Air conditioner copper pipe hole drawing device

Abstract

The utility model discloses an air conditioner copper pipe hole pulling device which comprises a drilling and pulling assembly, the drilling and pulling assembly comprises a hole pulling drill bit, a chuck, a drilling motor and a movable seat, the chuck is rotationally connected to the movable seat, the drilling motor is installed on the movable seat and drives the chuck to rotate, a handle part is formed on the upper portion of the hole pulling drill bit, and the handle part is connected with the chuck. A drilling head used for machining a through hole of a copper pipe is formed at the lower end of the hole pulling drill bit, an edge hooking shaft shoulder used for hooking the edge of the through hole of the copper pipe is formed between the lower end of the handle part and the drilling head, and the chuck is connected with the handle part in a clamping mode. The drill bit three-axis shifting mechanism is used for driving the hole pulling drill bit to spirally move upwards, and the drill bit three-axis shifting mechanism is in driving connection with the movable seat; and the copper pipe clamp assembly is used for clamping and fixing a copper pipe and is arranged below the movable seat. The air conditioner copper pipe hole drawing device is good in reliability and good in machining flexibility.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning copper tube processing devices, in particular to an air-conditioning copper tube hole pulling device. Background Art

[0002] At present, air-conditioning copper tubes are used to transport refrigerants. One type of air-conditioning copper tube needs to have an outer flange hole processed on one side wall. The branch tube is inserted into the outer flange hole, and the branch tube and the outer flange are welded and sealed by brazing. The outer flange supports the branch tube, which is conducive to the stable welding of the branch tube and avoids the formation of an inward flange that affects the flow of refrigerant. The existing hole-pulling device is used to form an external flanging hole. For example, the Chinese utility model patent publication number CN216966354U "A hole-pulling drive structure for pipe drilling": the other end of the drill bit extends to the outside of the rotary seat, and the drill bit is provided with two inclined holes extending from the side wall to the end, and a hole-pulling needle assembly is arranged in each inclined hole. The surface of the rotary seat is provided with two spiral guide grooves, and the other end of the hole-pulling needle assembly can be slidably engaged in the interior of a spiral guide groove. When the adjustment shaft drives the drill bit to rotate forward relative to the rotary seat, one end of the hole-pulling needle assembly extends to the outside of the drill bit, and when the adjustment shaft drives the drill bit to reverse relative to the rotary seat, one end of the hole-pulling needle assembly is retracted into the inside of the drill bit; the combined structure of the above-mentioned drill bit and the hole-pulling needle assembly is complex and difficult to manufacture, especially when it is necessary to process an external flanging hole with a smaller diameter on the wall of a copper tube, the drill bit and the hole-pulling needle assembly are difficult to be made into a small structure, and the strength of the above-mentioned structure is too low, it is easy to be damaged, and the reliability is poor, so it is necessary to improve the hole-pulling device of the prior art. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a device for extracting holes from copper tubes of an air conditioner, which has good reliability and good processing flexibility.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] The utility model discloses an air-conditioning copper pipe hole extraction device, comprising a drilling and extraction assembly, the drilling and extraction assembly comprising a hole extraction drill bit, a chuck, a drilling motor and a movable seat, the chuck is rotatably connected to the movable seat, the drilling motor is installed on the movable seat, the drilling motor drives the chuck to rotate, the upper part of the hole extraction drill bit is formed with a shank, the lower end of the hole extraction drill bit is formed with a drilling head for processing the through hole of the copper pipe, a hook shoulder for hooking the edge of the through hole of the copper pipe is formed between the lower end of the shank and the drilling head, and the chuck is clamped and connected to the shank; it also includes a drill bit three-axis shifting mechanism for driving the hole extraction drill bit to spirally move upward, and the drill bit three-axis shifting mechanism is driven and connected to the movable seat; it also includes a copper pipe clamp assembly for clamping and fixing the copper pipe, and the copper pipe clamp assembly is arranged below the movable seat;

[0006] The hook shoulder includes a concave arc portion, which is arranged to be inclined downward from the inside to the outside, and the upper end of the concave arc portion is connected to the lower end of the handle;

[0007] A convex arc corner portion is formed between the lower end of the concave arc portion and the upper end of the drilling head.

[0008] Preferably, the air-conditioning copper tube hole-pulling device of the utility model also includes a base plate and a gantry, the drill bit three-axis shifting mechanism includes a drill bit lifting linear module, a drill bit lateral movement linear module and a drill bit longitudinal movement linear module, the drill bit longitudinal movement linear module is installed on the base plate, the gantry is installed on the drill bit longitudinal movement linear module, the drill bit lateral movement linear module is installed on the upper part of the gantry, the drill bit lifting linear module is installed on the drill bit lateral movement linear module, and the movable seat is installed on the drill bit lifting linear module.

[0009] Preferably, the copper tube clamp assembly includes clamping blocks distributed on the left and right sides of the copper tube, and the copper tube clamp assembly includes a clamping cylinder, which drives the corresponding clamping block to move left and right.

[0010] Compared with the prior art, the utility model has the following beneficial effects: by setting a chuck to be rotatably connected to a movable seat, a drilling motor is installed on the movable seat, the drilling motor drives the chuck to rotate, a shank is formed on the upper part of the hole-pulling drill bit, a drilling head for processing the through hole of the copper tube is formed on the lower end of the hole-pulling drill bit, a hook shoulder for hooking the edge of the through hole of the copper tube is formed between the lower end of the shank and the drilling head, the chuck clamps and connects the shank, a drill three-axis shifting mechanism for driving the hole-pulling drill bit to spirally move upward is set, and the drill three-axis shifting mechanism drives and connects the movable seat, so that the hole-pulling drill bit of the utility model can be relatively simplified, that is, the hole-pulling drill bit can be relatively miniaturized with higher strength, so the reliability of the air-conditioning copper tube hole-pulling device of the utility model is relatively good, and the processing flexibility is also good. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view structural schematic diagram of the air-conditioning copper tube hole extraction device of the utility model.

[0012] Figure 2 The utility model is a schematic diagram of the hole extraction drill bit drilling a copper pipe.

[0013] Figure 3 It is a schematic diagram of a state in which the shank of the hole extraction drill of the utility model is against the edge of the through hole of the copper tube.

[0014] Figure 4 The utility model is a schematic diagram of the outer flange formed by processing the hook side shoulder of the hole extraction drill bit.

[0015] Figure 5 It is a schematic diagram of the hole extraction drill bit of the utility model being separated from the copper pipe.

[0016] Figure 6 It is a partial structural schematic diagram of the hole extraction drill bit of the utility model.

[0017] Explanation of reference numerals: drilling and extraction assembly 1; extraction drill bit 11; shank 111; drilling head 112; hook shoulder 113; concave arc portion 1131; convex arc corner portion 1132; chuck 12; drilling motor 13; movable seat 14; copper tube clamp assembly 2; clamping block 21; clamping cylinder 22; drill bit three-axis shifting mechanism 3; drill bit lifting linear module 31; drill bit lateral movement linear module 32; drill bit longitudinal movement linear module 33; base plate 4; gantry 5; copper tube 99; through hole 990; outer flange 991. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] The utility model of the air conditioner copper tube hole extraction device is as follows Figure 1 As shown, the drilling and pulling assembly 1 includes a hole pulling drill 11, a chuck 12, a drilling motor 13 and a movable seat 14. The chuck 12 is rotatably connected to the movable seat 14. The rotation axis of the chuck 12 is vertically arranged. The drilling motor 13 is installed on the movable seat 14. For example, the drilling motor 13 is installed on the motor seat, and the motor seat is installed on the movable seat 14 by screws. The drilling motor 13 drives the chuck 12 to rotate. Specifically, the output shaft of the drilling motor 13 is connected to the chuck 12 through a coupling. The chuck 12 can refer to the drill extension rod on the market. The rod portion of the drill extension rod is cylindrical, which is convenient for the chuck 12 to connect to the movable seat 14 through a bearing. Figure 2 and Figure 6 As shown, a shank 111 is formed at the upper portion of the hole extracting drill 11, and the shank 111 is a cylindrical shank. A drilling head 112 for machining the through hole 990 of the copper tube 99 is formed at the lower end of the hole extracting drill 11, and a drilling edge is formed at the lower end of the drilling head 112. A hook shoulder 113 for hooking the edge of the through hole 990 of the copper tube 99 is formed between the lower end of the shank 111 and the drilling head 112. In other words, the outer diameter of the upper end of the drilling head 112 is greater than the outer diameter of the shank 111, thereby forming the hook shoulder 113. Figure 1 and Figure 2 As shown, the chuck 12 clamps the connecting handle 111. Figure 1 As shown, the air conditioner copper tube hole extraction device of the utility model also includes a drill bit three-axis shifting mechanism 3 for driving the hole extraction drill bit 11 to move spirally upward, and the drill bit three-axis shifting mechanism 3 is driven to connect the movable seat 14, that is, the drill bit three-axis shifting mechanism 3 can drive the hole extraction drill bit 11 to move up and down, left and right, and front and back in a composite motion (translation); Figure 1As shown, the air-conditioning copper tube hole extraction device of the utility model further includes a copper tube clamp assembly 2 for clamping and fixing the copper tube 99 , and the copper tube clamp assembly 2 is arranged below the movable seat 14 .

[0020] The following briefly describes the working principle of the air conditioner copper tube hole extraction device of the utility model: Figure 1 As shown, the copper tube clamp assembly 2 clamps and fixes the copper tube 99, and the axis of the copper tube 99 extends in the front-to-back direction. The drill bit three-axis shifting mechanism 3 drives the movable seat 14 to move downward, and the drilling motor 13 drives the chuck 12 to rotate, so that the hole extraction drill bit 11 rotates and moves downward at the same time. Figure 2 As shown, the drilling head 112 of the hole-pulling drill 11 drills a through hole 990 (specifically a single-sided through hole) on the upper portion of the copper tube 99, and the drilling head 112 moves down into the copper tube 99, and the drilling motor 13 stops working or reduces the speed, as shown in FIG. Figure 3 As shown, the drill bit three-axis shift mechanism 3 drives the hole-pulling drill bit 11 to move radially, so that the shank 111 approaches the edge of the through hole 990, and then the drill bit three-axis shift mechanism 3 drives the hole-pulling drill bit 11 to spirally rise. For example, after the hole-pulling drill bit 11 orbits horizontally for one circle (that is, the drill bit three-axis shift mechanism 3 drives the shank 11 to track the edge movement of the through hole 990), the drill bit three-axis shift mechanism 3 drives the hole-pulling drill bit 11 to move up a certain distance, and then orbits for one circle again, and the cycle continues, so that the hook shoulder 113 pushes the edge of the through hole 990 upward, as shown in FIG. Figure 4 As shown, the edge of the through hole 990 is gradually plastically deformed and turned up, and finally, as shown in FIG. Figure 5 As shown, the through hole 990 forms an outer flange 991, and the hole-pulling drill bit 11 is separated from the copper tube 99; since the edge of the through hole 990 is approximately parallel to the hook shoulder 113 at the beginning, it is not easy to squeeze the edge of the through hole 990 at first, so the initial rise amplitude of the hole-pulling drill bit 11 per circle can be set smaller, and when the drilling head 112 is close to being separated from the through hole 990, the rise amplitude of the hole-pulling drill bit 11 per circle can be increased accordingly, which is beneficial to improving work efficiency. Since the air-conditioning copper tube hole-pulling device of the utility model is provided with a drill bit three-axis shifting mechanism 3 to drive the hole-pulling drill bit 11 to spirally rise, the hook shoulder 113 can hook up the edge of the through hole 990 all around, thereby avoiding the need to set a complex telescopic convex structure (such as an extending rod, ball bearing, etc.) on the hole-pulling drill bit 11. Figure 6As shown, the structure of the hole-pulling drill bit 11 of the utility model can be relatively simplified, and it is relatively easy to manufacture the hole-pulling drill bit 11 of the utility model, and it is also easy to miniaturize the hole-pulling drill bit 11. Since the structure of the hole-pulling drill bit 11 is relatively simple, the integrity is strong and the structural strength is high. Even if the outer diameter of the drilling head 112 is set to be small, the hole-pulling drill bit 11 is not easily damaged, so that the reliability of the air-conditioning copper tube hole-pulling device of the utility model is better. Therefore, the air-conditioning copper tube hole-pulling device of the utility model is suitable for processing smaller diameter outer flanging holes on the copper tube 99, especially for the case where the diameter of the outer flanging hole is significantly smaller than the outer diameter of the copper tube 99. Since the hole-pulling drill bit 11 is easily clamped by the chuck 12, it is also very convenient to replace the hole-pulling drill bits 11 of different specifications. After replacing the hole-pulling drill bits 11 of different specifications, the drill bit three-axis shifting mechanism 3 changes the path of driving the hole-pulling drill bit 11 to move accordingly, so that different sizes of outer flange holes can be processed; and, when the size of the through hole 990 is constant, by changing the radius of the revolution of the hole-pulling drill bit 11, the height of the outer flange 991 protruding from the outer surface of the copper tube 99 can be fine-tuned, so the processing flexibility of the air-conditioning copper tube hole-pulling device of the utility model is also good.

[0021] Furthermore, if Figure 6 As shown, the hook shoulder 113 includes a concave arc portion 1131, and the concave arc portion 1131 is arranged to be inclined downward from the inside to the outside, that is, the end of the concave arc portion 1131 close to the central axis of the shank 111 is higher than the end of the concave arc portion 1131 away from the central axis of the shank 111, and the upper end of the concave arc portion 1131 is connected to the lower end of the shank 111, so that the upper end of the concave arc portion 1131 is an upwardly raised arc, that is, the upper end of the concave arc portion 1131 and the shank 111 have a relatively smooth transition, so that in the early stage of the hook shoulder 113 processing the edge of the through hole 990, the upper part of the concave arc portion 1131 can guide the edge of the through hole 990 to be gradually bent, thereby avoiding the through hole 990 from being hooked and cracked significantly or the copper tube 99 from being obviously deformed, and at the same time, it is also beneficial to reduce the load of the drill bit three-axis shift mechanism 3.

[0022] Furthermore, if Figure 6 As shown, a convex arc corner portion 1132 is formed between the lower end of the concave arc portion 1131 and the upper end of the drilling head 112. The convex arc corner portion 1132 can also be understood as a rounded corner structure, such as Figure 4 As shown, after the outer flange 991 is formed to a certain extent, it turns into a convex arc corner 1132 to contact the inner wall of the copper tube 99. The convex arc corner 1132 gently guides the inner wall of the copper tube 99 to slide relatively off the drilling head 112, which can reduce the resistance of the hole-pulling drill bit 11 and avoid obvious scratches on the inner wall of the outer flange hole.

[0023] Furthermore, if Figure 1As shown, the air-conditioning copper pipe hole extraction device of the present invention also includes a base plate 4 and a gantry 5. The drill bit three-axis displacement mechanism 3 includes a drill bit lifting linear module 31, a drill bit lateral displacement linear module 32 and a drill bit longitudinal displacement linear module 33. The linear module is a product on the market. For example, the linear module includes a servo motor, a slider, a guide rail and a ball screw pair. The slider slides linearly on the guide rail. The servo motor drives the screw of the ball screw pair to rotate. The slider is installed on the nut of the ball screw pair, so the servo motor can drive the slider to move linearly. Figure 1 As shown, the drill longitudinal linear module 33 is installed on the base plate 4, and the gantry 5 is installed on the drill longitudinal linear module 33. Specifically, the gantry 5 is installed on the slider of the drill longitudinal linear module 33, the drill transverse linear module 32 is installed on the upper part of the gantry 5, and the drill lifting linear module 31 is installed on the drill transverse linear module 32. More specifically, the guide rail of the drill lifting linear module 31 is relatively fixed on the slider of the drill transverse linear module 32, and the movable seat 14 is installed on (the slider of) the drill lifting linear module 31. Therefore, the drill transverse linear module 32 can drive the gantry 5 to move forward and backward, the drill transverse linear module 32 can drive the drill lifting linear module 31 to move left and right, and the drill lifting linear module 31 can drive the movable seat 14 to move up and down, so that the drill lifting linear module 31, the drill transverse linear module 32 and the drill longitudinal linear module 33 work in coordination, so that the hole extraction drill 11 can be spirally moved upward. Since the linear module is purchased in a modular manner, it is convenient to design and manufacture the air conditioner copper tube hole extraction device, which is beneficial to shorten the production cycle and reduce costs. By setting the gantry 5, the clamp 12 can be erected to a sufficient height, which is convenient for arranging the copper tube clamp assembly 2.

[0024] Furthermore, if Figure 1 As shown, the copper tube clamp assembly 2 includes clamping blocks 21 distributed on the left and right sides of the copper tube 99, and the copper tube clamp assembly 2 includes a clamping cylinder 22. The clamping cylinder 22 drives the corresponding clamping block 21 to move left and right. Therefore, when the left and right clamping blocks 21 are relatively separated, the copper tube clamp assembly 2 releases the copper tube 99. When the left and right clamping blocks 21 are relatively close, the copper tube clamp assembly 2 can radially clamp and fix the copper tube 99. The clamping cylinder 22 can use a three-axis cylinder to avoid the need to set a complex linear moving structure of the clamping block 21. In order to avoid the copper tube 99 from being offset to the left and right when being clamped, a limiting structure can be set for the clamping block 21 on the right, and the clamping cylinder 22 connected to the clamping block 21 on the left can be set to a relatively small thrust to avoid the clamping cylinder 22 on the left position pushing the clamping block 21 on the right position; a row of support rollers can be set on the lower side of the copper tube 99, the axis of the support rollers is set along the left and right directions, and the support rollers are arranged in the front and rear directions.

Claims

1. An air-conditioning copper tube hole extraction device, characterized in that: The invention comprises a drilling and pulling assembly (1), wherein the drilling and pulling assembly (1) comprises a hole pulling drill bit (11), a chuck (12), a drilling motor (13) and a movable seat (14), wherein the chuck (12) is rotatably connected to the movable seat (14), the drilling motor (13) is mounted on the movable seat (14), and the drilling motor (13) drives the chuck (12) to rotate, the upper part of the hole pulling drill bit (11) is formed with a shank (111), and the lower end part of the hole pulling drill bit (11) is formed with a drilling head (112) for machining a through hole (990) of a copper tube (99). A hook shoulder (113) for hooking the edge of the through hole (990) of the copper tube (99) is formed between the lower end of the shank (111) and the drilling head (112), and the chuck (12) is clamped and connected to the shank (111); it also includes a drill bit three-axis displacement mechanism (3) for driving the hole extraction drill bit (11) to move upward in a spiral manner, and the drill bit three-axis displacement mechanism (3) is driven and connected to the movable seat (14); it also includes a copper tube clamp assembly (2) for clamping and fixing the copper tube (99), and the copper tube clamp assembly (2) is arranged below the movable seat (14); The hook-edge shoulder (113) comprises a concave arc portion (1131), the concave arc portion (1131) is arranged to be inclined downward from the inside to the outside, and the upper end of the concave arc portion (1131) is connected to the lower end of the handle (111); A convex arc corner portion (1132) is formed between the lower end of the concave arc portion (1131) and the upper end of the drilling head (112).

2. The air conditioner copper tube hole extraction device according to claim 1, characterized in that: The drill bit three-axis displacement mechanism (3) further comprises a base plate (4) and a gantry (5); the drill bit three-axis displacement mechanism (3) comprises a drill bit lifting linear module (31), a drill bit transverse displacement linear module (32) and a drill bit longitudinal displacement linear module (33); the drill bit longitudinal displacement linear module (33) is mounted on the base plate (4); the gantry (5) is mounted on the drill bit longitudinal displacement linear module (33); the drill bit transverse displacement linear module (32) is mounted on the upper part of the gantry (5); the drill bit lifting linear module (31) is mounted on the drill bit transverse displacement linear module (32); and the movable seat (14) is mounted on the drill bit lifting linear module (31).

3. The air conditioner copper tube hole extraction device according to claim 2, characterized in that: The copper tube clamp assembly (2) comprises clamping blocks (21) arranged on the left and right sides of the copper tube (99), and the copper tube clamp assembly (2) comprises a clamping cylinder (22), wherein the clamping cylinder (22) drives the corresponding clamping block (21) to move left and right.

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