Tool for rapid focusing

Abstract

The utility model relates to a tool used for rapid focusing. The tool comprises a fixing member, one or more cushion layers and a focus simulation member. The fixing piece penetrates through one or more cushion layers and is detachably connected with the focus simulation piece, and the cushion layers are of elastic structures; the end, not penetrating through the cushion layer, of the fixing piece limits the cushion layer. The beneficial effects of the utility model are that the distance between the focus simulation piece and the workpiece can be increased, and the risk of contact with the workpiece during simulation of an empty test is avoided; it is guaranteed that the tool does not fall out in the movement process after being plugged into the cladding nozzle, in addition, the cushion layer is elastic, and the cladding nozzle can be plugged into and pulled out conveniently; if the rubber ring is abraded after the tool is used for many times, only the fixing piece needs to be slightly screwed; when a simulation empty test is carried out, if a smaller gap is needed, a gasket with a corresponding thickness can be additionally arranged between the cushion layer and the focus simulation piece; and the capacitance sensor can enable an operator to more accurately know the distance between the cladding head and the workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of laser cladding welding technology, and in particular relates to a tooling for rapid focusing. Background Technology

[0002] Laser cladding is increasingly being used in the additive manufacturing industry. The laser cladding process requires the distance between the cladding nozzle and the working surface to remain constant. However, the current focusing method mainly uses a focusing block for focusing. During the no-load test run, since the focusing block has been removed, it is difficult to check whether the distance between the nozzle and the workpiece surface has changed.

[0003] Currently, there are also methods that use two visible laser beams for focusing, but due to limitations in processing site conditions and environment, this focusing method is not suitable for many occasions. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tooling for rapid focusing.

[0005] This tooling for rapid focusing, used in conjunction with a cladding nozzle, includes: a fixing element, one or more pads, and a focus simulation element; the fixing element is detachably connected to the focus simulation element through one or more pads, and the pads are elastic structures; the end of the fixing element that does not pass through the pads limits the pads; the diameter of the end of the fixing element that does not pass through the pads is smaller than the diameter of the circular hole on the cladding nozzle, and the tooling is an axisymmetric structure.

[0006] As a preferred option:

[0007] The padding layer is a deformable annular structure; the focal simulation component is a conical structure with an internal cavity; the fixing component includes a limiting part and a shaft, the shaft is fixedly located at the center of the limiting part, the outer diameter of the shaft is smaller than the inner diameter of the padding layer, and the area of ​​the limiting part is larger than the area of ​​the central cavity of the padding layer; one end of the shaft is connected to the limiting part, and the other end of the shaft extends through the interior of multiple padding layers to the focal simulation component, the shape of the cavity in the focal simulation component matches the shape of the shaft, and the length of the cavity is greater than the difference between the length of the shaft and the thickness of the multiple padding layers.

[0008] Preferably, one or more shims with a shape similar to the shims are provided between the multi-layer shims and the focal simulation element, and the shims are used to adjust the distance between the focal simulation element and the workpiece.

[0009] As a preferred embodiment: the fastener is a hex socket head cap screw, and the washer is a deformable rubber ring; the inner wall of the cavity in the focal simulation component is provided with threads that match the threads on the surface of the hex socket head cap screw.

[0010] As a preferred option, the focal simulation component is made of aluminum alloy.

[0011] As a preferred option, a capacitive sensor is installed on the focal simulation part, which allows the operator to know the distance between the cladding head and the workpiece more accurately, and the travel trajectory of the laser cladding head can be corrected more precisely, thus improving the effect and accuracy of laser cladding.

[0012] The beneficial effects of this utility model are:

[0013] The tooling designed in this invention for rapid focusing can increase the distance between the focus simulation component and the workpiece, avoiding the risk of contact with the workpiece during simulated dry testing.

[0014] Since the outer diameter of the pad on the tooling of this utility model is slightly larger than the round hole at the cladding nozzle, the pad and the cladding nozzle are in an interference fit state, which ensures that the tooling will not fall out during the movement after being inserted into the cladding nozzle. In addition, the pad is elastic, making it easy to insert and pull out the cladding nozzle.

[0015] If the rubber ring of the tooling designed for rapid focusing wears out after repeated use, simply tighten the fixing part slightly. If a smaller gap is required during simulated air testing, a shim of appropriate thickness can be added between the pad and the focus simulation component.

[0016] This invention features a capacitive sensor installed on the focal simulation component, allowing operators to more accurately determine the distance between the cladding head and the workpiece. This enables more precise correction of the laser cladding head's trajectory, resulting in improved laser cladding effect and accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembled tooling for rapid focusing according to this utility model.

[0018] Figure 2 This is a schematic diagram of the tooling before installation of this utility model;

[0019] Figure 3 This is a schematic diagram of the tooling of this utility model after installation;

[0020] Figure 4 This is a schematic diagram of the tooling for rapid focusing according to this utility model before assembly.

[0021] Explanation of reference numerals in the attached drawings: 1. Fixing element; 2. Pad layer; 3. Focal point simulation element; 4. Cladding nozzle; 5. Gasket. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0023] Example 1

[0024] like Figures 1 to 4 As shown, a tooling for rapid focusing includes: a fixing member 1, one or more pads 2, and a focus simulation member 3 made of aluminum alloy; the fixing member 1 is detachably connected to the focus simulation member 3 through one or more pads 2, and the pads 2 are elastic structures; the end of the fixing member 1 that does not pass through the pads 2 limits the pads 2; the diameter of the end of the fixing member 1 that does not pass through the pads 2 is smaller than the diameter of the circular hole on the cladding nozzle 4, and the tooling has an axisymmetric structure;

[0025] The fastener 1 is an internal hex screw (M4*16 cylindrical head internal hex screw (GB / T 70.1), with a screw head diameter of 6.78 to 7.22 mm, and the screw head part is machined to φ6.8±0.1), and the pad 2 is a deformable rubber ring (a rectangular cross-section rubber ring with an inner diameter of 4 mm and an outer diameter of 7 mm); the height of the focal simulation part 3 is H=15 mm; the inner wall of the cavity inside the focal simulation part 3 is provided with threads that match the threads on the surface of the internal hex screw.

[0026] Example 2

[0027] Based on Example 1, this example further includes one or more shims 5 with a shape similar to that of the pad 2 between the pad 2 and the focal simulation component 3. The shims are used to adjust the distance between the focal simulation component and the workpiece.

[0028] Example 3

[0029] Based on Embodiments 1 and 2, this embodiment installs a capacitive sensor on the focal simulation component 3. All capacitive sensors are electrically connected to the host computer, which allows the operator to know the distance between the cladding head and the workpiece more accurately. The travel trajectory of the laser cladding head can be more accurately corrected, which will improve the effect and accuracy of laser cladding.

[0030] When using the tooling for rapid focusing in Examples 1 to 3:

[0031] This fixture is used on a laser cladding platform. The focal point of the Trumpf D70+SO16 cladding head is 16mm directly in front of the axis of the cladding nozzle 4, and the diameter of the circular hole at the cladding nozzle 4 is 7mm.

[0032] The internal hexagon screw is inserted through the rubber ring into the cavity inside the focus simulation part 3, and the internal hexagon screw is screwed into the focus simulation part 3. By adjusting the internal hexagon screw, the screw head of the internal hexagon screw presses the rubber ring, causing the rubber ring to deform. Finally, the outer diameter of the rubber ring is slightly larger than the round hole on the cladding nozzle 4, thus obtaining the tooling of this utility model.

[0033] The assembled tooling is inserted into the cladding nozzle 4. Since the outer diameter of the rubber ring on the tooling is slightly larger than the round hole at the cladding nozzle 4, the rubber ring and the cladding nozzle 4 are in an interference fit state, which ensures that the tooling will not fall out during the movement after being inserted into the cladding nozzle 4. In addition, the rubber ring is elastic, making it easy to insert and remove the cladding nozzle 4.

[0034] During simulated no-load testing, if a smaller gap is required, a shim of appropriate thickness can be added between the shim layer and the focal simulation part (for example, if the focal simulation part needs to be 0.8mm away from the workpiece, the shim thickness is 0.2mm).

[0035] Depending on the focal position of different brands and models of cladding nozzles, and the size of the orifice on the cladding nozzle, the dimensions of this tooling can be changed to adapt to other cladding nozzles.

Claims

1. A tooling for rapid focusing, used in conjunction with a cladding nozzle (4), characterized in that, include: The fixture comprises a fastener (1), one or more pads (2), and a focal simulation element (3); the fastener (1) is detachably connected to the focal simulation element (3) through one or more pads (2), and the pads (2) are elastic structures; the end of the fastener (1) that does not pass through the pads (2) limits the pads (2); the diameter of the end of the fastener (1) that does not pass through the pads (2) is smaller than the diameter of the circular hole on the cladding nozzle (4), and the fixture is an axisymmetric structure.

2. The tooling for rapid focusing according to claim 1, characterized in that: The pad (2) is a deformable annular structure; the focal simulation component (3) is a conical structure with an internal cavity; the fixing component (1) includes a limiting part and a shaft, the shaft is fixedly located at the center of the limiting part, the outer diameter of the shaft is smaller than the inner diameter of the pad (2), and the area of ​​the limiting part is larger than the area of ​​the central cavity of the pad (2); one end of the shaft is connected to the limiting part, and the other end of the shaft extends through the interior of multiple pads (2) to the focal simulation component (3), the shape of the cavity in the focal simulation component (3) matches the shape of the shaft, and the length of the cavity is greater than the difference between the length of the shaft and the thickness of the multiple pads (2).

3. The tooling for rapid focusing according to any one of claims 1 or 2, characterized in that: One or more gaskets (5) with a shape similar to that of the pad (2) are provided between the pad (2) and the focal simulation part (3).

4. The tooling for rapid focusing according to claim 1, characterized in that: The fastener (1) is an internal hexagon screw, and the pad (2) is a deformable rubber ring; the inner wall of the cavity in the focal simulation part (3) is provided with a thread that matches the thread on the surface of the internal hexagon screw.

5. The tooling for rapid focusing according to claim 1, characterized in that: The focal simulation component (3) is made of aluminum alloy.

6. The tooling for rapid focusing according to claim 1, characterized in that: A capacitive sensor is installed on the focal simulation component (3).

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