A laser cutting head QBH joint, nozzle cooling mechanism

Abstract

The application relates to a laser cutting head QBH joint and a nozzle cooling mechanism, which is characterized in that the technical scheme comprises two water cooling covers, the two water cooling covers are arranged in a ring array, and the two water cooling covers are folded to be hollow cylindrical to be clamped and fixed on the laser cutting head; the side, away from the other water cooling cover, of the water cooling cover is provided with two connecting holes for connecting the inside and outside of the water cooling cover; the side, close to the other water cooling cover, of the water cooling cover is provided with a plurality of first threaded holes; the surface of the water cooling cover is further provided with an inner groove for inlaying the protruding edge of the laser cutting head; and the two water cooling covers are detachably connected with the same air cooling cover. The two water cooling covers of the cooling mechanism can be conveniently detached, can be installed on or detached from the laser cutting head according to needs, and can slightly move between the two water cooling covers, so that the cooling mechanism is prevented from being damaged by the extrusion of the laser cutting head due to thermal expansion and cold contraction.

Description

TECHNICAL FIELD

[0001] The application relates to a laser processing device, in particular to a laser cutting head QBH joint and nozzle cooling mechanism. BACKGROUND

[0002] In the process of cutting thick carbon steel, although a good processing effect can be obtained when a QBH joint is used in cooperation with a new type of small-hole nozzle cutting process, the effect of heat dissipation by using auxiliary gas is not good due to the small nozzle, heat is easily accumulated, and the heat extends upward to the QBH joint, the output light or focused light spot has absolute consistency due to the QBH joint, the local temperature rapidly rises, and the temperature of the entire laser cutting head is too high in a short time, thereby leading to the failure to achieve good processing effect quality, and the stability is also reduced. In order to achieve rapid heat dissipation, the water cooling mechanism is directly wrapped and fixed on the laser cutting head in the prior art, the exposed cooling mechanism is easy to be damaged, and once damaged, the entire laser cutting head needs to be discarded, thereby leading to the increase of the use cost of the laser cutting operation. Therefore, a laser cutting head QBH joint and nozzle cooling mechanism is needed, which can be installed on or detached from the laser cutting head as needed.

[0003] In view of the above reasons, how to install or detach the laser cutting head as needed is the problem considered by the application. SUMMARY

[0004] In view of the deficiencies in the prior art, a laser cutting head QBH joint and nozzle cooling mechanism is provided, which can be installed on or detached from the laser cutting head as needed.

[0005] To achieve the above-mentioned purpose, the following technical scheme is provided: a laser cutting head QBH joint and nozzle cooling mechanism, comprising two water cooling covers, the two water cooling covers are arranged in a ring array, and when the two water cooling covers are folded, they are in the shape of a hollow cylinder to be clamped and fixed on the laser cutting head, the side of the water cooling cover away from the other water cooling cover is provided with two connecting holes communicating the inside and outside of the water cooling cover, the side of the water cooling cover close to the other water cooling cover is provided with a plurality of first threaded holes, the surface of the water cooling cover is further provided with an inner recess groove for inlaying the protruding edge of the laser cutting head, and the two water cooling covers are further detachably connected with the same gas cooling cover.

[0006] In summary, the technical scheme has the following beneficial effects: the shell of the laser cutting head will change in size due to thermal expansion and contraction, and the water cooling mechanism needs to be close to the shell of the laser cutting head for rapid heat dissipation, so the full-coverage water cooling mechanism may be squeezed and damaged by the expanded laser cutting head shell during laser cutting operation, and the two water cooling covers are combined to form the water cooling mechanism, the two water cooling covers are relatively independent and can be detachably connected to the laser cutting head, the two first threaded holes are connected by screws, and the left and right screws can fasten the two water cooling covers to the laser cutting head, the water cooling cover can cover the upper half of the QBH joint and the nozzle, and the water cooling cover can quickly dissipate heat by water cooling, and the two water cooling covers can move slightly to prevent the shell of the laser cutting head from being squeezed and damaged due to thermal expansion and contraction.

[0007] The two connecting holes can be connected with water pipes, the cooling liquid flows through the water pipes, enters one connecting hole and flows out of the other connecting hole, so as to realize circulation of the cooling liquid and cooling of the laser cutting head, and the water pump for realizing the flow of the cooling liquid can be installed elsewhere, and the water pipe is used as a channel for the flow of the cooling liquid.

[0008] The air cooling cover can not only be used to spray auxiliary gas for heat dissipation, but also can further enclose the two water cooling covers to increase the installation strength and prevent the water cooling cover from falling off.

[0009] The cooling mechanism is composed of two water cooling covers which can be easily detached, and can be installed on or detached from the laser cutting head as needed, and the two water cooling covers can also move slightly to prevent the laser cutting head from being squeezed and damaged due to thermal expansion and contraction. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a three-dimensional structure diagram of the laser cutting head QBH joint and nozzle cooling mechanism.

[0011] Figure 2 It is a top view of the air cooling cover.

[0012] Figure 3 It is a top view of the air cooling cover.

[0013] Figure 4 It is a top view of the air cooling cover.

[0014] Figure 5 It is a top view of the air cooling cover.

[0015] Figure 6 It is a side view of the water cooling cover.

[0016] Figure 7A schematic view of the three-dimensional structure of the laser cutting head of the present application.

[0017] Reference numerals: 1, water cooling cover; 2, connecting hole; 3, first threaded hole; 4, annular accommodating groove; 5, elastic member; 6, air cooling cover;

[0018] 11, tapered hole; 12, rectangular member; 13, air inlet hole; 14, third threaded hole; 15, screw; 16, second abutting member; 17, transmission shaft; 18, inner groove;

[0019] 111, clamping groove;

[0020] 131, air chamber; 132, air outlet hole;

[0021] 171, fan blade; 172, fan blade;

[0022] 21, heat dissipation pipe;

[0023] 61, butt joint; 62, annular rectifying groove; 63, rectifying hole; 64, plugging member; 65, second threaded hole; 66, insertion slot;

[0024] 661, first abutting member. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. Identical parts are denoted by identical reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0026] Reference Figures 1-7 As shown in the drawings, a laser cutting head QBH joint and nozzle cooling mechanism comprises two water cooling covers 1, which are arranged in a 180° annular array and are clamped and fixed on the laser cutting head in a hollow cylindrical shape when folded. The side of the water cooling cover 1 away from the other water cooling cover 1 is provided with two connecting holes 2 that communicate the inside and outside of the water cooling cover 1, and the side of the water cooling cover 1 close to the other water cooling cover 1 is provided with a plurality of first threaded holes 3. The surface of the water cooling cover 1 is also provided with an inner groove 18 for inlaying the protruding edge of the laser cutting head. The two water cooling covers 1 are also detachably connected to the same air cooling cover 6.

[0027] Since the shell of the laser cutting head will produce slight changes in size due to thermal expansion and contraction, and the water cooling mechanism needs to be close to the laser cutting head shell for the need of rapid heat dissipation, the full-coverage water cooling mechanism may be squeezed and damaged by the expanded laser cutting head shell during the laser cutting operation, therefore, two water cooling covers 1 are adopted to form the water cooling mechanism in the application, the two water cooling covers 1 are relatively independent and can be detachably connected to the laser cutting head, the two first threaded holes 3 are connected by screw thread connection, and the left and right two side screws can fasten the two water cooling covers 1 on the laser cutting head, the water cooling cover 1 can cover the upper half of the QBH joint and the nozzle, and the water cooling cover 1 can produce slight movement, preventing the shell of the laser cutting head from being squeezed and damaged due to thermal expansion and contraction;

[0028] The two connecting holes 2 can be externally connected to water pipes, the cooling liquid flows through the water pipes and enters one connecting hole 2 and flows out of the other connecting hole 2, so as to realize the circulation of the cooling liquid and cool the laser cutting head, and the water pump for realizing the flow of the cooling liquid can be installed elsewhere, and the water pipe is used as a channel for the flow of the cooling liquid;

[0029] The air cooling cover 6 can not only be used for spraying auxiliary gas for heat dissipation, but also can further imprison the two water cooling covers 1, increasing the installation strength and preventing the water cooling cover 1 from falling off;

[0030] The two water cooling covers 1 are used to form the cooling mechanism, which can be installed on or detached from the laser cutting head as needed, and slight movement can be produced between the two water cooling covers 1, preventing the cooling mechanism from being squeezed and damaged due to thermal expansion and contraction of the laser cutting head.

[0031] Further, the side of the water cooling cover 1 close to the other water cooling cover 1 is provided with an annular accommodating groove 4 coaxially arranged with the first threaded hole 3, and the annular accommodating groove 4 is connected with a hollow cylindrical elastic member 5, and the length of the elastic member 5 is longer than the sum of the depths of the two annular accommodating grooves 4;

[0032] The annular accommodating groove 4 is arranged around the first threaded hole 3, and the elastic member 5 accommodated in the annular accommodating groove 4 is used as a buffer, the two water cooling covers 1 cannot accurately know the appropriate position when they are closed by the screw, if the screw is rotated excessively, the two water cooling covers 1 may be squeezed and damaged, and if the screw is not rotated to the position, the two water cooling covers 1 are easy to fall off from the laser cutting head, therefore, the elastic member 5 with a length longer than the sum of the depths of the two annular accommodating grooves 4 is arranged, when the screw is rotated excessively, the elastic member 5 is squeezed and generates a reverse pressure, which can be obviously felt by the operator, so as to play a prompting role, and when the screw is not rotated to the position, the reverse pressure brought by the elastic member 5 cannot be felt, which also plays a prompting role.

[0033] Further, the water cooling cover 1 is provided with a plurality of taper holes 11 with the same taper as the QBH joint and a rectangular member 12 for cooperating with the laser cutting head, and the taper hole 11 is provided with a clamping groove 111 for cooperating with the cutting head QBH joint;

[0034] The middle of the top of the water cooling cover 1 is a taper hole 11 with the same taper as the QBH joint of the cutting head, and the outside is provided with a rectangular member 12, so that it can be directly embedded around the connection of the QBH joint, and the clamping groove 111 in the taper hole 11 cooperates with the boss on the QBH joint, which can limit the up and down movement of the water cooling cover 1.

[0035] Further, the water cooling cover 1 is also provided with an air inlet hole 13 for connecting an air pipe, and the air inlet hole 13 is connected with an air chamber 131, and the air chamber 131 is connected with an air outlet hole 132 arranged towards the direction of laser emission;

[0036] The air cooling cover 6 is provided with a butt joint 61 matched with the air outlet hole 132 and an annular flow regulating groove 62 in communication with the butt joint 61, and the annular flow regulating groove 62 is provided with a plurality of flow regulating holes 63 arranged towards the nozzle direction of the laser cutting head, and the plurality of flow regulating holes 63 are arranged in an annular array;

[0037] The water cooling cover 1 is also provided with a structure for spraying auxiliary gas, which can also play a cooling role, so that the QBH joint can be cooled by water cooling, and the nozzle can be cooled by air cooling, and the auxiliary gas can still play the original function of assisting laser cutting, and the air cooling cover 6 can further regulate the auxiliary gas, so that the auxiliary gas is concentrated at the nozzle when sprayed, and the nozzle of the cutting head is cooled at all times during cutting. In addition, the water cooling cover 1 wraps part of the nozzle, so it can also play a certain water cooling and heat dissipation role on the nozzle. The auxiliary gas can also take away part of the heat in the cooling liquid when moving in the water cooling cover 1, playing a cross heat dissipation role, effectively improving the heat dissipation efficiency of the nozzle.

[0038] Further, the annular flow regulating groove 62 is also fixedly connected with a blocking piece 64, and the blocking piece 64 is arranged corresponding to the joint of the two water cooling covers 1, and the length of the blocking piece 64 is longer than the maximum gap length of the joint of the two water cooling covers 1, and when the two water cooling covers 1 are installed and jointed, the blocking piece 64 blocks the gap of the joint of the two water cooling covers 1;

[0039] In this way, when the two water cooling covers 1 are jointed, they will not leak air due to slight movement.

[0040] Further, the air cooling cover 6 is in the shape of a cube with a circular hollow in the middle, two air outlet holes 132 are arranged at one diagonal of the air cooling cover 6, two second threaded holes 65 are arranged at the other diagonal of the air cooling cover 6, and a third threaded hole 14 is arranged at the bottom of the water cooling cover 1, the third threaded hole 14 is threadedly connected with a screw 15 which is threadedly connected with the corresponding second threaded hole 65, the inner diameter of the air cooling cover 6 is smaller than the outer diameter of the QBH joint and larger than the outer diameter of the nozzle;

[0041] During installation, the following operations are performed:

[0042] The elastic member 5 is inserted into the annular accommodating groove 4, and the two water cooling covers 1 are folded together;

[0043] The positions of the two water cooling covers 1 are fixed by screws;

[0044] The folded two water cooling covers 1 are installed on the laser cutting head;

[0045] The air cooling cover 6 is installed at the bottom of the water cooling cover 1.

[0046] Further, the air cooling cover 6 is further provided with a slot 66, the slot 66 is provided with a first abutting member 661, and the bottom of the water cooling cover 1 is fixedly connected with a second abutting member 16 in the shape of "L", when the air cooling cover 6 is installed on the water cooling cover 1, the first abutting member 661 is located between the bottom of the water cooling cover 1 and the second abutting member 16;

[0047] After the air cooling cover 6 is installed, the first abutting member 661 can further fix the air cooling cover 6 by abutting the bottom of the water cooling cover 1 and the second abutting member 16.

[0048] Further, a plurality of transmission shafts 17 are rotatably connected in the water cooling cover 1, the transmission shafts 17 are fixedly connected with fan blades 171 arranged in the air chamber 131 and fan blades 172 arranged outside the air chamber 131 and used for stirring the cooling liquid, and the air outlet hole 132 is arranged below the fan blade 171 farthest from the air inlet hole 13;

[0049] In order to further enhance the heat dissipation effect, the cooling liquid needs to flow, so as to avoid the situation that heat is accumulated in part of the cooling liquid while other parts of the cooling liquid are not heated, therefore, the fan blades 172 for stirring the cooling liquid are arranged in the water cooling cover 1, the fan blades 172 are connected with the transmission shafts 17, and the transmission shafts 17 are connected with the fan blades 171 arranged in the air chamber 131, so that the auxiliary gas flowing through can drive the fan blades 171 to rotate, thereby driving the fan blades 172 to rotate, achieving the purpose of forced cooling liquid flow, and the air outlet hole 132 is arranged below the fan blade 171 farthest from the air inlet hole 13, so as to ensure that all the fan blades 171 are driven to rotate by the flowing auxiliary gas.

[0050] Further, the through hole 2 is connected with a "U"-shaped heat dissipation pipe 21, the bottom of the heat dissipation pipe 21 is arranged close to the fan blade 172, the cooling liquid in the water cooling cover 1 is oil cooling liquid, and the cooling liquid in the heat dissipation pipe 21 is water cooling liquid;

[0051] Compared with the oil cooling liquid, the water cooling liquid has greater specific heat capacity but poorer heat conduction efficiency. If only the water cooling liquid is used, the water cooling liquid cannot be quickly cooled, and the nozzle and the QBH joint are prone to quickly heat up. If only the oil cooling liquid is used, the cooling liquid needs to be quickly circulated. However, the high-speed moving laser cutting head affects the circulation of the cooling liquid. Therefore, only the water cooling liquid or the oil cooling liquid is not suitable. Therefore, the oil cooling liquid with high heat conduction efficiency is used as an internal heat dissipation conductor to quickly and evenly cool the temperature of the nozzle and the QBH joint. The water cooling liquid has greater specific heat capacity and is used as an external heat dissipation conductor to reduce the requirement for the circulation speed and increase the fault tolerance.

[0052] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A laser cutting head QBH joint, nozzle cooling mechanism, characterized in that, The utility model provides a laser cutting head cooling device, including two water cooling covers (1), two water cooling covers (1) are arranged in 180 degree annular array, and two water cooling covers (1) are folded and are hollow cylindrical to be clamped and fixed on laser cutting head, the side of water cooling cover (1) away from another water cooling cover (1) is provided with two connecting water cooling cover (1) inside and outside's interface hole (2), the side of water cooling cover (1) near another water cooling cover (1) is equipped with a plurality of first threaded hole (3), water cooling cover (1) surface is also equipped with for inlaying the inner recess (18) of laser cutting head convex edge, two water cooling covers (1) still can detachably connect with same gas cooling cover (6); The water cooling cover (1) is also provided with an air inlet hole (13) for connecting an air pipe, the air inlet hole (13) is connected with an air chamber (131), and the air chamber (131) is connected with an air outlet hole (132) arranged towards the laser emission direction; The gas cooling cover (6) is provided with a butt joint (61) matched with the air outlet hole (132) and an annular flow regulating groove (62) communicated with the butt joint (61), the annular flow regulating groove (62) is provided with a plurality of flow regulating holes (63) arranged towards the nozzle direction of the laser cutting head, and the plurality of flow regulating holes (63) are arranged in an annular array; A plurality of transmission shafts (17) are rotatably connected in the water cooling cover (1), the transmission shaft (17) is fixedly connected with a fan blade (171) arranged in the air chamber (131) and a fan blade (172) arranged outside the air chamber (131) and used for stirring the cooling liquid, and the air outlet hole (132) is arranged below the fan blade (171) farthest from the air inlet hole (13).

2. A laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The side of the water cooling cover (1) near the other water cooling cover (1) is also provided with an annular accommodating groove (4) coaxially arranged with the first threaded hole (3), the annular accommodating groove (4) is connected with a hollow cylindrical elastic member (5), and the length of the elastic member (5) is longer than the sum of the depths of the two annular accommodating grooves (4).

3. A laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The top of the water cooling cover (1) is provided with a plurality of taper holes (11) with the same taper as the QBH joint and a rectangular member (12) used for cooperating with the laser cutting head, and the taper hole (11) is provided with a clamping groove (111) used for cooperating with the QBH joint of the cutting head.

4. The laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The annular flow regulating groove (62) is also fixedly connected with a plugging member (64), the plugging member (64) is arranged at the folding position of the two water cooling covers (1), and the length of the plugging member (64) is longer than the maximum gap length at the folding position of the water cooling cover (1); When the two water cooling covers (1) are installed and folded, the plugging member (64) blocks the gap at the folding position of the two water cooling covers (1).

5. The laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The gas cooling cover (6) is in the shape of a cube with a circular hollow in the middle, the two air outlet holes (132) are arranged at one diagonal of the gas cooling cover (6), the other diagonal of the gas cooling cover (6) is provided with two second threaded holes (65), the bottom of the water cooling cover (1) is also provided with a third threaded hole (14), the third threaded hole (14) is threadedly connected with a screw (15) threadedly connected with the corresponding second threaded hole (65), and the inner diameter of the gas cooling cover (6) is smaller than the outer diameter of the QBH joint and larger than the outer diameter of the nozzle; When installing, the following operations are performed: Insert the elastic member (5) into the annular accommodating groove (4), and fold the two water cooling covers (1); Fix the positions of the two water cooling covers (1) by screws; Install the folded two water cooling covers (1) on the laser cutting head; Install the air cooling cover (6) on the bottom of the water cooling cover (1).

6. A laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The air cooling cover (6) is further provided with a slot (66), the slot (66) is provided with a first abutting member (661), and the bottom of the water cooling cover (1) is fixedly connected with an "L"-shaped second abutting member (16); When the air cooling cover (6) is installed on the water cooling cover (1), the first abutting member (661) is located between the bottom of the water cooling cover (1) and the second abutting member (16).

7. The laser cutting head QBH joint, nozzle cooling mechanism according to claim 1, characterized in that, The connecting hole (2) is connected with a "U"-shaped heat dissipation pipe (21), the bottom of the heat dissipation pipe (21) is close to the fan blade (172), the cooling liquid in the water cooling cover (1) is oil cooling liquid, and the cooling liquid in the heat dissipation pipe (21) is water cooling liquid.

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