laser cutting. The size of the radial rotation angle can be determined voluntarily according to the diameter of the object 12 to be cut. When the diameter was larger, the rotation angle was a little smaller.

The laser output head 8 is connected to the internal core component optical fiber 12, and the laser light transmitted in the optical fiber 12 can come from a fiber laser, or from some lasers whose output laser is suitable for transmission in an optical fiber, such as the 1064nm laser output by Nd ³⁺ :YAG . The laser switch 2 is an electrical switch connected with the laser source for controlling the laser source on and off.

During the laser cutting process, according to actual needs, the auxiliary gas switch 3 on the handle can be used to control the opening and closing of the auxiliary gas. The auxiliary gas switch 3 is an electrical switch connected with the auxiliary gas source for controlling the opening and closing of the auxiliary gas source.

When the handheld laser cutting head with clamping function is used in a dusty or water environment, in order to protect the core optical components, it is necessary to set a protective mirror in the laser output head. In addition, in order to prevent the dust from scattering the laser or the water environment from absorbing the laser, resulting in increased laser transmission loss, it is recommended that the auxiliary gas must be turned on in a dusty or water environment. The high-pressure auxiliary gas can help blow off the laser transmission optical path The dust in the medium, or the water on the surface of the object to be cut is drained to reduce the laser transmission loss, so as to ensure the effective implementation of laser cutting.

The device integrates the machine gripper, laser head and focus adjustment transmission mechanism into a simple device, which realizes the effective integration of clamping, positioning and laser output of the object to be cut. Its structure is simple; through the cooperation of the handle and the handle of the pull rod, Make the equipment easy to use and easy to operate with one hand; because the mechanical grasp is easy to use and can be rotated after positioning, it is especially suitable for occasions that need to cut rope-like objects, such as cutting underwater steel cables wrapped around ship propellers, buildings Rebar dismantling, etc.

Claims (6)

1. A hand-held laser cutting head with a clamping function, including a housing, a laser output head (8), a pull rod handle (4), a pull rod (5), a reset plate (6), a spring (7), a mechanical grip Hand (11), focus adjustment transmission mechanism (14); characterized in that: the pull rod (5) runs through the housing, one end of which is connected to the handle of the pull rod (4), and the other end is connected to the mechanical gripper (11), the The pull rod (5) is rigidly connected to the reset plate (6); one end of the spring (7) is fixed on the reset plate (6), and the other end is fixed on the housing; the mechanical gripper (11) It is connected with the shell through the connecting rod (17) and the fixed plate (18), the fixed plate (18) is rigidly connected with the shell, and the connecting rod (17) and the fixed plate (18) are movable connection, the mechanical gripper (11) and the connecting rod (17) are flexibly connected; the laser output head (8) is fixed to the housing through the laser head support sleeve (9) and the laser head fixing screw (10) , the laser exit is on the same side as the mechanical gripper (11); the focus adjustment transmission mechanism (14) is installed on the laser output head (8). 2. A hand-held laser cutting head with clamping function according to claim 1, characterized in that a focus adjustment handle (13) is connected to the focus adjustment transmission mechanism (14). 3. A hand-held laser cutting head with clamping function according to claim 1, characterized in that: the pull rod handle (4) and the handle (1) are on the same side of the housing. 4. A hand-held laser cutting head with clamping function according to claim 2, characterized in that: the focus adjustment transmission mechanism (14) is a mechanical transmission mechanism that can transmit movement between staggered axes. 5. A hand-held laser cutting head with clamping function according to claim 4, characterized in that: the focus adjustment transmission mechanism (14) includes a spur gear and a rack, and the spur gear and the focus adjustment handle coaxial, the axis of which is perpendicular to the axis of the laser output head (8), the spur gear meshes with the rack, and the rack is rigidly connected with the laser output head (8). 6. A handheld laser cutting head with clamping function according to claim 1, characterized in that: a laser switch (2) and an auxiliary gas switch (3) are installed on the handle (1).

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